Multi-channel DVR System DSP Software Design Based On DaVinci-HD Processor

With the rapid development of the economic, people are gradually improving the safety of emphasis. At the same time, the video surveillance technology has experienced two stages:analog video surveillance and digital video surveillance. Now it gradually shifts to network surveillance and intelligent surveillance. Nowadays, DSP's high performance offers a platform for video surveillance. This paper designs the DSP software of multi-channel video surveillance system based of TI DaVinci-HD DM6467 platform.Chapter 1 gives the backgrounds of the software including video and audio compressing technology and the development of DSPs; it also introduces the purpose and the task of the software design;Chapter 2 discusses the audio and video codec algorithms in the DSP software, which use G.729A and H.264;Chapter 3 introduces the peripheral, DM6467 architecture, memory architecture of TI DaVinci-HD platform and its integrated development environment-CCS;Chapter 4 discusses the DSP software architecture in the DVR system, including all modules of encoder software and decoder software. It also discusses DVR system communication module, about messages, data interaction buffer and DDR memory map distribution;Chapter 5 discusses the intelligent surveillance system algorithm including camera tampering detection, on-focus detection, and then optimizes the algorithm by EDMA transfer and instruction optimization. At last tests the whole DVR system software and the system achieves the intelligent processing:occlusion detection and on-focus detection;Chapter 6 summarizes the design of the system and describes the advancing works to be accomplished.