Pnx1300-based Audio And Video And Audio Synchronization Realization

This thesis mainly introduced a real-time G.722 audio codec system as well as animplementation of audio-video synchronization based on Nexperia PNX1300multimedia DSPCPU.DVE-2, a stand-alone development card for PNX1300 digital media processorprovided the hardware platform in the design work. Software was designed with Clanguage.Firstly, a set of feasible project running on PNX1300 for real-time speechsampling, speech encoding, decoding and playing was carried out. The keytechnologies with real-time implementation of G. 722 speech encoder and decoder onPNX1300 was discussed. At the same time, some problems which were met in theprocess of specific realization are also discussed. In addition, the correspondingresolutions are brought forward in this paper.Secondly, an MPEG-4 encoding system was described. The audio-videosynchronization mechanism based on PNX1300 was also discussed.Finally, a remote multimedia monitoring system was built along with networkcommunication module and video module of my co-operators.Until now, the design work has been finished; the remote multimedia monitoringsystem has also been adopted in the real application.