JPH08116521A - Television receiver - Google Patents

Abstract

PURPOSE: To allow even a broadcast station side to control still image recording at a television receiver side. CONSTITUTION: This television receiver is provided with a plural-screen display means 50 including plural memories 51, 52 for displaying simultaneously plural screens PL, PR on a single picture tube 17W and writes and read sequentially video information from the same signal source to/from the plural memories to display an animation image onto plural screens and write of specific video information to one of the plural memories is designated and the succeeding write is inhibited to display the specific still image to one of the plural screens based on the operation of a still image key of a viewer or on a command signal STRB generated on a still image code sent while being multiplexed on the video signal from the broadcast station side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver capable of simultaneously displaying a plurality of screens.

[0002]

As is well known, in the current television standard system (NTSC system), the aspect ratio of the screen is set to 4: 3. In addition, in the newly proposed high definition television (high definition) system,
The aspect ratio is set to 16: 9, and the screen is horizontally longer than the NTSC system.

In recent years, a horizontal screen television receiver, which is commonly referred to as a horizontal TV or a wide TV, that employs a picture tube having an aspect ratio of 16: 9 and is compatible with the NTSC system has come to be commercially available. . And on a wide-screen television, a so-called picture-in-picture (Pi
In addition to the nP) function, a picture out picture (PoP) function is also installed.

[0004] The PinP function is a function for displaying a child screen by superimposing it on the parent screen which is currently being viewed. The child screen has another coarsely sampled corresponding to the size ratio with the parent screen. The video is reduced and displayed via a dedicated memory. In addition, the PoP function is to display three small-screen images in the margins that occur when the aspect-converted 4: 3 image is displayed on one side on a horizontally long screen with an aspect ratio of 16: 9. In addition to the possibility of displaying four moving images on the TV screen, the parent screen is not hidden by the child screen unlike PinP.

[0005]

By the way, in the case of broadcasting a program such as television shopping on television broadcasting, for example, at the broadcasting side, the reception telephone number, the account number of the remittance destination, etc. are set at an appropriate time. However, it is often the case that it is displayed on the screen in a superimpose manner or explained by voice.

Since these display information and audio information are broadcast only for a certain period of time, the viewer generally tries to keep the telephone number or the like by taking a memo.

When the television receiver has the picture-in-picture function and the function of changing the image of the small screen to a still image (small screen still function), as described above. In such a program, the viewer can continuously display the telephone number and the like by switching to the small screen on the television receiver and performing the small screen still.

However, even if the television receiver is equipped with the picture-in-picture function and the small screen still function, there is a problem that the timing is missed if the operation is troublesome. Further, there is a problem that the display information is naturally small on the sub-screen, which makes it difficult to see.

[0009] On the other hand, for example, when broadcasting a program such as television shopping, even if the information is desired to be recorded as a still image by the viewer on the side of the broadcasting station, such as a product image, Still images could not be recorded on the receiving side unless the still key was operated. For this reason, it has been impossible to distribute a TV shopping catalog or the like to viewers through broadcasting.

In view of the above point, the object of the present invention is to allow not only the viewer side but also the broadcasting station side to control the still image recording on the receiver side and to make the recorded still image easy to see. It is an object to provide a television receiving device capable of displaying.

[0011]

In order to solve the above-mentioned problems, the television receiving apparatus according to the present invention has a single image display element 1 when the reference numerals of the embodiments described later correspond to each other.
A television receiver provided with a multi-screen display means 50 for simultaneously displaying a plurality of screens PL, PR on 7W, wherein the multi-screen display means includes a plurality of memories 51, 52 respectively corresponding to the plurality of screens. Video information from the same signal source 11 is sequentially written in the plurality of memories, and the video information written in the plurality of memories is sequentially read to display moving images on a plurality of screens.
The feature is that a specific still image is displayed on one of a plurality of screens by prohibiting writing after specifying writing of specific video information to one of a plurality of memories by a predetermined command signal STRB. It is what

[0012]

According to this structure, by transmitting a predetermined command signal from the broadcasting station side, the broadcasting station side can control the still image recording on the receiver side, and the plurality of screens PL can be displayed. , PR have the same shape, the still image recorded in the memory 52 is easily displayed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the television receiver according to the present invention will be described below. In this embodiment, the closed caption system multiplex information is used on the broadcast station side as a control signal for displaying a still image.

That is, on the broadcast station side, a closed caption type encoder is used to assign a control function for displaying a still image to the control code,
On the receiver side, a still image is displayed on the screen of the television receiver every time the control code is received from the broadcast station side, even if the viewer does not perform any operation.

First, referring to FIG.
The caption method will be described.

[Closed Caption System] The closed caption system is a character multiplex broadcasting system in which characters synchronized with audio are displayed on the screen at the same time as television images, and has been implemented in the United States since 1980. . As a result, the hearing-impaired person can understand and enjoy the television broadcast as well as the normal person. In the United States, since July 1993, it has been legislated to mount a closed caption type decoder on a television receiver of 13-inch or more type.

The number of closed caption broadcast programs has gradually increased since the start, and at present, all the programs provided by the three major networks (CBS, ABC, NBC) in the high viewing time zone at night are closed caption system. Has been broadcast. The programs with closed captions as described above have expanded to cable television broadcasting, and the number of video software that uses tapes and disks as package media with closed captioning subtitles has increased. ing.

In the closed caption system, during the vertical blanking period of the television signal, the character information based on the American standard code for information exchange is superimposed on the odd-numbered field 21H and the even-numbered field 284H is used for the field discrimination. Information is superposed.

In closed captioning, the encoded composite video signal has a 7-cycle sinusoidal clock run-in burst and a binary N-value, as shown in FIG. 4A.
It is composed of the character signal of RZ, and also "1" of the character signal.
And the level of "0" is 50 IRE (50%
White) and 0 IRE (pedestal level). The clock frequency is 32 times the horizontal scanning frequency fH (= 503.4965 kHz), and the cycle of the clock run-in burst is made equal to the clock cycle. After the clock run-in burst, there are 2 bits of logic level "0", and the start code Scd is formed together with the 1-bit start bit S whose logic level is "1".

As shown in FIG. 4B, the data structure of the character signal is a 16-bit (two characters) binary signal of "1" and "0", which is in the NRZ (Non Return to Zero) format.
7-bit code 1 (B1) and code 2 (B
2) and a 1-bit error detection code C added after each code. Therefore, the transmission rate of the closed caption system is 2 characters / frame, that is, 60 characters /
Seconds.

The closed caption display mode includes a caption mode and a text mode. In the caption mode, like the superimposition of a movie, for example, at the bottom of the screen, dialogue, etc. However, up to 32 characters x 4 lines are displayed. In text mode, on the other hand, the maximum is 32 across the entire screen.
Character x 15 lines are displayed and used for weather forecasts and program information.

[Structure of Receiving Device] Next, the television receiving device according to the present invention will be described with reference to FIGS.
An embodiment when applied to a television receiver compatible with the closed caption system will be described.

FIG. 1 shows the overall construction of an embodiment of the present invention, and FIG. 2 shows the construction of the essential parts thereof. In FIG. 1, 1
0 is a video system of a television receiver, and an antenna 1
The broadcast radio wave received at is supplied to the tuner 11, and a broadcast signal of a desired channel is selected. A video IF (intermediate frequency) / demodulation circuit 12 is connected to the tuner 11, and the demodulated video signal is supplied to a video signal processing circuit 13 to be subjected to predetermined signal processing.

The output of the video signal processing circuit 13 is supplied to the video output circuit 16 through the adding circuit 14 and the s-side contact and the movable contact of the changeover switch 15, and this circuit 1
The output of 6 is a wide-angle picture tube 17 having an aspect ratio of 16: 9.
Supplied to W.

Further, the video signal from the IF / demodulation circuit 12 is supplied to the sync separation circuit 18, and the horizontal / vertical sync signals Hsy and Vsy obtained by the separation circuit 18 are converted into the horizontal / vertical deflection circuit 19. The output of the deflection circuit 19 is supplied to the deflection coil 17y. Since the audio system is not related to the present invention, its illustration and description are omitted.

Reference numeral 21 denotes a system control circuit (CPU), which supplies predetermined control signals from the control circuit 21 to the tuner 11 to the video output circuit 16 as shown by the broken line in FIG.

Reference numeral 30 denotes the above-described closed caption type character multiplex information processing system, which includes a character information extracting circuit 31, a decoding circuit 32 and a character information display control circuit 3.
3 is included. The video signal from the IF / demodulation circuit 12 is supplied to the sampling circuit 31, the output of the sampling circuit 31 is supplied to the decoding circuit 32, and the output of the decoding circuit 32 is supplied to the display control circuit 33. Also,
The sync signals Hsy and Vsy from the sync separation circuit 18 are supplied commonly to the sampling circuit 31 and the display control circuit 33. Then, the display control circuit 33 supplies the video signal corresponding to the extracted character information to the adding circuit 14.

The control system 40 is a microcomputer (CP
U) 41, ROM 42, RAM 43, VRAM 44, each of which is connected through a system bus 45. R
The OM 42 stores various control programs in addition to the character information fetch processing program, and also stores data such as fonts used for display. RAM43
Is mainly used as a work area for calculation. The VRAM 44 is used for display.

The extraction circuit 31, the decoding circuit 32, and the display control circuit 33 are connected to the bus 45 via an interface (not shown). The system control circuit 21 is also connected to the bus 45.

Then, for example, an infrared transmission type remote control receiver 46 is connected to the bus 45 via an interface (not shown), and a corresponding remote control transmitter 47.
Allows remote control of the television receiver. The above-described configuration is similar to that of a conventional closed caption television receiver.

In this embodiment, the left and right two screens are displayed in the same shape, unlike the display by the large and small screens such as the picture-in-picture function and the picture-out-picture function described above. Done, 16:
In order to realize a picture-and-picture (P & P) function suitable for a wide-screen television using a picture tube having an aspect ratio of 9, a memory 5 corresponding to each of the left and right screens is provided.
A two-screen display processing circuit 50 including 1, 52 is provided.

The display processing circuit 50 includes an adding circuit 14
And the horizontal / vertical synchronizing signals Hsy and Vsy from the sync separation circuit 18, and a control signal from the system control circuit 21. In the memory 52 of the display processing circuit 50, the strobe signal STRB obtained by decoding the control code on the broadcasting station side is decoded from the decoding circuit 32 through the c-side contact and the movable contact of the changeover switch 53.
Is supplied, and based on the still command of the remote control transmitter 47 through the m-side contact and the movable contact,
The strobe signal STRB is supplied from the control system 40 to record a still image.

The movable contact of the switch 53 is switched to the c-side contact or the m-side contact according to the selection control signal from the control system 40 based on the selection operation between the manual still and the automatic still in the remote control transmitter 47. To be

The output of the display processing circuit 50 is supplied to the video output circuit 16 through the d-side contact and the movable contact of the switch 15.

Further, one memory 5 of the display processing circuit 50.
The image information on the recording medium 2 is transferred to and recorded in an external recording / reproducing device 2 such as a magneto-optical disk device. The video signal reproduced by the device 2 is passed through the p-side contact and the movable contact of the switch 15 to the video output circuit 1
6. As an external recording / playback device,
It is also possible to use a hard disk, a VTR (overshooting), a flash memory or the like.

As shown in FIG. 2, analog input video signals are stored in the memories 51 and 52 corresponding to the left and right screens, respectively.
It is supplied and written through the -D converter 55. Then, in this embodiment, the strobe signal STRB is supplied to the memory 52 corresponding to the right screen.

The video signal data read from both memories 51 and 52 are supplied to compression / synchronization circuits 56 and 57 corresponding to the left and right screens, respectively, and the sync separation circuit 1 is also provided.
Horizontal / vertical synchronizing signals Hsy and Vsy from 8 are commonly supplied to the compressing / synchronizing circuits 56 and 57. The outputs of the compression / synchronization circuits 56 and 57 are passed through the OR gate 58 to D-
It is supplied to the A converter 59, converted into an analog video signal, and led to the d-side contact of the switch 15.

[Operation of Receiving Device] Next, with reference to FIG. 3, recording and display of a still image according to an embodiment of the present invention will be described.

When the change-over switch 15 is in the connected state as shown in FIG. 1, the dual-screen display processing circuit 50 causes the same television broadcast program from an arbitrary broadcast station to be displayed on the screen surface of the picture tube 17W. For example, the left and right screens having the same shape are displayed with an aspect ratio of 4: 3.

In the embodiment of FIG. 1, the strobe signal STRB is supplied to the memory 52 corresponding to the right screen, but until the strobe signal is actually supplied,
The same television broadcast program is displayed as a moving image on both the left and right screens of the picture tube 17W.

In order to set a specific screen in this broadcast program as a still image, when the viewer selects the manual still on the remote control transmitter 47, according to this selection operation,
A control signal from the control system 40 is supplied to the switch 53, and its movable contact is switched to the m-side contact as shown in the figure.

When the viewer operates the still key (not shown) of the remote control transmitter 47 at any time, the strobe signal STRB is supplied to the memory 52 in response to this operation, whereby the still key The video data corresponding to the specific screen in the broadcast program designated by the operation is stored in the memory 5
2 is written into the memory 52, and writing of video data thereafter is prohibited in the memory 52. As a result, as shown in FIG. 3, the moving image mv is displayed in real time on the left screen PL on the tube surface SCw of the picture tube 17W, and the desired still image st continues on the right screen PR. Is displayed.

For example, when a television shopping program is being broadcast, the reception telephone number and the price of the product are displayed as a still image, and when a cooking program is being broadcast, a recipe is displayed as a still image. To be done. When the travel program is broadcast, a tourist guide or the like is displayed as a still image. Since the still image information on the memory 52 is transferred to the external recording / reproducing apparatus 2 and recorded as described above, it can be reproduced and used at any time.

On the other hand, on the screen that the broadcasting station wants the viewer to record as a still image, the control function for displaying a still image is assigned to the control code of the closed caption system as described above. The signal is multiplexed and broadcast. On the receiver side, the character information extracting circuit 31 of the character multiplex information processing system 30 extracts the character information from the demodulated video signal, and the decoding circuit 32 decodes the extracted character information to obtain the strobe signal STRB. Is played.

The viewer uses the remote control transmitter 47 to
When the automatic still is selected, the selection control signal as described above is supplied to the switch 53, the movable contact thereof is switched to the c-side contact contrary to the illustration, and the reproduction strobe signal STRB is supplied to the memory 52. Then, the video data corresponding to the screen to which the still image code in the broadcast program is added is written in the memory 52, and the subsequent writing of the video data in the memory 52 is prohibited. This allows
As shown in FIG. 3, the moving image mv is displayed in real time on the left screen PL on the tube surface SCw of the picture tube 17W, and the right screen PR has a predetermined stillness, even if the viewer does not perform any operation. The image st is continuously displayed.

For example, when a television shopping program is broadcast, the image of the product itself is also broadcasted in addition to the reception telephone number and the price of the product, but if the image of the product itself is also recorded as a still image on the receiving side. Since it is effectively used as a catalog, the broadcast station may give a still image code to a plurality of screens in the program.

Therefore, it is desirable that the capacity of the memory 52 be large enough to handle a plurality of still images. Alternatively, each time the still image code is received, the video data of the old screen written in the memory 52 is transferred to the external recording / reproducing apparatus 2 and then the video data of the new screen is written in the memory 52. Good.

In the above-described embodiment, a specific screen designated based on the operation of the still image key by the viewer or the addition of the still image code on the broadcasting station side has the same shape as the moving image as a still image. , Can be displayed in an easy-to-see manner.

In addition, a closed caption type decoder, which is indispensable in the United States, is used for the transmission of the still picture code given by the broadcasting station.
The two-screen display processing circuit for realizing the AND-picture function is also equipped with the picture-in-picture function or the picture
Since the cost is not particularly high as compared with the circuit for the out picture function, it can be realized at a cost not much different from that of the conventional television receiver.

[Other Embodiments] In the above-described embodiment, a specific image is recorded as a still image from a series of videos of a broadcast program.
By inserting an identification code with a frame-independent image and decoding this identification code on the receiver side, only the television receiver equipped with the picture and picture function can broadcast on one screen. The program can be displayed as a moving image, and an image independent of only one frame can be displayed as a still image on the other screen. It should be noted that in the conventional television receiver, even if an independent video image is inserted in only one frame, it is not recognized by the viewer.

On the other hand, in the closed caption text mode, a maximum of 32 characters × 15 lines is displayed on the entire screen as described above. In this text mode, a still image code is added to each screen from the broadcasting station side, and, for example, electronic newspaper information is transmitted at midnight. By sequentially recording the information of the electronic newspaper, the electronic newspaper recorded in the magneto-optical disk device can be reproduced the next morning, and the latest information can be known promptly.
When recording the information in the electronic newspaper, the video output circuit, the deflection / high-voltage circuit, and the audio system of the television receiver are inactive.

In each of the above-described embodiments, the case where a still image is recorded by the television receiver equipped with the picture and picture function has been described.
The same can be applied to a television receiver equipped with an in picture function or a picture out picture function. In this case, by playing back the recorded still image using an external recording / playback device,
The difficulty of seeing on a small screen is eliminated.

Further, in each of the above-described embodiments, the case where the present invention is applied to the television receiver compatible with the closed caption system has been described, but the present invention is also applicable to the television receiver compatible with the character multiplex broadcasting of another system. , Can be applied as well.

In each of the above-described embodiments, the broadcast program is used as a signal source for still image recording. For example, by using a VTR as a signal source, the index of the video tape owned by the viewer is produced. You can also

[0055]

As described above, according to the present invention, a television having a plurality of screen display means including a plurality of memories for simultaneously displaying a plurality of screens on a single image display element. In the receiving device, video information from the same signal source is sequentially written into a plurality of memories and sequentially read out to display moving images on a plurality of screens, and based on a predetermined operation by a viewer, or , Writing after specifying writing of specific video information to one of a plurality of memories by a predetermined command signal generated based on a predetermined signal multiplexed and transmitted from the broadcasting station side Since it is prohibited to display a specific still image on one of a plurality of screens, the broadcasting station can control the still image recording on the television receiver side.
Character display information and specific image information in broadcast programs can be easily stored, and electronic catalogs and the like can be distributed by broadcasting.

Further, since the predetermined signal transmitted from the broadcasting station side is detected by the character multiplex broadcasting decoder which is indispensable in the US television receiver, the economical burden is lightened on both the broadcasting station side and the receiving side. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a television receiving apparatus according to the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of an embodiment of the present invention.

FIG. 3 is a conceptual diagram for explaining the operation of one embodiment of the present invention.

FIG. 4 is a conceptual diagram for explaining the present invention.

[Explanation of symbols]

 10 video system 21 system control circuit (CPU) 30 character multiplex information processing system 31 character information extraction circuit 32 decoding circuit 33 character information display control circuit 40 control system 41 CPU 46 remote control receiver 47 remote control transmitter 50 two-screen display processing circuit 51 Left screen memory (for moving images) 52 Right screen memory (for still images) 53 Changeover switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04N 5/262 7/025 7/03 7/035

Claims (7)

[Claims] 1. A television receiver comprising a multi-screen display means for simultaneously displaying a plurality of screens on a single image display element, wherein the multi-screen display means comprises a plurality of screens respectively corresponding to the plurality of screens. The video information from the same signal source is sequentially written to the plurality of memories, and the video information written to the plurality of memories is sequentially read to display a moving image on the plurality of screens. At the same time, by prohibiting writing after designating writing of specific video information to one of the plurality of memories by a predetermined command signal, a specific still image is displayed on one of the plurality of screens. A television receiver characterized by the above. 2. The television receiver according to claim 1, wherein the plurality of screens are displayed in the same shape on the single image display element. 3. The television receiver according to claim 1, wherein the predetermined command signal is generated based on a predetermined operation by a viewer. 4. The television receiving apparatus according to claim 1, wherein the signal source is a television broadcast program, and the predetermined command signal is multiplexed with a video signal and transmitted from the broadcasting station side. . 5. The specific video information is video information in which only one frame is independent in the television broadcast program, and the predetermined command signal is generated based on an identification signal from a broadcasting station side. Item 5. The television receiver according to Item 4. 6. The video information written in one of the plurality of memories is updated for each designation when the designation of the specific video information is performed a plurality of times. Television receiver. 7. When the specific video information is designated a plurality of times and the video information written in one of the plurality of memories is updated for each designation, the updated video information is externally read. The television receiver according to claim 6, wherein the television receiver is sequentially transferred to and recorded by the recording means.