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Heterogenous audio frequency splicing tampering blind detection method based on mute segment

A silent segment and blind detection technology, applied in speech analysis, instruments, etc., can solve the problems of insufficient positioning accuracy and low accuracy rate, and achieve the effects of accurate audio features, low complexity, and high application flexibility

Inactive Publication Date: 2017-07-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing blind detection method of heterogeneous audio splicing and tampering, such as low accuracy rate and insufficient positioning accuracy, and provide a blind detection method for heterogeneous audio splicing and tampering based on silent segments with high accuracy and high positioning accuracy

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  • Heterogenous audio frequency splicing tampering blind detection method based on mute segment
  • Heterogenous audio frequency splicing tampering blind detection method based on mute segment
  • Heterogenous audio frequency splicing tampering blind detection method based on mute segment

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0042] The implementation process of the present invention will be described in detail below with a section of audio in WAV format as a preferred embodiment. Such as figure 2 As shown, the audio is spliced ​​by two pieces of audio. The first piece is the audio recorded by the Apple iPhone5 mobile phone with a duration of 6.049 seconds, and the latter section is the audio recorded by the Samsung E2600 mobile phone with a duration of 7.818 seconds. The sampling rate is 16kHz. The duration of the tampered audio is 13.867 seconds, and the splicing and tampering point is at the 6.049th second of the audio to be tested.

[0043] Such as figure 1 As shown, the method of the present invention is mainly divided into six steps, including framing and windowing of audio, detecti...

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Abstract

The invention discloses a heterogenous audio frequency splicing tampering blind detection method based on a mute segment; the method comprises the following steps: enframing and windowing a to-be-tested audio frequency; carrying out threshold determination on audio frequency frame frequency spectrum energy and zero-crossing rate, and detecting the mute segment; calculating mute segment audio frequency characteristics; using a slide window to solve an adjacent mute frame audio frequency characteristic correlation coefficient vector on the mute segment; detecting a tempering point; determining a tampering position. The method needs not to use the digit watermark as embedded information, and can effectively determine whether tampering exists or not and locate the specific tamping position while aiming at the heterogenous audio frequency splicing and insert operations on the time domain.

Description

technical field [0001] The present invention relates to the technical field of audio forensics, in particular to a method for blind detection of heterogeneous audio splicing and tampering based on silent segments. Background technique [0002] Audio splicing is one of the most common forms of audio manipulation. With the popularity of portable recording equipment and the emergence of various powerful multimedia editing software, it is very important to detect the authenticity of audio. Blind digital audio forensics, as a method of audio data forensics, does not need to add digital watermarks for detection, which is more practical and has broad application prospects in judicial forensics and news information authenticity identification. [0003] In the research field of digital audio tampering blind detection, the current popular methods are mainly based on electric network frequency (Electric Network Frequency, ENF) and based on audio features (eg, speech features, intrinsi...

Claims

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Application Information

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IPC IPC(8): G10L25/06G10L25/27G10L25/48G10L25/51
CPCG10L25/06G10L25/27G10L25/48G10L25/51
Inventor 胡永健梁富文刘琲贝王宇飞
Owner SOUTH CHINA UNIV OF TECH
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