Company Filing History:
Years Active: 1997-2008
Title: The Innovations of Adrian Freed
Introduction
Adrian Freed is a notable inventor based in Berkeley, CA. He has made significant contributions to the field of digital audio synthesis, holding 2 patents that showcase his innovative approaches to sound generation.
Latest Patents
One of his latest patents is titled "Apparatus and method of additive synthesis of digital audio signals using a recursive digital oscillator." This invention involves a method for performing additive synthesis of digital audio signals through a novel recursive digital oscillator. The process includes receiving digital audio signal frames that contain frequency, amplitude, and phase components represented as coefficients in a mathematical expression. The invention emphasizes the conversion of frequency coefficients to enhance audio reproduction accuracy, particularly for low-frequency signals.
Another significant patent is "Inverse transform narrow band/broad band sound synthesis." This invention presents an additive sound synthesis process that generates complex and realistic sounds efficiently. It achieves polyphony by dosing the energy of a given partial between separate transform sums for different channels. Additionally, the invention introduces noise injection by randomly perturbing the phase of the sound, enhancing the realism of the audio output. The use of various transforms, including the Hartley transform, allows for faster computations compared to traditional methods.
Career Highlights
Adrian Freed is affiliated with the University of California, where he continues to explore advancements in audio technology. His work has significantly impacted the way digital audio signals are synthesized and processed.
Collaborations
He has collaborated with notable colleagues such as Todd Hodes and John Reid Hauser, contributing to the advancement of audio synthesis technologies.
Conclusion
Adrian Freed's innovative patents and contributions to digital audio synthesis highlight his role as a leading inventor in the field. His work continues to influence the development of audio technologies, paving the way for future advancements.