Research and Development for Digital Voice Processing (DVP)
J.D. Tardelli, Philip A. LaFollette, C. M. Walter, Jeanne-Marie LeBlanc, Paul Gatewood · Defense Technical Information Center (DTIC) · 1991
This technical report covers a variety of topics and research areas. An update of the Canonical Coordinate (CC) Transformation process for digital speech compression based on non-Euclidean error minimization criteria is given. A method of transforming empirical filter sets to unitary error metrics is introduced and a sample error metric is developed. Research into frequency shift invariant transformation is presented and its utility for developing CC error metrics is discussed. A study into the relationship between CC analysis and Linear Predictive Coding is presented. An improved AP120-B implementation of the CC algorithm is given along with a fully parallel CC implementation on a systolic array processor. The latest developments in processor hardware, operating systems, and program development software at RADC/EEV are documented. Custom additions to the Interactive Laboratory System (ILS) analysis and display package are covered along with its relationship to the Speech Data Base Library used at RADC/EEV. Data Base input/output programs, analysis tools, search/sort programs are all presented. The status of a communicability testbed system at the Speech Processing Facility is presented.