SPEECH ANALYSIS AND SYNTHESIS BECOME PRACTICAL ON MU-C CHIP

Vocoder algorithms run in real time on a single-chip microcomputer whose architecture and storage space are tailored for high-speed processing, up to 5 million instructions per second. It is pointed out that a single-chip microcomputer can implement many of the algorithms needed not only to analyze but also to synthesize speech. For speech analysis, this means deriving a set of digital parameters that represent original speech signals. Methods include short-time mathematical techniques such as Fourier transforms, linear predictive coding, homomorphic analysis, and also pitch-detection algorithms.