[FFmpeg-devel] [PATCH 03/11] aaccoder: add intensity stereo coding support for the trellis quantizer
klaussfreire at gmail.com
Sun Jun 28 03:36:11 CEST 2015
On Fri, Jun 26, 2015 at 5:16 PM, Rostislav Pehlivanov
<atomnuker at gmail.com> wrote:
> +/* Energy spread threshold value below which no PNS is used, this corresponds to
> + * typically around 17Khz, after which PNS usage decays ending at 19Khz */
> +#define NOISE_SPREAD_THRESHOLD 152234544.0f
> +/* Above ~1.26*threshold all normally-zeroed values are PNS'd. Lambda divides
> + * the defined value below as to try to get a ~1.26 multiplier so that there is
> + * a balance between noise and zero bands leaving more bits for actual signal */
> +#define NOISE_LAMBDA_NUMERATOR 252.1f
This should go to #09 shouldn't it?
> +/** Frequency in Hz for lower limit of intensity stereo **/
> +#define INT_STEREO_LOW_LIMIT 6000
And that to #10.
Or wherever it's used first, I'd say.
Other than that, it looks good.
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