System for synchronizing the playback of two or more connected playback devices using closed captioning
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United States of America Patent
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Aug 22, 2006
Grant Date -
May 15, 2003
app pub date -
Nov 13, 2001
filing date -
Nov 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a method and system for synchronizing the replay of a pre-recorded program between a plurality of playback devices utilizing closed-caption data. The internal block of the playback devices are synchronized. Upon receiving program content signals including a series of frames and a string of closed-caption (CC) characters, the string of CC characters is sampled at a predetermined sampling interval, and the sequence of sampled CC characters and the corresponding frame are stored according to a predetermined format in a memory. Thereafter, in response to a user's request, the desired program content signals responsive to the user's request are retrieved from the respective memory of playback devices and displayed for viewing.
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