| 摘要 |
The present technology relates to an encoding device and encoding method, and a decoding device and decoding method, whereby encoding efficiency when performing intra prediction can be improved. A candidate prediction image generating unit 41 performs intra prediction processing as to a PU of an image to be encoded, in multiple intra prediction modes, and generates a prediction image. A prediction mode determining unit 43 determines an optimal intra prediction mode of the PU for intra prediction processing. A MostProbableMode generating unit 51 generates a MostProbableMode using a peripheral optimal intra prediction mode. A difference mode generating unit 52 generates optimal difference intra prediction mode information indicating the difference between a number of the optimal intra prediction mode of the PU for intra prediction processing and the MostProbableMode. An intra skip determining unit 45 transmits optimal difference intra prediction mode information. The present technology can be applied to an encoding device, for example.
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