Scalable MPEG-2 video decoder
AssigneeKoninklijke Philips Electronics N.V.
InventorsShaomin Peng, Zhun Zhong
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Abstract
A system and method for scaling an MPEG-2 video decoder subject to a resource constraint. A decoder system is provided for decoding compressed video data arranged in a group of pictures, wherein the group of pictures include I pictures, P pictures and B pictures. The system comprises a processing path for decoding an error residual associated with the group of pictures, and a filtering system for preventing the error residual associated with B pictures from being decoded by the processing path. The decoder system may further comprise a system for selectively enabling the filtering system for B pictures having a DC coefficient that is below a predetermined threshold.
Claims18
A decoder system for decoding a compressed video signal having B pictures, comprising:
- a first processing path that decodes an error residual of the compressed video signal;
- a second processing path that decodes motion compensation of the compressed video signal;
- and
- a filtering system for preventing the error residual associated with B pictures from being decoded by the first processing path.
A method for decoding compressed video data having different types of coded pictures and outputting displayable pixel data, comprising the steps of:
- receiving the compressed video data;
- providing a first and second processing path for processing the compressed video data:
- identifying pictures of a predetermined type from the compressed video data;
- and
- preventing a block associated with at least one of the identified pictures having a DC coefficient that is below a predetermined threshold from being processed by the first processing path.
A method for decoding compressed video data having different types of coded pictures and outputting displayable pixel data, comprising the steps of:
- receiving the compressed video data;
- providing a first and second processing path for processing the compressed video data:
- identifying pictures of a predetermined type from the compressed video data;
- and
- preventing a block associated with at least one of the identified pictures from being processed by the first processing path;
- wherein the compressed video data is in an MPEG-2 format, the different types of coded pictures include I pictures, P pictures and B pictures, and the at least one identified picture is a B picture.
A method for decoding compressed video data having different types of coded pictures and outputting displayable pixel data, comprising the steps of:
- receiving the compressed video data;
- providing a first and second processing path for processing the compressed video data:
- identifying pictures of a predetermined type from the compressed video data;
- and
- preventing a block associated with at least one of the identified pictures from being processed by the first processing path;
- wherein the first processing path includes an inverse quantization system and an inverse discrete cosine transform system, and the second processing path includes a motion compensation system.
A decoder system for decoding compressed video data arranged in a group of pictures, wherein the group of pictures include at least one B picture, comprising:
- a processing system for decoding an error residual block associated with the group of pictures;
- and
- a filtering system for preventing the error residual block associated with the B picture from being decoded by the processing system.
Dependencies are inferred from the claim text.