Sound signal processing device
AssigneeSony Interactive Entertainment Inc.
InventorYoshihiko Tamaru
Life of this patent
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Abstract
A sound signal processing device that acquires a collected-sound signal obtained by sampling a sound collected by a microphone at a first sampling frequency, and receives a reproduced-sound signal obtained by sampling a sound for reproduction at a second sampling frequency different from the first sampling frequency, and then converts the sampling frequency of the reproduced-sound signal into the first sampling frequency so as to remove an acoustic echo from the collected-sound signal by using the reproduced-sound signal whose sampling frequency has been converted.
Claims11
A sound signal processing device comprising:
- an acquisition section that acquires a collected-sound signal obtained by sampling a sound collected by a microphone at a first sampling frequency;
- a reception unit that receives a reproduced-sound signal obtained by sampling a sound for reproduction at a second sampling frequency different from the first sampling frequency, where the reproduced-sound signal is a stereo signal having a first output channel and a second output channel for connection to respective first and second input channels of stereo headphones for a user in a physical space;
- a speaker sound quality adjustment section for producing an improved sound quality signal by performing equalization from only the second output channel of the reproduced-sound signal, wherein the improved sound quality signal is for connection to a speaker, separate from the stereo headphones in the physical space;
- a frequency conversion section that produces a converted improved sound quality signal by converting the second sampling frequency of the improved sound quality signal to the first sampling frequency;
- and
- an echo removal section that removes an acoustic echo caused by feedback from acoustic output from the speaker feeding into the microphone by cancelling such feedback as a function of the converted improved sound quality signal derived from only the second output channel of the reproduced-sound signal.
A sound signal processing method comprising:
- acquiring a collected-sound signal obtained by sampling a sound collected by a microphone at a first sampling frequency;
- receiving a reproduced-sound signal obtained by sampling a sound for reproduction at a second sampling frequency different from the first sampling frequency, where the reproduced-sound signal is a stereo signal having a first output channel and a second output channel for connection to respective first and second input channels of stereo headphones for a user in a physical space;
- producing an improved sound quality signal by performing equalization from only the second output channel of the reproduced-sound signal, wherein the improved sound quality signal is for connection to a speaker, separate from the stereo headphones in the physical space;
- producing a converted improved sound quality signal by converting the second sampling frequency of the improved sound quality signal to the first sampling frequency;
- and
- removing an acoustic echo caused by feedback from acoustic output from the speaker feeding into the microphone by cancelling such feedback as a function of the converted improved sound quality signal derived from only the second output channel of the reproduced-sound signal.
Dependencies are inferred from the claim text.