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Random time sequence comparison method and device

A random time and sequence comparison technology, applied in voice analysis, instruments, electrical components, etc., can solve the problem that audio and video files are not easy to compare, and achieve the effect of reducing the amount of calculation and fast data comparison

Active Publication Date: 2017-03-22
CHINA ACADEMY OF INFORMATION & COMM
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Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide a random time series comparison method and device to solve the problem that audio and video files with large data volumes are not easy to compare

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  • Random time sequence comparison method and device
  • Random time sequence comparison method and device

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Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0022] figure 1 It is a flowchart of an embodiment of comparing two random time series with the method of the present invention; it specifically includes the following steps:

[0023] Enter the first random time series and the second random time series. Denoted as: the first random time series A(t Ai ,A i ), t Ai is the sampling time, A i for A ...

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Abstract

The invention discloses a random time sequence comparison method and device. The method comprises the steps of integrating a first random time sequence and a second random time sequence to form a first sequence composition function and a second sequence composition function; carrying out periodic sampling on the first composition function and the second composition function to form a first periodic sequence and a second periodic sequence; and calculating a correlation coefficient between the first periodic sequence and the second periodic sequence, and the correlation coefficient is used for comparing a first random sequence and a second random sequence. The device comprises an integrating unit, a periodic sampling unit, a correlation calculation unit and an audio / video processing unit. According to the method and the device, comparison and correlation calculation can be carried out on two randomly sampled time sequences with relatively low operation quantity. In particular, when the method or the system provided by the invention is applied to audio / video file comparison, the data comparison operation quantity can be clearly reduced, and the data comparison is realized rapidly.

Description

technical field [0001] The invention relates to digital signal processing, in particular to a method and device for comparing two random discrete signals in the time domain. Background technique [0002] Discrete signal processing is a frequently used method of signal processing. The usual discrete signal processing is mainly the time series obtained by periodic sampling and quantification, and the correlation analysis can compare two discrete signals. However, when comparing audio or video files, the comparison takes a long time due to the large amount of data in the files. If only some frames are sampled and compared, for example, only the basic frame (I frame) is sampled, a randomly sampled time sequence will be obtained. However, existing methods are difficult to process randomly sampled sequences, so by The present invention solves this problem. Contents of the invention [0003] In view of this, the object of the present invention is to provide a random time serie...

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Application Information

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IPC IPC(8): H04N21/234H04N21/44G10L25/51
CPCG10L25/51H04N21/23418H04N21/44008
Inventor 刘述段世惠田辉高巍徐贵宝
Owner CHINA ACADEMY OF INFORMATION & COMM
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