Apparatus for reproducing encoded digital audio signal at variable speed
AssigneeKabushiki Kaisha Toshiba
InventorMasakazu Fukumoto
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Abstract
A variable-speed reproduction apparatus for reproducing an encoded digital audio signal is equipped with a signal supplier to accept an encoded digital audio signal with a frequency spectrum per block of the encoded audio and output the encoded digital audio signal at a desired speed, and a frequency-spectrum processor to perform mapping to frequency-spectrum components of the output encoded digital audio signal based on the desired speed, thus generating a processed frequency spectrum.
Claims20
A variable-speed reproduction apparatus for reproducing an encoded digital audio signal comprising:
- a signal supplier to accept an input of an encoded digital audio signal with a frequency spectrum per block of the encoded digital audio signal and output the encoded digital audio signal at a desired speed;
- and
- a frequency-spectrum processor to perform mapping to frequency-spectrumcomponentsof theoutputencodeddigitalaudio signal based on the desired speed, thus generating a processed frequency spectrum.
An audio reproduction system having a signal reader to retrieve an encoded audio digital signal from a storage medium storing MPEG audio signals, an MPEG audio decoder to decode the retrieved encoded audio digital signal at a desired speed among an original speed the same as a speed at which the MPEG audio signals have been stored in the storage medium, a speed of 1/N times lower than the original speed and a speed of N times higher than the original speed (N being a positive integer), and a speaker to output audio based on a digital or an analog audio signal reproduced by the MPEG audio decoder,
- wherein the MPEG audio decoder comprises:
- a signal supplier to accept the encoded digital audio signal with a frequency spectrum per block of the encoded audio and output the encoded digital audio signal at the desired speed;
- and
- a frequency-spectrum processor to perform mapping to frequency-spectrum components of the output encoded digital audio signal based on the desired speed, thus generating a processed frequency spectrum.
Dependencies are inferred from the claim text.