WO1998032284A1 - Perfectionnements relatifs a la commutation entre trains binaires comprimes - Google Patents

Perfectionnements relatifs a la commutation entre trains binaires comprimes Download PDF

Info

Publication number
WO1998032284A1
WO1998032284A1 PCT/GB1997/003547 GB9703547W WO9832284A1 WO 1998032284 A1 WO1998032284 A1 WO 1998032284A1 GB 9703547 W GB9703547 W GB 9703547W WO 9832284 A1 WO9832284 A1 WO 9832284A1
Authority
WO
WIPO (PCT)
Prior art keywords
bitstream
decoder
buffer
information
switching
Prior art date
Application number
PCT/GB1997/003547
Other languages
English (en)
Inventor
Alois Martin Bock
Nigel Stephen Dallard
Original Assignee
Nds Limited
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 Nds Limited filed Critical Nds Limited
Priority to EP97950333A priority Critical patent/EP0951779A1/fr
Priority to AU53331/98A priority patent/AU5333198A/en
Publication of WO1998032284A1 publication Critical patent/WO1998032284A1/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]
    • H04N21/20—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
    • H04N21/23406—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving management of server-side video buffer
    • 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
    • H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
    • 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
    • H04N21/23605—Creation or processing of packetized elementary streams [PES]
    • 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]
    • H04N21/40—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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4343—Extraction or processing of packetized elementary streams [PES]
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4344—Remultiplexing of multiplex streams, e.g. by 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]
    • H04N21/40—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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip
    • 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
    • H04N21/26603—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 for automatically generating descriptors from content, e.g. when it is not made available by its provider, using content analysis techniques

Definitions

  • This invention relates to improvements relating to switching between
  • data for transmission may undergo compression to reduce
  • An MPEG transmission system allows several video, audio and
  • the information to be transmitted is compressed into a
  • video signals makes use of the spatial and temporal redundancy, i.e.
  • one object of the present invention is to provide a
  • method comprising: stopping the decoder from carrying out the decoding
  • bitstream thereby switching from the first bitstream to the second bitstream.
  • This invention allows insertion of additional programs, advertisements
  • packet headers in MPEG-2 indicate the start of packets of elementary
  • the invention also allows for simple insertion of additional
  • bitstream such that the buffer is substantially emptied
  • Figure 1 is a timing diagram of the switching process according to one
  • FIG. 2 is a block diagram of the proposed switching circuit for
  • the decoder buffers are flushed and decoding re-starts on the new channel.
  • Figure 1 shows a timing diagram of the switching process.
  • PES packet 1a remains switched to the output until the start of the next PES packet 1 b. At this point the switching sequence starts by inserting
  • the guard interval is calculated as the time it takes to empty the guard interval
  • receiver buffer i.e.
  • bitstream After the guard interval the bitstream remains switched off until the arrival of
  • Figure 2 shows a block diagram of an example implementation of the
  • Part of a decoder or receiver 20 is shown, in which a
  • decoder buffer 22 is represented. It is assumed that switching should occur
  • the two streams are aligned using a FIFO 28 in one of the two input paths 30,
  • transport-packet-identification PID
  • headers are unencrypted, even if the payload is encrypted, so this information
  • the control circuit also receives the switching request, for
  • control circuit goes through the sequence of events as shown in
  • PSI Program Specific Information
  • PID transport-packet-identification
  • transport stream 26 is encrypted, it is necessary to deliver the
  • ECMs Entitlement Control Messages
  • sequence-end-code inserter are unencrypted, and the transport-scrambling-
  • audio frames may not be aligned with transport
  • stream layer e.g. at PES packet boundaries as is the case in video, there is a
  • the decoder is forced to stop the decoding process
  • MPEG-2 adaptation fields may be used.
  • the MPEG-2 adaptation fields may be used. In this case the
  • audio bitstream is interrupted exactly at the end of an audio frame. The rest of
  • the invention provides a clean manner by which information or

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

Cette invention se rapporte, selon un premier aspect, à un procédé permettant de passer d'un premier train binaire à un second train binaire, dans un système comportant un décodeur doté d'un tampon à travers lequel le train binaire est transmis. Ledit procédé consiste à arrêter le décodeur dans son processus de décodage, de manière préétablie et en un point préétabli du train binaire, de sorte que le tampon se trouve sensiblement vidé; et à relancer le décodeur, de manière commandée, en un point préétabli du second train binaire, ce qui permet de passer du premier train binaire au second train binaire. Cette invention permet d'insérer des émissions supplémentaires ou des annonces publicitaires ou analogues dans un train de données comprimées suivant la norme MPEG sans rencontrer aucun des problèmes associés à l'utilisation des astuces fournies dans MPEG-2. Un des avantages du procédé proposé réside dans sa simplicité. En termes de norme MPEG-2, l'intervention n'est pratiquement nécessaire qu'au niveau de la couche transport. Les en-têtes de paquets de transport dans MPEG-2 indiquent le début des paquets des trains élémentaires (paquets PES). Cet indicateur sert au contrôle de tous les événements du processus de commutation. Cette invention se rapporte également à l'insertion simple d'informations supplémentaires dans d'autres types de trains binaires.
PCT/GB1997/003547 1997-01-17 1997-12-24 Perfectionnements relatifs a la commutation entre trains binaires comprimes WO1998032284A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97950333A EP0951779A1 (fr) 1997-01-17 1997-12-24 Perfectionnements relatifs a la commutation entre trains binaires comprimes
AU53331/98A AU5333198A (en) 1997-01-17 1997-12-24 Improvements in or relating to switching between compressed bitstreams

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9700956A GB9700956D0 (en) 1997-01-17 1997-01-17 Improvements in or relating to switching between compressed bitstreams
GB9700956.7 1997-01-17

Publications (1)

Publication Number Publication Date
WO1998032284A1 true WO1998032284A1 (fr) 1998-07-23

Family

ID=10806164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/003547 WO1998032284A1 (fr) 1997-01-17 1997-12-24 Perfectionnements relatifs a la commutation entre trains binaires comprimes

Country Status (4)

Country Link
EP (1) EP0951779A1 (fr)
AU (1) AU5333198A (fr)
GB (1) GB9700956D0 (fr)
WO (1) WO1998032284A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037467A1 (fr) * 1999-03-08 2000-09-20 Tandberg Television ASA Commutation de signaux numériques en temps réel sans impulsions de bruit
GB2349289A (en) * 1998-09-16 2000-10-25 Actv Inc Door handle with interchangeable graphic display
GB2353430A (en) * 1999-06-17 2001-02-21 Actv Inc Seamless switching between two video signals
EP1148727A1 (fr) * 2000-04-05 2001-10-24 THOMSON multimedia Méthode et appareil pour décoder un signal vidéo numérique dans un système de vidéo numérique avec insertion d'entêtes factices
EP1148729A1 (fr) * 2000-04-05 2001-10-24 THOMSON multimedia Méthode et appareil pour décoder un signal vidéo numérique dans un système de vidéo numérique avec insertion d'entêtes factices
EP1304883A2 (fr) * 2001-10-22 2003-04-23 Matsushita Electric Industrial Co., Ltd. Sélection de flux de données
EP1631077A2 (fr) * 2004-08-27 2006-03-01 Samsung Electronics Co., Ltd. Récepteur numérique de télévision et son procédé
EP1722573A2 (fr) 2005-05-09 2006-11-15 LG Electronics Inc. Terminal de réception d'emissions diffusées et méthode de décodage d'un flux de données numériques
EP1890487A1 (fr) * 2006-08-16 2008-02-20 Samsung Electronics Co., Ltd. Procédé de changement de canal et appareil d'affichage d'images l'utilisant
WO2009133427A1 (fr) * 2008-04-28 2009-11-05 Nds Limited Commutation précise de trame
US8843990B1 (en) * 2002-04-25 2014-09-23 Visible World, Inc. System and method for optimized channel switching in digital television broadcasting
EP1757095B1 (fr) * 2004-06-18 2015-08-12 NDS Limited Systeme de jonction

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5477263A (en) * 1994-05-26 1995-12-19 Bell Atlantic Network Services, Inc. Method and apparatus for video on demand with fast forward, reverse and channel pause
EP0692911A2 (fr) * 1994-07-15 1996-01-17 Matsushita Electric Industrial Co., Ltd. Procédé d'assemblage d'images codées MPEG
GB2293076A (en) * 1994-07-29 1996-03-13 Discovision Ass Video decoding and time synchronisation
EP0708566A2 (fr) * 1994-10-21 1996-04-24 AT&T Corp. Méthode pour contrÔler la mémoire tampon d'un codeur de données vidéo
WO1996017490A2 (fr) * 1994-12-02 1996-06-06 Philips Electronics N.V. Gestion d'ecart de synchronisation audio/video
WO1996017491A2 (fr) * 1994-12-02 1996-06-06 Philips Electronics N.V. Gestion de tampon de montage video

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5477263A (en) * 1994-05-26 1995-12-19 Bell Atlantic Network Services, Inc. Method and apparatus for video on demand with fast forward, reverse and channel pause
EP0692911A2 (fr) * 1994-07-15 1996-01-17 Matsushita Electric Industrial Co., Ltd. Procédé d'assemblage d'images codées MPEG
GB2293076A (en) * 1994-07-29 1996-03-13 Discovision Ass Video decoding and time synchronisation
EP0708566A2 (fr) * 1994-10-21 1996-04-24 AT&T Corp. Méthode pour contrÔler la mémoire tampon d'un codeur de données vidéo
WO1996017490A2 (fr) * 1994-12-02 1996-06-06 Philips Electronics N.V. Gestion d'ecart de synchronisation audio/video
WO1996017491A2 (fr) * 1994-12-02 1996-06-06 Philips Electronics N.V. Gestion de tampon de montage video

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WEISS S M: "SWITCHING FACILITIES IN MPEG-2: NECESSARY BUT NOT SUFFICIENT", SMPTE JOURNAL, vol. 104, no. 12, 1 December 1995 (1995-12-01), pages 788 - 802, XP000543847 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2349289A (en) * 1998-09-16 2000-10-25 Actv Inc Door handle with interchangeable graphic display
GB2349289B (en) * 1998-09-16 2001-09-12 Actv Inc Method and apparatus for performing a seamless switch between two digital video signals
EP1037467A1 (fr) * 1999-03-08 2000-09-20 Tandberg Television ASA Commutation de signaux numériques en temps réel sans impulsions de bruit
GB2353430B (en) * 1999-06-17 2003-10-29 Actv Inc The storage of interactive video programming
GB2353430A (en) * 1999-06-17 2001-02-21 Actv Inc Seamless switching between two video signals
US6823131B2 (en) 2000-04-05 2004-11-23 Thomson Licensing S.A. Method and device for decoding a digital video stream in a digital video system using dummy header insertion
EP1148729A1 (fr) * 2000-04-05 2001-10-24 THOMSON multimedia Méthode et appareil pour décoder un signal vidéo numérique dans un système de vidéo numérique avec insertion d'entêtes factices
EP1148727A1 (fr) * 2000-04-05 2001-10-24 THOMSON multimedia Méthode et appareil pour décoder un signal vidéo numérique dans un système de vidéo numérique avec insertion d'entêtes factices
EP1304883A2 (fr) * 2001-10-22 2003-04-23 Matsushita Electric Industrial Co., Ltd. Sélection de flux de données
EP1304883A3 (fr) * 2001-10-22 2009-09-30 Panasonic Corporation Sélection de flux de données
US8843990B1 (en) * 2002-04-25 2014-09-23 Visible World, Inc. System and method for optimized channel switching in digital television broadcasting
US10542313B2 (en) * 2002-04-25 2020-01-21 Visible World, Llc System and method for optimized channel switching in digital television broadcasting
US20150189374A1 (en) * 2002-04-25 2015-07-02 Visible World Inc. System and method for optimized channel switching in digital television broadcasting
EP1757095B1 (fr) * 2004-06-18 2015-08-12 NDS Limited Systeme de jonction
EP1631077A2 (fr) * 2004-08-27 2006-03-01 Samsung Electronics Co., Ltd. Récepteur numérique de télévision et son procédé
EP1631077A3 (fr) * 2004-08-27 2006-06-07 Samsung Electronics Co., Ltd. Récepteur numérique de télévision et son procédé
EP1722573A2 (fr) 2005-05-09 2006-11-15 LG Electronics Inc. Terminal de réception d'emissions diffusées et méthode de décodage d'un flux de données numériques
EP1890487A1 (fr) * 2006-08-16 2008-02-20 Samsung Electronics Co., Ltd. Procédé de changement de canal et appareil d'affichage d'images l'utilisant
WO2009133427A1 (fr) * 2008-04-28 2009-11-05 Nds Limited Commutation précise de trame

Also Published As

Publication number Publication date
EP0951779A1 (fr) 1999-10-27
AU5333198A (en) 1998-08-07
GB9700956D0 (en) 1997-03-05

Similar Documents

Publication Publication Date Title
US7490344B2 (en) System and method for seamless switching
KR100950867B1 (ko) 패킷화된 비디오 데이터 처리 방법, 이미지 데이터를 디코딩하는 방법, 및 비디오 방송 방법
KR101350754B1 (ko) 채널 변경 시간을 감소시키고 채널 변경 동안 오디오/비디오 콘텐츠를 동기화하는 방법
US5650825A (en) Method and apparatus for sending private data instead of stuffing bits in an MPEG bit stream
WO2005043784A1 (fr) Dispositif et procede de reception d'ondes de diffusion dans lesquelles sont multiplexes plusieurs services
US20020064177A1 (en) Method and apparatus for forming and utilizing a slotted mpeg transport stream
CN102349307A (zh) 拼接系统
JP2011139501A (ja) チャンネル間変更の高速化
EP2545708B1 (fr) Procédé et système permettant d'inhiber un retard de synchronisation audio-vidéo
US20170048564A1 (en) Digital media splicing system and method
EP2485501A1 (fr) Solution de flux compagnon de changement rapide de canal avec optimisation de bande passante
EP0951779A1 (fr) Perfectionnements relatifs a la commutation entre trains binaires comprimes
EP1182887A2 (fr) Dispositif et méthode de décodage multiple
JP2001517040A (ja) 圧縮ビデオプログラムのシームレススプライシング
US20090013369A1 (en) Device and Method for Initializing Decoder in Digital Broadcasting Receiver
JP2002051325A (ja) デジタル放送映像受信装置およびデジタル放送映像受信方法
US20090251616A1 (en) Apparatus and method for processing data in digital broadcasting receiver
US6731657B1 (en) Multiformat transport stream demultiplexor
CN114189737B (zh) 一种数字电视快速切台方法及数字电视
US10757473B2 (en) Digital media splicing system and method
JPH10190617A (ja) 映像信号復号化装置
US20090007201A1 (en) Jitter Introduction In A Data Transmission System
Birch MPEG splicing and bandwidth management
US20070116041A1 (en) Digital broadcast receiver
JP2000278230A (ja) ディジタル信号多重装置およびディジタル信号受信装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 09341034

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1997950333

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1997950333

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1997950333

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998533907

Format of ref document f/p: F