WO2013144583A1 - Réception de contenu audio/vidéo - Google Patents

Réception de contenu audio/vidéo Download PDF

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Publication number
WO2013144583A1
WO2013144583A1 PCT/GB2013/050727 GB2013050727W WO2013144583A1 WO 2013144583 A1 WO2013144583 A1 WO 2013144583A1 GB 2013050727 W GB2013050727 W GB 2013050727W WO 2013144583 A1 WO2013144583 A1 WO 2013144583A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
packet
video
audio
data stream
Prior art date
Application number
PCT/GB2013/050727
Other languages
English (en)
Inventor
Sri Gopikanth GUTTA
Kohei Yamamoto
Masahiko Sato
Original Assignee
Sony Corporation
Sony Europe 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 Sony Corporation, Sony Europe Limited filed Critical Sony Corporation
Publication of WO2013144583A1 publication Critical patent/WO2013144583A1/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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43607—Interfacing a plurality of external cards, e.g. through a DVB Common Interface [DVB-CI]
    • 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
    • H04N21/2365—Multiplexing of several 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
    • H04N21/236—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
    • H04N21/2368—Multiplexing of audio 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
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • 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
    • H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • 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
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • 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
    • H04N21/434—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
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG 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]
    • H04N21/40—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
    • H04N21/4347—Demultiplexing of several 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]
    • H04N21/40—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
    • H04N21/4348—Demultiplexing 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]
    • H04N21/40—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
    • H04N21/4405—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 stream decryption

Definitions

  • Figure 1 is a schematic diagram of a host device with a CAM and a smart card
  • FIG. 6a schematically illustrates a so-called M card
  • Figure 10 schematically illustrates TS packets of two services
  • ECMs and EMMs themselves are well known message types in MPEG television distribution systems.
  • the format of their payloads can be specific to the CA system in use, with the differences between formats often being semantic rather than having technical significance.
  • the ECM and EMM data are carried in a packetized data stream as data packets defining decryption information and are used in the decoding process to decode an audio/video programme from the packetized data stream.
  • the head end 60 comprises a CA encryptor 61 , a key generator 62, an entitlement control unit 63 and a multiplexer and modulator 64.
  • the CICAM 30 comprises a CA decryptor 31 , a CA key generator 32, a CC encryptor 33 and a CC key generator 34.
  • the CICAM 30 When the CICAM 30 is first associated with the host device 10, the CICAM 30 initiates an authentication process with the host device 10. In this process, each device verifies the other's certificate, and the DH key exchange process takes place so as to securely share keys between the two devices.
  • the CICAM first requests that the host device provides its certificate data. The CICAM verifies the signature on the host device's certificate. The same process is then carried out by the host requesting and verifying the CICAM's certificate. The CICAM and the host then each demonstrate that they possess the private key corresponding to the public key in the certificate by signing a DH public key and sending it to the other device for validation. The CICAM then obtains and verifies an authentication key AKH from the host.
  • a potential problem with this type of arrangement is that the CAMs 1 14 may not be able to handle such a high data rate packetized data signal.
  • One potential reason is that the CAMs may be designed for compatible use in respect of just a single packetized data signal.
  • the CPU 132 detects whether the secondary tuner (TS) is in use, for example to record a programme service for later viewing. If the secondary tuner is not in use, then at a step 364 the CPU 132 or the CI controller communicates the availability of the secondary tuner to the set of CAMs 114, in response to which one of the set may elect to use the secondary tuner for non-viewing reception of non-viewing information at a step 366. In other words, if the tuner is not currently in use in respect of providing a programme for decoding, it is considered available for the purpose of accessing (for example, tuning to) a channel carrying non-viewing information.
  • TS secondary tuner
  • FIG. 25 illustrates an arrangement by which a host multiplexes two TSs together using a multiplexer 600 (similar in function to the multiplexer 140 described above) and passes the multiplexed data, over the common interface, to an M card CICAM 610.
  • a multiplexer 600 similar in function to the multiplexer 140 described above
  • M card CICAM 610 M card CICAM 610.
  • more than two TSs may be multiplexed and handled in this way, but the diagram shows only two for the sake of clarity. It is assumed here that the two multiplexed TSs are encrypted using different respective CA systems, CA-A and CA-B.
  • next packet P3 will incorrectly be associated with the next sequence number N2 and the time t2.
  • the subsequent packet P4 will be incorrectly associated with the sequence number N3 and the time t3, and so on. This means that the times of each packet will be incorrect, which in turn can lead to the type of timing conflicts described above with reference to Figure 17.
  • the step of storing timing data comprises: allocating (in the case of the sequence number, for example) or detecting (in the case of a PI D or a continuity counter, for example) a packet reference indicator in respect of each audio/video packet included in the composite packetized data stream; and storing timing data (for example, in the table of Figure 19) for a packet according to that packet's packet reference indicator.
  • a tuner arrangement capable of concurrently tuning to two or more transmission channels

Landscapes

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

Abstract

Les étapes du procédé selon l'invention de fonctionnement d'un récepteur de contenu audio/vidéo ayant un décodeur de contenu capable de décoder concurremment deux programmes audio/vidéo ou plus à partir d'un seul flux de données en paquets de paquets de données audio/vidéo codées consistent: à recevoir du contenu audio/vidéo codé sous la forme de deux flux de données en paquets ou plus, chaque flux de données ayant un ou plusieurs programmes ayant des paquets de données audio/vidéo codés respectifs; à générer un flux de données en paquets composite ayant des données de programme provenant de deux des flux de données en paquets ou plus en sélectionnant un sous-ensemble de paquets de données à partir des deux flux de données en paquets ou plus reçus, le sous-ensemble comprenant ces paquets de données audio/vidéo associés à ces programmes à décoder; à mémoriser les données de temporisation indiquant au moins un instant d'arrivée de ces paquets de données audio/vidéo incluses dans le flux de données en paquets composite; et à décoder et sortir les données du programme audio/vidéo du flux de données en paquets composite en fonction des informations de temporisation mémorisées concernant chaque paquet audio/vidéo décodé.
PCT/GB2013/050727 2012-03-26 2013-03-20 Réception de contenu audio/vidéo WO2013144583A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB201205299A GB2500616A (en) 2012-03-26 2012-03-26 Concurrent decoding of a composite packetized audio-video data stream according to packet arrival times
GB1205299.9 2012-03-26
GB1212406.1 2012-07-12
GB201212406A GB2500734A (en) 2012-03-26 2012-07-12 Generating and coding a composite packetized audio/video (AV) data stream, including arrival timing data

Publications (1)

Publication Number Publication Date
WO2013144583A1 true WO2013144583A1 (fr) 2013-10-03

Family

ID=46087140

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2013/050727 WO2013144583A1 (fr) 2012-03-26 2013-03-20 Réception de contenu audio/vidéo

Country Status (3)

Country Link
GB (2) GB2500616A (fr)
TW (1) TW201401853A (fr)
WO (1) WO2013144583A1 (fr)

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WO2002041625A1 (fr) * 2000-11-17 2002-05-23 Scm Microsystems Gmbh Procedes d'acces conditionnel televisuel numerique et appareil destine a la gestion simultanee de programmes televisuels multiples
US20030123657A1 (en) * 2001-12-31 2003-07-03 General Instrument Corporation Methods and apparatus for simultaneously decrypting multiple services received on separate multiplexed transport streams
EP1499135A2 (fr) * 2003-07-18 2005-01-19 Canon Kabushiki Kaisha Multiplexage et démultiplexage de données numériques
EP1583355A1 (fr) * 2002-12-16 2005-10-05 Semiconductores Investigacion Y Diseno S.A. -(SIDSA) Dispositif permettant d'acheminer des flux de donnees provenant de divers dispositifs de transport mpeg (motion picture expert group) vers des dispositifs associes
US20070074256A1 (en) * 2005-09-27 2007-03-29 Electronics And Telecommunications Research Institute Apparatus for receiving cable TV broadcasting program, and multiplexer and de-multiplexer thereof
WO2007088482A1 (fr) * 2006-02-03 2007-08-09 Ati Technologies, Inc Suppression de gigue dans un flux de transport
US7394834B2 (en) 2003-03-26 2008-07-01 Sony United Kingdom Limited Common interface controller and method of descrambling transport stream channels
US20090144766A1 (en) * 2007-12-04 2009-06-04 Joon Young Jung Method and apparatus for multi-stream processing of set top box in downloadable conditional access system

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US6973258B1 (en) * 1998-10-02 2005-12-06 Lg Electronics Inc. Method and apparatus for recording digital data streams
JP2002077092A (ja) * 2000-09-01 2002-03-15 Sony Corp 多重装置、受信装置及び多重伝送方法
KR100752482B1 (ko) * 2001-07-07 2007-08-28 엘지전자 주식회사 멀티채널 스트림 기록 재생장치 및 방법
WO2004082273A1 (fr) * 2003-03-11 2004-09-23 Pioneer Corporation Dispositif, procede et support d'enregistrement d'informations, programme informatique de commande d'enregistrement
JP3943516B2 (ja) * 2003-03-27 2007-07-11 松下電器産業株式会社 画像再生装置
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WO2002041625A1 (fr) * 2000-11-17 2002-05-23 Scm Microsystems Gmbh Procedes d'acces conditionnel televisuel numerique et appareil destine a la gestion simultanee de programmes televisuels multiples
US20030123657A1 (en) * 2001-12-31 2003-07-03 General Instrument Corporation Methods and apparatus for simultaneously decrypting multiple services received on separate multiplexed transport streams
EP1583355A1 (fr) * 2002-12-16 2005-10-05 Semiconductores Investigacion Y Diseno S.A. -(SIDSA) Dispositif permettant d'acheminer des flux de donnees provenant de divers dispositifs de transport mpeg (motion picture expert group) vers des dispositifs associes
US7394834B2 (en) 2003-03-26 2008-07-01 Sony United Kingdom Limited Common interface controller and method of descrambling transport stream channels
EP1499135A2 (fr) * 2003-07-18 2005-01-19 Canon Kabushiki Kaisha Multiplexage et démultiplexage de données numériques
US20070074256A1 (en) * 2005-09-27 2007-03-29 Electronics And Telecommunications Research Institute Apparatus for receiving cable TV broadcasting program, and multiplexer and de-multiplexer thereof
WO2007088482A1 (fr) * 2006-02-03 2007-08-09 Ati Technologies, Inc Suppression de gigue dans un flux de transport
US20090144766A1 (en) * 2007-12-04 2009-06-04 Joon Young Jung Method and apparatus for multi-stream processing of set top box in downloadable conditional access system

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Also Published As

Publication number Publication date
GB201212406D0 (en) 2012-08-22
GB2500616A (en) 2013-10-02
GB2500734A (en) 2013-10-02
TW201401853A (zh) 2014-01-01
GB201205299D0 (en) 2012-05-09

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