Digital signal processor for providing timbral change in arbitrary audio and dynamically controlled stored digital audio signals
AssigneeYield Securities, Inc.
InventorGregory Kramer
Life of this patent
Estimating the term…
Abstract
A digital audio signal processing technique in which the harmonic content of the output signal varies with the amplitude of an input signal. The preferred embodiment includes an analog to digital converter with sample and hold, a digital signal memory with playback control apparatus, timing circuits, a RAM look-up table to perform non-linear transformation and finally a digital to analog converter. The input signal, which can be an arbitrary audio signal or a digital signal representative of such a signal, is modified by a non-linear transformation means and outputted for reproduction in audible form or stored for subsequent processing.
Claims25
A digital audio signal processor comprising:
- input means for receiving input digital signals having values representative of the instantaneous amplitudes of arbitrary complex input audio signals;
- non-linear transformation means for translating on a real-time basis said input digital signals in accordance with a pre-determined translation map to produce output digital signals having a predetermined amplitude for each specified input digital signal amplitude;
- output means for transmitting output digital signals having values representative of the instantaneous amplitudes of arbitrary output audio signals, whereby arbitrary input audio signals are non-linearly modified by said non-linear transformation means and outputted in a form suitable for being reproduced in audible form.
A digital audio signal processor comprising:
- digital signal memory means for storing complex digital signals having values representative of the instantaneous amplitudes of arbitrary complex input audio signals;
- dynamic control means for selectively controlling on a real-time basis parameters of the digital signals stored in said digital signal memory means;
- non-linear transformation means for translating on a real-time basis input digital signals from said digital signal memory in accordance with a pre-determined translation map to produce output digital signals having a predetermined amplitude for each specified input digital signal amplitude;
- output means for transmitting output digital signals having values representative of the instantaneous amplitudes of arbitrary output audio signals, whereby arbitrary input audio signals are non-linearly modified by said non-linear transformation means and outputted in a form suitable for being reproduced in audible form.
Dependencies are inferred from the claim text.