Image processing device and method

摘要

The present disclosure relates to an image processing device and method that enable suppression of an increase in the amount of coding of a quantization matrix.;An image processing device of the present disclosure includes an up-conversion unit configured to up-convert a quantization matrix limited to a size less than or equal to a transmission size that is a maximum size allowed for transmission, from the transmission size to a size that is identical to a block size that is a processing unit of quantization or dequantization. The present disclosure is applicable to, for example, an image processing device for processing image data.

主权项

1. An image processing device comprising:
circuitry configured to
decode a bit stream including image data and a first 8×8 quantization matrix corresponding to an 8×8 transform unit, a second 8×8 quantization matrix associated with a 16×16 quantization matrix corresponding to a 16×16 transform unit, and a third 8×8 quantization matrix, different from the second 8×8 quantization matrix, associated with a 32×32 quantization matrix corresponding to a 32×32 transform unit to generate quantized image data; set a 16×16 quantization matrix from the second 8×8 quantization matrix in a case where an inverse orthogonal transform is to be performed using the 16×16 transform unit and set a 32×32 quantization matrix from the third 8×8 quantization matrix in a case where the inverse orthogonal transform is to be performed using the 32×32 transform unit; and dequantize the generated quantized image data using the set 16×16 quantization matrix or the set 32×32 quantization matrix.