JP3041147B2 - Multi-screen television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen television receiver for displaying videos of a plurality of channels on the same screen in a divided manner.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional multi-screen television receiver. The display device (CR
FIG. 9A shows an example of a multi-screen of T) 211. As shown in the figure, in this system, one parent screen and eight child screens are displayed on the same screen.
/ 64 (１ ／ in the vertical direction, １ ／ in the horizontal direction) compressed screen. It is also assumed that the child screen displayed as a frame is displayed on the parent screen. Next, a conventional configuration will be described with reference to FIG.

[0003] First, the video processing section will be described. 20
Reference numerals 1 and 202 denote tuners, and the first tuner 201
In response to this, a control signal a for switching channel selection positions of eight channels in a one-second cycle is transmitted from a channel selection control unit 231 of a channel selection microcomputer (hereinafter referred to as a channel selection microcomputer) 212 for controlling channel selection. Sent. 8
After one channel is sequentially switched, channel switching is repeated from the beginning. The video signal output in a time-divisional manner with a one-second cycle is input to the decoder 203 and subjected to video signal processing, and then converted from an analog signal to a digital signal by the A / D conversion circuit 217. The output signal of the A / D conversion circuit 217 is
6 is written to a predetermined address area of the memory 205 assigned to each channel based on the write address signal WA output from the channel 6.

FIG. 9B shows an address area of each channel.
Shown in For example, the address area 401 of the video data for one field of the child screen 301 in FIG. The video data for one field of each of the child screens 401 to 408 is, for example, １ ／ of the video data of the parent screen.
Sampling data of 4 (1/8 horizontal component, 1/8 vertical component).

The write address generation signal WA is generated based on a horizontal synchronization signal, a vertical synchronization signal, and a clock signal from the decoder 203. An output signal from the memory 205 for rewriting and outputting each address area of the eight small screens in a time-division manner is read from a predetermined address based on the read address signal RA of the read address generation circuit 207. Then, the digital signal is converted into an analog signal by the D / A conversion circuit 218 and output.
The read address signal RA is created based on the horizontal and vertical small picture inset pulse signals TP created by the synchronization pulse generation circuit 208 and the control signal c from the tuning control unit 231 of the tuning microcomputer 212. ing.
The synchronization pulse generation circuit 208 is supplied with a horizontal synchronization signal, a vertical synchronization signal, and a clock signal obtained from the decoder 204, and operates in synchronization with these signals. The control signal c is a signal that provides control in a normal mode in which only the main screen is displayed on the CRT 211 and in a channel selection mode in which the main screen and the sub-screen are displayed on the CRT 211.

In the second tuner 202, when a user tunes to a specific channel with the channel tuning microcomputer 212, the control signal b from the tuning control unit 231 is transmitted to the second tuner 202.
Is sent to the tuner 202, and a specific channel is selected. The video signal of the selected channel is supplied to a decoder 2.
The video signal is input to the input terminal 04 and processed and output. This output signal and the output signal from the D / A conversion circuit 218 are input signals of the switch 209. The switching of the switch 209 is performed based on the control signal SW1 output from the read address generation circuit 207. The control signal SW1 is generated based on the control signal c from the channel selection control unit 231 described above. Signal. The output signal of the switch 209 and the pulse signal PD (signal for forming a frame) from the channel selection screen marker generation circuit 216 are output from the switch 21.
9 and is switched based on the control signal c sent from the channel selection control unit 231 of the channel selection microcomputer 212.
The display is output on the RT 211.

The above-mentioned channel selection screen marker generation circuit 216
Is a signal generation circuit for providing a mark on a small screen for a specific channel selected by the second tuner 202. The signal generation circuit includes a horizontal synchronization signal, a vertical synchronization signal, and a clock signal from the decoder 204. It is created based on the control signal b from the tuning control unit 231 of the station microcomputer 212.
As the marker method, frame display, superimposing with characters or symbols on the screen, and the like can be considered. FIG.
(A) shows an example of frame display.

As for the audio processing unit, an output signal of a specific channel selected by the second tuner 202 is subjected to audio signal processing by an audio processing circuit 213,
4 is output.

As described above, according to this conventional example, the video signal of the channel selected by the second tuner 202 is displayed as a moving image on the main screen of the CRT 211 and is output as audio from the speaker 214. You.
In addition, the channel selected by the first tuner 201 in a time-division manner is frame-dropped (quasi-moving image) and displayed on the sub-screen.

[0010]

According to this configuration, the sound output from the speaker is only the sound of the channel displayed on the main screen, and the sound of the sub-screen of a plurality of channels displayed with frame skipping is not output. No output. Therefore, when the user wants to hear the sound of the channel displayed on the child screen, the user must select a channel and switch to the main screen.

The present invention has been made to solve the above-described problem. When the audio selection button is pressed, the sound of the main screen output from the speaker is displayed while the video of the main screen is displayed as a moving image. It is an object of the present invention to provide a multi-screen television receiver that switches to and outputs audio of a selected small screen.

[0012]

A voice control unit is provided in a tuning microcomputer for controlling tuning of a tuner.
Switch for switching the output audio signals of the tuner and the second tuner, and when outputting the audio signal from the first tuner from the speaker, the display screen of the channel is provided with display means for indicating that the audio is being output. Configuration.

[0013]

With the above arrangement, when the user selects the sound of a specific channel, a control signal is sent from the sound control unit to the switch, and the sound of the main screen previously output from the speaker is output. Is switched to the sound of the selected channel or synthesized with the sound of the main screen and output. At the same time, a control signal is sent from the audio control unit to the first tuner, and only the address area of the selected channel is rewritten among the addresses of the memory in which the video data of a plurality of channels is written.
Therefore, dropped frames until now (quasi-video) child screen that has been displayed, the video only voice selected child screen, other child screen is switched to the still image, the display indicating the Oh Turkey in the audio output At this time, the image of the main screen can be continuously viewed as a moving image.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a multi-screen television receiver according to the present invention. CRT 211 in this embodiment
6A is shown in FIG. As in the conventional example, in this embodiment, one parent screen and eight child screens are displayed on the same screen, and the child screen is a 1/64 compressed screen. It is also assumed that the child screen displayed as a frame is displayed on the parent screen.

The operation of the multi-screen television receiver will be described on the assumption that a remote control as shown in FIG. 6B is used to facilitate understanding of the present invention. The remote control has only the minimum functions necessary for the present invention. First, the remote controller will be described with reference to FIG. Reference numeral 601 denotes a channel selection button. When the channel selection button 601 is turned off (in the normal mode described in the conventional example),
When only the main screen appears and the channel selection button 601 is turned on (in the channel selection mode described in the conventional example), the multi-screen is displayed.
Reference numeral 602 denotes an audio selection button, and reference numerals 603 to 618 denote channels. Hereinafter, an embodiment of the present invention will be described with reference to FIG.

The video signal output from the first tuner 201 is input to a decoder 203 and subjected to a decoding process. The video signal is digitized by an A / D converter 217 and is stored in a memory 2.
05. The first tuner 201 cyclically receives signals of eight channels for one second. The video signals of eight channels are cyclically supplied to the memory 205, and the video signals of each channel are reduced and stored in the memory 205. The video signal of the memory 205 is read by the read address from the read address generation circuit 207, converted into an analog signal by the D / A converter 218, and provided to the switch 209. On the other hand, the video signal for the main screen output from the second tuner 202 is decoded by the decoder 204 and supplied to the switch 209.

When a multi-screen is displayed, the switch 209 is controlled by the control signal SW1 output from the read address generation circuit 207, and a multi-screen as shown in FIG. 6A can be obtained. Also, a pulse signal PD for adding a frame to the child screen corresponding to the parent screen is output from the channel selection screen marker generation circuit 216,
Selected by switch 219.

[0019] Now, the user voice selection button (Figure 6 (B)
(602) of FIG. 6 to select a channel of a specific small screen (for example, 603 in FIG. 6B), a control signal d is sent from the audio control unit 232 of the channel selection microcomputer 212 to the channel selection control unit 231. A control signal a is sent from the tuning control unit 231 to the first tuner 201 based on the control signal d, and a specific channel is selected. The signal of the selected channel is input to the decoder 203 to be subjected to video signal processing, converted from an analog signal to a digital signal by the A / D conversion circuit 217, and then input to the memory 205. At this time, data writing to the memory 205 is performed only in the address area of the specific channel selected by the audio selection button, and this is performed by the control signal c sent from the tuning control unit 231 to the write address generation circuit 206. Controlled.

As described above, when the audio selection button is pressed, the memory 205 rewrites the video data only in the address area of the selected channel, and the other channels hold the data immediately before the control signal c is transmitted. Is done. Therefore, the selected child screen is displayed as a moving image, and the other child screens are displayed as still images.

As for the audio system, an audio signal output from the first and second tuners 201 and 202 is supplied to the switch 28.
1 is supplied. The switch 281 selects an audio signal of a specific channel selected by the audio selection button based on the control signal e from the audio control unit 232. This audio signal is supplied to the audio processing circuit 213. Therefore, if the user operates the audio selection button and then operates a specific channel, an audio signal corresponding to the operation is output. FIG. 2 shows another embodiment of the multi-screen television according to the present invention. The video processing unit is the same as in FIG.

Hereinafter, the audio processing unit will be described. In this embodiment, there are two audio processing circuits 213a and 213b and two speakers 214a and 214b. Switch 2
The input to 81 is the output signal of the first tuner 201,
This is an output signal of the audio separation circuit 282. Switch 281
Is switched based on the control signal e from the audio control unit 232 of the channel selection microcomputer 212. This control signal e
Performs control such that the output signal of the second tuner 202 is selected when the audio selection button of the remote control is off, and the output signal of the first tuner 201 is selected when the audio selection button is on. . The sound separation circuit 282 receives the output sound signal of the second tuner 202 and is separated into a main sound and a sub sound. Either of the output signals A1 and A2 of the audio separation circuit 282 may be the main audio signal or the auxiliary audio signal. Then, one output signal A1 is supplied to the switch 281, and the other output signal A2 is supplied to the audio processing circuit 213b.

According to the above embodiment, when the audio selection button of the remote control is off, the image of the main screen is displayed as a moving image,
The image of the child screen is displayed with frame-drop (quasi-moving image), and the audio of the main screen is output from the left and right speakers (main audio from one speaker and auxiliary audio from another speaker). And when the audio selection button is on,
The video of the main screen is displayed as a video, the video of the selected sub-screen is displayed as a video, the other sub-screens are displayed as still images, and the audio of the selected sub-screen is output from the left speaker, and the audio of the selected sub-screen is output from the right speaker. The sound of the main screen is output.

FIG. 3 shows another embodiment of the multi-screen television receiver according to the present invention. One speaker 214b and one earphone 2 instead of two speakers
14c. The other parts are the same as those in the previous embodiment, so the same reference numerals are given and the description is omitted.

According to this configuration, when the audio selection button on the remote controller is off, the video of the main screen is displayed as a moving image, and the video of the child screen is displayed as a frame drop (quasi-moving image).
The main sound of the main screen is output from the earphone 2 through the speaker 214b.
The sub sound of the main screen is output from 14c. When the audio selection button is on, the video of the main screen is displayed as a moving image, the video of the selected sub-screen is displayed as a moving image, the other sub-screens are displayed as still images, and the selected sub-screen is displayed from the earphone. Of the main screen is output from the speaker.

FIG. 4 shows still another embodiment of the multi-screen television receiver according to the present invention. This embodiment is an embodiment in which an input signal source other than a tuner is considered. Here, input signal sources other than the tuner will be described as the external input terminals 285 and 286.

In the first tuner 201, the signal converted into the intermediate frequency signal is amplified by a video intermediate frequency amplifier circuit.
It is detected by the video detection circuit. The output signal and the output signal from the external input terminal 285 are input to the switch 287, and are switched based on the channel selection of the microcomputer 212 and the signal selection control signal a1. In the first tuner 201,
As in the previous embodiment, the control signal a1 is controlled so that a plurality of channels are selected in time division, and the switch 287 is selected so that all input sources are selected in time division.

On the other hand, in the second tuner 202, the signal converted to the intermediate frequency signal is amplified by the video intermediate frequency amplifier circuit and detected by the video detection circuit. The output signal and the output signal from the external input terminal 285 are input to the switch 289, and a specific signal is selectively derived based on the channel selection of the microcomputer 212 and the signal selection control signal b1. The processing after the decoder 204 is the same as in the embodiment of FIG. In addition, with the configuration having such an input signal source, FIGS.
The audio output configuration shown in FIG.

FIG. 5 shows another embodiment of the multi-screen television receiver according to the present invention. FIG. 7 shows a multi-screen of the CRT 211 in this embodiment. In this embodiment, in addition to the embodiment of FIG. 1, an audio output display is provided on a sub-screen of a channel for which audio is output from the speaker 214. Specifically, a switch 291 is further provided after the switch 219 for attaching the channel selection screen marker. One of the switches 291 includes a switch 219
, And a pulse signal from the audio selection screen marker generation circuit 292 is supplied to the other.

An output pulse signal of the audio selection screen marker generation circuit 292 is a horizontal synchronization signal from the decoder 204,
It is created based on a vertical synchronization signal, a clock signal, and a control signal a2 from the channel selection microcomputer 212. As the mark method, a method of superimposing by using a character or a symbol in a frame display or on a screen can be considered.

The output signal of the switch 219 and the output signal of the voice selection screen marker generation circuit 292 are
1 and is switched and output based on a control signal a2 given from the tuning control unit 231 of the tuning microcomputer 212. This control signal a2 outputs only the output of the switch 209 when the voice selection button is off, and outputs the voice selection screen marker generation circuit 2 when the voice selection button is on.
The control is performed so as to synthesize the output signals of 92. Other parts are the same as those of the previous embodiment, and the same reference numerals are given and the description is omitted. According to this embodiment, it is possible to easily recognize which of the plurality of displayed sub-screens the sound of the sub-screen is output from the speaker.

[0032]

As described above, according to the present invention, the contents of the other channels can be easily confirmed by the video and audio while the video of the main screen is displayed as a moving image and the sub-screen is displayed. For example, this is effective when the user wants to listen to the sound of another channel but does not need much video (weather forecast, news, etc.). Also, the decision at the time of tuning is made easier.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing one embodiment of the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the present invention.

FIG. 3 is a circuit diagram showing still another embodiment of the present invention.

FIG. 4 is a circuit diagram showing still another embodiment of the present invention.

FIG. 5 is a circuit diagram showing still another embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of a screen display according to the present invention.

FIG. 7 is an explanatory view showing another example of a screen display according to the present invention.

FIG. 8 is a circuit diagram showing a conventional multi-screen television receiver.

FIG. 9 is a diagram illustrating a screen display example and a memory area shown for explaining the operation of the receiver in FIG. 8;

[Explanation of symbols]

201, 202: Tuner, 203, 204: Decoder, 205: Memory, 206: Write address generator, 207: Read address generator, 208: Synchronous pulse generator, 211: CRT, 217: A / D converter, 218 ... D / A converters, 209, 219 ... switches, 212 ... channel selection microcomputers, 213 ... audio processing circuits, 2
14 speaker, 216 channel selection screen marker generation circuit,
231, a channel selection control unit; 232, a voice control unit; 281, a switch.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-126083 (JP, A) JP-A-4-114576 (JP, A) JP-A-4-282980 (JP, A) JP-A-61- 212177 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5/44-5/45 H04N 5/60

Claims (4)

(57) [Claims] 1. A first decoder for processing a plurality of video signals introduced from a first input signal source, a memory for storing a plurality of video data from the first decoder, and a second input A second decoder for processing a single video signal introduced from a signal source unit, an output from the second decoder being displayed as a main screen on most of a screen, and an output from the memory being displayed on a screen. Display means for partially displaying a plurality of sub-screens; switch means for selecting any one of the audio signals from the first and second input signal source units and providing the selected audio signal to an audio processing unit; controls switched so that the selected one of the specified video signal of the input signal source unit and the switching system as the audio signal of said switch means from said first input signal source portion is selected And further multi-screen television receiver, characterized in that only the video signal and control means for the memory switching control to be updated for the above specified. 2. The apparatus according to claim 1, further comprising a voice selection screen marker generation circuit, wherein said control means includes means for displaying a mark output from said voice selection screen marker generation circuit on a display screen of said designated video signal. The multi-screen television receiver according to claim 1, wherein: 3. An audio separation circuit for separating an audio signal from the second input signal source unit, a first audio signal from the audio separation circuit and a second audio signal from the first input signal source unit . Ru of the audio signal is input to the switch means
Means, and further provided in the control means, for controlling the switch means to control any one of the first and second audio signals.
2. The multi-screen television receiver according to claim 1 , further comprising: means for providing one to the audio processing unit . 4. An audio separation circuit for separating an audio signal from the second input signal source unit, a first audio signal from the audio separation circuit and a second audio signal from the first input signal source unit . Ru of the audio signal is input to the switch means
And means, provided in said control means further controls said switching means given a second audio signal to the audio processing unit
Means for supplying the output of the audio processing unit to the earphone.
2. The multi-screen television receiver according to claim 1, further comprising: