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首页> 外文期刊>IEEE Transactions on Communications >Predictive ordering technique and feedback transform coding for data compression of still pictures
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Predictive ordering technique and feedback transform coding for data compression of still pictures

机译:静态图像数据压缩的预测排序技术和反馈变换编码

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摘要

A picture data compression method consisting of a hybrid cascade having four processing stages is presented. The processing stages are: predictive ordering technique (POT), feedback transform coding (FTC), vertical subtraction of quantized coefficients (VSQC), and predictive coding refinements in the signal space consisting of either overshoot suppression (OS) as a first variant or hybrid block truncation coding (HBTC) as a second one. Each of these stages is described, and reconstructed pictures are presented with their coding fidelity performances (mean square quantization error, mean absolute error and signal-to-noise ratio), using as test pictures a portrait and a LANDSAT image. It is shown that good quality images at low bit rates (0.55 to 1.1 bits/pixel) have been obtained.
机译:提出了一种由具有四个处理阶段的混合级联组成的图像数据压缩方法。处理阶段包括:预测排序技术(POT),反馈变换编码(FTC),量化系数的垂直减法(VSQC)以及信号空间中的预测编码细化,其中包括作为第一变体的过冲抑制(OS)或混合信号块截断编码(HBTC)作为第二个。描述了这些阶段中的每一个阶段,并使用肖像和LANDSAT图像作为测试图像,以其编码保真度性能(均方量化误差,平均绝对误差和信噪比)展示了重建的图像。显示出已经获得了低比特率(0.55至1.1比特/像素)的高质量图像。

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