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
An encoder includes circuitry configured to receive a video signal and generate an encoded bitstream for decoding by a decoder which identifies, in the bitstream, a current frame, wherein the current frame includes a plurality of regions, detect, in the bitstream, an indication that a first region is encoded according to a lossless encoding protocol and another region is encoded according to a lossy 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.
Claims8
An encoder configured to:
- receive a video signal;
- encode a bitstream for decoding by a compliant decoder, the decoder configured to:
- receive the encoded bitstream including a header and a coded picture;
- determine, using the header, a location of a first independently coded sub-picture in the coded picture and a location of a second independently coded sub-picture in the picture, the first sub-picture comprising a first plurality of CTUs in the picture and the second sub-picture comprising a second plurality of CTUs in the picture;
- determine that the first sub-picture is coded using a lossless coding protocol;
- decode the first sub-picture using the lossless coding protocol;
- determine that the second sub-picture is coded using a lossy coding protocol;
- and
- decode the second sub-picture using the lossy coding protocol.
A non-transitory computer-readable recording medium storing an encoded bitstream which is decodable by a decoding method, the method comprising:
- receiving the encoded bitstream including a header and a coded picture;
- determining, using the header, a location of a first independently coded sub-picture in the coded picture and a location of a second independently coded sub-picture in the picture, the first sub-picture comprising a first plurality of CTUs in the picture and the second sub-picture comprising a second plurality of CTUs in the picture;
- determining that the first sub-picture is coded using a lossless coding protocol;
- decoding the first sub-picture using the lossless coding protocol;
- determining that the second sub-picture is coded using a lossy coding protocol;
- and
- decoding the second sub-picture using the lossy coding protocol.
Dependencies are inferred from the claim text.