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US 2020/0404261 A1Published application
Methods and apparatus for multiple line intra prediction in video compression
AssigneeTencent America LLC
InventorsLiang Zhao, Xin Zhao, Xiang Li, Shan Liu
Life of this patent
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Abstract
There is includes a method and apparatus comprising computer code configured to cause a hardware processor or processors to perform intra prediction among a plurality of reference lines, to set a plurality of intra prediction modes for a zero reference line nearest to a current block of the intra prediction among non-zero reference lines, and to set one or more most probable modes for one of the non-zero reference lines.
Claims20
A method for video decoding performed by at least one processor, the method comprising:
- performing decoding of a video sequence by intra prediction among a plurality of reference lines of the video sequence;
- setting a plurality of intra prediction modes for a zero reference line nearest to a current block of the intra prediction among a plurality of non-zero reference lines;
- setting one or more most probable modes for one of the non-zero reference lines;
- setting a length of a most probable mode list based on a reference line index value such that the length of the most probable mode list comprises a number of the one or more most probable modes;
- setting, in response to detecting the one of the non-zero reference lines, the length of the most probable mode list to 5;
- and
- setting, in response to determining that a current reference line is a zero reference line, the length of the most probable mode list to 6,
- wherein the one or more most probable modes are included in the most probable mode list, and
- wherein a planar mode and a DC mode are absent from the most probable mode list.
6 more elements
An apparatus comprising:
- at least one memory configured to store computer program code;
- at least one hardware processor configured to access the computer program code and operate as instructed by the computer program code, the computer program code including:
- decoding code configured to cause the processor to decode a video sequence by performing intra prediction among a plurality of reference lines of the video sequence;
- intra prediction mode code configured to cause the at least one processor to set a plurality of intra prediction modes for a zero reference line nearest to a current block of the intra prediction among a plurality of non-zero reference lines;
- and
- most probable mode code configured to cause the at least one processor to set one or more most probable modes for one of the non-zero reference lines,
- wherein the most probable mode code is further configured to cause the at least one processor to set a length of the most probable mode list based on a reference line index value such that the length of the most probable mode list comprises a number of the one or more most probable modes,
- wherein the most probable mode code is further configured to cause the at least one processor to set, in response to detecting the non-zero reference line, the length of the most probable mode list to 5, and
- wherein the most probable mode code is further configured to cause the at least one processor to set, in response to determining that a current reference line is a zero reference line, the length of the most probable mode list to 6.
6 more elements
A non-transitory computer readable medium storing a program causing a computer to execute a process, the process comprising:
- performing decoding of a video sequence by intra prediction among a plurality of reference lines of the video sequence;
- setting a plurality of intra prediction modes for a zero reference line nearest to a current block of the intra prediction among a plurality of non-zero reference lines;
- setting one or more most probable modes for one of the non-zero reference lines;
- setting a length of a most probable mode list based on a reference line index value such that the length of the most probable mode list comprises a number of the one or more most probable modes;
- setting, in response to detecting the one of the non-zero reference lines, the length of the most probable mode list to 5;
- and
- setting, in response to determining that a current reference line is a zero reference line, the length of the most probable mode list to 6.
4 more elements
Dependencies are inferred from the claim text.