Patents by Inventor Michimasa Sekiguchi

Michimasa Sekiguchi 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).

  • Digital signal processing apparatus
    Patent number: 6028542
    Abstract: A digital signal processing apparatus for matching the sampling frequency of an input digital signal to an internal sampling frequency. The digital signal processing apparatus has a sampling frequency converting unit for matching the sampling frequency of an input digital signal to an internal sampling frequency, a sampling frequency detection unit for detecting the sampling frequency of the input digital signa, a frequency difference calculating unit for finding the frequency difference between the inherent sampling frequency of the input digital signal and the sampling frequency detected by the sampling frequency detection unit and a pitch shifting unit for shifting the pitch of an output digital signal of the sampling frequency converting unit based upon said frequency difference. If the input digital signal has the sampling frequency slightly offset from the inherent sampling frequency, the signal of the inherent sampling frequency can be recovered, while the pitch can be restored to the inherent pitch.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: February 22, 2000
    Assignee: Sony Corporation
    Inventors: Takao Fukui, Kazutoshi Nomoto, Michimasa Sekiguchi