Patent ID: 11936884
Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. One or more non-transitory computer-readable media having stored thereon compressed data as part of a bitstream, the compressed data including a value of a coded block flag (“CBF”) for a root transform unit (“TU”) of a residual quadtree for a given coding unit (“CU”) of video content, the value of the CBF for the root TU being signaled for the given CU, and wherein the compressed data is produced by encoding the video content with operations that include, for the given CU:
determining that the root TU of the residual quadtree for the given CU includes residual information;
determining the value of the CBF for the root TU, the value of the CBF for the root TU indicating the root TU includes residual information;
signaling, as part of the compressed data, the value of the CBF for the root TU;
determining whether to split the root TU into multiple nodes, each of the multiple nodes being associated with a block, including determining that a predetermined condition is satisfied, the predetermined condition relating to a predetermined maximum TU size, wherein the determining that the predetermined condition is satisfied includes determining that log2(a TU size)<log2(the predetermined maximum TU size);
determining values of multiple preceding CBFs for multiple blocks, the values of the multiple preceding CBFs indicating the multiple blocks, respectively, do not include residual information; and
based at least in part on the values of the multiple preceding CBFs indicating the multiple blocks, respectively, do not include residual information, determining a value of a CBF for a given block, the value of the CBF for the given block indicating that the given block includes residual information, and refraining from signaling, as part of the compressed data, the value of the CBF for the given block.