80. A speech analysis and synthesis system for generating a set of parameters representative of an analog speech signal as produced by a model speech generator and reproducing from said set of parameters a replica of said analog speech signal, said system comprising: an analyzer including, means for sampling said analog speech signal to produce a plurality of digital speech data signals, means for separating said plurality of said speech data signals into a frame of speech data signals, means for analyzing said frame of speech data with a Cepstrum generator to produce a digital pitch period parameter for said frame of data, means for analyzing said frame of speech data with a voiced/unvoiced decision generator to produce a digital voiced/unvoiced decision parameter, and means for analyzing said frame of speech data with a linear prediction coefficient generator to produce a plurality of digital coefficient parameters and a digital power parameter; and a synthesizer including, digital pitch pulse generator means for receiving said digital pitch period parameter and generating pitch pulses having a corresponding pitch period, digital random noise generator means, switch means connected to said pitch pulse generator means and to said random noise generator means for receiving said digital voiced/unvoiced decision parameter, an output of said switch means being derived from said pitch pulse generator means if said decision is voiced and from said random noise generator means if said decision is unvoiced, gain control means connected to said output of said switch means for receiving said digital power parameter, a digital output level of said gain control means being dependent upon said power parameter, digital linear prediction filter means connected to said output of said gain control means for receiving and applying said digital coefficient parameters to said filter means to generate a digital replica of said speech signal at an output of said filter means, and means for converting said digital output of said filter means to a corresponding analog replica of said analog speech signal; wherein said digital pitch pulse generator means comprises means responsive to receipt of said digital pitch period parameter, for generating a sequence of control signals, and means responsive to said sequence of control signals for generating a substantially periodic, amplitude increasing pitch pulse excitation signal.
80. A speech analysis and synthesis system for generating a set of parameters representative of an analog speech signal as produced by a model speech generator and reproducing from said set of parameters a replica of said analog speech signal, said system comprising: an analyzer including, means for sampling said analog speech signal to produce a plurality of digital speech data signals, means for separating said plurality of said speech data signals into a frame of speech data signals, means for analyzing said frame of speech data with a Cepstrum generator to produce a digital pitch period parameter for said frame of data, means for analyzing said frame of speech data with a voiced/unvoiced decision generator to produce a digital voiced/unvoiced decision parameter, and means for analyzing said frame of speech data with a linear prediction coefficient generator to produce a plurality of digital coefficient parameters and a digital power parameter; and a synthesizer including, digital pitch pulse generator means for receiving said digital pitch period parameter and generating pitch pulses having a corresponding pitch period, digital random noise generator means, switch means connected to said pitch pulse generator means and to said random noise generator means for receiving said digital voiced/unvoiced decision parameter, an output of said switch means being derived from said pitch pulse generator means if said decision is voiced and from said random noise generator means if said decision is unvoiced, gain control means connected to said output of said switch means for receiving said digital power parameter, a digital output level of said gain control means being dependent upon said power parameter, digital linear prediction filter means connected to said output of said gain control means for receiving and applying said digital coefficient parameters to said filter means to generate a digital replica of said speech signal at an output of said filter means, and means for converting said digital output of said filter means to a corresponding analog replica of said analog speech signal; wherein said digital pitch pulse generator means comprises means responsive to receipt of said digital pitch period parameter, for generating a sequence of control signals, and means responsive to said sequence of control signals for generating a substantially periodic, amplitude increasing pitch pulse excitation signal. 81. A speech analysis and synthesis system as defined in claim 80 wherein: said control signal sequence generating means includes a counter producing a parallel output count in response to processing clock signals; and said means for generating said pitch pulse excitation signal includes a read-only memory means addressed by said parallel count output from said counter and the output of said read-only memory being said excitation signal.