Apparatus and method for audio-signal-processing
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNaoyuki Katou, Yoshinori Kumamoto, Jun Ikeda
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Abstract
The band-decomposition unit with the band-decomposition characteristic based on the harmonic-tone composition of the musical instrument and the low interval limit generates the harmonic-tone to each band signal after decomposing the virtually producing bass signal into a plurality of band signals. It generates a harmonic-tone individually for each pure tone component that comprises complex tone and suppresses deterioration of the sound quality. This makes it feasible to restrain increase in the number of band-decomposition units and to reduce the circuit sales.
Claims20
An audio-signal-processing apparatus comprising:
- a band-decomposition unit, having a decomposition characteristic, operable to decompose a low frequency component of input-audio-signals into a plurality of frequency components that have different frequency bands based on the decomposition characteristic;
- a harmonic-series-generating unit operable to generate a harmonic-tone component based on at least one of the plurality of frequency components;
- and
- a composition unit operable to compound the input-audio-signals and the harmonic-tone component generated by said harmonic-series-generating unit.
An audio-signal-processing apparatus comprising:
- a sum component output unit operable to receive input-audio-signals of a first channel and input-audio-signals of a second channel and output a sum component of the input-audio-signals of the first channel and the input-audio-signals of the second channel;
- a band-decomposition unit, having a decomposition characteristic, operable to decompose the sum component into a plurality of frequency components that have different frequency bands based on the decomposition characteristic;
- a harmonic-series-generating unit operable to generate a harmonic-tone component based on at least one of the plurality of frequency components;
- a first composition unit operable to compound the input-audio-signals of the first channel and the harmonic-tone component generated by said harmonic-series-generating unit;
- and
- a second composition unit operable to compound the input-audio-signals of the second channel and the harmonic-tone component generated by said harmonic-series-generating unit.
An audio-signal-processing method comprising:
- decomposing a low frequency component of input-audio-signals into a plurality of frequency components that have different frequency bands based on a decomposition characteristic;
- generating a harmonic-tone component based on at least one of the plurality of frequency components;
- and
- compounding the input-audio-signals and the generated harmonic-tone component.
Dependencies are inferred from the claim text.