System and method for generating an identification signal for electronic devices
AssigneeNellymoser, Inc.
InventorsJohn D. Puterbaugh, Eric J. Puterbaugh, Peter Velikonja, Robert A. Baxter
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Abstract
A system and method for creating a ring tone for an electronic device takes as input a phrase sung in a human voice and transforms it into a control signal controlling, for example, a ringer on a cellular telephone. Time-varying features of the input signal are analyzed to segment the signal into a set of discrete notes and assigning to each note a chromatic pitch value. The set of note start and stop times and pitches are then translated into a format suitable for controlling the device.
Claims14
A method for generating an identification signal, comprising:
- accepting as input a voice signal of limited duration;
- translating said voice signal to a representation of a series of discrete tones, including generating a digital representation of said voice signal, dividing said digitized signal into a plurality of frames, extracting analysis data from each said frame, and formatting said analysis data into a frame representation;
- and
- producing a control signal from said representation of discrete tones, said control signal suitable for causing a transponder to generate a signal, where said generated signal is human-recognizable as a translation of said voice signal;
- wherein said frame representation further comprises a plurality of signal parameters including a time-domain energy measure, a fundamental frequency value, cepstral coefficients, and a cepstral-domain energy measure.
The method of claim 11 further comprising the step of determining said cepstral-domain energy measure by determining a short-time cepstral gain with the mean value removed, said short-time cepstral gain normalized by the maximum gain over all frames.
An apparatus for generating an identification signal composing:
- a voice signal receiver;
- and
- a translator having as its input a voice signal received by said voice signal receiver and having as its output a representation of discrete tones where an audio presentation of said discrete tones would be human-recognizable as a translation of said voice signal;
- wherein said translator further comprises a feature estimation module to determine values for at least one time-varying feature of said input signal;
- wherein said feature estimation module further comprises a primary feature module, a secondary feature module and a tertiary feature module;
- and
- wherein said secondary feature module determines a plurality of values for each of the secondary features of short-term average change in energy, short-term avenge change in fundamental frequency, short-term avenge change in cepstral coefficient, and short-term average change in cepstral-domain energy.
Dependencies are inferred from the claim text.