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US 12,744,934 B2Granted
Method and apparatus for processing video data
AssigneeLG Electronics Inc.
InventorsJungsun Kim, Seungwook Park, Jaehyun Lim, Joonyoung Park, Younghee Choi, Jaewon Sung, Byeongmoon Jeon, Yongjoon Jeon
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Abstract
A method for signalling an intra chroma prediction mode and a method for implementing the signalled intra chroma prediction mode, the intra chroma prediction mode taking an intropolation of previously predicted luma samples from neighboring blocks of video data to attain an intra chroma prediction of a current chroma prediction unit.
Claims8
A method for decoding a video signal by a decoding apparatus, the method comprising:
- obtaining prediction mode information of a current block from the video signal, the prediction mode information indicating whether the current block is coded using inter prediction or intra prediction;
- and
- decoding the current block using the intra prediction in case the prediction mode information indicates that the current block is coded using the intra prediction,
- wherein the decoding the current block comprises:
- obtaining intra luma prediction mode information for the current block from the video signal;
- determining an intra luma prediction mode for a luma sample of the current block based on the intra luma prediction mode information;
- obtaining intra chroma prediction mode information for the current block from the video signal;
- and
- determining an intra chroma prediction mode for a chroma sample of the current block from a mapping table using the intra luma prediction mode and the intra chroma prediction mode information,
- wherein in case the intra chroma prediction mode information has a specific value, the intra chroma prediction mode is set to be the same as the intra luma prediction mode in the mapping table, and
- wherein the mapping table includes values representing a DC prediction mode and an angular prediction mode.
8 more elements
A method for encoding a video signal by an encoding apparatus, the method comprising:
- determining whether a current block is coded using inter prediction or intra prediction;
- and
- encoding the current block using the intra prediction in case the current block is coded using the intra prediction,
- wherein the encoding the current block comprises:
- determining an intra luma prediction mode for a luma sample of the current block;
- determining an intra chroma prediction mode for a chroma sample of the current block;
- encoding intra luma prediction mode information for the current block based on the intra luma prediction mode;
- and
- encoding intra chroma prediction mode information for the current block from a mapping table using the intra luma prediction mode and the intra chroma prediction mode;
- wherein in case the intra luma prediction mode and the intra chroma prediction mode are the same, the intra chroma prediction mode information is set to a specific value in the mapping table, and
- wherein the mapping table includes values representing a DC prediction mode and an angular prediction mode.
8 more elements
An apparatus for encoding a video signal, the apparatus comprising:
- an encoder configured to determine whether a current block is coded using inter prediction or intra prediction, and configured to encode the current block using the intra prediction in case the current block is coded using the intra prediction,
- wherein the encoding the current block comprises:
- determining an intra luma prediction mode for a luma sample of the current block;
- determining an intra chroma prediction mode for a chroma sample of the current block;
- encoding intra luma prediction mode information for the current block based on the intra luma prediction mode;
- and
- encoding intra chroma prediction mode information for the current block from a mapping table using the intra luma prediction mode and the intra chroma prediction mode;
- wherein in case the intra luma prediction mode and the intra chroma prediction mode are the same, the intra chroma prediction mode information is set to a specific value in the mapping table, and
- wherein the mapping table includes values representing a DC prediction mode and an angular prediction mode.
6 more elements
A method for transmitting a bitstream generated by an encoding method, the encoding method comprising:
- determining whether a current block is coded using inter prediction or intra prediction;
- and
- encoding the current block using the intra prediction in case the current block is coded using the intra prediction,
- wherein the encoding the current block comprises:
- determining an intra luma prediction mode for a luma sample of the current block;
- determining an intra chroma prediction mode for a chroma sample of the current block;
- encoding intra luma prediction mode information for the current block based on the intra luma prediction mode;
- and
- encoding intra chroma prediction mode information for the current block from a mapping table using the intra luma prediction mode and the intra chroma prediction mode;
- wherein in case the intra luma prediction mode and the intra chroma prediction mode are the same, the intra chroma prediction mode information is set to a specific value in the mapping table, and
- wherein the mapping table includes values representing a DC prediction mode and an angular prediction mode.
8 more elements
Dependencies are inferred from the claim text.