## Trending News

# 研所考試(特急)

An audio signal is sampled 1200times per second,Each sample is represeted by 1024 different levels.

(a)How many bits are needed to represent each sample?

(b)How many bytes per second are needed to represent this signal?

我的解答是這樣不知道對不對 想了好幾天 找不到解答@@

(a)一次取樣表示1024不一樣的等級那就是等於 1024bits 我想一等級代表1bit??

(b)1024*1200/8=153600 bytes 這樣不知道對不對??

有利害的高手麻煩幫忙一下小弟感激不進。

### 1 Answer

- chengLv 41 decade agoFavorite Answer
An audio signal is sampled 1200times per second, Each sample is represented by 1024 different levels.

(a)How many bits are needed to represent each sample?

10 bits are needed to represent each sample with 1024 different levels.

Since 2 **10 = 1024 (2 的 10次方)

(b)How many bytes per second are needed to represent this signal?

10 * 1200 / 8 = 1500 bytes are needed to represent this signal.

Happy learning!

Source(s): myself, http://tw.myblog.yahoo.com/clin199