Noise eliminating system and method, intelligent control method and device, and communication equipment

Abstract

The invention discloses a noise eliminating system and method, an intelligent control method and device, and communication equipment, wherein the intelligent control method comprises the following steps of: in the event of detecting that a receiving end of the communication equipment does not have voice signal output, receiving outside noise signals from a reference microphone away from ears and monitoring signals from a monitoring microphone near the ears; carrying out performance analysis on the received outside noise signals and monitoring signals, and estimating a noise reduction performance curve subjected to feed-forward active noise estimation process; and adjusting parameters of a control circuit in the feed-forward active noise estimation process according to the noise reduction performance curve and a pre-set noise reduction performance curve, so that the difference between the estimated noise reduction performance curve and the pre-set noise reduction performance curve is within a pre-set range. By means of the noise eliminating system and method, the intelligent control method and device, and the communication equipment disclosed by the invention, the noise reduction stability in the communication equipment can be effectively increased; and the noise reduction performance inconsistency of the communication equipment in the use process because of ear coupled difference can be avoided.

Description

technical field [0001] The present invention relates to the technical field of noise cancellation at the receiving end of communication equipment, and more specifically, to a non-closed feedforward active noise cancellation system, a non-closed active noise cancellation method, and a non-closed feedforward active noise cancellation system. An intelligent control method and device in active noise cancellation, and a communication device with the aforementioned non-closed feedforward active noise cancellation system. Background technique [0002] The improvement of social informatization has enabled people to communicate and communicate anytime and anywhere. The wide application of various communication devices (mobile phones, Bluetooth headsets, stereo headsets, etc.) and technologies has greatly facilitated people's lives and improved work efficiency. However, a serious problem brought about by the development of society is the noise problem. Communication in a noisy enviro...

AI Technical Summary

Problems solved by technology

The method to solve this inconsistent noise reduction performance is currently mainly to use DSP (digital signal processing) for adaptive active noise cancellation, but there are two aspects when this technology is applied to communication devices such as mobile phones, non-enclosed Bluetooth, and stereo headphones. limitations

On the one hand, the feed-forward adaptive noise elimination algorithm adopts the FX-LMS algorithm, which requires the identification of the secondary channel G to obtain G, and the identification error of the secondary channel will directly affect the stability of the system. The above-mentioned non-closed communication The secondary channel G itself will change greatly during the use of the system, so the stability of the algorithm is difficult to guarantee

On the other hand, for communication devices such as mobile phones, non-enclosed Bluetooth, and stereo headsets, due to the volume limitation of the communication devices themselves, the time delay of the acoustic channel P is very small. If DSP is used for adaptive noise cancellation, the system sampling rate The requirements are very high, and the system power consumption and noise reduction frequency band will be very limited

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