JP3570436B2 - Broadcast system for television signal and television receiver - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a television signal broadcasting system and a television receiver used in the system.
[0002]
[Prior art]
For example, videos related to personal privacy, violent videos, obscene videos, etc. are cut in advance by public broadcasting standards and voluntary regulations of the broadcasting station. Or it is broadcast after being mosaiced.
[0003]
However, due to broadcasting standards and voluntary regulations on the broadcasting station side, video that may cause problems as described above may be cut or even if it is a mosaic-processed TV program, it may contain video that the child does not want to show. May be.
[0004]
At present, as described above, when a video that the user does not want to show to a child is provided as a video of a television program being watched, a method of not showing the video to a child is to turn on the power of the television receiver. There is no other way to stop watching the TV program you were watching by turning off or selecting another channel.
[0005]
[Problems to be solved by the invention]
However, as described above, if the video provided by the television program is a video that the child watching together does not want to show, for example, a violent video, the determination that he or she does not want to show is determined by the violent Done after the video is provided. Therefore, even if it is determined that this image is not desired to be shown and the power of the television receiver is turned off, actually, the violent video until the power is turned off and the television receiver is determined is visible. I have.
[0006]
Also, there is no information on how long the video that you do not want to show continues. Therefore, because the video that you did not want to show was provided, you turned off the television receiver, and when the video was finished, you turned on the power to the television receiver, and the video that you did not want to see still continued. Also happens. Conversely, because the video you did not want to show was provided, you took too much time to turn off the television receiver and turn it on again, and you could not understand the flow and story of the program or needed information. Sometimes you miss something.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a television signal broadcasting system and a television receiving apparatus that can eliminate the above-mentioned disadvantages.
[0008]
[Means for Solving the Problems]
A broadcasting system of a television signal according to the present invention includes:
On the television transmitter side,
When a television signal including a video signal is received by the television receiving apparatus, an image corresponding to the video signal is correctly reproduced and displayed, or an image corresponding to the video signal is correctly displayed. Control information indicating whether to reproduce and display is multiplexed and transmitted without modifying the original video signal,
On the television receiver side,
Receiving the television signal, extracting a video signal and control information contained in the television signal,
If the television receiver is set to a mode for correctly reproducing and displaying an image corresponding to the video signal regardless of the state of the control information, the image corresponding to the video signal is correctly reproduced and displayed,
When the television receiving apparatus is set to a mode of switching whether to correctly reproduce and display an image corresponding to the video signal according to the state of the control information, When indicating that the image corresponding to the signal is to be correctly reproduced and displayed, the image corresponding to the video signal is correctly reproduced and displayed, and the control information indicates that the image corresponding to the video signal is not correctly reproduced and displayed. If it is the original video signal, the original video signal is modified so that an image corresponding to the video signal is not correctly reproduced and displayed.
[0009]
In addition, the television receiver according to the present invention includes:
Control information indicating whether to correctly reproduce and display an image corresponding to the video signal or not to correctly reproduce and display the image corresponding to the video signal is multiplexed and transmitted without modifying the original video signal. A television receiver capable of receiving a television signal,
Receiving means for receiving a setting input of a first mode for performing processing on the video signal in accordance with a state of the control information;
Extracting means for receiving the television signal and extracting a video signal and the control information included in the television signal,
Image display restricting means for preventing images from being reproduced and displayed correctly;
When the control mode is set to the first mode through the reception unit and the control information indicates that an image corresponding to the video signal is not to be reproduced and displayed correctly, the image display restriction unit Control means for controlling to prevent the image corresponding to the video signal from being correctly reproduced and displayed.
It is characterized by having.
[0010]
[Action]
In the broadcasting system having the above configuration, for example, it is better not to show to young people. Control information for specifying scene sections, etc. Is multiplexed in a television signal and broadcast. In a television receiver, Control information Extracts the specified section Then Image display restriction circuit For example, an image that is not correctly reproduced and displayed from the mosaic processing circuit is displayed on the screen, thereby avoiding a situation in which the scene is provided to the youth as it is. Then, when the scene ends, the control information indicates that, and the screen returns to a normal screen.
[0011]
【Example】
Hereinafter, embodiments of a television signal broadcasting system and a television receiver according to the present invention will be described with reference to the drawings.
[0012]
In the first embodiment described below, a television receiver Image display restriction circuit And a signal for controlling the mosaic processing (hereinafter, referred to as a mosaic control signal) is multiplexed and broadcast during the vertical blanking period of the video signal. Then, the television receiving apparatus that has received the signal extracts a mosaic control signal, and controls whether or not to display a mosaiced image and an image area in which the mosaic processing circuit operates by using the extracted signal. To do.
[0013]
FIG. 1 is a diagram illustrating an example of a format of a mosaic control signal multiplexed in a vertical blanking period of a video signal.
[0014]
As shown in FIG. 1, the mosaic control signal 90 is multiplexed in one or more unused horizontal scanning periods (H in the figure) in a vertical blanking period VBL of the video signal. The mosaic control signal 90 includes mosaic on / off information SW and position information for specifying a screen position where the mosaic processing of the video signal is performed. In this example, the position information for designating the screen position for performing the mosaic processing includes start horizontal position information HPS, end horizontal position information HPE, start vertical position information VPS, and end vertical position information VPE.
[0015]
The mosaic on / off information SW is information for switching between displaying a mosaiced screen or a normal screen. That is, the signal is a signal for specifying whether or not the image is correctly reproduced and displayed, in other words, information for specifying a specific section in which the image is not correctly reproduced and displayed. For example, when the mosaic on / off information SW is “1”, a mosaic-processed screen is displayed, and when the mosaic on / off information SW is “0”, a normal screen on which mosaic processing is not performed is displayed. Control the device.
[0016]
The broadcast station picks up in advance a scene that is considered to be mosaic-processed, and sets the mosaic on / off information SW to “1” for a section where the scene continues and “0” for other sections. When designating that the entire screen is to be mosaiced, the position information is not added. When designating that only a specific area of the screen is to be mosaiced, the position information is multiplexed. Of course, position information specifying the entirety of one screen may be added.
[0017]
Of the start horizontal position information HPS, the start vertical position information VPS, the end horizontal position information HPE, and the end vertical position information VPE, the start horizontal position information HPS and the end horizontal position information HPE are used to determine the horizontal direction on the screen on which the mosaic processing is performed. An area is specified, and a vertical area on the screen on which mosaic processing is performed is specified by the start vertical position information VPS and the end vertical position information VPE. That is, the rectangular area A indicated by oblique lines in FIG. 2 is the area on the screen G where the mosaic is executed, which is specified by the mosaic control information 90.
[0018]
Next, a television receiver including a mosaic processing circuit for receiving a television signal in which the above-described mosaic control signal is multiplexed will be described. FIG. 3 is a block diagram of an example of a television receiver having a mosaic processing circuit and a mosaic control signal extraction function. In this example, the television receiver 300 is an example of a cable television receiver.
[0019]
The television receiver 300 includes a television signal input terminal 40a, a tuner decoder unit 40, an audio processing unit 41, a video signal processing unit 42, a mosaic processing circuit 43, a mosaic control signal extraction circuit 50, a logic circuit 60, and a control signal generation. A remote control commander 80, a remote control signal receiving unit 81, and a remote control signal decoding unit 82.
[0020]
The television signal transmitted via the cable is supplied to the tuner / decoder unit 40 through the input terminal 40a. In the tuner / decoder section 40, a television signal of a channel desired by the viewer is selected based on the tuning signal supplied from the control signal generation section 70, and a video demodulator built in the tuner / decoder section 40. The video signal and the audio signal are demodulated by the audio demodulator.
[0021]
The demodulated audio signal is supplied to the audio signal processing unit 41, which converts the demodulated audio signal into the audio signal supplied to the monitor receiver 400 and supplies the audio signal to the monitor receiver 400.
[0022]
On the other hand, the demodulated video signal is supplied to the video signal processing unit 42. The video signal processing unit 42 includes a Y / C separation circuit 421, a chroma decoder 422, a matrix circuit 423, a switching circuit 424, and a mosaic processing circuit 43.
[0023]
In the Y / C separation circuit 421, the supplied video signal is separated into a luminance signal Y and a carrier chrominance signal C, and the carrier chrominance signal C is supplied to a chroma decoder 422. The chroma decoder 422 decodes the color difference signals RY and BY from the supplied carrier color signal C. Then, the luminance signal Y, the color difference signal RY, and the color difference signal BY are supplied to a matrix circuit 423, from which three primary color signals R, G, and B of red, green, and blue are obtained. These three primary color signals R, G, B are supplied to a switching circuit 424.
[0024]
The three primary color signals R, G, B from the matrix circuit 423 are also supplied to the mosaic processing circuit 43. In this example, the mosaic processing circuit 43 includes a sampling and holding circuit 431 and a sampling clock generation circuit 432, and the three primary color signals R, G, and B are supplied to the sampling and holding circuit 431.
[0025]
From the sampling clock generation circuit 432, a sampling clock MSH having a frequency several times to about ten times the horizontal frequency and synchronized with the horizontal synchronization signal and the vertical synchronization signal as described later is obtained from the sampling clock generation circuit 432. The sampling clock MSH is supplied to the sampling and holding circuit 431, and the three primary color signals R, G and B are respectively sampled and held. Then, the sampling hold output is supplied to the switching circuit 424. In this example, the sampling hold output of the three primary color signals is obtained by rounding the data of one horizontal line to several to ten pieces because the frequency of the sampling clock MSH is as described above. There is a mosaic process.
[0026]
The switching circuit 424 supplies, from the logic circuit 60 described later, which of the three primary color signals mosaiced as described above and the normal three primary color signals from the matrix circuit 423 is supplied to the monitor receiver 400. Switching based on the control signal CTL.
[0027]
The video signal demodulated by the tuner / decoder 41 is also supplied to the sync separation circuit 44 and the gate circuit 52 of the mosaic control signal extraction circuit 50. The horizontal synchronization signal HD and the vertical synchronization signal VD extracted by the synchronization separation circuit 44 are supplied to the sampling clock generation circuit 432 of the mosaic processing circuit 43.
[0028]
The sampling clock generation circuit 432 generates a sampling clock MSH as a clock synchronized with the horizontal synchronization signal HD and the vertical synchronization signal VD by, for example, a PLL circuit.
[0029]
The mosaic control signal extraction circuit 50 includes a gate signal generation section 51, a gate section 52, a binarization processing section 53, a mosaic control signal decoding section 54, and an area signal generation circuit 55.
[0030]
The vertical synchronization signal VD and the horizontal synchronization signal HD extracted by the synchronization separation circuit 44 are also supplied to the gate signal generation circuit 51 and the area signal generation circuit 55 of the mosaic control signal extraction circuit 50.
[0031]
The gate signal generation circuit 51 generates a gate signal for extracting a mosaic control signal multiplexed in a predetermined horizontal scanning period of the vertical blanking period of the video signal shown in FIG. The generated gate signal is supplied to a gate circuit 52, which extracts a mosaic control signal from the video signal from the tuner / decoder unit 40. The extracted mosaic control signal is supplied to the binarization processing unit 53.
[0032]
The binarization processing unit 53 binarizes the mosaic control signal and converts it into digital data. The binarized mosaic control signal is supplied to the mosaic control signal decoding unit 54.
[0033]
The mosaic control signal decoding unit 54 decodes the mosaic on / off information SW and the mosaic position data such as start horizontal position information HPS, start vertical position information VPS, end horizontal position information HPE, and end vertical position information VPE. The decoded mosaic on / off information SW is supplied to the logic circuit 60, while the start horizontal position information HPS, the start vertical position information VPS, the end horizontal position information HPE, and the end vertical position information VPE are supplied to the area signal generation circuit. 55.
[0034]
The area signal generation circuit 55 generates an area signal SPC for designating a predetermined area (see area A in FIG. 2) on the screen to be mosaic-processed from the position information supplied thereto. Supplied.
[0035]
The sampling clock generation circuit 432 generates the sampling clock signal MSH only in the mosaic processing section specified by the area signal SPC, and supplies it to the sampling and holding circuit 431. Therefore, the sampling and holding circuit 431 performs the mosaic processing only on the video signal in the section corresponding to the area specified by the area signal SPC.
[0036]
In this example, when the position information is not included in the multiplexed information, and when there is no multiplexed information, the area signal SPC designates one entire screen. Sampling clocks MSH are generated over the entire screen, supplied to the sampling and holding circuit 431, and the mosaic processing is performed on the entire screen. However, whether or not the mosaic screen is displayed depends on the switching state of the switching circuit 424.
[0037]
For example, when the image shown in FIG. 4 is subjected to mosaic processing on the entire screen by the sampling and holding circuit 431, the image shown in FIG. 5 is displayed, and the lower 1/3 area of the screen is designated by the area signal SPC and the mosaic is performed. When processed, the image shown in FIG. 6 is displayed. By setting a plurality of rectangular areas for mosaic processing per screen, the mosaic processing can be executed in a desired size and shape at an arbitrary position on the screen by the above-described area signal. .
[0038]
The mosaic on / off information SW from the mosaic control signal decoding circuit 54 is supplied to the switching circuit 424 via the logic circuit 60 as a control signal CTL, and the scene section in which the mosaic on / off information SW is “1” is The state is switched to a state in which the three primary color signals from the sampling and holding circuit 431 are selected.
[0039]
Therefore, in the scene section where the mosaic on / off information SW is “1”, the video signal that has been subjected to the mosaic processing in the entire screen or in the section specified by the area signal SPC is supplied to the monitor receiver 400. The mosaiced image is displayed on the screen.
[0040]
The logic circuit 60 is provided to enable a user to forcibly turn on / off the mosaic processing. That is, when the user performs an operation of designating forcible ON of the mosaic processing, the logic circuit 60 forms and outputs a control signal CTL that causes the switching circuit 424 to select the three primary color signals from the sampling and holding circuit 431. That is, the switching circuit 424 forcibly selects the three primary color signals from the mosaic processing circuit 43 irrespective of the state of the mosaic on / off information SW superimposed on the video signal by the user's forced on operation of the mosaic processing. I do.
[0041]
At this time, if the mosaic control signal is not superimposed on the video signal, an image in which mosaic processing has been performed on the entire screen as described above is obtained. When the mosaic control signal including the position information is superimposed on the video signal, an image in which the area specified by the position information is subjected to the mosaic processing is obtained on the monitor receiver 400.
[0042]
When the user performs an operation of designating forcible off of the mosaic processing, the logic circuit 60 forms and outputs a control signal CTL that causes the switching circuit 424 to select the three primary color signals from the matrix circuit 423. Therefore, the mosaic processing is not executed by the user forcibly turning off the mosaic processing regardless of the state of the mosaic on / off information SW superimposed on the video signal.
[0043]
The forced on / off of the mosaic processing by the user as described above is performed by operating the remote control commander 80. For example, although not shown, the remote control commander 80 has three switches of a mosaic processing forced on button, a forced off button, and an automatic button (or one button having a switching position corresponding to the above three buttons). I have.
[0044]
The automatic button is a switch for designating selection of a mosaic-processed screen according to a mosaic control signal superimposed on a video signal.
[0045]
Then, when any one of the forced on button, the forced off button, and the automatic button of the remote control commander 80 is pressed by the user, a remote control signal corresponding to the pressed button is formed and output. The remote control signal is received by the remote control signal receiving unit 81 and supplied to the remote control signal decoding unit 82. The remote control signal decoding unit 82 decodes the remote control signal and supplies the decoded signal to the control signal generation unit 70.
[0046]
In the control signal generator 70, a control signal to be supplied to the logic circuit 60 is formed based on the decoded remote control signal, and is supplied to the logic circuit 60. Then, as described above, the control signal CTL for controlling the switching circuit 424 is output from the logic circuit 60, and the user can forcibly turn on or off the mosaic processing.
[0047]
Normally, the forced on, forced off, and automatic states of the mosaic processing selected by the user are set to a state different from the current state. Is held until it is dropped. When the power of the television receiver is turned on, the television receiver is set to an automatic state in which the mosaic processing is performed by the mosaic control signal.
[0048]
The remote control commander 80 can perform operations such as turning on / off the power of the television receiver, selecting a channel, and adjusting the volume, in addition to the above-described forced on / off operation of the mosaic processing.
[0049]
Next, the above-described area signal generation circuit 55 and area signal SPC will be described with reference to FIGS.
[0050]
FIG. 7 is a block diagram of an example of the area signal generation circuit 55, and FIG. 8 is a waveform diagram for explaining a generation process of the area signal SPC.
[0051]
The horizontal counter 501 obtains a count value CNT1 serving as information indicating a pixel position in the horizontal direction. A clock from a clock generator 502 is supplied to its clock terminal, and a horizontal synchronization signal from a synchronization separation circuit 431. HD (FIG. 8A) is supplied to its reset terminal.
[0052]
The clock generator 502 is constituted by a PLL circuit in this example, to which a horizontal synchronizing signal HD is supplied, from which the clock generator 502 synchronizes with the horizontal synchronizing signal HD, and controls each horizontal direction of the screen of the monitor receiver 400. A clock signal corresponding to the pixel is supplied to the horizontal counter 501. Then, information on the count value CNT1 of the horizontal counter 501 is supplied to the comparison circuits 504 and 505.
[0053]
The comparison circuit 504 compares the count value CNT1 with the value stored in the register 503. This register 503 stores and holds the start horizontal position information HPS decoded by the mosaic control signal decoding unit 54.
[0054]
Further, the comparison circuit 505 compares the count value CNT1 with the value stored in the register 506. The register 506 stores and holds the end horizontal position information HPE decoded by the mosaic control signal decoding unit 54.
[0055]
When the count value CNT1 matches the start horizontal position information HPS held in the register 503, the comparison circuit 504 outputs a match output signal C1 (FIG. 8B), and outputs the match output signal C1 to the set terminal S of the flip-flop circuit 507. To supply.
[0056]
When the count value CNT1 matches the end horizontal position information HPE held in the register 506, the comparison circuit 505 outputs a match output signal C2 (FIG. BC), and resets the match output signal C2 to reset the flip-flop circuit 507. Supply to terminal R.
[0057]
Therefore, as shown in FIG. 8D, a signal FFH that becomes “1” at the time of the coincidence output signal C1 and “0” at the time of the coincidence output signal C2 is obtained from the flip-flop circuit 507. This signal FFH is a signal indicating a horizontal mosaic processing section. This signal FFH is supplied to the AND circuit 514.
[0058]
On the other hand, the vertical counter 508 is for obtaining information indicating a line position in one screen. The vertical counter 508 is supplied with the horizontal synchronization signal HD extracted by the synchronization separation circuit 431 as a clock signal, and The vertical synchronization signal VD (FIG. 8E) extracted by the separation circuit 431 is supplied as a reset signal. Then, information on the count value CNT2 of the vertical counter 508 is supplied to the comparison circuits 510 and 511.
[0059]
In comparison circuit 510, count value CNT2 is compared with the value stored in register 509. The register 509 stores and holds the start vertical position information VPS decoded by the mosaic control signal decoding unit 54.
[0060]
Further, the comparison circuit 511 compares the count value CNT2 with the value stored in the register 512. This register 511 stores and holds the end vertical position information VPE decoded by the mosaic control signal decoding unit 54.
[0061]
When the count value CNT2 matches the start vertical position information VPS stored in the register 509, the comparison circuit 510 outputs a match output signal C3 as shown in FIG. 8F. This coincidence output signal C3 is supplied to the set terminal S of the flip-flop circuit 513.
[0062]
When the count value CNT2 of the vertical counter 508 matches the end vertical position information VPE of the register 512, the comparison circuit 511 outputs a match output signal C4 as shown in FIG. 5G. This coincidence output signal C4 is supplied to the reset terminal R of the flip-flop circuit 513.
[0063]
Therefore, as shown in FIG. 8H, the signal indicating the vertical mosaic processing section that changes from the time point of the coincidence output signal C3 to “1” and returns to “0” at the time point of the coincidence output signal C4 is output from the flip-flop circuit 513. FFV is obtained. This signal FFV is supplied to the AND circuit 514.
[0064]
The AND circuit 514 outputs a logical product output of the signal FFH indicating the horizontal mosaic processing section and the signal FFV indicating the vertical mosaic processing section on the screen of the monitor receiver 400 to perform the mosaic processing. An area signal SPC (FIG. 8I) which becomes "1" only in the section is generated.
[0065]
As described above, the sampling clock generation circuit 432 included in the mosaic processing circuit 43 supplies the sampling clock MSH to the sampling and holding circuit 431 only in a section where the area signal SPC is “1”. As a result, the mosaic processing is performed on the video signal in the section where the area signal SPC is “1”.
[0066]
In this way, the information in the mosaic control signal multiplexed with the television signal specifies the position on the screen where the mosaic processing is to be executed.
[0067]
Next, a second embodiment will be described with reference to FIGS. In a second embodiment described below, a response is requested to a viewer by a television program, and the viewer responds to a broadcast station via a telephone line, for example, in a television of an interactive television broadcast. This is the case of the receiving device. This example, like the previous example, Image display restriction circuit Is composed of a mosaic processing circuit, and performs exactly the same mosaic processing as described above.
[0068]
The interactive television broadcasting in this example is an effective broadcasting method for programs that require a response from a viewer in real time, such as quiz programs, television shopping, questionnaire surveys, and TV auctions. Necessary telephone line numbers for responding via the telephone line and information on the end of the telephone number of the viewer to limit the response are multiplexed with the television signal and supplied to the television receiver. You.
[0069]
In the case of this example, the information on the above-described interactive television program and the information for controlling the mosaic processing circuit included in the television receiver of this example include a DTMF (Dual Tone Multi Frequency) signal, which is an audio band signal, and an audio signal. Multiplexed and transmitted. Therefore, the television receiver of this example has a function of decoding a DTMF signal.
[0070]
First, the DTMF signal will be described with reference to FIG.
[0071]
[DTMF signal]
DTMF signaling is an audio band signaling that simultaneously sends two tones of a low frequency group (low group) and a high frequency group (high group). Each of these low and high frequency groups consists of tones of four audio band frequencies, no two of which are articulated.
[0072]
In the DTMF signal, the four frequencies of the low group are, for example, 697 Hz, 770 Hz, 852 Hz, and 941 Hz, and the four frequencies of the high group are, for example, 1209 Hz, 1336 Hz, 1477 Hz, and 1633 Hz. Then, one frequency of each of the low group and the high group is combined, and each DTMF signal (each of these DTMF signals is hereinafter referred to as a function signal) composed of the combination is divided into four rows as shown in FIG. The buttons are assigned to push buttons “0” to “D” arranged in four rows.
[0073]
In telephone communication, only 12 out of 16 functional signals of the DTMF signal are generally used as signals for subscriber addresses (telephone numbers). That is, the function signals of the above twelve combinations correspond to the numbers “0” to “9” used as so-called numeric keys on the telephone and the symbols “*” and “#”. The function signals corresponding to the characters "A", "B", "C", and "D" indicated by broken lines in FIG. 9 are not generally used in Japan, but are operated using a push button (PB) dial. It is only used for data transmission.
[0074]
When a line is selected by telephone number using such a DTMF signal, signal transmission conditions are defined as shown in FIG.
[0075]
Due to the combination of the two frequencies and the transmission conditions as described above, the DTMF signal rarely occurs in the natural world and can be clearly distinguished from natural sounds such as human voices. The signal can be multiplexed (mixed) and broadcast, and separation on the receiving side is relatively easy.
[0076]
By the way, the DTMF signal is also used in multi-function telephones, and it is possible to play a message recorded on an answering machine on a home phone by operating a push-button telephone from outside, or to respond to a message recorded by an answering machine. Can be recorded and played back, and messages can be deleted.
[0077]
[Multiplexing information]
On the transmitting side of this embodiment, that is, the broadcasting station side, when transmitting the multiplexed information, "A", "B", "C", and "D" that are not used for the PB line selection as described above are used. Among the meaningful function signals, the function signals “A”, “B”, and “C” are used as transmission start information of multiplexed information, and the function signal “D” is used as transmission end information.
[0078]
Since there are three types of transmission start information, in this example, the multiplexed information can be transmitted in three types. That is, the three types of multiplexed information are broadcast by being separated by one of the functional signals “A”, “B”, and “C” and the functional signal “D” for each type.
[0079]
For example, information on response access to an interactive program, for example, information such as the telephone number of the access destination (accepting telephone number) and the transmission rate, uses the function signal "A" as transmission start information and the transmission end information "D Are transmitted between the function signal. Similarly, information on the environment setting such as the restriction of the end of the telephone number of the answering side and the current time setting includes information on clearing of the received data between the function signal “B” and the function signal “D”. Are multiplexed and broadcast as signals sandwiched between the "C" function signal and the "D" function signal.
[0080]
Then, on the receiving side, numerical value or symbol data sandwiched between any of the function signals “A”, “B”, and “C” as transmission start information and the function signal “D” as transmission end information Is regarded as a multiplexed data sequence (information group), and is stored in a predetermined storage area of the memory in a distinguished manner as described later.
[0081]
For example, as information on response access, if access to a reception telephone number 0990-1234-1234 at a transmission rate of 300 bps is permitted to a receiver whose interactive television standard version is 00, multiplexing information is used. Is
00 # 0990 * 1234 * 1234
Is multiplexed with the main broadcast audio signal in a state of being sandwiched between the "A" function signal and the "D" function signal and transmitted. You. Here, the first 00 in the data sequence indicates that the interactive (interactive) television standard version is 00 (transmission rate 300 bps), and the numerical data after the symbol “#” is the reception telephone number.
[0082]
Further, when permitting the receiver having the interactive television standard version 01 to access the telephone number 0990-1234-1235 at the transmission rate of 1200 bps,
01 # 0990 * 1234 * 1235
Is multiplexed with the main broadcast audio signal in a state of being sandwiched between the "A" function signal and the "D" function signal and transmitted. You. Here, in the data sequence, the first 01 indicates that the interactive (interactive) television standard version is 01 (transmission rate 1200 bps), and the numerical data after the symbol “#” is the reception telephone number.
[0083]
In the data sequence relating to the response access as described above, the symbol “#” indicates a separator (separation of individual data), and the symbol “*” indicates a pause.
[0084]
When restricting access to only viewers having a specific telephone number (subscriber number) as information related to environment settings, for example, when permitting access only to a number with a telephone number ending in 0,
0 # 0
When a data string composed of the respective function signals of the DTMF signal as described above is permitted to access only the telephone number ending in 1,
0 # 1
Are multiplexed with the main broadcast audio signal while being sandwiched between the "B" function signal and the "D" function signal. Sent out. In this case, the number “0” before the symbol “#” means that access from a telephone number having the number following the symbol “#” as the end is permitted.
[0085]
Also, if you want to allow access only to even-numbered phone numbers,
0 # 0 * 0 # 2 * 0 # 4 * 0 # 6 * 0 # 8
Is multiplexed with the main broadcast audio signal in a state of being sandwiched between the "B" function signal and the "D" function signal and transmitted. You. Here, the symbol “*” means a logical sum.
[0086]
Then, as information on clearing the received data, for example, in the case of clearing the number restriction,
99 # 0
Is transmitted between the function signal of "C" and the function signal of "D", and when the reception telephone number is cleared. Is
99 # 1
A data string composed of each function signal of the DTMF signal is transmitted between the function signal of “C” and the function signal of “D”.
[0087]
As described above, function signals "A", "B", "C", and "D" that are not used as telephone line selection signals are used as transmission start information and transmission end information of multiplexed information. Thus, for example, even if a DTMF sound is transmitted in a drama phone call, the DTMF sound is not confused with the program-related information. Also, multiplexed information can be transmitted and received reliably.
[0088]
Next, a description will be given of mosaic control information transmitted as a DTMF signal in order to perform mosaic processing on a video scene picked up in advance by the broadcast station on the television receiving apparatus side.
[0089]
Mosaic on / off information
44 # 0
44 # 1
Is multiplexed with the main broadcast audio signal and transmitted while being sandwiched between the "B" function signal and the "D" function signal. The first “44” in the data string is information indicating that the information following thereafter is the mosaic on / off information SW, and “0” or “1” after “#” is mosaic on / off information SW. The off information SW itself is shown.
[0090]
When only one predetermined portion on the screen is subjected to the mosaic processing, as the position information of the mosaic control information,
33 # 00 # 0100
33 # 01 # 0300
33 # 10 # 0250
33 # 11 # 0350
Is multiplexed with the main broadcast audio signal in a state of being interposed between the function signal of "B" and the function signal of "D" and transmitted. Is done.
[0091]
In the above-mentioned data sequence, the first “33” indicates that the information that follows is the position information of the mosaic processing. “00” after “#” indicates that the information that follows is the horizontal start position information HPS, and “01” indicates that the information is the horizontal end position information HPE. Similarly, "10" indicates that the succeeding information is the vertical start position information VPS, and "11" indicates that the subsequent information is the vertical end position information VPE.
[0092]
The last four digits of each data string are information of specific values of information HPS, HPE, VPS, and VPE. Thus, as described above with reference to FIG. 2, the rectangular area A for performing the mosaic processing can be specified.
[0093]
Further, in this example, in the quiz program, the answer displayed on the screen can be mosaic-processed, and the mosaic process can be turned on only for a viewer who wants to consider together with the performer of the quiz program. . In the case of such a quiz show,
22 # 10
22 # 01
Is multiplexed with the main broadcast audio signal in a state of being interposed between the function signal of "B" and the function signal of "D" and transmitted. Is done.
[0094]
In the above data sequence, the first "22" indicates that the program is a quiz program attached to the answer, and the "10" after "#" sets the mosaic processing on / off initial state to the off state. Information. At this time, the answer of the quiz is displayed on the screen by the video and audio in the quiz program, but viewers who want to consider the quiz without seeing the answer should use the remote control transmitter to forcibly turn on the mosaic processing. Be prompted.
[0095]
Further, when the number after “#” is “01”, this is information for setting the initial state of mosaic processing on / off to the on state. At this time, the answer of the quiz is displayed on the screen by the video and audio in the quiz program, but the mosaic processing is performed. Therefore, a viewer who wants to view the answer should use the remote control transmitter to forcibly turn off the mosaic processing. Prompted by
[0096]
In the case of a quiz program of interactive broadcasting, the mosaic processing of the answer part is forcibly turned on by the multiplex signal regardless of the user's forcible off operation. In this case,
22 # 00
Is multiplexed with the main broadcast audio signal in a state of being interposed between the function signal of "B" and the function signal of "D" and transmitted. Is done.
[0097]
In the data string of this example, “22” indicates that the quiz program is attached to the answer as described above, and “00” after “#” indicates that the answer is set even when the user turns off the mosaic forcibly. Is information that prevents mosaic processing from being canceled.
[0098]
In addition, when the time limit of the answer has passed or when the CPU 21 recognizes that the answer has already been transmitted, the forcible ON of the mosaic processing can be canceled by the viewer's remote control operation. Is also good.
[0099]
In addition, when specifying the area for mosaic processing in the quiz program attached to the answer,
22 # 00 # 00 # 0100
22 # 00 # 01 # 0300
22 # 00 # 10 # 0250
22 # 00 # 11 # 0350
As described above, a data string composed of each function signal of the DTMF signal is transmitted between the function signal of “B” and the function signal of “D”. In this example, “22 # 00” is information for forcibly turning on the mosaic processing of the answer part in the quiz program attached to the answer as described above. "00", "01", "10", and "11" following them are information of a horizontal start position, information of a horizontal end position, information of a vertical start position, and a vertical end position. , And the last four digits of each data string, “0100”, “0300”, “0250”, and “0350”, are the start horizontal position information HPS and the end horizontal position information HPE, which are specific position information. , Start vertical position information VPS, and end vertical position information VPE.
[0100]
[Configuration of Receiver]
Next, an embodiment in which the television receiver according to the present invention is applied to a television receiver compatible with an interactive broadcast program will be described with reference to FIGS.
[0101]
FIG. 11 shows the configuration of an embodiment of the television receiver of this example. In FIG. 11, reference numeral 10 denotes a signal system of the television receiver, and reference numeral 20 denotes a control system thereof.
[0102]
The broadcast wave received by the antenna 1 is supplied to the tuner 11. A tuning signal is supplied from the control system 20 to the tuner 11, and a broadcast signal of a desired channel is selected by the tuner 11 and converted into an intermediate frequency signal. This intermediate frequency signal is supplied to the intermediate frequency circuit 12. The intermediate frequency circuit 12 includes a video demodulator 13 and an audio demodulator 14, and demodulates a video signal and an audio signal.
[0103]
The video signal S13 from the video demodulator 13 is supplied to the picture tube 16 via the video signal processing circuit 15. The video signal circuit 15 corresponds to the video signal processing unit 42 in FIG. 3 and includes a mosaic processing circuit 43 and a switching circuit 424.
[0104]
The audio signal S14 from the audio demodulator 14 is supplied to the audio multiplex decoder 17, and the bilingual signal or the stereo signals SL and SR are decoded. These signals SL and SR are supplied to left and right speakers 19L and 19R through amplifiers 18L and 18R, respectively.
[0105]
The audio signal S14 from the audio demodulator 14 is supplied to the DTMF decoder 32 via the preprocessing circuit 31. The DTMF decoder 32 constantly searches for a DTMF signal in the input signal and, when detecting the DTMF signal, decodes which function signal the DTMF signal is. That is, the numbers “0” to “9”, “#”, “*”, and “A” to “D” are decoded. Then, the decoded data is supplied to the control system 20.
[0106]
The processing of the preprocessing circuit 31 and the DTMF decoder 32 corresponds to the processing of the mosaic control signal extraction circuit 50 of FIG. 3 described in the first embodiment. The mosaic-on / off information SW is processed by a program executed by the CPU 21 of the control system 20, and the horizontal start position information HPS, the horizontal end position information HPE as the screen position information for performing the mosaic processing, and the vertical start. The position information VPS and the vertical end position information VPE are decoded, and the position information is supplied to the area signal generation circuit 27 via the I / O port 261. Then, in the area signal generation circuit 27, an area signal SPC indicating an area where the mosaic processing is to be performed is generated in the same manner as in the above-described example, supplied to the mosaic processing circuit of the video signal processing unit 15, and the mosaic processing is performed.
[0107]
The decoded mosaic on / off information is supplied via the I / O port 261 to a switching circuit 424 (not shown) for the three primary color signals R, G, and B built in the video signal processing unit 15. Control the switching. As in the first embodiment, by operating the remote control commander 34, the viewer can control on / off of the mosaic processing.
[0108]
In this case, a commercially available DTMF decoder widely used is used as the DTMF decoder 32. The pre-processing circuit 31 is provided for performing pre-processing for enabling more accurate decoding of the DTMF signal even when a commercially available DTMF decoder is used as the DTMF decoder 32 as described above. That is, the pre-processing circuit 31 removes frequency components other than the DTMF signal from the audio signal S14 so that the input signal of the DTMF decoder 32 becomes a signal permitted by a commercially available DTMF decoder. Consists of
[0109]
Further, in this embodiment, a modem (modulator / demodulator) 33 for data communication is provided to support an interactive broadcast program such as a response to a viewer participation type program. The telephone line 2 is connected to the line connection terminal Line of the modem 33, and the telephone 3 is connected to the telephone terminal Tel. This modem 33 is connected to the system bus 200 of the control system 20. Also, data from the modem 33 is supplied to the DTMF decoder 32, and the DTMF signal transmitted via the telephone line 2 is decoded by the DTMF decoder 32 so as to be taken into the control system 20. Have been.
[0110]
The control system 20 includes a CPU 21, a ROM 22, a DRAM 23, an SRAM 24, and a video RAM 25, each of which is connected to a system bus 200. The ROM 22 stores various control programs in addition to a DTMF data reception and capture processing program described later, and font and graphic data used for display. The DRAM 23 is mainly used as a work area for calculation, and the SRAM 24 stores setting information and ID information of the receiving device itself.
[0111]
The video RAM 25 is used for display. A display controller 25C is provided for the video RAM 25. The display controller 25C controls reading and writing of video data to and from the video RAM 25, and converts the read video data into an analog video signal. Then, the analog video signal obtained from the display controller 25C is supplied to the video signal processing unit 15 and, together with the control of the video signal processing unit 15 from the control unit 20, is converted into the video signal from the intermediate frequency circuit 12. They are superimposed or switched and synthesized.
[0112]
The control system 20 also supplies a control signal to the video signal processing circuit 15 and the audio multiplex decoder 17 through the I / O port 261. Further, for example, an infrared remote control signal from the remote control commander 34 is received by the remote control receiver 35, the received remote control signal is decoded by the remote control decoding circuit 36, and the decoded remote control signal is transmitted from the I / O port 261. It is taken into the control system 20.
[0113]
Then, control according to a user operation on the remote control commander 34 is performed by the CPU 21 according to a program in the ROM 22. The remote controller commander 34 allows the user to perform the above-described forced mosaic on / off operation and select an automatic mode. Also, for example, in the case of remote control operation such as channel selection and volume control, font data for displaying necessary characters and symbols is read out from the ROM 22 and video The data is transferred to the RAM 25. Then, the data in the video RAM 25 is supplied to the video signal processing circuit 15 and combined with the video signal S13 (for example, superimposed), so that the data is displayed on the screen of the picture tube 16 for an appropriate time.
[0114]
Data such as channel selection and volume control are written to the nonvolatile SRAM 24 each time the operation is performed. When the power is once turned off and then turned on again, the same channel is output at the same volume as immediately before the power was turned off. A so-called last memory function for listening is realized.
[0115]
A channel selection signal is supplied to the tuner 11 via the I / O port 263. Further, in this embodiment, time data from the timer circuit 37 for notification of real time or occurrence of an interruption for a predetermined time is input to the control system 20 through the I / O port 264.
[0116]
[Reception processing of multiplexed information]
Next, the reception processing of the multiplexed information of the embodiment of FIG. 11 will be described with reference to FIGS.
[0117]
When the power of the television receiver is on, the DTMF signal mixed with the audio signal of the program of the currently selected channel is constantly monitored using the preprocessing circuit 31 and the DTMF decoder 32. That is, the CPU 21 searches the output of the DTMF decoder 32 through the I / O port 262 constantly or at a predetermined cycle (step 101), and the DTMF signal is mixed with the audio signal S14 of the broadcast program currently being received. When this is detected (step 102), the decoded output D32 of the DTMF signal is fetched as a number or symbol as described above (step 103).
[0118]
At this time, the transmission conditions as described above, that is, whether the continuous length of the DTMF signal is 50 msec or more, the pause time from the disappearance of the DTMF signal to the rise of the next signal is 30 msec or more, the length of the DTMF signal and the pause time Is checked to see if the sum is equal to or greater than the prescribed value of 120 msec, and it is checked whether the detected signal is a DTMF signal (step 104). Thereby, it is possible to prevent the reception of error data when the reception state of the broadcast radio wave is poor, and to prevent the erroneous reception when the normal voice accidentally contains the same frequency component as the DTMF signal. .
[0119]
If it is determined in step 104 that the received data is not a DTMF signal, the flow advances to step 105 to clear the temporary storage area of the DRAM 23 and initialize the storage pointer. Continue output check.
[0120]
If it is determined that the received data is a DTMF signal, the process proceeds to step 106, where it is checked whether or not the save pointer address is within the range of the temporary storage area. If the save pointer address is not within the range of the temporary storage area, it is in a state immediately after the power is turned on or in an error state. Initialize the address of the area. This prevents data from being written to the DRAM 23 while the address indicated by the storage pointer is undefined, thereby preventing malfunction or software runaway.
[0121]
When it is determined in step 106 that the pointer address is within the range of the temporary storage area, or after the address of the temporary storage area is initially set in the pointer in step 107, the process proceeds to step 108, where the received data is changed from "0" to It is determined whether the data is a number up to “9” or symbol data such as “#” or “*”. If it is determined that these are numerical values or symbols, the process proceeds from step 108 to step 109, where it is checked whether or not there is free space in the temporary storage area.
[0122]
If the received data is such numerical data or symbol data and there is a free space in the temporary storage area, that is, if the pointer points within the range of the temporary storage area, the process proceeds to step 110 and the DRAM 23 The received data ("0" to "9", "#", "*") is stored in the address indicated by the pointer. Then, the process proceeds to step 111 to update the pointer by one character. Thereafter, the process returns to step 101 to continue checking the reception of the DTMF signal.
[0123]
If it is determined in step 109 that there is no free space in the temporary storage area, it is a reception error, and the process proceeds to step 112 to clear the temporary storage area and initialize the address of the temporary storage area in the pointer.
[0124]
If the received data is not numeric or symbolic data such as “0” to “9”, “#”, and “*” in step 108 described above, the character data “ Since it is any one of "A", "B", "C", and "D", the routine enters the partition storing routine 120 of FIG. This routine 120 has the contents shown in FIG. 13. First, in step 121, the start address of the temporary storage area is set in the pointer. Next, in steps 122, 123, and 124, it is sequentially checked whether the received data is one of the three function signals "A", "B", and "C".
[0125]
If it is determined in step 122 that the received data is a function signal of "A", the process proceeds to step 125, where "A" is set to the address indicated by the pointer. If it is determined in step 123 that the received data is a function signal of "B", the flow advances to step 126 to set "B" to the address indicated by the pointer. Further, when it is determined in step 124 that the received data is a function signal of "C", the process proceeds to step 127, and "C" is set to the address indicated by the pointer.
[0126]
After these steps 125, 126, and 127, the process proceeds to step 111, where the pointer is updated by one character. Thereafter, the process returns to step 101 to continue checking the reception of the DTMF signal.
[0127]
If it is determined in steps 122 to 124 that the signal is not one of the three function signals "A", "B", and "C", it is determined that the signal is a function signal of the remaining character "D". Until then, the data stored in the temporary storage area is processed as one data string (information group).
[0128]
That is, at the time of transmitting the DTMF signal, the broadcasting side transmits any of the function signals “A”, “B”, and “C” as the transmission start signal. At the head, one of “A”, “B”, and “C” is stored. Therefore, in the next step 128, it is determined whether the head of the temporary storage area is character data of "A", "B", or "C".
[0129]
If the result of this determination is that the head of the temporary storage area is "A", the flow proceeds to step 129, where the data string from the head of the temporary storage area to the last part indicated by the pointer is stored in the corresponding storage area Ga. . If the head of the temporary storage area is "B", the process proceeds to step 130, and the data string from the head of the temporary storage area to the last part indicated by the pointer is stored in the corresponding storage area Gb. Further, if the head of the temporary storage area is “C”, the process proceeds to step 131, and the data string from the head of the temporary storage area to the last part indicated by the pointer is stored in the corresponding storage area Gc. These storage areas Ga, Gb, Gc are set in the DRAM 23 or the SRAM 24 as described later.
[0130]
Then, the process proceeds to step 132 where the received data string is evaluated and analyzed. If the information stored in the storage areas Ga, Gb, and Gc is a command that needs to be executed at the time of reception, the command is executed. , Such as clearing a part or all of the received information, setting the current time on a timer, and selecting a menu display. Thereafter, the flow returns to step 101 to continue the reception check.
[0131]
As described above, in the multiplexed data receiving process of this embodiment, the character data “A”, “D”, and “B” corresponding to the functional signals in the DTMF signal are constantly monitored while the audio signal of the broadcast program is constantly monitored. A data string sandwiched between the function signals "D" and "D" and "C" and "D" is regarded as one piece of information, divided according to the type of information as described above, and each piece of information is stored in a separate storage area. Automatically save to Ga, Gb, Gc. Thus, in this embodiment, the received information can be classified and stored.
[0132]
For example, if the start signal is a function signal of “A”, a data string is stored in the storage area Ga as information relating to response access to the interactive program. If the start signal is a function signal of “B”, the function signal is stored in the storage area Gb as information related to environment setting. If the start signal is a function signal of "C", the function signal is stored in the storage area Gc as information relating to clearing of received data.
[0133]
Temporary information corresponding to the interactive program, such as information on response access, may be cleared when the number clear signal is received.However, considering the possibility that the channel may be switched when the clear signal is received, the power may be turned off. It is desirable that the old number be cleared at the timing. Therefore, the information regarding the response access may be stored in the DRAM 23 as it is. That is, the storage area Da may be set on the DRAM 23.
[0134]
On the other hand, the information related to the environment setting includes time information for a broadcast program reception reservation, a recording reservation, and the like, as described above, and the time information of the reserved program may exceed one week, for example. Need to be stored for a relatively long period of time. Therefore, it is better to transfer such information to the nonvolatile SRAM 24.
[0135]
Therefore, in this embodiment, the storage areas Ga, Gb, and Gc are volatilized according to the nature of the data to be stored, that is, whether long-term storage is required or whether the data can be erased by turning off the power. Is set on the dynamic DRAM 23 or the nonvolatile SRAM 24.
[0136]
Then, in response processing as described below of the simplified interactive television using a general telephone line for transmitting information in the upward direction to the center station, the destination telephone number and the like stored in the storage area Ga on the DRAM 23 are used. Necessary information such as communication conditions can be automatically read and used.
[0137]
In the first embodiment, the mosaic control information from the broadcasting station is multiplexed in the vertical blanking period of the video signal, and in the second embodiment, the mosaic control information is multiplexed into the audio signal as a DTMF signal. In addition, it is also possible to use a sub audio signal of audio multiplex broadcasting for data transmission, or to use a signal dedicated to data transmission in a completely different band from a video signal and an audio signal.
[0138]
In both the first embodiment and the second embodiment, the television receiver has a built-in mosaic processing circuit, and information about mosaic processing is not multiplexed in the television signal. Also, the mosaic processing can be performed on a predetermined portion by operating the remote control commander by the viewer. In this case, the area of the mosaic processing is the upper half, the lower half, the right half, the left half of the screen, or the upper right portion, the upper left portion, the lower right portion, and the lower left portion when the screen is divided into upper, lower, left, and right. It is also possible to designate switching as in the case of, for example, or to allow the user to designate a rectangular area or an arbitrary polygonal area.
[0139]
In the above embodiment, Image display restriction circuit Although the mosaic processing circuit was used as the above, it is necessary to reproduce the image correctly, so that the entire specified screen or a part of the image area can be displayed in one color or displayed with noise, and various other Can be used to prevent the image from being correctly reproduced.
[0140]
Further, when performing the above-described non-display processing on the entire screen, a character display indicating that the non-display processing is being performed is performed so as to draw the viewer's attention and not to mistake the reception apparatus for a failure. You can also
[0141]
【The invention's effect】
As described above, according to the present invention, a scene section picked up in advance by a broadcast station can be used by a television receiver. Image display restriction circuit Thus, information for preventing an image from being reproduced and displayed correctly is multiplexed with a television signal and transmitted. For this reason, for example, a video scene that is picked up by the broadcast station without the viewer's consciousness and, for example, the child does not want to be shown to the infant, is subjected to processing such as mosaic processing by the television receiver and provided. In this case, processing such as mosaic processing is performed immediately when a scene not desired to be shown to the infant starts, so that the viewer does not need to consciously turn off the power of the television receiver or change the channel.
[0142]
Also, since only the necessary scene section is reliably prevented from being reproduced and displayed correctly, the viewer does not need to turn off the television receiver or change the channel, and is provided by the television program. You won't miss information or lose track of the show.
[0143]
Further, since the image non-display processing for not correctly reproducing and displaying the image such as the mosaic processing is performed on the television receiving apparatus side, it is determined whether or not the viewer displays the screen on which the image non-display processing is performed. It is also possible to control the operation / non-operation of the image non-display processing depending on whether or not the child is watching with the infant or not, or according to the viewer's preference.
[0144]
In addition, in the case of a quiz program or the like, when displaying the answer on the screen, the viewer's selection can be used to control the process of turning on or off the process of hiding the display portion of the answer by selecting the viewer. A TV broadcast program such as an unprecedented quiz program can be realized.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining an example of multiplexing of information relating to a mosaic process in an embodiment of a broadcasting system according to the present invention.
FIG. 2 is a diagram for explaining mosaic position information of information on mosaic processing in one embodiment of the broadcasting system according to the present invention.
FIG. 3 is a block diagram illustrating a configuration of an embodiment of a television receiver according to the present invention.
FIG. 4 is a diagram showing an example of an image on which mosaic processing has not been performed.
FIG. 5 is a diagram showing an example of an image in which a whole screen is subjected to a mosaic process according to an embodiment of the present invention.
FIG. 6 is a diagram showing an example of an image in which the lower third of the screen has been subjected to the mosaic processing according to the embodiment of the present invention.
FIG. 7 is a block diagram for explaining an example of an area signal generation circuit of one embodiment of the television receiver according to the present invention.
FIG. 8 is a waveform chart for explaining the area signal generation circuit of the example of FIG. 4;
FIG. 9 is a diagram for explaining a DTMF signal.
FIG. 10 is a diagram for explaining transmission conditions of a DTMF signal.
FIG. 11 is a block diagram showing a configuration of another embodiment of the television receiver according to the present invention.
FIG. 12 is a flowchart for explaining the entire operation of receiving multiplexed information by a DTMF signal in the embodiment of FIG. 11;
FIG. 13 is a flowchart of a part of the flowchart of FIG. 12;
[Explanation of symbols]
40 Tuner / Decoder
41 audio signal processing unit
42 Video signal processing unit
424 switching circuit
43 Mosaic processing circuit
431 Sampling hold circuit
432 Sampling clock generation circuit
44 Sync separation circuit
50 Mosaic control signal extraction circuit
51 Gate signal generator
52 gate circuit
53 Binarization processing unit
54 Mosaic control signal decoding unit
55 area signal generation circuit
60 logic circuit
70 Control signal generator
80 Remote Commander

Claims (5)

On the television transmitter side,
When a television signal including a video signal is received by the television receiving apparatus, an image corresponding to the video signal is correctly reproduced and displayed, or an image corresponding to the video signal is correctly displayed. Control information indicating whether to reproduce and display is multiplexed and transmitted without modifying the original video signal,
On the television receiver side,
Receiving the television signal, extracting a video signal and control information contained in the television signal,
If the television receiver is set to a mode for correctly reproducing and displaying an image corresponding to the video signal regardless of the state of the control information, the image corresponding to the video signal is correctly reproduced and displayed,
When the television receiver is set to a mode for switching between an image corresponding to the video signal and an image corresponding to the video signal in accordance with a state of the control information, the control information is stored in the video signal. When it indicates that the image corresponding to the video signal is reproduced and displayed correctly, the image corresponding to the video signal is correctly reproduced and displayed, and the control information indicates that the image corresponding to the video signal is not correctly reproduced and displayed. A television signal broadcast system for modifying an original video signal so that an image corresponding to the video signal is not correctly reproduced and displayed. On the television transmitting device side,
To the control information multiplexed with the television signal, position information for designating a partial area in one screen is added,
On the television receiver side,
2. The television signal according to claim 1, wherein an original image signal is deformed only in an image area determined by the position information so that an image corresponding to the image signal is not reproduced and displayed correctly. Broadcasting system. Control information indicating whether to correctly reproduce and display an image corresponding to the video signal or not to correctly reproduce and display the image corresponding to the video signal is multiplexed and transmitted without modifying the original video signal. A television receiver capable of receiving a television signal,
Receiving means for receiving a setting input of a first mode for performing processing on the video signal in accordance with a state of the control information;
Extracting means for receiving the television signal and extracting a video signal and the control information included in the television signal,
Image display restricting means for preventing images from being reproduced and displayed correctly;
When the control mode is set to the first mode through the reception unit and the control information indicates that an image corresponding to the video signal is not to be reproduced and displayed correctly, the image display restriction unit Control means for controlling the image signal to prevent the image corresponding to the video signal from being reproduced and displayed correctly. The accepting unit includes a second mode for correctly reproducing and displaying an image corresponding to the video signal regardless of a state of the control information, and a third mode for forcibly not correctly reproducing and displaying an image corresponding to the video signal. Can be accepted.
The control unit is configured to set the first mode, wherein the control information indicates that the image corresponding to the video signal is not correctly reproduced and displayed, and 4. The television receiving apparatus according to claim 3 , wherein when the setting is set, the image display restricting means is controlled so that an image corresponding to the video signal is not correctly reproduced and displayed. The control information multiplexed with the television signal includes position information for designating a partial area in one screen,
The extracting means extracts the multiplexed position information, and further comprises decoding means for decoding the extracted position information. The screen designated by the position information decoded by the decoding means is provided. The television receiver according to claim 3, wherein a process for preventing an image from being correctly reproduced and displayed is performed only in a part of the upper region.

Images