Company Filing History:
Years Active: 1983-1986
Title: The Innovations of Tong L Lim
Introduction
Tong L Lim is a notable inventor based in Middletown, NJ (US). He has made significant contributions to the field of image signal processing and interference cancellation. With a total of 2 patents, his work has had a lasting impact on technology.
Latest Patents
One of Tong L Lim's latest patents is a coding technique for image signals. This invention utilizes a variable-length coder optimized for the order statistics of a run-length-coded bilevel image. The process involves coding a stream of differential-pulse-code-modulated (DPCM) errors that represent a multi-level image. The DPCM errors are rearranged line-by-line to create a stream with many long runs. The individual words in this rearranged stream are modified to ensure that the most frequently occurring words align with the desired order statistics. The final signal is then run-length-coded, processed through the variable-length coder, and transmitted, with reverse processing at the receiver.
Another significant patent is the interference cancellation method and apparatus. This invention generates weighted sums of samples from an interference-corrupted data signal to create phase-compensated, symbol-spaced samples. The corrupted signal undergoes conventional adaptive equalization while forming tentative decisions about the transmitted data. Cancellation signals are produced by forming weighted sums of these tentative decisions, which are then combined with the phase-compensated samples to yield final data decisions. The weighting coefficients are adaptively updated based on error signals derived from the differences between the cancelled samples and the final decisions.
Career Highlights
Tong L Lim has worked with prestigious organizations such as Bell Telephone Laboratories and AT&T Bell Laboratories. His experience in these companies has allowed him to develop and refine his innovative ideas in signal processing.
Collaborations
Throughout his career, Tong L Lim has collaborated with notable individuals, including Allen Gersho and Edmond Y Ho. These partnerships have contributed to the advancement of his inventions and the field as a whole.
Conclusion
Tong L Lim's contributions to image signal processing and interference cancellation demonstrate his innovative spirit and technical expertise. His patents reflect a deep understanding of complex systems and a commitment to advancing technology.