Patents by Inventor Stuart John Best

Stuart John Best 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 signal identification using digital labelling signals
    Patent number: 6438236
    Abstract: Apparatus for labelling a stereophonic signal includes a plurality of notch filters having selected center frequencies to form notches at the selected frequencies in the channels of a stereophonic audio signal. Code generating components produce a coded label signal in the form of one or more code words, with the code being formed of selected signal bursts at the selected frequencies. The coded label signals are inserted into both channels of the audio signal, in the notches formed by the notch filters. The code signal amplitude bears a predetermined relationship to the audio signal amplitude in each channel.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: August 20, 2002
    Assignee: Central Research Laboratories Limited
    Inventors: Stuart John Best, Martin Peter Todd, Timothy Poole, Ian Robert McLauchlan