Image-encoding apparatus and method outputting control parameter for controlling structure of moving image data encoded group in encoding unit based on index value

摘要

An image-encoding apparatus includes an encoding unit that performs intra-frame encoding or inter-frame encoding on each picture of moving image data to output encoded data that includes an encoded group that includes at least one encoded picture, an encoding distortion calculating unit that calculates an amount of encoding distortion, an inter-frame correlation calculating unit that calculates a correlation between frames in the moving image data, an index value calculating unit that calculates an index value that is used to determine a structure of the encoded group based on the correlation, condition data, and the amount of encoding distortion, and an encoding control unit that outputs a control parameter for controlling at least the structure of the encoded group in the encoding unit based on the index value.