音频比特率
When converting audio files, it would make sense to avoid converting into a higher bitrate, as it is commonly understood that you can never recapture data lost in a previous conversion. Read on to see, however, when upgrading the bitrate is just what the digital doctor ordered.
转换音频文件时，避免转换为更高的比特率是很有意义的，因为通常都知道您永远无法重新捕获先前转换中丢失的数据。 请继续阅读，但是，升级比特率正是数字医生订购的。
Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites.
今天的“问答”环节由SuperUser提供，它是Stack Exchange的一个分支，该社区是由社区驱动的Q＆A网站分组。
问题 (The Question)SuperUser reader Cipricus poses the question:
超级用户读者Cipricus提出了一个问题：
When a certain file (mp4, flv, etc) has a 95 kbps audio bitrate – does it make sense outputing to a higher bitrate when converting to mp3 or other format (be it lossy or not)?
当某个文件(mp4，flv等)的音频比特率达到95 kbps时-在转换为mp3或其他格式(是否有损)时，以更高的比特率输出是否有意义？
Would this result in higher audio quality or just in a bigger file?
这会导致更高的音频质量还是只是更大的文件？
This is an important consideration; there’s no point in expanding the size of your files by X% if there isn’t an increase in audio quality.
这是一个重要的考虑因素。 如果音频质量没有提高，那么将文件大小扩展X％毫无意义。
答案 (The Answer)SuperUser contributor Linac offers a practical answer to his question. Despite what popular opinion would have us believe, there are practical reasons for upgrading the bitrate during conversion:
超级用户贡献者Linac为他的问题提供了实用的答案。 尽管流行观点会让我们相信，但在转换过程中提高比特率仍然有实际原因：
Yes, it might actually make sense if you are being forced to change formats.
是的，如果您被迫更改格式，这实际上可能是有道理的。
If you have a file with 95kbps in a highly efficient format, to retain the same quality, a relatively inefficient format as mp3 needs a higher bitrate.
如果您具有高效格式的95kbps文件，则要保持相同的质量，效率相对较低的mp3格式需要更高的比特率。
Of course you will never get anything back that was lost in the first place. On the contrary, encoding as mp3 will reduce the quality further. Every lossy format uses other means to reduce the amount of data that is stored, by (simplified) throwing away “unneeded” parts of the data. Round trip through a bunch of different formats and there won’t be much left …
当然，您永远都不会得到任何丢失的东西。 相反，编码为mp3会进一步降低质量。 每种有损格式都通过(简化)丢弃数据的“不必要”部分来使用其他方式来减少存储的数据量。 通过一堆不同的格式来回旅行，剩下的就不多了……
So if you want to stay as close a possible to the quality your file has now, you should chose a higher bitrate. 320kbps are probably wasted space, but for mp3 something in the order between 128 and 192 is needed to maintain – or at least come close to – the quality of a more efficient 95kbps file.
因此，如果您想尽可能地保持文件的质量，则应选择更高的比特率。 320kbps可能是浪费的空间，但是对于mp3，则需要保持128到192之间的顺序，以便保持(或至少接近)更高效的95kbps文件的质量。
Have something to add to the explanation? Sound off in the the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.
有什么补充说明吗？ 在评论中听起来不对。 是否想从其他精通Stack Exchange的用户那里获得更多答案？ 在此处查看完整的讨论线程。
翻译自: https://www.howtogeek.com/163743/does-it-make-sense-to-convert-an-audio-file-to-a-higher-bitrate/
音频比特率