KR0164562B1 - Simultaneous viewing apparatus of tv and caption information - Google Patents

Abstract

In the character information processing television with a PIP function, it is possible to simultaneously view a TV signal and a character information screen of the same channel, thereby eliminating the problem of not being able to simultaneously view the character information and the TV signal of the same channel at the same time.

To this end, it is provided with two tuners capable of independently tuning the broadcast signal, and signal selection means for switching and selecting the TV signal tuned by the tuner and the text information video signal output from the text information processing block, and the signal A microcomputer for controlling the switching operation of the selection means to apply an appropriate TV signal and text information video signal to each processing block enables simultaneous viewing of TV signals and text information screens broadcast on one channel.

Description

Simultaneous viewing of TV and text information

1 is a block diagram of an apparatus of the present invention.

2 is a switching control table of the video switch unit of the present invention.

3 is a screen display state diagram for each case of FIG.

* Explanation of symbols for main parts of the drawings

10: distributor 20: first tuner

21: second tuner 30: the first intermediate frequency processing unit

31: second intermediate frequency processor 40: video switch unit

50: main video processing unit 60: PIP processing unit

70: character information processing block 71: character information processing unit

72: video encoder 73: switch unit

80: switch unit 90: microcomputer

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a television and text information simultaneous viewing apparatus for displaying a television (TV) signal and text information in a PIP mode in a character information processing television with a picture in picture (PIP) function. TV signal and text information screen through the PIP screen to be able to watch in real time at the same time.

Conventional technology for viewing a TV signal and text information on a PIP screen is described in patent application No. 88-16612 (PIP built-in text multicast TV, filed December 12, 1988), filed by the present applicant. The IF signal tuned at is applied to the intermediate frequency processing unit, and the output signal of the intermediate frequency processing unit is applied to one terminal of the first switching element and simultaneously to the teletext unit, and the output signal of the teletext unit is transmitted through the encoder. The switching signal output of the first switching element is applied to one terminal of the second switching element, and the video signal is applied to the other terminal of the second switching element, and the switching of the second switching element The signal output is applied to the Y / C processor and the PIP processor to be processed and then the outputs of the Y / C processor and the PIP processor are 3 is selected in the switching element is configured to be applied to the CRT drive stage.

This prior art is applied to one terminal of the first switching element, which is tuned by the tuner and processed by the intermediate frequency processing unit, and is applied to the teletext unit to extract the character information in the composite video signal into the character information RGB signal. The character information RGB signal filed by the teletext unit is encoded and then output as a composite video signal and applied to the other terminal of the first switching device.

In the first switching device, the composite video signal (broadcast information) applied by the intermediate frequency processing unit and the composite video signal (text information) applied by the encoder are switched and applied to one terminal of the second switching device. The switching operation is performed by the switching control signal output from the teletext unit.

An external video signal is applied to the other terminal of the second switching device to which the composite video signal selected by the first switching device is applied to one terminal, and is appropriately selected as a switching control signal of the microcomputer and applied to the Y / C processor and the PIP processor.

The RGB signal processed by the Y / C processor and the PIP processor is selected by switching in the third switching device and applied to the CRT drive stage. The switching operation of the third switching device is performed by the switching control signal output from the PIP processor. .

However, the above-described conventional technique is configured to switch the TV signal with the video signal made by the first text element in the teletext section and then switch with the external video signal in the second switching element. It was not possible to display teletext text signals independently and simultaneously.

In other words, the external video signal and the teletext character information can be displayed simultaneously in the PIP mode, but the TV signal and the teletext character signal cannot be displayed at the same time. It was not.

Japanese Laid-Open Patent Publication No. 58-165488 discloses a technique for displaying a TV signal and a broadcast program index table on a PIP screen according to an index key input, but the Japanese reference mentioned above stores the program index table in advance and displays it. As a result, it was not possible to display the TV signal and the program index table in real time.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an apparatus for simultaneously displaying a TV signal and text information on a screen in PIP mode in order to achieve the above object. Two broadcast signal tuning means for tuning to each channel by independent tuning data, one of two TV signals tuned by the broadcast signal tuning means is selected and applied to the text information processing block and output from the text information processing block. And a signal selecting means for switching the TV signal tuned by the broadcasting information selecting means and the broadcasting signal selecting means, and controlling the switching operation of the signal selecting means so that the main video processing part, the PIP processing part, and the text information processing block Comprising control means for applying one of the character information video signals The.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a system configuration diagram of the present invention, in which a broadcast signal is received through an antenna ANT and distributed in the distributor 10, and then applied to the first tuner 20 and the second tuner 21, respectively.

The first tuner 20 and the second tuner 21 receive tuning data (DATE, CLOCK, ENABLE) applied from the microcomputer 90 to tune one channel. Here, two tuners 20 and 21 are tuned. The reason for this is to simultaneously view TV signals and text information of the same channel on a PIP screen.

The intermediate frequency signal tuned by the first tuner 20 and the second tuner 21 is applied to the first intermediate frequency processor 30 and the second intermediate frequency processor 31, respectively, and the TV signal TV1 as a composite video signal. And outputs TV2.

The TV signals TV1 and TV2 are connected to the main video processor 50, the PIP processor 60, and the text information processing block 70 according to the switching operation of the video switch unit 40, respectively. (VID3).

The video signal VID3 selected by the video switch unit 40 and applied to the character information processing block 70 is applied to the character information processing unit 71 and applied to the external input character information applied to the external data transmission line RS232C. Character information is later extracted and applied to the video encoder 72 as an RGB signal.

At this time, the character information processing unit 71 separates the horizontal and vertical synchronization signals H and V and applies them to the video encoder 72 so that the video encoder 72 outputs the final composite video signal VID4.

The video signal VID4 output from the video encoder 72 and the video signal VID3 selected by the video switch unit 40 are respectively applied to the switch unit 73 to switch the control signal BSW of the character information processing unit 71. It is configured to be applied to the video switch unit 40 by the character video signal (TTXVID) by being selected as.

Therefore, the video switch unit 40 switches the TV signal TV1 (TV2) and the text video signal TTXVID to the control signals S1 (S2) and S3 of the microcomputer 90 to select the main video processing unit 50. And the PIP processing unit 60 and the character information processing block 70.

At this time, the video switch unit 40 is switched by the control signals S1, S2, and S3 of the microcomputer 90 so that the main video processing unit 50 switches one of the TV signal TV1 and the text video TTXVID. Select and apply one of the TV signal TV2 and the text video signal TTXVID to the PIP processing unit 60, and select one of the TV signals TV1 and TV2 as the text information processing block 70 It is configured to apply.

The main video processor 50 processes the video signal VID1 selected by the video switch unit 40 and applies the main RGB signal MR.GB to the switch unit 80 while maintaining the main horizontal and vertical synchronization signals MH. The MV is separated and applied to the PIP processing unit 60.

The PIP processing unit 60 processes the video signal VID2 into the control signal PIPC of the microcomputer 90 and applies the PIP RGB signal PR.GB to the switch unit 80 while switching the switching signal MSSW. It applies to the part 80.

In the switch unit 80, the MR.G.B signal of the main video processing unit 50 and the PR.G.B signal of the PIP processing unit 60 are switched to the switching signal MSSW to be applied to the CRT drive terminal as the final R.G.B signal.

Here, the microcomputer 90 recognizes key input data of the user and outputs a control signal to each block of the system.

The present invention configured as described above processes text information such as teletext that superimposes text information on a TV signal or text information processing such as video information applied from the outside through a data transmission line RS232C. The main purpose of the present invention is to combine the function and the PIP processing function by two tuners to display the character information such as teletext or videotex on the PIP screen as a video, and to broadcast the character information as in the conventional case. When watching a broadcasting channel, there was a problem that only one screen of a TV video or a text information video could be viewed. In the present invention, a TV screen and a text information screen can be freely viewed on the same broadcasting channel by using the main screen and sub-screen of the PIP. It is to make it possible.

Hereinafter, the present invention will be described in detail.

The broadcast signal RF received through one antenna ANT is distributed by the distributor 10 and then applied to the first tuner 20 and the second tuner 21.

Here, the first tuner 20 and the second tuner 21 operate by receiving independent tuning data from the microcomputer 90, and detect the intermediate frequency signal of the broadcast signal to detect the first intermediate frequency processor 30 and the second intermediate. It is applied to the frequency processor 31.

Since the microcomputer 90 applies the tuning data to the first tuner 20 and the second tuner 21 according to the channel data selected by the user, the intermediate frequency selected by the first tuner 20 and the second tuner 21. The signal can be the same channel or a different channel.

That is, the tuners 20 and 21 may tune to different channels or tune to the same channel.

The intermediate frequency signal tuned by the first tuner 20 and the second tuner 21 is applied to the first intermediate frequency processor 30 and the second intermediate frequency processor 31 to be a composite video signal. Is applied to the video switch unit 40 by TV2.

At this time, the TV signals TV1 and TV2 may be different channels (TV1 and TV2 are different broadcast channels) according to the tuning data output from the microcomputer 90 and may be the same channel (TV1 and TV2 are the same broadcast channel). It may be.

In addition, the TV signals TV1 and TV2 output from the first intermediate frequency processor 30 and the second intermediate frequency processor 31 are video switches by the control signals S1, S2, and S3 of the microcomputer 90. The switching unit 40 selects the switching operation (the switching operation of the video switch unit 40 will be described later). Each block 70 is applied.

The video signal VID3 selected by the video switch unit 40 and applied to the character information processing block 70 is applied to the character information processing unit 71 to extract the character information in the video signal, and then to the video encoder as an RGB signal. 72 is applied to the video encoder 72, one end of the switch unit 73 as the final composite video signal (VID4) by using the RGB signal and the horizontal and vertical synchronization signal (H) (V) in the character information processing unit (71) To the terminals.

The video signal VID3 selected by the video switch unit 40 is applied to another terminal of the switch unit 73, and the switch unit 73 is switched by the switching control signal BSW generated by the character information processing unit 71. The video signal VID3 and VID4 are appropriately switched to be applied to the video switch unit 40 as a text video signal TTXVID.

The main video processing unit 50 to which the video signal VID1 selected by the control signal S3 of the microcomputer 90 is applied in the video switch unit 40 processes the video signal VID1 to perform the final video signal MR. GB) is outputted to the switch unit 80 while the horizontal and vertical synchronization signals MH (MV) of the video signal VID1 are separated and applied to the PIP processing unit 60.

That is, the main video processor 50 processes the video signal constituting the main screen.

In the video switch unit 40, the PIP processing unit 60 to which the video signal VID2 selected by the control signal S2 of the microcomputer 90 is applied receives the video signal VID2 by the ratio of the sub-screen to the main screen. Compresses the video signal and outputs the video signal PR.GB to be displayed at a specific position on the main screen to the switch unit by the horizontal and vertical synchronization signals MH (MV) applied from the main video processing unit 50. Let's go.

The main video signal MR.GB output from the main video processing unit 50 and the PIP video signal PR.GB output from the PIP processing unit 60 are switched from the switch unit 80 to a main screen and a sub-screen. The switching operation of the switch unit 80 is performed by the switching signal MSSW output from the PIP processing unit 60.

On the other hand, the character information processing block 70 is input to the RS232C serial bus and the character information superimposed on the vertical blanking section of the video signal VID3 selected by the video switch unit 40 by the control signal S1 of the microcomputer 90. The character information of the videotex is received as an input, and the character information processing unit 71 selects one of the two character information and processes the information by the control signal TXTC applied by the microcomputer 90.

At this time, the control signal TXTC applied by the microcomputer 90 to the text information processing unit 71 determines the processing function of the text information processing unit 71 and separates the video RGB from the horizontal and vertical synchronization signals H and V. The video encoder 72 is applied to the video encoder 72.

That is, when processing the character information carried on the video signal VID3, the character information processing unit 71 generates the switching signal BSW and applies it to the switch unit 73 so that the switch unit 73 outputs the video encoder 72. The selected video signal VID3 and the video signal VID3 selected by the video switch unit 40 are switched to be applied to the video switch unit 40.

As a result, the switch unit 73 superimposes the video signal VID4, which is a text information signal, on the video signal VID3 by the switching signal BSW, and outputs the video signal TTXVID.

However, when processing the character information input through the RS232C serial bus video signal (VID4) which is a character information signal from the video encoder 72 by using the horizontal and vertical synchronization signal (H) (V) made by the character information processing unit 71 ) And then the switching signal BSW is applied to the switch unit 73 so that the video signal VID4 is immediately outputted as the text video signal TTXVID without overlapping with the video signal VID3.

On the other hand, the microcomputer 90 receives the data input by the user to generate an appropriate control signal at the request of the user and apply it to each functional block of the present invention.

In this case, the switching control of the video switch unit 40 is performed by the control signals S1, S2, and S3 applied by the microcomputer 90, according to the combination of the control signals S1, S2, and S3. The control results are shown in the switching control table of FIG.

That is, as shown in the table, the video switch unit 40 is possible in eight cases, and the screen display state of each case is shown in FIG.

The video signals applied to the main video processing unit 50, the PIP processing unit 60, and the character information processing block 70 according to the control conditions of CASE 0 to CASE 7 shown in FIG. Shown in

In addition, the screen configuration for each component displayed in the table of FIG. 2 is as shown in FIG.

As shown in the screen composition of each case, the condition of CASE 0 to CASE 4 should be generated when viewing the normal PIP screen. In this case, the change of the main screen and the sub-screen is performed by the tuning data (T1) (T2) of the microcomputer 90. May be changed to change the reception channel of the first tuner 20 and the second tuner 21.

In addition, when the main screen is the TV signal TV1 and the sub screen is the character video signal TTXVID of the TV signal TV2 in the TV signal TV2, the control signals S1 (S2) and S3 of CASE 6 (S3). In this case, the control signal TXTC of the microcomputer 90 should apply data to the character information processing unit 71 to perform the character processing function in the character information processing unit 71.

In addition, when the TV signal TV1 of the main screen and the character video signal TTXVID screen of the subscreen are to be changed, a control signal of CASE 5 is generated and applied to the first tuner 20 and the second tuner 21. The channel may be changed using the tuning data T1 and T2 of the microcomputer 90.

In this case, the current tuning state of the two tuners is changed only when the main and sub-switches are performed while the current channel of the main screen and the sub-screen are different from each other. In this case, CASE0, CASE1, CASE4, and CASE6.

On the other hand, when the main screen is used as the TV signal TV1 and the sub screen is displayed as the character video signal TTXVID of the TV signal TV1, the control signals S1, S2, and S3 of CASE 2 may be generated.

That is, when the control signals S1, S2, and S3 of CASE 2 are generated, the TV screen and the text information screen can be simultaneously viewed in real time using the main screen and the sub-screen in the same channel.

In order to display the main screen and the sub-screen as a character video signal (TTXVID) of one channel, the control signals S1, S2, and S3 of CASE 3 and CASE 7 may be generated.

As described above, the present invention solves the disadvantage that the main screen and the sub-screen are switched only to TV and text information on the same channel, so that the TV signal and text information of the same channel can be simultaneously viewed in real time. While reducing the boredom of the user according to the effect that can conveniently access a variety of information.

Claims (4)

The broadcast signal tuning means for tuning the TV broadcast signal into two channels by the independent tuning data of the microcomputer and one of the two TV signals tuned by the broadcast signal tuning means are selected and applied to the text information processing block. A signal selecting means for switching and selecting the character information video signal outputted from the information processing block and the TV signal tuned by the broadcasting signal selecting means, and controlling the switching operation of the signal selecting means to control the main video processor, the PIP processor, and the character information processing block. And a control means for selecting and applying one of a TV signal and a text information video signal. 2. The apparatus of claim 1, wherein the broadcast signal selecting means comprises: a first tuner and a second tuner which independently tune to different channels or the same channel by receiving tuning data of a microcomputer through a broadcast signal applied through a distributor; And a first intermediate frequency processor and a second intermediate frequency processor for outputting the intermediate frequency signal selected by the second tuner as a composite video signal. The control unit of claim 1, wherein the signal selecting means uses a TV signal TV1 (TV2) processed by the first intermediate frequency processing unit and the second intermediate frequency processing unit and the character information video signal processed by the character information processing block as a control signal of the microcomputer. And a video switch unit configured to apply a video signal to the main video processing unit, the PIP processing unit, and the text information processing block by switching selection. The video switch unit of claim 3, wherein the video switch unit applies one of the TV signal TV1 and the text information video signal to the main video processing unit, and applies one of the TV signal TV2 and the text information video signal to the PIP processing unit. And a signal of one of the TV signals TV1 and TV2 is applied to the text information processing block.