The Key Technology For Streams Multiplexing Based On High Definition Video Compression Coding

The paper focuses on the multi-streams multiplexing key technique for high definition video compression coding data streams transmission system.In order to solve the difficulties and challenges further,the paper emphasizes on the reliable streams multiplexing technology for high definition video compression coding data,and the bidirectional streams effective multiplexing method between high definition video compression coding data and IP data.First of all,the background and significance of high definition or ultra high definition video technology are introduced briefly;its development course,application situation and future trend are all summarized.Moreover,the bottleneck problems have all been illustrated deeply,including a more efficient spectrum utilization,a bigger transmission capacity,a higher transmission reliability,as well as a diversity transmission business.Subsequently,the existing typical multi-program streams multiplexing schemes and corresponding key technologies are described tersely.Then its comprehensive performance is debated on the basis of 3 evaluation criteria,including efficiency,rate and complexity.Based on the above analysis and discussion,a new reliable scheme suitable for multi streams multiplexing is proposed,and its principle structure,process steps,as well as key system modules are followed illustrated in detail.In particular,considering the program reference clock jitter,resulting from variable delay,a new more simple amendment method,based on PCR jitter amplitude judgment,is developed.The new method can take optimization and improvement measures to settle PCR offset accumulation and reduce corresponding algorithm complexity problems.Finally,the bidirectional multiplexing principle strategies between high definition video data and IP data is firstly introduced.Next now available scheme technologies are explored thoroughly.Further,aimed at their shortages,a new efficient bidirectional streams multiplexing method is recommended,which can succeed in accomplishing conversion quickly between TS and IP format.For a higher IP address availability and a lower package cost,two improvement strategies are adopted to save IP space and improve transmission efficiency.One is IP address reuse depending on program number,and another is encapsulation protocol header redundancy compression.While,in terms of IP over TS,so as to overcome the lower stream conversion efficiency,and complicated operation,as well as higher implementation complexity weaknesses,The TS header field,which are 4 bytes,is appropriately changed,aiming to achieve IP mapping directly and reduce package overhead.At last,the whole proposed schemes' performance are well evaluated based on MATLAB simulation platform.