Methods and Systems for Combined Lossless and Lossy Coding
AssigneeOP Solutions, LLC
InventorsHari Kalva, Borivoje Furht, Velibor Adzic
Life of this patent
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Abstract
A decoder includes circuitry configured to receive a bitstream identify, in the bitstream, a current frame, wherein the current frame includes a first region and a third region, detect, in the bitstream, an indication that the first region is encoded according to a lossless encoding protocol, and decode the current frame, wherein decoding the current frame further comprises decoding the first region using a lossless decoding protocol corresponding to the lossless encoding protocol.
Claims20
1-20. (canceled)
A decoder, the decoder comprising circuitry configured to:
- receive, in a bitstream, a coded picture, the picture comprising a first region, a second region, and a third region;
- detect, in the bitstream, that the first region is encoded using block differential pulse code modulation;
- detect, in the bitstream, that the second region is encoded using transform skip mode but not block differential pulse code modulation;
- and
- detect, in the bitstream, that the third region is encoded using lossy encoding, wherein the lossy encoding includes at least one of inter-prediction or intra-prediction, discrete cosine transform of residual pixel values, and quantization of transform coefficients.
The decoder of claim 1, wherein the first region is an independently coded sub-picture.
The decoder of claim 1, wherein the second region is an independently coded sub-picture.
The decoder of claim 1, wherein the first region is a first independently coded sub-picture and the second region is a second independently coded sub-picture.
The decoder of claim 1, wherein:
- the bitstream further includes a sub-picture header corresponding to the second region;
- and
- the decoder is further configured to detect the indication that the second using transform skip residual_coding is encoded using transform skip residual_coding in the sub-picture header.
The decoder of claim 1, wherein the decoder is further configured to:
- decode the first region using a first processor thread;
- and
- decode the second region using a second processor thread.
The decoder of claim 1, further configured to decode a current frame, wherein decoding the current frame further comprises decoding the first region using a decoding protocol corresponding to block differential pulse code modulation.
The decoder of claim 1, further configured to decode a current frame, wherein decoding the current frame further comprises decoding the third region using a decoding protocol corresponding to the lossy encoding protocol.
The decoder of claim 1, wherein the first sub-picture includes a first group of one or more coding tree units, the second sub-picture includes a second group of one or more coding tree units and the remainder of the picture includes a third group of coding tree units.
The decoder of claim 1, where the location of the first sub-picture in the picture is signaled in the bitstream and the location of the second sub-picture in the picture is signaled in the bitstream.
The decoder of claim 1 wherein the first region comprises a first plurality of coding units, the second region comprises a second plurality of coding units and the third region comprises the remainder of the picture.
A method of combined lossless and lossy decoding, the method comprising:
- receiving, by a decoder comprising circuitry, in a bitstream, a coded picture, the picture comprising a first region, a second region, and a third region;
- detecting, by the decoder and in the bitstream, that the first region is encoded using block differential pulse code modulation;
- detecting, by the decoder and in the bitstream, that the second region is encoded using transform skip mode but not block differential pulse code modulation;
- and
- detecting, by the decoder and in the bitstream, that the third region is encoded using lossy encoding, wherein the lossy encoding includes at least one of inter-prediction or intra-prediction, discrete cosine transform of residual pixel values, and quantization of transform coefficients.
The method of claim 11, further comprising:
- decoding the first region using a first processor thread;
- and
- decoding the third region element using a second processor thread.
The method of claim 11, further comprising decoding a current frame, wherein decoding the current frame further comprises decoding the first region using a decoding protocol corresponding to block differential pulse code modulation.
A decoder comprising circuitry configured to decode a coded picture received in a bitstream, the coded picture including:
- a first region coded using block differential pulse code modulation (BDPCM),
- a second region coded using transform skip mode but not BDPCM, and
Dependencies are inferred from the claim text.