Company Filing History:
Years Active: 1994-1997
Title: Innovations of James C Thi
Introduction
James C Thi is an accomplished inventor based in Gaithersburg, MD (US). He holds 2 patents that showcase his expertise in communication systems and signal processing. His work has significantly contributed to advancements in echo cancellation and noise control technologies.
Latest Patents
One of Thi's notable patents is a "Method and apparatus for echo removal in a communication system." This invention involves a signal processor designed for telephonic communication systems that interconnect near and far locations. The echo canceller within this system suppresses the re-transmission of received signals. The operation of the echo canceller is intelligently controlled based on the transmission and reception states of both locations. The system includes mechanisms for detecting doubletalk, allowing for effective communication without interruptions.
Another significant patent is the "Low-delay subband adaptive filter." This invention retains the advantages of subband processing while eliminating delays in the signal path. It has applications in active noise control and acoustic echo cancellation, where delays can hinder performance. The process involves decomposing reference and error signals into subband signals, generating adaptive weighting coefficients, and transforming these coefficients to create wideband filter coefficients for a programmable filter. This innovative approach minimizes residual error signals, enhancing disturbance reduction.
Career Highlights
James C Thi has worked with prestigious organizations such as AT&T Bell Laboratories and Lucent Technologies Inc. His experience in these companies has allowed him to develop and refine his innovative ideas in the field of signal processing.
Collaborations
Thi has collaborated with notable individuals in his field, including Dennis Raymond Morgan and Egbert Ammicht. Their collective expertise has contributed to the advancement of technologies in communication systems.
Conclusion
James C Thi's contributions to the field of signal processing and communication systems are noteworthy. His patents reflect a commitment to innovation and improvement in technology. His work continues to influence the industry and pave the way for future advancements.