Design And Implementation Of Outside-Disk Digital Video Recorder Subsystem On NVD Player

NVD (Next Generation Disc) is the optical disc technology of red laser to play HDTV programs. Holding the intellectual property right of NVD, which has many advantages such as perfect image, low cost, easer maintenance, enterprise of China can avoid the constrains of foreign patent. As an important expanded technology, the function of DVR (Digital Video Recorder) on NVD player (Next Generation Versatile of Disc player for HDTV) contains huge practical value.The hardware of outside-disk DVR subsystem consisted of USB storage device and NVD player. To design and implement the software module of outside-disk DVR subsystem, I have done a lot of research on the special hardware and software platform of NVD player and study deeply in MPEG2 encoding standards. The working principle of subsystem is of analyzing Packs in buffer, recording data to storage device as file through the high-speed USB2.0 interface before the program streams enter into hardware decoder and using human-machine interaction to show the recording status.The innovation of Outside-disk DVR subsystem on NVD player is that the subsystem record programs to mobile storage device outside while the market only has Inside-disk DVD player which could record programs to hard disk embedded in DVD player. It could not increase the hardware cost of NVD player, but it could enhance the ability of competition in market. Testing showed that the outside-disk DVR subsystem of NVD player is simple, user-friendly and has good stability and friendly human-machine interaction. Recorded files can play fluently in NVD player and PCs. All in all, the design achieves the desired objectives.