【摘要】 提出了一种新的图像编码方案 .对子波变换后的系数进行变系数定长编码 ,由符号概率表生成字典 ,并用类似算术编码的方法进行符号串和字典中码字的映射 ,同时采用一系列的纠错方法以进一步提高方案的抗误码能力 .模拟结果表明 ,该方案与其他方案相比 ,具有压缩比高 ,抗误码能力强等优点 .更多还原

【Abstract】 A new wavelet based image coding scheme was proposed. The Variable Coefficient Fixed Length(VCFL) Coding method was used to code the wavelet subband coefficients of the image. The codebook was obtained from symbol probability. By a way similar to Atithmetic Coding, a bunch of symbols was mapped to the code in the codebook. Several error concealement methods were also adopted to improve the robustness. Simulation results show that our new scheme has higher compression ratio and robustness.更多还原