Research On Stream Technic Of High Performance Multimedia Server

As the technology and application of DVB and HDTV developing, MPEG2 are used in more and more broad fields. But the lack of programs is still the key difficulty which HDTV and SDTV are facing. And also this affects the application of DVB and VOD system. This thesis intends to solve the problem above. This research accomplished changing the content of DVD into programs accord with MPEG2 TS. For details below:1) Video changed from MPEG2 PS to MPEG2 TS2) Audio of NTSC format that can not be decoded by STB could be changed from Dolby ACS coding standard to MPEG1/2 Layerll standard, and packed into MPEG2 TS format3) Well synchronized with audio and video by a new arithmetic "successive time stamp"This thesis made a introduction of MPEG2 standard in detail;discussed the system timing model;indicated the key during the transforming of video and audio;especially explain how to deal with the PCR. The most important of all, it brought forward a new arithmetic of synchronization of audio and video.This project achieved offering programs for VOD server. It adopted high definition DVD for source; changed video and audio information to MPEGII TS format;storaged information in disk cluster;actualized share used for DVD-VOD and IP-VOD. In every aspects it involved, it reached a high and embedded level.