TWO LEVEL LAST SIGNIFICANT COEFFICIENT (LSC) POSITION CODING

摘要

In some examples, a video coder employs a two-level technique to code information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients. For example, a video coder may code a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, and code a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC.

主权项

1. A method of decoding a block of transform coefficients associated with a block of video data during a video decoding process, wherein the block of transform coefficients includes a plurality of sub-blocks, the method comprising:
decoding information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients, wherein decoding the information comprises:
decoding a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, anddecoding a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC; and decoding the block of transform coefficients based on the position of the LSC.