Patent ID: 7933459
Filing Date: 2011-04-26
Classification: H04N

Abstract:
1. A data processing apparatus for performing a second quantization on data to be processed, the data to be processed obtained by performing inverse quantization after performing a first quantization by a first quantization scale, comprising: a quantization scale generation means for generating a second quantization scale Q(i) based on the first quantization scale for the data to be processed, the data to be processed corresponding to image data including blocks of data MBm(i) and MBm(i+1), and the first quantization scale including scales Qm(i) and Qm(i+1), wherein blocks MBm(i) and MBm(i+1) are subjected to the first quantization based on the first quantization scales Qm(i) and Qm(i+1); and a quantization means for performing the second quantization on the data to be processed based on the second quantization scale generated by the quantization scale generation means, wherein the quantization scale generation means calculates the second quantization scale Q(i) based on the scales Qm(i) and Qm(i+1), and calculates an additional second quantization scale Q(i+1), and wherein the quantization means performs the second quantization on the block data MBm(i) based on the second quantization scale Q(i) calculated by the quantization scale generation means and performs the second quantization on the block data MBm(i+1) based on the additional second quantization scale Q(i+1).