JPH09200710A - Television transmission/reception system and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the sense of incompatibility to a viewer by enabling the transmission of video signal and data signal by displaying a data signal composed of graphics at a visually recognizable section inside an effective picture, and hiding the data signal when such a signal is received. SOLUTION: A signal received by an antenna 31 is supplied to a reception circuit 32 and demodulated at the reception circuit 32. The demodulated signal is supplied to a data detection/extraction circuit 33 and a video monitor 34. The received signal is projected on the video monitor 34. At the data detection/ extraction circuit 33, the presence/absence of data graphic signal is detected and when the existence of data graphic signal is detected, the data signal is extracted. At a data decode circuit 35, the data signal is decoded into data to be originally reported to the viewer, and transmitted through a data output circuit 36 to the viewer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television transmitter / receiver system and a television receiver used in a television transmitter / receiver system capable of simultaneously transmitting a video signal and a data signal and also capable of transmitting a wide TV identification control signal. Regarding

[0002]

2. Description of the Related Art Conventionally, in a television transmission / reception system capable of simultaneously transmitting a video signal and a data signal, the encoded data is not visually recognizable in a general television receiver which has received it, that is, cannot be displayed. It was inserted in the wrong place. Therefore, the data signal did not reach the eyes of the viewer.

[0003]

However, in general television broadcasting, there are few visually unrecognizable places, and the broadcasting station side or the program producer can freely use the visually unrecognizable places. Had the problem of being extremely difficult.

Further, in a video monitor, a data signal and a video signal are transmitted at the same time by displaying a data signal consisting of a figure in a visually recognizable portion within an effective screen, for example, as shown in Japanese Patent Application No. 7-212687. As described above, a bar code encoded with program-related information data is displayed on a video monitor, the displayed bar code is decoded, and a television transmission / reception system capable of easily making program reservations is realized. For example, in the television receiver used for this, naturally, there is a problem that the figure touches the eyes of the viewer.

Therefore, an object of the present invention is to display a data signal consisting of a figure in a visually recognizable part in an effective screen, and thus, even in a television transmitting / receiving system for transmitting a data signal and a video signal at the same time, this figure is also used. Is to provide a television transmission / reception system which can be kept out of the eyes of a viewer.

It is another object of the present invention to provide a television transmission / reception system for transmitting a data signal by using a scanning line within an effective screen, in order to prevent the data signal from being exposed to the eyes of an observer. An object of the present invention is to provide a television transmission / reception system and a television receiving device capable of reducing discomfort to a viewer when displaying a video signal supplied from the television receiver.

Further, an object of the present invention is to allow a video signal and a data signal to be simultaneously transmitted by encoding and mounting the data signal on a scanning line which does not include a video signal in a letterbox type video signal. ,
A television transmission / reception system capable of enlarging an image on the television receiver side by placing a wide TV identification signal on this scanning line and not displaying the encoded data and the scanning line on which the wide TV identification signal is placed. And to provide a television receiver.

[0008]

According to a first aspect of the present invention, an encoding means for encoding data to be supplied to a viewer and the encoded data can be visually recognized within an effective screen of a video signal. A television transmitter having data inserting means for inserting as a figure or symbol, data detecting means for detecting the encoded figure or symbol, decoding means for decoding the detected figure or symbol into data, and decoded A television transmission / reception system, comprising: a television receiver provided with data output means.

Further, the invention according to claim 3 is a television broadcasting system for transmitting a data signal and a video signal at the same time by including all the data signals in which graphics or symbols are encoded in a visually recognizable effective screen. about,
A television receiving device is provided with data detection means for detecting an encoded figure or symbol, decoding means for decoding the detected figure or symbol into data, and output means for the decoded data.

Even in a television transmission / reception system in which a data signal and a video signal are simultaneously transmitted by displaying a visually recognizable graphic on the effective screen, the graphic can be prevented from being seen by the viewer. .

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an apparatus according to the present invention will be described in detail below with reference to the drawings. First, a television transmission / reception system in which a data signal is transmitted using a scanning line within an effective screen will be described. Since a video monitor is generally used as the video signal output means, it will be referred to as a video monitor hereinafter, but it goes without saying that the same applies to other means. The video signal effective display screen is a portion that is generally displayed on a video monitor. In the case of the NTSC system, it is generally 2 scan lines.
The 2nd to 263rd lines and the 285th to 525th lines are shown. Also PA
In the L method, generally, the 23rd to 314th scanning lines, 336
The 625th line is shown. The information on this scan line is
Generally, it is visually recognized by the viewer.

[0012] In television broadcasting, in a general television receiver, a visually unrecognizable place, that is, a signal area outside the effective display screen is small, and the television broadcasting station or the program producer can freely set it. It was extremely difficult to use. Therefore, insert the data encoded as a figure or symbol in a place that can be used freely by the television broadcasting station or program producer, that is, in the effective screen that can be visually recognized by the viewer, and insert it into a time series. By arranging them in parallel, a television broadcast that enables simultaneous transmission of video signals and data signals is realized.

Hereinafter, a data signal composed of a figure or a symbol created by encoding data to be transmitted to a subject will be referred to as a data figure, and a signal forming the data figure will be referred to as a data figure signal. FIG. 1 is an example of a data figure, and illustrates a bar code data figure. By arranging these barcodes in time series, considerable information can be transmitted. Further, a predetermined pattern for data detection is recorded in a predetermined period of this barcode.

Next, FIG. 2 shows a transmitter in a television transmitter / receiver system which enables simultaneous transmission of a video signal and a data signal by inserting a data figure into an effective screen which can be visually recognized by the viewer. It is a block diagram showing an example. A data signal to be transmitted to the subject is supplied from the input terminal indicated by 1. This data signal is supplied to the data encoding circuit 2, encoded into data to be transmitted, and supplied to the data insertion circuit 4. The data insertion circuit 4 inserts data into the video signal to be transmitted, which is supplied from the input terminal 3, and supplies the data to the transmission circuit 5. In the transmission circuit 5, the supplied signal is modulated and amplified and transmitted through the antenna 6.

A block diagram of an example of the data insertion circuit 4 is shown in FIG. The video signal supplied from the input terminal 11 is supplied to one input terminal of the vertical sync signal separation circuit 12, the horizontal sync signal separation circuit 13 and the switch 15. The vertical sync signal separation circuit 12 separates the vertical sync signal from the supplied video signal, and similarly, the horizontal sync signal separation circuit 13 separates the horizontal sync signal. The output of the vertical synchronizing signal separation circuit 12 and the output of the horizontal synchronizing signal separation circuit 13 are supplied to the counter 14 and the microcomputer 20.

The counter 14 counts the supplied horizontal synchronizing signal, and the count is reset by the input of the vertical synchronizing signal. This gives the scan line number of the input video signal. On the other hand, the data graphic signal is composed of two types of video signals representing 1 or 0, but here, it is composed of a black signal and a white signal. Then, the black video signal is supplied to one input terminal of the switch 19 via the input terminal 17, and the white video signal is supplied to the other input terminal of the switch 19 via the input terminal 18.

The microcomputer 20, depending on the content of data to be transmitted from the supplied horizontal synchronizing signal and vertical synchronizing signal,
The switch 19 is switched, and the switched video signal is supplied to the other input terminal of the switch 15 via the output terminal of the switch 19. The switching of the switch 19 is controlled by the microcomputer 20 using a time interval given by the clock 21. As a result, a data signal consisting of a figure is formed.

The switch 15 supplied with the video signal and the data graphic signal determines whether or not a predetermined data graphic is at the position of the scanning line to be inserted, and switches the switch. This switch 15 is a counter 14
The data graphic signal is inserted on an arbitrary scan line on the video signal by being controlled by. The switched video signal is output from the output terminal 16 via the output terminal of the switch 15.

Here, an example of a television receiving apparatus capable of receiving this broadcast is shown in the block diagram of FIG. In FIG. 4, a video signal and a data signal can be simultaneously received by decoding a data graphic signal inserted in an effective screen which can be visually recognized by the viewer.

The signal received by the antenna 31 is supplied to the receiving circuit 32 and demodulated in the receiving circuit 32.
The demodulated signal is supplied to the data detection / extraction circuit 33 and the video monitor 34. On the video monitor 34, the received signal is projected. Data detection / extraction circuit 33
Then, it is detected whether or not a data graphic signal is present in the supplied video signal, and when it is detected that a data graphic signal is present, the data signal is extracted. The extracted data signal is supplied to the data decoding circuit 35. In the data decoding circuit 35, the data signal is decoded into the data that should be originally transmitted to the viewer. The decoded data is supplied to the data output circuit 36 and transmitted to the viewer.

An example of the data detection / extraction circuit 33 is shown in the block diagram of FIG. The block diagram of this FIG.
This corresponds to the data graphic signal of the bar code shown in FIG. The video signal supplied from the input terminal 41 is supplied to the vertical synchronization signal separation circuit 42, the horizontal synchronization signal separation circuit 43 and the A / D converter 44, and further the output terminal 46.
Transmitted from. The vertical sync signal separation circuit 42 separates the vertical sync signal from the supplied video signal, and similarly, the horizontal sync signal separation circuit 43 separates the horizontal sync signal. The A / D converter 44 outputs 1 when a white video signal is input and outputs 0 when a black video signal is input. That is, this A / D converter 44 has 1 and 0
Has a threshold value capable of discriminating between two types of video signals, and the discrimination result is supplied to the microcomputer 45.

The microcomputer 45 determines from the vertical synchronizing signal and the horizontal synchronizing signal whether or not the scanning line has the data graphic signal inserted, and if it is determined that the scanning line has the data graphic signal inserted, A A data signal is extracted by sampling the input data from the / D converter 44. If the data detection pattern as shown in FIG. 1 cannot be detected from the detected data graphic signal, the extracted data signal is judged not to be data in this system and is discarded. The receiving device in FIG. 4 is provided with a video monitor and a data output circuit separately, but it is also possible to combine them. That is,
The data signal can be output to the video monitor as text information, for example.

Next, FIG. 6 shows a block diagram of an example of the receiving circuit 32 which serves both as a video signal output means and a data signal output means. A video signal is supplied from the input terminal 51 to the OSD (on-screen display) circuit 53. A data signal is supplied to the microcomputer 54 from the input terminal 52.
In the microcomputer 54, the O
The SD circuit 53 is controlled. In the OSD circuit 53,
It is controlled to superimpose the data signal on the supplied video signal, and the superposed video signal is transmitted to the video monitor via the output management 55. That is, the received data signal is superimposed on the video signal as, for example, character information and displayed on the video monitor.

In this way, the television transmission / reception system according to the present invention can be realized. A conceptual diagram of the system described above is shown in FIG. The television broadcasting station 61 broadcasts a television signal on which a data signal consisting of a figure is superimposed, through a transmission antenna 62. On the reception side, a tuner / decoder circuit 64 extracts a data signal from the video signal through a reception antenna 63, and the data signal is superimposed on the video signal to be displayed on the video monitor as character information. Therefore, the viewer can view the data signal as character information by superimposing it on the video signal.

In the above-mentioned television transmitting / receiving system according to the present invention, the data graphic is inserted in the effective screen, so that it can be visually recognized by the viewer. However, it is considered annoying to the viewer.
Therefore, it is an object of the present invention to perform a process invisible to the viewer when the receiver receives this data signal. In the first embodiment of the present invention, the purpose of the present invention is to use a screen enlarging means in order to achieve this object. Hereinafter, a second embodiment of the present invention will be described.

In the second embodiment, as the data graphic, a graphic existing in the right half of the effective screen as shown in FIG. 8 is used as an example. Also in this example, similarly, a predetermined pattern for data detection which is set in advance is written at the head of the data on each scanning line forming the data figure, and this pattern is read by the data detecting / extracting means. Sometimes the existence of data is confirmed.

FIG. 9 shows a block diagram of a first embodiment of a television receiver to which the present invention can be applied.
The signal received by the antenna 71 is supplied to the receiving circuit 72. The reception circuit 72 demodulates the supplied signal, and the demodulated signal is supplied to the data detection / extraction circuit 73 and the image zoom circuit 76. The data detection / extraction circuit 73 detects whether or not a data graphic exists in the supplied video signal. When it is detected that the data graphic exists, the data signal is extracted and supplied to the data decoding circuit 74. . Further, the position where the data graphic signal exists is supplied from the data detection / extraction circuit 73 to the image zoom circuit 76.

In the data decoding circuit 74, the data signal is decoded into data that should be originally transmitted to the viewer, for example, character information. The data decoded into the character information is supplied to the data output circuit 95, and the data is transmitted to the subject. In the image zoom circuit 76, since the position where the data graphic signal exists is supplied from the data detection / extraction circuit 73, the image part where the data graphic does not exist is judged from the signal supplied from the reception circuit 72, and the existence of the data graphic exists. Not enlarged The image part is enlarged. The enlarged image portion is supplied to the video monitor 77 and displayed.

As described above, FIG. 9 shows, in a television transmission / reception system for simultaneously transmitting a video signal and a data signal, when a video signal including a data figure is received, an image portion other than the data figure is enlarged and displayed. It is a block diagram of a television receiver which can be.

A detailed block diagram of an example of the image zoom circuit 76 is shown in FIG. The video signal supplied from the input terminal 81 is supplied to the A / D converter 82. A
The / D converter 82 samples the video signal in order to convert the video signal into information on a pixel-by-pixel basis. This pixel-based information is stored in the memory 83.
The memory 83 is controlled by a memory controller 84 such as input / output address management. The stored pixel information is read when necessary and supplied to the arithmetic circuit 85.

In the arithmetic circuit 85, the output pixel information is calculated from the input pixel information for expanding the input video signal. The calculated pixel information is stored in the memory 86.
The memory 86 is controlled by a memory controller 87 such as input / output address management. The stored pixel information is read out when necessary, and the D / A converter 88 is read.
Supplied to In the D / A converter 88, a video signal is reconstructed from the supplied pixel information and is output via the output terminal 89.

Next, the enlargement processing performed in the arithmetic circuit 85 will be described with reference to FIG. FIG. 11 schematically shows the screen of FIG. 8, where the horizontal length of the entire screen is A and the vertical length is B. The left half (A / 2) in the horizontal direction is the video signal and the right half (A /
2) is a data figure. Therefore, as shown in the figure, the video signal present in the left half must be extended to the entire screen.

However, the number of pieces of pixel information per scanning line is halved, and the distance between pixels in the horizontal direction is
Since the pixel spacing of the input signal is twice as large as that of FIG.
As shown in, the arithmetic circuit 85 calculates the average value of two adjacent pixel information. The calculated pixel information is pixel information between two adjacent pixels. This operation is 1
By performing the operation for all the screens, the number of pixel information per scanning line and the interval thereof are the same as those of the input signal. In addition, this FIG. 12A and FIG.
It is the figure which represented the pixel information stored in and 86 in the frame equivalent to 1 frame typically.

By returning the pixel information to the video signal again, as shown in FIG. 11, a video signal whose horizontal direction is doubled can be created. That is, the left half video signal is doubled in the horizontal direction, and the enlarged image is displayed on the video monitor.

Here, a video signal in which the ratio of the video signal and the data signal on one scanning line is 1: 1 as shown in FIG. 8 is taken as an example, and thus the average value of the adjacent pixel information is obtained. The method was used. However, even if the ratio between the video signal and the data signal is arbitrary, it is clear that the calculation can be performed by adding appropriate weights to some neighboring pixel information and adding them. It is also clear that the same calculation can be performed in the vertical direction.

A method of enlarging a video signal on the entire screen at an arbitrary ratio in the horizontal and vertical directions will be described with reference to FIG. A video signal having a horizontal length of a and a vertical length of b is included in a screen having a horizontal length of A and a vertical length of B. In this case, the horizontal direction is enlarged A / a times, the vertical direction is enlarged B / b times, and the video signal is enlarged over the entire screen.

Next, a second embodiment of the present invention will be described. The second embodiment is, as shown in FIG. 14, received when a data graphic signal is received in a television transmission / reception system which transmits a data graphic signal consisting of a mosaic graphic using a scanning line in an effective screen. This is a television transmission / reception system in which a video signal different from the video signal is output to a video monitor so that the data figure cannot be seen by the viewer. In this FIG. 14, white is set to 1 and black is set to 0 similarly to the figures in FIGS. 1 and 8 described above.
And Furthermore, a predetermined pattern for data detection is written in a predetermined position in this mosaic figure, for example, in the uppermost part of the effective screen.

FIG. 15 shows a second embodiment of the television receiver to which the present invention is applied. Antenna 91
The signal received at is supplied to the receiving circuit 92. The reception circuit 92 demodulates the received signal, and the demodulated signal is supplied to one input terminal of the data detection / extraction circuit 93 and the video switch 94. On the other hand, the video signal generation circuit 95 generates a video signal, and the generated video signal is supplied to the other input terminal of the video switch 94.

The data detection / extraction circuit 93 detects whether or not the data graphic signal is present in the video signal as described above, and when it is detected that the data graphic signal is present, the data signal is extracted. The extracted data signal is supplied to the data decoding circuit 97. When the data detection / extraction circuit 93 detects that a data graphic signal is present, the video switch 94 is controlled so that the video signal supplied from the video signal generation circuit 95 is selected by the video switch 94. It When it is detected that the data graphic signal does not exist, the video switch 94 is controlled so that the video signal supplied from the receiving circuit 92 is selected by the video switch 94.

In the video switch 94, controlled by the data detection / extraction circuit 93, the video signal from the video signal generation circuit 95 or the video signal from the reception circuit 92 is supplied from the output terminal of the video switch 94 to the video monitor 96. . The supplied video signal is displayed on the video monitor 96. In the data decoding circuit 97, the data signal is decoded into data that should be originally transmitted to the viewer, for example, character information, and supplied to the data output circuit 98,
It is transmitted to the viewer.

The data detection / extraction circuit 93 used here is the data detection / extraction circuit 3 shown in FIG.
3 and uses the detailed block diagram shown in FIG.

With the above method, it is possible to prevent the data signal from touching the eyes of a viewer in a television transmission / reception system that transmits the data signal using the scanning lines within the effective screen. Was shown. The video signal supplied from the video signal generation circuit 95 used in the above example may be any video signal. A simple example is to use a blueback signal used by an OSD device or the like.

If a still image signal is prepared in advance and is output over a plurality of consecutive frames, the same effect as a so-called screen saver can be obtained. Further, at this time, it is needless to say that the same effect can be obtained by continuously displaying not only still images but also continuous still images that change little by little, or displaying moving images.

However, when a data signal is received, a video signal irrelevant to the video signals received so far is inserted, and it is assumed that the viewer feels uncomfortable. Therefore, in the third embodiment described below, when a data signal is received, a video signal related to the video signal received so far is inserted in order to prevent a sense of discomfort that may be given to the viewer. To do. More specifically, the video signal just before receiving the data signal is inserted.

FIG. 16 shows a block diagram of the third embodiment of the television receiving apparatus to which the present invention is applied.
The signal received by the antenna 101 is supplied to the receiving circuit 102. In the receiving circuit 102, the supplied signal is demodulated, and the demodulated signal is the data detection / extraction circuit 103.
And the video signal storage / generation circuit 104.
The data detection / extraction circuit 103 detects whether or not a data graphic signal is present in the supplied video signal, and when it is detected that a data graphic signal is present, the data signal is extracted. The extracted data signal is supplied to the data decoding circuit 105. In the data detection / extraction circuit 103, an identification signal indicating the presence / absence of a data graphic signal is supplied to the video signal storage / generation circuit 104.

When the video signal storage / generation circuit 104 detects that the data graphic signal does not exist, the video signal frame is stored and the video monitor 107 is also stored.
Supplied to Further, when it is detected that the data graphic signal exists, this video signal is not stored, and the frame of the already stored video signal is reproduced and supplied to the video monitor 107. The supplied video signal is displayed on the video monitor 107. In the data decoding circuit 105, the data that should originally be transmitted to the subject,
For example, the data output circuit 1 is decoded into character information.
06 is supplied. In the data output circuit 106, the supplied data is transmitted to the subject.

As described above, the third embodiment shown in FIG. 16 is a television transmission / reception system which transmits a data signal by using a scanning line in an effective screen, and is the most video signal without a data graphic signal. It is characterized in that a new frame is stored, and when the data graphic signal is received, the stored video signal is output to make the data graphic invisible to the viewer. .

Next, a detailed block diagram of an example of the video signal storage / generation circuit 104 is shown in FIG. Input terminal 11
The video signal supplied from the receiving circuit 102 via 1 is supplied to the A / D converter 112, and the A / D converter 11
At 2, it is converted into a pixel signal. The converted pixel signal is supplied to the memory 113 and stored therein. Memory 1
The pixel signal stored in 13 is supplied to the D / A converter 116 and converted into a video signal. This video signal is
It is supplied to the video monitor 107 via the output terminal 117. Further, the identification signal indicating the presence / absence of the data graphic supplied from the data detection / extraction circuit 103 via the input terminal 114 is supplied to the memory controller 115. The memory controller 115 controls the input / output address management of the signal in the memory 113, and also controls the pixel signal of the video signal to be stored in the memory 113 only when the video signal has no data graphic. Be seen.

An example of the control method of the memory controller 115 will be described with reference to the flowchart of FIG. The control of this flowchart is performed from step S1, and in step S1, an identification signal indicating the presence or absence of a data graphic signal from the data detection / extraction circuit 103 is determined. If it is determined that the data graphic signal exists, the control proceeds to step S3. If it is determined that the data graphic signal does not exist, the control proceeds to step S2. In step S2, the video signal without the data graphic signal is stored in the memory 113. Then, in step S3, the memory 113
Is output to the video monitor 107, and control is returned to step S1 again.

FIG. 19 is a schematic diagram showing an example of the effect of the third embodiment. As shown in FIG. 19A, a television broadcast in which a data graphic signal exists between video signals is received and displayed on a video monitor. However, by using this third embodiment, as shown in FIG. 19B, the video signal on the screen immediately preceding the data graphic signal is displayed at the position where the data graphic signal exists. That is, from the perspective of the viewer, the video signal from which the data graphic signal has been removed is seen.

The same applies to the case shown in FIG. 20. In FIG. 20A, a plurality of data graphic signals are present between video signals. However, as shown in FIG. The data is displayed at the position of the graphic signal. In this figure, the first video signal is displayed at the position of the data graphic signal for 5 frames, and the next video signal is displayed at the position of the data graphic signal for 6 frames. This represents a time-lapse movie. That is, it is shown that by using the third embodiment, it is possible to display a frame-dropped moving image only during the time of data signal transmission.

In the third embodiment, since the image to be stored is one frame, the output is a series of still images. However, it becomes possible to store several frames, so that the output is performed. It goes without saying that can obtain the same effect as in moving images.

By using the above method, the immediately preceding video signal can be output when the data signal is received,
Not only can the data signal be hidden from the viewer,
In that case, the discomfort can be reduced.

Next, as shown in FIG. 21, a fourth embodiment of the television transmission / reception system using a letterbox format video signal will be described. Normal aspect ratio 4:
When the 3rd video monitor is used, the letterbox format video signal is displayed as shown in FIG. 21A, and when the 16: 9 aspect ratio video monitor is used,
The letterbox format video signal is displayed as shown in FIG. 21B. When this video monitor is compatible with wide TV, the display screen is automatically zoomed up in response to the wide TV identification control signal, and the letterbox format video signal is displayed as shown in FIG. 21C. This is the enlargement (zoom) function.

The wide TV identification control signal is a control signal indicating that the video signal to be sent is in the letterbox format, and any method can be used as long as it can indicate that it is the control signal. The EDTVII identification control signal is one of the wide TV identification control signals that are currently in practical use.

FIG. 22 shows an EDTVII letterbox format video signal. In this EDTVII,
Identification signals are carried on lines 22 and 285.
In the letterbox format video signal, there are scanning lines above and below which do not include the video signal. The part not including the video signal is called a non-image part, and the part including the video signal is called a main image part.

FIG. 23 shows the identification signal bits and identification contents carried on the lines 22 and 285. That is, when bit 3 (B03) of the identification signal is "1", it indicates that the video signal is a letterbox format as shown in FIG. 21A, and a television receiving device corresponding to this identification signal displays a screen image. Is enlarged and displayed as shown in FIGS. 21B and 21C.

Hereinafter, as the wide TV identification control signal, E
Although the DTVII identification control signal will be described as an example, it goes without saying that any method can be used to obtain the same effect as long as it can be recognized that a letterbox format video signal is being received. Yes. In addition, EDTVII compatible TV and E
There are two types of TVs that support the DTVII identification control signal.

In EDTVII broadcasts, in addition to the identification control signals being present on lines 22 and 285, EDTVII
Vertical time enhancement signal VT, which is the image enhancement signal of
It is a condition that at least one signal is included in the vertical reinforcement signal VH or the horizontal reinforcement signal HH. EDTVII
The compatible TV means a wide TV having a circuit capable of improving the image quality by the expansion function and the enhancement signal in response to both the identification control signal and the image enhancement signal, and only the expansion function responding only to the identification control signal. Is referred to as an EDTVII identification control signal compatible TV. However, in this fourth embodiment, the expected effect can be obtained with any TV, so both will be collectively referred to as a wide TV.

FIG. 24 shows a fourth embodiment of the television transmitter of the television transmitter / receiver system. 24. FIG. 24 shows EDTVII identification control that enables simultaneous transmission of a video signal and a data signal by placing a data signal encoded on a scanning line, that is, a non-image portion, that does not include a video signal of a letterbox format video signal. It is a video transmission device capable of inserting a signal. A data signal, which is data that is to be transmitted to the subject from the input terminal 131, is supplied to the data encoding circuit 132. The data encoding circuit 132 converts the data into data to be transmitted, and the converted data is supplied to the data insertion circuit 134.

In the data insertion circuit 134, the input terminal 13
Data is inserted into the letter-box format video signal supplied from the H.3. That is, the video signal carrying the encoded data in the non-picture part of the letterbox type video signal is supplied to the EDTVII identification control signal insertion circuit 135. In the EDTVII identification control signal circuit 135, the EDTVII identification control signal is inserted into the video signal and supplied to the transmission circuit 136. In the transmission circuit 136, the supplied video signal is modulated and amplified, and the modulated and amplified video signal is transmitted through the antenna 137.

The data insertion circuit 13 used here
Reference numeral 4 is the same as the data insertion circuit 4 shown in FIG. 2 described above, and a circuit configuration similar to that of the detailed block diagram shown in FIG. 3 can be used.

Next, FIG. 25 is an example of a video signal in which a data figure signal encoded in a bar code is inserted into a scanning line which does not include a video signal of a letterbox format video signal, that is, a non-image portion. . In this example, a predetermined pattern for data detection is first written in order to show that the data graphic signal is placed on the scanning line. The data detection circuit confirms the presence of the data figure by detecting the presence or absence of this pattern. The effect of this embodiment is that the data inserted in the non-image part, that is, any encoded figure can be processed in the same manner, so that the video signal and the data signal can be transmitted at the same time, and at the same time, the non-image part can be transmitted. It goes without saying that by mounting the wide TV identification control signal on the section, the image is enlarged by the television receiver and the scanning line on which this data is mounted is not displayed. Hereinafter, description will be made by using a barcode as an example.

FIG. 26 shows a fourth embodiment of a television receiver to which the present invention can be applied. This FIG.
Is a scanning line that does not include a video signal of a letterbox format video signal, that is, a data signal encoded in a non-picture portion is extracted, and further, an EDTVII identification control signal causes the receiver to enlarge (zoom) the image, It is a block diagram of the television receiver which can implement | achieve not displaying the scanning line in which the data signal is mounted on a screen.

The signal received by the antenna 161 is supplied to the receiving circuit 162. The signal supplied to the reception circuit 162 is demodulated into a video signal and supplied to the data detection / extraction circuit 163, the EDTVII identification control signal detection circuit 166, and the screen zoom circuit 167. The data detection / extraction circuit 163 detects whether or not a data figure is present in the supplied video signal, and when the data figure is present in the video signal, the data signal is extracted. In the data decoding circuit 164, the extracted data signal is decoded into data that should be originally transmitted to the viewer, for example, character information, and is transmitted to the viewer via the data output circuit 165.

On the other hand, the EDTVII identification control signal detection circuit 1
66, ED on lines 22 and 285 of the video signal
It is detected whether or not the TVII identification control signal is present. Presence or absence of the detected EDTVII identification control signal is supplied to the screen zoom circuit 167. Screen zoom means 167
Then, when the EDTVII identification control signal is present, the video signal supplied from the reception circuit 162 is expanded and supplied to the wide TV 168. When the EDTVII identification control signal is not present, the video signal supplied from the receiving circuit 162 is processed by the wide TV 168 without any processing.
Supplied to

Data detection / extraction circuit 1 used here
63 is the data detection / extraction circuit 33 shown in FIG.
The same circuit configuration can be used for the block diagram shown in FIG.

From the above description, it has been shown that the EDTVII identification control signal can be used to realize a television transmission / reception system in which the data inserted in the non-image part, that is, the encoded figure is not shown to the viewer.

However, the television broadcast generated as described above is not the EDTVII broadcast. As described above, the condition that the video signal is the EDTVII signal is that the identification control signal is present on the lines 22 and 285, and the vertical time enhancement signal VT and the vertical enhancement signal VH which are the image enhancement signals of the EDTVII. And at least one signal is included from the horizontal reinforcement signals HH.

Returning to FIG. 21 again, in the letterbox format video signal, the non-image portion exists above and below as described above. In the EDTVII signal, the vertical time enhancement signal VT and the vertical enhancement signal VH are included in the EDTVII image enhancement signal.
Can be placed. In addition, in the main picture part, the horizontal reinforcement signal H of the image reinforcement signals of the EDTVII is displayed together with the video signal.
H can be placed. Therefore, in EDTVII broadcasting in the letterbox format, as shown in FIG. 27, at least one of the identification control signals B08, B09, and B10 is "1", that is, "present".

In the fourth embodiment, since the data signal is placed on either or both of the upper and lower non-image parts, the vertical time reinforcement signal VT or the vertical reinforcement signal VH is applied to the normal ED.
It is impossible to carry the same as the TVII letterbox format video signal. However, even if the present invention is applied, the signal of the main picture portion is not modified, so that the horizontal reinforcement signal HH can be carried in the same manner as the ordinary EDTVII letterbox format video signal. Therefore, the identification control signal is present on lines 22 and 285,
And the horizontal reinforcement signal HH among the image reinforcement signals of EDTVII
Will be placed on the main image section and can be transmitted. Therefore, this television broadcast is EDTVII broadcast. The identification control signal at that time has a content as shown in FIG.

Thus, the fourth embodiment is the EDT
The present invention can be applied not only to the VII identification control signal compatible television receiver but also to the EDTVII compatible television receiver itself.

In the above embodiment, as an example of the encoded data, as shown in FIG. 1, FIG. 8, FIG. 14 or FIG. 25, the data graphic signal inserted at the predetermined position is given. This is to reduce the load on the data detecting means. If the data detecting means can detect a predetermined pattern for detecting data encoded from the data signal inserted in the effective screen, the data pattern can be placed at any position. Can be inserted. Similarly, it can be inserted at any position in the non-image area. That is, it goes without saying that the same effect can be obtained in the receiver to which the present invention can be applied by using the data figure including the predetermined pattern for data detection.

Further, in the above embodiment, as an example of encoded data, FIG. 1, FIG. 8, FIG. 14 or FIG.
Although the data graphic signal having the shape as shown in FIG. 1 has been mentioned, the above-mentioned television broadcasting can be realized even if it has any shape capable of transmitting information. That is, it goes without saying that the same effect can be obtained with a receiver to which the present invention is applied regardless of the shape.

Further, in the above-mentioned embodiment, the white signal or the black signal is mentioned as the signal representing 1 or 0 constituting the data figure, but if it is two signals which can be discriminated by an appropriate means. Needless to say, the above-mentioned television broadcast can be realized by using any signal, that is, the same effect can be obtained by the receiver to which the present invention is applied.

[0076]

According to the present invention, even in a television transmission / reception system in which a data signal and a video signal are simultaneously transmitted by displaying a visually recognizable graphic in the effective screen, this graphic is visible to the eyes of the viewer. You can avoid touching.

Further, according to the present invention, in a television transmission / reception system for transmitting a data signal by using a scanning line in an effective screen, in order to prevent the data signal from being seen by a viewer, When displaying a video signal supplied from the outside, it is possible to reduce a sense of discomfort to the viewer.

Further, according to the present invention, in the letterbox format video signal, the video signal and the data signal are encoded and placed on the scanning line not containing the video signal, that is, on the non-image portion. A television that enables transmission at the same time, and at the same time, puts a wide TV identification control signal on this non-picture portion so that the image is enlarged by the television receiver and the scanning line carrying this data is not displayed. John transmission / reception system can be realized.

[Brief description of drawings]

FIG. 1 is an example of a data figure composed of a barcode displayed on a video monitor.

FIG. 2 is a block diagram of an example of a television transmitter according to the present invention.

FIG. 3 is a block diagram of an example of a data insertion circuit according to the present invention.

FIG. 4 is a block diagram of an example of a television receiver according to the present invention.

FIG. 5 is a block diagram of an example of a data detection / extraction circuit according to the present invention.

FIG. 6 is a block diagram of an example of a receiving circuit according to the present invention.

FIG. 7 is a conceptual diagram of an example of a television transmitting / receiving system according to the present invention.

FIG. 8 is an example of a data graphic displayed on a video monitor to which the present invention can be applied.

FIG. 9 is a block diagram showing a first embodiment of a television receiving apparatus to which the present invention can be applied.

FIG. 10 is a block diagram of an example of an image zoom circuit according to the present invention.

FIG. 11 is a schematic diagram used for explaining a calculation means according to the present invention.

FIG. 12 is a schematic diagram used for explaining a calculation means according to the present invention.

FIG. 13 is a schematic diagram used for explaining a calculation means according to the present invention.

FIG. 14 is an example of a data graphic displayed on a video monitor to which the present invention can be applied.

FIG. 15 is a block diagram showing a second embodiment of a television receiver to which the present invention can be applied.

FIG. 16 is a block diagram showing a third embodiment of a television receiver to which the present invention can be applied.

FIG. 17 is a block diagram of an example of a video signal storage / generation circuit according to the present invention.

FIG. 18 is a flowchart showing an example of control of the memory controller according to the present invention.

FIG. 19 is a schematic diagram showing an example of the effect of the present invention.

FIG. 20 is a schematic view of another example of the effect of the present invention.

FIG. 21 is an example of a letterbox format video signal to which the present invention can be applied.

FIG. 22 is an example of a letter box format video signal of EDTVII.

FIG. 23 is an example of bit positions and identification contents of an EDTVII control signal.

FIG. 24 is a block diagram showing a fourth embodiment of a television transmitter to which the invention can be applied.

FIG. 25 is an example of an EDTVII letterbox format video signal to which the present invention can be applied.

FIG. 26 is a block diagram showing a fourth embodiment of a television receiver to which the present invention can be applied.

FIG. 27 is an example of an identification control signal of a letterbox format EDTVII broadcast.

[Fig. 28] Fig. 28 is an example of an identification control signal of EDTVII broadcasting in a letterbox format to which the present invention can be applied.

[Explanation of symbols]

31 ... Antenna, 32 ... Reception circuit, 33 ...
Data detection / extraction circuit, 34 ... Video monitor, 35
... Data decoding circuit, 36 ... Data output circuit

Claims (14)

[Claims] 1. An encoding means for encoding data to be supplied to a viewer, and a data inserting means for inserting the encoded data as a visually recognizable figure or symbol in an effective screen of a video signal. Television including a television transmitter, data detecting means for detecting the encoded graphic or symbol, decoding means for decoding the detected graphic or symbol into data, and output means for the decoded data A television transmission / reception system comprising a television receiver. 2. The television transmission / reception system according to claim 1, wherein an image portion other than the visually recognizable graphic or symbol is enlarged and displayed in the effective screen. 3. A television broadcasting system for transmitting a data signal and a video signal at the same time by having a data signal in which a figure or a symbol is encoded in a visually recognizable effective screen, wherein the encoded figure or A television receiving apparatus comprising: a data detecting means for detecting a symbol; a decoding means for decoding the detected figure or symbol into data; and an outputting means for outputting the decoded data. 4. An encoding means for encoding data to be supplied to a viewer, and a data inserting means for inserting the encoded data as a visually recognizable figure or symbol in an effective screen of a video signal. Television transmitter, data detecting means for detecting the encoded graphic or symbol, and video signal for outputting another video signal prepared in advance when the graphic or symbol is detected by the data detecting means. A television transmission / reception system comprising: a television receiving device having an output means. 5. The television transmitting / receiving system according to claim 3, wherein the television receiving device detects the encoded graphic or symbol, and the data detecting means detects the graphic or symbol. If it is detected consecutively in a frame, 1
A television transmission / reception system, comprising: a television receiver provided with still image signal output means for continuously outputting still image signals of frames. 6. The television transmitting / receiving system according to claim 3, wherein the television receiving device detects the encoded figure or symbol, and the data detecting section detects the figure or symbol. A television transmission / reception device comprising: a television receiving device provided with a moving image signal output means for outputting moving image signals of several frames prepared in advance one frame at a time when detected in consecutive frames. system. 7. The television transmission / reception system according to claim 3, wherein the television receiving device detects the encoded figure or symbol, and the data detecting section detects the figure or symbol. A television receiver provided with a one-frame still image signal output means for continuously changing one frame of a still image signal prepared in advance and continuously outputting one frame at a time when detected in a plurality of consecutive frames. A television transmission / reception system comprising: 8. The television transmission / reception system according to claim 3, wherein the television receiving device stores a frame of the received video signal, and stores encoded data for detecting the figure or symbol. Television reception comprising detection means and demodulation / output means for demodulating and outputting the video signal stored immediately before the graphic or symbol when the graphic or symbol is detected by the data detecting means. A television transmission / reception system comprising a device. 9. The television transmission / reception system according to claim 3, wherein the television receiving device is connected to a plurality of frame storage means for storing a few frames of the received video signal, and the stored video signal is continuous. Demodulating / outputting means for demodulating and outputting a video signal, data detecting means for detecting the encoded figure or symbol, and when the figure or symbol is detected by the data detecting means, the figure or symbol A television transmission / reception system, wherein the video signals of several frames stored immediately before are output from the demodulation / output means. 10. A data signal in which a figure or a symbol is encoded is entirely included in a visually recognizable effective screen,
For a television broadcasting system that simultaneously transmits the data signal and the video signal, data detection means for detecting the encoded figure or symbol, and if the figure or symbol is detected by the data detection means, prepare in advance. And a video signal output means for outputting the other video signal. 11. Encoding means for encoding data to be supplied to a viewer, and data inserting means for carrying the encoded data on a scanning line that does not include a video signal in a letterbox format video signal, A television transmitter including a wide TV identification control signal inserting means for inserting a wide TV identification control signal into a scanning line different from the scanning line; a data detecting means for detecting the encoded data; Data extracting means for extracting data; decoding means for decoding the extracted data; output means for the decoded data; wide TV identification control signal detecting means for detecting the wide TV identification control signal; And a screen zoom means controlled by the wide TV identification control signal described above. Television transmission and reception system, characterized by comprising a down receiver. 12. Encoding means for encoding data to be supplied to a subject, and data inserting means for carrying the encoded data on a scanning line not including a video signal in a letterbox format video signal, A television transmitter including an EDTVII identification control signal inserting means for inserting an EDTVII identification control signal into a scanning line different from the scanning line, a data detecting means for detecting the encoded data, and the detected data. Data extracting means for extracting, decoding means for decoding the extracted data, output means for the decoded data, EDTVII identification control signal detecting means for detecting the EDTVII identification control signal, and EDTVII detected Television equipped with a screen zoom means controlled by an identification control signal A television transmission / reception system comprising a receiving device. 13. The television transmission / reception system according to claim 11, further comprising a horizontal reinforcement signal inserted as an image reinforcement signal. 14. A data signal in which a figure or a symbol is encoded is entirely included in a visually recognizable effective screen,
Regarding a television broadcasting system that simultaneously transmits the data signal and the video signal, data detecting means for detecting the encoded data, data extracting means for extracting the detected data, and decoding the extracted data Decoding means, output means for the decoded data, wide TV identification control signal detecting means for detecting the wide TV identification control signal, and screen zoom means controlled by the detected wide TV identification control signal Television receiver equipped with.