Thanks Steve,
Looks good:
1/ Can you send me the change in patch format please?
2/ Have you tested the change to ensure the output decoded speech is
identical (e.g. using diff)?
Thanks,
David
On Thu, 2014-06-19 at 09:52 -0500, Steve Sampson wrote:
> As a translater I usually have to at least look at the algorithms, so
> I thought I'd find another 512 floats and replace it with 1 float.
>
>
> in module quantise.c
>
>
> In function lpc_post_filter()
>
>
> The Pfw array is not used after being created. Making it a variable
> saves 2k bytes.
>
>
> Change:
>
>
> float Pfw[FFT_ENC]; /* Post filter mag spectrum */
>
>
> To:
>
>
> float Pfw;
>
>
> Change:
>
>
> /* apply post filter and measure energy */
>
>
> e_after = 1E-4;
> for (i = 0; i < FFT_SIZE / 2; i++) {
> Pfw[i] = powf(Rw[i], beta);
> Pw[i].real *= Pfw[i] * Pfw[i];
> e_after += Pw[i].real;
> }
>
>
> To:
>
>
> /* apply post filter and measure energy */
>
>
> e_after = 1E-4;
> for (i = 0; i < FFT_SIZE / 2; i++) {
> Pfw = powf(Rw[i], beta);
> Pw[i].real *= Pfw * Pfw;
> e_after += Pw[i].real;
> }
>
>
> eof
>
>
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Find What Matters Most in Your Big Data with HPCC Systems
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Leverages Graph Analysis for Fast Processing & Easy Data Exploration
http://p.sf.net/sfu/hpccsystems
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