KR101236543B1 - method for transmitting/receiving traffic information and apparatus for transmitting/receiving traffic information - Google Patents

Abstract

The present invention relates to a traffic information transmission and reception apparatus and a traffic information transmission and reception method. The present invention can transmit and receive traffic information in a broadcast transmission / reception form such as DVB-T or DVB-H. To this end, in order to transmit and receive traffic information in the form of broadcast transmission / reception such as DVB-T or DVB-H, service information in the form of broadcast transmission / reception or table information for parsing traffic information in program information is provided. Can be set. The traffic information transmitted from the descriptor of the table information can be parsed.

Traffic information, congestion, DVB, DVB-T, DVB-H, CTT, PMT. PAT

Description

Method for transmitting and receiving traffic information and apparatus for transmitting and receiving traffic information {method for transmitting / receiving traffic information and apparatus for transmitting / receiving traffic information}

1 is a diagram schematically illustrating a digital multimedia broadcasting system for providing traffic information;

2 is a diagram illustrating an example of a format of a signal through which traffic information is transmitted and received;

3A and 3B illustrate a transport format of a congested traffic state container and a location container, respectively, included in the traffic message.

4A-4I illustrate the syntax for each application in a traffic information message indicating congested traffic.

5 illustrates the syntax of additional information carried in a state component.

6A-6K illustrate syntax for each element of a location container of traffic information.

7A to 7C are diagrams illustrating the at least one location reference table for obtaining location information on traffic information.

8 is a diagram illustrating an embodiment of a transmitting device capable of transmitting the above-described traffic information.

9 is a diagram illustrating signal arrangement according to a result of the frame forming unit forming a frame in the example of FIG. 8;

10 is a view showing another embodiment of a transmitting device capable of transmitting the above-described traffic information traffic

11 is a diagram illustrating an example in which a service to which a type slicing scheme is applied to DVB-H and a service transmitted on a common channel of DVB-T and DVB-H are transmitted on a channel;

FIG. 12 illustrates an example of a location of a descriptor that may include and transmit service information about traffic information. FIG.

13A and 13B are diagrams illustrating PAT and PMT, respectively, program information transmitted in an MPEG-2 TS format signal;

14 is a diagram illustrating a descriptor capable of parsing a broadcast signal on which traffic information is transmitted according to the present invention.

15 is a view showing an embodiment of a receiving device for receiving traffic information according to the present invention

16 is a flowchart illustrating an embodiment of a traffic information receiving method according to the present invention;

The present invention relates to a traffic information transmission and reception method and a traffic information transmission and reception apparatus.

With the development of mobile communication, it is possible to receive a broadcast while moving, and to transmit a variety of additional information in a broadcast signal. As traffic information can be useful information for people who want to move along the means of transportation, ways to be transmitted through various broadcasting media are being considered. As the traffic volume increases, the necessity of traffic information is increasing. However, when receiving various types of traffic information through various terminals with different manufacturers or functions and providing the information to the user, it is impossible to provide unified traffic information to the user. There is a problem that can give a great inconvenience.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a traffic information transmission and reception method and a traffic information transmission and reception apparatus capable of efficiently transmitting traffic information to a mobile receiving terminal.

Another object of the present invention is to provide a traffic information transmission and reception method and a traffic information transmission and reception apparatus capable of providing information related to a congestion state of a traffic section among traffic information.

In order to achieve the above object, the traffic information transceiving apparatus and the traffic information transceiving method according to the present invention can transmit and receive traffic information in a broadcast transmission / reception form such as DVB-T or DVB-H. To this end, in order to transmit and receive traffic information in a broadcast transmission / reception form such as DVB-T or DVB-H, table information for parsing traffic information into service information or program information in broadcast transmission / reception form Can be set. The traffic information transmitted from the descriptor of the table information can be parsed.

In one aspect of the present invention, the present invention converts an audio signal, a video signal, a data signal including traffic information about a road section average speed prediction, and program information about the traffic information into a broadcast transport stream, respectively. Multiplexing, encoding the multiplexed signals in preparation for an error, interleaving the encoded signals, and fixing a distributed pilot signal and a time-varying signal within a frame of the interleaved signals. Mapping each of the continuous pilot signals, modulating the signals in the mapped frame by an orthogonal frequency division multiplexing (OFDM) scheme, and adding a portion of the modulated signals to the converted signals to which the modulated signal belongs; Inserting a protective section into the frame and inserting the protective section; It provides a traffic information transmission method comprising: transmitting a call to an RF signal.

The program information of the multiplexing may be program map table information including a descriptor of the traffic information. The traffic information for the section average speed prediction of the road may include identifier information for the section average speed prediction of the road, information indicating a component data length for the section average prediction, and speed information for the section average speed prediction. And information about an average speed prediction time. The traffic information may include information about a name of a traffic information service, information describing the traffic information service in detail, information about a logo of the service, subscriber information of the service, additional information about the service, and a user to refer to. It may include at least one information from the help information.

In another aspect, the present invention comprises the steps of converting the data signal including the traffic information for the average road speed prediction into an IP (internet protocol) datagram, generating a broadcast transport stream including the converted IP datagram, video signal Multiplexing a broadcast transport stream including an audio signal, a broadcast transport stream including the traffic information, and program information for the traffic information, encoding the multiplexed signal in preparation for an error, and interleaving the encoded signal. The method may include: mapping a distributed pilot signal changed according to time in a frame of the interleaved signal and a fixed continuous pilot signal according to time; modulating the mapped intra-frame signals in an orthogonal frequency division multiplexing (OFDM) scheme. A part of the modulated signals is added to the converted signals. In addition, there is provided a traffic information transmission method comprising the step of inserting a guard interval in the frame to which the modulated signal belongs, and converting the signal in which the guard interval is inserted into an analog signal and transmitting it as an RF signal.

In still another aspect, the present invention provides traffic information including an identifier of an application indicating information on a congestion state of a road and an identifier of a service component indicating information on the average speed prediction within the application; Multiplexing program information for parsing the traffic information from the stream into a broadcast transport stream, encoding the multiplexed signal in preparation for an error occurrence, interleaving the encoded signal, and interleaving Mapping a distributed pilot signal changed according to time in a frame of the signal and a fixed continuous pilot signal according to time, modulating the mapped intra-frame signals in an orthogonal frequency division multiplexing (OFDM) scheme, and Add some more to the converted signals And inserting a guard interval in a frame to which the modulated signal belongs, and converting the signal having the guard interval inserted into an analog signal and transmitting the signal as an RF signal.

In yet another aspect, the present invention provides an audio signal, a video signal, a multiplexer for multiplexing a broadcast signal stream including service data for the traffic information and traffic data including the prediction of the section average speed, and error generation. An encoder for encoding the multiplexed signal and interleaving the encoded signal, mapping a distributed pilot signal changed according to time in a frame of the encoded signal and a fixed continuous pilot signal according to time A mapping unit modulates the signals mapped by the mapping unit in an orthogonal frequency division multiplexing (OFDM) scheme, and adds a part of the modulated signals to the converted signals to insert a guard interval in a frame to which the modulated signal belongs. A frame forming unit and a transmitting unit transmitting the converted signal as an RF signal Provide value include traffic information sent to Xinjiang.

In another aspect, the present invention is a signal conversion unit for converting a data signal including traffic information for the section average speed prediction into an IP (Internet protocol) datagram, and generating a broadcast transport stream including the IP datagram, the signal A multiplexer for multiplexing the broadcast transport stream generated by the converter, a broadcast transport stream including a video signal and an audio signal, and program information related to the traffic information, and an encoding for encoding and interleaving a signal multiplexed by the multiplexer for error correction A mapping unit for mapping a distributed pilot signal changed according to an intra frame time of a signal encoded by the encoder and a continuous pilot signal fixed according to time, or an orthogonal frequency division multiplexing (OFDM) signal in the frame mapped by the mapping unit Modulated in such a manner that, a portion of the modulated signals In addition to the converted signals to provide a traffic information transmission apparatus including a frame forming unit for inserting a protection interval in the frame to which the modulated signal belongs, and a transmission unit for transmitting the signal generated by the frame forming unit as an RF signal.

In yet another aspect, the present invention provides a tuner for receiving a broadcast signal including traffic information for section average speed prediction and program information for the traffic information, and a pilot signal whose position changes with time among frames of the broadcast signal received by the tuner. A demodulator for demodulating the broadcast signal in consideration of a pilot signal having a fixed position according to a time and a time; a decoder for decoding the broadcast signal demodulated by the demodulator into a video, audio, and data signal; A data decoder for parsing a data signal including traffic information and a demultiplexer for demultiplexing program information for the traffic information and program information output by the demultiplexer to output the traffic information from the data signal. A traffic information storage unit for storing traffic information output by the data decoder; It provides a traffic information receiving apparatus including a data broadcasting application manager for implementing the traffic information stored in the traffic information storage unit as a broadcast application.

In still another aspect, the present invention provides a method for receiving a broadcast signal obtained by multiplexing traffic information on a section average speed prediction of a road and table information capable of parsing the traffic information into a broadcast transport stream, and receiving the received broadcast signal. Demodulating the broadcast signal in consideration of a distributed pilot signal that changes with time and a fixed continuous pilot signal according to time, and decoding the demodulated signal to obtain the broadcast transport stream; Parsing traffic information using the table information, obtaining identifier information of a stream including the traffic information from the parsed information, receiving the traffic information using the identifier information, and using the traffic information. Traffic information receiving method comprising the step of implementing and expressing a traffic information service The ball.

According to another aspect of the present invention, an audio signal, a video signal, a data signal including traffic information on a road section average speed prediction, and a program signal for program information on the traffic information are received in a frequency domain. Performing channel compensation in consideration of the distributed pilot signal and the continuous pilot signal of the received signal, demodulating the channel compensated signal according to an OFDM scheme, and performing error correction on the demodulated signal to output a broadcast transport stream And demultiplexing the broadcast transport stream, parsing program information on the traffic information, obtaining a data signal including the traffic information, and displaying information on the obtained road section average speed prediction. It provides a traffic information receiving method.

In yet another aspect, the present invention provides an audio signal, a video signal, a data signal including an IP (Internet protocol) datagram containing traffic information about a road section average speed prediction, and program information about the traffic information. Receiving a multiplexed broadcast signal in a region, performing channel compensation of the received signal in consideration of a distributed pilot signal and a continuous pilot signal of the received signal, demodulating the channel compensated signal according to an OFDM scheme, and Outputting a broadcast transport stream by performing error correction on a demodulated signal, demultiplexing the broadcast transport stream to parse program information on the traffic information, and obtaining a data signal including an IP datagram of the traffic information Step, the data container of the IP datagram included in the data signal It provides a traffic information receiving method comprising the step of obtaining traffic information for the average road speed prediction from the road section and expressing the information for the road speed average speed prediction obtained.

In still another aspect, the present invention provides traffic information including an identifier of an application indicating information on a congestion state of a road and an identifier of a service component indicating information on the average speed prediction within the application; Receiving a broadcast signal multiplexed in the frequency domain program information for parsing the traffic information from the stream, channel compensation of the received signal in consideration of the distributed pilot signal and the continuous pilot signal of the received signal Performing demodulation on the channel compensated signal according to an OFDM scheme, performing error correction on the demodulated signal, and outputting a broadcast transport stream; demultiplexing the broadcast transport stream to program information on the traffic information Parsing, parsing the program information Obtaining, from the result, traffic information identified by an identifier of an application indicating information on a congestion state of a road, and an identifier of a service component indicating information on a section average speed prediction within the application; and It provides a traffic information receiving method comprising the step of expressing information on the obtained road section average speed prediction.

In the following, the present invention will be described for the traffic information according to the present invention for easy description. Traffic information includes Congestion and Travel and Time Information (CTT), Safety Drivng Information (SDI), Point of Interest (POI), Public Transport Information (PTI), In addition to road traffic message (RTM), runner window information (PKI), traffic status image information (TSI), and a variety of information including news information (NWS). Therefore, hereinafter, traffic information is used as a term referring to information including the above information. In addition, the term "TPEG" used in the following description or drawings to facilitate the description means that the information is related to traffic information.

1 is a diagram schematically illustrating a digital multimedia broadcasting system for providing traffic information. A method of providing traffic information with reference to FIG. 1 is as follows.

The digital multimedia broadcasting system includes a network 110 for collecting traffic information-related content, a traffic information providing server 120 for providing the collected content, a broadcasting center 130 and a terminal 140. The broadcaster's traffic information providing server 120 may reconstruct various traffic information collected from various routes, for example, operator inputs and other servers via the network 110, and may be configured with various terminals such as mobile phones, vehicles, or the like. Personal digital assistant (PDA) 146 and other receivers mounted on portable terminals transmit the data through the transmitter of broadcast center 130. In addition, the terminal may include a computer such as a navigator or a notebook, but is not limited thereto. Here, the traffic information providing server 120 may use a digital broadcasting data channel as a route for transmitting traffic information, but may use a wired or wireless Internet, for example, a broadband wireless medium such as Wi-Fi or Wibro (Wireless Broadband Internet). You can also use the Internet by cable. In particular, when using a data service of a digital multimedia broadcasting service (DMB), a transparent data channel (TDC) or a multimedia object transport (MOT) protocol of a digital broadcasting medium may be used.

2 is a diagram illustrating an example of a format of a signal through which traffic information is transmitted and received. The container included in the traffic information providing format and the traffic information will be described with reference to FIG. 2.

The traffic information providing format transmitted by the traffic information providing server 120 wirelessly may have a sequence form of a message segment as illustrated in FIG. 2.

The message segment includes traffic information, and the example of FIG. 2 displays a message segment for traffic information as a message. Each message segment containing traffic information includes a message management container 202, a traffic information container 204, and a location container 206.

As described above, traffic information can be transmitted with a lot of information. In the following example, congestion and travel and time information (hereinafter, CTT or congestion traffic state information) indicating a congestion state of the road among the traffic information will be described as an example of traffic information. Thus, the above traffic information container 204 may be referred to as a state container for congested traffic.

A message management container 202 for congestion traffic information includes message identification information, date and time information, and this information is used to manage the information received at the traffic information receiving apparatus. Message identification information, which is an essential element of the message, includes a message identifier and a version number. Here, the message identifier (MID) is an identifier for one message related to each state in a service component included in each traffic information, and in the present invention, the message identification number is increased by 0 to 1, When the maximum size of 65535 is reached, it can be initialized to 0 again. Version Number (VER) means a sequential number for identifying successive messages with one message identifier. For example, the version number can be assigned any number between 0 and 255, and can usually be incremented sequentially.

The date and time included in the message management container may include a start time and end time of the traffic information, a message erasing time, and schedule information. However, the congested traffic state information includes the start time and the end time, the message erasing time, and the schedule information because it includes the information about the current traffic state for each point, rather than the information about the sudden situation of the constantly changing state. You can't. The location container 206 includes location information for informing traffic information.

Multiple congested traffic information of the traffic information container 204 may be delivered to a plurality of service components, respectively, and each component may be distinguished by a component identifier.

3A and 3B illustrate transmission formats of a congested traffic state container and a location container, respectively, included in the traffic information message.

As shown in FIG. 3A, the congestion traffic (CTT) status container 31 includes a ctt component 311 that records a congestion traffic state, a ctt component 313 that records a congestion traffic prediction state, and additional information. The recorded additional information component 315 is included.

The ctt component 311 in which the state of the congestion traffic is recorded includes the state component 331 in which the section average speed is recorded, the state component 333 in which the section travel time is recorded, the state component 335 in which the section delay is recorded, and the congestion type. A state component 337 in which information about the data may be recorded may be included.

The ctt component 313 in which the congestion prediction state is recorded includes a prediction state component 351 in which information on the section average speed prediction is recorded, a prediction state component 353 in which information on the section passing time prediction is recorded, and the congestion trend information. The predicted state component 355 may be included.

A language code indicating a base language for the location reference component is recorded in the location container 32 as shown in FIG. 3B corresponding to the congestion traffic container shown in FIG. 3A, and the location coordinate is A recorded position reference component 324 is included.

Information about the location type ("Location Type") 342 is recorded in the location reference component 324 in which the location coordinates are recorded, which is represented by a link ID as shown in FIG. 7A. By using the link ID, a unique identifier (ID) code may be assigned to each link to transmit information on a road or a section by a code, thereby reducing the amount of data between transmission and reception. have.

Transportation type ("Mode type List") 344 represents a definition of transportation, for example, a code definition of the definition of transportation such as bus, ship, airplane, car.

The link identifier ("Link Identifier") 346 defines which link scheme is to be used in using the link ID. For example, the link identifier may be standardized such as a country node link identifier. You can use the "intelligent traffic system standard node link". In addition, the descriptor 348 includes additional data that may be supplemented or supplemented on an actual link, and may include text data or audio / video data.

The link identifier ("Link Identifier") 346 includes a link identifier 362, which represents a link ID value of an actual road. For example, the link identifier is represented by using a code value of a table defined in the "intelligent traffic system standard node link" determined by the link system in the link identifier (346).

In addition, the link identification information ("Link Identifier") 346 includes information on the link vertex 364. The link vertex 364 is for representing shape point information for representing the link in detail. The representation of Link can be displayed on the map in more detail.

The descriptor 348 may be text or various audio / video data, which may also be used as a name and additional description for a link that is not defined on the Link Identifier. have. When recording a name for a link, a code is written indicating that the descriptor type ("Descriptor Type") 382 is the linkage identifier, and the name or additional description of the link is recorded in the descriptor (384). Can be.

In FIG. 3A, the structure of the congestion traffic state container is shown based on the hierarchical connection relationship between the elements constituting the message, but the syntax of the specific structure for each element is shown in FIGS. 4A to 4I.

Referring to FIGS. 4A to 4I, each syntax will be described in more detail as follows.

In the structure of the CTT component ("ctt_component (80)") that transmits information on the current congestion degree and time of travel included in the congestion traffic state container as shown in FIG. 4A, the CTT component has an identifier '80 hex '( 402 is assigned, one or more (m) state components 406 are included, and a field 404 representing the total data length of the included state components in bytes.

In each state component, information on the aforementioned section average speed, section travel time, section delay and / or congestion type is carried in the syntax illustrated in FIGS. 4B-4E. As illustrated in FIG. 4B, an identifier '00 hex 'is assigned to a state component (“status_component (00)”) carrying information on the section average speed, and data about the speed may be recorded in units of Km / h.

As illustrated in FIG. 4C, an identifier '01 hex 'is assigned to a state component (“status_component (01)”) containing information about a section passage time, and data about a passage time may be recorded in units of seconds. have.

As illustrated in FIG. 4D, an identifier '02 hex 'is assigned to a state component (“status_component (02)”) containing information about an interval delay, and data about the delay time based on the interval is second. Are recorded in units of).

As illustrated in FIG. 4E, an identifier '03 hex 'is assigned to a state component (“status_component (03)”) containing information about a congestion type, and data about the congestion type is used in the congestion degree and travel time information application table 03. Recorded using the code defined in (CTT 03) (see Table 1). For example, 'ctt03_1' for smoothness, 'ctt03_2' for slow motion, 'ctt03_3' for delay, and 'ctt03_4' for congestion.

code

CEN-English "Word"
Comments
Examples
0
unknown


One
Non-congested
Smooth

2
crowded
going slow

3
congested
retard

4
unmoving
Identity
...

255

An identifier '81 hex '412 is assigned to a CTT component ("ctt_component (81)") that transmits prediction information as shown in FIG. 4F and includes one or more (m) state components 416. It has a field 414 representing the total data length of the included state component in bytes. In each state component, the aforementioned section average speed prediction, section pass time prediction, and / or congestion trend information are loaded with the syntax illustrated in FIGS. 4G-4I.

As illustrated in FIG. 4G, an identifier '00 hex 'is assigned to a prediction state component (“prediction_status_component (00)”) containing information about an average speed of the prediction interval, and data about the speed is recorded in units of Km / h. Data about the prediction time specified by the user is included.

As illustrated in FIG. 4H, the identifier '01 hex 'is assigned to the prediction status component (prediction_status_component (01) ") containing information on the section travel time prediction, and the data on the predicted section travel time is in units of seconds. It is recorded as, and includes data about the prediction time specified by the user.

4I, an identifier '02 hex 'is assigned to the prediction status component (prediction_status_component (02) ") containing information on the congestion trend information, and the data on the congestion trend is displayed in the congestion and travel time information message table. Recorded using the code defined in 04 (CTT04) (see Table 2) For example, 'ctt04_1' if the section speed is increased than before, 'ctt04_2' if the section speed is decreased, and if the section speed is the same as before It is represented by "ctt04_3".

code
CEN-English "word"
comments
Examples
0
unknown
One
drawing
2
eliminating
3
constant
4

'''
255

5 is a diagram illustrating syntax of additional information carried in a state component.

As illustrated in FIG. 5, a state component (“ctt_component (8A)”) carrying additional information is assigned an identifier '8A hex', and additional information or auxiliary information related to congestion traffic information for each message is included in the data for the additional information. Information describing the information and the like in text format is included. For example, in the component for the congestion type illustrated in FIG. 4E, the information on the congestion type may be represented by using a code defined in the CTT table, but may be additional information when the situation cannot be represented by a code defined in the table. You can use the state component carrying. For another example, in the state component of the congestion trend illustrated in FIG. 4I, information about the speed trend may be represented by using a code defined in the CTT table, but may not be represented by a code defined in the table. Additional information components are available. Traffic data of each link may be provided to the user by including image data photographed using a camera as an additional information component. Here, the video data includes both a moving picture and a still picture. As another example, if there is a famous restaurant, historic place, or theater within a link indicating status information, the information may be included in the additional information component.

In FIG. 3B, the structure of the location container is shown based on the hierarchical connection relationship between the elements constituting the message. However, the syntax of the specific structure for each element is illustrated in FIGS. 6A to 6K.

As illustrated in Fig. 6A, in the location container ("tpeg_loc_container") indicating location information corresponding to the above-mentioned state information, a base language for the location reference component has code 602 defined in the location reference table loc41 (not shown). ) Is recorded. For example, in Korean, the code "loc41_65" is recorded. In addition, the location container ("tpeg_loc_container") includes one or more (m) location reference components ("tpeg_loc_component") 604.

As illustrated in FIG. 6B, the position reference component ("tpeg_loc_component (00)") containing information about the position coordinate is assigned an identifier "00 hex" 612, and a field 614 indicating the corresponding component data length in bytes. ) Is included. In addition, a field 616 indicating a location type using a code defined in the location reference table loc01 (not shown) is included, and one or more (m) location coordinate components ("co-ordinates_component") 618 are included. Included.

As illustrated in FIG. 6C, a location coordinate component (“co-ordinates_component (00)”) containing information on a type of transportation is assigned an identifier “00 hex” 612, and one or more (m) vehicles Type component ("mode_component") is included.

As illustrated in FIG. 6D, the transportation type component ("mode_component (00)") containing information about the transportation is assigned an identifier "00 hex", and the transportation is performed using a code defined in the TPEG location reference table loc05. Indicate what the mode is. For example, "loc05_2" is shown in the case of a train and "loc05_6" in the case of a bus.

As illustrated in FIG. 6E, an identifier “02 hex” 622 is assigned to a position coordinate component (“co-ordinates_component (02)”) including a description of a section in a road, and the code defined in the position reference table loc03 is assigned. To indicate what type of descriptor is used (624). For example, when the type of descriptor is for a linkage identifier as a description of a section within a road, it is represented as "loc03_44". In addition, the position coordinate component ("co-ordinates_component (03)") containing the description of the interval includes one or more (m) descriptor components ("descriptor_component") 628. In the position coordinate component, a description of the link is recorded as a short string type. Here, the description of the link may be a link identifier or a text description related to the link such as a road name. Writing a linkage identifier of type short string is a waste of bytes. In the present invention, in order to improve this, the position component includes a position coordinate component ("co-ordinates_component") carrying a link identifier using a link or node system defined as a standard.

As illustrated in FIG. 6F, the position coordinate component ("co-ordinates_component (04)") containing information on the link identifier is assigned an identifier "04 hex", and the link identifier is identified using a code defined in the position reference table loc43. Indicates which link scheme is used. For example, if the identifier defined in the "intelligent transportation system standard node link" established by the Ministry of Construction and Transportation is used, it may be represented by the code "loc43_1". The position coordinate component co-ordinates_component (04) "includes one or more (m) link components (" link_component "). The link component may include link identifier or shape point information.

As illustrated in FIG. 6G, the link component ("link_component (00)") carrying the link identifier (Link ID) data is assigned an identifier "00 hex", and is defined in the traffic information receiving terminal and the traffic information server. Link identifier data is included. For example, a link identifier defined in "Intelligent Traffic System Standard Node Link" may be used.

Here, the information on the link identifier may include a position coordinate component containing only a single link identifier as well as a position coordinate component (co-ordinates_component ") carrying a plurality of link identifiers or multiple link identifiers.

As illustrated in FIG. 6H, an identifier "01 hex" is assigned to a link component ("link_component (01)") in which information on the shape points between sections is recorded, and information about the number of shape points of 23 or less is included. . The position coordinate component ("co-ordinates_component (02)") also includes one or more (m) vertex components ("vertex_component") carrying shape point data. Here, the vertex is information for allowing the traffic information receiving terminal to recognize the shape of the section indicated by the link identifier and express it in a graphic suitable for the shape. The vertex is information including latitude and longitude defined in the WGS84 format. However, the term indicating such information is not limited to the term vertex.

As illustrated in FIG. 6I, the vertex component ("vertex_component (00)") in which information about the contour point is recorded in the WGS84 format is assigned an identifier "00 hex", and the order of the contour points starts from zero. And latitude and longitude data in 10 micro-degree units. Using this information, the traffic information receiving terminal having no electronic map can display the shape of the road centered on the current location more closely on the screen. Thus, the number of shape points is a lower scale, e.g., 10000: 1, accumulation rate than the precision of an electronic map provided through a disk medium, which allows the shape to appear when the road is represented on VGA or QVGA. The number of shape points is included and may be 23 or less.

As illustrated in FIG. 6J, the link component ("link_component (02)") carrying information on the road type is assigned an identifier "02 hex", and one or more (m) road type components ("roadtype_component") are assigned. Included.

As illustrated in FIG. 6K, the road type component "roadtype_component" is assigned an identifier "00 hex" so that the type of road is a national road (code loc42_1) using a code defined in the location reference table loc42 (not shown). , Locality (code loc42_2) or highway (code loc42_3).

A location reference table in which the various codes described above are defined will be described with reference to FIGS. 7A to 7C.

The table illustrated in FIG. 7A is a TPEG location reference table 01 used for the position coordinate component ("tpeg_loc_component (00)") carrying information on the location type described above in FIG. 6B. Information about the format of the location is defined as a code. For example, when a location is represented using a node name, it may be represented as "loc01_2". If a location is indicated using a linkage identifier in accordance with an embodiment of the present invention, it is represented by "loc01_10".

The table illustrated in FIG. 7B is the position reference table 03 used for the position coordinate component (“co-ordinates_component (02)”) described in FIG. 6E. Information on what type of descriptor the location is is defined as a code. For example, when the descriptor for the location is the name of a node, it may be represented as "loc03_2". In accordance with an embodiment of the present invention, code 44 (702) has been added to the location reference table 03 to indicate the case where the descriptor for the location is a linkage identifier. Therefore, when the descriptor for the position is a link identifier, it may be represented as "loc03_44".

The table illustrated in FIG. 7C is a location reference table 43 used for the coordinate component ("co-ordinates_component (04)") carrying information on the link identifier described above in FIG. 6F. The code defines the link identifier type and the link identifier type information. For example, if the system used as the link identifier is a national node-link identifier defined in the "intelligent transportation system standard node link" established by the Ministry of Construction and Transportation, it is represented by "loc43_1".

When to transmit the above-described traffic information to the traffic information transmission and reception method and the traffic information transmission and reception apparatus according to the present invention. An example of a form of a transmission signal will be described below.

The traffic information transmission / reception method and the traffic information transmission / reception apparatus according to the present invention may transmit and receive traffic information in a digital video broadcasting terrestrial (DVB-T) or digital video broadcasting-handheld (DVB-H) broadcast signal format.

8 is a diagram illustrating an embodiment of a transmission apparatus capable of transmitting the above-described traffic information. An embodiment of a transmitting apparatus according to the present invention will be described with reference to FIG. 8 as follows.

The audio / video signal, which is a broadcast signal, is multiplexed in the MPEG-2 transport stream (TS) format by the multiplexer 10 and output. The traffic information described above may also be multiplexed together with an audio / video signal that is a broadcast signal in MPEG-2 TS format.

The multiplexer 10 multiplexes a signal of MPEG-2 TS format including traffic information for energy dispersal. The outer coder 21 and the outer interleaver 22 may encode and interleave multiplexed data, respectively, to improve transmission performance for the multiplexed signal. For example, a Reed-Solomon code conversion method may be used as an outer coding method, and a convolution interleaving method may be performed as an interleaving method.

The inner coder 31 and the inner interleaver 32 perform interleaving by recoding a signal to be transmitted in preparation for an error in the transmission signal. The inner coder can encode the transmission signal according to the punctured convolution code, and the inner-interleaving scheme is based on the memory usage according to the transmission modes of 2k, 4k and 8k. Native or in-depth interleaving schemes may be used.

The mapper 35 may map a transmission signal to a symbol according to 16QAM, 64QAM, QPSK, etc. in consideration of pilot and transmission parameter signaling (TPS) according to a transmission mode. The frame forming unit 40 The mapped signal is modulated by an orthogonal frequency division multiplex (OFDM) scheme, and a frame having a guard interval inserted in a data section including the modulated signal is formed. Each frame contains 68 OFDM symbols. Each symbol includes 6817 carriers in 8k mode and 1705 carriers in 2k mode. The guard interval is a cyclic continuation in which data of the data interval is copied, and its length varies depending on the transmission mode. The OFDM frame includes a distributed pilot signal, a continuous pilot signal and a TPS carrier, respectively. The structure of the frame by the frame forming unit of FIG. 8 will be described in detail with reference to FIG. 9.

Digital-to-analog conversion section 41 The digital format broadcast signal having the guard interval and the data interval may be converted into an analog signal, and the transmitter 42 may transmit the converted analog signal as an RF signal. Therefore, traffic information in MPEG-2 transport stream (TS) format can be transmitted in DVB-T format. In this case, the MPEG-2 transport stream (TS) format may be transmitted in a packetized elementary stream (PES) format or may be in a section form.

9 is a diagram illustrating signal arrangement according to a result of the frame forming unit forming the frame in the example of FIG. 8. In FIG. 9, Tu denotes the number of usable subcarriers, Dt denotes the distance between distributed pilots on the time axis, and Df denotes the distance between distributed pilots on the frequency axis, respectively. The distance Df between the distributed pilots in the frequency domain determines the delay range of the ghost that can be estimated in the channel. 9 shows the signals formed by the frame forming unit up to the positions of pilots to be interpolated upon reception.

When receiving the signal, the symbols are arranged such that the same pilot pattern appears every four input symbols so that time interpolation can be performed at the pilot position. That is, the first input symbol (t = 1) arranges the same distributed pilot signal as the symbol input at t = 5, appears, and is input at t = 2, 3, 4 at the position of the distributed pilot signal when the signal is received. Time interpolation may be performed on the symbol.

Also, the symbol input at t = 6 has the same distributed pilot pattern as the symbol input at t = 2, and t = 3,4 on the distributed pilot positions of the symbol input at t = 6 and the symbol input at t = 2. Time interpolation may be performed on signals of, 5.

Therefore, if a symbol is input at t = 7 and then time interpolated in the same manner as described above, since the scattered pilots are located at four subcarrier positions in the symbol input at t = 4, the frequency of the input symbol at t = 4 The interval between the distributed pilot signals in the region is reduced to one quarter of the interval between the original distributed pilot signals, and a symbol input at t = 4 has a pattern in which the distributed pilot signals are located at four subcarrier positions. Therefore, the effect of having more pilot signals in the symbol can be obtained in the signal reception. Therefore, when the signal is transmitted using the continuous pilot signal and the distributed pilot signal, channel compensation can be adaptively performed according to the state of the reception channel at the time of receiving the signal.

FIG. 10 is a diagram illustrating another embodiment of a transmitting device capable of transmitting the above-described traffic information. Another embodiment of a transmission apparatus according to the present invention will be described with reference to FIG. 10.

As another example of transmitting the above-described traffic information, DVB-H (digital video broadcasting-handheld) may be used. DVB-H extends the broadcast area to the mobile portable terminal area and can transmit transmission information as an IP datagram. The IP datagram refers to a signal processing method for transmitting a signal in a packet by an internet protocol, and includes a header including an IP address and a data container for transmitting information. Video, audio, and traffic information signals may be transmitted to a data container of a packet-based IP datagram. In other words, the DVB-H uses an IP protocol (casting method) that transmits an audio signal, a video signal, and a traffic information signal by dividing the packet into packet units and transmitting the compressed signal.

The signal converter 8 may compress the traffic information together with the audio and video signal or in a separate packet unit to convert the traffic information into data including IP. At this time, the IP data is embedded in an MPEG-2 trasnport stream (TS) by multi-protocol encapsulation (MPE). The MPE may be MPE-FEC section data with a forward error correction code (FEC) added. By arranging the transmission signal by a multi-protocol encapsulation-forward error correction (MPE-FEC) scheme, the carrier-to-noise (CN) ratio of the transmission signal can be improved. Accordingly, the MPE-FEC data including the FEC or the MPE data without the FEC may include transmission data in the IP data format.

The IP datagram encapsulated in the MPE by the signal converter 8 may be multiplexed by a time slicing technique to reduce power consumption, and may be a multiplexed signal. And multiplexed with MPEG-2 TS carrying video or audio signals. The modulation and coding unit 50 may include building blocks 21 to 42 of FIG. 8. Traffic information multiplexed with MPEG-2 TS may be transmitted through a broadcast signal through a modulation and encoding process of the DVB-T broadcast signal described with reference to FIG. 8.

11 illustrates an example in which a service to which a type slicing scheme is applied to DVB-H and a service transmitted on a common channel of DVB-T and DVB-H are transmitted on a channel. Programs can be transmitted according to channels of respective DVB-H and DVB-T. In case of DVB-H, each service can be transmitted by time division multiplexing by time slicing. Traffic information may be included in the IP datagram by DVB-H and may be transformed into MPE or MPE-FEC and transmitted to MPEG-2 TS in which the modified MPE or MPE-FEC is embedded.

FIG. 12 illustrates an example of a location of a descriptor that may include and transmit service information about traffic information when traffic information is transmitted through the encoding and modulation processes of FIGS. 8 to 10 described above. to be. Referring to Figure 12 describes the location of the service information for traffic information according to the present invention. In the example of FIG. 12, a descriptor for traffic information to be transmitted is referred to as a TPEG service descriptor for easy explanation.

12 illustrates table information for parsing traffic information when traffic information transmitted by the present invention is transmitted by a broadcast signal. Table information included in the broadcast signal and transmitted may include NIT, BAT, SDT, and EIT as illustrated in FIG. 12. The table of FIG. 12 indicates which table of the transmission signal is included in each of the descriptors for parsing a signal included in the broadcast signal. For example, network_name_descriptor may be included in the NIT and transmitted. Accordingly, when parsing an NIT among broadcast signals, a broadcast signal transmitted according to the content of network_name_descriptor may be obtained.

The TPEG service descriptor, which is service information on traffic information according to the present invention, may be located in at least one table of NIT, SDT, and PMT. The NIT is table information that provides transport stream groups such as channel frequencies and tuning information. SDT is used to carry the service name and parameters in the transport stream. The PMT carries PID information for each video, audio, data, and program clock reference (PCR). When the TPEG service descriptor, which is service information on traffic information, is included in the PMT (Program Map Table) and transmitted, the PMT may be obtained by parsing a PAT (Program Association Table) in MPEG-2 TS. 12 illustrates 0x80 as an identifier tag value of a TPEG service descripter.

13A and 13B are diagrams illustrating a PAT and a PMT respectively included in a MPEG-2 TS format signal and transmitted. PAT is a packet having a PID (packet identifier) of 0 and may play a role of assigning a transport packet to each program. The PID for the packet transmitting the PMT can be obtained from the PAT (a), and the PID for the packet can be obtained from the PMT to identify what information the packet in the stream carries (b). Therefore, if a packet having a PID obtained from the PMT is found, video, audio, and traffic information included in the packet can be obtained.

14 is a diagram illustrating a descriptor capable of parsing a broadcast signal on which traffic information is transmitted according to the present invention. In FIG. 14, a TPEG service descriptor that may be included in a program map table (PMT) may parse a broadcast signal including exemplary traffic information.

First, the TPEG service descriptor may include a descriptor_tag field, a descriptor_length field, a number of service components indicating a number of service components included in the traffic information descriptor, and a number_of_TPEG_ service_components field. It includes as many traffic information sets as the value of. Each traffic information set may include a service component identifier (Service_Component_ID) field, an application identifier (Application_ID) field, and a service information field.

Eight bits are allocated to the Descriptor_tag field, and a value for identifying the traffic information descriptor from another descriptor is assigned.

Eight bits are allocated to the Descriptor_length field and indicate the length from the Descriptor_length field to the end of the descriptor in bytes. 8 bits are allocated to the Service_component_ID (SCID) field and indicate a value for identifying a service component in one service. The Service Component Identifier (SCID) field value may be determined by a service provider.

16 bits are allocated to the Application_ID field, and a value for identifying each application is assigned. That is, each traffic information application is assigned an application identifier (AID), and a new AID is assigned every time a new application is defined.

Each traffic information in the loop includes a service name (Service_name) field, a service description (Service_description) field, a service logo (Service_logo) field, a subscriber information (Subscriber_information) field, any text information (Free_text_information) field, Help information (Help_information) May contain fields. The length of each field in the service information field is variable and is displayed in at least one of a string, a number, and a graphic.

The Service_name field indicates a service name for traffic information and enables a user to identify a service. For example, it may include a service name of 'traffic information service of A broadcaster'.

The Service_description field indicates a detailed description of the corresponding service and is for describing the service content in more detail. For example, it may be transmitted by including a service description of 'public transport information outside the city of the metropolitan area.'

The Service_logo field displays a service logo and enables visual identification of a service or service provider. The service logo may be transmitted primarily in a bitmap or other image format.

The Subscriber_information field indicates subscriber information. For example, it may include billing and payment information for a limited service component.

The Free_text_information field indicates additional information to be transmitted to the user. For example, it can be transmitted including interruption of service and cancellation of information.

The Help_information field indicates help information for the user to refer to. For example, it may include an Internet address, a telephone number, and the like.

15 is a view showing an embodiment of a receiving device for receiving traffic information according to the present invention. Referring to Figure 15 describes the traffic information according to the present invention. The receiver illustrated in FIG. 15 includes a tuner 701, a demodulator 702, a demultiplexer 703, a audio decoder 704, a video decoder 705, a data decoder 710, and traffic information. The storage unit 711 may be included.

The tuner 701 tunes the frequency of a specific channel through any one of an antenna, a cable, and a satellite and outputs a signal which is down-converted to an intermediate frequency (IF) signal to the demodulator 702. The signal received at the frequency of a specific channel includes an audio signal, a video signal and a traffic information signal, and table information according to service information of the DVB-T / H. The channel manager 707 refers to the channel information stored in the channel map 708 and requests the data decoder 710 for a table related to the service information, and receives the result. The channel manager 707 may control channel tuning of the tuner 701 and may be implemented as a software module.

The demodulator 702 demodulates the signal output from the tuner 701, and the demultiplexer 703 classifies a video signal or an audio signal and a signal including traffic information in TS packet units.

The demultiplexer 703 outputs the TS packet including the traffic information to the data decoder 710. The data decoder 710 may decode a TS packet including traffic information, program specific information (PSI) according to MPEG-2, and table information according to service information (DVB-SI). In the example of FIG. 15, it is assumed that traffic information is transmitted in the form of a digital storage media command and control (DSM-CC) section during payload of a TS packet.

When the traffic information message is transmitted in the MPEG-2 TS format according to the DVB-T / H format, the data decoder 710 may include the TPEG included in the PMT among the table information according to MPEG-2 TS and DVB-SI (service information). The service descriptor can be parsed.

The data decoder 710 parses the traffic information from the DSM-CC section including the traffic information and stores the traffic information in the traffic information storage 711. The data decoder 710 collects sections having the same table identifier table_id to form a table. The data decoder 710 may database service information in the traffic information storage unit 711 and store a traffic information message. When the data decoding unit 710 parses the traffic information descriptor, the application identification information, service component identification information, service information (eg, service name, service description, service logo, subscriber information, etc.) of the traffic information message transmitted to the corresponding channel, Arbitrary text information, help information, etc.) can be obtained.

The first application manager 706 illustrated in FIG. 15 may drive a native application program stored in the storage unit 709 to perform a general function such as channel switching. Here, the native application program refers to software that is embedded since the receiving device is manufactured and released. The first application manager 706 displays a graphical user interface (GUI) on a screen in response to a user's request when a user request is made to the receiving system through a user interface (UI). The user interface receives a user request through an input device such as a remote controller, a keypad, a jog dial, a touch screen provided on the screen, and outputs the user request to the first application manager 706, the data broadcasting application manager 713, and the like. The first application manager 706 may control the channel manager 707 to manage channel related operations, that is, the channel map 708, and control the data decoder 710. The first application manager 706 stores and restores the GUI control of the entire receiving system, the user request, and the state of the receiving system in the storage unit 709.

When there is a data service request by a user interface (UI), the data broadcasting application manager 713 drives a corresponding application program stored in the storage unit 709 to process the requested data and provides the data service to the user. To provide. The data broadcast application manager 713 supports a GUI for such data service. Here, the data service is provided in the form of text, voice, graphic, still image, moving picture, and the like.

The data broadcast application manager 713 may be a software or hardware platform for executing an application program stored in the storage 709. The platform may be, for example, a Java virtual machine for executing a Java program. The data broadcasting application manager 713 executes a traffic information providing application program stored in the storage unit 709 to process a traffic information message stored in the traffic information storage unit 711 and provides a traffic information service.

The traffic information service that can be provided by the present invention is provided by the user through at least one of a text, voice, graphic, still image, and video in a receiver that is not equipped with an electronic map or a GPS, or is not equipped with both an electronic map and a GPS. It may be provided to. If the GPS module 714 is installed in the receiving system as shown in FIG. 14, the GPS module 714 receives satellite signals transmitted from a plurality of low-orbit satellites and extracts current location information (longitude, latitude, and altitude). The current broadcast location information may be output to the data broadcast application manager 713. In this case, an electronic map including information on each link and node of the road and various graphic information are stored in the traffic information storage unit 711 or the storage unit 709 or another storage not shown. There may be. By executing the traffic information providing application program, the data broadcasting application manager 713 requests the user based on the current location acquired through the GPS module 714 and the traffic information message stored in the traffic information storage unit 711. Can provide traffic information services.

At the request of the data broadcasting application manager 713, the traffic information message stored in the traffic information storage unit 711 is read and input to the data broadcasting application manager 713. The data broadcasting application manager 713 may interpret the traffic information message read from the traffic information storage unit 711 and extract necessary information and / or control signals according to the content of the message. For ease of explanation, assume that the user has requested a service for congested traffic conditions.

The data broadcasting application manager 713 extracts message identification information, message generation time, and message transmission time in the message management container 102 of the traffic information message. "CTT-status container"). Here, the message element information includes a message identifier and a version number, which are essential elements included in all messages, and are used for traffic information message management purposes of the data broadcasting application manager 713.

If the CTT status container ("CTT-status container") 104, the CTT status container ("CTT-status container") 104 to perform the display operation according to the traffic state information of the road and the prediction information for the traffic state (104) Obtain information from the CTT component in the. In addition, location information corresponding to the currently transmitted communication information is obtained from the subsequent location container 106.

Here, the location information is the location coordinates (longitude and latitude) of the start point and the end point according to the location type information of the location container, or the link, that is, the link identifier assigned to the road section. If necessary, the section corresponding to the received information is specified by referring to the information on each link and the node stored in the traffic information storage unit 711. In addition, the position coordinates of the received link may be converted into a link ID and vice versa. According to an embodiment of the present invention, when the location type information is a link identifier and the location information is text information such as a link identifier or a road name associated with the link, a section corresponding to information on a communication state received by referring to information on a corresponding link Can be specified. Alternatively, when the location information is a link identifier and the link identifier is a defined code, the information on the corresponding link corresponds to the information on the communication state received by referring to the link system stored in the traffic information storage unit 711. The section can be specified.

Meanwhile, the data broadcasting application manager 713 reads out the necessary electronic map from the traffic information storage unit 711 based on the current position coordinates received from the GPS module 714 and displays it on the screen. In this case, a specific graphic symbol may be displayed at a point corresponding to the current position. The data broadcasting application manager 713 controls the section average speed information received through the traffic information message to be displayed in the section corresponding to the position coordinate or the link ID of the location container following the container carrying the information. In this case, the color is changed according to the average speed of the section (for example, in the case of a general road, red is 0-10km per hour, orange is 10-20km per hour, green is 20-40km per hour, and blue is 40km per hour) , Or may be displayed as a number in the corresponding section. When the congestion trend information extracted from the traffic information message has a value of 1 or 2, a string ('increase', 'decrease') or an icon assigned to the value may be displayed together on the link. If it is 0 or 3, the separate displayed state is not updated. If the congestion degree trend information is information on the rate of change of the average speed, the screen is displayed according to a request from the user. This is to reduce the driver's visual confusion due to being displayed together, and may be displayed together within the possible range, for example, a set driving route or a route ahead.

If there is no traffic information storage unit 711 or other storage unit in which an electronic map is stored in the receiving device, the section average speed is displayed by color or displayed as a number only for the link in front of the current driving route. If a receiving device, for example, a vehicle equipped with a traffic information receiving terminal is in a state in which a route to be driven is set, the section average speed is to be displayed for links included in the driving route, not links in front of the vehicle. Can be.

In addition, when the information added to the traffic information message is information about a famous restaurant or theater in the link, the data broadcasting application manager 713 displays the corresponding point on the link displayed on the screen to distinguish the information, and displays the corresponding information. You can also control the text to be displayed on the screen.

In response to a user's request, the data broadcasting application manager 713 may display information on the section travel time, section delay and congestion type for each link extracted from the traffic information message on the screen instead of or along the section average speed. It may be. If the user requests the prediction information on the traffic condition of the road by designating the prediction time, the data broadcasting application manager 713 may calculate the estimated average speed of each section received in the traffic information message, instead of the current average speed. It is displayed as a number. Of course, when the user requests the display mode in the predicted travel time mode instead of the predicted average speed, the predicted travel time information of each section is displayed on the electronic map or graphic screen on the screen.

When the automatic path search function for the destination is set in the reception device illustrated in FIG. 15, a preferred path may be searched or re-searched based on the received average section speed or interval prediction transit time. For example, for each link after a node that will arrive 30 minutes after the current driving speed, select the link that has the shortest time to the destination set using the estimated average speed or the segmented predicted passing time after 30 minutes. You can display the path on the screen. When the embodiment of the receiving apparatus of FIG. 15 is provided with a voice output means, it is also possible to output the communication state information or the prediction information about the communication state, etc., received for the designated link by voice.

The information and / or control signals extracted from the traffic information message may be temporarily stored in a volatile memory (not shown), such as a writable RAM, and then used by the data broadcasting application manager 713. The data broadcasting application manager 713 uses the information in the volatile memory and then discards the information within a predetermined time, for example, the last 1 hour, every 20 minutes (time, time 20 minutes, time 40 minutes) without discarding the information. Save the transit time. Depending on the amount of memory, you can lengthen the last time and shorten the interval for saving. When the average speed provided for each section is stored, when the user selects a specific link, the data broadcasting application manager 713 stores the average speed history or section passing time history and the predicted section average stored for the link. Displays the speed or travel time of the forecast section in the form of a graph. In this case, the numerical values displayed on the graph convert the stored information into km / h in the case of the speed information, and display the expression name of the current link, for example, the road name, at the top of the graph.

The expression name of the link according to the present invention is a link identifier or a road name, which is recorded and received in the location coordinate component or the link component included in the location container described above. Or included in the electronic map in the second storage unit 711. In addition, current and previous traffic information and future prediction information can be displayed in various ways.

16 is a flowchart illustrating an embodiment of a traffic information receiving method according to the present invention. An embodiment of a traffic information receiving method according to the present invention will be described with reference to FIG. 16 illustrates an example of receiving traffic information from a broadcast signal when traffic information is included in the DVB-T / H and transmitted.

When a channel selection or channel change is input (step 722) while the receiving apparatus is powered on (step 721), the channel map is tuned to a physical frequency corresponding to the selected or changed channel (step 722). 723).

A traffic information message, program information according to the MPEG-2 TS format, and traffic information data multiplexed with program information according to a broadcast signal may be received at the frequency of the tuned channel. If the traffic information data is received (step 724), the demultiplexer 703 demultiplexes the traffic information message using PID detection and section filtering and table information including PAT / PMT, which is program information. May be step 725.

By parsing the traffic information descriptor from the table information, an application identifier, a service component identifier, service information, etc. related to the traffic information can be obtained. That is, the virtual channel information is extracted by referring to the stream type (ES type) and the PID of the stream packet from the table information on the PAT / PMT (step 726). Here, if there is an A / V ES for broadcast output (step 727), the A / V PID of the corresponding virtual channel (VCH) of the channel map is set (step 728) to perform A / V demultiplexing and decoding. (Step 729). The user may watch the broadcast corresponding to the A / V (step 730).

On the other hand, if there is no A / V ES in the virtual channel in step 727, it is checked whether traffic information data is transmitted to the virtual channel (step 731). The presence or absence of the traffic information data can be obtained by parsing the traffic information descriptor from the table information of the PAT and PMT to obtain an application identifier, a service component identifier, and service information related to the traffic information. Assuming that the traffic information data is transmitted to the DSM-CC section, all the traffic information data in the DSM-CC data format is received using the PID of the ES obtained from the PMT (step 732), and the desired traffic information service is provided. (Step 733).

If it is determined in step 731 that no A / V ES exists in the virtual channel and no traffic information data exists, the virtual channel is determined to be an invalid channel. In this case, it may be displayed that there is no valid channel or signal (step 736). The process then returns to step 724 to newly receive a valid program information table.

On the other hand, it is checked whether there is a channel change request during data service or while watching a broadcast (step 734). If a channel change is requested, and the requested channel change is a virtual channel change, the data broadcast task is reset and the process returns to step 726 to find new virtual channel information. If the requested channel change is a physical channel change, the process returns to step 723 to tune the corresponding physical channel.

If there is no channel change request, it is checked whether the table information versions such as PAT and PMT are up (step 735). If it is confirmed in step 735 that the program information version is up, this means that the channel information has been changed from the broadcaster, and the process returns to step 724 again to receive the channel information table. If it is determined in step 735 that there is no channel information change, the user can continue to watch the broadcast.

According to the present invention, various traffic information can be transmitted using a broadcast signal of DVB-H or DVB-T format. In particular, according to the present invention, information on a congested traffic state can be transmitted to DVB-H or DVB-T.

 It is easy for a person skilled in the art to change or modify the present invention from the present specification. Therefore, although an embodiment of the present invention has been described above clearly, various modifications thereof should be made without departing from the spirit and the scope of the present invention.

The effects of the traffic information transmission and reception method and the traffic information transmission and reception apparatus according to the present invention described above are as follows.

According to the traffic information transceiving method and the traffic information transceiving apparatus according to the present invention, traffic information can be efficiently transmitted to a mobile terminal.

According to the traffic information transmission and reception method and the traffic information transmission and reception apparatus according to the present invention, it is possible to provide information related to a congestion state of a traffic section.

Claims (32)

Multiplexing by converting an audio signal, a video signal, a data signal including traffic information, and program information on the traffic information into a broadcast transport stream; Encoding the multiplexed signals in preparation for an error and interleaving the encoded signals; Mapping, within a frame of the interleaved signals, a distributed pilot signal that changes with time and a fixed continuous pilot signal with time; Modulating the signals in the mapped frame by orthogonal frequency division multiplexing (OFDM), and adding a portion of the modulated signals to the converted signals to insert a guard interval in a frame to which the modulated signal belongs; And Transmitting the signal having the guard interval inserted therein as an RF signal; Including, The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is And an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about coordinates of the shape point. The method of claim 1, And the program information in the multiplexing step is program map table information including a descriptor for the traffic information. The method of claim 1, The traffic information An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information transmission method further comprising an identifier for. Converting a data signal including traffic information into an Internet Protocol (IP) datagram, and generating a broadcast transport stream including the converted IP datagram; Multiplexing a broadcast transport stream including a video signal, an audio signal, a broadcast transport stream including the traffic information, and program information for the traffic information; Encoding the multiplexed signal in preparation for an error and interleaving the encoded signal; Mapping a distributed pilot signal changed according to time in a frame of the interleaved signal with a fixed continuous pilot signal according to time; Modulating the mapped intraframe signals by orthogonal frequency division multiplexing (OFDM), and adding a portion of the modulated signals to the converted signals to insert a guard interval in a frame to which the modulated signal belongs; And Converting the signal with the guard interval inserted into an analog signal and transmitting the RF signal; Including, The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is And an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about coordinates of the shape point. 5. The method of claim 4, In the step of generating a signal of the broadcast transport stream format, the IP (Internet Protocol) datagram is converted into a multiprotocol encapsulation (MPE) method and then included in the broadcast transport stream. 5. The method of claim 4, And the program information in the multiplexing step is program map table information including a descriptor for the traffic information. 5. The method of claim 4, An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information transmission method further comprising an identifier for. delete delete delete delete delete delete A signal conversion unit converting a data signal including traffic information into an IP protocol datagram and generating a broadcast transport stream including the IP datagram; A multiplexer for multiplexing the broadcast transport stream generated by the signal converter, a broadcast transport stream including a video signal and an audio signal, and program information related to the traffic information; An encoder for encoding and interleaving a signal multiplexed by the multiplexer for error correction; A mapping unit for mapping a distributed pilot signal changed according to time in a frame of a signal encoded by the encoder and a fixed continuous pilot signal according to time; The mapping unit modulates signals in a frame mapped by an orthogonal frequency division multiplexing (OFDM) scheme, and adds a portion of the modulated signals to the converted signals to insert a guard interval in a frame to which the modulated signal belongs. A frame forming unit; A transmitter for transmitting the signal generated by the frame former as an RF signal; Including, The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is And an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about coordinates of the shape point. 15. The method of claim 14, And the signal converter converts the IP datagram into a multiprotocol encapsulation (MPE) scheme and generates a broadcast transport stream including the converted MPE signal. 15. The method of claim 14, The traffic information An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information transmission device further comprising an identifier for. 15. The method of claim 14, The traffic information At least one of information on a name of a traffic information service, information describing the traffic information service in detail, information on a logo of the service, subscriber information of the service, additional information on the service, and help information for the user to refer to Traffic information transmission device further comprising. A tuner for receiving a broadcast signal including traffic information and program information about the traffic information; A demodulator for demodulating the broadcast signal in consideration of a pilot signal whose position changes with time and a pilot signal whose position is fixed with time among frames of the broadcast signal received by the tuner; A decoder which decodes the broadcast signal demodulated by the demodulator into a video, audio and data signal; A demultiplexer for demultiplexing a data signal including the traffic information among the signals decoded by the decoder and program information for the traffic information; A data decoder for parsing program information output by the demultiplexer and outputting the traffic information from the data signal; A traffic information storage unit for storing traffic information output by the data decoder; A data broadcasting application manager implementing the traffic information stored in the traffic information storage unit as a broadcasting application; Including, The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is And an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about coordinates of the shape point. 19. The method of claim 18, The traffic information An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information receiving apparatus further comprising an identifier for. 19. The method of claim 18, And the program information is program map table information including a descriptor for the traffic information. Receiving a broadcast signal obtained by multiplexing traffic information and table information capable of parsing the traffic information into a broadcast transport stream; Demodulating the broadcast signal in consideration of a distributed pilot signal that changes with time and a fixed continuous pilot signal according to time among the frames of the received broadcast signal, and decoding the demodulated signal to obtain the broadcast transport stream; Parsing traffic information using the table information in the broadcast transport stream; Obtaining identifier information of the stream including the traffic information from the parsed information, and receiving the traffic information using the identifier information; And Implementing and expressing a traffic information service using the traffic information; Including, The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is Traffic information receiving method comprising an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about the coordinates of the shape point. 22. The method of claim 21, The traffic information An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information receiving method further comprising an identifier for. 22. The method of claim 21, The traffic information At least one of information on a name of a traffic information service, information describing the traffic information service in detail, information on a logo of the service, subscriber information of the service, additional information on the service, and help information for the user to refer to Traffic information receiving method further comprising. 22. The method of claim 21, And the table information is program map table information including a descriptor for parsing the traffic information. Receiving a broadcast signal multiplexed in a frequency domain with an audio signal, a video signal, a data signal including traffic information, and program information about the traffic information; Performing channel compensation in consideration of the distributed pilot signal and the continuous pilot signal of the received signal; Demodulating the channel compensated signal according to an OFDM scheme and performing error correction on the demodulated signal to output a broadcast transport stream; Demultiplexing the broadcast transport stream to parse program information for the traffic information, and to obtain a data signal including the traffic information; And Expressing the traffic information; The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is Traffic information receiving method comprising an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about the coordinates of the shape point. 26. The method of claim 25, The traffic information An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information receiving method further comprising an identifier for. Receiving a broadcast signal multiplexed in a frequency domain with a data signal including an IP (Internet Protocol) datagram carrying an audio signal, a video signal, and traffic information and program information about the traffic information; Performing channel compensation of the received signal in consideration of the distributed pilot signal and the continuous pilot signal of the received signal; Demodulating the channel compensated signal according to an OFDM scheme and performing error correction on the demodulated signal to output a broadcast transport stream; Demultiplexing the broadcast transport stream to parse program information for the traffic information, and to obtain a data signal including an IP datagram of the traffic information; Obtaining traffic information from a data container of an IP datagram included in the data signal; And Expressing the traffic information; The traffic information Includes a plurality of message segments, Each said message segment Includes a message management container, an event container, and a location container, The message management container includes an identifier and a version number of the message, The event container Including current speed information, current travel time information, current delay information, predicted speed information, predicted travel time information, and predicted delay information, The location container is Traffic information receiving method comprising an identifier for a link, shape point information for the link, information about the number of shape points included in the link, and information about the coordinates of the shape point. 28. The method of claim 27, And the program information for the traffic information is program map table information including a descriptor for the traffic information. 28. The method of claim 27, The traffic information An identifier for the current speed information, an identifier for the current travel time information, an identifier for the current delay information, an identifier for the predicted speed information, an identifier for the predicted travel time information, and the predicted delay information Traffic information receiving method further comprising an identifier for. delete delete delete

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