| Original Paper |
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| A new all-zero 4×4 block determination rule for integer transform and quantization in AVS-M encoder |
| Liu Dong-Hua, Chen Yi-Qiang |
| Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract A new all-zero block determination rule was used to reduce the complexity of the AVS-M encoder. It reuses the sum of absolute difference of 4×4 block obtained from motion estimation or intra prediction as parameters so that the determination threshold need to be computed only once when quantization parameter (QP) is invariable for given video sequence. This method avoids a lot of computation for transform, quantization, inverse transform, inverse quantization and block reconstruction. Simulation results showed that it can save about 20%~50% computation without any video quality degradation.
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Received: 02 December 2005
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