Implementation of the Gold-Rabiner pitch detector in a real time environment using an improved voicing detector

An implementation of Gold-Rabiner parallel processing pitch detector is described. Modifications to the original pitch detector that resulted in a more accurate voiced/unvoiced decision are presented. The modified pitch detector, along with all the tasks required by a real time, full duplex 2400 bit/s vocoder, have been implemented on a single Texas Instruments' TMS-320 microprocessor chip.