Patent ID: 8891622
Filing Date: 2014-11-18
Classification: H04N

Abstract:
1. A motion picture coding apparatus including at least one processor and a non-transitory computer readable recording medium storing instructions executable by the at least one processor, the instructions configured to cause the at least one processor to perform a motion picture coding method when executed, comprising: dividing an image into plural blocks and coding the plural blocks of the image; determining, for each of the plural blocks, a coding mode to be used in the coding; determining, for each of the plural blocks, a position of coefficients to be replaced by “0” among coefficients of direct current components after undergoing orthogonal transformation or quantization obtained for each of the plural blocks by the coding according to the coding mode determined for each of the plural blocks based on rate information; determining whether a to-be-processed block of the plural blocks is a first block for which referring to pixel values of an upward adjacent block in the coding is not allowed; changing, for coefficients direct current components after undergoing orthogonal transformation or quantization of the to-be-processed block determined as the first block, the determined position of coefficients to be replaced by “0” to reduce a number of coefficients to be replaced by “0”; and replacing the coefficients of direct current components after undergoing orthogonal transformation or quantization of the to-be-processed block determined as the first block by “0” based on the position changed by the changing.