Spectrogram software for yielding high-definition timbre spectra

Unmet Need: Software that generates timbre spectra using pitch-synchronous segmentation

Current software for audio analysis generates timbre spectra using pitch asynchronous methods that fail to separate pitch and timbre completely. With these methods, voice recordings are segmented into frames of 10 to 50 milliseconds and Fourier transformed to yield a timbre spectrum for each frame. When frame size is shifted, timbre spectra become inconsistent because pitch and timbre are always mixed. There is currently no software that separates pitch and timbre completely to yield accurate timbre spectra.

The Technology: Software for generating reliable, high-definition timbre spectra

This technology is a software for generating reliable timbre spectra by separating pitch and timbre completely. This software can analyze a recorded signal of speech and generate segments based on whether the sections are voiced or unvoiced. It uses a method of pitch-synchronous segmentation by sensing glottal closing instants to generate pitch periods. Each pitch period is processed via the software’s algorithm and Fourier transformed, yielding accurate, high-definition pitch and timbre spectra.

Applications:

Generating high quality timbre spectra
Computation and display of power-decay pattern in each pitch period
Segmenting a vocal recording into pitch periods solely based on voice signals
Improving and inventing speech and voice technology

Advantages:

Complete separation of pitch and timbre
Generation of accurate timbre spectra
Easy to decipher formant frequencies and peak profiles
Easy to use interface, which displays power decay and timbre spectra with a click on spectrogram
Glottal closing instants as pitch period parameter (pitch synchronous segmentation)

Lead Inventor:

Julian Chengjun Chen, Ph.D.

Patent Information:

Patent Pending

Related Publications:

Tech Ventures Reference:

IR CU18357
Licensing Contact: Richard Nguyen