CN1521966B - Multimedia data rebuilding method through DAB receiver - Google Patents
Multimedia data rebuilding method through DAB receiver Download PDFInfo
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- CN1521966B CN1521966B CN 200410003975 CN200410003975A CN1521966B CN 1521966 B CN1521966 B CN 1521966B CN 200410003975 CN200410003975 CN 200410003975 CN 200410003975 A CN200410003975 A CN 200410003975A CN 1521966 B CN1521966 B CN 1521966B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000013500 data storage Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 244000287680 Garcinia dulcis Species 0.000 claims description 3
- 230000001934 delay Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/16—Arrangements for broadcast or for distribution of identical information repeatedly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]
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Abstract
A method for reconstructing multimedia object data in a digital-audio-broadcast (DAB) receiver. The data are transmitted using the multimedia-object-transfer (MOT) protocol in a segmented manner. Data segments (K-SEG, R-SEG) have for header data and root data respectively segment numbers (x) corresponding to their sequence in the header portion or root portion of the associated multimedia object. The segment numbers are provided in headers (SK) attached to each segment. The received data segments (SEG) are stored in a data memory (8) in a memory position which is chosen, depending on the segment number (x) and the data segment size (n), in such a manner that the data segments (SEG) of the header portion or root portion of a multimedia object are stored in the memory region continuously one after the other in the sequence of segment numbers (x). The need for intermediate buffer storage is eliminated and time delays are reduced.
Description
Technical field
The present invention relates to rebuild the method for multimedia object data with digital audio broadcasting (DAB) receiver, described data are with multimedia object conversion (MOT) protocol transmission, wherein multimedia object is pressed the data segment segment transmissions, and can be identified in the data flow with transmission and identify, and wherein have separately and its title division or corresponding segment number of the order in the torso portion at affiliated multimedia object for the data segment of title data and trunk data.
The invention still further relates to a kind of digital audio broadcasting (DAB) receiver in addition, described receiver has reconstruction unit and is used for the multimedia object data that decoding transmits with multimedia object conversion (MOT) agreement, wherein multimedia object is transmitted with the data segment piecewise, and can be identified in the data flow with transmission and identify, and wherein for the data segment of title data and trunk data have separately with its at the title portion of affiliated multimedia object or the corresponding segment number of order in the trunk.
Background technology
European standard EN300 401 " radio broadcasting systems; Digital audio broadcasting (DAB) to that move, portable and fixing receiver " stipulated the method for wideband transmit digital audio-frequency data.Can also in transmitting data flow, transmit multi-medium data together with voice data.European standard EN301 234 has defined " digital audio broadcasting (DAB), multimedia object conversion (MOT) agreement for this reason.The multimedia object data can have form and form arbitrarily, such as text, image, video or the like.
In these multimedia object data with so-called program related data (PAD) or with the transmission of the group mode of so-called DAB data flow.Therefore the output place apolegamy at PAD decoder and/or group mode decoder is provided with the reconstruction unit that is referred to as the MOT decoder in the DAB receiver.
Multimedia object transmits (MOT) agreement regulation, hereinafter is called the multimedia object of MOT object and is made up of title-core, header extension part and the torso portion of 7 bytes.Title-core contains relevant for the size of object and the information of content, goes decoding and shows the MOT object thereby the DAB receiver can determine whether enough resources.Header extension partly contains the information that support target is handled, for example memory indication.Torso portion comprises the original data of the multimedia object that will transmit.
For transmission MOT object will be divided into header segment and torso section to it at least.Each section is segmented into a data set more at least.Data set embedded in the transmitting data stream and once or repeatedly independently of one another send.The transmission of data set for example can be carried out at so-called data carousel, wherein for example launches the data set of MOT object at first successively.Repeat this process then repeatedly.Can imagine, produce the data set of repeatedly launching a data set and then launching MOT object subsequently more repeatedly, up to the data set that has transmitted whole MOT objects.
In order transmitting data set to be packed in so-called MSC (MSC) data set, wherein to be provided with and to transmit sign (transmitting ID) and be used to discern so-called " dialogue mark ".The type that also contains data segment in this external data set-title.Type 3 is represented header segment and type 4 and 5 is represented torso section.
Data segment has section header in addition, has wherein write down size of section or the like.Each of header segment section has continuous segment number in addition.Described segment number is correspondingly counted apart from each other for the title division-data segment and the torso portion data segment of MOT object.Segment number is recorded in the MSC data set " session title ".
Also total size of the amount of recording part and total size of torso portion in the title-core of MOT object.
Divide the title division or the torso portion of corresponding M OT object to such an extent that make it to have constant section size.Have only the last section of title division or torso portion just the size that departs from it can be arranged.The remaining data byte of this section of depending on.Thereby last data segment need not empty information filling.
The maximum of a data segment is 8 K bytes.
When receiving the MOT object, at first to wait for routinely until the title data section that receives the MOT object.After title division all receives and exists in the working storage, just to decoding.Then the data segment of the affiliated MOT object data torso portion that constitutes is collected in the working storage.All torso portion data segments have all received back just decoding MOT object and have been stored in the working storage together.So can further handle and show the MOT object of such storage.
The method of this reconstruction multimedia object data causes temporal delay unfriendly, because at first must wait for the title division that receives the MOT object.To load the DAB receiver in addition with impacting.Because after receiving all data that are subordinated to the MOT object, must transfer to data on another medium from working storage.
Because the process of store M OT object is longer, may incur loss through delay the follow-up title data section of reception.Thus may the time of occurrence loss.
Summary of the invention
Therefore task of the present invention is, create the method for improving that is used to rebuild the multimedia object data, and the digital audio broadcast receiver that has improved, and reduces and effectively utilizes system resource thereby especially can reach cost.
Described task uses these class methods according to the present invention by the data segment that receives being stored in the data storage on the memory location in the storage area of multimedia object reservation, and described memory location depends on that segment number so selects: make the title division of multimedia object or the data segment of torso portion be stored in continuously in the described memory block mutually by segment number.
Thereby the information of the data segment that utilize to receive according to the present invention is with the size and the position of current data section in the MOT object of the expectation of the MOT object under calculating.Needed memory location in the data storage can be occupied immediately then, and intermediate storage need be in working storage, do not carried out.Thereby can after reception, collect in data segment in the storage area that keeps into the MOT object corresponding to its order in the MOT object immediately.Fully receive the MOT object and storage just can decode immediately after advancing data storage.
Then, if title division or torso portion have unique data segment, just data segment is left in the place that begins for the storage area of the title division of affiliated multimedia object or torso portion setting.
Especially the data segment that will store be the affiliated title division of MOT object or torso portion last data segment in particular cases, select the memory location relatively with the affiliated title division of the multimedia object of former reception and storage or the section size of torso portion data segment.This why be necessary be because last data segment is different as much as possible with the big I of constant data section of the former data segment of affiliated title division or torso portion.
If the title division under not receiving or the previous data segment of torso portion, the last data segment of just discarding reception, this why be necessary be just can not calculate the memory location in default of constant data segment size to previous data segment.
Should select the memory location pro rata at the inner product of the storage area that affiliated multimedia object is kept with segment number and section size.This makes the linearity storage that can reach respective memory regions address.
In addition, if a title division of the multimedia object that receives or torso portion tabulation are favourable.Whether received data segment can not consider the data segment of multiple transmission by means of the check of the segment number in the tabulation then.
The reception fully of multimedia object be can check, the title division of each multimedia object and the big small amt of data segment of torso portion wherein obtained.Then the size of the sum of obtaining with the multimedia object that provides in the data of title division compared.
Described task also solves by the digital audio broadcast receiver of described type, wherein is configured for implementing the reconstruction unit of method discussed above.This for example can be by the integrated switching circuit of permanent wiring or is preferably undertaken by software programming.
Description of drawings
Explain the present invention with reference to the accompanying drawings.In the accompanying drawings:
Fig. 1 is the block diagram that has the known DAB receiver of MOT decoder;
Fig. 2 is the schematic diagram that multimedia object is resolved into the known technology of MOT object data segment and data set;
Fig. 3 is the location schematic diagram of the data segment that receives in the data storage according to an embodiment of the invention;
Embodiment
Fig. 1 is the block diagram corresponding to the digital audio broadcast receiver of the definition of DAB standard ETS-EN300.The DAB receiver has HFS 1, and the signal processing unit 2 that connects after having is used for carrying out signal decoding with fast Fourier transform FFT, has signal separating method and has channel-decoding.Audio data stream is decoded in audio decoder 3 and is reset with loud speaker 4.
Be provided with PAD decoder 5 in addition and be used for decoding program related data PAD, and be provided with packet decoder 6 and be used to carry out packet decoding.Data segment according to the definition of DAB standard can be provided on the output of PAD decoder 5 and group mode decoder 6, described data segment is transported in the multimedia object conversion decoder 7.At least this so-called MOT decoder 7 and a data memory 8 are coupled, to store the data of the multimedia object that is transmitted.Multimedia object data M OD and possible additional information are prepared to reset through another data processing unit 9 or appropriate software.
Then multimedia object data M OD is transmitted according to multimedia object conversion protocol segmentation ground.This is schematically shown in Figure 2.Multimedia object data M OD is divided into the torso portion of the MOT object in the trunk data segment.The MOT object has title-core in addition, and might have the header extension part according to DAB-MOT standard ETS-EN301 234 definition.Title division is divided into again among the data segment K-SEG, and described data segment K-SEG correspondingly has a section header SK and a segment data part SD.Size of the section of indicating or the like in section header.
Trunk data segment R-SEG also transmits with section header SK and segment data part SD in corresponding data segment.
Data segment SEG transmits with data set title DGH (Data Group Header), so-called dialogue title SH, data set-data field DG (Data Group Field) and the so-called MSC data set of option CRC in data segment.Data set title DGH comprises the type of data segment SEG.Numeral 3 indicates title division like this, and numeral 4 and 5 indicates torso portion.
A transmission identification code (transmission ID) is arranged, the MOT object under described transmission identification code indicates among this external dialogue title SH.Thereby can be with reference to MOT object identification data section SEG.
Each data segment and data set irrespectively are linked in the transport stream in time each other, consecutive transmissions repeatedly under certain situation.
In order to rebuild the data of MOT object, at this moment analyze number number according to the segment number of the data segment SEG of reception of the present invention, and in meaning as shown in Figure 3, the data segment SEG that receives according to correct data segment sequential storage in the data storage 8 in the memory block for the reservation of MOT object.Depend on that in this memory location segment number x and data segment size n so selects: make data segment K-SEG, the R-SEG of the title division of MOT or torso portion be stored in successively in the storage area of MOT object continuously by the order of segment number x.
If receiver section x=2 at first stores it with the product of segment number x=2 and constant data segment size n in a memory location pro rata according to the length n of known MOT object.Because whether described data segment relates to the information of the last data segment of MOT object in addition, can go to calculate the memory location with the data segment size n of current data section SEG.As long as the data segment SEG of storage is the final data section SEG of MOT object, just adopt the constant data segment size n of previous data segment SEG to calculate the memory location.The reason that must do like this is that last data segment SEG has little data segment size m≤n as far as possible, less than the data segment size n of past data section SEG.
Then receive data segment SEG, and correspondingly before having the data segment SEG of segment number 2, store in the data storage 8 with segment number 1.Receive data segment SEG with segment number 0 then, and storage is advanced in the data storage 8 before having the data segment SEG of segment number 1.Receive data segment SEG with segment number 3 at last, and directly have segment number 2 on store in the data storage 8 after a data segment SEG.The store location that can have the final data section SEG of segment number 3 as described above by the constant size of data that depends on the past data section.
Claims (8)
1. rebuild the method for multimedia object data (MOD) with digital audio broadcasting (DAB) receiver, described data are with multimedia object conversion (MOT) protocol transmission, wherein multimedia object is pressed data segment (SEG) segment transmissions with segmented mode, and can be identified in the data flow with transmission and identify, and wherein for the data segment (K-SEG of title data and trunk data, R-SEG) have separately and its title division or corresponding segment number of the order in the torso portion (x) at affiliated multimedia object, wherein, received data segment (SEG) stores in the data storage (8), on the memory location in the storage area that keeps for multimedia object, according to segment number (x) and data segment size (n) thus the described memory location of selection makes the title division of multimedia object or the data segment (K-SEG of torso portion, R-SEG) be stored in continuously in the described memory block mutually by segment number (x) order.
2. the method for claim 1, it is characterized in that, if title division or torso portion have unique data segment, just data segment (SEG) is left in the place that begins that title division or torso portion for affiliated multimedia object are provided with storage area.
3. the method for claim 1 is characterized in that,
If the data segment (SEG) of storage is the last data segment (SEG) of affiliated title division or torso portion, then the data segment (SEG) that receives and store according to the previous institute under its title division of multimedia object or the torso portion is selected the memory location.
4. method as claimed in claim 3 is characterized in that, if do not receive the affiliated title division or the previous data segment (SEG) of torso portion, just discards the last data segment (SEG) of reception.
5. as the described method of one of claim 1-4, it is characterized in that, select the memory location pro rata at the inner product of multimedia object storage area with segment number (x) and data segment size (n).
6. as the described method of one of claim 1-4, comprise: the segment number (x) of the data segment (SEG) of the affiliated title division of the multimedia object that receives or torso portion is listed, whether receive data segment (SEG) by means of the check of the segment number (x) in the tabulation, and ignored the data segment (SEG) that is repeatedly transmitted.
7. as the described method of one of claim 1-4, comprise: the title division by obtaining multimedia object and the data segment size (n) of torso portion and check multimedia object whether to be received fully, and obtain and compare with the size of the multimedia object that in the data of title division, provides.
8. a digital audio broadcasting (DAB) receiver, described receiver has reconstruction unit and is used for the multimedia object data (MOD) that decoding transmits with multimedia object conversion (MOT) agreement, wherein multimedia object is transmitted with data segment (SEG) piecewise, and can in data flow, identify with transmitting sign (transmitting ID), and wherein for the data segment (K-SEG of title data and trunk data, R-SEG) have separately and its title division or corresponding segment number of the order in the torso portion (x) at affiliated multimedia object, it is characterized in that, constitute reconstruction unit to implement method as one of above claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003105657 DE10305657A1 (en) | 2003-02-12 | 2003-02-12 | Method for the reconstruction of multimedia object data with digital audio broadcast (DAB receiver) |
| DE10305657.2 | 2003-02-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1521966A CN1521966A (en) | 2004-08-18 |
| CN1521966B true CN1521966B (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410003975 Expired - Fee Related CN1521966B (en) | 2003-02-12 | 2004-02-12 | Multimedia data rebuilding method through DAB receiver |
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| Country | Link |
|---|---|
| CN (1) | CN1521966B (en) |
| DE (1) | DE10305657A1 (en) |
| GB (1) | GB2398467B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1984826A4 (en) * | 2006-02-13 | 2010-12-15 | Vividas Technologies Pty Ltd | Method, system and software product for streaming content |
| CN101132243B (en) * | 2006-07-17 | 2013-01-09 | 北京新岸线移动通信技术有限公司 | Design method for FIC new configuration in T-MMB system compatible with DAB |
| KR100834960B1 (en) * | 2006-08-21 | 2008-06-03 | 삼성전자주식회사 | Digital broadcast receiver and its content processing method |
| PL2210366T3 (en) * | 2007-10-26 | 2019-08-30 | Jean Chouraqui | Methods and systems for transferring multimedia content using an existing digital sound transfer protocol |
| CN102045305B (en) * | 2009-10-20 | 2015-06-10 | 中兴通讯股份有限公司 | Method and system for monitoring and tracking multimedia resource transmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0967747A2 (en) * | 1998-06-26 | 1999-12-29 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for receiving a digital transmission, comprising a computer-readable recording medium |
| EP1087584A2 (en) * | 1999-09-15 | 2001-03-28 | Lucent Technologies Inc. | Self-synchronizing convolutional interleaving for multicarrier transmission, particularly for DAB |
-
2003
- 2003-02-12 DE DE2003105657 patent/DE10305657A1/en not_active Withdrawn
-
2004
- 2004-01-08 GB GB0400315A patent/GB2398467B/en not_active Expired - Fee Related
- 2004-02-12 CN CN 200410003975 patent/CN1521966B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0967747A2 (en) * | 1998-06-26 | 1999-12-29 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for receiving a digital transmission, comprising a computer-readable recording medium |
| EP1087584A2 (en) * | 1999-09-15 | 2001-03-28 | Lucent Technologies Inc. | Self-synchronizing convolutional interleaving for multicarrier transmission, particularly for DAB |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1521966A (en) | 2004-08-18 |
| GB2398467B (en) | 2005-04-06 |
| GB0400315D0 (en) | 2004-02-11 |
| GB2398467A (en) | 2004-08-18 |
| DE10305657A1 (en) | 2004-08-26 |
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