hardsamplebits.htm

来自「g729 coding ipaddressing」· HTM 代码 · 共 33 行

HTM
33 行
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" Content="text/html; charset=Windows-1252">
<TITLE>Sampling: 8 vs. 16 bits</TITLE>
</HEAD>

<BODY BGCOLOR="#FFFFFF" TEXT="#000000">

<OBJECT TYPE="application/x-oleobject" CLASSID="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
	<PARAM NAME="Keyword" VALUE="Sample size">
	<PARAM NAME="Keyword" VALUE="Sound card, capabilities">
</OBJECT>

<h2><A NAME="hardsamplebits"></A>Sampling: 8 vs. 16 bit</h2>

<P>For the best sound quality, 16 bit sampling is desirable. 
<i>Speak Freely</i> translates 16 bit Pulse Code Modulation (PCM)
samples into an 8 bit logarithmic encoding known as mu-law (祃aw),
which effectively squeezes 13 bits of audio information into
each 8 bit byte.  If your sound hardware supports 16 bit
samples, that mode is automatically chosen.  If, for some
reason, you want to run in 8 bit mode (which sounds worse and
doesn't run any faster) you can do so by checking the
Options/Use 8-bit Audio menu item.</P>

<P>If your hardware supports only 8 bit samples, this menu item
is automatically checked and disabled, since you don't have the
option of using 16 bits.</P>

</BODY>
</HTML>

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