Signal capture method and device and USB key

Abstract

The invention provides a signal capture method and device and a USB key. The signal capture method and device and the USB key are suitable for the technical field of voice communication. The method includes the steps that data streams sent by a mobile terminal are received, wherein the data streams include audio analog signals with different starting phase types; a rising edge capture mode and a falling edge capturing mode are started at the same time, synchronous heads in the audio analog signals are captured through the rising edge capturing mode, the captured synchronous heads are converted to generate first synchronous codes, the synchronous heads in the audio analog signals are captured through the falling edge capturing mode, and the captured synchronous heads are converted to generate second synchronous codes; whether the generated first synchronous codes and a preset synchronous node are the same or not is detected, if yes, the rising edge capturing mode is configured to capture the audio analog signals, or whether the generated second synchronous codes and the preset synchronous node are the same or not is detected, if yes, the falling edge capturing mode is configured to capture the audio analog signals.

Description

technical field [0001] The invention belongs to the technical field of audio communication, and in particular relates to a signal capturing method, device and U-shield. Background technique [0002] The audio key is the carrier of the digital certificate used to identify the identity in the network environment. It can receive the audio analog signal sent by the mobile terminal, and provide protection functions such as secure signature authentication and secondary confirmation for online banking payment. There are two start phase types of the audio analog signal output by the mobile terminal, namely a high start phase type and a low start phase type. [0003] refer to figure 1 , figure 1 is a sample diagram of a high initial phase; [0004] refer to figure 2 , figure 2 is a sample diagram of the low initial phase; [0005] Usually, when the mobile terminal communicates with the audio key, the audio key receives the audio analog signal sent by the mobile terminal, then...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a signal capture method, aiming at solving the problem that existing users cannot determine the capture mode of audio analog signals of different start phase types. There is a problem of capturing different audio analog signals into one code value, and the subsequent Errors in decoding audio analog signals lead to problems that reduce the efficiency and accuracy of audio key decoding

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