Image processing apparatus and method

摘要

An image processing apparatus and a method capable of performing a quantization process or an inverse quantization process more suitable for contents of an image. A lossless decoding unit decodes coded data read from an accumulation buffer at a predetermined timing. A sub macroblock inverse quantization unit obtains a quantization value for each sub macroblock by using a quantization parameter supplied from an inverse quantization unit and returns the same to the inverse quantization unit. The inverse quantization unit inversely quantizes a quantization coefficient obtained by decoding by the lossless decoding unit by using the quantization value for each sub macroblock supplied from the sub macroblock inverse quantization unit.

主权项

1. An image processing apparatus, comprising:
circuitry configured to
set, on the basis of a value indicating a minimum coding block size for which a difference quantization parameter is set, a quantization parameter used when image data is quantized for a current coding block;quantize the image data to generate quantized data by using the quantization parameter; andcode the generated quantized data in a unit including a hierarchical structure to generate a coded stream.