Patent ID: 9191673
Filing Date: 2015-11-17
Classification: H04N

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