Method and apparatus for producing demand real-time television

H - Electricity – 04 – N

Patent

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Details

H04N 7/26 (2006.01) H04N 7/46 (2006.01) H04N 7/50 (2006.01) H04N 5/7826 (2006.01) H04N 7/173 (2006.01) H04N 7/16 (2006.01)

Patent

CA 2352143

A demand television system (100) comprising a broadcast encoder (250) and a storage encoder (252). The broadcast encoder encodes a real-time video frame sequence to form a broadcast bitstream and broadcasts the broadcast bitstream to a plurality of subscriber equipment (106), while simultaneously the storage encoder encodes the real-time video frame sequence to form a storage bitstream that is stored in an information server (108). The subscriber equipment decodes (510) the broadcast bitstream to display the broadcast program. At any time, the subscriber equipment may request (524) to review the information previously displayed in the broadcast bitstream. As such, the storage bitstream is transmitted (526) to the subscriber equipment. The storage bitstream facilitates standard play of the previously broadcast information as well as trick play such as fast forward and fast reverse functions.

Cette invention se rapporte à un système de télévision à la demande (100) qui comprend un codeur de télédiffusion (250) et un codeur de mémorisation (252). Le codeur de télédiffusion code une séquence de trames vidéo en temps réel, afin de former un train de bits de télédiffusion et il diffuse ce train de bits de télédiffusion à destination de plusieurs appareils d'abonnés (106) pendant que simultanément le codeur de mémorisation code la séquence de trames vidéo en temps réel, afin de former un train de bits de mémorisation qui est mémorisé dans un serveur d'informations (108). L'appareil d'abonné décode (510) le train de bits de télédiffusion pour afficher le programme de télédiffusion. A n'importe quel moment, l'appareil d'abonné peut demander (524) à revoir les informations préalablement affichées dans le train de bits de télédiffusion. Le train de bits de mémorisation est alors transmis (526) en tant que tel à l'appareil d'abonné. Le train de bits de mémorisation facilite la lecture standard des informations préalablement télédiffusées ainsi qu'une lecture en mode non naturel, telle que les fonctions d'avance rapide et de retour rapide.

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