Patents Assigned to Voice Compression Technologies, Inc.
  • Patent number: 5742930
    Abstract: Voice compression is performed in multiple stages to increase the overall compression between the incoming analog voice signal and the resulting digitized voice signal over that which would be obtained if only a single stage of compression were to be used. A first type of compression is performed on a voice signal to produce an intermediate signal that is compressed with respect to the voice signal, and a second, different type of compression is performed on the intermediate signal to produce an output signal that is compressed still further. As a result, compression better than 1920 bits per second (and approaching 960 bits per second) are obtained without sacrificing the intelligibility of the subsequently reconstructed analog voice signal. Voice compression is also performed by recognizing redundant portions of said voice signal, such as silence, and replacing such redundant portions with a special code in said compressed signal.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: April 21, 1998
    Assignee: Voice Compression Technologies, Inc.
    Inventor: Andrew Wilson Howitt