Expected Distortion of Dct-Coefficients in Video Streaming over Unreliable Channel
نویسندگان
چکیده
The Recursive Optimal per-Pixel Estimate (ROPE) algorithm allows the encoder to estimate the pixel-bypixel expected distortion of the decoded video sequence due to channel loss. The algorithm requires in input an estimate of the packet loss rate and the knowledge of the error concealment technique used at the decoder with no need to perform any comparison between original and decoded frames. Although the ROPE algorithm computes the expected distortion in the pixel domain, in some applications it is important to have access to the expected distortion in the DCT domain, e.g., for an accurate allocation of the redundancy bits in error-resiliency schemes. This paper presents the extension of the ROPE algorithm in the transform DCT domain that allows estimating the expected distortion of the decoded video sequence for each DCT coefficient.
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