05894320 is referenced by 246 patents and cites 14 patents.

A television viewer can select among a choice of available camera angles and audio feeds when viewing a sporting event such as a football game without changing the television channel. Audio, video and control data is transmitted in a packetized data stream with control data providing a pre-assigned channel designation (e.g., channel 10 for network X). A set-top terminal receives and processes the data stream according to user-provided commands. The terminal includes software which can be downloaded via the data stream or installed locally. The control data in the data stream is used to provide an on-screen graphical display on the television that allows the user to select the audio and video which correspond to certain areas of the football stadium, for example. Optionally, the viewer may select alternative story lines in a movie or similar program. A default setting provides primary audio and video signals. Alternative audio and video signals are selected by the user and mapped to the channel designator of the primary signal so that the different camera angles and audio feeds may be seen and heard. The viewer is therefore given the opportunity to customize the programming to enhance the entertainment or educational value.

Title
Multi-channel television system with viewer-selectable video and audio
Application Number
8/654901
Publication Number
5894320
Application Date
May 29, 1996
Publication Date
April 13, 1999
Inventor
Paul D Vancelette
Langhorne
PA, US
Agent
Ralph F Hoppin
Barry R Lipsitz
Assignee
General Instrument Corporation
PA, US
IPC
H04N 7/173
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