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US 2006/0050898 A1Published application
Audio signal processing apparatus and method
AssigneeSony Corporation
InventorsYuji Yamada, Koyuru Okimoto
Life of this patent
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Abstract
An audio signal processing apparatus includes a dividing unit dividing each of two audio signals into a plurality of frequency bands, a level comparing unit determining a level ratio or level difference between the two audio signals in each of the plurality of frequency bands divided by the dividing unit, and an output control unit controlling an output of the dividing unit according to the level ratio or level difference determined by the level comparing unit.
Claims21
An audio signal processing apparatus comprising:
- dividing means for dividing each of two audio signals into a plurality of frequency bands;
- level comparing means for determining a level ratio or level difference between the two audio signals in each of the plurality of frequency bands divided by the dividing means;
- and
- output control means for controlling an output of the dividing means according to the level ratio or level difference determined by the level comparing means.
1 more element
An audio signal processing apparatus comprising:
- first transform means for transforming a first time-series audio signal of two time-series audio signals into a first frequency-domain signal;
- second transform means for transforming a second time-series audio signal of the two time-series audio signals into a second frequency-domain signal;
- level determining means for determining a level ratio or level difference between a frequency spectrum of the first frequency-domain signal obtained from the first transform means and a frequency spectrum of the second frequency-domain signal obtained from the second transform means;
- and
- output control means for controlling and outputting a level of the frequency spectrum obtained from at least one of the first transform means and the second transform means based on the level ratio or level difference determined by the level determining means.
2 more elements
An audio signal processing method comprising the steps of:
- dividing each of two audio signals into a plurality of frequency bands;
- determining a level ratio or level difference between the two audio signals in each of the plurality of divided frequency bands;
- and
- controlling an output of the divided audio signals according to the level ratio or level difference determined in the step of determining a level ratio or level difference.
1 more element
An audio signal processing method comprising the steps of:
- transforming two time-series audio signals into frequency-domain signals to produce two frequency spectra;
- determining a level ratio or level difference between the two frequency spectra produced in the step of transforming two time-series audio signals;
- and
- controlling and outputting a level of at least one frequency spectrum of the two frequency spectra produced in the step of transforming two time-series audio signals based on the level ratio or level difference determined in the step of determining a level ratio or level difference.
1 more element
An audio signal processing apparatus comprising:
- a dividing unit dividing each of two audio signals into a plurality of frequency bands;
- a level comparing unit determining a level ratio or level difference between the two audio signals in each of the plurality of frequency bands divided by the dividing unit;
- and
- an output control unit controlling an output of the dividing unit according to the level ratio or level difference determined by the level comparing unit.
1 more element
An audio signal processing apparatus comprising:
- a first transform unit transforming a first time-series audio signal of two time-series audio signals into a first frequency-domain signal;
- a second transform unit transforming a second time-series audio signal of the two time-series audio signals into a second frequency-domain signal;
- a level determining unit determining a level ratio or level difference between a frequency spectrum of the first frequency-domain signal obtained from the first transform unit and a frequency spectrum of the second frequency-domain signal obtained from the second transform unit;
- and
- an output control unit controlling and outputting a level of the frequency spectrum obtained from at least one of the first transform unit and the second transform unit based on the level ratio or level difference determined by the level determining unit.
2 more elements
Dependencies are inferred from the claim text.