JPH0955921A - ISDB transmitter and receiver thereof - Google Patents

Abstract

(57) [Abstract] [Problem] To make an image at an arbitrary position enlarged so that it can be enjoyed. SOLUTION: In an ISDB receiver 40 which receives a packetized and multiplexed ISDB broadcast signal after digitizing various main information such as video, audio, data, etc. together with additional information such as control information, a receiver is provided. Is an ISDB tuner 46, a decoding means 52 for main information, image information for enlarged display and additional information, an output video control section 54 for synthesizing and separating the main information and supplying the additional information, and its control section 58. Have. The additional information is supplied to the control unit, and when the pointing address is designated by the user, a match between this pointing address and the transmitted pointing address is searched for, and the divided image or subject designated by the search is It is enlarged and displayed as the size of the screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter suitable for application to an ISDB broadcasting system or the like and a receiver thereof. Specifically, by transmitting not only the image information forming one screen as the image information but also the image information capable of enlarging and displaying the image of the specific area,
A part of the image displayed on the screen can be enlarged and displayed at any timing without deterioration of the image quality.

[0002]

2. Description of the Related Art With the development of digital technology, an interactive integrated digital broadcasting system (ISD) that digitizes various information including broadcasting signals in the broadcasting world
B (Integrated Services Digital Broadcasting) system is being researched and developed.

Specifically, the ISDB system is a multi-channel system including current broadcast signals (standard television signals, high-definition signals), data such as software and facsimiles, and voice, characters, figures, images and the like. This is a broadcasting system in which media information is digitized (encoded), integrated and multiplexed, and then subjected to modulation processing that matches the transmission mode and then transmitted and received.

When various kinds of information including a broadcast signal are integrated and multiplexed, in addition to these pieces of information, additional information used as control information on the receiving side can be simultaneously integrated and multiplexed and transmitted. The integrated ISDB broadcast signal (digital signal) is transmitted using a terrestrial wave, a satellite wave, an optical cable, or the like.

On the receiving terminal side, by receiving the integrated ISDB broadcast signal and discriminating the target signal, the signal can be displayed on the monitor and can be enjoyed as a normal television broadcast. It can be used to record (store) or transfer to another terminal.
Further, if the received additional information is used, the received information can be used according to the user's preference such as monitor control, recording control, and processing control for the monitored image. That is, it is possible to construct an interactive broadcasting system.

[0006]

Therefore, this ISD
If the B system is used, various additional information will be transmitted,
The more diverse, the better the service content for users,
A more interactive broadcasting system can be built.

In the current broadcasting system, the received broadcast signal is simply received / demodulated and viewed on a television monitor or the like, which is a passive / one-sided system, so that the enjoyment of the user is limited. Will be things. For example, there are times when it is desired to magnify a part of the image being monitored on the television. This is because there are times when the partial composition is more attractive than the overall composition.

Such partial and local partial enlargement processing of the image cannot be realized even in the current system. However, in order to perform this partial enlargement processing, an area is designated, and the image information is subjected to interpolation or the like for enlarged display, so that not only the scale of the enlarged display processing apparatus becomes large, but also the object is limited. I dislike it. Further, although enlarged display processing is possible for a still image, not only is there much information to be processed for a moving image, but the enlargement processing speed is slow and unrealistic. Further, since an enlarged image is obtained by interpolation processing, its resolution is also a problem.

Therefore, the present invention has been made so as to achieve such a problem, and not only image information constituting one screen as image information but also image information capable of enlarging and displaying an image in a specific area thereof. By simultaneously transmitting the same, a part of the image displayed on the screen regardless of a moving image or a still image can be enlarged and displayed at any timing without deterioration of image quality.

[0010]

In order to solve the above problems, in the ISDB transmission apparatus according to the present invention described in claim 1, various main information such as video, audio, data, etc. are added to the control information. In an ISDB transmitter that transmits a packetized and multiplexed ISDB broadcast signal after digitizing it together with information, one screen image is displayed as the main information.
Enlarged display image information for n channels capable of enlarging and displaying each divided image in one screen size is digitized together with main image information and multiplexed, and at which division position on one screen. It is characterized in that pointing address information indicating that is digitized as additional information and multiplexed.

The ISD according to the present invention described in claim 2
In the B transmitter, the pointing address information is a coordinate indicating a screen division position.

The ISD according to the present invention as defined in claim 3
In the B transmitter, the ISDB transmitter is configured to transmit various main information such as video, audio, and data together with additional information such as control information, and then transmit a packetized and multiplexed ISDB broadcast signal. ,
When the above-mentioned main information is displayed on the screen, a pointing address on the screen is attached to one or more main subjects in the displayed image, and the subject to which the pointing address is attached is enlarged and displayed on one screen. The image interpolation information is transmitted using the channels of the number of pointing addresses, and the pointing address information is transmitted as additional information.

ISD according to the present invention described in claim 4
In the B transmitter, the image interpolation information is transmitted as additional information together with the pointing address information.

The ISD according to the present invention described in claim 5
In the B receiver, the ISDB receiver receives a packetized and multiplexed ISDB broadcast signal after digitizing various main information such as video, audio, and data together with additional information such as control information. The apparatus is provided with an ISDB tuner, a decoding means for the main information, the image information for enlarged display and additional information, a screen synthesizing section for synthesizing and separating the main information and supplying the additional information, and a control section thereof. When the pointing address is designated by the user while the additional information is supplied to the control unit, the divided image or the subject designated by the pointing address is enlarged and displayed. Characterize.

The ISD according to the present invention described in claim 6
In the B receiver, when the pointing address is designated, the enlarged display image information of the channel including the pointing address is selected and enlarged.

The ISD according to the present invention described in claim 7
In the B receiver, the pointing address is designated by a cursor displayed on the screen, and the screen division position or the subject position is specified based on the coordinates of the cursor position. To do.

The ISD according to the present invention according to claim 8
In enlarging and displaying the image specified by using the image interpolation information in the receiver for B, the image interpolation information related to the pointing address specified by the cursor is selected and displayed on the screen specified by the cursor. The enlarged display image is generated by adding the image interpolation information to the subject information of 1.

The video screen is divided into n in advance, and when each divided area is designated, the image belonging to the designated area is enlarged and displayed. Therefore, on the transmitting side, in addition to the video information for one screen, 1 corresponding to each image divided into n
Video information for the screen is transmitted at the same time. Therefore, the transmitting side transmits the video information corresponding to one screen by using the (n + 1) channels. The divided area can be specified by moving the cursor.

In this way, the enlarged image of the designated area can be immediately displayed, and the resolution does not deteriorate due to the enlarged display. The position of the designated cursor on the screen determines the coordinates of the cursor position, and the image of the channel including the coordinates is selected.

In this embodiment, the area to be enlarged and displayed is predetermined, so that an arbitrary image cannot be enlarged and displayed. In order to realize this, for example, a pointing address (subject coordinates) is attached in advance to a subject (single or plural) such as a main character. The value of this pointing address changes according to the movement of the subject. Sometimes it disappears from the screen. This is because it corresponds to the movement of the subject.

The pointing address and the identifier of the subject (keywords such as the name of a character and the name of an actor) are associated with each other. At the same time, image interpolation information for enlarging and displaying these objects in the size of one screen is also transmitted at the same time. The user specifies a pointing address or an identifier. Search for an image in which the specified pointing address or identifier matches the transmitted pointing address or identifier, and if they match, use the corresponding interpolation information to enlarge the image of the subject by one screen size. indicate. In this way, as long as the pointing address exists, the subject is always displayed in an enlarged size regardless of the position of the subject on the screen. Due to the use of the image interpolation information, the resolution does not deteriorate so much even when enlarged and displayed.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the ISDB according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION An embodiment of a transmission device for mobile use and a receiving device thereof will be described in detail with reference to the drawings.

FIG. 1 is a system diagram of an essential part showing an embodiment of an ISDB transmission device 10 according to the present invention. In this example, as main information to be integrated and transmitted, for convenience of explanation,
A standard television signal and a broadcast signal of a multi-channel multiplexed program for transmitting the same program using a plurality of channels are assumed. Additional information such as control information is added to each of them and multiplexed. Various types of additional information can be considered. A time code or the like can be considered for the standard television signal.

Referring to FIG. 1, the terminal 12a is supplied with the video signal SVN of the standard television signal, and the terminal 12b is supplied with the audio signal SAN accompanying it, and the encoding unit 14 appropriately compresses the signal. Encoding processing is performed.
The additional information generating means 16 operates in synchronization with this encoding process to generate additional information such as control information. In this example, since the time code is exemplified as the additional information, it is configured as the time code generator 16. The encoded standard television signal and the time code TC are multiplexed by the multiplexer 20.
And is multiplexed with other information.

In addition to standard television signals, sources include broadcast signals for multi-channel multiple programs that can be enlarged and displayed. In the following description, two methods will be exemplified as methods for enlarging and displaying. One is a method in which the screen is divided into n in advance and each divided area is designated to enlarge and display the image in the designated divided area.

In this case, the number of multiplex channels used for the same program is (n + 1). For example, when the screen is divided into four as shown in FIG. 2, in addition to the video information for one screen (main video material), four pieces of video information (divided video) for expanding and displaying the four-divided information on one screen are displayed. This is because the material is required. FIG. 1 shows an embodiment for realizing the first method.

Assuming these, there are five source sources as the video material, and the input terminal 24 for one channel.
m and 26m are supplied with the main video material, and the remaining four channels are supplied with corresponding divided video materials to the input terminals 24a to 24d and 26a to 26d. FIG. 2 shows an image of the main image material, and FIG. 3 shows an enlarged image of the image material displayed in the third divided area of the divided image material.

The video materials SM and S1 to S4 are video signals SMV and S1V to S4V and audio signals SMA and S1A, respectively.
~ S4A. The image materials S1 to S4 are subjected to the same encoding processing as described above by the corresponding encoding units 22M and 22A to 22D.

The additional information generating means 28M, 28A to 28D are activated in synchronization with this encoding process, and the video material S
Additional information suitable for M and S1 to S4 is generated. The additional information for the main video material SM includes, for example, coordinate data of the midpoint p of the divided area (see FIG. 2). This coordinate data p indicates a reference coordinate value. Divided video material S1 to S4
With respect to, the minimum and maximum coordinate data in each area can be cited as additional information.

The coded information and the additional information obtained from each are multiplexed in the multiplexing unit 20 shown in FIG. The multiplexing unit 20 performs, for example, a process of packetizing each of the coded information and multiplexing the coded information for error correction on a transmission frame basis to form a bitstream. The above-mentioned types of additional information and main information can be inserted into the header (packet header) of the packetized packet, or can be inserted into the non-video period (blanking period or the like).

The multiplexed data is ISD in a transmission form suitable for transmission means (for example, a broadcasting satellite) in the transmission unit 34.
After being modulated into the B broadcast signal, the transmitting antenna (parabolic antenna) 3 is passed through the up converter 36 in this example.
At 8, it is transmitted to the broadcasting satellite.

FIG. 4 shows an example of a receiver 40 according to the present invention for receiving the ISDB broadcast signal as described above.

The satellite wave received by the receiving antenna (parabolic antenna) 42 is 1 GHz by the down converter 44.
The signal is down-converted to the z band and then supplied to the ISDB tuner 46 for channel selection processing. Therefore, the ISDB broadcast signal of the specific channel including the character broadcast is selected by the channel selection signal SC from the terminal 48.

The selected ISDB broadcast signal is supplied to the signal separation unit 50 and separated into the original main information and the additional information. For example, when a specific channel of a standard television signal is selected, it is separated into a standard television signal and additional information (time code etc.) associated with this specific channel.

The separated main information is supplied to the decoding unit 52 for decoding, and the decoding unit 52 is composed of at least (n + 1) decoding units 52A to 52N.
As described above, when one program is configured by 5 channel multiplexing, at least five decoding units 5
2A to 52E are used, the video materials SM and S1 to S4 of the corresponding channels are supplied, and the decoding processing is simultaneously performed.

Since the decoding section 52 is configured to be commonly used for the main information, any one of the predetermined decoding sections 52, for example 52A, is selected when the program is not a multi-channel multiplexed program. Become.

The decoded video signals of the video material are output video control units 5 each composed of a frame memory or the like.
4 is supplied. In the case of the embodiment of FIG. 1, the output video control unit 54 may have a simple switcher configuration. The additional information separated by the signal separation unit 50 is decoded by the dedicated decoding unit 56 and then supplied to the output video control unit 54 and the control unit 58, and the control from the control unit 58 is performed with reference to the obtained additional information. Video output control processing is performed by the output video control unit 54 based on the signal, and the result is displayed on the television monitor 60. As an example of video output control, which will be described later, the audio signal decoded by the decoding unit 52 described above is selected by the audio processing unit 62 as an audio signal (main audio signal or sub audio signal) corresponding to the monitored image content. This is emitted from the speaker 66 via the amplifier 64.

The control unit 58 composed of a microcomputer generates a control signal for changing the display mode and selecting the monitor contents by remote control from the commander 68. The commander 68 includes, for example, a power switch 70 and a ten-key (10 key) 7 for channel selection as shown in FIG.
2. A station selection switch 74 and a volume switch 76 are sequentially provided, and a display mode selection switch 78 for the monitor 60 is further provided. The cursor key 80 is a key for moving the cursor K (see FIG. 2) displayed on the screen, and is used for designating a divided area and the like.

In the output video control unit 54 described above, the control unit 5
Although the following processing is performed under the intervention of 8, the processing example is merely an example and is not limited to the presented example.

When a standard television signal or the like is displayed, the one-screen display is the same as before. When a multi-channel multiplexed program capable of partially enlarged display is selected, a single screen image as shown in FIG. 2 is displayed as usual. Although the coordinate reference point p and the dividing boundary line (shown by a chain line) passing therethrough are not displayed on this screen, it is also possible to display them by combining them. If the division boundary line is reflected, the designated position of the divided image becomes clear.

The area to be magnified is selected using the cursor K. When the position is clicked when the cursor K is in the third divided area as shown in FIG. 2, the coordinate position (pointing address position) is changed to the coordinate reference point p.
When the position of the search result cursor K is determined, the channel selection signal is supplied to the output video control unit 54, and the video signal of the corresponding channel is selected. In the example of FIG. 2, the video signal (divided video material) of the third channel (CH3) is selected and supplied to the monitor 60. As a result, an image as shown in FIG. 3 in which the third divided area is enlarged and displayed is displayed on the monitor screen. After that, the third
The channel image is continuously displayed, but it is also possible to return to the original image (FIG. 2).

Since the video signal transmitted by the third channel is originally composed of the video signal which constitutes one screen, the image quality does not deteriorate even if the image is enlarged and displayed. In this way, the cursor K can be used to magnify and display any divided video. It is also possible to select the divided video by directly specifying the channel. Picture-in-picture (pinP) processing in which the original screen is fitted in a part of the enlarged and displayed screen as shown in FIG. 6 is also possible.

In the example shown in FIG. 2, the screen area is divided into n pieces in advance, and the divided areas are designated for enlarged display, so that the divided areas are fixed. However, in actuality, it is convenient if a part of the focused image is always tracked, and even if it is displayed at any position on the screen, that part can be enlarged and displayed in the size of one screen by designating it. It is unclear at which position on the screen this attention video is located, and the position is always moving.

Therefore, main subjects such as characters are determined in advance, and a pointing address indicating a position on the screen is given to them. For example, in the case of an image as shown in FIG. 7, parent and child X1, X2, mountain range X3 and UFOX4 are defined as main subjects, and the current position on the screen is given to these as a pointing address, and this is added information. And This pointing address usually changes moment by moment. Further, the identifier of the subject (keyword such as parent and child, UFO) is added to the additional information together with the pointing address.

At the same time, when the vicinity of the subject is selected, image enlargement processing such as interpolation is performed in order to enlarge and display it in the size of one screen, but the subject shown in FIG. 7 is sufficient. Enlarged display with high resolution is impossible.
Therefore, the video within a predetermined area (for example, 1/4 screen) including the subject is transmitted to the predesignated subjects X1 to X4 as image interpolation information by using multiple channels. Alternatively, it is transmitted as additional information.

In the former example, the image interpolation information (channel 1) of the subject X1 is given to the terminal 24a shown in FIG.
At the same time, a dedicated audio signal can be given to the terminal 26a. Similarly, the image interpolation information (channel 2) of the subject X2 is given to the terminal 24b, and the subject X2 is given to the terminal 24c.
3 image interpolation information (channel 3) is given, and the terminal 24
Image interpolation information (channel 4) of the subject X4 is given to d. These pieces of image interpolation information are digitized as described above, then multiplexed and transmitted together with other main information.

Then, as shown in FIG. 7, the user moves the cursor K
When is moved to specify the vicinity of UFOX4, the coordinate position is searched by the control unit 58 for the corresponding pointing address, and when a matching or approximate address is searched, the channel for the subject X4 is automatically selected. . As a result, an enlarged image subjected to the interpolation processing as shown in FIG. 8 is displayed.

Instead of designating the pointing address for the subject with the cursor K, an identifier (for example, UFO) for the subject can be selected. In that case, the pointing address to which the designated identifier belongs is analyzed and the subject image is displayed. The image interpolation information signal corresponding to the signal is selected and the interpolation process for enlarged display is performed.

The selected subject X4 is shown in FIG. 9 at the next moment.
May have moved to a position like. Even in that case, an image centered on the subject X4 as shown in FIG. 10 is obtained on the enlarged screen. Since the subject X4 is known in advance as described above, automatic tracking is possible by using the identifier, and the image interpolation information for the pointing address at the position of FIG. 9 is always supplied to the output video control unit 54. This is because it is possible to generate an enlarged image as shown in FIG. 10 from this image interpolation information and the subject X4 of the original image shown in FIG.

Therefore, in this case, even if the specified specific subject is a moving image, it can be enlarged and displayed while automatically tracking the subject. Since the image interpolation information is used, the resolution does not deteriorate so much. It is also possible to return from the enlarged display mode to the normal display mode (the original screen in FIG. 7).

[0051]

INDUSTRIAL APPLICABILITY As described above, the ISDB according to the present invention
The transmitting device and the receiving device transmit a plurality of image materials that can be enlarged and displayed together with additional information as one aspect of the ISDB broadcast signal, and the receiving side designates a specific region or a specific subject, thereby The image can be enlarged and displayed.

According to this, the image projected in the specific area or the image of the area including the specific subject is
It has the feature that it can be enlarged and displayed in the size of the screen. In this case, since the image is enlarged and displayed using the enlarged image information or the image interpolation information transmitted using the dedicated channel, the image quality does not deteriorate even when the image is enlarged and displayed.
You can enjoy magnified images with good resolution.

Since the user's intentional broadcast can be selected in this way, a kind of user participation type entertainment broadcast can be realized, and the television broadcast can be enjoyed from various aspects. Therefore, the present invention is extremely suitable when applied to an ISDB system for digital broadcasting.

[Brief description of the drawings]

FIG. 1 is a system diagram of a main part showing an embodiment of an ISDB transmission device according to the present invention.

FIG. 2 is a diagram showing a relationship between an original image and a designated area.

FIG. 3 is a diagram showing an enlarged display example of a designated area.

FIG. 4 is a system diagram of a main part showing an embodiment of an ISDB receiver according to the present invention.

FIG. 5 is a configuration diagram showing a specific example of a commander.

FIG. 6 is a diagram showing an example of picture-in-picture.

FIG. 7 is a diagram (part 1) showing a relationship between an original image and a designated subject when a pointing address is added.

FIG. 8 is a diagram illustrating an enlarged display example when a subject X4 is designated.

FIG. 9 is a diagram (part 2) showing the relationship between an original image and a designated subject when a pointing address is added.

FIG. 10 is a diagram showing an enlarged display example when a subject X4 at that time is designated.

[Explanation of symbols]

 10 ISDB transmission device 14, 22A to 22D encoding unit 16 time code generation unit 20 multiplexing unit 28A to 28D additional information generation unit 46 ISDB tuner 52, 56 decoding unit 54 output video control unit 60 monitor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiya Ishizaka 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (8)

[Claims] 1. An ISDB transmitter for transmitting various kinds of main information such as video, audio, data, etc. together with additional information such as control information, and then transmitting a packetized and multiplexed ISDB broadcast signal, When the main information is displayed on the screen as the main information, the image of one screen is divided into n and each image is enlarged and displayed in the size of one screen. In addition, the IS is characterized in that the pointing address information indicating which divided image on one screen is digitized as additional information and multiplexed.
DB transmitter. 2. The ISDB transmission device according to claim 1, wherein the pointing address information is coordinates indicating a screen division position. 3. An ISDB transmitter for transmitting various kinds of main information such as video, audio, data, etc. together with additional information such as control information, and then transmitting a packetized and multiplexed ISDB broadcast signal, When the above main information is displayed on the screen, a pointing address on the screen for one or more main subjects in the projected image is attached, and the subject with the pointing address is enlarged and displayed on one screen. An ISDB transmitting apparatus, wherein the image interpolation information is transmitted using channels of the number of pointing addresses, and the pointing address information is transmitted as additional information. 4. The ISDB transmitting apparatus according to claim 3, wherein the image interpolation information is transmitted as additional information together with the pointing address information. 5. An ISDB receiver for receiving ISDB broadcast signals, which are obtained by digitizing various main information such as video, audio and data together with additional information such as control information, and then packetizing and multiplexing. Includes an ISDB tuner, a decoding unit for the main information, the image information for enlarged display, and the additional information, a screen synthesis unit that synthesizes / separates the main information and supplies the additional information, and a control unit thereof. The additional information is supplied to the control unit, and when the pointing address is designated by the user, the divided image or the subject designated by the pointing address is enlarged and displayed. ISDB receiver. 6. The magnified display image information of a channel including the pointing address is selected and magnified and displayed when the pointing address is designated. ISDB
Receiver. 7. The pointing address is designated by a cursor displayed on the screen,
The ISDB receiving apparatus according to claim 5, wherein the screen division position or the subject position is specified based on the coordinates of the cursor position. 8. When the image specified by using the image interpolation information is enlarged and displayed, the image interpolation information related to the pointing address specified by the cursor is selected, and the image on the screen specified by the cursor is selected. 6. The ISD according to claim 5, wherein an image for enlarged display is generated by adding the image interpolation information to the subject information.
B receiver.