Code covered by the BSD License  

Highlights from
Quantizers

• PDFFn (PDFType, Arg1, Arg2) Return pointers to functions to calculate functions of the PDF
• Quant (x, Xq, QType) Quantize a vector of samples
• QuantALawTables() This routine returns quantization tables for a 256 level segmented A-law
• QuantEntropy (Xq, Farea) Calculate the entropy for a quantizer
• QuantLloyd (Nlev, FPDF, QSym) Iterate to find the output levels for a minimum mean square error
• QuantMSE (Yq, Xq, FPDF) Calculate the mean-square quantization error
• QuantMuLawTables() This routine returns quantization tables for a 256 level segmented mu-law
• QuantOpt (Nlev, FPDF, Sym) Find a non-uniform minimum mean square error quantizer.
• QuantRefine (Yq, FPDF, QSym) Iterate to find the output levels for a MMSE quantizer.
• QuantSNR (Yq, Xq, FPDF, Scale... Calculate the SNR (dB) for a quantizer defined by a table for a
• QuantUnif (Nlev, FPDF, Sym) Find a uniform minimum mean square error quantizer.
• TestPDF Use two different methods to calculate each of the following
• p=lin2pcma(x,m,s)
• tLogQuant (enc) Test Quant for A or mu-law quantizer tables
• tQuantOpt
• tQuantUnif
• x=pcma2lin(p,m,s)
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