Audio tampering detection device based on time-frequency domain joint features

A technology of tamper detection and combined features, which is applied in speech analysis, instruments, etc., can solve problems such as low reference value, poor pertinence, and inability to form an effective database, achieving obvious advantages and high economical effects

Inactive Publication Date: 2015-11-04
NANJING INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide an audio tampering detection device based on time-frequency domain joint features, which solves the existing forgery, tampering of audio and the authenticity, complexity and security of voice, which cannot form an effective database, and the aim of detection Poor performance and low reference value

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  • Audio tampering detection device based on time-frequency domain joint features
  • Audio tampering detection device based on time-frequency domain joint features

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Embodiment Construction

[0019] The technical solution of the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0020] like figure 1 As shown, the audio tampering detection device based on time-frequency domain joint feature of the present invention comprises:

[0021] RFID authentication module: mainly used to realize identity identification and play a role in system control. The RFID authentication module is composed of RFID radio frequency card circuit and CLD3320 chip. RFID is a communication technology that can identify specific targets and read and write related data through radio signals without the need for mechanical or optical contact between the identification system and specific targets. The RFID wireless radio frequency card circuit uses RFID communication technology for early voice recording; CLD3320 is a voice recognition chip, mainly used for voice signal recognition and judgment. If the identification is correct, the i...

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Abstract

The invention discloses an audio tampering detection device based on time-frequency domain joint features. The device includes an RFID authentication module mainly used for identity authentication; a signal transmission module mainly used for communication with the RFID authentication module and a signal processing module; a signal processing module used for recording device recognition and voice tempering detection on received voice information, wherein voice tempering detection is mainly realized through a tempering detection algorithm of zero insertion for zero crossing rate, EM (Expectation Maximization) algorithm-based resampling voice tempering detection and LPC model-based initiative forensicvoice tempering detection; and recording device recognition is realized through BP neural network-based multimedia mobile equipment audio tempering recognition and detection. The device provided by the invention can store frequency spectruminformation in real time and has distinctive advantages in aspects of interference rejection, multi-band frequency and precision. The device provided by the invention has high economical efficiency, reliability and practical applicability.

Description

technical field [0001] The invention relates to an audio tampering detection device based on time-frequency domain joint features, and belongs to the technical field of voice signal processing. Background technique [0002] The 21st century is the era of information. The rapid development of social economy is inseparable from the rapid development of informatization. As an important part of information processing, voice signals are also playing an increasingly important role. With the rapid development of science and technology, speech signal processing technology is more and more widely used in all aspects of social life. Thanks to the emergence of various audio editing software, many people gain certain benefits by tampering with voice, which has a certain impact on social life. Therefore, the tamper detection technology for voice forensics came into being and quickly became an important research field of information security. In the commercial field, traders can defraud...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/30G10L25/24G10L25/51
Inventor 姜海涛武欣婷童茜雯曹柯杰
Owner NANJING INST OF TECH
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