JPH04373284A - Teletext decoder - Google Patents

Abstract

PURPOSE:To provide a simple editor which utilizes a display signal of characters or graphics of a teletext decoder along with a synthetic sound generating function so as to superimpose a title or a caption and a background music on a video signal and a sound signal recorded by a video movie, etc. CONSTITUTION:A controlling part 13 of a teletext decoder in an editing mode is given data of characters or graphics and additional sounds corresponding to a teletext data, by a controlling part 21 or remote controller 25, for the data to be stored in the controlling part 13, and then the data is reproduced to be superimposed on an input video signal and an input sound signal. A memory card in which the data of characters or graphics and additional sounds has been stored is connected to a memory expanding terminal 22 provided at the controlling part 13, or the data of characters or graphics and additional sounds generated by an external personal computer is, by way of a communication channel, applied to an input port provided at the controlling part 13 so as to be temporally stored in a memory in the controlling part 13, and then the stored data is read out to be reproduced.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] Read the data of teletext characters, figures, and additional sounds from a pre-stored memory card, convert them into display signals and synthesized sound signals, and superimpose and mix them on input video and audio signals. This invention relates to a teletext decoder that outputs

0002

[Prior Art] A video signal output from a television receiver or a television tuner that receives television broadcasting is input, a teletext signal is extracted superimposed during the vertical retrace period of the video signal, and the teletext signal is extracted from an operation unit or remote controller. Data of a designated program is read out, converted to a display signal via a display control section, and the display signal is output either alone or superimposed on an input video signal. Furthermore, when the teletext signal includes additional sound data, the additional sound data is converted into a synthesized sound signal via a synthesized sound section such as an FM sound source, and is output together with the display signal.

0003

SUMMARY OF THE INVENTION The present invention utilizes the ability of a teletext decoder to generate characters or figures synchronized with an input video signal, as well as synthesized sounds, and to superimpose them on the same video signal.
Superimposing text titles, etc. on images shot with a video camera and adding background music (Background Music)
).

0004

[Means for solving the problem] The control section is set to an editing mode by specifying the operation section of the teletext decoder or the remote control operation device via the remote control signal receiving section, and character or graphic data is input from the operation section or the remote control operation device. The additional sound data is converted into a display signal via the display control unit and into a synthesized sound signal via the synthesis sound unit, and is sequentially stored in the memory in the control unit and displayed from the operation unit or remote control unit. Upon start designation, the stored data is read out, converted into a display signal and a synthesized sound signal, and outputted superimposed on the input video signal and audio signal, respectively. It is also equipped with an expansion terminal for the memory area that stores received teletext data, and a memory card that stores text, graphics, and additional sound data can be inserted into the terminal, and the memory card can be opened by specifying it using the operation panel or remote controller. The data is read out, converted into a display signal and a synthesized sound signal, and superimposed on the input video signal and audio signal, respectively, and output.

[0005]

[Operation] The teletext decoder 10 of the present invention separates the superimposed teletext signal during the blanking period of the input television broadcast video signal, and stores the error-corrected teletext data in the memory in the control unit 13 in the order in which it was received. , the header section of each program and page of the data stored in the same memory is searched for the specified program number using the operation unit 21 or the remote controller 25, and the teletext data of the specified program number is read out. The character or graphic data identified by the start code of the data unit constituting the data for each page of the teletext data read from the memory in the control unit 13 is converted by the display control unit 14 into a display signal in a format to be displayed on a television screen. Then, the same display signal is output alone or superimposed on the input video signal, and the additional sound data is converted into a synthesized sound signal in the synthesizer section 17, and the same signal is output alone or mixed with the input audio signal. Output.

[0006] The operation section 21 or the remote control operation device 25
With this output, the control operation of the control section 13 is switched to the editing mode, and the control procedure shown in FIG. 3 is executed. That is, by operating the keys on the operating section 21 or the remote controller 25, coded data of characters or figures to be superimposed and displayed on the input video signal according to the data structure of the teletext broadcast, and background music codes to be mixed with the input audio signal. The converted data is input, a program number and a page number that are not used in teletext programs are assigned, and the data is sequentially stored in the memory in the control section 13.

[0007] The operation section 21 or the remote control operation device 25
When a display start signal is input, the data of the specified page of the specified program stored in the memory is read out, and if the data is character or graphic data, it is supplied to the display control section 14, and if it is additional sound data, it is supplied to the synthesized sound section. 17, and the output display signal and synthesized sound signal are superimposed and mixed on the input video signal and input audio signal, respectively, and output.

The control unit 13 is provided with a memory expansion terminal 22 for storing received teletext data, and a memory card 23 is attached to the terminal 22 in which coded data of characters or figures and additional sounds to be displayed is stored in advance. Then, the data stored in the memory card 23 is read out according to a designation from the operation unit 21 or the remote controller 25, and the converted display signal and synthesized sound signal are superimposed on or mixed with the input video signal and audio signal, respectively, as described above. You can also do it. In addition, the coded data of characters or figures displayed on the television screen and background music generated by the graphic editing and musical score editing functions of an external personal computer (not shown) is controlled via a communication line such as RS-232C. Supplied to the input port provided in section 13,
It is also possible to sequentially store the signals in the memory within the control section 13 and convert and output them into a display signal or a synthesized sound signal in the same manner as described above.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A video signal and an audio signal of a television broadcast received and demodulated by a television receiver (not shown) are branched and supplied to a video input terminal 11 and an audio input terminal 19 of a teletext decoder 10 of the present invention, respectively. The video input terminal 11
The input video signal is supplied to the signal receiving section 12, the teletext data separated from the video signal is supplied to the control section 13,
The information is stored in the memory in the control unit 13 in the order of reception. Operation unit 21 or remote control signal receiving unit 2 of teletext decoder 10
4, the control section 13 searches for teletext data stored in the memory within the control section 13, and uses the same operation signal to retrieve the teletext data of the designated program number. read out.

The character or graphic data identified by the start code of the data unit of the teletext data read from the memory in the control section 13 is supplied to the display control section 14 and converted into a display signal in a format to be displayed on a television screen. The signal synthesizer 15 converts the signal and sends it to the video input terminal 11 along with the input video signal.
The display signal is output from the video output terminal 16 either alone or superimposed on the video signal. The additional sound data identified by the start code of the data unit in the data read from the memory is supplied to the synthesized sound section 17, which outputs the generated synthesized sound signal and synthesizes the signal with the audio signal input to the audio input terminal 19. 18, and outputs the synthesized sound signal alone or superimposed on the same audio signal from the audio output terminal 20.

[0011] The operation section 21 or the remote control operation device 25
The operation of the control section 13 is set to the editing mode by the output signal, and input data is input from the operation section 21 or the remote controller 25 according to the data structure of the teletext program according to the control procedure shown in FIG. A program number, etc. that will not be used is assigned to each program and sequentially stored in the memory within the control unit 13. FIG. 2 shows an example of the structure of the input data. The program number included in the program header and page header consists of three digits, with at least one decimal number replaced by a hexadecimal number "A" to "
F", it is possible to identify the teletext program number.

[0012] The operation section 21 or the remote control operation device 25
Along with the data input, the input data itself and a display signal of characters or figures specified by the input data are generated via the display control unit 14, and the output display signal is displayed on the supplied television screen. , the data may be input while checking the input data. Said operation section 2
1 or a display start signal input from the remote controller 25, the stored data is read out, and if the data is character or graphic data, the same data is supplied to the display control unit 14 and converted into a display signal, and the same If the data is additional sound data, the same data is supplied to the synthesized sound section 17 to be converted into a synthesized sound signal, and together with the video signal input to the video input terminal 10 and the audio signal input to the audio input terminal 19, respectively. The display signal and the synthesized sound signal are superimposed on the video signal and the audio signal, and the superimposed display signal and the synthesized sound signal are outputted from the respective output terminals 16 and 20.

[0013] The operation section 21 or the remote control operation device 25
The input data may be input using a memory card 23 that is stored in advance. That is, the control unit 13 is provided with a memory expansion terminal 22 for storing received teletext data, the memory card 23 is attached to the terminal 22, and the data stored in the card 23 is transferred to the operation unit 21 or the remote controller. 25, and convert it into a display signal or a synthesized sound signal and output it in the same manner as described above.

[0014] Furthermore, image and music data based on the teletext data of characters or figures and background music to be displayed are generated using the graphic editing and music score editing functions of an external personal computer (not shown), and The image and music data are supplied to the input port of the control unit 13 of the teletext decoder 10 of the present invention via a communication line, for example, RS-232C, etc. Read and sequentially store in the memory in the control unit 13,
The stored data may be specified by the operation unit 21 or the remote controller 25, read out, and converted and output into a display signal or a synthesized sound signal in the same manner as described above.

[0015]

[Effects of the Invention] As described above, by utilizing the character or graphic video signal and synthesized sound signal generation function of the teletext decoder, video signals and audio signals recorded by video movies etc. can be stored in the memory of the teletext decoder of the present invention. It can be used as a simple home video editing machine by superimposing and outputting a title or subtitle display signal and a background music synthesized sound signal.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a teletext decoder of the present invention.

FIG. 2 is a configuration diagram of data stored in the memory of the teletext decoder of the present invention.

FIG. 3 is a flowchart of a control procedure in edit mode.

[Explanation of symbols]

10 Teletext decoder 11 Video input terminal 12 Signal receiving section 13 Control section 14 Display control section 15 Signal synthesis section 16 Video output terminal 17 Synthetic sound section 18 Signal synthesis section 19 Audio input terminal 20 Audio output terminal 21　Operation section 22 Memory expansion terminal 23 Memory card 24 Remote control signal receiving section 25　Remote control device

Claims (3)

[Claims] Claim 1: A teletext signal superimposed on an input television broadcast video signal is separated and stored in a memory in a control unit, and stored data of a specified program is transmitted from an operation unit or a remote controller via a remote control signal receiving unit. The readout, character or graphic data is converted to a display signal to be displayed on the TV screen via the display control unit, and the additional sound data is converted to a synthesized sound signal via the synthesizer unit and superimposed on the input video signal and audio signal, respectively. In the teletext decoder that outputs, the control section, which is set to edit mode by designation from the operation section or remote control device, receives character or graphic data to be displayed and additional sound data input from the same operation section or remote control device. The same character or graphic data is sequentially stored in the memory within the control unit, and the same character or graphic data is converted into a display signal, the additional sound data is converted into a synthesized sound signal, and the control unit is instructed to start displaying from the operation unit or remote controller. A teletext decoder characterized in that the stored data is read out, converted into a display signal and a synthesized sound signal, and outputted superimposed on an input video signal and an audio signal, respectively. 2. The control unit is provided with a memory area expansion terminal for storing received teletext data, and a memory card storing data of characters or figures to be displayed and additional sound data is inserted in advance into the expansion terminal, Reads data from the same memory card as specified by the operation unit or remote controller, converts character or graphic data into display signals, and converts additional sound data into synthesized sound signals, which are superimposed and output on input video and audio signals, respectively. The teletext decoder according to claim 1, characterized in that: 3. The control unit includes a data input port, and characters or figures generated and output from an external personal computer through the input port to the control unit set to an editing mode by designation of the operation unit or remote controller. 2. The teletext decoder according to claim 1, wherein said data and additional sound data are read and sequentially stored in a memory within said control section.