Interactive video distribution systems – User-requested video program system – Video-on-demand
Reexamination Certificate
2001-06-14
2010-02-02
Sheleheda, James (Department: 2424)
Interactive video distribution systems
User-requested video program system
Video-on-demand
C725S090000, C725S091000, C370S431000
Reexamination Certificate
active
07657913
ABSTRACT:
A digital video system, method, and computer program product for correcting corrupted digital video transport streams is described. The digital video system may include a digital cable, digital broadcast satellite (DBS), high definition television (HDTV), or video-on demand (VOD) system. In a VOD system, a VOD client at each receiver is capable of subscribing to one or more VOD sessions. The headend includes a video server and a control server that is coupled to the video server. The video server transmits one or more VOD sessions to one or more receivers over a transport stream. The control server can also cause the video server to transmit one or more dummy sessions to maintain a predetermined minimum bandwidth of content over the transport stream. Alternatively, the headend can transmit one or more null packets having a randomized payload, as necessary, to maintain a constant bit rate over the transport stream.
REFERENCES:
patent: 5790935 (1998-08-01), Payton
patent: 5819019 (1998-10-01), Nelson
patent: 5822530 (1998-10-01), Brown
Fitch Even Tabin & Flannery
Sheleheda James
Sony Corporation
Sony Electronics Inc.
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