JP3780079B2 - Digital signal transmitter and receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital signal transmitting apparatus and a receiving apparatus for multiplexing and transmitting and receiving a plurality of service information SI data including information such as programs to be transmitted together with video information and audio information, and in particular, the service information relating to compression related information. The present invention relates to a digital signal transmitting apparatus and receiving apparatus suitable for restoring SI data and displaying program information, recording a program, or displaying a program guide.
[0002]
[Prior art]
In a conventional digital broadcasting system, data relating to a program is generally multiplexed with broadcast information as service data SI (Service Information) data (hereinafter simply referred to as SI data) in accordance with MPEG2 (ISO / IEC13818-1) regulations. ing. In addition, all the images used for broadcasting are MP @ ML in accordance with the provisions of MPEG2 (ISO / IEC13818-2), but future broadcasting of MP @ HL is also possible (Nikkei Electronics 1996.9.2 pp.149-164). ). Although there is information such as the time zone of the program in these program data, there is no description of compression related information indicating the compression performance of each video signal / audio signal, and in order to obtain the compression related information, the packet separation is performed. It is necessary to analyze the header part relating to the desired video signal / audio signal separated by the means to obtain the compression related information.
[0003]
FIG. 2 is a block diagram of a digital signal receiving apparatus in a conventional digital signal transmitting / receiving apparatus. In FIG. 2, a digital broadcast receiving apparatus 100 includes an input terminal 101 for a signal obtained by multiplexing and modulating a plurality of video signals, audio signals, and SI data, a receiving unit 11, a packet separating unit 12, and a video signal / audio. A decoding unit 13 that decodes a signal; a system control unit 14 that analyzes received information to control each unit; a compression-related information analysis / extraction unit 141 included in the system control unit 14; a display unit 15; And an output terminal 102 for outputting.
[0004]
The receiving unit 11 corrects errors that occur during demodulation and transmission. The packet separator 12 selectively extracts a desired video signal / audio signal / SI data signal from the multiplexed signal. The decoding unit 13 decodes the compression-coded signal. The system control unit 14 analyzes the SI data separated by the packet separation unit 12 and controls display of the SI data. In particular, the compression-related information analysis / extraction unit 141 analyzes and extracts compression-related information from a desired video signal / audio signal separated by the packet separation unit 12 and decoded by the decoding unit 13. The display unit 15 displays the desired video signal decoded by the decoding unit 13 and the compression related information on the screen. FIG. 2 shows that the compression-related information can be acquired and displayed on the screen only after the output video signal / audio signal from the decoding unit 13 is obtained after the desired video / audio signal is received.
[0005]
[Problems to be solved by the invention]
When video signals / audio signals having a plurality of types of compression-related information are transmitted and received using the conventional digital signal transmitting / receiving apparatus described here, (1) compression-related video signals of desired channels Considering that the digital signal receiving device is provided with a function of displaying information, (2) detecting whether or not the video signal can be recorded, or (3) identifying and displaying by compression related information when displaying a program guide. As described above, in the conventional digital signal transmission / reception apparatus, the header related to the video signal must be analyzed to obtain the compression related information. Therefore, the compression of the desired video signal is received before the desired video signal is received. There is a problem that information cannot be acquired. Therefore, conventionally, the user cannot know the compression related information of the program unless the program is started.
[0006]
An object of the present invention is to display digital signal transmission for realizing display of compression-related information of a video signal / audio signal of a desired channel, detection of video recording availability, and program identification display in a program guide according to compression-related information. It is to provide an apparatus and a receiving apparatus.
[0007]
[Means for Solving the Problems]
The digital signal receiving apparatus according to the present invention comprises a receiving means for receiving a transmission signal in which a digitized and compressed video signal / audio signal is multiplexed and modulated in a packet format together with service information SI data indicating information such as a program; Packet separation means for separating and extracting the video signal / audio signal and the SI data multiplexed by packetization, decoding means for decoding and outputting the video signal / audio signal separated from the packet separation means, and the packet separation A digital signal receiving apparatus comprising system control means for analyzing the SI information separated from the means and controlling display of the SI information,
The system control means includes compression-related information analysis means for analyzing compression-related information of a video signal / audio signal included in the SI information from the packet separation means, and the compression-related information analysis means includes the compression-related information analysis means. Is to analyze.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
FIG. 3 is a block diagram of a digital signal transmitting apparatus according to an embodiment of the present invention. In FIG. 3, a digital signal transmission apparatus 400 includes an input terminal 401 for inputting a video signal / audio signal, an SI data supply unit 41, a compression related information supply unit 411 included in the SI data supply unit 41, and a data multiplexing unit. 42, a sending unit 43, and an output terminal 402 that outputs a signal sent by the sending means.
[0010]
Next, the operation of the digital signal transmitting apparatus 400 according to the present embodiment will be described. The compression related information supply unit 411 supplies the compression related information related to the video signal / audio signal, and the SI data supply unit 41 supplies information such as a program and SI including the compression related information to the data multiplexing unit 42. The data multiplexer 42 multiplexes the compressed video signal / audio information and the SI data, and outputs the multiplexed data to the transmitter 43. The sending unit 43 modulates and sends out the output signal of the data multiplexing unit. In particular, by providing a compression-related information supply unit 411 that supplies compression-related information for video and audio signals, the compression-related information can be supplied as SI data and transmitted as broadcast data. On the side, before receiving a desired video, it is possible to acquire compression-related information regarding the desired video signal.
[0011]
FIG. 1 is a block diagram of a digital signal receiving apparatus according to a first embodiment of the present invention. This embodiment is characterized in that the compression-related information extracted by the compression-related information analysis / extraction unit 142 is displayed on the screen. In the conventional digital signal receiving apparatus shown in FIG. It is indicated by a symbol.
[0012]
In FIG. 1, a compression-related information analysis / extraction unit 142 analyzes and extracts compression-related information from the SI data separated by the packet separation unit 12, and is otherwise the same as the conventional block diagram of FIG.
[0013]
Next, the operation of the digital signal receiving apparatus 100 according to the present embodiment will be described. In digital broadcasting, when program A using video A and program B using video B are scheduled to be broadcast in the future, it is described that video A is MP @ ML and video B is MP @ HL. A description will be given of an operation example in which a bitstream including received SI data is received, profile and level information is analyzed and extracted from the SI data separated by the packet separation unit 12, and the information is displayed on the screen.
[0014]
A digital signal in which a plurality of information is multiplexed is input to the input terminal 101, and the receiving unit 11 demodulates the digital signal. The packet separator 12 separates and extracts desired SI data. The compression-related information analysis / extraction unit 142 analyzes and extracts profile and level information for a desired video from the separated and extracted SI data, and video A is MP @ ML and video B is MP @ HL. get information. The display unit 15 displays the output video of the decoding unit 13 and the profile and level information on the screen. In this way, when the SI describing the profile and level information regarding the video signals of the programs A and B is acquired, the profile and level information for each program is displayed. FIG. 4 is an example in which profiles and level information for program A and program B are displayed. On the display device 500, a program name column 501 and a profile and level information column 502 are displayed.
[0015]
As shown in FIG. 4, since profile and level information can be acquired from SI data, it is possible to know profile and level information about a video of a program to be broadcast in the future before receiving a desired video signal. it can.
[0016]
FIG. 5 is a block diagram of a digital signal receiving apparatus according to the second embodiment of the present invention. This embodiment is characterized in that it uses the compression-related information extracted by the compression-related information analysis / extraction unit 14 to detect whether or not a desired video can be recorded in advance, as shown in FIG. In the digital broadcast receiving apparatus, the same means are indicated by the same reference numerals.
[0017]
In FIG. 5, a user input terminal 103 is an input terminal that receives an input from a user. The recording device setting unit 143 sets and stores the device specifications relating to recording of the digital video recording device built in or externally connected as recording device setting information, and the recording device control unit 144 stores the compression related information and the recording device setting information. From this, it is detected whether or not a desired video can be recorded, and the recording apparatus is controlled based on the recording availability result. The digital recording apparatus may not be able to record depending on the profile and level because the transmission rate at which recording can be performed may vary depending on the device.
[0018]
Therefore, the recording device control unit 144 detects whether recording is possible by the connected recording device, and notifies the user. Therefore, it is possible to determine whether or not recording reservation is made. The display unit 21 displays the video signal decoded by the decoding unit 13 and the recording availability detection result detected by the recording device control unit 144 on the screen. The control signal output terminal 104 is a terminal that outputs a control signal of the recording apparatus. Others are the same as the embodiment of FIG.
[0019]
Next, the operation of the digital signal receiving apparatus 100 according to the present embodiment will be described. In digital broadcasting, when program A using video A and program B using video B are scheduled to be broadcast in the future, it is described that video A is MP @ ML and video B is MP @ HL. Example of receiving a bit stream including SI as additional data, analyzing and extracting profile and level information based on the SI data separated by the packet separation unit 12, controlling the recording device, and displaying a recordable / unusable detection result Will be explained.
[0020]
Next, the operation of differences from the above-described embodiment shown in FIG. 1 will be described. First, consider a case where a digital video recording apparatus that supports only MP @ ML is connected to the outside. It is assumed that the user performs a setting operation in advance through the user input terminal 103 so that the recording apparatus is an MP @ ML compatible recording apparatus. The recording device setting unit 143 sets and stores “the recording device is an MP @ ML compatible recording device” based on the user setting operation. Recording device controller 144, a recording device has been stored by the setting unit 143 'wherein the recording device is the MP @ ML corresponding recording device "will leave the recording device setting information and the video A, the compression-related information related to the video B Originally, it detects that video A can be recorded on the recording device, but video B cannot be recorded on the recording device.
[0021]
Further, when the recording apparatus control unit 144 receives a setting operation for program recording reservation of the program A from the user through the user input terminal 103, the recording apparatus control unit 144 records the program A at the reserved time based on the recording availability detection result. Thus, the display unit 21 displays that the recording apparatus can be controlled and recording can be performed. When a setting operation for program recording reservation of program B is received from the user, the display unit 21 displays that the program B cannot be recorded based on the recording availability detection result.
[0022]
In this way, when SI data describing profiles and level information related to the video signals of programs A and B is acquired, the recording device is controlled for each video signal.
[0023]
Next, consider a case where a digital video recording apparatus corresponding to MP @ ML and MP @ HL is connected to the outside.
[0024]
It is assumed that the user has performed a setting operation in advance through the user input terminal 103 so that the recording device is a recording device that supports MP @ ML and MP @ HL. Based on the user setting operation, the recording device setting unit 143 sets and stores “the recording device is a recording device compatible with MP @ ML and MP @ HL”. The recording device control unit 144 stores the compression related to the recording device setting information and the video A and the video B that are stored in the recording device setting unit 143 and that “the recording device is a recording device compatible with MP @ ML and MP @ HL”. Based on the related information, it is detected that both video A and video B can be recorded on the recording device.
[0025]
Furthermore, when the recording device control unit 144 receives a setting operation for program recording reservation of the video A from the user through the user input terminal 103, the recording apparatus control unit 144 records the program A at the reserved time based on the recording availability detection result. Thus, the recording device is controlled, and the display unit 21 displays that recording is possible. In the case of program recording reservation for program B as well, the recording apparatus is controlled in the same manner to display that recording is possible.
[0026]
In this way, when the SI describing the profile and level information regarding the video signals of the programs A and B is acquired, the recording device is controlled for each video.
[0027]
As described above, since the profile and level information can be acquired from the SI data, it is possible to know the recording availability information of the video of the program that will be broadcast in the future before receiving the video signal for which the recording availability is desired. Thus, it is possible to control the recording apparatus corresponding to the video in the program recording reservation.
[0028]
Further, in the digital signal receiving apparatus shown in the block diagram of FIG. 5, the operation of the digital signal receiving apparatus when the video signal or audio signal bit rate is used as compression-related information to detect whether recording is possible is different from the above. explain.
[0029]
In this embodiment, the compression-related information analysis / extraction unit 142 analyzes and extracts the bit rate of the video signal and the audio signal from the SI data as compression-related information. Further, based on the user setting operation, the recording device setting unit 143 records that the built-in or externally connected digital video recording device is a “recording device capable of recording only video having a certain bit rate or less”. Set device setting information. Based on the compression related information and the recording device setting information, the recording device control unit 144 controls the recording device.
[0030]
Further, in the digital broadcast receiving apparatus shown in the block diagram of FIG. 5, the total bit rate of the video signal / audio signal, the number of frames / second of the video signal, the line frequency of the video signal, or the resolution of the video signal is compressed. The digital signal receiving device used for detecting whether recording is possible is based on the compression related information and recording device setting information related to the compression related information of the built-in or externally connected digital video recording device. The control unit 144 controls the recording device to detect whether recording is possible.
[0031]
FIG. 6 is a block diagram of a digital signal receiving apparatus according to a third embodiment of the present invention. This embodiment is characterized in that compression-related information is extracted by the compression-related information analysis / extraction unit 14, and the program name column in the program table is identified and displayed by color-coding according to the compression-related information for each program. The same means in the digital signal receiving apparatus shown in FIG.
[0032]
In FIG. 6, the program guide display unit 31 displays the video signal decoded by the decoding unit 13 and the program guide capable of color coding on the screen. Others are the same as the embodiment shown in FIG.
[0033]
Next, the operation of the digital signal receiving apparatus 100 according to the present embodiment will be described. In digital broadcasting, when program A using video A and program B using video B are scheduled to be broadcast in the future, it is described that video A is MP @ ML and video B is MP @ HL. A description will be given of an operation example in which a bit stream including SI as additional data is received, profile and level information are analyzed and extracted by the additional data from the packet separation unit 12, and a recording availability detection result is displayed.
[0034]
Next, the operation of differences from the embodiment shown in FIG. 1 will be described. The program guide display unit 31 arranges the program name column for program A in the program guide in a predetermined color for MP @ ML specified in advance based on the compression related information, and the program name for program B The column is colored and displayed in a predetermined color for MP @ HL specified in advance. In this way, when the SI describing the profile and level information regarding the MP @ ML and MP @ HL video signals is obtained, the program name column for each video in the program table is colored in a predetermined color and displayed on the screen. To do.
[0035]
FIG. 7 shows a program guide display example. A channel number column 601 and a program name column 602 are displayed on the display device 600. The program name column 602a is a program name column for the program A, and the program name column 602b is a program name column for the program B. Yes. As shown in FIG. 7, color-coded display for each program according to profile and level information makes it possible to visually identify the profile and level information in the program table.
[0036]
In this way, since profile and level information can be obtained from SI data, the user can obtain profile and level information regarding the video of a program to be broadcast in the future before receiving a video signal for the program to be displayed on the program guide. Visually understandable.
[0037]
Further, in the digital broadcast receiver shown in the block diagram of FIG. 6, the bit rate of the video signal or audio signal, the total bit rate of the video signal / audio signal, the number of frames of the video signal per second, the line frequency of the video signal, Alternatively, the digital signal receiving apparatus in the case where the resolution of the video signal is used as the compression related information also performs the same processing as in the above embodiment, and color-codes the program name column in the program table according to the compression related information for each program. To identify.
[0038]
FIG. 8 is a block diagram of a digital signal receiving apparatus according to a fourth embodiment of the present invention. This embodiment is characterized in that compression-related information is extracted by the compression-related information analysis / extraction unit 14, and the program name column in the program table is identified and displayed using marks according to the compression-related information for each program. The same means in the digital signal receiving apparatus shown in FIG.
[0039]
In FIG. 8, the program guide display unit 32 displays the video signal decoded by the decoding unit 13 and a program guide that can be displayed by the mark on the screen. Others are the same as the embodiment shown in FIG.
[0040]
Next, the operation of the digital signal receiving apparatus 100 according to the present embodiment will be described. In digital broadcasting, when program A using video A and program B using video B are scheduled to be broadcast in the future, it is described that video A is MP @ ML and video B is MP @ HL. A description will be given of an operation example in which a bit stream including SI as additional data is received, profile and level information are analyzed and extracted by the additional data from the packet separation unit 12, and a recording availability detection result is displayed.
[0041]
Next, the operation of differences from the embodiment shown in FIG. 1 will be described. Based on the compression-related information, the program guide display unit 32 displays a mark for MP @ ML specified in advance in the program name column for program A in the program guide, and in the program name column for program B. The mark for MP @ HL specified in advance is displayed. In this way, when the SI describing the profile and level information regarding the MP @ ML and MP @ HL video signals is acquired, a predetermined mark is displayed on the screen in the program name column for each video in the program guide.
[0042]
FIG. 9 shows an example of a program guide display. A channel number column 701 and a program name column 702 are displayed on the display device 700. The program name column 702a is a program name column for the program A, and the program name column 702b is a program name column for the program B. Yes. In FIG. 9, mark 801a is a mark displayed corresponding to program A, and mark 801b is a mark displayed corresponding to program B. As shown in FIG. 9, by displaying the mark for each program according to the profile and level information, the profile and level information can be visually identified in the program table.
[0043]
In this way, since profile and level information can be obtained from SI data, the user can obtain profile and level information regarding the video of a program to be broadcast in the future before receiving a video signal for the program to be displayed on the program guide. Visually understandable.
[0044]
Furthermore, in the digital signal receiving apparatus shown in the block diagram of FIG. 8, the bit rate of the video signal or audio signal, the total bit rate of the video signal / audio signal, the number of frames of the video signal per second, the line frequency of the video signal, Alternatively, the digital broadcast receiving apparatus in the case where the resolution of the video signal is used as the compression related information also performs the same processing as in the above embodiment, and uses the mark according to the compression related information in the program name column in the program table for each program. To identify.
[0045]
【The invention's effect】
According to the present invention, information such as profile and level information regarding a desired video signal to be transmitted, or information such as a bit rate can be acquired before the desired video signal is received. It is possible to perform detection, color coding or marking according to a prior program guide profile and level information, and to provide a user-friendly digital signal receiving apparatus.
[Brief description of the drawings]
FIG. 1 is a block diagram of a digital signal receiving apparatus according to a first embodiment of the present invention.
FIG. 2 is a block diagram of a conventional digital receiver.
FIG. 3 is a block diagram of a digital signal transmission apparatus according to an embodiment of the present invention.
FIG. 4 is a diagram showing a profile and level information display example for a program.
FIG. 5 is a block diagram of a digital signal receiving apparatus according to a second embodiment of the present invention.
FIG. 6 is a block diagram of a digital broadcast receiving apparatus according to a third embodiment of the present invention.
FIG. 7 is a diagram showing a program table display example in which a program name column is color-coded and identified by profile and level information.
FIG. 8 is a block diagram of a digital broadcast receiving apparatus according to a fourth embodiment of the present invention.
FIG. 9 is a diagram showing a program table display example in which a program name column is marked and identified by profile and level information.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Reception part 12 Packet separation part 13 Decoding part 14 System control part 15 Display part 41 SI data supply part 42 Data multiplexing part 43 Sending part 100 Digital signal receiver 101 Input terminal 102 Output terminal 103 Input terminal 104 Output terminal 142 Compression related information Analysis / extraction unit 143 Recording device setting unit 144 Recording device control unit 400 Digital signal transmission device 401 Input terminal 402 Output terminal 411 Compression related information supply unit

Claims (19)

Input means for inputting a digitized and compressed video signal or audio signal, and SI for supplying service information SI data (excluding PSI information) indicating information related to the digitized and compressed video signal or audio signal Data supply means; data multiplexing means for multiplexing the digitized and compressed video signal or audio signal from the input means and the service information SI data supplied from the SI data supply means in a packet format; and In a digital signal transmitting apparatus comprising a sending means for modulating and sending out the output signal of the data multiplexing means,
The SI data supply means outputs a video signal or audio signal of a program to be transmitted in the future corresponding to compression-related information of the digitized and compressed video signal or audio signal as a part of the service information SI data. A digital signal transmitting apparatus characterized in that it is supplied to the data multiplexing means before.   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is a profile defined by MPEG2 (ISO / IEC13818-2).   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is at a level defined by MPEG2 (ISO / IEC13818-2).   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is a bit rate of the video signal or audio signal.   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is a bit rate obtained by combining bit rates of the video signal and the audio signal.   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is the number of frames / second of the video signal.   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is a line frequency of the video signal.   2. The digital signal transmitting apparatus according to claim 1, wherein the compression-related information is a resolution of the video signal. Receiving means for receiving a transmission signal multiplexed and modulated in a packet format together with a digitized and compressed video signal or audio signal and service information SI data (excluding PSI information) indicating information related to the video signal or audio signal Packet separation means for separating and extracting the service information SI data and the video signal or audio signal multiplexed in packets, and decoding for outputting the video signal or audio signal separated from the packet separation means A digital signal receiving apparatus comprising: means; and system control means for controlling the display of the service information SI data by analyzing the service information SI data separated from the packet separation means,
The system control means includes compression-related information analysis means for analyzing compression-related information of a video signal or an audio signal included in the service information SI data from the packet separation means, and is transmitted in the future by the compression-related information analysis means. A digital signal receiving apparatus which analyzes the compression related information corresponding to the video signal or audio signal received before receiving the video signal or audio signal of the program to be played. The digital signal receiver according to claim 9, wherein
The digital signal receiving apparatus according to claim 1, wherein the compression-related information is a profile defined by MPEG2 (ISO / IEC13818-2). The digital signal receiver according to claim 9, wherein
The digital signal receiving apparatus according to claim 1, wherein the compression-related information is at a level defined by MPEG2 (ISO / IEC13818-2). The digital signal receiver according to claim 9, wherein
The digital signal receiving apparatus, wherein the compression related information is a bit rate of the video signal or the audio signal. The digital signal receiver according to claim 9, wherein
The digital broadcast receiver according to claim 1, wherein the compression-related information is a bit rate obtained by combining bit rates of the video signal and the audio signal. The digital signal receiver according to claim 9, wherein
The digital signal receiving apparatus, wherein the compression-related information is the number of frames / second of the video signal. The digital signal receiver according to claim 9, wherein
The digital signal receiving apparatus, wherein the compression related information is a line frequency of the video signal.   10. The digital signal receiving apparatus according to claim 9, wherein the compression related information is a resolution of the video signal. The digital signal receiving apparatus according to any one of claims 9 to 16,
Program table display means for extracting information related to a desired program from the service information SI data and displaying a program table, and the program table time table includes each program in the program table according to the type of the compression related information. A digital signal receiving apparatus comprising program identification display means for identifying and displaying a name column for each program. The digital signal receiver according to claim 17, wherein
The digital signal receiving apparatus according to claim 1, wherein the program identification display performs identification display by color-coding each program name column in the program table according to the type of the compression related information. The digital signal receiver according to claim 17, wherein
The digital signal receiving apparatus according to claim 1, wherein the program identification display identifies and displays each program name field in the program table for each program according to the type of the compression-related information.

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