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1. WO2000043999 - METHOD AND APPARATUS FOR SYNCHRONIZING PLAYBACK OF MULTIPLE MEDIA TYPES OVER NETWORKS HAVING DIFFERENT TRANSMISSION CHARACTERISTICS

Publication Number WO/2000/043999
Publication Date 27.07.2000
International Application No. PCT/US2000/001232
International Filing Date 20.01.2000
Chapter 2 Demand Filed 21.08.2000
IPC
H04N 7/16 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
16Analogue secrecy systems; Analogue subscription systems
H04N 7/24 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
24Systems for the transmission of television signals using pulse code modulation
CPC
G11B 20/10527
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
10Digital recording or reproducing
10527Audio or video recording; Data buffering arrangements
G11B 2220/2545
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
2220Record carriers by type
20Disc-shaped record carriers
25characterised in that the disc is based on a specific recording technology
2537Optical discs
2545CDs
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 21/4307
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, synchronizing decoder's clock; Client middleware
4302Content synchronization processes, e.g. decoder synchronization
4307Synchronizing display of multiple content streams, e.g. synchronisation of audio and video output or enabling or disabling interactive icons for a given period of time
H04N 21/4331
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, synchronizing decoder's clock; Client middleware
433Content storage operation, e.g. storage operation in response to a pause request, caching operations
4331Caching operations, e.g. of an advertisement for later insertion during playback
H04N 21/435
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, synchronizing decoder's clock; Client middleware
435Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
Applicants
  • SONY ELECTRONICS, INC. [US/US]; 1 Sony Drive Park Ridge, NJ 07656, US
Inventors
  • TOFT, Rolf, Henri; US
  • NAKANO, Masahiro; US
  • ROSIN, Robert, Bradley; US
  • FUJII, Toshiya; US
  • HEADLEY, Kent, Lawrence; US
Agents
  • GARRETT, Arthur, S. ; Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. 1300 I Street, N.W. Washington, DC 20005-3315, US
Priority Data
09/235,31322.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR SYNCHRONIZING PLAYBACK OF MULTIPLE MEDIA TYPES OVER NETWORKS HAVING DIFFERENT TRANSMISSION CHARACTERISTICS
(FR) METHODE ET APPAREIL PERMETTANT DE SYNCHRONISER LA LECTURE DE PLUSIEURS TYPES DE SUPPORT DANS DES RESEAUX AUX CARACTERISTIQUES DE TRANSMISSION DIFFERENTES
Abstract
(EN)
A method for synchronizing the playback of data on a primary media (114) with data on a secondary media (112) stored remotely over a network (108) is provided. Generally, the network (108) can not deliver data on the secondary media (112) as quickly to an audio or video device as data on the primary media (114) stored in the audio or video device (102) is delivered. This makes it difficult to synchronize playback of data on the primary and secondary media. To overcome this problem, implementations of the present invention download data on the secondary media (112) in advance and coordinates the playback of the data. Initially, data on the primary media (114) is identified using a unique identifier. The unique identifier is used to locate data on the secondary media (112) stored remotely over a network (108). Data on the secondary media (112) matching the unique identifier is downloaded over the networek (108) and stored in a storage area local to the audio or video device (102) such as a cache. Timing information is then used to synchronize playback of data on the primary media (114) with data on the secondary media (112) stored in cache.
(FR)
Cette invention a trait à une méthode permettant de synchroniser la lecture de données présentes sur un support principal (114) et celles de données présentes sur un support secondaire (112), données mémorisées à distance dans un réseau (108). Le réseau (108) ne peut, généralement, fournir des données, présentes sur le support secondaire (112), à un dispositif audio ou vidéo aussi rapidement que des données présentes sur le support principal (114) mémorisées dans le dispositif audio ou vidéo (102). Cela rend difficile la synchronisation de la lecture de données sur les supports, principal et secondaire. Afin de surmonter ces difficultés, on télécharge à l'avance, dans le cadre de cette invention, des données sur le support secondaire (112) et l'on coordonne la lecture des données. Les données présentes sur le support principal (114) sont, initialement, identifiées à l'aide d'un identificateur unique. On utilise ce dernier pour localiser des données du support secondaire (112) mémorisées à distance dans un réseau (108). Les données du support secondaire (112) correspondant à l'identificateur unique sont téléchargées dans le réseau (108) et mémorisées dans une zone de mémoire locale du dispositif audio ou vidéo (102), une antémémoire notamment. On utilise alors une information de temporisation pour synchroniser la lecture des données du support principal (114) avec celle des données du support secondaire (112) mémorisées dans l'antémémoire.
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