Image encoding method, image decoding method, image encoding device, image decoding device, and image encoding/decoding device

摘要

An image encoding method comprises: a prediction step (S6001) to generate a prediction block; a calculation step (S6002) to calculate a residual block; a transformation/quantization step (S6003) to calculate a quantized coefficient by transforming and quantizing the residual block; an inverse transformation/inverse quantization step (S6004) to calculate an encoded residual block by inverse quantizing and inverse transforming the quantized coefficient; a generation step (S6005) to generate a provisional encoded block; an assessment step (S6006) to assess whether or not an offset process is required, and generate first flag information indicating the result of the assessment; an offset processing step (S6012) to execute an offset process with respect to the provisional encoded block, when the offset process is assessed to be required; and a variable length encoding step (S6011) to variable-length encode the quantized coefficient and the first flag information.