mp3 vs wave [英] mp3 vs wave

问题描述

我们知道mp3文件的大小比wave文件小得多，我想知道它的原因.
mp3文件由帧数组成，每个帧都有一个包含帧信息的标头，而wave文件没有帧，只有一个riff，fmt和data部分.因此，wav文件的大小必须比mp3文件小，但为什么不这样呢?

同样，一个mp3文件由一个ID3标签和随后的帧组成.然后，如何识别mp3文件的第一帧和最后一帧的开始? 有没有计算公式，或者ID3标签包含一些尺寸字段?

如何知道ID3标签中包含的filds，因为我发现mp3文件的标签字段因文件而异...
如何知道哪些字段包括在内，哪些字段被忽略了?


请帮助我理解所有这些..

As we know that a mp3 file has got much smaller size as compared to wave file, I want to know the reason for it.

The mp3 file consists of number of frames and each frame has got a header which consists the frame information whereas a wave file has got no frames but a single riff ,fmt and data sections. So the size of a wav file must be smaller as compared to mp3 file but why is it not so??

Again a mp3 file consists of a ID3 tag followed by the frames.Then How to identify the starting of first frame and last frame of a mp3 file???
Is there any formula to calculate it or does the ID3 tag contains some size field??

How to know the filds that are included in an ID3 tag because I have found that the tag fields of a mp3 file varies from file to file...
How to know which fields are included and which are neglected??


Please help me in understanding all these..

推荐答案

任何mp3文件都使用有损压缩算法，因此其大小比wave小.希望此 [此 [ ^ ]可能也有帮助.

Any mp3 file makes use of a lossy compression algorithm, resulting in smaller size than wave. Hope this [^]link helps.

This[^] might help too.

简短答案:MP3使用压缩功能.标准波形格式也没有，尽管也有压缩波形.

Short answer : Mp3 uses compression. The standard wave format does not although there are compressed wave formats too.

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