An Improved Detection Method for Zero Quantized Blocks on H.264/AVC
Bo-Jhih Chen and Shen-Chuan Tai
Institute of Computer and Communication Engineering,
Department of Electrical Engineering, National Cheng Kung University, Tainan City 701, Taiwan (R.O.C.)
Email: [email protected] and [email protected]
Abstract
An improved detection method for observing the zero quantized block (ZQB) is proposed. The additional computational cost would be reduced due to 4× 4 ZQBs being detected prior to the 4 × 4 DCT forward transform and the quantization processes on H.264/AVC video coder, we report a new criterion based on the statistical analysis by considering the energy conservation theorem. Experiments are also carried out to validate the present method.
The results indicate that the present method has both a better detection rate with the negligible PSNR degradation and a reasonable error and/or false detection comparing to the prevalent methods. Particularly, computation savings are obtained as well.
Index Terms zero quantized block; DCT; energy conservation; H.264/AVC;
