Flexible video encoding/decoding method
AssigneeGhildra Holdings, Inc.
InventorsMatthew J. Whealton, Kwok L. Li, Jonathan M. Katz
Life of this patent
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Abstract
A method for encoding and transmitting a video signal which includes creating a low bit rate video transport stream from the video signal. Excluded bits derived from the video signal which were not included in the base transport stream are included in one or more separate enhancement transport streams. The base transport stream and each enhancement transport stream is then separately transmitted over at least one communications network.
Claims22
A method for encoding and transmitting a video signal from a video signal source, comprising:
- transforming blocks of m by m pixels of said video signal to generate m2 transform coefficients of n-bits each;
- creating a low bit rate video base transport stream from said video signal from at least a portion of the n-bits of a first of the transform coefficients;
- creating one or more separate enhancement transport streams from excluded bits of the n-bits of the first transform coefficient and excluded bits from remaining transform coefficients of said video signal which were not included in said base transport stream;
- and
- separately transmitting the base transport stream and each enhancement transport stream as separate streams over at least one communications network.
A method for encoding and transmitting a video signal from an analog video signal source over one or more communications networks to a plurality of subscriber video receivers to derive pictures of varying quality at different receivers which includes:
- digitizing said analog video signal to obtain a digital video signal;
- transforming blocks of m by m pixels of said digital video signal to generate m2 transform coefficients of n-bits each;
- creating a low bit rate video base transport stream from said digital video signal from at least a portion of the n-bits of a first of the transform coefficients;
- creating one or more separate enhancement transport streams from excluded bits of the n-bits of the first transform coefficient and excluded bits from remaining transform coefficients of said video signal which were not included in said base transport stream;
- transmitting the base transport stream as a separate stream over a communications network to all of said plurality of video receivers;
- separately transmitting one or more selected enhancement transport streams as separate streams over a communications network to only selected ones of said video receivers;
- and
- combining the enhancement transport stream or streams received by each said selected video receiver with the base transport stream received by each selected video receiver to obtain an enhanced quality video picture.
Dependencies are inferred from the claim text.