用来评估压缩算法性能的不同参数是什么? [英] which is the different parameter used to evaluate for performance of compression algorithm?

问题描述

请给我一些参数，用于评估压缩算法的性能

告诉我如何用它来评估...

请帮助
感谢

please give me some parameter which is used to evaluate the performance of compression algorithm

tell me how it is used to valuate...

please help
thanks

推荐答案

给定一组合适的输入数据，基本上有以下参数:compression ratio(size_after_compression/size_before_compression)以及compression和(字节/秒).

Given a set of suitable input data, there are essentially these paramenters: the compression ratio (size_after_compression/size_before_compression) and both the compression and decompression speed (bytes/sec).

涉及无损压缩(即压缩文件进行存储)时，要点是压缩文件大小除以原始文件大小，然后是压缩所需的时间.
有时会使用有损压缩，例如jpg(用于图像)或mp3(用于音频).在这里，需要进行损耗的测量，但这很难描述，因为最终结果是由人类用户评估的，该用户必须看到漂亮的图片或听高保真"音乐.

When it comes to loss-less compression (i.e. compressing a file for storage), then the main point is compressed file size divided by original file size, followed by the time required for compression.
Sometimes, a lossy compression is used, e.g. jpg for images, or mp3 for audio. Here, a measurement for loss is required, but that is harder to describe, because in the end the result is evaluated by a human user who has to see a nice picture or listen to "high-fidelity" music.

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