INFORMATION PROCESSING APPARATUS AND METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To set a quantization step corresponding to a target code amount with high precision.

SOLUTION: A coefficient holding unit 302 of a rate control unit 112 stores a plurality of coefficient sets corresponding to resolutions of motion images and encoding methods of frames. A coefficient selector 301 selects a coefficient set corresponding to the resolution of a motion image to be encoded and an encoding method of a frame to be encoded from the coefficient holding unit 302. A feature quantity extracting unit 304 extracts a feature quantity of the frame to be encoded. A QR curve generator 303 generates a function indicative of the relation between a quantization step and a generated code amount from the selected coefficient set and feature quantity when subjecting the frame to be encoded to inter-frame predictive encoding. A model type Q determining unit 300 sets a quantization step corresponding to a target code amount for encoding of the frame to be encoded based upon the function when a QR curve generating means 303 generates the function.

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