Method for apparatus for deriving maximum sub-block transform size
AssigneeAlibaba Group Holding Limited
InventorsMohammed Golam SARWER, Jiancong LUO, Yan YE
Life of this patent
Estimating the term…
Abstract
The present disclosure provides apparatus and methods for signaling sub-block transform (SBT) information. The SBT information is used for coding video data. According to certain disclosed embodiments, an exemplary method includes: signaling a first flag in a Sequence Parameter Set (SPS) of a video sequence indicating whether a sub-block transform (SBT) is enabled; and signaling a second flag indicating a maximum transform block (TB) size that allows the SBT. A maximum coding unit (CU) size that allows the SBT is determined directly based on the maximum TB size in response to the first flag indicating that the SBT is enabled.
Claims21
-20. (canceled)
A method of decoding a bitstream to output one or more pictures for a video sequence, the method comprising:
- decoding the bitstream;
- determining, based on the decoded bitstream, a maximum transform size in luma samples;
- and
- determining whether subblock transform (SBT) is allowed for a CU of the video sequence,
- wherein the determining of whether the SBT is allowed for the CU is based on a comparison of a size of the CU to the maximum transform size in luma samples.
A method of encoding a video sequence into a bitstream, the method comprising:
- determining, for the video sequence, a maximum transform size in luma samples;
- determining whether to use subblock transform (SBT) for a coding unit of the video sequence,
- wherein the determining of whether to use the SBT for the CU is based on a comparison of a size of the CU to the maximum transform size in luma samples.
A non-transitory computer readable storage medium storing a bitstream associated with a video sequence, wherein the bitstream is decodable by:
- determining, for the video sequence, a maximum transform size in luma samples;
- and
- determining whether subblock transform (SBT) is allowed for a CU of the video sequence,
- wherein the determining of whether the SBT is allowed for the CU is based on a comparison of a size of the CU to the maximum transform size in luma samples.
Dependencies are inferred from the claim text.