MODIFICATION TO BLOCK SIZE FOR TRANSFORM MODE IN DISPLAY STREAM COMPRESSION

摘要

Methods and apparatuses for modification to block size for transform mode in display stream compression are disclosed. In one aspect, the method involves selecting a current block and a next block of video data, calculating a first rate-distortion (RD) cost for coding the current and next blocks with a larger block size transform (LBT) mode, and calculating a second RD cost for coding each of the current and next blocks with another coding mode different from the LBT mode. The method may further involve determining whether the first RD cost is less than a sum of the second RD costs for the current and next blocks and coding the current and next blocks with the LBT mode in response to the first RD cost being less than the sum of the second RD costs for the current and next blocks.

主权项

1. A method operable by a video coding circuit for selecting a coding mode from a plurality of coding modes for coding video data, the method comprising:
selecting a current block and a next block of the video data; calculating a first rate-distortion (RD) cost for coding the current and next blocks with a larger block size transform (LBT) mode; calculating a second RD cost for coding each of the current and next blocks with another coding mode different from the LBT mode; determining whether the first RD cost is less than a sum of the second RD costs for the current and next blocks; and coding the current and next blocks with the LBT mode in response to the first RD cost being less than the sum of the second RD costs for the current and next blocks.