Patent ID: 9264718
Filing Date: 2016-02-16
CPC Classification: H04N

Claim Text:
1. An image encoding method, comprising: determining, by an intra prediction unit, a prediction mode for image or video data; generating, by the intra prediction unit, a prediction block; transforming and quantizing, by a transform/quantization unit, a residual block to generate a quantized block; and entropy-coding, by an entropy coder, coefficients of the quantized block, wherein, when a size of the quantized block is equal to 8×8, the quantized block are divided into a plurality of subsets, and the plurality of subsets are scanned using a scan pattern determined according to the intra prediction mode, wherein a scan pattern for scanning non-zero coefficients of each subset is same with the scan pattern for the plurality of subsets, wherein a scan pattern for scanning flags indicating non-zero coefficients of each subset is same with the scan pattern for scanning non-zero coefficients of each subset.