JP2001094953A - Method for outputting transport stream and receiver or integrated circuit using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a TS output, even when TS-ID is not designated in a satellite digital broadcast receiver. SOLUTION: This satellite digital broadcast receiver can obtain a TS output, in whatever case by designating a TS-ID with the smallest number or a TS-ID corresponding to a transmission mode in the highest layer, even when no TS-ID is designated in an initial receiver start state, a receiver reset state or a satellite switching in the satellite digital broadcast receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a BS digital broadcast in which transmission multiplex control information indicating the configuration and modulation scheme of a plurality of transport streams (hereinafter referred to as TS) having a frame configuration is shown. And a transport stream output method for outputting a TS even when a transport stream ID (hereinafter, referred to as TS_ID) is not specified, and a receiver or an integrated circuit using the same.

[0002] Here, TS_ID is information for identifying a TS in transmission multiplex control information, and TS_I
By designating and selecting D, a desired TS (ie, program) can be output. Regarding the transmission multiplex control information, there is a description in the transmission / operation conditions “standards” of BS digital broadcasting, and the present invention mainly includes:
This is performed based on the above-mentioned standard or the one based on the above-mentioned standard.

[0003]

2. Description of the Related Art While conventional CS digital broadcasting is a single TS by a single operator and the modulation method is a four-phase modulation method (hereinafter referred to as QPSK), a satellite digital signal using a BS is used. In broadcasting, transmission multiplexing control using a plurality of TSs having a frame configuration in which video, audio, and data are compressed and multiplexed, and a two-phase modulation scheme (hereinafter, referred to as BPSK) indicating a configuration and a modulation system of the plurality of TSs having a frame configuration. The information necessary for demodulation is notified to the receiver by multiplexing the information with the broadcast wave. In addition, in BS satellite digital broadcasting, TS except for transmission multiplex control information can be transmitted by three types of eight-phase modulation (hereinafter referred to as 8PSK), QPSK, and BPSK.

FIG. 7 shows an example of a general satellite digital broadcast receiver. Numeral 63 denotes a satellite digital broadcast receiver, which is a tuner 21, digital demodulation 22, transmission path decoding 23, transmission multiplex control information decoding 24, control microcomputer 125, TS packet separation / selection 26, digital compression expansion (MPEG).
Decoder 27, video processing 28, audio processing 29, high-frequency input terminal 100, video output terminal 111, and audio output terminal 112.

[0005] A satellite digital broadcast receiver 63 receives a 1 GHz band digital modulated signal from an outdoor unit (not shown) from a high frequency input terminal 100, selects a channel by a tuner 21, performs direct detection, and inputs it to a digital demodulator 22. Is done. Digital demodulation 22 is BPSK, QPSK, 8P
Carrier recovery and clock recovery of SK are performed. Transmission line decoding 2
Numeral 3 is composed of error correction (FEC), inverse power spreading, deinterleaving, demultiplexing of the TS, etc., decodes the TS from the digital modulation signal, and selectively outputs a desired TS based on transmission multiplex control information. The transmission multiplex control information decoder 24 decodes transmission multiplex control information necessary for transmission path decoding. TS is T
Input to the S packet separation selection 26. In the TS packet separation selection 26, program information or compressed data of a desired program is selected, video and audio information are digitally decompressed by the MPEG decoder 27, and the video output 111 and the audio output 112 are passed through the video processing 28 and the audio processing 29. To output. In the BS digital broadcasting, a plurality of TSs, that is, a plurality of programs exist in a received signal whose channel is selected by the tuner 21, and selecting a desired program outputs one TS. The selection of the TS is performed by the control microcomputer 125.

FIG. 8 shows T in the general control microcomputer 125.
An example of the S output control will be described. In the control microcomputer 125, an interrupt process due to a channel change occurs. At this time, the process proceeds to conditional branch 1 for determining whether the TS_ID has been designated. If the TS_ID has been designated, the corresponding TS
Is executed so as to select and output.

[0007]

However, in the conventional example described above, when the receiver is started up initially, when the receiver is reset, or when the satellite to be received is switched, the TS_ID is not specified. There is a problem that cannot output.

An object of the present invention is to solve the above-mentioned drawbacks,
An object of the present invention is to provide a transport stream output method capable of outputting a TS even when an ID is not specified, and a receiver or an integrated circuit using the same.

[0009]

According to the transport output method of the present invention, in order to solve the above-mentioned drawbacks, TS_ID information or transmission mode information in transmission multiplex control information is used, and TS is transmitted even when TS_ID is not specified. Output.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of a digital broadcast receiver according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a satellite digital broadcast receiver according to the present invention. In the figure, the same numbers as those in the other figures indicate the same functional blocks. Reference numeral 63 denotes a satellite digital broadcast receiver, which is a tuner 21 and a digital demodulation 2.
2, transmission path decoding 23, transmission multiplex control information decoding 24, control microcomputer 225, TS packet separation / selection 26, digital compression expansion (MPEG decoder) 27, video processing 2
8, audio processing 29, high-frequency input terminal 100, video output terminal 111, and audio output terminal 112.

In the digital satellite broadcasting receiver 63, a digital modulation signal of 1 GHz band is inputted from an outdoor unit (not shown) from the high frequency input terminal 100,
At 1, a desired channel is selected, subjected to direct detection, and input to the digital demodulation 22. The digital demodulation 22 performs carrier reproduction and clock reproduction of BPSK, QPSK, and TC8PSK. The transmission path decoding 23 comprises error correction (FEC), inverse power spreading, deinterleaving, demultiplexing of TS, etc., decodes a TS from a digital modulation signal, and selectively outputs a desired TS based on transmission multiplex control information. I do. The transmission multiplex control information decoder 24 decodes transmission multiplex control information necessary for transmission path decoding. The TS is input to the TS packet separation selection 26. In the TS packet separation selection 26, program information and compressed data of a desired program are selected, and video and audio information are
Digitally decompressed by the EG decoder 27, the video output 111 and the audio output 112 via the video processing 28 and the audio processing 29.
To output.

FIG. 2 shows an embodiment of the TS output control in the control microcomputer 225 according to the present invention. Control microcomputer 2 25
First, when the receiver is started, an interrupt process such as a channel change occurs on the control side. At this time, the process proceeds to conditional branch 1 as to whether or not TS_ID is specified. If specified, an instruction 2 for selecting and outputting the corresponding TS is executed. If there is no designation, the procedure goes to the conditional branch 3 as to whether or not an 8-phase phase modulated signal (hereinafter, 8PSK) is present in the received signal. If the transmission mode of 8PSK exists, the process goes to the conditional branch 4 as to whether two or more TS_IDs of 8PSK exist or not, and decodes the transmission multiplex control information 24.
More TS_ID information is obtained. If there are two or more transmission modes of 8PSK, the TS_
An instruction 5 for selecting the minimum TS_ID from the IDs and outputting the TS is executed. When there is only one transmission mode of 8PSK, a corresponding TS_ID is selected, and a command 6 for outputting a TS is executed. If there is no 8PSK transmission mode in conditional branch 3 above, QPSK
Go to the conditional branch 7 to determine whether the transmission mode exists or not, and acquire the transmission mode information from the transmission multiplex control information decoding unit 24. If the transmission mode of QPSK exists, Q
The process goes to the conditional branch 8 as to whether or not two or more PSK TS_IDs exist.
Obtain S_ID information. QPSK transmission mode is 2
If there is more than one, the process goes to the conditional branch 9 as to whether or not two or more TS_IDs with the highest coding rate in QPSK exist. If there are, the minimum TS_ID among the corresponding TS_IDs is determined. An instruction 10 for selecting and outputting a TS is executed. In the above conditional branch 9, Q
TS_I in the PSK transmission mode and the highest coding rate
If two or more Ds do not exist, the corresponding TS_I
An instruction 12 for selecting D and outputting TS is executed. If there is only one QPSK transmission mode in the conditional branch 8, the instruction 11 for selecting the corresponding TS_ID and outputting the TS is executed. QP in conditional branch 7
If there is no SK transmission mode, the minimum value of TS_I
Instruction 13 for selecting D and outputting TS is executed. According to the present invention, it is possible to obtain a TS output even when the TS_ID is not specified.

The above processing flow is performed by using the transmission multiplex control information decoded by the transmission multiplex control information decoding 24.
This is performed by the control microcomputer.

FIG. 3 is a block diagram showing an embodiment of a channel decoder integrated circuit applied to the satellite digital broadcasting receiver shown in FIG. Channel decoder integrated circuit 64
Has an AD converter 30, a digital demodulation 22, a transmission line decoding 23 having an error correction (FEC) decoder and deinterleaving, a transmission multiplexing control information decoding 24, and a separation / selection 26 of TS packet information. A channel selected signal is input from 101, a TS packet is output from an output pin 113, and transmission multiplex control information is output from a microcomputer interface pin 114 via the microcomputer interface 31. In addition, through the microcomputer interface 31, external control means performs TS output processing as shown in FIG. According to the present invention, the power consumption can be reduced by integrating the channel decoder into one chip.
In addition, the satellite digital broadcast receiver can be downsized. Then, a TS output can be obtained even when the TS_ID is not specified.

FIG. 4 is a block diagram showing an embodiment in which the satellite digital broadcast receiver shown in FIG. 1 is applied to a television system. In the figure, 65 is a television with a built-in satellite digital broadcast receiver, 51 is a display unit, and 52 is an audio playback unit.
According to the present invention, a television 6 with a built-in receiver for satellite digital broadcasting
No. 5 makes it possible to obtain a TS output even when the TS_ID is not specified.

FIG. 5 is a block diagram showing an embodiment in which the satellite digital broadcast receiver shown in FIG. 1 is applied to a video recording / reproducing apparatus. The video recording / reproducing machine 66 performs data processing 41,
Recorded data processing 42, recorded data reproduction processing 4
3, a recording unit 44. The video recording / playback unit 66 performs signal processing for recording the TS input to the data processing 41 via the recording data processing 42 via the recording unit 4.
4, and at the time of reproduction, is input to the data processing 41 via the reproduction processing 43 and is connected to the digital receiver. According to the present embodiment, a video recording / playback system using multiple TSs can be easily configured by connecting the video recording / playback device 66 to a single / multiple TS of the television 65 with a built-in satellite digital broadcast receiver. A TS output can be obtained even when TS_ID is not specified.

FIG. 6 is a block diagram showing an embodiment of a front end applied to the satellite digital broadcasting receiver shown in FIG. 67 is a front end. In this embodiment, the tuner 21 and the channel decoder 64 are built in the front end 67. As shown in FIG.
Perform S output processing. With this configuration, the size of the satellite digital broadcast receiver can be reduced, the television receiver can be easily incorporated, and a TS output can be obtained even when TS_ID is not specified.

[0019]

According to the present invention, when starting up the receiver, resetting the receiver, or switching the receiving satellite, the smallest number of the TS_ID is specified even if the TS_ID is not specified. Specified or TS_ corresponding to the highest layer transmission mode
By specifying the ID, there is an effect that a TS output can be obtained even when TS_ID is not specified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a digital broadcast receiver according to the present invention.

FIG. 2 is a chart showing one embodiment of a TS output method according to the present invention.

3 is a block diagram showing one embodiment of a channel decoder integrated circuit applied to the satellite digital broadcast receiver shown in FIG. 1;

FIG. 4 is a block diagram showing an embodiment in which the satellite digital broadcast receiver shown in FIG. 1 is applied to a television system.

FIG. 5 is a block diagram showing an embodiment in which the satellite digital broadcast receiver shown in FIG. 1 is applied to a video recording / playback system.

FIG. 6 is a block diagram showing one embodiment of a front end applied to the satellite digital broadcast receiver shown in FIG. 1;

FIG. 7 is a block diagram showing a configuration of a conventional digital broadcast receiver.

FIG. 8 is a chart showing a conventional TS output method.

[Explanation of symbols]

1 ... Conditional branch: TS_ID is specified or not 2 ... Processing instruction: TS corresponding to specified TS_ID is output 3 ... Conditional branch: T whose transmission mode corresponds to 8PSK
Whether S_ID exists, 4... Conditional branch: transmission mode is 8
Whether there are two or more TS_IDs corresponding to PSK, 5
... Processing instruction: TS_I whose transmission mode corresponds to 8PSK
D selects the minimum TS_ID from D and outputs TS. 6 Processing instruction: T whose transmission mode corresponds to 8PSK
Select S_ID and output TS. 7 ... Conditional branch: Whether there is a TS_ID whose transmission mode corresponds to QPSK, 8 ... Conditional branch: T whose transmission mode corresponds to QPSK.
Whether two or more S_IDs exist, 9 ... Conditional branch: TS_ with the highest coding rate and transmission mode corresponding to QPSK
Whether or not there are two or more IDs. 10 Processing instruction: Selects the minimum TS_ID from TS_IDs corresponding to QPSK with the highest coding rate and outputs TS. 11 Processing instruction: Transmission mode is QPSK. 12: processing instruction: selecting a TS_ID corresponding to QPSK having the highest coding rate and outputting a TS, 13: processing instruction: selecting a minimum TS_ID , Outputting TS, 14 processing instruction: not outputting TS, 21 tuner, 22 digital demodulation, 23 transmission line decoding, 24 transmission multiplex control information decoding, 25 control microcomputer 2, 26 transport stream Packet separation / selection, 27: MPEG decoder, 28: Video processing, 2
9: audio processing, 30: A / D converter, 31: microcomputer interface, 32: control microcomputer 1, 33: external control means, 41: data processing, 42: digital recording processing, 43: digital reproduction processing, 44: recording unit 51, display unit, 52, audio playback unit, 63, satellite digital broadcast receiver, 64, channel decoder integrated circuit, 65, television with built-in satellite digital broadcast receiver, 66, video recording and playback device,
67: front end, 100: high frequency input terminal, 10
DESCRIPTION OF SYMBOLS 1 ... Input pin, 110 ... TS output terminal, 111 ... Video output terminal, 112 ... Audio output terminal, 113 ... TS packet output pin, 114 ... Microcomputer interface pin, 11
5 ... Microcomputer interface terminal.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04H 1/00 H04J 3/00 H04L 27/22 H04N 7/24 F term (reference) 5C059 KK00 MA00 PP04 RA04 RB02 RB14 RC01 RC11 RD07 RF04 SS02 TA00 TB04 TC43 TD01 UA05 5C063 AA20 AB03 AB07 AB11 AB13 AC01 AC05 AC10 CA11 CA23 CA31 DA07 DA13 DB10 5K004 AA05 FA03 FA05 FA06 FG02 5K028 AA00 EE03 FF13 KK01 KK03 SS15

Claims (16)

[Claims] A plurality of transport streams each having a frame configuration in which video, audio, and data are compressed and multiplexed; transmission multiplex control information indicating a configuration and a modulation scheme of the plurality of transport streams having a frame configuration; In a receiver for receiving a signal obtained by digitally modulating a burst signal inserted in a stream, a transport stream for outputting a transport stream even when a transport stream ID for identifying a TS in the transmission multiplex control information is not specified. output method. 2. The system according to claim 1, further comprising: when starting up the receiver, when resetting the receiver, or when switching the satellite to be received, a transport having the smallest value from the transport stream ID information in the transmission multiplex control information. 2. The transport stream output method according to claim 1, wherein a stream ID number is selected, and a transport stream according to the transport stream ID is output. 3. When starting up the receiver, resetting the receiver, or switching a satellite to be received, the transmission mode information in the transmission multiplex control information is used to determine a higher layer or a higher coding rate. 2. The transport stream output method according to claim 1, wherein a transport stream ID number corresponding to the transmission signal is selected, and a transport stream according to the transport stream ID is output. 4. A tuner, a digital demodulation means, an error correction decoder, a transmission path decoding means having deinterleaving and inverse power spreading, and a decoding control means for controlling the transmission path decoding means based on the transmission multiplex control information. 4. A receiver having a means for separating / selecting a transport stream and a means for separating packet information of a selected transport stream, wherein a transport stream output when a transport stream ID is not specified is output as described in claim 1 to 3. A receiver using the transport stream output method according to any one of the above. 5. A transmission line decoding unit having a digital demodulation unit, an error correction decoder, a deinterleave and an inverse power spreading, a transmission line multiplexing control information decoding unit, and a separation / selection unit for a multiplexed transport stream. 4. An integrated circuit which comprises means for separating transport stream packet information and outputs transport stream packets and transmission multiplex control information, wherein the transport stream output method according to claim 1 is used. An integrated circuit, comprising: 6. The receiver according to claim 4, further comprising video processing means, audio processing means, image display means, and audio reproduction means. A receiver using a transport stream output method. 7. A tuner, a transmission line decoding means including a digital demodulation and error correction decoder, a deinterleave and an inverse power spreading, a decoding control means for controlling decoding by multiplex control information, and a separation of a multiplexed transport stream. A receiver comprising a selection unit and a recording / reproducing unit, wherein the receiver uses the transport stream output method according to any one of claims 1 to 3. 8. A tuner, a transmission line decoding means including digital demodulation and error correction decoder, deinterleaving and depower spreading, a decoding control means for controlling decoding by multiplex control information, and a separation of a multiplexed transport stream. A receiver in which the selection means is disposed in one housing, wherein the transport stream output method according to any one of claims 1 to 3 is used. 9. A receiving means for receiving a plurality of multiplexed transport streams, transmission multiplex control information indicating a configuration and a modulation scheme of the plurality of transport streams, and the transport unit included in the transmission multiplex control information. Control means for selecting a transport stream ID for identifying a stream by designating, based on the transport stream ID specified by the control means, from the plurality of multiplexed transport streams received by the receiving means; A receiver comprising separation and selection means for separating and selecting a desired transport stream, wherein the control means selects a transport stream ID even when the transport stream ID is not specified. Machine. 10. The receiver according to claim 9, further comprising output means for outputting video and / or audio based on the desired transport stream separated and selected by said separation and selection means. 11. The receiver according to claim 9, further comprising recording / reproducing means for recording / reproducing a desired transport stream separated and selected by said separation / selection means. 12. An input means for inputting a plurality of multiplexed transport streams and transmission multiplex control information indicating a configuration and a modulation scheme of the plurality of transport streams, and said transport unit included in said transmission multiplex control information. Control means for selecting a transport stream ID for identifying a stream by designating, based on the transport stream ID designated by the control means, from the plurality of multiplexed transport streams inputted by the input means; An integrated circuit provided with separation and selection means for separating and selecting a desired transport stream, wherein the control means selects a transport stream ID even when the transport stream ID is not specified. circuit. 13. The receiver according to claim 9, wherein said control means selects a transport stream ID having the smallest value among said transport stream IDs. 14. The integrated circuit according to claim 12, wherein said control means selects a transport stream ID having the smallest value among said transport stream IDs. 15. The control means selects a transport stream ID corresponding to a transmission signal of a higher layer or a higher coding rate from the transport stream ID based on transmission mode information in the transmission multiplex control information. The receiver according to any one of claims 9 to 11, wherein: 16. The control means selects a transport stream ID corresponding to a transmission signal of a higher layer or a higher coding rate based on transmission mode information in the transmission multiplexing control information among the transport stream IDs. The integrated circuit according to claim 12, wherein: