Multi-sound-source automatic gain control method based on sound field perception

• Main Authors: ZHU YANGYAN, WANG JUN, CHEN SHUQIAN, LU JIAXIN
• Format: Patent
• Language: Chinese; English
• Published: 04.08.2023
• Subjects: ACOUSTICS; MUSICAL INSTRUMENTS; PHYSICS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

The invention discloses a multi-sound-source automatic gain control method based on sound field perception. The method comprises the steps of space initialization and multi-sound-source automatic gain initialization. Converting the plurality of microphone signals into a frequency domain through short-time Fourier transform; the signal-to-noise ratio of the sound source angle of each area is obtained; selecting a sound source playing a leading role at the frequency point; iteratively solving sound source space propagation parameters of different areas at the current moment; calculating the inter-frame similarity of the sound source time-space distribution at the current moment; energy tracking of the sound source is updated, and space automatic gain is obtained; calculating the automatic compensation gain of the frequency band by using the reverberation level of the Mel filter bank; spatial gain is obtained through calculation and acts on a frequency spectrum, and processed audio is obtained through short-time