Study And Realization Of Multiplexing PS To One TS

As the digital television becomes a commonplace in our country,the traditional analog television will fade away from the history stage.The manufacture of the source file of digital TV will become very important.Most of the digital TV format use MPEG2's TS as source file,SO how to use the existed resource to make TS will be a very meaningful thing .In this paper,we introduce the PS,TS,PAT,PMT,SDT's format and fuction in details .Then we raise a way to transfer multiple PS to one TS.This is to make use of the common point between PS and TS that they are both based on PES.We get PES from PS,and then transfer PES to TS.In this process,User can set the rate of TS,each PID of PS program in TS,program name,program provider and program number. In the process of multiplexing,the key is how to make each paogram streams arrive at the decoder on time.Then the decoder can decode the video and audio information in right way.I this paper,we introduce the concept of"rate adjust",that is to make the data size equal the value we set in advanced by insert null bag.This setted value euquls time interval multiply the rate of TS.The process of"rate adjust"realized how to map SCR of PS to the TS.So long as the SCR of PS is synchronization,the TS will be.that is to say the video and audio are synchronization.then we multiplex PSes to one TS on condition that we do not change the content of PES.In this paper we did the work as follows:abstracting of PES from PS,creating TS bag,creating PAT table,creating PMT table, creating SDT table, creating PCR bag, multiplexing arithmetic's realization.The program is coded by VC++6.0 in WINDOWS platform.We test our TS with a PC of P4, HS7807 DVB-C ,HS7808 DVB-T digital TV modulator and a digital TV Set-Top Box(STB) in ChongQing modern Video and Audio Techonology Company.At the same time we also test it in ChangHong Technology Center by their DTV network server.the video and audio is clear that proved the output of the test is successful.