WinRar 使用了哪种数据压缩算法?
WinRar 使用哪种压缩算法?我正在研究文件压缩技术。那么哪种算法最适合音频/视频文件的压缩呢?
Which compression algorithm is used in WinRar? I am working on file compression techniques. So which algorithm will be best for compression of audio/video files?
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WinRar 的压缩算法是专有的。
对于常见的数据压缩,7zip 的性能优于 WinRar。
然而,对于音频/视频文件,常见的数据压缩技术如zip、winrar、7zip的性能较差。您应该使用特定的音频压缩技术,如 aac、amr、ogg 和特定的视频压缩技术,如 h.264、mpeg-4 等。这些特定的音频/视频压缩技术是有损的,因此比无损技术(如zip/winrar/7zip。
从香农创立的信息论的角度来看,普通数据、音频数据和视频数据的分布完全不同,因而合适的压缩技术也不同。
The compression algorithm of WinRar is proprietary.
For common data compression, 7zip performs better than WinRar.
However, for audio/video files, common data compression techniques like zip, winrar, 7zip have poor performance. You should use specific audio compression techniques like aac, amr, ogg, and specific video compression techniques like h.264, mpeg-4, etc. These specific audio/video compression techniques are lossy, thus gain much more compression ratio than lossless techniques like zip/winrar/7zip.
From the perspective of Information Theory, which founded by Shannon, the distribution of common data, audio data and video data are completely different, thus the proper compression techniques are different.