SCAN REGION-BASED COEFFICIENT CODING IN AVS3

This paper describes transform coefficient coding using the scan region-based method adopted in the Draft Standard of the AVS3-phase2 specification. Transform coefficient coding in the scan region-based method encompasses the definition of the scan region, the coding scheme in the given scan region and the context model selection for the coefficients’ multi-layer level coding. Experimental results show that the proposed method improves coding efficiency on average by 2.84%, 1.73%, 1.42% BD-rate over AVS3-Baseline coefficient coding scheme in AI, RA and LD configurations, respectively.