SIGNAL INTERPOLATION DEVICE, SIGNAL INTERPOLATION METHOD AND RECORDING MEDIUM

Japanese Patent JP3713200

B2

PROBLEM TO BE SOLVED: To provide a signal interpolation device or the like that restores a signal close to an original signal with low distortion from a modulation wave obtained by using a signal resulting from limiting a frequency band of the original signal or restores an audio signal with high sound quality.
SOLUTION: A spectrum analysis section 3 decides a pass band of a variable BPF 1 and a variable HPF 6 and a frequency of a local oscillation signal on the basis of an input signal. The variable BPF 1 gives a component with a frequency band whose upper limit is the upper limit of the spectrum of the input signal to a mixer section 5. A variable frequency oscillation section 4 gives the local oscillation signal with the frequency equal to the pass bandwidth of the variable BPF 1 to the mixer section 5. The mixer section 5 mixes the component supplied from the variable BPF 1 with the local oscillation signal. The variable HPF 6 gives a component with the bandwidth having nearly equal to the pass bandwidth of the variable BPF 1 and adjacent to the high frequency side of the spectrum of the input signal in the signal generated through the mixing by the mixer section 5 to an adder section 7. The adder section 7 adds the signal fed from the variable HPF 6 to the input signal delayed by a delay section 2 to provide an output signal.

WO/2021/030334	AUDIO CALIBRATION OF A PORTABLE PLAYBACK DEVICE
JP2010004235	EQUALIZER SYSTEM
JPH09271086	BONE CONDUCTION MICROPHONE

Yasushi Sato

JP2000366021A

November 02, 2005

November 30, 2000

Click for automatic bibliography generation  

Kenwood Corporation

H04R3/04; G10L13/00; G10L19/02; G10L21/0388; (IPC1-7): H04R3/04; G10L21/04

JP2001356788A
JP793900A
JP6435385A
JP4129064A
JP11215522A
JP2000269860A

Kimura Mitsuru

Previous Patent: HIGH FREQUENCY SUPERPOSING CIRCUIT FOR SEMICONDUCTOR LASER

Next Patent: ELECTRONIC ENDOSCOPE