Package Processor in Digital Video System Head-end
Jian Ge · China Cable Television · 2003
On the basis of MPEG-2 and DVB criteria, this paper, through analyzing the format of TS packet and information of TS stream, brings forward a feasible design of the package processor in the head-end of digital video system. The design is consistent with DVB definition. And the processor can transforms IP datagram to TS package stream transporting on MPEG-2 layer, raises the data transport rate up to the appointed and selects the programs. As for the way of eliminating PCR jitter, a new method that PCR is corrected two times is explicated, which applies to stream consisting of single or multiple programs and is easy to hardware realized. In addition, as for the processing of IP datagram, a new idea and method is proposed. The new TS packages transformed form IP datagram can form a new TS stream with its own PAT, PMT and NIT, other than being a program recomplexed into the original TS, Which can realize the easy drop/add. The whole design is simple and easy to realize, and the performance also satisfies the required. By simulating, the generated data has no difference with the original data by displaying.