Recording Device Identification Based on Cepstral Mixed Features

Abstract

The authenticity of the recording evidence is the foundation of legitimacy and relevance, which is the primary condition of recording evidence. With the springing up of private recording evidence, there is an urgent need for authenticity identification of recordings. That the evidence shall be from an accurate and legitimate source is a prerequisite for three elements. Recording equipment identification is the core content of sources of evidence. This article studies the characteristics of the recording device parameters, proposing three characteristic parameters of recording equipment such as the proportion of time-domain low roughness, etc. And combined with improved Mel Frequency Cepstrum Coefficient (MFCC) feature parameters characteristic parameters constitute a hybrid 92-dimensional. According to experimental analysis, with 10 different brands and models of recording device (including five different brands and models commonly used in voice recorder and five kinds of commonly used different brands and models of mobile phones), 60 young men and women, each of 10 different voice, the same type of equipment to record each 2, shows that mixed characteristic parameters can effectively characterize the characteristics of the recording equipment. Recognition rate increases by more than 6% compared with ordinary cepstrum.