Patents by Inventor Lance Foreman Amos

Lance Foreman Amos 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 canceler and double-talk detector for use in a communications unit
    Patent number: 6415029
    Abstract: A hands-free communications unit employs a downlink peak power memory element (150, FIG. 1), a downlink voice activity detector (140), and an uplink voice activity detector (180). The downlink voice activity detector (140) evaluates the incoming signal to determine if the signal includes voice. In a similar manner, the uplink voice activity detector (180) determines if an outgoing signal includes voice. In the event that the incoming signal includes voice and the energy of the outgoing signal exceeds a threshold calculated from the peak power of the incoming signal, the uplink voice activity detector (180) indicates that a double-talk condition exists (350, FIG. 3). In the event that the incoming signal does not include voice, the uplink voice activity detector (180) compares the uplink signal to a voice threshold above a noise floor to determine if the outgoing signal includes voice.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: July 2, 2002
    Assignee: Motorola, Inc.
    Inventors: James Brian Piket, Lance Foreman Amos, Holly Elizabeth Hall, William Chunhung Yip
  • ECHO CANCELER AND DOUBLE-TALK DETECTOR FOR USE IN A COMMUNICATIONS UNIT
    Publication number: 20020057791
    Abstract: A hands-free communications unit employs a downlink peak power memory element (150, FIG. 1), a downlink voice activity detector (140), and an uplink voice activity detector (180). The downlink voice activity detector (140) evaluates the incoming signal to determine if the signal includes voice. In a similar manner, the uplink voice activity detector (180) determines if an outgoing signal includes voice. In the event that the incoming signal includes voice and the energy of the outgoing signal exceeds a threshold calculated from the peak power of the incoming signal, the uplink voice activity detector (180) indicates that a double-talk condition exists (350, FIG. 3). In the event that the incoming signal does not include voice, the uplink voice activity detector (180) compares the uplink signal to a voice threshold above a noise floor to determine if the outgoing signal includes voice.
    Type: Application
    Filed: May 24, 1999
    Publication date: May 16, 2002
    Inventors: JAMES BRIAN PIKET, LANCE FOREMAN AMOS, HOLLY ELIZABETH HALL, WILLIAM CHUNHUNG YIP