JP3573166B2 - Television receiving apparatus and television receiving system - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a television receiving apparatus and a television receiving system capable of simultaneously displaying a plurality of screens.
[0002]
[Prior art]
As is well known, in the current television standard system (NTSC system), the aspect ratio of the screen is set to 4: 3.
In the newly proposed high-definition television (hi-vision) system, the aspect ratio is set to 16: 9, and the screen is wider than the NTSC system.
[0003]
2. Description of the Related Art In recent years, television receivers that adopt a picture tube with an aspect ratio of 16: 9 and that are compatible with the NTSC system and have a wide screen, commonly referred to as a horizontal TV or a wide TV, have been marketed.
The wide-screen television has a picture-out-picture (PoP) function in addition to a so-called picture-in-picture (PinP) function.
[0004]
The PinP function is a function of displaying a child screen over the parent screen that is currently being viewed. In the child screen, another image roughly sampled according to the size ratio with the parent screen is displayed. The image is reduced and displayed via a dedicated memory.
Further, the PoP function displays three small-screen images in a blank portion generated when an aspect-converted 4: 3 image is displayed on one side on a landscape screen with an aspect ratio of 16: 9. In addition, four moving images can be displayed on the television screen, and the parent screen is not hidden by the child screen unlike PinP.
[0005]
[Problems to be solved by the invention]
By the way, in the case of broadcasting a program such as television shopping, for example, in a television broadcast, the broadcasting side displays the reception telephone number and the account number of the remittance destination on the screen in a superimposed manner for an appropriate time. Often, the explanation is given by voice.
[0006]
Since these display information and audio information are broadcast only for a certain period of time, viewers generally take notes and try to keep their telephone numbers and the like at hand.
[0007]
If the television receiver has a picture-in-picture function and a function that can convert a still image of a small screen (small screen still function), the above-described program At times, the viewer can switch to a small screen using a television receiver and still display a small screen, thereby enabling continuous display of a telephone number or the like.
[0008]
However, even if the television receiver has a picture-in-picture function and a small-screen still function, there is a problem that the timing is missed if the operation is troublesome.
In addition, naturally, there is a problem that the display information is small on the small screen, making it difficult to see.
[0009]
On the other hand, for example, when broadcasting a program such as a television shopping, the broadcast station side, even if it is information that the viewer wants to record as a still image on the viewer side, such as an image of a product, requires the viewer to use a still key. Unless was operated, the still image could not be recorded on the receiving side. For this reason, it has been impossible to distribute television shopping catalogs and the like to viewers through broadcasting.
[0010]
In view of such a point, an object of the present invention is to enable not only a viewer side but also a broadcasting station side to control still image recording on a receiver side and to display a recorded still image in an easy-to-view manner. Can be. A television receiver and a television receiving system are provided.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a television receiver according to the present invention includes:
A television receiver for receiving a television broadcast signal in which a still image display command signal is multiplexed with a video signal,
Demodulation means for receiving the television broadcast signal and demodulating a video signal from the received television broadcast signal;
Display means for displaying an image based on the video signal demodulated by the demodulation means on a display screen,
Image information storage means for storing a plurality of image information to be displayed in each divided region when the display region of the display screen is divided,
Extracting means for extracting the still image display command signal multiplexed with the video signal,
In the image information storage means, a video signal demodulated by the demodulating means, the divided writes converted to a size corresponding to each display area, the plurality of images written in the image information storage unit Reading the information, and displaying all of the plurality of pieces of image information as one screen on the display screen , wherein one of the plurality of pieces of image information to be displayed in the divided area is extracted by the extraction means. and it said still picture display command signal to a particular screen in a video signal more designated for display as a still image, after a particular screen in a video signal which is designated by a command signal for the still image display And a multi-screen display processing means for setting image information in which writing of the demodulated video signal is prohibited .
[0012]
[Action]
According to this configuration, by transmitting a predetermined command signal from the broadcast station side, the broadcast station side can control the still image recording on the receiver side, and can display a plurality of screens PL and PR. With the same shape, the still image recorded in the memory 52 is displayed in an easily viewable manner.
[0013]
【Example】
Hereinafter, an embodiment of the television receiver according to the present invention will be described. In this embodiment, a broadcast station uses multiplexed information of a closed caption system as a control signal for displaying a still image.
[0014]
That is, on the broadcast station side, by utilizing a closed caption type encoder and assigning a control function for displaying a still image to the control code, on the receiver side, even if the viewer does not particularly operate, Each time a control code is received from the broadcast station, a still image is displayed on the screen of the television receiver.
[0015]
First, a closed caption method will be described with reference to FIG.
[0016]
[Closed caption method]
The closed caption system is a text multiplex broadcasting in which characters synchronized with sound are displayed on a screen at the same time as television images, and has been implemented in the United States since 1980. Thereby, a hearing-impaired person can understand and enjoy television broadcasting similarly to a healthy person.
In the United States, since July 1993, it has been legislated to mount a closed caption decoder on television receivers of type 13 or larger.
[0017]
The number of closed caption broadcast programs has been increasing gradually since its inception, and at present, all programs provided by the three major networks (CBS, ABC, and NBC) in the high-rated night time zone are closed caption broadcasts. Has become.
The programs with closed captions described above are expanding to cable television broadcasting, and more and more video software that uses tape or disk as package media is also equipped with closed captioned subtitles. ing.
[0018]
In the closed caption method, during the vertical blanking period of the television signal, character information based on the U.S. standard code for information exchange is superimposed on the 21H of the odd field, and information for field discrimination is written on the 284H of the even field. Are superimposed.
[0019]
In the closed caption, as shown in FIG. 4A, the encoded composite video signal is composed of a clock run-in burst having a 7-cycle sinusoidal waveform and a binary NRZ character signal. The levels of "1" and "0" are 50 IRE (50% white) and 0 IRE (pedestal level), respectively. The clock frequency is set to 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 two bits of the logic level "0", and the start code Scd is formed together with the one-bit start bit S having the subsequent logic level of "1".
[0020]
As shown in FIG. 4B, the data structure of the character signal is a binary signal of 16 bits (for two characters) “1” and “0”, and is in NRZ (Non Return to Zero) format, and each of the 7 bits has It consists of a code 1 (B1) and a code 2 (B2), 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 / sec.
[0021]
Also, the closed caption display mode includes a caption mode and a text mode.In the caption mode, for example, at the bottom of the screen, dialogues and the like are maximum like a movie superimpose. Displays 32 characters × 4 lines.
On the other hand, in the text mode, a maximum of 32 characters × 15 lines are displayed over the entire screen, and are used for weather forecast, program information, and the like.
[0022]
[Configuration of Receiver]
Next, an embodiment in which the television receiver according to the present invention is applied to a television receiver compatible with a closed caption system will be described with reference to FIGS.
[0023]
FIG. 1 shows the entire configuration of an embodiment of the present invention, and FIG.
In FIG. 1, reference numeral 10 denotes a video system of a television receiver. A broadcast wave received by an antenna 1 is supplied to a 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, where predetermined signal processing is performed.
[0024]
The output of the video signal processing circuit 13 is supplied to the video output circuit 16 through the addition circuit 14 and the s-side contact and the movable contact of the changeover switch 15, and the output of the circuit 16 is output to a wide-angle lens having a 16: 9 aspect ratio. It is supplied to the picture tube 17W.
[0025]
Further, the video signal from the IF / demodulation circuit 12 is supplied to the synchronization separation circuit 18, and the horizontal / vertical synchronization signals Hsy and Vsy obtained by the separation circuit 18 are supplied to 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, illustration and description are omitted.
[0026]
Reference numeral 21 denotes a system control circuit (CPU) which supplies predetermined control signals from the control circuit 21 to the tuner 11 or the video output circuit 16 as shown by broken lines in FIG.
[0027]
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 33. The video signal from the IF / demodulation circuit 12 is supplied to a sampling circuit 31, an output of the sampling circuit 31 is supplied to a decoding circuit 32, and an output of the decoding circuit 32 is supplied to a display control circuit 33.
Further, the synchronization signals Hsy and Vsy from the synchronization separation circuit 18 are supplied to both the sampling circuit 31 and the display control circuit 33. Then, a video signal corresponding to the extracted character information is supplied from the display control circuit 33 to the addition circuit 14.
[0028]
The control system 40 includes a microcomputer (CPU) 41, a ROM 42, a RAM 43, and a VRAM 44, and each is connected through a system bus 45.
The ROM 42 stores various control programs in addition to the character information fetching processing program, and also stores data such as fonts used for display. The RAM 43 is mainly used as a work area for calculations. The VRAM 44 is used for display.
[0029]
The above-described sampling circuit 31, decoding circuit 32, and 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.
[0030]
For example, an infrared transmission type remote control receiver 46 is connected to the bus 45 via an interface (not shown), and a remote control of the television receiver can be performed by a corresponding remote control transmitter 47.
The configuration as described above is the same as that of a conventional closed caption television receiver.
[0031]
In this embodiment, unlike the display using large and small screens, such as the picture-in-picture function and the picture-out-picture function, as described above, the left and right screens are displayed in the same shape, 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 16: 9, a two-screen display processing circuit 50 including memories 51 and 52 respectively corresponding to left and right screens. Is provided.
[0032]
The display processing circuit 50 is supplied with the video signal from the addition circuit 14 and the horizontal and vertical synchronization signals Hsy and Vsy from the synchronization separation circuit 18, and is also supplied with a control signal from the system control circuit 21. You.
The memory 52 of the display processing circuit 50 is supplied with the strobe signal STRB in which the control code of the broadcast station is decoded from the decoding circuit 32 through the c-side contact and the movable contact of the changeover switch 53, A strobe signal STRB from the control system 40 based on a still command of the remote control transmitter 47 is supplied through the and the movable contact, and a still image is recorded.
[0033]
The movable contact of the switch 53 is switched to the c-side contact or the m-side contact according to a selection control signal from the control system 40 based on a selection operation between manual still and automatic still in the remote control transmitter 47.
[0034]
Then, 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.
[0035]
Further, the image information on one memory 52 of the display processing circuit 50 is transferred and recorded to an external recording / reproducing device 2 such as a magneto-optical disk device. The video signal reproduced by the device 2 is supplied to the video output circuit 16 through the p-side contact and the movable contact of the switch 15.
It should be noted that a hard disk, a VTR (exposure shooting), a flash memory, or the like can be used as the external recording / reproducing device.
[0036]
As shown in FIG. 2, analog input video signals are supplied to and written into the memories 51 and 52 corresponding to the left and right screens through the A / D converter 55.
In this embodiment, the strobe signal STRB is supplied to the memory 52 corresponding to the right screen.
[0037]
The video signal data read from the memories 51 and 52 are supplied to compression / synchronization circuits 56 and 57 corresponding to the left and right screens, respectively, and the horizontal / vertical synchronization signals Hsy and Vsy from the synchronization separation circuit 18 are provided. Are commonly supplied to the compression / synchronization circuits 56 and 57. Outputs of the compression / synchronization circuits 56 and 57 are supplied to a DA converter 59 through an OR gate 58, converted into an analog video signal, and led out to a d-side contact of the switch 15.
[0038]
[Operation of receiving device]
Next, still image recording and display according to an embodiment of the present invention will be described with reference to FIG.
[0039]
When the changeover switch 15 is in the connection state as shown in FIG. 1, the same television broadcast program from an arbitrary broadcast station is displayed on the screen of the picture tube 17W by the two-screen display processing circuit 50, for example. : The left and right screens of the same shape are displayed with an aspect ratio of 3: 3.
[0040]
Although the embodiment of FIG. 1 is configured so that the strobe signal STRB is supplied to the memory 52 corresponding to the right screen, the left and right sides of the picture tube 17W are not changed until the strobe signal is actually supplied. , The same television broadcast program is displayed as a moving image.
[0041]
To set a specific screen in the broadcast program as a still image, when the viewer selects manual still using the remote control transmitter 47, a control signal from the control system 40 is transmitted to the switch 53 in accordance with the selection operation. The movable contact is switched to the m-side contact as shown in FIG.
[0042]
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, and the still key is designated by operating the still key. The written video data corresponding to the specific screen in the broadcast program is written to the memory 52, and further writing of the video data to the memory 52 is prohibited.
Thereby, as shown in FIG. 3, the moving image mv is displayed in real time on the left screen PL on the screen SCw of the picture tube 17W, and the desired still image st is continuously displayed on the right screen PR. Is displayed.
[0043]
For example, when a television shopping program is being broadcast, the reception telephone number and the price of a product are displayed as a still image, and when a cooking program is being broadcast, a recipe or the like is displayed as a still image. When a travel program is broadcast, a sightseeing guide or the like is displayed as a still image.
As described above, the still image information on the memory 52 is transferred to the external recording / reproducing device 2 and recorded, so that it can be reproduced and used at any time.
[0044]
On the other hand, on the screen that the broadcaster wants the viewer to record as a still image, a control function for displaying a still image is assigned to the closed caption type control code as described above, and multiplexed with the video signal. It will be broadcast.
On the receiver side, character information is extracted from the demodulated video signal by the character information extracting circuit 31 of the character multiplex information processing system 30, and the extracted character information is decoded by the decoding circuit 32, and the strobe signal STRB is converted to the strobe signal STRB. Will be played.
[0045]
When the viewer selects the automatic still using the remote control transmitter 47,
The selection control signal as described above is supplied to the switch 53, and the movable contact is switched to the c-side contact, and the reproduction strobe signal STRB is supplied to the memory 52, and the still image The video data corresponding to the screen to which the code is added is written to the memory 52, and further writing of the video data to the memory 52 is prohibited.
Thereby, as shown in FIG. 3, the moving image mv is displayed in real time on the left screen PL on the screen SCw of the picture tube 17 </ b> W without any operation by the viewer, and the right screen PR is displayed on the right screen PR. A predetermined still image st is continuously displayed.
[0046]
For example, when a television shopping program is broadcast, an image of the product itself is broadcast in addition to the reception phone number and the price of the product, but if the image of the product itself is recorded as a still image on the receiving side, it becomes a catalog. Since the broadcast station is used effectively, a still image code may be assigned to a plurality of screens in a program on the broadcast station side.
[0047]
Therefore, it is desirable that the capacity of the memory 52 be large enough to support a plurality of still images.
Alternatively, every time a 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.
[0048]
In the above-described embodiment, a specific screen designated based on the operation of the still image key of the viewer or the addition of the still image code on the broadcast station side is displayed as a still image in the same shape as the moving image, so that it is easy to see. Can be done.
[0049]
The transmission of the still picture code given by the broadcasting station uses a closed caption type decoder, which is essential in the United States, and a two-screen display for realizing a picture-and-picture function. The processing circuit is not particularly expensive compared to the circuits for picture-in-picture and picture-out-picture functions that are installed in conventional television receivers. It can be realized at the same cost as the machine.
[0050]
[Other embodiments]
In the above-described embodiment, a specific video is recorded as a still image from a series of videos of a broadcast program. However, in the series of videos of the broadcast program, only one frame independent video is identified by an identification code. With the receiver side decoding the identification code, only the television receiver equipped with the picture and picture function displays the broadcast program as a moving image on one screen and In this screen, an independent image of only one frame can be displayed as a still image.
In a conventional television receiver, even if an independent video is inserted for only one frame, the video is not recognized by the viewer.
[0051]
On the other hand, in the closed caption text mode, as described above, a maximum of 32 characters × 15 lines is displayed over the entire screen.
From the broadcast station side, in this text mode, a still image code is added to each screen, and, for example, information of an electronic newspaper is transmitted at midnight. On the receiving side, as described above, for example, a magneto-optical disk device is used. By sequentially recording the information of the electronic newspaper, the next morning, the electronic newspaper recorded on the magneto-optical disk device can be reproduced so that the latest information can be quickly known.
When recording information of an electronic newspaper, the video output circuit, the deflection / high voltage circuit, and the audio system of the television receiver are not operated.
[0052]
In each of the above-described embodiments, a case has been described in which a still image is recorded by a television receiver equipped with a picture-and-picture function. However, a television receiver equipped with a picture-in-picture function or a picture-out-picture function is described. The same applies to the case of a John receiver. In this case, by reproducing the recorded still image using an external recording / reproducing device, the difficulty of viewing on a small screen is eliminated.
[0053]
Further, in each of the above-described embodiments, the case where the present invention is applied to a television receiver compatible with a closed caption system has been described. Can be applied.
[0054]
In each of the above-described embodiments, a broadcast program is used as a signal source for recording a still image. However, for example, an index of a video tape owned by a viewer can be produced by using a VTR as a signal source.
[0055]
【The invention's effect】
As described above, according to the present invention, there is provided a television receiver including a plurality of memories and a plurality of screens for simultaneously displaying a plurality of screens on a single image display element. The video information from the same signal source is sequentially written to a plurality of memories, sequentially read out, a moving image is displayed on a plurality of screens, and based on a predetermined operation of a viewer, or from a broadcast station side. A predetermined command signal generated based on a predetermined signal multiplexed and transmitted to a video signal, prohibits writing after designating writing of specific video information to one of a plurality of memories, Since a specific still image is displayed on one of the screens, it is possible to control the still image recording on the television receiver side from the broadcasting station side. specific Storage, such as image information is easily performed, it is possible to deliver, such as an electronic catalog by the broadcast.
[0056]
In addition, since the predetermined signal transmitted from the broadcast station is detected by the teletext decoder, which is indispensable for a television receiver in the United States, the economic burden on both the broadcast station and the receiver can be reduced.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of a television receiver according to the present invention.
FIG. 2 is a block diagram showing a configuration of a main part of one 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

Claims (3)

A television receiver for receiving a television broadcast signal in which a still image display command signal is multiplexed with a video signal,
Demodulation means for receiving the television broadcast signal and demodulating a video signal from the received television broadcast signal;
Display means for displaying an image based on the video signal demodulated by the demodulation means on a display screen,
Image information storage means for storing a plurality of image information to be displayed in each divided region when the display region of the display screen is divided,
Extracting means for extracting the still image display command signal multiplexed with the video signal,
In the image information storage means, a video signal demodulated by the demodulating means, the divided writes converted to a size corresponding to each display area, the plurality of images written in the image information storage unit Reading the information and displaying all of the plurality of pieces of image information as one screen on the display screen , wherein one of the plurality of pieces of image information to be displayed in the divided area is extracted by the extraction means. and it said still picture display command signal to a particular screen in a video signal more designated for display as a still image, after a particular screen in a video signal which is designated by a command signal for the still image display And a multi-screen display processing means for setting image information in which writing of the demodulated video signal is prohibited . A means for generating a command signal for still image display different from the command signal for still image display multiplexed on the video signal, according to a user's operation input,
A switching unit that outputs one of the still image display command signal and the another still image display command signal from the extraction unit,
When the still image display command signal is obtained from the extraction unit, the switching unit controls the switching unit to output the still image display signal from the extraction unit. The television receiver according to claim 1, further comprising: a control unit that controls to output the another still image display command signal when the signal is generated. In a television receiving system including a broadcasting station device for transmitting a television broadcast signal and a television receiving device for receiving the television broadcast signal,
The broadcast station device,
Multiplexing means for multiplexing a still image display command signal with a video signal of the television broadcast signal,
The television receiver,
Demodulation means for receiving a television broadcast signal from the broadcast station device and demodulating a video signal from the received television broadcast signal;
Display means for displaying an image based on the video signal demodulated by the demodulation means on a display screen,
Image information storage means for storing a plurality of image information to be displayed in each divided region when the display region of the display screen is divided,
Extracting means for extracting the still image display command signal multiplexed with the video signal,
In the image information storage means, a video signal demodulated by the demodulating means, the divided writes converted to a size corresponding to each display area, the plurality of images written in the image information storage unit Reading the information and displaying all of the plurality of pieces of image information as one screen on the display screen , wherein one of the plurality of pieces of image information to be displayed in the divided area is extracted by the extraction means. and it said still picture display command signal to a particular screen in a video signal more designated for display as a still image, after a particular screen in a video signal which is designated by a command signal for the still image display A multi-screen display processing means for setting image information in which writing of the demodulated video signal is prohibited .

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