Biometric audio security
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United States of America Patent
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Jun 13, 2017
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app pub date -
Feb 19, 2014
filing date -
Feb 19, 2013
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Abstract
A biometric audio security system comprises providing an input voice audio source. The input audio is enhanced in two or more harmonic and dynamic ranges by re-synthesizing the audio into a full range PCM wave. A hardware key with a set of audio frequency spikes (identifiers) with varying amplitude and frequency values is provided. The enhanced voice audio input and the key using additive resynthesis are summed. The voice and the spike set is compared against the users identification signature to verify user's identity. The set of audio spikes are user specific. The spikes are stored on the protected key device as a template, which would plug into the system. The template is determined by the owner/manufacturer of the system. The spikes are created and identified using the additive synthesis technique with a predetermined number of partials (harmonics). The identifiers include both positive and negative values. The amplitude and frequency values are spaced in very fine intervals. The enhancing of voice audio input includes the parallel processing the input audio as follows: A module that is a low pass filter with dynamic offset;
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