Digital Video/Audio NR+RR Monitoring System Based on Motion Compensated Interframe/Intraframe Objective Parameters

摘要

We have developed Digital Video/Audio Monitoring System. The basic component is 1 U rack size unit, which has one video and two audio inputs and data outputs. This unit can monitor video/audio quality with No Reference (NR) signal based on the MC interframe / intraframe objective parameters, and results are clearly displayed at each local point. Further, with use of NR monitoring results, this unit can also produce essential signals as the Reduced Reference (RR) signal for video/audio quality relative measurement, which can be coded with very limited number of bits (less than 64kbits/s). By connecting these units via common network such as LAN and IP, RR signals at remote monitoring points can be gathered into a central control site. At this site, each RR signal, which corresponds to each monitoring point are compared against each other and quality parameters for each video link can be easily calculated at real-time base: This is accomplished by the sample-less MSE approximation algorithm. By the quality parameters, we can immediately locate the problem link in case of service failure. In addition, we can accumulate data related to video/audio quality by logging parameters for long period.