RTX A/S (20240404543). JOINT FAR-END AND NEAR-END SPEECH INTELLIGIBILITY ENHANCEMENT
Contents
JOINT FAR-END AND NEAR-END SPEECH INTELLIGIBILITY ENHANCEMENT
Organization Name
Inventor(s)
Andreas Jonas Fuglsig of Nørresundby (DK)
JOINT FAR-END AND NEAR-END SPEECH INTELLIGIBILITY ENHANCEMENT
This abstract first appeared for US patent application 20240404543 titled 'JOINT FAR-END AND NEAR-END SPEECH INTELLIGIBILITY ENHANCEMENT
Original Abstract Submitted
the invention relates to a computer implemented method for generation of a speech intelligibility enhancement algorithm for a wireless two-way communication system to enhance speech intelligibility in noise at both a near-end and a far-end taking into account joint near-end and far-end noise and audio inputs at the far-end from multiple microphones to capture speech and noise. first, determining (d_si_ot) a speech intelligibility optimization target, taking into account noise at the near-end and noise at the far-end. next, determining (d_mvdr) a minimum variance distortionless response (mvdr) beamformer with a plurality of inputs by optimizing a cost function according to the speech intelligibility optimization target to determine a global optimum. next, determining (d_fb_g) a set of frequency band dependent gains by optimizing a cost function according to the speech intelligibility optimization target to determine a global optimum of a concave optimization formulation. finally, generating (g_sie_a) the speech enhancement processing algorithm as a linear processor with the determined mvdr beamformer followed by the determined set of frequency band dependent gains. in this way, a simple technical-mathematical formulation has been achieved, and the resulting speech intelligibility enhancement is similar to related but complex prior art solutions. the resulting algorithm is suited for wireless two-way communication devices, such as intercom devices to be used in noisy environments. e.g. for firefighters, rescue personnel etc.
