Method for coding speech containing noise-like speech periods and/or having background noise

A method for coding speech containing nose-like speech periods, the method comprising the steps of:

• digitizing a speech containing input signal having noise-like speech periods, speech periods, and non-speech periods;
• distinguishing the non-speech periods and noise-like speech periods from the speech periods in the digitized input signal;
• determining a pitch prediction contribution for each speech period;
• using an adaptive code book as a source of pseudo-random sequences;
• and
• selecting the most suitable pseudo-random sequence for each non-speech period and noise-like speech period from the adaptive code book.

A method for coding speech containing noise-like speech periods, the method comprising the steps of:

• digitizing a speech containing input signal having noise-like speech periods and speech periods;
• distinguishing the noise-like speech periods from the speech periods in the digitized input signal;
• determining a pitch predictor contribution for each speech period;
• using an adaptive code book as a source of pseudo-random sequences;
• and
• selecting the most suitable pseudo-random sequence for each noise-like speech period from the adaptive code book.