Steve Voran will be presenting a TCP Seminar on February 26th. We have all encountered a wide range of phone call experiences, from clear, to muffled, to choppy, to “I have no idea what you just said.” We will investigate some of the factors that contribute to these different experiences – both from a technology viewpoint and from the all-important perspective of human auditory perception. The latter will naturally be generously augmented with interactive audio examples. From that basis we will explore current and emerging options for measuring the quality of speech produced by a phone and, as a separate but related issue, the intelligibility of phone speech. This will include two broad classes of measurements, those that use actual listeners (subjective testing) and those that use only algorithms (predicting what your opinion of a captured speech signal would be). We will explain how these user-level speech measurements are one integral part of a much larger effort to characterize and optimize telecommunications at the US Department of Commerce’s Institute for Telecommunication Sciences.
About the Speaker
Steve Voran received the MSEE degree from University of Colorado, Boulder in 1989. He joined the Institute for Telecommunication Sciences (also in Boulder) in 1990. Steve has applied digital signal processing to solve numerous telecommunications problems, mainly in the areas of speech and audio coding, transmission, enhancement, and quality assessment. His work has led to several patents and products and numerous publications and reports. Most recently he has lead several measurement campaigns to characterize speech coders that can be used for mission critical voice communications and has partnered to develop an effective and novel no-reference speech waveform evaluation algorithm.