Clock asynchronization detection method, device and equipment

Abstract

The invention relates to a clock asynchronization detection method, device and equipment. The method comprises the following steps: acquiring a plurality of audio signal frames currently acquired by a microphone; if it is detected that the plurality of audio signal frames comprise suspected detection pulses, obtaining a first cross-correlation sequence corresponding to the suspected detection pulses, and adding the suspected detection pulses to an established suspected detection pulse group or newly establishing a suspected detection pulse group according to the suspected detection pulses; searching a target detection pulse group including detection pulses from all the suspected detection pulse groups; acquiring a second cross-correlation sequence between the first cross-correlation sequences corresponding to each pair of suspected detection pulses in the target detection pulse group; acquiring peak values of the second cross-correlation sequence, and acquiring a clock drift value according to the number of signal points spaced between two signal points corresponding to each peak value and the number of signal points spaced between each pair of detection pulses. Compared with the prior art, the method can effectively improve the accuracy and detection efficiency of clock asynchronization detection.

Description

technical field [0001] The embodiments of the present application relate to the field of computer technologies, and in particular, to a method, device, and equipment for detecting clock asynchrony. Background technique [0002] In medium and large conference rooms, the audio and video conferencing system usually has two electronic devices with local clocks, a microphone for collecting sound, and a speaker for playing the other party's voice. Under the influence of factors such as temperature changes and different physical and chemical environments, the clocks of the two devices will accumulate a certain clock offset. Therefore, in a remote conference, the audio conferencing system needs to establish a good clock synchronization mechanism to ensure the clock synchronization between the loudspeaker and the microphone. [0003] At present, most of the detection of clock drift is carried out by estimating the center frequency offset. This detection method needs to use a single-...

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Problems solved by technology

[0003] At present, most of the detection of clock drift is carried out by estimating the center frequency offset. This detection method needs to use a single-frequency effective synchronization signal with a certain window length, and frequency interpolation calculation is required during the detection process, which will lead to relatively high computational complexity. High, causing interference to conference calls, and the detection results are affected by noise

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