Patents by Inventor Wei-Shun Shum

Wei-Shun Shum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Low-latency audio output with variable group delay
    Patent number: 10701486
    Abstract: A system may include a filter configured to receive a digital audio input signal quantized at between two and 257 quantization levels and sampled at at least 500 kilohertz, the filter further configured to perform filtering on the digital audio input signal to generate a filtered digital audio input signal, the filter having a selectable variable group delay, a digital-to-analog converter configured to receive the filtered digital audio input signal and convert the filtered digital audio input signal into an equivalent analog audio input signal, and a driver configured to receive the equivalent analog audio input signal and drive an analog audio output signal to a transducer.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: June 30, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: John L. Melanson, Xiaofan Fei, Lei Zhu, Xin Zhao, Wei-Shun Shum, Leyi Yin, Ku He, Johann G. Gaboriau