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1. WO2001043442 - METHOD AND APPARATUS FOR TWO-WAY INTERNET ACCESS OVER NETWORK A CATV WITH CHANNEL TRACKING

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Publication Number WO/2001/043442
Publication Date 14.06.2001
International Application No. PCT/US2000/042591
International Filing Date 06.12.2000
Chapter 2 Demand Filed 07.07.2001
IPC
H04N 7/173 2011.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
16Analogue secrecy systems; Analogue subscription systems
173with two-way working, e.g. subscriber sending a programme selection signal
H04L 12/56 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
54Store-and-forward switching systems
56Packet switching systems
H04N 7/16 2011.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
16Analogue secrecy systems; Analogue subscription systems
CPC
H04L 45/22
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
45Routing or path finding of packets in data switching networks
22Alternate routing
H04N 21/235
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23Processing of content or additional data; Elementary server operations; Server middleware
235Processing of additional data, e.g. scrambling of additional data or processing content descriptors
H04N 21/23614
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23Processing of content or additional data; Elementary server operations; Server middleware
236Assembling 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
23614Multiplexing of additional data and video streams
H04N 21/2362
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23Processing of content or additional data; Elementary server operations; Server middleware
236Assembling 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
2362Generation or processing of Service Information [SI]
H04N 21/42676
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
41Structure of client; Structure of client peripherals
426Internal components of the client ; ; Characteristics thereof;
42676for modulating an analogue carrier signal to encode digital information or demodulating it to decode digital information, e.g. ADSL or cable modem
H04N 21/4348
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
43Processing 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
434Disassembling 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
4348Demultiplexing of additional data and video streams
Applicants
  • LIBERATE TECHNOLOGIES, MORECOM DIVISION, INC. [US]/[US]
Inventors
  • MAO, Weidong
  • CHEN, David
  • MIRON, Ami
Agents
  • JACOBSON, Allan, J.
Priority Data
60/169,96709.12.1999US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR TWO-WAY INTERNET ACCESS OVER NETWORK A CATV WITH CHANNEL TRACKING
(FR) PROCEDE ET APPAREIL D'ACCES BIRECTIONNELLE A L'INTERNET SUR TELEDISTRIBUTION A REPERAGE DE CANAUX
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Abstract
(EN) Internet access is provided over a digital cable television system using Internet protocol (IP) over MPEG digital video. Simultaneous Internet access and TV viewing is provided by an IP over MPEG-2 video system with channel tracking. Whenever a video channel change is detected, the viewer's Internet connection is routed from one video channel to another video channel so that the Internet connection is dynamically routed and tracks the channel changes made by the viewer. Additionally, if there is no available data carrying capacity in the video channel selected by the viewer ( a 'busy' condition), the Internet connection is routed to an out-of-band frequency. The Internet connection tracks the channel changes made by the viewer using a single tuner/digital MPEG decoder in the CATV settop box.
(FR) La présente invention concerne l'accès à Internet sur un système numérique de télédistribution mettant en oeuvre le protocole Internet (IP) sur vidéo numérique MPEG. L'invention prévoit l'accès simultané à Internet et écoute de la télévision au moyen d'un protocole Internet sur un système vidéo MPEG-2 à repérage de canaux. Lors de la détection d'un changement de canal vidéo, la connexion Internet du téléspectateur est acheminé depuis un canal vidéo vers un autre canal vidéo de sorte que la connexion Internet soit acheminée de manière dynamique et repère les changements de canaux effectués par le téléspectateur. Par ailleurs, s'il n'existe pas de capacité porteuse de données dans le canal vidéo choisi par le téléspectateur (état d'occupation), la connexion Internet est acheminé vers une fréquence hors-bande. La connexion Internet repère les changements de canaux opérés par le téléspectateur au moyen d'un syntoniseur/décodeur numérique MPEG unique dans le boîtier de décodage de télédistribution.
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