Zhou Wei-hua, Zhu Xin-ning, Wu Mu-qing, Ding Wei. A Scheduling Algorithm for Input Queued Switch with Guaranteed Fairness[J]. Journal of Electronics & Information Technology, 2005, 27(3): 341-345.
Citation:
Wang Chunning. AN ADAPTIVE PREDICTION DPCM WITH SPATIAL FEEDBACK NOISE SHAPING FOR IMAGE CODING[J]. Journal of Electronics & Information Technology, 1997, 19(5): 625-630.
Zhou Wei-hua, Zhu Xin-ning, Wu Mu-qing, Ding Wei. A Scheduling Algorithm for Input Queued Switch with Guaranteed Fairness[J]. Journal of Electronics & Information Technology, 2005, 27(3): 341-345.
Citation:
Wang Chunning. AN ADAPTIVE PREDICTION DPCM WITH SPATIAL FEEDBACK NOISE SHAPING FOR IMAGE CODING[J]. Journal of Electronics & Information Technology, 1997, 19(5): 625-630.
Based on human visible performance an APICM method is proposed.The core of the method is that the method can suppresses the reconstruction noise in frequency bands where it is most visible in order to achieve spatial reconstructing noise shaping by using noise feedback filter.Meanwhile, some noises are added into frequency bands where it is less visible in order to achieve noise smooth of overall reconstructing image. Therefore,the coarser nonuniform quantizer(the smaller number of quantization levels)can be used in order to achieve the better reconstruction image.The method not only has low designing complexity but only has a performance of noise shaping better than that of a standard DPCM system.
Spang H A, Schultheiss P M. Reduction of quantization noise by use of feedback. IRE Trans. on Commun. Syst., 1962, CAS-10(12): 373-380.[2]Robson G J. Visual and temporal contrast sensitivity functions of the visual system[J].J. Opt. Soc. Am.1966, 56(1):1141-1142[3]Pirsch P. Design of DPCM quantizers for video signals using subjective tests. IEEE Trans. on Commun., 1981, COM-29(7): 990-1000.[4]Manos J L, Sakrison D J. The Effects of a visual fidelity criterion on the encoding of images. IEEE Trans. on Inform. Theory, 1974, IT-20(4): 525-536.[5]Girod B. Reconstruction Noise Shaping in the Context of Predictive TV Signal Coding. North Holland: IEEE/Elsevier Science Publishers B. V., 1984, 711-717.[6]Pirsch P. Stability conditions for DPCM coder. IEEE Trans. on Commun., 1982, COM-30(5): 1174-1184.[7]王春宁.多媒体通信中MPEG视频压缩技术的研究.第七届全国语音图象与通信信号处理学术会议,西安:1995-10, 284-287.
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