WO2007060577A1 - Procede et appareil de telechargement dans un systeme de diffusion numerique - Google Patents

Procede et appareil de telechargement dans un systeme de diffusion numerique Download PDF

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Publication number
WO2007060577A1
WO2007060577A1 PCT/IB2006/054261 IB2006054261W WO2007060577A1 WO 2007060577 A1 WO2007060577 A1 WO 2007060577A1 IB 2006054261 W IB2006054261 W IB 2006054261W WO 2007060577 A1 WO2007060577 A1 WO 2007060577A1
Authority
WO
WIPO (PCT)
Prior art keywords
bandwidth
program stream
download
stream
downloadable file
Prior art date
Application number
PCT/IB2006/054261
Other languages
English (en)
Inventor
Kairaz Contractor
Fang Liu
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2007060577A1 publication Critical patent/WO2007060577A1/fr

Links

Classifications

    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • 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
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • 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
    • 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
    • H04N21/23—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
    • H04N21/23614—Multiplexing of additional data and video streams
    • 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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • 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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • 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
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation

Definitions

  • the invention relates to a digital broadcasting technology, in particular, to a method and an apparatus providing download service in digital broadcasting system.
  • the simple mobile voice communication could not meet the requirement of the need for information due to the prevailing of mobile communication.
  • the perspectives of various new applications which could provide much more contents that are convenient in handling business/entertainment and provides more information, are promising.
  • one of the applications is watching TV program on the mobile terminals.
  • the service of providing TV program on mobile terminal could bring in huge potential profit.
  • the application could be further extended to provide large file downloading for multiple terminal users, and the file downloading is not only limited to TV video stream but also could be other contents such as real-time game, software patch etc.
  • DVB-H Digital Video Broadcasting-Handheld
  • DVB-H Digital Video Broadcasting-Terrestrial
  • the software download service is one of its essential features, and one of standardized applications as well.
  • the "Digital Video Broadcasting (DVB); DVB Data Download Specification; Part 1: Simple Profile” in the file of ETSI TR 102006-1 Vl.1.1 and “Digital Video Broadcasting (DVB); Specification for System Update in DVB Systems" in the file of ETSI TR 102006-1 Vl.2.1 could be referred to for more detailed explanation.
  • One of the main purposes of providing software download service in DVB system is to fix the bugs in the system software and to update the user's device in order to make the device containing new functions.
  • download software in DVB system over-the-air (OTA) is that basic apparatus in a existing network could be fully utilized, without adding any other peripheral devices.
  • Fig.l illustrates the basic structure of TS (Transport Stream) in a conventional DVB system.
  • the TS contains a plurality of different PS (Program Stream), and each PS further includes video stream, audio stream and private stream.
  • the diameter of the cylinders in Fig. 1 represents various streams and indicates the bandwidth each occupies.
  • the software data module provided to terminal users are arranged in certain sequence, and then are sent through private stream sequentially.
  • the conventional software download method of DVB system has a lot of disadvantages.
  • the bandwidth allocated by the system is very limited and the private stream only occupies a small portion of whole bandwidth, as shown in Fig.l.
  • the software downloading process is very slow and takes a lot of time. Since the software for downloading are sequentially transmitted, it could take a long time for the terminal users to wait for beginning to transmit the software he wanted. For those handheld devices using battery as power source, it is extremely difficult to wait such a long time to download software due to the limit of the battery.
  • the downloaded software is stored in a RAM (Random Access Memory) of the receiving device. Thus, if the receiving device is switched off because out of power or other interruptions, the whole software should be re-downloaded; or if the receiving device is switched off before transmitting the software, the user may miss the downloading of software.
  • One object of the invention is to provide a download method and apparatus used in digital broadcast system.
  • the method and apparatus could bring efficient download service to the user by making full use of the bandwidth resources of the system.
  • the download method used in digital broadcast system according to the invention including the steps:
  • the download apparatus used in digital broadcast system comprises: a bandwidth allocator, which estimates the bandwidth available for downloading in the system transport stream; and a controller, which assigns a program stream for a downloadable file by use of the available bandwidth acquired by the bandwidth allocator, in order to transmit said downloadable file in the assigned program stream.
  • the download method and apparatus used in digital broadcast system provide download service through dedicated program stream, which not only increases download speed but also utilize the system bandwidth resources more efficiently.
  • the bandwidth for transmitting the downloadable files is increased and those downloaded files do not need to be multiplexed and broadcasted in carousel, the users' waiting time could be reduced.
  • Fig.1 shows a conventional structure of DVB system transport stream
  • Fig.2 shows a structure of DVB-H system transport stream of the present invention
  • Fig.3 shows the block diagram of a broadcast apparatus of DVB-H system for providing download service in the present invention
  • Fig.4 partially shows of signalling structure of DVB-H system for providing download service in the present invention.
  • Transport Stream In a digital broadcasting system, Transport Stream (TS) is constructed by a plurality of different Program Streams (PSs). The bandwidth of each PS is allocated according to the corresponding parameters in broadcasting system. Those parameters are generally determined according to the service provided by the broadcasting system.
  • PSs Program Streams
  • the receiving terminals are mainly handheld devices. Because of the limits imposed on the hardware of those handheld devices, such as small display panel and lower resolution etc., when compared with the video stream in the DVB-T system, the video stream broadcasted in DVB-H system does not need high speed and high resolution. Therefore, in the DVB-H system, the bandwidth allocated to each PS could be adjusted to be relatively small, such that the utilization of system resource could be more flexible.
  • a TS-PS system structure scheme according to the present invention can provide a quick download service while providing multimedia broadcasting service by use of system resource more efficiently.
  • DVB-H system as an example to explain in detail.
  • the first type is standard PS, which is the same with conventional PS, for transmitting video or audio digital multimedia contents
  • the second type PS is extended PS, mainly for transmitting downloadable objects (i.e. for software download service etc.).
  • a standard PS includes video and audio contents and an extended PS includes a plurality of different downloadable objects for user's downloading.
  • the downloadable objects could be software program, a module of a software program or data for executing certain program etc.
  • multi-path of downloadable data could be transmitted in one extended PS simultaneously, and the download rate and resources for each path of downloadable data could be individually adjusted. The operator could make this adjustment according to the fee paid by the user or the size of the downloadable data, in order to utilize the limited bandwidth more efficiently.
  • each downloadable object could be further divided into a plurality of small data blocks in order to increase downloading efficiency. If some data blocks have download errors during the download procedure, only the data block with errors needs to be re-downloaded rather than trying to download the complete downloadable object again.
  • the extended PS could be temporarily employed and be dynamically adjusted. That is, if the download service is requested, the system could establish a new PS in TS as an extended PS dedicated to transmit downloadable data, or the system could assign an idle standard PS in TS as extended PS for providing download service temporarily.
  • the bandwidth for the extended PS is dynamically allocated, if a huge amount of data files need to be transmitted in a certain time interval, the system may allocate a larger bandwidth for the extended PS in order to provide a download service with higher rate.
  • the system could take back the bandwidth allocated to the extended PS. Since the video stream for broadcasting in DVB-H system could achieve desirable visual effect without high rate and high resolution, even if the bandwidth of TS are completely occupied by standard PS, the bandwidth occupied by standard PS could be somewhat reduced in order to get some available bandwidth which could be allocated to extended PS temporarily.
  • a broadcasting device of the present invention includes a downloading management unit 10, a bandwidth allocating unit 20 and an extended PS control unit 30.
  • the downloading management unit 10 could receive download service information, such as downloadable contents or downloading instructions, from the system, and send corresponding instructions to bandwidth allocating unit 20 and extended PS control unit 30 depending on whether a download service or a downloadable content currently exists.
  • the bandwidth allocating unit 20 allocates bandwidth to extended PS depending on the current bandwidth information of the system and the instruction from the downloading management unit 10.
  • the extended PS control unit 30 establishes a new extended PS or assigns an idle standard PS as extended PS temporarily in order to transmit the content of download service, depending on the instruction from the downloading management unit 10 and the bandwidth acquired from bandwidth allocating unit 20. If the current available bandwidth is not sufficient, the bandwidth allocating unit 20 could also get more available bandwidth for allocating to the extended PS temporarily by adjusting the bandwidth of standard PS.
  • the service information mainly comprises service Bouquet Association Table (BAT), Network Information Table (NIT) and Program Map Table (PMT) etc.
  • BAT service Bouquet Association Table
  • NIT Network Information Table
  • PMT Program Map Table
  • the download service will be executed through an assigned extended PS in the TS if the system requests this service.
  • the software download service will be marked by specific parameters of a PS Descriptor.
  • the specific parameter could be PMT.
  • the PMT will be the same as basic PMT in conventional DVB-H system.
  • the PMT will be different from conventional PMT only if the PS is used for data service such as software downloading etc. In this way, the compatibility of the invention over general multimedia broadcasting could be ensured.
  • the receiving terminal first acquires NIT or BAT, then finds corresponding PMT according to the information in NIT or BAT.
  • the PMT describes the structure of PS. In general, there are two types of data stream, one is ordinary video stream, the other one is service stream, which includes contents such as software/game downloading etc.
  • the PMT also includes Object Download Information (ODI) structure, which describes the features of complete module download. If the downloadable module is divided into multiple data blocks for transmitting, Object Block Information (OBI) will be used for describing the features of the data blocks.
  • ODDI Object Download Information
  • UNT User Notification Table
  • download rate is increased by providing download service through dedicated PS.
  • the bandwidth for transmitting downloadable files is increased, these downloadable files do not need to be multiplexed and broadcasted in turn.
  • the downloading period and the waiting time are therefore reduced, and the system bandwidth resources are utilized more effectively without influencing the multimedia content broadcasting.
  • the method and apparatus of the present invention could be not only used in DVB-H system but also used in other similar broadcast or communication systems, such as Digital Multimedia Broadcast-Handheld (DMB-H) systems etc. It will be appreciated by those skilled in the art, the method and apparatus for download in digital broadcasting systems could be modified without departing from the scope of the invention. Therefore, the scope of protection of the invention should be defined by the content of appended claims.
  • DMB-H Digital Multimedia Broadcast-Handheld

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention concerne un procédé et un appareil permettant de télécharger dans un système de diffusion numérique. Le procédé consiste d'abord à évaluer une bande passante disponible dans un flux de transport du système de diffusion numérique, puis à attribuer un flux de programme pour un fichier téléchargeable au moyen de la bande passante disponible et finalement à transmettre le fichier téléchargeable dans le flux de programme attribué. La transmission du fichier téléchargeable dans un flux de programme spécifique permet non seulement d'augmenter la vitesse de téléchargement d'un dispositif terminal, mais également d'exploiter efficacement les ressources du système.
PCT/IB2006/054261 2005-11-22 2006-11-15 Procede et appareil de telechargement dans un systeme de diffusion numerique WO2007060577A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510128613.4 2005-11-22
CN200510128613 2005-11-22

Publications (1)

Publication Number Publication Date
WO2007060577A1 true WO2007060577A1 (fr) 2007-05-31

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PCT/IB2006/054261 WO2007060577A1 (fr) 2005-11-22 2006-11-15 Procede et appareil de telechargement dans un systeme de diffusion numerique

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8291446B2 (en) * 2008-01-31 2012-10-16 Echostar Technologies L.L.C. Systems and methods for providing content based upon consumer preferences
US8386121B1 (en) 2009-09-30 2013-02-26 The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Optimized tuner selection for engine performance estimation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019560A1 (fr) * 1995-11-21 1997-05-29 Imedia Corporation Procede et dispositif pour multiplexer et distribuer des donnees avec video en temps reel preformatee
WO1998013962A1 (fr) * 1996-09-25 1998-04-02 Thomson Multimedia S.A. Methode et appareil d'attribution dynamique de largeurs de bande dans un codeur de trains de paquets
US20020144260A1 (en) * 2001-03-29 2002-10-03 Koninklijke Philips Electronics N.V. Method for adaptive data/content insertion in MPEG2 transport stream
EP1326355A2 (fr) * 2002-01-03 2003-07-09 Hughes Electronics Corporation Utilisation de paquets vides dans des systèmes de télévision numérique à paquets
US20040013136A1 (en) * 2002-07-19 2004-01-22 Mailhot John Norman Systems and methods for providing on-demand datacasting
US20040090996A1 (en) * 2002-11-13 2004-05-13 General Instrument Corporation Methods and apparatus for statistical multiplexing with distributed multiplexers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019560A1 (fr) * 1995-11-21 1997-05-29 Imedia Corporation Procede et dispositif pour multiplexer et distribuer des donnees avec video en temps reel preformatee
WO1998013962A1 (fr) * 1996-09-25 1998-04-02 Thomson Multimedia S.A. Methode et appareil d'attribution dynamique de largeurs de bande dans un codeur de trains de paquets
US20020144260A1 (en) * 2001-03-29 2002-10-03 Koninklijke Philips Electronics N.V. Method for adaptive data/content insertion in MPEG2 transport stream
EP1326355A2 (fr) * 2002-01-03 2003-07-09 Hughes Electronics Corporation Utilisation de paquets vides dans des systèmes de télévision numérique à paquets
US20040013136A1 (en) * 2002-07-19 2004-01-22 Mailhot John Norman Systems and methods for providing on-demand datacasting
US20040090996A1 (en) * 2002-11-13 2004-05-13 General Instrument Corporation Methods and apparatus for statistical multiplexing with distributed multiplexers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8291446B2 (en) * 2008-01-31 2012-10-16 Echostar Technologies L.L.C. Systems and methods for providing content based upon consumer preferences
US8386121B1 (en) 2009-09-30 2013-02-26 The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Optimized tuner selection for engine performance estimation

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