Patent ID: 7269552

Claim:
A method for one of coding and decoding speech signal sampled values, comprising the steps of: quantizing values previously obtained by an analysis from the speech signal sampled values and used for a generation of speech signal parameters before being stored in code books/code tables, the quantizing occurring to a word length that results in no noticeable losses in speech quality; storing in the code books/code tables the values previously obtained by the analysis from the speech signal sampled values and used for the generation of speech signal parameters; scaling the values of each code book/code table such that an available range of values is exploited as completely as possible, the step of scaling including the steps of: determining a maximum of a positive value and a negative value of each code book/code table, if the available range of values is exceeded, performing a multiplication of the values of each code book/code table by a first factor smaller than one, and repeating the multiplication until all elements are located in the available range of values; and causing a number of repeated multiplications to be used as a scaling factor for all code book/code table entries, wherein for a HXVC (Harmonic Vector Excitation Coding) speech coder/speech decoder, LPC coefficients, spectral envelopes of a speech signal, and unvoiced segments of the speech signal are stored in quantized form in corresponding ones of the code books/tables.