Far-field voice module echo cancellation circuit and device

Abstract

The invention discloses a far-field voice module echo cancellation circuit and device. The far-field voice module echo cancellation circuit is connected with a television main board, and comprises aninterface module, a filtering module, a voice conversion module and a voice control module, wherein when a television is of a double-power-amplifier structure, the interface module outputs a first level signal to the voice control module, and then the voice control module outputs a first control signal to the voice conversion module, and the interface module is controlled to receive a first echo reference signal and a second echo reference signal at the same time; when the television is of a single power amplifier architecture, the interface module outputs a second level signal to the voice control module, so that the voice control module outputs a second control signal to the voice conversion module, and the interface module is controlled to receive a second echo reference signal; and thefiltering module carries out filtering processing on the first echo reference signal and the second echo reference signal to realize echo cancellation, so that the effect of effectively improving echo cancellation while being compatible with a single power amplifier architecture is realized.

Description

technical field [0001] The invention relates to the technical field of smart TVs, in particular to a far-field voice module echo cancellation circuit and device. Background technique [0002] Artificial intelligence TV has become an explosive point in recent years. As a voice entrance, far-field voice technology is becoming more and more popular in TVs. The English for echo cancellation is Acoustic Echo Cancellation, referred to as AEC. Echo cancellation is to eliminate its own sound source. When using a TV, not only the user will make a sound when the user sends an instruction, but the TV itself will also make a sound; but if the far-field voice module only responds to the user The sound of speaking, without responding to the sound from its own speaker, will further optimize the sound effect. Therefore, echo cancellation is to eliminate the sound signal from the TV speaker from the sound signal collected by the microphone through a specific algorithm after the sound signal...

AI Technical Summary

Problems solved by technology

However, the current design of the far-field voice module can only take the signal of the middle and low frequency range for echo cancellation, and does not perform echo cancellation for the signal of the high frequency range, resulting in poor echo cancellation effect, low wake-up rate, and poor user experience.

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