Patent ID: 11876990
Assignee: MEDIATEK INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A video residual decoding apparatus for applying residual decoding to a transform block that is divided into sub-blocks, comprising:
a residual decoding circuit, arranged to enter a coefficient loop for decoding one or more syntax elements at each of coefficient positions within a sub-block that has at least one non-zero coefficient level, wherein the sub-block is included in the transform block, the coefficient loop comprises a plurality of decoding passes arranged to operate in sequence, the plurality of decoding passes comprise one decoding pass and at least one other decoding pass prior to said one decoding pass, and the residual decoding circuit does not enter the coefficient loop for decoding another sub-block included in the transform block before the plurality of decoding passes of the coefficient loop for decoding the sub-block included in the transform block are completed; and
a storage device;
wherein during said at least one other decoding pass, the residual decoding circuit is arranged to record side information in the storage device, where the side information is indicative of specific coefficient positions at which specific syntax elements need to be decoded in said one decoding pass; and
wherein during said one decoding pass, the residual decoding circuit is arranged to refer to the side information recorded in the storage device for selecting the specific coefficient positions within the sub-block, and decoding the specific syntax elements at the specific coefficient positions, respectively.