This inventor holds 6 USPTO granted patents. Top assignees: Payview Limited, Other. Active years: 1982-1986.
Company Filing History:
4 out of 5 
2 out of 834,411 Years Active: 1982-1986
Title: Innovations of William S Cheung
Introduction
William S Cheung is a notable inventor based in Hong Kong, CN. He has made significant contributions to the field of audio and visual signal processing. With a total of 6 patents to his name, Cheung's work has had a considerable impact on television technology.
Latest Patents
Cheung's latest patents include an apparatus for producing audio and visual signals for modulating a television signal generator. This invention allows for the production of a composite RF signal without high-level intermodulation products. The signal network he developed linearly combines a first video modulated carrier signal with a second carrier frequency, which is modulated with an audio subcarrier. Additionally, he has created an audio subcarrier generator that utilizes a ceramic resonator as a frequency determining circuit element. This resonator is connected in parallel with a voltage-sensitive reactance element to generate a frequency modulated subcarrier in response to a modulating voltage. Another significant patent involves apparatus for encoding and decoding information, which employs multiple scrambling techniques to prevent unauthorized reception of television picture signals. This includes shifting horizontal synchronization pulses and video line inversion of selected lines within a field.
Career Highlights
Throughout his career, William S Cheung has worked with various companies, including Payview Limited. His innovative approaches and technical expertise have positioned him as a key figure in the development of modern television technology.
Collaborations
Due to space constraints, the details of collaborations will not be included.
Conclusion
William S Cheung's contributions to the field of audio and visual signal processing are noteworthy. His patents reflect a deep understanding of technology and innovation in television systems. His work continues to influence the industry and inspire future advancements.