Pixar

Alex Stahl

Lanny Starkes Smoot

Karon A Weber

Maxwell Oliver Drukman

Loren C Carpenter

Brendan Donohoe

Michael Boyle Johnson

Philip Bradley Bird

Antoine McNamara

Methods and techniques to implement a digital signal processor for avoidance of audio feedback are disclosed, in particular, audio signal processing systems that reduce the requirement for physical segregation of sound acquisition and diffusion zones. In a more general aspect, the components and techniques described herein provide a for a sound space and sound processing equipment such that sound travelling electronically in a loop through the sound processing equipment that is output into a physical sound diffusion zone, received at the input to the sound processing equipment, and then re-amplified, etc. is attenuated over that loop by frequency modification. The frequency modification is such that, at least for some signals, on each pass through the loop, the sound processing equipment will attenuate or amplify individual sub-bands of the frequency spectrum of the audio signal that is received at the input of the sound processing equipment. The frequency range of each individual sub-band is modified as it passes through the sound processing equipment, transformed into sound in the physical space, picked up again by the sound processing equipment, and then passes through again, so that the sub-band is attenuated on at least one of those passes through the sound processing equipment. The attenuation can be performed by configuring the sound processing equipment to amplify some input frequencies and shift those frequencies to other frequencies that the sound processing equipment is configured to attenuate.

Avoiding audio feedback

A system comprises a source providing video in a first format, a video converter for converting video from the first to a second format, a server storing a video image from the video, and combining the video image with a graphical user interface to form a composite video, and a first user display device displaying the composite video, and receiving from the user, a plurality of commands, wherein the first user display device is for receiving from the user, a plurality of annotations associated with a video frame from the composite video, and for determining the video frame from the composite video in response to a command, wherein the server is for forming an annotated video in response to the video frame and the plurality of annotations, for storing the plurality of annotations and the video frame, and for associating the plurality of annotations and the video frame.

Animation review methods and apparatus

Growing community of inventors

Emeryville, CA, United States of America

Alex Stahl