![]() Let's get back to the official MPEG standard document and avoid your confusing literature for a moment! The quantizer has a numeric value that expresses the number of bits I use to encode each sample. Once I've calculated it I use to divide each sample, obtaining 12 samples whose value is in the range. The scalefactor is the largest sample of a sub-band. This is a piece that treats the part I didn't understand.įor each sub-band, the scalefactor (stored on 6 bits) is calculated from the 63 available and a quantizer (on 4 bits) of the 14 available. I read (quickly) the book you've been advising me (Introduction to Digital Audio Coding and Standards from Bosi). So MPEG layer I use a linear or not lineare quantization? I think the scalefactor is a kind of exponent in the case of non linear and floating point quantization. Somewhere I've read the quantization steps are the same for each sub-band and they are 2 dB each ( linear quantization), so what's the scalefactor meaning? I know that point 5 is very superficial because I didn't understand the parts related to the scalefactor and the 14 different quantizers. encode the samples and form the package.encoder processes each sub-band individually and through a psychoacoustic analysis determine the number of bits to allocate for each quantized sample and possible quantization levels ( linear quantization).Each subfield therefore contains 12 samples ![]()
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