Television – Bandwidth reduction system – Plural video programs in single channel
Patent
1994-12-28
1997-02-25
Kostak, Victor R.
Television
Bandwidth reduction system
Plural video programs in single channel
348387, H04N 712, H04N 724
Patent
active
056063695
ABSTRACT:
Video signal encoding apparatus, suitably for multiple video channels (A,B) has respective encoder stages (10,12) which encode a received video signal according to a predetermined coding scheme, such as MPEG standard, and output a variable bit-rate data stream to encoder channel buffering (16) which is combined in a single buffer (16) having a fixed physical size with separate portions assigned to each channel. Buffer management (18) varies the size of the effective buffer areas assigned to the respective channels to maintain the total effective buffer area close to but within the physical limits of the buffer, as defined by the overall sum of encoder output bit rates. The outputs of the encoder buffer are combined into a single data stream, suitably by multiplexing (28), for subsequent separation and decoding by a receiver (30 to 36).
REFERENCES:
patent: 5115309 (1992-05-01), Hang
patent: 5319457 (1994-06-01), Nakahashi et al.
patent: 5410355 (1995-04-01), Kalczynski
patent: 5442398 (1995-08-01), Koshiro
patent: 5461619 (1995-10-01), Citta et al.
patent: 5481297 (1996-01-01), Cash
Hulyalkar Samir N.
Keesman Gerrit J.
Kostak Victor R.
U.S. Philips Corporation
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