Television – Two-way video and voice communication – User positioning
Patent
1996-11-07
1999-10-12
Flynn, Nathan
Television
Two-way video and voice communication
User positioning
348 17, 348439, H04N 712
Patent
active
059661666
ABSTRACT:
The compression of composite video data is provided in order to reduce bandwidth and thereby increase the amount of bandwidth available for transmission. Composite video signals that include a plurality of fields are received at a selected clock frequency. A first selected number of fields is stored and a second selected number of fields is dropped. In a Frequency Division Multiplexing mode, the data is read out at a fraction of the selected clock frequency corresponding to the stored portion. In a Time Division Multiplexing mode, the data is read out at the selected clock frequency during selected intervals having a duration corresponding to the time it took to receive the stored fields. No data is read out during an interval having a duration equal to the time it took to scan the dropped fields, such time being allocated to the compressed information from other users of the same shared transmission medium.
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Coutinho Roy S.
Dail James E.
Pitsch Robert A.
AT&T Corp
Flynn Nathan
LandOfFree
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