Patents by Inventor Tatsushi Oyama

Tatsushi Oyama 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).

  • Audio processing method and audio processing apparatus
    Patent number: 7305346
    Abstract: A volume adjustment unit reduces the volume of audio data. By coding the audio data where the volume is reduced in advance, the possibility of being decoded in a manner of exceeding the maximum bit number at a reproduction-side apparatus is reduced. Thus, the volume adjustment unit needs to reduce the volume of the audio data during a processing at a data input unit up to a quantization coding unit, that is, before the end of quantizing, based on a compression ratio.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: December 4, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tatsushi Oyama, Hideki Yamauchi
  • Audio processing method and audio processing apparatus
    Publication number: 20030182134
    Abstract: A volume adjustment unit reduces the volume of audio data. By coding the audio data where the volume is reduced in advance, the possibility of being decoded in a manner of exceeding the maximum bit number at a reproduction-side apparatus is reduced. Thus, the volume adjustment unit needs to reduce the volume of the audio data during a processing at a data input unit up to a quantization coding unit, that is, before the end of quantizing, based on a compression ratio.
    Type: Application
    Filed: March 19, 2003
    Publication date: September 25, 2003
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Tatsushi Oyama, Hideki Yamauchi