The Hardware Platform Design Based On DM6446 For Cable Set-top-box To Receive HDTV

Davinci technology has been changing the way to develop digital video application, it provides all tools needed by engineers, including processor, development tools, open system, multimedia codec software and project support. Especially, Davinci technology enables developers to step beyond the specific and technical details of digital video, no longer must a developer be aware of the details. So the developers can focus their development efforts where they can add the most value and creat a whole new level of innovation.The Cable HDTV Set-Top-Box based on DM6446 can decode many different multimedia formats, it is more flexible than the HDTV STB design by ASICs. Our system can realize MPEG2 HD video decoding, demuliplexing, MPEG2,MPEG4,H.264 SD video decoding, AAC,MPEG2 audio decoding and H.264 SD video decoding. They are all realized by software.This dissertation finish the design and implementation of the HD Set-Top-Box hardware platform, including DDR2 memory, ATA harddisk, EMIF, TS capture, VPBE, HDTV display, DVI transmit and so on. Schematic is design by using Protel 99SE software and the PCB is design by using PADS2005 software. Some knowledgement and technique about high speed PCB design is used in this system, because the hardware platform is complex. Besides the hardware, I also program much driver software for debugging, and build an environment for embeded Linux development. In the last of the dissertation, I propose some way to upgrade the hardware platform of the system.