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《Journal of University of Electronic Science and Technology of China》 2004-03
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A Real Time Intra-Update Method Based on Rate-Distortion Optimization

Peng Qiang,Deng Yun,Zhu Changqian (School of Computer and Communications Engineering, Southwest Jiaotong University Chengdu 610031)  
A rate-distortion computation model is established for approximately estimating the total quantization distortion of one frame, and a new real time Intra-update criterion is proposed. Through comparing the increased quantization distortion and reduced propagation distortion by intra-updating, the encoder can quickly decide which macroblock need to be intra-updated. Simulation results show that the performance of proposed algorithm, which reduces the computational complexity significantly, achieves the same or even better gains over traditional rate-distortion based Intra-update methods.
【Fund】: 铁道部科技研究开发项目(2003X040-A)
【CateGory Index】: TN919.81
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