Patents by Inventor Lifa Sun

Lifa Sun 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).

  • Phonetic posteriorgrams for many-to-one voice conversion
    Patent number: 10176819
    Abstract: A method for converting speech using phonetic posteriorgrams (PPGs). A target speech is obtained and a PPG is generated based on acoustic features of the target speech. Generating the PPG may include using a speaker-independent automatic speech recognition (SI-ASR) system for equalizing different speakers. The PPG includes a set of values corresponding to a range of times and a range of phonetic classes, the phonetic classes corresponding to senones. A mapping between the PPG and one or more segments of the target speech is generated. A source speech is obtained, and the source speech is converted into a converted speech based on the PPG and the mapping.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: January 8, 2019
    Assignee: The Chinese University of Hong Kong
    Inventors: Lifa Sun, Kun Li, Hao Wang, Shiyin Kang, Mei Ling Helen Meng
  • PHONETIC POSTERIORGRAMS FOR MANY-TO-ONE VOICE CONVERSION
    Publication number: 20180012613
    Abstract: A method for converting speech using phonetic posteriorgrams (PPGs). A target speech is obtained and a PPG is generated based on acoustic features of the target speech. Generating the PPG may include using a speaker-independent automatic speech recognition (SI-ASR) system for equalizing different speakers. The PPG includes a set of values corresponding to a range of times and a range of phonetic classes, the phonetic classes corresponding to senones. A mapping between the PPG and one or more segments of the target speech is generated. A source speech is obtained, and the source speech are converted into a converted speech based on the PPG and the mapping.
    Type: Application
    Filed: June 9, 2017
    Publication date: January 11, 2018
    Inventors: Lifa Sun, Kun Li, Hao Wang, Shiyin Kang, Mei Ling Helen Meng