Phoneme-Based Signal Authentication Across Transcoding Schemes
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Solution Overview
Problem
Digital signatures for changing signals, such as voice messages, are ineffective when transcoded, as the original signature generated in one encoding scheme cannot verify authenticity for recipients using different decoding schemes.
Innovation Solution
A signal transmission authentication apparatus and method that extracts phoneme data from received changing signals, generates comparison signals based on this data, and outputs authenticity signals, allowing for verification across different encoding schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital signatures are applied to changing signals using a specific encoding scheme, then authentication accuracy is improved, but compatibility with different decoding schemes deteriorates
Solution Approach 1:
The patent extracts phoneme data from the changing signal (voice message) to create a signature that is independent of the encoding scheme. By separating the essential linguistic content (phonemes) from the specific encoding format, the signature can be verified across different decoding schemes while maintaining authentication accuracy.
Solution Approach 2:
The patent creates a universal authentication mechanism that works across multiple encoding schemes (G.711, G.722, etc.). The phoneme-based signature approach allows the same authentication method to function universally regardless of the specific encoding or decoding scheme used by different parties in the communication.
2Adaptability or versatility
If transcoding is performed to enable communication between different encoding schemes, then adaptability is improved, but authentication reliability deteriorates
Solution Approach 1:
The patent performs preliminary extraction of phoneme data from the original signal before transcoding occurs. By creating the signature based on phoneme data extracted in advance, the authentication process is insulated from the effects of subsequent transcoding operations, maintaining reliability even when communication between different encoding schemes is required.
Data Source
AI summary
In one embodiment, a signal transmission authentication apparatus includes an input operable to receive a changing signal, a first extractor operable to extract first phoneme data from the received changing signal, a first generator including logic operable to generate first data representative of the extracted first phoneme data, a first output operable to communicate output data corresponding to the received changing signal and the first data from an associated transmitter to an associated receiver, a second extractor associated with the receiver including logic operable to extract second phoneme data from the received output data via the receiver and regenerate the first phoneme data from the received first data, a comparator including logic operable to generate a comparison signal in accordance with a comparison of the first and second phoneme data, and a second output operable to generate a signal corresponding to authenticity of the received changing signal in accordance with an output of the comparator.