mp3的音质好坏和什么有关系,它比cd的音质差很多吗?

2024-12-17 23:51:01
推荐回答(4个)
回答1:

mp3的音质好坏和什么有关系,它比cd的音质差很多吗?
首先,你要知道声音如果用电子计算机来存储和表示的话也要用位来表示,这就是为什么外国称为为数位设备,比如数位相机,数位播放机。一段连续的声音其实是由很多的连续的位组成。一般如果按照8个位编码的话,比如00010001,那么一段音频可能就是有很多的这些XXXX,XXXX组成。如果按照16位编码的话,也就是由很多XXXX,XXXX,XXXX,XXXX组成,显然,用16位能记载比8位更多的信息。因为音质相对会更好,但是别忘了,16位要求很到的存储空间哦。
建议查找下面的概念来获得答案:
1.采样率
2.采样定理
3.音频编码和数据压缩算法(太专业了)
这些都有了大概的了解之后,你就会发现MP3为什么说解码芯片很关键,为什么MP3格式音质和WAV格式的音质不同,当然还有为什么和CD的音质不同。

回答2:

我解释一下,这是压缩方式决定的。

根据采样率和采样大小可以得知,相对自然界的信号,音频编码最多只能做到无限接近,至少目前的

技术只能这样了,相对自然界的信号,任何数字音频编码方案都是有损的,因为无法完全还原。在计算机

应用中,能够达到最高保真水平的就是PCM编码,被广泛用于素材保存及音乐欣赏,CD、DVD以及我们常见

的WAV文件中均有应用。因此,PCM约定俗成了无损编码,因为PCM代表了数字音频中最佳的保真水准,并

不意味着PCM就能够确保信号绝对保真,PCM也只能做到最大程度的无限接近。我们而习惯性的把MP3列入

有损音频编码范畴,是相对PCM编码的。强调编码的相对性的有损和无损,是为了告诉大家,要做到真正

的无损是困难的,就像用数字去表达圆周率,不管精度多高,也只是无限接近,而不是真正等于圆周率的

值。

回答3:

差巨多
可以找个CD和MP3放同样的歌试一下
另外就算把MP3不压缩也赶补上CD听的舒服。CD是无损的

回答4:

和MP3采用的芯片和耳塞有关

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