Symmetrical ternary string represented voice perception Hash sequence constructing and authenticating method

Abstract

The invention discloses a symmetrical ternary string represented voice perception Hash sequence constructing and authenticating method. The method comprises the steps that firstly, overall discrete wavelet transforming (DWT) is carried out on voice signals produced after preprocessing and intensity-loudness transformation (ILT); secondly, non-overlapping partitioning is carried out on the low-frequency part of the voice signals produced after DWT, and short-time logarithm energy of blocks is calculated to obtain the signal frequency-domain features; lastly, a final ternary perception Hash sequence is generated based on the time domain spectrum flux features (SFF) of the voice signals, and the voice frequency content is quickly authenticated through Hash matching. The symmetrical ternary string representation of the perception Hash abstract is superior to that of the binary form, the common voice content is operated between the robustness and the difference in a balanced mode, the time complexity of the algorithm is low, efficiency and the abstraction are high, precise manipulation detecting and positioning can be achieved, and the method can be used for authenticating a mobile voice communication terminal with bandwidth resources limited in real time.

Description

technical field [0001] The invention belongs to the field of multimedia information security, and in particular relates to a voice perception hash sequence construction and authentication method represented by a symmetrical ternary string. The invention adopts the symmetrical ternary string to construct the perceptual hash sequence, which can be effectively applied to realize content authentication, speaker authentication and retrieval in the process of mobile voice communication call, and can realize small-scale tampering detection and positioning. Background technique [0002] With the rapid development of information technology and Internet technology, audio digital works can be recorded, disseminated and preserved indefinitely, playing an important role in the long-distance communication system. However, people can edit and modify digital products with the help of multimedia software (such as Cool Edit), coupled with the openness of communication channels such as wireles...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a voice-aware hash sequence construction and authentication method represented by a symmetrical ternary string, which solves the problem of small-scale tampering and positioning of the voice-aware hash authentication algorithm, overcomes the weakness of the binary hash sequence, and effectively Improve the efficiency of the authentication algorithm

Images