Yamaha‘s patented voice processing method involves adjusting audio signal gain based on probability values of voice presence, improving audio quality for far-end listeners. The method includes analyzing signals from multiple microphones to enhance sound reproduction. GlobalData’s report on Yamaha gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Yamaha, AR audio was a key innovation area identified from patents. Yamaha's grant share as of February 2024 was 62%. Grant share is based on the ratio of number of grants to total number of patents.
Voice processing method for improving audio quality in communication
A recently granted patent (Publication Number: US11922933B2) discloses a voice processing method that involves collecting audio signals from two microphones, estimating the probability of a person's voice in the signal, and determining the gain of the audio signal based on various factors. The method includes tasks such as estimating a correlation value between the audio signals, obtaining a time difference between waveforms, and processing the audio signal to enhance audio quality at the far-end side. The processed audio signal is then sent to a voice processing device for reproduction through a speaker. Additionally, the method accounts for factors like audio signal-to-noise ratio and adjusts the gain accordingly, with the possibility of gradual or instant changes in the gain based on specific conditions.
Moreover, the patent also covers a voice processing device and a non-transitory computer-readable memory storing a program for executing the voice processing method. The device includes two microphones, a memory storing instructions, and a processor to carry out tasks such as estimating the probability of a person's voice in the audio signal, setting probability values, determining gain, and processing the audio signal for improved audio quality. The device also considers factors like audio signal-to-noise ratio and adjusts the gain accordingly. The memory, executable by a computer, allows for the implementation of the voice processing method, including the estimation of probability, correlation value, time difference, and gain determination to enhance audio quality and facilitate sound emission from a speaker at the far-end side.
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