Patents by Inventor Richard Kos

Richard Kos 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).

  • PTP-based audio clock synchronization and alignment for acoustic echo cancellation in a conferencing system with IP-connected cameras, microphones and speakers
    Patent number: 11477328
    Abstract: PTP timestamps are obtained and correlated to internal audio time and timestamps. This allows Ethernet/IP audio devices to be closely aligned with local digital audio devices to allow improved AEC operations. By performing repetitive PTP timestamps based on local audio time, drift between PTP time and local audio time is determined and corrected. By performing the PTP to local audio time operations on each independent Ethernet network, the Ethernet/IP audio devices can be split between independent LANs. If some local digital audio inputs formed from analog inputs are not aligned with other local digital audio inputs, signals can be provided in analog format and audio samples of the signals can be correlated to local audio time. With correlations performed as necessary based on the various audio inputs in use, high quality AEC operations are performed.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: October 18, 2022
    Assignee: Plantronics, Inc.
    Inventors: Yibo Liu, Steven Potts, Peter Chu, Richard Kos, Gary Brown, John Dietz
  • PTP-based Audio Clock Synchronization and Alignment for Acoustic Echo Cancellation in a Conferencing System with IP-connected Cameras, Microphones and Speakers
    Publication number: 20200358907
    Abstract: PTP timestamps are obtained and correlated to internal audio time and timestamps. This allows Ethernet/IP audio devices to be closely aligned with local digital audio devices to allow improved AEC operations. By performing repetitive PTP timestamps based on local audio time, drift between PTP time and local audio time is determined and corrected. By performing the PTP to local audio time operations on each independent Ethernet network, the Ethernet/IP audio devices can be split between independent LANs. If some local digital audio inputs formed from analog inputs are not aligned with other local digital audio inputs, signals can be provided in analog format and audio samples of the signals can be correlated to local audio time. With correlations performed as necessary based on the various audio inputs in use, high quality AEC operations are performed.
    Type: Application
    Filed: May 11, 2020
    Publication date: November 12, 2020
    Inventors: Yibo Liu, Steven Potts, Peter Chu, Richard Kos, Gary Brown, John Dietz