Audio frequency comparison method

A technology of audio and audio data, which is applied in the field of rapid comparison of two pieces of audio data, and can solve problems such as heavy burden, time overhead, and no practical significance

Inactive Publication Date: 2012-11-21
NANJING TREDO INFORMATION TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two obvious deficiencies in this technology: First, the mass of audio sampling point data determines that the problem of point-by-point comparison of two long audio files is NP, and it is impossible to get the result quickly, which is not realistic. the meaning of
This method usually brings a large burden and time overhead to the user

Method used

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Embodiment Construction

[0076] Such as figure 1 As shown, the audio display and retrieval device acquires digital audio from the audio storage device. Assuming that the audio storage device stores several audio segments, the device accepts Num (Num≤16) segments of audio at the same time, and then the device generates a waveform feature display of the audio and provides playback Function, the user chooses two pieces of audio in Num pieces of audio as the comparison object, and the device generates the feature representation of the audio, using multiple features (audio sample data, audio waveform properties and energy matrix) to represent, so that each piece of audio has a feature value Vector representation, the comparison result is obtained and verified through the suffix array algorithm.

[0077] Such as figure 2 As shown, the Audio Quick Comparison section includes the following steps:

[0078] Step 1, divide the audio p and audio q to be compared into two groups of audio data feature segments o...

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Abstract

The invention discloses a rapid audio frequency comparison method. The audio frequency comparison part of the rapid audio frequency comparison method comprises the following steps of: reading an audio frequency p and an audio frequency q and marking off a feature segment set Cp of the audio frequency p and a feature segment set Cq of the audio frequency q; rapidly calculating an energy feature value sequence Wp of the feature segment set Cp of the audio frequency p and an energy feature value sequence Wq of the feature segment set Cq of the audio frequency q by utilizing a CUDA (Compute Unified Device Architecture) function on a GPU (Graphics Processing Unit); forming an energy matrix by a feature value of each feature segment according to the sequence of the feature segments; finding out a common feature segment set Seg of two feature value sequences by utilizing a suffix array deformation algorithm; rapidly scanning the common feature segment set Seg, finding out a communication region and using a set Vres returning to the communication region as an audio frequency comparison result; and marking the comparison result on an oscillogram.

Description

technical field [0001] The invention relates to an audio comparison method, which belongs to the fields of computer audio, multimedia information technology, pattern matching and the like, and particularly relates to a rapid comparison of two segments of audio data based on energy information extraction features in an audio database. Background technique [0002] With the development of computer technology, especially the realization of mass storage devices and large-capacity memory on PCs, it becomes possible to digitize audio media. The core of digital processing is the sampling of audio information, and various effects can be achieved by processing the collected samples. This is the basic meaning of digital processing of audio media. In order to check the differences between the processed audio file and the original file, how to quickly and accurately find the similarities and differences from two pieces of audio is one of the most basic and important issues in film and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 郭延文金国平余宗乔蒋安东顾学明董萱明
Owner NANJING TREDO INFORMATION TECH
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