Volume control device for digital signals

Daniel Schinkel (Inventor), Adrianus Johannes Maria van Tuijl (Inventor), Petrus A.C.M. Nuijten (Inventor)

    Research output: Patent

    17 Downloads (Pure)

    Abstract

    A digital volume control device comprises a logic unit for volume control of digital input signals. Successively supplied m-bits words with maximally k bits active, derived from the output signals of or supplied by a volume control (4) with a quantizer (5) element the filtered m-bits workds are passed, however, with only the j most significant active bits of these filtered signals. The noise shaper operates with a frequency that is a k/j-fold of the frequency by which the m-bits words are supplied. An up-sampler (3) is provided for operation frequency adjustment of the filtered m-bits words to the noise shaper. This operation frequency is at least a factor k/j greater than the sample rate of the digital input signals. The control signals for the logic unit are formed by the m-bits words passed by the quantizer.
    Original languageUndefined
    Patent numberWO2004IB50324
    Priority date4/01/06
    Publication statusSubmitted - 25 Mar 2004

    Keywords

    • IR-68229
    • EWI-14451
    • METIS-237945

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