Image processing apparatus and method

摘要

This technique relates to an image processing apparatus and a method for improving the coding efficiency for a quantization parameter.;Provided are a predicted quantization parameter setting unit for setting a predicted quantization parameter for a current coding unit by using multiple quantization parameters which are set for multiple surrounding coding units located around the current coding unit which is target of coding processing, and a difference quantization parameter setting unit for setting a difference quantization parameter indicating a difference value between the quantization parameter which is set for the current coding unit and the predicted quantization parameter which is set by the predicted quantization parameter setting unit. The present disclosure can be applied to, for example, an image processing apparatus.

主权项

1. An image processing apparatus for encoding image data, the image processing apparatus comprising:
a predicted quantization parameter setting unit including circuitry configured to set, in a condition that a current coding unit is located at the front of a current largest coding unit, a quantization parameter of a coding unit located at the last of the largest coding unit immediately before as a predicted quantization parameter for the current coding unit; a quantization parameter setting unit including circuitry configured to set a current quantization parameter by adding a difference quantization parameter to the predicted quantization parameter which is set by the predicted quantization parameter setting unit; and inverse quantization unit including circuitry configured to inversely quantize quantized data using the current quantization parameter.