Sound quality regulation apparatus
AssigneeRohm Co., Ltd.
InventorsShigeji Ohama, Hiroyuki Saito
Life of this patent
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Abstract
The sound quality regulation apparatus has one attenuation unit and one amplification unit connected in series in this order in the signal line of the apparatus. The output of the attenuation unit is fed to a multiplicity of sound regulators associated with the split frequency bands of the input signal. Each sound regulator includes a switched capacity filter and a selector for selectively supplying the output of the sound regulator to either the attenuation unit, amplification unit, or none of these units. The sound quality regulation apparatus is thus capable of individually attenuating, enhancing, or not changing split frequency bands of the input signal.
Claims9
A sound quality regulation apparatus for regulating split frequency bands of an input signal, comprising:
- an attenuation unit which is capable of receiving an input signal and a regulation signal associated with at least one predetermined frequency band, and is adapted to generate an attenuated signal of said input signal which is attenuated in said frequency band based on said regulation signal;
- an amplification unit which is capable of receiving said attenuated signal from said attenuation unit and a regulation signal associated with at least one frequency band, and is adapted to generate an output signal which is amplified in said frequency band based on said regulating signal;
- and
- at least one sound regulator associated with one frequency band of said input signal, said sound regulator including
- a SC filter receiving said attenuated signal from said attenuation unit and permitting the frequency band associated with said sound regulator to pass therethrough as a regulation signal, and
- a selection device connected with said SC filter and adapted to selectively feeding said regulation signal to either said attenuation unit, said amplification unit, or none of said units.
Dependencies are inferred from the claim text.