A Modified Method for Multiple Description Coding using Quincunx Subsampling

Multiple description coding, is a method of compressing a multimedia content into two or more descriptions. Each description has a controlled amount of redundancy, so that the content can be recovered even if one of the descriptions is lost. Also the descriptions can take different routes to the destination when they are transmitted from the source to the destination. Quincunx subsampling is a better method of subsampling than the normal subsampling. In this paper an image is quincunx subsampled to make two descriptions. The two descriptions are compressed by a method used to compress the green component of the CFA image separately. In this, side information about the other subsample is not needed because there are interpolation methods available to interpolate the quincunx subsampled image with greater PSNR. The decompression of each description is a lossless method so the quality of the image depends on the interpolation method. It is found that the decompressed image is infinity of greater than 30. Keywords— Multiple Description Coding; CFA image; Quincunx Subsampling; Interpolation; lossy and lossless compression