Location History:
- Bayan Lepas, MY (2014 - 2019)
- Penang, MY (2016 - 2019)
Company Filing History:
Years Active: 2014-2019
Title: Innovations by Cheah Heng Tan
Introduction
Cheah Heng Tan is a notable inventor based in Bayan Lepas, Malaysia. He has made significant contributions to the field of voice activity detection and signal processing. With a total of 13 patents to his name, his work has had a considerable impact on audio technology.
Latest Patents
One of his latest patents is a method and apparatus for voice activity detection. This system filters audio input frames on a frame-by-frame basis through a gammatone filterbank to generate filtered gammatone output signals. A signal energy calculator takes these filtered signals and generates a plurality of energy envelopes. Weighting factors are constructed and applied to each energy envelope, producing a normalized weighted signal that emphasizes voice regions while minimizing noise regions. An entropy measurement is taken to extract information from the normalized weighted signals, generating an entropy signal that is averaged and compared to an adaptive entropy threshold indicative of a noise floor. Decision logic is then used to identify speech and noise based on this comparison.
Another significant patent involves a method and apparatus for discriminating between voice signals. This innovation employs spectral reshaping of one or more audio signals played together over the same speaker. The spectral reshaping modifies the timbre of the voice signal without altering its pitch. Additional techniques, such as dynamic gain offset and frequency shifting, can further distinguish between voice signals. After processing, the reshaped signals can be played over the same speaker, allowing users to better distinguish between multiple voice signals.
Career Highlights
Cheah Heng Tan is currently employed at Motorola Solutions, Inc., where he continues to innovate in the field of audio technology. His work has been instrumental in advancing voice signal processing techniques.
Collaborations
He collaborates with talented coworkers, including Kheng Shiang Teh and Thean Hai Ooi, who contribute to his projects and innovations.
Conclusion
Cheah Heng Tan's contributions to voice activity detection and signal processing demonstrate his expertise and commitment to innovation. His patents reflect a deep understanding of audio technology and its applications.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.