Location History:
- Pointe Claire, CA (1995)
- Whitehall, PA (US) (1996)
Company Filing History:
Years Active: 1995-1996
Title: Vasu Iyengar: Innovator in Telecommunications
Introduction
Vasu Iyengar is a notable inventor based in Pointe Claire, Canada. He has made significant contributions to the field of telecommunications, particularly in methods for improving frequency response in voice channels. With a total of 2 patents, his work has had a considerable impact on the industry.
Latest Patents
Vasu Iyengar's latest patents include innovative methods and apparatus for estimating and adjusting frequency responses in telecommunications channels. The first patent focuses on estimating the frequency response by dividing signals into segments, identifying unvoiced segments, and measuring their spectral components. This process allows for time-averaged measurements that can be compared to expected unvoiced signal spectra, ultimately improving the accuracy of frequency response estimates. Filters can then be inserted into the channels to adjust these responses, compensating for poor bass frequency response in voice channels.
The second patent details a speech bandwidth extension method that analyzes narrowband speech sampled at 8 kHz. This method utilizes LPC analysis to determine spectral shape and inverse filtering to extract the excitation signal. The excitation signal is then interpolated to a higher sampling rate and analyzed for pitch control and power level. A synthesized wideband excitation signal is created by filtering a white noise generated wideband signal, which is then combined with the narrowband signal to produce an artificial wideband signal.
Career Highlights
Vasu Iyengar has worked at Northern Telecom Limited, where he has been able to apply his innovative ideas in telecommunications. His work has contributed to advancements in voice communication technology, enhancing the quality and clarity of transmitted speech.
Collaborations
Throughout his career, Vasu has collaborated with notable colleagues such as Rafi Rabipour and Paul Mermelstein. These collaborations have fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies in the telecommunications sector.
Conclusion
Vasu Iyengar's contributions to telecommunications through his patents and collaborative efforts have significantly advanced the field. His innovative methods for frequency response estimation and speech bandwidth extension continue to influence the industry today.