David Alm: Automated Syncronization with Documentation

2011-11-22T00:23:09Z

Automated Syncronization with Documentation

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'''Class:''' [[Class ALSpeexCompressor.TALSpeexCompressor|TALSpeexCompressor]]

== Syntax ==
=== Delphi: ===
<code>
'''property''' UseVariableBitRate : Boolean '''read''' FVBR '''write''' FVBR;
</code>

=== C++ Builder: ===
<code>
'''__property''' bool UseVariableBitRate = { '''read'''=FVBR, '''write'''=FVBR };
</code>

== Summary ==
Enables/Disables the variable bit rate.

== Description ==
<code>
</code>
Use this property to enables or disables the variable bit
rate.

Variable bit-rate (VBR) allows a codec to change its bit-rate
dynamically to adapt to the difficulty of the audio being
encoded. In the example of Speex, sounds like vowels and
high-energy transients require a higher bit-rate to achieve
good quality, while fricatives (e.g. s,f sounds) can be coded
adequately with less bits. For this reason, VBR can achieve
lower bit-rate for the same quality, or a better quality for
a certain bit-rate. Despite its advantages, VBR has two main
drawbacks: first, by only specifying quality, theres no
guaranty about the final average bit-rate. Second, for some
real-time applications like voice over IP (VoIP), what counts
is the maximum bit-rate, which must be low enough for the
communication channel.

Delphi example:

<code>
ALSpeexCompressor1.UseVariableBitRate := True;

</code>
C++ Builder example:

<code>
ALSpeexCompressor1->UseVariableBitRate = true;

</code>
Visual C++(MFC/Win32) example:

<code>
ALSpeexCompressor1.UseVariableBitRate = true;

</code>
C# Example:

<code>
speexCompressor1.UseVariableBitRate = true;

</code>

Property ALSpeexCompressor.TALSpeexCompressor.UseVariableBitRate - Revision history

David Alm: Automated Syncronization with Documentation