Signal processing device, reproducing device, signal processing method and program
AssigneeSony Corporation
InventorYoichi Hirota
Life of this patent
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Abstract
There is provided a signal processing device which includes a change position detection unit that detects stepwise change positions of an n-bit quantized signal generated from an input signal; a density detection unit that calculates a value indicating a degree of density of the stepwise change positions detected by the change position detection unit; and a first low-frequency component extraction unit that extracts a desired low-frequency component from the input signal based on the value indicating the degree of density of the change positions calculated by the density detection unit.
Claims15
A signal processing device comprising:
- a change position detection unit that detects stepwise change positions of an n-bit quantized signal generated from an input signal;
- a density detection unit that calculates a value indicating a degree of density of the stepwise change positions detected by the change position detection unit;
- and
- a first low-frequency component extraction unit that extracts a desired low-frequency component from the input signal based on the value indicating the degree of density of the change positions calculated by the density detection unit.
A reproducing device comprising:
- a change position detection unit that detects stepwise change positions of an n-bit quantized signal generated from an input signal;
- a density detection unit that calculates a value indicating a degree of density of the stepwise change positions detected by the change position detection unit;
- a first low-frequency component extraction unit that extracts a signal having a desired low-frequency component from the input signal based on the value indicating the degree of density of the change positions calculated by the density detection unit;
- and
- a reproducing unit that reproduces the signal having the desired low-frequency component extracted by the first low-frequency component extraction unit.
A signal processing method comprising the steps of:
- detecting stepwise change positions of an n-bit quantized signal generated from an input signal;
- calculating a value indicating a degree of density of the stepwise change positions detected in the step of detecting change positions;
- and
- extracting a desired low-frequency component from the input signal based on the value indicating the degree of density of the change positions calculated in the step of calculating a density.
A program causing a computer to execute a process comprising:
- change position detection processing that detects stepwise change positions of an n-bit quantized signal generated from an input signal;
- density detection processing that calculates a value indicating a degree of density of the stepwise change positions detected by the change position detection processing;
- and
- first low-frequency component extraction processing that extracts a desired low-frequency component from the input signal based on the value indicating the degree of density of the change positions calculated by the density detection processing.
Dependencies are inferred from the claim text.