TI DM355 摄像监控方案(一).doc

TI公司的DM355数码相机，摄像，监控方案的介绍 TI 公司的DM355是高度集成可编程平台,适用于数码相机,数码相框,IP安全照相机,4路数字视频摄影机,视频门铃应用和其它低成本手提视频应用. DM355处理器核是ARM926EJ-S RISC处理器,集成了高性能的MPEG4 HD (720p)编译码器(CODEC)和JPEG编译码器(CODEC),高达5000万象素/秒. DM355具有高质量,低功耗和非常低的价格.本文介绍了DM355达标主要特性,方框图, 采用TMS320DM3x的IP 照相机参考设计软件框图以及DM355IPNC-TC922, DM355IPNC-VCA1和DM355IPNC-MT5 IP 照相机参考设计方框图.The DM355 is a highly integrated, programmable platform for digital still camera, digital photo frames, IP security cameras, 4-channel digital video recorders, video door bell application, and other low cost portable digital video applications. Designed to offer portable video designers and manufacturers the ability to produce affordable portable digital video solutions with high picture quality, the DM355 combines high performance MPEG4 HD (720p) codecs and JPEG codecs up to 50M pixels per second, high quality,and low power consumption at a very low price point. The DM355 also enables seamless interface to most additional external devices required for a complete digital camera implementation. The interface is flexible enough to support various types of CCD and CMOS sensors, signal conditioning circuits, power management, DDR/mDDR memory, SRAM, NAND, shutter, Iris and auto-focus motor controls, etc.The DM355 processor core is an ARM926EJ-S RISC processor. The ARM926EJ-S is a 32-bit processor core that performs 32-bit and 16-bit instructions and processes 32-bit, 16-bit, and 8-bit data. The core uses pipelining so that all parts of the processor and memory system can operate continuously. The ARM core incorporates:A coprocessor 15 (CP15) and protection moduleData and program Memory Management Units (MMUs) with table look-aside buffers.Separate 16K-byte instruction and 8K-byte data caches. Both are four-way associative with virtual index virtual tag (VIVT).DM355 performance is enhanced by its MPEG4/JPEG coprocessor. The MPEG4/JPEG coprocessor performs the computational operations required for image processing; JPEG compression and MPE