Spatial reverberator
AssigneeNorthwestern University
InventorsGary Kendall, William Martens
Life of this patent
Estimating the term…
Abstract
A method and apparatus for processing audio signals utilizing reverberation in combination with directional cues to capture both the temporal and spatial dimensions of a three-dimensional natural reverberant environment. Reverberant streams are generated and directionalized to simulate a selected model environment utilizing pinna cues and other directional cues to simulate reflected sound from various spatial regions of the model environment.
Claims47
Sound processing apparatus for creating illusory sound sources in three dimensional space comprising:
- means for providing audio signals;
- reverberation means for generating at least one reverberant stream of signals from the audio signals to simulate a desired configuration of reflected sound;
- and,
- directionalizing means for applying to at least part of one reverberant stream a spectral directional cue to generate at least one output signal.
A method for processing input audio signals to generate output reverberant streams at an output, comprising the steps of:
- combining the input audio signals with a first feedback signal to produce a first combined signal;
- providing delay and feedback control of the combined signal to produce a delayed signal and providing delay and feedback control of the delayed signal to produce a dual delayed signal;
- utilizing the dual delayed signal as the first feedback signal;
- and,
- combining at the output the dual delayed signal and the delayed signal to produce an output reverberant stream having a recurring pattern of reverberation with two different delays.
A spatial reverberation system for simulating the spatial and temporal dimensions of reverberant sound, comprising:
- means for processing audio signals utilizing a spectral directional cue to produce at least one directionalized audio stream including reverberant audio signals providing a selected spatio-temporal distribution of illusory reflected sound;
- and,
- means for outputting the audio stream.
Reverberation apparatus comprising:
- means for providing audio signals;
- means for generating and outputting a plurality of different reverberation streams responsive to the audio signals wherein at least a first reverberant stream is separately and independently fed to a second one of said reverberant streams and utilized to generate said second one of said reverberant streams which is utilized exclusively as an output stream which is fed back to another one of said reverberant streams other than said first reverberant stream.
A method for processing input audio signals to generate reverberant streams, comprising the steps of:
- combining the input audio signals with a first feedback signal to produce a first combined signal;
- providing delay and feedback control of the combined signal to produce a delayed signal and providing delay and feedback control of the delayed signal to produce a dual delayed signal;
- utilizing the dual delayed signal as the first feedback signal;
- combining the dual delayed signal and the delayed signal to produce a first reverberant stream having a recurring pattern of reverberation with two different delays,
- combining the input audio signal and a second feedback signal to produce a second combined signal;
- providing delay and feedback control of the second combined signal to produce a second reverberant stream;
- and,
- utilizing the second reverberant stream as the second feedback signal.
Sound processing apparatus comprising:
- means for input of source audio signals;
- reverberation means for generating at least one reverberant stream of signals comprising delayed source audio signals to simulate a desired configuration of reflected sounds;
- first directionalizing means for applying to at least part of said one reverberant stream a directionalizing transfer function to generate at least one directionalized reverberant stream;
- and
- means for combining at least said one directionalized reverberant stream and the source audio signal, which is not directionalized by the first directionalizing means, to generate an output signal.
Sound processing apparatus for modelling of a selected model room comprising:
- means for providing audio signals
- means responsive to the audio signals for producing a plurality of reverberant streams comprising a plurality of simulated reflections with calculated delay times and with each reverberant stream directionalized with calculated spectral directional cues so as to simulate time of arrival and direction of arrival base upon calculated values determined for the selected model room and selected source and listener locations within the model room.
Reverberation apparatus comprising:
- means for providing audio signals;
- means for generating and outputting a plurality of different reverberation streams responsive to the audio signals wherein at least a first reverberant stream is separately and independently fed to a second one of said reverberant streams and utilized to generate said second one of said reverberant streams which is utilized exclusively as an output stream which is fed back to another one of said reverberant streams other than said first reverberant stream, and wherein the means for generating comprises means having an input for generating at least one of said reverberant streams by producing a delayed and a dual delayed signal responsive to the audio signals with two different delay paths and feeding back only the dual delayed signal to the input and for combining the delayed and the dual delayed signal to produce the one of said reverberant streams.
A method of processing sound signals comprising of steps of:
- generating at least one reverberant stream of audio signals simulating a desired configuration of reflected sounds;
- and,
- superimposing at least one spectral directional cue on at least part of one reverberant stream.
Dependencies are inferred from the claim text.