Speech processor having speech analyzer and synthesizer

A speech processor including a speech analysis part for receiving and analyzing a speech sound and generating analysis signals representing said speech sound and a speech analysis part for reproducing said speech sound from said analysis signals, in which said speech analysis part comprises:

• means for generating a series of samples at a predetermined frequency representing said speech sound, a predetermined number of successive samples comprising an analysis frame period;
• means for receiving said samples and for developing parameter signals including speech sound spectrum and sound source information signals representing said speech sound for each said frame period, said speech sound source information signals including a voiced or unvoiced discrimination signal, pitch period signal and short-time mean power signal;
• and
• means for quantizing and encoding each of said parameter signals, said encoding being performed for predetermined parameter signals in a predetermined number of encoding bits covering a range of values having a high rate of occurrence for each said predetermined parameter signals, said range of values for any one of said predetermined parameter signals differing in accordance with said voiced or unvoiced discrimination signal;
• and in which said speech synthesis part comprises:
• a decoder responsive to said voiced or unvoiced discrimination signal for decoding said encoded parameter signals;
• and
• a synthesizing digital filter having coefficients determined by said speech sound spectrum information signals and excited by said speech sound source information signals.