CN100380986C - Method for synchronizing service component of digital multimedia broadcasting receiver - Google Patents
Method for synchronizing service component of digital multimedia broadcasting receiver Download PDFInfo
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- CN100380986C CN100380986C CNB2005100330430A CN200510033043A CN100380986C CN 100380986 C CN100380986 C CN 100380986C CN B2005100330430 A CNB2005100330430 A CN B2005100330430A CN 200510033043 A CN200510033043 A CN 200510033043A CN 100380986 C CN100380986 C CN 100380986C
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Abstract
The present invention relates to a method for synchronizing service components for a digital multimedia broadcast receiver, particularly to a method for synchronizing transmitted multiple service components by using a transmitted frame composed of a synchronization channel, a high-speed information channel FIC and a main service channel MSC to receive the transmitted multiple service components, which comprises the steps that the transmitted frame is divided into the FIC and the MSC; services desired by users are selected by using the separated FIC information; video and audio additional data into which CIF counting information is plugged is generated by decoding the additional data of the FIC and the MSC which correspond to the selected services by the users and CIF (common intersection frame) counting information contained in the FIC together; the decoded video and audio additional data is displayed or outputted by a loudspeaker according to the plugged CIF counting order of the FIC. The present invention achieves the effect that the synchronization among different service components is coordinated, and then playing actions are carried out through the steps.
Description
(1) technical field
The invention relates to DMB (DMB) receiver, especially about in DMB (DMB) receiver, to having the method for synchronizing service component of a kind of digital multimedia broadcast receiver that mutual service component of different nature coordinates.
(2) background technology
The service that defines in the Eureka-147 system can have a plurality of service components (Service Component).The data that constitute above-mentioned service component can be the dynamic image datas that is merged by video and audio frequency, also can be not have video, are merely able to hear the audio frequency of music, can also be the data that show such as the additional information of transport information etc.
Under the situation of the data that the constitute above-mentioned service component moving image that to be videos merge with audio frequency,, therefore, need only data are just passable to the picture and the loudspeaker plays of receiver owing to there is the specification that realizes video and audio sync (sync).
But, in the process of playing moving image, in the time of should display additional information or in the process of the video of watching moving image, when listening to the music of other service component, do not have the synchronous method of coordinating between each service component.
(3) summary of the invention
To the objective of the invention is in order addressing the above problem, to provide a kind of having the method for synchronizing service component of a kind of digital multimedia broadcast receiver that mutual service component of different nature coordinates in DMB (DMB) receiver.
To achieve these goals, the method for synchronizing of the service component of digital multimedia broadcast receiver of the present invention is made of following step, and as feature: receive a plurality of service components that transmit in order to utilize the transmission frame that constitutes by synchronization channels, FIC (high speed information channel) and MSC (main service channel), the frame of above-mentioned transmission is separated into the step of FIC and MSC; Utilize the information of the FIC behind above-mentioned FIC of being separated into and the MSC, select the step of the service that the user wishes; Additional data and the normal crossing access frame CIF count information of MSC in being included in above-mentioned FIC of FIC by service correspondence that above-mentioned user is selected are decoded, and generate the step of video, audio frequency or additional data that above-mentioned CIF count information inserts respectively; According to the counting sequence of above-mentioned CIF count information, show video, audio frequency, the additional data of above-mentioned decoding or the step of exporting by loud speaker.
The feature of the method for synchronizing of the service component of digital multimedia broadcast receiver of the present invention is: when the user selects different more than one services, the CIF count information that above-mentioned more than one service has is respectively decoded, the video/audio additional data of decoding shown simultaneously according to above-mentioned CIF counting sequence or to loud speaker output, coordinate each other synchronously.
The feature of the method for synchronizing of the service component of digital multimedia broadcast receiver of the present invention is: above-mentioned CIF count information is each information that transmits inner first FIB (high speed information piece) of FIC lining loading of frame.
The feature of the method for synchronizing of the service component of digital multimedia broadcast receiver of the present invention is: above-mentioned MSC (main service channel) is made of video and voice data.
The feature of the method for synchronizing between the service component of DMB receiver of the present invention is: above-mentioned FIC (high speed information channel) also comprises the notice additional information data, the information of MSC (main service channel) data structure.
The feature of the method for synchronizing of the service component of digital multimedia broadcast receiver of the present invention is: the MSC decoding step during the additional data of the FIC of the service correspondence that above-mentioned user selects and the normal crossing access frame CIF count information of MSC (main service channel) in being included in above-mentioned FIC are decoded is a step of utilizing the data structure information of the MSC that above-mentioned FIC (high speed information channel) comprises to decode.
Effect of the present invention:
The method for synchronizing service component of DMB of the present invention (DMB) receiver utilizes the service count information of FIC (high speed information channel), thereby reaches the effect of coordinating between different service components of playing synchronously.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is for principle of the present invention being described, the structural representation of the DMB transmission frame of demonstration.
Fig. 2 is for principle of the present invention being described, the structural representation of the DMB transmission frame of the transfer mode 1 of the DMB receiver of demonstration.
Fig. 3 utilizes above-mentioned DMB to transmit frame, and the structural representation of the DMB integral body of active service is provided.
Fig. 4 is the simple structural representation of DMB receiver of the present invention.
Fig. 5 is the structural representation of data storage of the decoding of one embodiment of the invention.
Fig. 6 is the structural representation of data storage of the decoding of another embodiment of the present invention.
The symbol description of major part in the accompanying drawing:
101: tuner 102:OFDM wave detector
103: channel decoder 104: control part
105: audio decoder 106: Video Decoder
107: data decoder
(5) embodiment
Embodiment to the method for synchronizing of the service component of DMB of the present invention (Digital Radio Broadcasting is hereinafter to be referred as DMB) receiver is elaborated below with reference to accompanying drawings.
Fig. 1 is for principle of the present invention being described, the structural representation of the DMB transmission frame of demonstration.
The high speed information channel) and MSC (Main Service Channel: main service channel) constitute as shown in Figure 1, DMB transmits frame by synchronization channels (Synchronization Channel), FIC (Fast Information Channel:.
(Fast Information Block: the high speed information piece) constitute, MSC is by a plurality of CIF (Common Interleaved Frame: normal crossing access frame) constitute by a plurality of FIB for above-mentioned FIC.Transfer mode (Transmission mode) difference, the quantity difference of above-mentioned FIB (high speed information piece) and CIF (normal crossing access frame).
The FIB of different transfer modes and quantity such as the following table 1 of CIF.
[table 1]
| Transfer mode | Each transmits the quantity of the FIB of frame | Each transmits the quantity of the CIF of frame |
| I | 12 | 4 |
| II | 3 | 1 |
| III | 4 | 1 |
| IV | 6 | 2 |
As above shown in the table 1, in Korea S, when transfer mode I was adopted as mode standard, each quantity that transmits the FIB of frame was 12, and the quantity of CIF is 4, and this content is seen Fig. 2.
As shown in Figure 2, the transmission frame of transfer mode 1 loads 4 CIF in MSC, load 12 FIB in FIC, and in above-mentioned 12 FIB, 3 FIB have the information of a CIF.
That is, among the CIF in last MSC, have video data, real data such as voice data notify the information of the structure of these data to be arranged in the FIB of above-mentioned FIC.
Above-mentioned FIC (high speed information channel) is by SI (Service Information: information on services), FIDC (Fast Information Data Channel: the high speed information data channel), MCI (Multiplex Configuration Information: multi-factor structure information), CA (Conditional Access: condition receives) constitutes, above-mentioned MCI comprises the type service of MSC (main service channel), the position, the information of form etc. is used to explain MSC.
And, above-mentioned SI comprises the service exercise question, channel information etc., above-mentioned FIDC is used for requiring such as Paging, TMC (Traffic Message Channel: Traffic Message Channel), emergency alert system) (Emergency Warning Systems: emergency data service such as, in order only to offer the entrant who has authenticated special services, CA (condition reception) is provided with password with the information row and uses EWS.
And, in first FIB of each transmission frame, loaded CIF (normal crossing access frame) counting (count) information, utilize this numerical value, calculate the CIF counting of each FIB and CIF correspondence.
Therefore, receiver is decoded (decoding) to data with CIF unit, for the user provides video and audio service with reference to FIC (high speed information channel) information.
Fig. 3 utilizes above-mentioned DMB to transmit frame, and the structural representation of the DMB integral body of active service is provided.
As shown in Figure 3, a DMB integral body (Ensemble) is by a plurality of services (Alpha (ALPHA) 1 radio, beta (BETA) radio, Alpha (ALPHA) 2 radio, ...) constitute, each service is made of a plurality of service components (service component) respectively.
Therefore, it is tuning that the DMB receiver can be that unit carries out with integral body, also can be only decoding (decoding) be advanced in a service in a plurality of services of the integral body selected, and the user can listen to and watch.
And, the DMB stream that additional information such as above-mentioned service component can be audio stream (Audio stream), transport information and video and audio frequency merge etc.In these service components, additional informations such as above-mentioned transport information are loaded among the interior FIDC (high speed information data channel) of FIC (high speed information channel), and remaining is loaded among the MSC (main service channel).
The user can select in the interior a plurality of services of this integral body, in the service component in the service of selecting, also can select the data of wishing.
That is, for instance, when the user selects " Alpha's 1 radio ", in above-mentioned " Alpha's 1 radio " service, provide audio frequency, transport information (TMC), the service exercise question, the channel information service can be selected one from above-mentioned service component.As shown in Figure 3, above-mentioned information stores is to the interior FIDC (high speed information data channel) of FIC (high speed information channel), in the inferior channel 63 of inferior channel a, b, c...... and the MSC of MSC (main service channel).
And, when the user selects " beta radio ", the DMB-1 and the audio service that in above-mentioned " beta radio " service, provide video and audio frequency to merge.In this case, the user selects in the above-mentioned service, can enjoy corresponding service.
In this case, if when the user selects above-mentioned " Alpha's 1 radio ", the user selects above-mentioned transport information, when watching these information, also can hear and the irrelevant music broadcast of above-mentioned transport information.
And, when selecting " beta radio ",, also can hear different audio frequency Yi Bian watch the video of above-mentioned DMB-1.
Like this, video by will belonging to different service components and audio frequency or additional information are coordinated mutually, synchronously, play, and the user can watch and listen to the broadcasting of oneself liking.For this content, be elaborated with reference to the simple structural representation of Fig. 4 DMB receiver of the present invention.
As shown in Figure 4, transmit frame if receive, by channel decoder 103 with FIC in the above-mentioned transmission frame and MSC information separated, FIC information to above-mentioned separation in control part 104 manages, and only the data of the service that the user is selected transmit to audio decoder 105, Video Decoder 106, data decoder 107.
At this moment, the interface that transmits data can connect by memory, also can directly connect according to series connection (serial) or (parallel) in parallel.
At this moment, in the data that transmit to above-mentioned audio decoder 105, Video Decoder 106, data decoder 107, append CIF (normal crossing access frame) count information, by decoding in above-mentioned audio decoder 105, Video Decoder 106, data decoder 107, coordinate between each service component synchronously.
Promptly, when above-mentioned audio decoder 105, Video Decoder 106, data decoder 107 are decoded to each data, if each service component also transmits the CIF count information, after decoding finishes, on picture, show or when export, coordinate synchronous between each service component by loud speaker.Below, with reference to accompanying drawing this content is elaborated.
Fig. 5 is the structural representation of data storage of the decoding of one embodiment of the invention.
The data memory structure of Fig. 5 is in the DMB of above-mentioned Fig. 2 overall structure, the structure of the state of the decoding that shows when selecting " Alpha's 1 radio ", and it comprises transport information, information on services, the voice data of FIDC.
Promptly, the traffic information data that loads among the FIDC (high speed information data channel) has shown all decodes the information of 5 CIF (normal crossing access frame) correspondence, store in the memory, information on services has shown the information decoding of 4 CIF correspondences and has stored in the memory, voice data has shown that decode time is long, only the state that 2 CIF are decoded.
In this case, under the control of control part 104, the service component of CIF counting mediation 100 if when showing, by loud speaker output, Yi Bian see transport information in display frame, by loud speaker, can be heard the music broadcast of hope on picture.Then, the service component and the output of CIF (normal crossing access frame) counting mediation 101, coordinate synchronization.
Fig. 6 is the structural representation of data storage of the decoding of another embodiment of the present invention.
The structure of Fig. 6 is when decoding " beta radio " in the DMB of above-mentioned Fig. 2 overall structure, the schematic diagram of the memory storing state that the data of decoding show, and it comprises the DMB-1 and the voice data of video and audio frequency combination.
Usually, the decode time of video data and voice data is different, compares with audio frequency, and the decode time of video is longer.
Therefore, when the user selects the DMB-1 of video and audio frequency merging in the 100th CIF, suppose since the 101st CIF, video is selected DMB-1, other service component of audio selection, in this case, CIF counting is that video and the audio frequency of 100 DMB-1 play according to the method for synchronization of different size, and the CIF counting is that video and the 2nd voice data of 101 can be play simultaneously.
According to this method, utilize the CIF count information that loads in the FIC, can coordinate between each service component synchronously.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (6)
1. the method for synchronizing service component of a digital multimedia broadcast receiver, described service component is meant that utilization receives a plurality of service components that transmit by the transmission frame that synchronization channels, high speed information channel FIC and main service channel MSC constitute, and is characterized in that described method for synchronizing service component is made of following step:
The frame that transmits is separated into the step of FIC and MSC;
Utilize the information of the FIC behind above-mentioned FIC of being separated into and the MSC, select the step of the service that the user wishes;
Additional data and the normal crossing access frame CIF count information of MSC in being included in above-mentioned FIC of FIC by service correspondence that above-mentioned user is selected are decoded, and generate the step of video, audio frequency or additional data that above-mentioned CIF count information inserts respectively;
According to the counting sequence of above-mentioned CIF count information, show video, audio frequency, the additional data of above-mentioned decoding or the step of exporting by loud speaker.
2. the method for synchronizing service component of digital multimedia broadcast receiver as claimed in claim 1 is characterized in that:
In the step of the service that described selection user wishes, when the user selects different more than one services, the normal crossing access frame CIF count information that described more than one service has is respectively decoded, video, audio frequency, the additional data of decoding shown simultaneously according to described CIF counting sequence or, coordinate synchronous each other to loud speaker output.
3. the method for synchronizing service component of digital multimedia broadcast receiver as claimed in claim 1 is characterized in that:
Described CIF count information is that each transmits the information of loading in inner first high speed information piece FIB of high speed information channel FIC of frame.
4. the method for synchronizing service component of digital multimedia broadcast receiver as claimed in claim 1 is characterized in that:
Described MSC is made of video and voice data.
5. the method for synchronizing service component of digital multimedia broadcast receiver as claimed in claim 1 is characterized in that:
Described FIC also comprises the notice additional information data, the information of the structure of MSC data.
6. the method for synchronizing service component of digital multimedia broadcast receiver as claimed in claim 1 is characterized in that:
MSC decoding step during the additional data of the FIC of the service correspondence that above-mentioned user selects and the normal crossing access frame CIF count information of MSC in being included in above-mentioned FIC are decoded is a step of utilizing the data structure information of the MSC that described FIC comprises to decode.
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| EP2739045A3 (en) * | 2006-07-20 | 2014-07-30 | Electronics and Telecommunications Research Institute | Method for generating the counter block value |
| EP2062164A4 (en) * | 2006-09-06 | 2010-06-23 | Intel Corp | A media playing tool with a multiple media playing model |
| CN101166278B (en) * | 2006-10-20 | 2012-01-11 | 黑龙江大学 | Method for video, audio and synchronization control under network interaction environment |
| CN101094025B (en) * | 2006-12-08 | 2011-06-15 | 北京新岸线移动通信技术有限公司 | Method for implementing multiple demodulation modes at the receiving end of T-MMB system |
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| CN1240075A (en) * | 1996-11-05 | 1999-12-29 | 世界空间公司 | Direct satellite direct broadcast system |
| US6072839A (en) * | 1997-07-24 | 2000-06-06 | Lucent Technologies, Inc. | DVB frame synchronization |
| US6151374A (en) * | 1996-03-04 | 2000-11-21 | Mitsubishi Denki Kabushiki Kaisha | Synchronizing signal detecting apparatus |
| JP2001345763A (en) * | 2000-06-05 | 2001-12-14 | Kenwood Corp | Method and device for generating dab signal |
| US20020080887A1 (en) * | 2000-10-20 | 2002-06-27 | Young-Ho Jeong | In-band adjacent-channel digital audio broadcasting system |
| KR20040049516A (en) * | 2002-12-06 | 2004-06-12 | 한국전자통신연구원 | Apparatus for detecting synchronous signal |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6151374A (en) * | 1996-03-04 | 2000-11-21 | Mitsubishi Denki Kabushiki Kaisha | Synchronizing signal detecting apparatus |
| CN1240075A (en) * | 1996-11-05 | 1999-12-29 | 世界空间公司 | Direct satellite direct broadcast system |
| US6072839A (en) * | 1997-07-24 | 2000-06-06 | Lucent Technologies, Inc. | DVB frame synchronization |
| JP2001345763A (en) * | 2000-06-05 | 2001-12-14 | Kenwood Corp | Method and device for generating dab signal |
| US20020080887A1 (en) * | 2000-10-20 | 2002-06-27 | Young-Ho Jeong | In-band adjacent-channel digital audio broadcasting system |
| KR20040049516A (en) * | 2002-12-06 | 2004-06-12 | 한국전자통신연구원 | Apparatus for detecting synchronous signal |
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