REPROCESSING FOR SPEECH ANALYSIS
P. J. Vicens · Defense Technical Information Center (DTIC) · 1968
The paper describes a procedure, and its hardware implementation, for the extraction of significant parameters of speech. The process involves division of the speech spectrum into convenient frequency bands, and calculation of amplitude and zero-crossing parameters in each of these bands every 10 ms. In the software implementation, a smoothing function divides the speech spectrum into two frequency bands (above and below 1000 Hz). In the hardware implementation, the spectrum is divided into three bands using bandpass filters (150-900 Hz, 900-2200 Hz, 2200-5000 Hz). Details of the design and implementation of the hardware device are given. (Author)