US 11,722,678 B2
Method and apparatus for transform skip coefficients coding
Xiaozhong Xu, State College, PA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on May 20, 2021, as Appl. No. 17/325,606.
Claims priority of provisional application 63/070,023, filed on Aug. 25, 2020.
Prior Publication US 2022/0070471 A1, Mar. 3, 2022
Int. Cl. H04N 19/159 (2014.01); H04N 19/167 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/159 (2014.11) [H04N 19/167 (2014.11); H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
8. A computer system for video coding, the computer system comprising:
one or more computer-readable non-transitory storage media configured to store computer program code; and
one or more computer processors configured to access said computer program code and operate as instructed by said computer program code, said computer program code including:
receiving code configured to cause the one or more computer processors to receive video data having one or more coding coefficients;
performing code configured to cause the one or more computer processors to perform a flipping operation on the received video data based on selecting a scan region based coefficient coding definition to concentrate the coding coefficients in a scan region, wherein the flipping operation is one of a horizontal flipping operation, a vertical flipping operation, or a diagonal flipping operation, wherein intra prediction set is classified based on directionality, and wherein the horizontal flipping operation is performed based on the directionality of an intra prediction mode associated with the received video data being classified as a neighboring direction of a horizontal prediction direction, the vertical flipping operation is performed based on the directionality of the intra prediction mode associated with the received video data being classified as a neighboring direction of a vertical prediction direction, wherein the diagonal flipping operation is performed based on the directionality of the intra prediction mode associated with the received video data being classified as a neighboring direction of a diagonal prediction direction; and
decoding code configured to cause the one or more computer processors to decode the video data based on the selected scan region based coefficient coding definition.