WO2005050881A1 - Procede de commande de debit binaire dans un systeme de radiodiffusion numerique; dispositif et procede de conversion du flux de media au moyen dudit procede de commande - Google Patents

Procede de commande de debit binaire dans un systeme de radiodiffusion numerique; dispositif et procede de conversion du flux de media au moyen dudit procede de commande Download PDF

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Publication number
WO2005050881A1
WO2005050881A1 PCT/KR2003/002921 KR0302921W WO2005050881A1 WO 2005050881 A1 WO2005050881 A1 WO 2005050881A1 KR 0302921 W KR0302921 W KR 0302921W WO 2005050881 A1 WO2005050881 A1 WO 2005050881A1
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WO
WIPO (PCT)
Prior art keywords
data amount
data
dab
stream
transmission
Prior art date
Application number
PCT/KR2003/002921
Other languages
English (en)
Inventor
Jin-Hwan Lee
Byung-Jun Bae
Sam-Mo Cho
Geon Kim
Yong-Hoon Lee
Young-Kwon Hahm
Soo-In Lee
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Electronics And Telecommunications Research Institute
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Publication date
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to EP03781080A priority Critical patent/EP1685666A4/fr
Priority to AU2003289587A priority patent/AU2003289587A1/en
Publication of WO2005050881A1 publication Critical patent/WO2005050881A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
    • 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
    • H04H20/95—Arrangements characterised by the broadcast information itself characterised by a specific format, e.g. an encoded audio stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/233—Processing of audio elementary streams
    • H04N21/2335—Processing of audio elementary streams involving reformatting operations of audio signals, e.g. by converting from one coding standard to another
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • 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]
    • 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
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation

Definitions

  • the present invention relates to a digital audio broadcasting technology; and more particularly, a method for controlling a bit rate capable of efficiently converting a moving picture experts group-2 (MPEG-2) stream into a digital audio broadcasting (DAB) data stream for providing multimedia services in a DAB transmission system based on Eureka 147 that is a European DAB system and of efficiently using a data bit amount for every interval of DAB transmission frames and an apparatus for converting a media stream by using the same.
  • MPEG-2 moving picture experts group-2
  • DAB digital audio broadcasting
  • a digital audio broadcasting (DAB) system having an enhanced reception in the mobile state is one contrived approach.
  • DAB digital audio broadcasting
  • a DAB transmission system based on Eureka 147 of a European style has been used mainly for the purpose of digitalizing analogue audio broadcasting so that the DAB transmission system has been originally developed to process audio data or only a small amount of data information.
  • MPEG-2 moving picture experts group-2
  • TV digital television
  • the multimedia data including moving picture data are processed in the MPEG-2 system standard and then, are transmitted by using the DAB transmission system strong in the reception in the mobile state, it is expected to provide much stable multimedia broadcasting services even during the mobile reception state.
  • the DAB transmission system based on the Eureka 147
  • the two systems actually have different interfaces, i.e., the two systems do not have the compatibility; and thus, it is not possible to process the MPEG-2 data in the present DAB transmission system. Accordingly, it is required to develop a method for transmitting a MPEG-2 transmission stream in the DAB transmission system.
  • the second conventional art compresses the multimedia data through the MPEG or the JPEG, makes the multimedia data coded and converts the multimedia data into the DAB data, thereby providing the intended broadcasting services.
  • the second conventional art is similar with the present invention. That is, both of the second conventional art and the present invention transmits the multimedia data by using the DAB transmission system.
  • the present invention is contrasted to the second conventional art more particularly in the point that the present invention can efficiently uses a data bit amount for every interval of the transmission frames.
  • the third conventional art also compresses the multimedia data through the MPEG-4 and then, processes the multimedia data into the MPEG-2 system standard, thereby providing the broadcasting through the DAB system.
  • the third conventional art is similar with the present invention. That is, the multimedia data are transmitted by using the DAB transmission system according to both of the conventional third art and the present invention.
  • the present invention is different from the third conventional art more particularly in this point that the present invention efficiently uses the data bit amount for every interval of the transmission frames.
  • the second and the third conventional arts include a technological idea transmitting the MPEG-2 transmission stream by using the DAB transmission system.
  • the outer coded MPEG-2 data are transmitted by loading a data amount as much as a stream length (STL) value into a stream data field of the DAB transmission frames .
  • STL stream length
  • the data amount according to the STL value in an ensemble transport interface (ETI), which is one of the DAB transmission interface standards, is an 8 byte unit.
  • the data amount becomes the multiple of the 204 bytes.
  • the outer coded data packets are transmitted by being loaded as much as the STL value into the ETI frames for every interval of the ETI frames.
  • a waste of the data bit amount is generated.
  • the multimedia data i.e., the MPEG- 2 data
  • the DAB transmission system it is essentially required to develop a method for performing the outer coding to the multimedia data in a packet unit without wasting the data bit amount; and more particularly, a method for efficiently using the data bit amount by transmitting the outer coded multimedia data with an amount loaded as much as the STL value into the ETI frames for every interval of the ETI frames. Disclosure of the Invention
  • an object of the present invention to provide a method for controlling a bit rate in a digital audio broadcasting (DAB) system by performing an outer coding to an output value of MPEG-2 data in a packet unit without wasting a bit amount and particularly by transmitting the outer coded MPEG-2 transmission stream with a data amount loaded as much as a stream length (STL) value into a DAB transmission frame for every interval of the DAB transmission frames. It is another object of the present invention to provide an apparatus and a method for converting a media stream by using the bit rate controlling method.
  • DAB digital audio broadcasting
  • a media stream conversion apparatus for providing a multimedia service in a digital audio broadcasting (DAB) transmission system, including: a data analyzing means for determining a data amount of an input moving picture transmission stream and calculating a stream length (STL) value indicating a data amount to be loaded into individual DAB transmission frames by using the data amount of the input moving picture transmission stream; a first storing means for storing a data of an effective packet in the moving picture transmission stream; a null packet forming means for forming a null packet to adjust the data amount; a multiplexing means for calculating a data amount to be subjected to an outer coding for every interval of the DAB transmission frames based on the STL value and multiplexing the effective packet and the null packet to output the data as much as the corresponding size; an outer coding means for making an output value of the multiplexing means outer coded in a packet unit to make the output value tolerate to errors during transmission; a second storing means for storing the outer coded
  • a method for controlling a bit rate in a digital audio broadcasting (DAB) transmission system including the steps of: (a) receiving a stream length (STL) value indicating a data amount to be loaded into individual DAB transmission frames; (b) calculating a data amount to be subjected to an outer coding for every interval of the DAB transmission frames based on the STL value; and (c) performing an outer coding to a data with a multiple size of a packet unit for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average.
  • STL stream length
  • a method for converting a media stream for providing a multimedia service in a digital audio broadcasting (DAB) transmission system including the steps of: (a) determining a data amount of an inputted moving picture transmission stream and calculating a stream length (STL) value indicating a data amount to be loaded into individual DAB transmission frames; (b) calculating a data amount to be subjected to an outer coding for every interval of the DAB transmission frames based on the STL value; (c) performing an outer coding to a data with a multiple size of a packet unit for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average; and (d) reading the outer coded moving picture transmission stream as much as the predetermined data amount according to the STL value for every interval of the DAB transmission frames to configure the DAB transmission frames and outputting the moving picture transmission stream.
  • DAB digital audio broadcasting
  • Fig. 1 is a diagram showing an embodied configuration of a media stream conversion apparatus in accordance with the present invention
  • Fig. 2 is a detailed diagram showing an embodied method for controlling a bit rate in accordance with the present invention
  • Fig. 3 is a flowchart showing a method for converting a media stream in accordance with the present invention.
  • Fig. 1 is a diagram showing an embodied configuration of a media stream conversion apparatus in accordance with the present invention.
  • the media stream conversion apparatus for the purpose of providing multimedia services in a DAB transmission system in accordance with the present invention includes a moving picture experts group-2 (MPEG- 2) data analyzing unit 11 for figuring out a data amount of an inputted MPEG-2 transmission stream and calculating a stream length (STL) value indicating a data amount to be loaded into a DAB transmission frame by using the data amount of the inputted MPEG-2 transmission stream, a buffer for MPEG-2 data 12 storing a data of an effective packet in MPEG-2 transmission frames; a null packet forming unit 13 for forming a null packet to adjust the data amount; an MPEG-2 data multiplexing unit 14 for outputting calculating a data amount to be subjected to an outer coding activity for every interval of the DAB transmission frames, i.e., an ensemble transport interface (ETI) frames, based on the STL value and multiplexing the effective packet and the null packet to output a data with the corresponding amount; an outer coding unit 15 for making an output value of the MPEG-2
  • a physical interface such as a society of motion picture and television engineers (SMPTE) 310M or a digital video broadcasting-asynchronous serial interface (DVB-ASI) mainly used for the digital television (TV) broadcasting can be used to input the MPEG-2 transmission stream to the media stream conversion apparatus.
  • the MPEG-2 data analyzing unit 11 receives the MPEG-2 transmission stream and then, calculates the data amount of the effective packet except the null packet in the data inputted to the MPEG-2 data analyzing unit 11. Afterwards, the STL value obtained in an 8 bytes unit of the data amount to be loaded into the DAB transmission frame is figured out by using the data amount of the effective packet, thereby outputting the STL value to the MPEG-2 data multiplexing unit 14 and the transmission frame configuration unit 17.
  • a data of the effective packet is outputted and stored in the buffer for MPEG-2 data 12.
  • the STL value indicating the data amount to be loaded into the DAB transmission frame is inputted to the MPEG-2 data multiplexing unit 14 from the MPEG-2 data analyzing unit 11 or the outside.
  • the data amount with a multiple size of a packet unit is calculated for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average.
  • the data corresponding to the size of the data amount is read from the buffer for MPEG-2 data 12, or the null packet data is read from the null packet forming unit 13. Then, this read data is multiplexed in a packet unit and is transmitted to the outer coding unit 15. That is, if the data is stored in the buffer for MPEG-2 data 12, the MPEG-2 data multiplexing unit 14 reads the data of the effective packet in the buffer for MPEG-2 data 12. If otherwise, the MPEG-2 data multiplexing unit 14 reads the data of the null packet from the null packet forming unit 13.
  • the MPEG-2 data multiplexing unit 14 then multiplexes the effective packet and the null packet and outputs the multiplexed effective packet and the multiplexed null packet to the outer coding unit 15.
  • the data with the multiple size of the packet unit is transmitted to the outer coding unit 15 for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average.
  • the outer coding unit 15 to make the MPEG-2 transmission stream inputted from the MPE ⁇ G-2 '1 multiplexing unit 14 tolerate to the errors during the transmission, the data with the multiple size of the packet unit is subjected to the outer coding and then, transmitted to the buffer for stream data 16 for interval of the DAB transmission frames as maintaining the data amount according to the STL value on average.
  • the MPEG-2 multiplexing unit 14 multiplexes the null packet formed to adjust the data amount with respect to the effective packet of the inputted MPEG-2 transmission stream, i.e., during multiplexing the null packet, the data with the multiple size of the packet unit is outputted for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average, and in the outer coding unit 15, only the data amount according to the STL value is subjected to the outer coding. That is, in the outer coding unit 15, the data with the multiple size of the packet unit is subjected to the outer coding for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average. In the transmission frame configuration unit 17, each field value of the DAB transmission frames is generated and then, outputted. At this time, when configuring the DAB transmission frame, the buffer for stream data 16 reads the 2005/050881
  • FIG. 2 is a detailed diagram showing an embodied method for controlling a bit rate in accordance with the present invention. Especially, Fig. 2 illustrates steps of obtaining a data amount to be subjected to an outer coding for every interval of ETI frames in the DAB transmission system performing the outer coding in 204 bytes and using ETI that is one of the DAB transmission standards. In the outer coding unit 15, this data amount determined through these steps is subjected to the outer coding.
  • the data amount of the buffer for MPEG-2 data 12 is read more than 1,536 bytes, i.e., the data amount corresponding to the STL value in the previous interval of the ETI frames, the data amount of the buffer for MPEG-2 data 12 is reduced by a difference between 1,536 bytes and the value more than 1,536 bytes. If the data amount of the buffer for MPEG-2 data 12 is read less than 1,536 bytes, the data amount of the buffer for MPEG-2 data 12 is increased by a difference between 1,536 bytes and the value less than 1,536 bytes. To prevent the buffer for MPEG-2 data 12 from exceeding, it is necessary to process the predetermined data amount, in this case, 1,536 bytes within the interval of the corresponding ETI frames.
  • the data to be processed within the interval of the corresponding ETI frames to prevent the buffer for MPEG-2 data 12 from exceeding is called a virtual data amount 201.
  • a virtual data amount 201 For instance, if the STL value is 192, a first virtual data amount (201-1) stored in the buffer 12 within a first interval of the ETI frames is 1,536 bytes obtained by multiplying 192 with 8.
  • the second virtual data amount (201-2) is 1,440 bytes obtained by subtracting 96 from 1,536.
  • 1,632 bytes are necessary; and thus, a second MPEG-2 data (202-2) in the second interval of the ETI frames is transmitted with the size of 1,632 bytes to the outer coding unit 15.
  • the third virtual data amount (201-3) is 1,344 bytes obtained by subtracting 96 from 1,440.
  • 1,428 bytes obtained by multiplying 204 with 7 are necessary; and thus, a third MPEG-2 data in the third interval of the ETI frames (202-3) is transmitted with the size of 1,428 bytes to the outer coding unit 15.
  • the MPEG-2 transmission stream can be transmitted to the outer coding unit 15 in the multiple size of the packet unit for every ETI frame as simultaneously maintaining the data amount according to the STL value on average .
  • the MPEG-2 transmission stream with the amount determined by the above described method is transmitted to the outer coding unit 15 for every interval of the DAB transmission frames.
  • the MPEG-2 stream is read in the buffer for MPEG-2 data 12 and transmitted thereafter. If the data is not stored in the buffer for MPEG-2 buffer 12, the null packet is read in the null packet forming unit 13, thereby multiplexing the effective packet and the null packet.
  • Fig. 3 is a flowchart showing a method for converting a media stream in accordance with the present invention.
  • a MPEG-2 transmission stream is first inputted through a physical interface such as a SMPTE 310M or a DVB- ASI mainly used for digital TV broadcasting at step S301. Then, at step S302, a data amount of the MPEG-2 transmission stream is determined in the MPEG-2 data analyzing unit 11.
  • a STL value is obtained in the unit of 8 bytes of a data amount to be loaded into individual DAB transmission frames.
  • a data of an effective packet in the MPEG-2 transmission stream is stored into the buffer for MPEG-2 data 12 at step S304.
  • the data amount is a value calculated by rounding up the actually obtained data amount or adding a smaller number to the actually obtained data amount.
  • the STL value indicating the data amount to be loaded into the individual DAB transmission frames is inputted from the MPEG-2 data analyzing unit 11 or the outside.
  • the MPEG-2 data multiplexing unit 14 reads the data as much as the calculated data amount with the multiple size of the packet unit from the buffer for MPEG-2 data 12 or, a null packet from the null packet forming unit 13. Then, the MPEG-2 data multiplexing unit 14 multiplexes the data with the multiple size of the packet unit.
  • step S306 in the outer coding unit 15, to make the MPEG-2 transmission stream inputted from the MPEG- 2 data multiplexing unit 14 tolerate to errors during the transmission, for every interval of the DAB transmission frames, the data with the multiple size of the packet unit is subjected to the outer coding carried out in the packet unit as maintaining the data amount according to the STL value every interval of the DAB transmission frames, on average .
  • the null packet formed to adjust the data amount with respect to the effective packet of the inputted MPEG-2 transmission stream is multiplexed at step S305.
  • the data with the multiple size of the packet unit is outputted for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average.
  • the data with the multiple size of the packet unit is subjected to the outer coding carried out for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average at step S306.
  • the outer coded MPEG-2 transmission stream is temporarily stored in the buffer for stream data 16 at step S307.
  • each stream data field value of the DAB transmission frames is determined and then, outputted.
  • the outer coded MPEG-2 data is read as much as the data amount corresponding to the STL value from the buffer for stream and as a result, the MPEG-2 data is loaded into a stream data field of the DAB transmission frame at step S308.
  • the present invention as described above makes it possible to transmit the multimedia data processed in the form of the MPEG-2 system standard by using a conventional DAB transmission system, thereby showing an effect of proving multimedia services by using the DAB transmission system. Furthermore, compared with transmitting the multimedia data by using the -digital TV broadcasting system, a method for transmitting the multimedia data by using the DAB transmission system based on Eureka 147 is much tolerated to errors during the transmission.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Systems (AREA)

Abstract

Procédé de commande de débit binaire dans un système de radiodiffusion numérique (DAB), et dispositif et procédé de conversion du flux de média au moyen dudit procédé de commande. Le procédé de conversion du flux de média englobe les opérations suivantes: détermination du volume de données d'un flux de transmission d'images mobiles et calcul d'une valeur de longueur de flux (STL); calcul d'un volume de données devant faire l'objet d'un codage externe pour chaque intervalle entre trames d'émission DAB compte tenu de la valeur STL; codage externe de données avec une taille multiple d'une unité de paquet pour tout intervalle entre trames d'émission DAB de manière à maintenir le volume de données selon la valeur STL en moyenne ; et lecture du flux de transmission d'images mobiles à codage externe à hauteur du volume de données selon la valeur STL pour chaque intervalles entre trames d'émission DAB et émission du train de transmission d'images mobiles.
PCT/KR2003/002921 2003-11-20 2003-12-30 Procede de commande de debit binaire dans un systeme de radiodiffusion numerique; dispositif et procede de conversion du flux de media au moyen dudit procede de commande WO2005050881A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03781080A EP1685666A4 (fr) 2003-11-20 2003-12-30 Procede de commande de debit binaire dans un systeme de radiodiffusion numerique; dispositif et procede de conversion du flux de media au moyen dudit procede de commande
AU2003289587A AU2003289587A1 (en) 2003-11-20 2003-12-30 Method for controlling bit rate in digital audio broadcasting system and apparatus and method for converting media stream by using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0082710 2003-11-20
KR20030082710A KR100527846B1 (ko) 2003-11-20 2003-11-20 디지털 오디오 방송 전송 시스템에서 비트율 제어 방법 및그를이용한 미디어 스트림 변환 장치 및 그 방법

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WO2005050881A1 true WO2005050881A1 (fr) 2005-06-02

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WO2009079320A2 (fr) * 2007-12-18 2009-06-25 Ibiquity Digital Corporation Procédé de diffusion en continu au moyen d'un service de données sur un sous-système de liaison radio

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CN101511007B (zh) * 2009-03-25 2011-02-02 杭州华三通信技术有限公司 一种网络视频监控系统中的录像实现方法、设备和系统

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AU2003289587A1 (en) 2005-06-08
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CN1879332A (zh) 2006-12-13
EP1685666A1 (fr) 2006-08-02
KR100527846B1 (ko) 2005-11-15

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