To demonstrate to the user community that good quality video reception is attainable for transmission of video over wireless networks and to work with the Institute for Telecommunication Sciences (ITS) to carry out subjective video quality assessment tests and determine the minimum acceptable video transmission quality required to support the NIST Office of Law Enforcement Standards (OLES) public safety programs.
In this project, a new spatial/temporal interpolation algorithm for error concealment of ITU-T H.264 coded video has been developed for video quality assessment tests. The method aims at interpolating areas in the image, which have been affected by a loss of packet. The project consists of two parts; spatial (intraframe) error concealment (EC), and temporal (interframe) EC. The spatial EC is based on interpolating the missing regions in the frame by using pixels in the same frame. For spatial EC we have first considered bidirectional interpolation. To further improve the performance of the EC, we have developed an edge detection technique to aid the bidirectional interpolation. The edge-detection scheme is based on applying Hough transform to connect separated edge points along the direction of each detected straight line. The lines are used to divide the missing areas into different regions for interpolation.
Emerging & Mobile Network Technologies Group
gharavi [at] nist.gov