MPEG-1, 2 Layer III and MPEG-4 AAC audio encoders raise the spectral data to the power of 3/4 before quantization to provide a more consistent signal-to-noise ratio over the range of quantized values. The re-quantizers in the decoders linearize the values by raising their output to the power of 4/3.
The use of the functions described in this section is demonstrated in Intel® IPP Samples downloadable from http://www.intel.com/cd/software/products/asmo-na/eng/220046.htm.
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