Patents by Inventor Mingzi LI

Mingzi LI 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).

  • Echo cancellation method and apparatus based on time delay estimation
    Patent number: 11323807
    Abstract: An echo cancellation method based on delay estimation is provided. In the method, a microphone signal and a reference signal are received and preprocessed. In the preprocessed microphone signal and the preprocessed reference signal, frequency point signals with non-linearity in a current echo cancellation scenario are determined. A current delay estimation value is calculated based on frequency point signals without non-linearity in the microphone signal and the reference signal. The reference signal is shifted based on the current delay estimation value. An adaptive filter is updated based on the preprocessed microphone signal and the shifted reference signal, to perform echo cancellation.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: May 3, 2022
    Assignee: IFLYIEK CO., LTD.
    Inventors: Mingzi Li, Feng Ma, Haikun Wang, Zhiguo Wang, Guoping Hu
  • ECHO CANCELLATION METHOD AND APPARATUS BASED ON TIME DELAY ESTIMATION
    Publication number: 20210051404
    Abstract: An echo cancellation method based on delay estimation is provided. In the method, a microphone signal and a reference signal are received and preprocessed. In the preprocessed microphone signal and the preprocessed reference signal, frequency point signals with non-linearity in a current echo cancellation scenario are determined. A current delay estimation value is calculated based on frequency point signals without non-linearity in the microphone signal and the reference signal. The reference signal is shifted based on the current delay estimation value. An adaptive filter is updated based on the preprocessed microphone signal and the shifted reference signal, to perform echo cancellation.
    Type: Application
    Filed: July 16, 2018
    Publication date: February 18, 2021
    Applicant: IFLYTEK CO., LTD.
    Inventors: Mingzi LI, Feng MA, Haikun WANG, Zhiguo WANG, Guoping HU