Hi all,
Just a thought I share, because of associations I won't bother you with,
suppose you take some form of audio compression, say Fmp3(wav) which
transforms "wav" to an mp3 form, with some encoding parameters. Now we
consider the linearity of the transform, most people will know this:
F
On 2/12/15 3:02 PM, Theo Verelst wrote:
Hi all,
Just a thought I share, because of associations I won't bother you
with, suppose you take some form of audio compression, say Fmp3(wav)
which transforms "wav" to an mp3 form, with some encoding parameters.
Now we consider the linearity of the tra
It's lossy. Definitely not linear.
On Thu, Feb 12, 2015 at 4:33 PM, robert bristow-johnson
wrote:
> On 2/12/15 3:02 PM, Theo Verelst wrote:
>>
>> Hi all,
>> Just a thought I share, because of associations I won't bother you with,
>> suppose you take some form of audio compression, say Fmp3(wav) w
Ian Esten wrote:
It's lossy. Definitely not linear.
Right, it's not linear, because probably there are quantization
differences for absolute volume differences, and surely, frequency
components are approximated, and there is a maximum in information that
it can put in the encoded output, so
A low-pass filter codec compression scheme; now that sounds like genuine snake
oil to me!
On Fri, Feb 13, 2015 at 7:02 PM, Theo Verelst wrote:
> Ian Esten wrote:
>> It's lossy. Definitely not linear.
>>
> Right, it's not linear, because probably there are quantization
> differences for absolut
On a serious note, this may already be employed in hardware samplers. I
couldn’t find much info on it. SNES and Playstation store samples in a
compressed ADPCM format.
http://en.wikipedia.org/wiki/Bit_Rate_Reduction
On Thu, Feb 12, 2015 at 3:02 PM, Theo Verelst wrote:
> Hi all,
> Just a
> Lossy encoding wouldn't necessarily be non-linear in all cases.
Of course it is non-linear. Lossy encoding does not satisfy the
conditions of linearity:
f(a + b) = f(a) + f(b)
f(a.b) = a.f(b)
--
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BTW, what does linearity have to do with implementing compressed audio into
samplers? Why not just include a decoder upon playback?
On Fri, Feb 13, 2015 at 7:56 PM, Ian Esten wrote:
>> Lossy encoding wouldn't necessarily be non-linear in all cases.
> Of course it is non-linear. Lossy encoding