WO2008129200A2 - Method for channel surfing time improvement - Google Patents

Method for channel surfing time improvement Download PDF

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Publication number
WO2008129200A2
WO2008129200A2 PCT/FR2008/050429 FR2008050429W WO2008129200A2 WO 2008129200 A2 WO2008129200 A2 WO 2008129200A2 FR 2008050429 W FR2008050429 W FR 2008050429W WO 2008129200 A2 WO2008129200 A2 WO 2008129200A2
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WO
WIPO (PCT)
Prior art keywords
audio
type
video
receiver
data
Prior art date
Application number
PCT/FR2008/050429
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French (fr)
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WO2008129200A3 (en
Inventor
Thierry Quere
Renaud Rigal
Nicolas Debomy
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Thomson Licensing
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Publication of WO2008129200A2 publication Critical patent/WO2008129200A2/en
Publication of WO2008129200A3 publication Critical patent/WO2008129200A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • 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]
    • H04N21/40—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
    • 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
    • H04N21/435—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]
    • H04N21/40—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
    • H04N21/4383—Accessing a communication channel
    • H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP

Definitions

  • the present invention relates to the field of audio / video stream processing.
  • the present invention relates more particularly to an audio / video receiver / decoder, preferably of the IP (Internet Protocol) type, comprising means for reducing the zapping time.
  • IP Internet Protocol
  • the receiver / decoder configures a filter to be notified of a PAT (Program Association Table).
  • PAT Program Association Table
  • This table contains the list of PMTs (Program Map Table) or services broadcast on the target frequency.
  • This PMT table contains the list of Audio and Video PIDs broadcast on the service and, in the case of encrypted services, the PID of the ECMs ⁇ Entitlement Control Message).
  • a PID ⁇ Packet ID or Packet Identity) is used to identify audio / video streams in DVB "Digital Video Broadcasting" standards.
  • the receiver / decoder indicates to the drivers (or drivers) Audio and Video their respective PID. If the service is encrypted, Audio and Video data is not decoded.
  • the receiver / decoder configures a filter to be notified of the current ECM, in order to be able to decode the data.
  • This table contains the service attributes and the encrypted control word.
  • the receiver / decoder transmits a message to the Access Control module, responsible for verifying the rights and decrypting the control word.
  • Access Control can rely on a smart card or on a cardless encryption module (also called smartCardLess).
  • the technical problem that the present invention proposes to solve is to reduce the passage time between two channels in the context of audio / video streams, preferably relying on the IP ⁇ Internet Protocol).
  • the present invention relates, in its most general sense, to a method for operating MPEG audio / video streams within a receiver / decoder, comprising:
  • a step of receiving a change of channel command a step of receiving MPEG-type audio / video data; characterized in that it further comprises:
  • said method further comprises a step of reuse of data already received following a descrambling of data.
  • the receiver / decoder is of the IP (Internet Protocol) type.
  • FIG. 1 illustrates a digital receiver / decoder of the IP (Internet Protocol) type
  • Figure 2 illustrates the sequencing of events during zapping
  • - Figure 3 shows the zapping process in an IP environment.
  • Figure 1 shows an IP-based digital receiver / decoder connected to a DSL ("Digital Subscriber Line”) modem and a television.
  • DSL Digital Subscriber Line
  • the receiver / decoder is called STB ("Set-Top Box") and includes conventional components: an Ethernet interface for connection to the modem, random or volatile memory (RAM or Random Access Memory), non-volatile memory (Flash) , a processor (CPU), a graphics management unit (graphics), an audio / video decoding unit and a television-usable signal conversion unit (denoted PAL / NTSC in FIG. 1).
  • STB Set-Top Box
  • the receiver / decoder transmits a TV signal on the television.
  • a TS Transport Stream
  • This is a definition well known to those skilled in the field of audio and video data processing.
  • Figure 2 shows the useful elements of a
  • TS in time and illustrates the sequencing of events during a zapping from the moment the data begin to arrive in the decoder (tO on the
  • a computer program embedded in the receiver / decoder first acquires the PAT (tl in Figure 2) (Program Association Table) to obtain the PID ⁇ Packet ID or package identity) of the PMT (Program Map Table) in the program. purpose of filtering it. It then retrieves the PMT (t2 in Figure 2) for audio, video and ECM (Entitlement Control Message) PIDS in the case of an encrypted program. It can then filter the ECM (t3 in Figure 2), check the rights on the program with the access control module, before filling the descrambler with the control word contained in this table. The descrambler can then decrypt the audio and video components.
  • PAT program Association Table
  • PMT Program Map Table
  • ECM Entitlement Control Message
  • the same data are replayed several times so as not to lose the audio and video components during the acquisition phase of the tables and the processing of the ECM.
  • the data are replayed from t0 after the acquisition of the PAT (tl), then they are replayed a second time after the acquisition of the PMT (t2), and finally they are played again a third time. times since t0 from the time the data is descrambled, that is, after t4. All this makes it possible to gain at the same time on the times of acquisition of the tables and especially on the time of storage in buffer memory (or "Buffering") between t4 and t5 because we have a buffer already filled.
  • the third repetition is triggered on an event of type "FREE_TO_AIR". Repetition between acquisition of PAT and PMT can be avoided if the repetition rate of these two tables is high enough in the TS.
  • Figure 3 shows the zapping process in an IP environment.
  • the present invention is applicable to all MPEG-type Audio / Video systems.

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

Abstract

The present invention relates to a method for the exploitation of audio/video streams of the MPEG type in a receiver/decoder, comprising: a step of receiving a request for changing of a channel; a step of receiving MPEG-type audio/video data; characterized in that it also includes: a step for the re-use of already received data following the acquisition of PAT-type (Program Association Table) tables; and a step of reuse of data already received following the acquisition of PAT-type (Program Association Table) tables.

Description

PROCEDE D'AMELIORATION DU TEMPS DE ZAPPING METHOD FOR IMPROVING ZAPPING TIME
Domaine de l'inventionField of the invention
La présente invention se rapporte au domaine du traitement de flux audio/vidéo.The present invention relates to the field of audio / video stream processing.
La présente invention se rapporte plus particulièrement à un récepteur/décodeur audio/vidéo, de préférence de type IP {Internet Protocol) comportant des moyens pour réduire le temps de zapping.The present invention relates more particularly to an audio / video receiver / decoder, preferably of the IP (Internet Protocol) type, comprising means for reducing the zapping time.
Etat de la techniqueState of the art
L'installation d'un service numérique pour un système compatible MPEG est mise en œuvre de la façon suivante, indépendamment du type de support (câble, satellite, terrestre ou IP) :The installation of a digital service for an MPEG compatible system is implemented as follows, regardless of the type of support (cable, satellite, terrestrial or IP):
1) A réception des premières données, le récepteur/décodeur configure un filtre pour être notifié d'une PAT (Program Association Table). Cette table contient la liste des PMT (Program Map Table) ou services diffusés sur la fréquence visée.1) On receipt of the first data, the receiver / decoder configures a filter to be notified of a PAT (Program Association Table). This table contains the list of PMTs (Program Map Table) or services broadcast on the target frequency.
2) Lors d'une notification de cette PAT, le récepteur/décodeur configure un filtre pour être notifié de la PMT visée. Cette table PMT contient la liste des PIDs Audio et Vidéo diffusés sur le service et, dans le cas des services cryptés, le PID des ECMs {Entitlement Control Message) . Un PID {Packet ID ou identité de paquet) est utilisé pour identifier des flux audio/vidéo dans les normes DVB "Digital Video Broadcasting" .2) During a notification of this PAT, the receiver / decoder configures a filter to be notified of the target PMT. This PMT table contains the list of Audio and Video PIDs broadcast on the service and, in the case of encrypted services, the PID of the ECMs {Entitlement Control Message). A PID {Packet ID or Packet Identity) is used to identify audio / video streams in DVB "Digital Video Broadcasting" standards.
3) Lors d'une notification de la PMT, le récepteur/décodeur indique aux pilotes (ou drivers) Audio et Vidéo leur PID respectif. Si le service est crypté, les données Audio et Vidéo ne sont pas décodées. Le récepteur/décodeur configure un filtre afin d'être notifié de 1 'ECM courant, pour pouvoir effectuer le décodage des données. Cette table contient les attributs du service ainsi que le mot de contrôle chiffré.3) During a notification of the PMT, the receiver / decoder indicates to the drivers (or drivers) Audio and Video their respective PID. If the service is encrypted, Audio and Video data is not decoded. The receiver / decoder configures a filter to be notified of the current ECM, in order to be able to decode the data. This table contains the service attributes and the encrypted control word.
4) Lors d'une notification de l'ECM, le récepteur/décodeur transmet un message au module de Contrôle d'Accès, chargé de vérifier les droits et de déchiffrer le mot de contrôle. Le Contrôle d'Accès peut s'appuyer sur une carte à puce ou sur un module de chiffrement sans carte (encore appelé smartCardLess) .4) During a notification from the ECM, the receiver / decoder transmits a message to the Access Control module, responsible for verifying the rights and decrypting the control word. Access Control can rely on a smart card or on a cardless encryption module (also called smartCardLess).
5) Si la réponse du Contrôle d'Accès est positive, le désembrouilleur (descrambler) des composantes Audio et Vidéo est configuré avec cette valeur et les données déchiffrées arrivent enfin aux pilotes (drivers) Audio et Vidéo.5) If the Access Control response is positive, the descrambler of the Audio and Video components is configured with this value and the decrypted data finally arrives at the Audio and Video drivers.
Dans le cadre de la vidéo sur IP, les pilotesAs part of the IP video, pilots
(drivers) Audio et Vidéo, du fait de la gigue, ne peuvent s'asservir sur les PCR (Program Clock Référence) . Il est donc nécessaire d'emmagasiner en mémoire tampon (buffer) environ 300 K octets de données vidéo avant de lancer le décodage et de présenter les images.(drivers) Audio and Video, because of the jitter, can not be enslaved on PCR (Program Clock Reference). It is therefore necessary to buffer about 300 K bytes of video data before decoding and presenting the images.
Exposé de l'inventionPresentation of the invention
Le problème technique que la présente invention se propose de résoudre consiste à diminuer le temps de passage entre deux canaux dans le cadre de flux audio/vidéo, s' appuyant de préférence sur le protocole IP {Internet Protocol) .The technical problem that the present invention proposes to solve is to reduce the passage time between two channels in the context of audio / video streams, preferably relying on the IP {Internet Protocol).
A cet effet, la présente invention concerne, dans son acception la plus générale, un procédé pour l'exploitation de flux audio/vidéo de type MPEG au sein d'un récepteur/décodeur, comprenant :For this purpose, the present invention relates, in its most general sense, to a method for operating MPEG audio / video streams within a receiver / decoder, comprising:
- une étape de réception de commande de changement de canal ; - une étape de réception de données audio/vidéo de type MPEG ; caractérisé en ce qu'il comporte en outre :a step of receiving a change of channel command; a step of receiving MPEG-type audio / video data; characterized in that it further comprises:
- une étape de réutilisation de données déjà reçues à la suite de l'acquisition de tables de type PAT (Program Association Table) ; eta step of reuse of data already received following the acquisition of tables of the PAT (Program Association Table) type; and
- une étape de réutilisation de données déjà reçues à la suite de l'acquisition de tables de type PMT (Program Map Table) .a step of reuse of data already received following the acquisition of PMT (Program Map Table) type tables.
Ceci permet d'exploiter les données vidéo et audio et amène un gain de l'ordre du temps des phases d'acquisition des tables PAT (Program Association Table) et PMT (Program Map Table) et du temps de traitement de l'ECM (Entitlement Control Message) , soit environ 800ms.This makes it possible to exploit the video and audio data and brings a gain in the time order of the acquisition phases of the Program Association Table (PAT) and Program Map Table (PMT) tables and the ECM processing time ( Entitlement Control Message), about 800ms.
Avantageusement, ledit procédé comporte en outre une étape de réutilisation de données déjà reçues à la suite d'un désembrouillage de données.Advantageously, said method further comprises a step of reuse of data already received following a descrambling of data.
De préférence, le récepteur/décodeur est de type IP {Internet Protocol).Preferably, the receiver / decoder is of the IP (Internet Protocol) type.
Brève description des dessinsBrief description of the drawings
On comprendra mieux l'invention à l'aide de la description, faite ci-après à titre purement explicatif, d'un mode de réalisation de l'invention, en référence aux figures annexées : - la Figure 1 illustre un récepteur/décodeur numérique de type IP (Internet Protocol) ; la Figure 2 illustre le séquencement des événements lors d'un zapping ; et - la Figure 3 représente le processus de zapping dans un environnement IP.The invention will be better understood from the following description, given purely for explanatory purposes, of one embodiment of the invention, with reference to the appended figures: FIG. 1 illustrates a digital receiver / decoder of the IP (Internet Protocol) type; Figure 2 illustrates the sequencing of events during zapping; and - Figure 3 shows the zapping process in an IP environment.
Description détaillée des modes de réalisation de l'inventionDETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION
La Figure 1 illustre un récepteur/décodeur numérique de type IP (Internet Protocol) connecté à un modem DSL (« Digital Subscriber Line ») et à une télévision.Figure 1 shows an IP-based digital receiver / decoder connected to a DSL ("Digital Subscriber Line") modem and a television.
Le récepteur/décodeur est noté STB (« Set -Top Box ») et comporte des composants classiques : une interface Ethernet pour la connexion au modem, une mémoire vive ou volatile (RAM ou Random Access Memory) , une mémoire non volatile (Flash) , un processeur (CPU) , une unité de gestion des graphismes (Graphics) , une unité de décodage audio/vidéo et une unité de conversion en signaux exploitables par une télévision (noté PAL/NTSC sur la Figure 1) . Le récepteur/décodeur transmet un signal TV à la télévision.The receiver / decoder is called STB ("Set-Top Box") and includes conventional components: an Ethernet interface for connection to the modem, random or volatile memory (RAM or Random Access Memory), non-volatile memory (Flash) , a processor (CPU), a graphics management unit (graphics), an audio / video decoding unit and a television-usable signal conversion unit (denoted PAL / NTSC in FIG. 1). The receiver / decoder transmits a TV signal on the television.
Un TS (Transport Stream) est un multiplexe de vidéo, d'audio et de tables se rapportant à ces composantes. Ceci est une définition bien connue de l'homme du métier dans le domaine du traitement de données audio et vidéo.A TS (Transport Stream) is a multiplex of video, audio and tables related to these components. This is a definition well known to those skilled in the field of audio and video data processing.
La Figure 2 représente les éléments utiles d'unFigure 2 shows the useful elements of a
TS dans le temps et illustre le séquencement des événements lors d'un zapping à partir du moment où les données commencent à arriver dans le décodeur (tO sur laTS in time and illustrates the sequencing of events during a zapping from the moment the data begin to arrive in the decoder (tO on the
Figure 2) . Un programme informatique embarqué dans le récepteur/décodeur acquiert tout d'abord la PAT (tl sur la Figure 2) (Program Association Table) pour obtenir le PID {Packet ID ou identité de paquet) de la PMT (Program Map Table) dans le but de la filtrer. Il récupère ensuite la PMT (t2 sur la Figure 2) pour connaître les PIDS audio, vidéo et ECM {Entitlement Control Message) dans le cas d'un programme crypté. Il peut ensuite filtrer l'ECM (t3 sur la Figure 2) , vérifier les droits sur le programme auprès du module de contrôle d'accès, avant de renseigner le désembrouilleur (descrambler) avec le mot de contrôle contenu dans cette table. Le désembrouilleur {descrambler) peut alors déchiffrer les composantes audio et vidéo. Et c'est seulement à partir de ce moment (t4 sur la Figure 2) qu'il est possible d'exploiter les données audio et vidéo pour les décoder. Ce déroulement montre que toutes les données audio et vidéo reçues avant t4 sont perdues, alors qu'elles représentent entre 80 et 90% du TS. Et le zapping n'est pas encore terminé car, comme cela a été expliqué ci-dessus, il faut encore attendre d'avoir d'emmagasiné en mémoire tampon (buffer) au moins 300 K octets de vidéo avant de commencer à présenter (t5 sur la Figure 2) les images.Figure 2). A computer program embedded in the receiver / decoder first acquires the PAT (tl in Figure 2) (Program Association Table) to obtain the PID {Packet ID or package identity) of the PMT (Program Map Table) in the program. purpose of filtering it. It then retrieves the PMT (t2 in Figure 2) for audio, video and ECM (Entitlement Control Message) PIDS in the case of an encrypted program. It can then filter the ECM (t3 in Figure 2), check the rights on the program with the access control module, before filling the descrambler with the control word contained in this table. The descrambler can then decrypt the audio and video components. And it is only from this moment (t4 in Figure 2) that it is possible to use the audio and video data to decode them. This shows that all the audio and video data received before t4 are lost, whereas they represent between 80 and 90% of the TS. And the zapping is not over yet because, as explained above, we still have to wait to have buffered at least 300 K bytes of video before starting to present (t5 in Figure 2) the images.
Dans le cadre de la présente invention, les mêmes données sont rejouées plusieurs fois pour ne pas perdre les composantes audio et vidéo pendant la phase d'acquisition des tables et du traitement de l'ECM. Dans un mode de réalisation, on rejoue les données à partir de tO après l'acquisition de la PAT (tl), puis on les rejoue une deuxième fois après l'acquisition de la PMT (t2), et enfin on les rejoue une troisième fois depuis tO à partir du moment où les données sont désembrouillées, c'est-à- dire après t4. Tout ceci permet de gagner à la fois sur les temps d'acquisition des tables et surtout sur le temps d' emmagasinement en mémoire tampon (ou « bufferisation ») entre t4 et t5 car ainsi nous disposons d'une mémoire tampon déjà remplie. Dans le cas d'un programme en clair, la troisième répétition se déclenche sur un événement de type « FREE_TO_AIR ». La répétition entre l'acquisition de PAT et PMT peut être évitée si la fréquence de répétition de ces deux tables est assez élevée dans le TS.In the context of the present invention, the same data are replayed several times so as not to lose the audio and video components during the acquisition phase of the tables and the processing of the ECM. In one embodiment, the data are replayed from t0 after the acquisition of the PAT (tl), then they are replayed a second time after the acquisition of the PMT (t2), and finally they are played again a third time. times since t0 from the time the data is descrambled, that is, after t4. All this makes it possible to gain at the same time on the times of acquisition of the tables and especially on the time of storage in buffer memory (or "Buffering") between t4 and t5 because we have a buffer already filled. In the case of a program in the clear, the third repetition is triggered on an event of type "FREE_TO_AIR". Repetition between acquisition of PAT and PMT can be avoided if the repetition rate of these two tables is high enough in the TS.
La Figure 3 représente le processus de zapping dans un environnement IP.Figure 3 shows the zapping process in an IP environment.
La présente invention peut s'appliquer à tous les systèmes Audio/ Vidéo de type MPEG.The present invention is applicable to all MPEG-type Audio / Video systems.
L'invention est décrite dans ce qui précède à titre d'exemple. Il est entendu que l'homme du métier est à même de réaliser différentes variantes de l'invention sans pour autant sortir du cadre du brevet. The invention is described in the foregoing by way of example. It is understood that the skilled person is able to realize different variants of the invention without departing from the scope of the patent.

Claims

REVENDICATIONS
1. Procédé pour l'exploitation de flux audio/vidéo de type MPEG au sein d'un récepteur/décodeur, comprenant :A method for operating MPEG audio / video streams within a receiver / decoder, comprising:
- une étape de réception de commande de changement de canal ; une étape de réception de données audio/vidéo de type MPEG ; caractérisé en ce qu'il comporte en outre :a step of receiving a change of channel command; a step of receiving MPEG-type audio / video data; characterized in that it further comprises:
- une étape de réutilisation de données déjà reçues à la suite de l'acquisition de tables de type PAT (Program Association Table) ; eta step of reuse of data already received following the acquisition of tables of the PAT (Program Association Table) type; and
- une étape de réutilisation de données déjà reçues à la suite de l'acquisition de tables de type PMT (Program Mapa step of reuse of data already received following the acquisition of PMT type tables (Program Map
Table) .Table).
2. Procédé pour l'exploitation de flux audio/vidéo au sein d'un récepteur/décodeur selon la revendication 1, caractérisé en ce qu'il comporte en outre une étape de réutilisation de données déjà reçues à la suite d'un désembrouillage de données.2. A method for operating audio / video streams in a receiver / decoder according to claim 1, characterized in that it further comprises a step of reuse of data already received following a descrambling of data.
3. Procédé pour l'exploitation de flux audio/vidéo au sein d'un récepteur/décodeur selon la revendication 1 ou 2, caractérisé en ce que le récepteur/décodeur est de type IP {Internet Protocol) . 3. A method for operating audio / video streams within a receiver / decoder according to claim 1 or 2, characterized in that the receiver / decoder is of type IP (Internet Protocol).
PCT/FR2008/050429 2007-03-16 2008-03-13 Method for channel surfing time improvement WO2008129200A2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016172A (en) * 1995-11-28 2000-01-18 Samsung Electronics Co., Ltd. Method for reducing a channel hopping time in an MPEG-2 system decoder
WO2003088646A2 (en) * 2002-04-08 2003-10-23 Thomson Licensing S.A. Apparatus and method for data caching to reduce channel change delay
WO2006121801A1 (en) * 2005-05-10 2006-11-16 Thomson Licensing Method and apparatus for caching access information for faster digital cable tuning

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016172A (en) * 1995-11-28 2000-01-18 Samsung Electronics Co., Ltd. Method for reducing a channel hopping time in an MPEG-2 system decoder
WO2003088646A2 (en) * 2002-04-08 2003-10-23 Thomson Licensing S.A. Apparatus and method for data caching to reduce channel change delay
WO2006121801A1 (en) * 2005-05-10 2006-11-16 Thomson Licensing Method and apparatus for caching access information for faster digital cable tuning

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