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Phillip Kerman
2004-09-03, 07:57
> >There is really no such thing as 320Kbps VBR. Since 320Kbps is the
> >max rate for any mp3 frame, 320K vbr is exactly the same as 320K CBR
> >- you can't go any higher, so 320K VBR must mean every frame is
> >320K.j
>
> Really? Or would it mean that the maximum encoding rate was 320
> Kbps? I thought the idea of VBR was that it would use more bits when
> needed and fewer when it was not.
>
> I have never really understood what the specified bit rate meant in
> the context of a VBR file.
>

I believe if you say 200Kbps Variable... then the average comes to about
200Kbps. That is it uses more here and less there. What Sean is saying is
that since it can't go over 320... in order to maintain that average
(variable) it would have to be 320 the whole time.

Sort of like how if you have a 4.0 GPA you can't go below A even once.

Thanks,
Phillip

Kevin O. Lepard
2004-09-03, 17:45
> > >There is really no such thing as 320Kbps VBR. Since 320Kbps is the
>> >max rate for any mp3 frame, 320K vbr is exactly the same as 320K CBR
>> >- you can't go any higher, so 320K VBR must mean every frame is
>> >320K.j
>>
>> Really? Or would it mean that the maximum encoding rate was 320
>> Kbps? I thought the idea of VBR was that it would use more bits when
>> needed and fewer when it was not.
>>
>> I have never really understood what the specified bit rate meant in
>> the context of a VBR file.
>>
>
>I believe if you say 200Kbps Variable... then the average comes to about
>200Kbps. That is it uses more here and less there. What Sean is saying is
>that since it can't go over 320... in order to maintain that average
>(variable) it would have to be 320 the whole time.
>
>Sort of like how if you have a 4.0 GPA you can't go below A even once.

I understand now. The VBR bit-rate is an average, not a maximum.
Thanks for the explanation.

Kevin
--
Kevin O. Lepard
lepard.kevin (AT) fireserve (DOT) net

Happiness is being 100% Microsoft free.