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Design and Implementation of Low Bit-rate Real-tlme Video Encoder Based on DSP |
Liu Shao-hua; Xiong Zhi-hui; Bao Wei-dong; Zhang Mao-jun |
School of Information System and Management, National University of Defense Technology, Changsha 410073, China |
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Abstract A low bit-rate real time video encoding system on MPEG using DSP TMS320DM642 as core processor is designed. The main features are: Diamond Search is integrated with Center-based Three-step Search (CTSS); A new method for pre-determination of all-zero blocks is proposed; The encoder is specially optimized for DSP. Experimental results show that the search method in this paper is better than CTSS. The pre-determination of all-zero blocks reduces operation and bit rate efficiently with little image quality decrease.
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Received: 09 October 2006
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