The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2010
Filed:
Jan. 20, 2005
Sean M. Costello, Olympia, WA (US);
Timothy S. Stilson, Mountain View, CA (US);
Sean M. Costello, Olympia, WA (US);
Timothy S. Stilson, Mountain View, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A vehicle engine sound simulator includes a crossfade sample playback engine which produces an output waveform comprising at least two constituent waveforms which are transposed up and down in frequency with RPM. The playback engine's output waveform is provided to at least one digital signal processing (DSP) circuit, which processes the output with a function that varies with the rate of change of RPM, an external load value, and/or a combination of both to produce the simulator's output. The crossfade sample playback engine is arranged to crossfade between at least 2 wave samples as RPM changes. Wave samples from additional wave banks associated with different load states can also be mixed into the playback engine's output waveform. The DSP circuit can include both nonlinear and linear processing sections in various combinations.