The Real-Time Parallel Video Decoder Considered on the Complexity and Delay of Error Correcting Decoding

概要

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In this paper, a new video decoding scheme integrating error correcting decoder is proposed. In video data transmission, some error correcting code should be equipped to keep video data quality. But in many cases it would need much complex calculation and delay at the decoder when high quality of video data is required. Then, we prepare the two error correcting decoders against one error correcting encoder, where they are different in the delay and the reliability. Due to reconstructing output frame and reference frame separately with two outputs, less delay and less degradation is accomplished. The video quality is analyzed with the 3-D DPCM parallel decoder. Here we show that the degradation of output frame is minimized when no error exists in the reference frame. And we evaluate the simulation results using concatenating code as an example of two output error correcting decoder. Here we show that it is possible to maintain the video quality and achieves graceful degradation in low channel energy, especially in Rayleigh fading channel. Furthermore in the subjective evaluation, we can confirm that the degradation seems to less impression than general decoding in the same PSNR.
社団法人電子情報通信学会の論文
2002-02-01