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A delay detection method and device

A detection method and detection device technology, applied in speech analysis, digital transmission systems, instruments, etc., can solve problems such as the inability to detect delay drift in real time

Active Publication Date: 2019-07-02
SUZHOU KEDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pulse method is simple, it can only estimate the delay before the communication of the voice equipment, and cannot detect the delay drift in real time during its use

Method used

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  • A delay detection method and device

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Embodiment 1

[0033] This embodiment provides a delay detection method, such as Figure 1A shown, including the following steps:

[0034] S10: respectively collecting the first signal and the second signal from different signal terminals, and dividing them into frames.

[0035] S20: Calculate the first signal characteristic parameter of the preset frame number starting from the first predetermined signal frame of the first signal, calculate the second signal characteristic parameter of the preset frame number starting from the second predetermined signal frame of the second signal, and calculate the second signal characteristic parameter The square sum of a signal characteristic parameter and a second signal characteristic parameter, the first predetermined signal frame and the second predetermined signal frame are signal frames at the same time.

[0036] The first signal characteristic parameter and the second signal characteristic parameter are signal parameters capable of identifying sig...

Embodiment 2

[0064] This embodiment provides a delay detection device, such as Figure 2A As shown, it includes a collection frame unit 10 , a difference square sum calculation unit 20 , a minimum value acquisition unit 40 , a sequence number acquisition unit 50 and a delay calculation unit 60 .

[0065] The collecting and framing unit 10 is configured to separately collect the first signal and the second signal from different signal terminals, and divide them into frames.

[0066] The difference square and calculation unit 20 is used to calculate the first signal characteristic parameter of the preset frame number starting from the first predetermined signal frame of the first signal, and calculate the first signal characteristic parameter of the preset frame number starting from the second predetermined signal frame of the second signal. Two signal characteristic parameters, calculating the difference square sum of the first signal characteristic parameter and the second signal character...

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Abstract

The invention discloses a time delay detection method and device. The time delay detection method comprises the following steps: respectively collecting a first signal and a second signal from different signal terminals, and framing the first signal and the second signal; calculating the difference quadratic sum of a first signal characteristic parameter of a preset frame of the first signal taking a first predetermined signal frame as a starting frame and a second signal characteristic parameter of the preset frame of the second signal taking a second predetermined signal frame as a starting frame, wherein the first predetermined signal frame and the second predetermined signal frame are signal frames at the same moment; respectively calculating another second signal characteristic parameter of the preset frame taking the frame next to the second predetermined signal frame as the starting frame in a circulating manner, and calculating the difference quadratic sum of the first signal characteristic parameter and the second signal characteristic parameter; acquiring the minimum difference quadratic sum; if the minimum difference quadratic sum is smaller than a predetermined threshold value, acquiring the serial number of the starting frame, corresponding to the minimum value, of the second signal; and calculating the time delay value according to the serial number of the starting frame. The method and the device can detect the phenomenon of time delay in real time and calculate the time delay value.

Description

technical field [0001] The invention relates to the field of voice signal processing, in particular to a delay detection method and device. Background technique [0002] In many audio devices, such as video conferencing systems, there are often large delays, unstable delays, and even negative delays, which make the far and near end signals unable to align, and thus cannot perform better echo cancellation processing. There are many existing time delay detection methods, such as the pulse method, which presets pulses at the local terminal, plays them through the local playback terminal, and then collects them through the local acquisition terminal to obtain the time delay. Although the pulse method is simple, it can only estimate the time delay before the communication of the voice equipment, and cannot detect the time delay drift phenomenon in real time during its use. [0003] Speech feature parameters, including Linear Predictive Cepstral Coefficients (LPCC), Mel Frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L29/06G10L25/24G10L25/51
CPCG10L25/24G10L25/51H04L43/0852H04L65/403
Inventor 修平平刘焕鄢仁祥曹李军周秋芳
Owner SUZHOU KEDA TECH