音訊位元率

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.

轉換音訊檔案時，避免轉換為更高的位元率是很有意義的，因為通常都知道您永遠無法重新捕獲先前轉換中丟失的資料。 請繼續閱讀，但是，升級位元率正是數字醫生訂購的。

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“問答”環節由SuperUser提供，它是Stack Exchange的一個分支，該社群是由社群驅動的Q＆A網站分組。

問題 (The Question)

SuperUser reader Cipricus poses the question:

超級使用者讀者Cipricus提出了一個問題：

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)?

當某個檔案(mp4，flv等)的音訊位元率達到95 kbps時-在轉換為mp3或其他格式(是否有損)時，以更高的位元率輸出是否有意義？

Would this result in higher audio quality or just in a bigger file?

這會導致更高的音訊質量還是隻是更大的檔案？

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.

這是一個重要的考慮因素。 如果音訊質量沒有提高，那麼將檔案大小擴充套件X％毫無意義。

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:

超級使用者貢獻者Linac為他的問題提供了實用的答案。 儘管流行觀點會讓我們相信，但在轉換過程中提高位元率仍然有實際原因：

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，這實際上可能是有道理的。

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檔案，則要保持相同的質量，效率相對較低的mp3格式需要更高的位元率。

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 …

當然，您永遠都不會得到任何丟失的東西。 相反，編碼為mp3會進一步降低質量。 每種有損格式都通過(簡化)丟棄資料的“不必要”部分來使用其他方式來減少儲存的資料量。 通過一堆不同的格式來回旅行，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，如果您想盡可能地保持檔案的質量，則應選擇更高的位元率。 320kbps可能是浪費的空間，但是對於mp3，則需要保持128到192之間的順序，以便保持(或至少接近)更高效的95kbps檔案的質量。

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.

有什麼補充說明嗎？ 在評論中聽起來不對。 是否想從其他精通Stack Exchange的使用者那裡獲得更多答案？ 在此處檢視完整的討論執行緒。

翻譯自: https://www.howtogeek.com/163743/does-it-make-sense-to-convert-an-audio-file-to-a-higher-bitrate/

音訊位元率