Audio playing device and method with anti-noise mechanism

Abstract

The invention provides an audio playing device and method with an anti-noise mechanism. The audio playing device with an anti-noise mechanism comprises a radio circuit, a storage circuit, a filter control circuit, a filter circuit and an audio playing circuit. The sound receiving circuit receives sound receiving audio containing noise. The storage circuit stores filter parameters. The filter control circuit comprises a noise estimation circuit, a noise distribution judgment circuit and a parameter generation circuit. The noise estimation circuit receives the radio audio and calculates the static noise power spectrum density of the noise, so that the noise distribution judgment circuit judges the noise spectrum distribution according to the static noise power spectrum density. The parameter generation circuit analyzes the noise spectrum distribution and retrieves a set of selected filter parameters according to the noise spectrum distribution. The filter circuit filters the radio audio according to the set of selected filter parameters to generate an anti-noise audio. The audio playing circuit plays the actual audio and the anti-noise audio at the same time.

Description

technical field [0001] The invention relates to audio playback technology, in particular to an audio playback device and method with an anti-noise mechanism. Background technique [0002] In order to allow users to have a better listening effect when listening to music, many earphones are equipped with an anti-noise mechanism to prevent environmental noise from interfering with listening. In recent years, earphones are often equipped with an active anti-noise mechanism. The microphone receives the noise and filters it according to the filter coefficient to produce an anti-noise frequency of anti-phase to offset the influence of the noise. [0003] However, earphones are portable products, and the environmental noise they need to face will be significantly different depending on the environment in which they are used. Such as flying, walking on the road or being in the room, the noise heard is basically very different. The anti-noise architecture with fixed filter coefficie...

AI Technical Summary

Problems solved by technology

Anti-noise architecture with fixed filter coefficients may not be suitable for every application scenario

The adaptive anti-noise architecture that dynamically adjusts the respective filter coefficients at any time, since the goal is to minimize the sound received by the microphone, will have large differences when the microphone is worn in different positions, and cannot truly reflect the characteristics of the noise.

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