Processing apparatus, processing method, program, computer readable information recording medium and processing system

A processing method of estimating a noise amplitude spectrum of noise included in a sound signal, the processing method comprising:

• calculating an amplitude spectrum of the sound signal for each of frames obtained from dividing the sound signal into units of time;
• and
• estimating the noise amplitude spectrum of the noise detected from the frames, wherein
• the estimating includes
• estimating a noise amplitude spectrum based on a difference between the amplitude spectrum of a currently processed frame calculated by the calculating and the amplitude spectrum of a previously processed frame occurring before the noise is detected by a noise detection apparatus, and
• estimating a noise amplitude spectrum based on an attenuation function calculated from noise amplitude spectra of a plurality of frames occurring after the noise is detected by the noise detection apparatus.

A non-transitory computer readable information recording medium storing therein a program for causing a computer to carry out a processing method of estimating a noise amplitude spectrum of noise included in a sound signal, the processing method comprising:

• calculating an amplitude spectrum of the sound signal for each of frames obtained from dividing the sound signal into units of time;
• and
• estimating the noise amplitude spectrum of the noise detected from the frames, wherein
• the estimating includes
• estimating a noise amplitude spectrum based on a difference between the amplitude spectrum of a currently processed frame calculated by the calculating and the amplitude spectrum of a previously processed frame occurring before the noise is detected by a noise detection apparatus, and
• estimating a noise amplitude spectrum based on an attenuation function calculated from noise amplitude spectra of a plurality of frames occurring after the noise is detected by the noise detection apparatus.

A processing apparatus, comprising:

• circuitry configured to
• calculate an amplitude spectrum of a sound signal for each of frames obtained from dividing the sound signal into units of time, and
• estimate a noise amplitude spectrum of noise detected from the frames, wherein
• the circuitry is configured to
• estimate a noise amplitude spectrum based on a difference between the amplitude spectrum of a currently processed frame calculated by the circuitry and the amplitude spectrum of a previously processed frame occurring before the noise is detected by a noise detection apparatus, and
• estimate a noise amplitude spectrum based on an attenuation function calculated from noise amplitude spectra of a plurality of frames occurring after the noise is detected by the noise detection apparatus.