Frequency-characteristic-acquisition device, frequency-characteristic-acquisition method, and sound-signal-processing device
AssigneeSony Corporation
InventorYasuyuki Kino
Life of this patent
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Abstract
A frequency-characteristic-acquisition device that inputs a time-stretched-pulse signal to a system to be measured and that acquires information about a frequency characteristic of the system on the basis of a signal output from the system is provided. The frequency-characteristic-acquisition device includes a control unit which performs control so that the time-stretched-pulse signal is expanded in a time-axis direction and output to the system, and an acquisition unit that analyzes the signal output from the system and that acquires the frequency-characteristic information.
Claims10
A frequency-characteristic-acquisition device that inputs a time-stretched-pulse signal to a system to be measured and that acquires information about a frequency characteristic of the system based on a signal output from the system, the frequency-characteristic-acquisition device comprising:
- storage means that stores data representing an original time-stretched-pulse signal;
- control means that generates an expanded time-stretched-pulse signal and outputs the expanded time-stretched-pulse signal to the system, wherein the control means generates the expanded time-stretched-pulse signal by up-sampling the original time-stretched-pulse signal by a factor of K, wherein the original time-stretched-pulse signal has a period length n, and the expanded time-stretched-pulse signal has a period length n×K;
- and
- acquisition means that analyzes the signal output from the system and that acquires the frequency-characteristic information.
A frequency-characteristic-acquisition method comprising:
- generating an expanded time-stretched-pulse signal by up-sampling an original time-stretched-pulse signal represented by stored data by a factor of K, wherein the original time-stretched-pulse signal has a period length n, and the expanded time-stretched-pulse signal has a period length n×K;
- transmitting the expanded time-stretched-pulse signal to a system to be measured;
- and
- analyzing a signal output from the system, so as to acquire information about a frequency characteristic of the system.
A sound-signal-processing device comprising:
- reproduction means that reproduces a sound signal to be output from a speaker;
- storage means that stores data representing an original time-stretched-pulse signal;
- control means that generates an expanded time-stretched-pulse signal and outputs the expanded time-stretched-pulse signal from the speaker, wherein the control means generates the expanded time-stretched-pulse signal by up-sampling the original time-stretched-pulse signal by a factor of K, wherein the original time-stretched-pulse signal has a period length n, and the expanded time-stretched-pulse signal has a period length n×K;
- acquisition means that acquires information about a frequency characteristic of an acoustic-transmission system that starts from the speaker and ends at a microphone, wherein the acquisition means acquires the frequency-characteristic information based on the expanded time-stretched-pulse signal filtered by the acoustic-transmission system and collected by the microphone;
- and
- sound-adjustment means that adjusts the sound signal to be output from the speaker based on analysis of the frequency-characteristic information acquired by the acquisition means.
A frequency-characteristic-acquisition device that inputs a time-stretched-pulse signal to a system to be measured and that acquires information about a frequency characteristic of the system based on a signal output from the system, the frequency-characteristic-acquisition device comprising:
- a storage unit that stores data representing an original time-stretched-pulse signal;
- a control unit that generates an expanded time-stretched-pulse signal and outputs the expanded time-stretched-pulse signal to the system, wherein the control unit generates the expanded time-stretched-pulse signal by up-sampling the original time-stretched-pulse signal by a factor of K, wherein the original time-stretched-pulse signal has a period length n, and the expanded time-stretched-pulse signal has a period length n×K;
- and
- an acquisition unit that analyzes the signal output from the system and that acquires the frequency-characteristic information.
A sound-signal-processing device comprising:
- a reproduction unit that reproduces a sound signal to be output from a speaker;
- a storage unit that stores data representing an original time-stretched-pulse signal;
- a control unit that generates an expanded time-stretched-pulse signal and outputs the expanded time-stretched-pulse signal from the speaker, wherein the control unit generates the expanded time-stretched-pulse signal by up-sampling the original time-stretched-pulse signal by a factor of K, wherein the original time-stretched-pulse signal has a period length n, and the expanded time-stretched-pulse signal has a period length n×K;
- an acquisition unit that acquires information about a frequency characteristic of an acoustic-transmission system that starts from the speaker and ends at a microphone, wherein the acquisition unit acquires the frequency-characteristic information based on the expanded time-stretched-pulse signal filtered by the acoustic-transmission system and collected by the microphone;
- and
- a sound-adjustment unit that adjusts the sound signal to be output from the speaker based on analysis of the frequency-characteristic information acquired by the acquisition unit.
Dependencies are inferred from the claim text.