Charles P Nichols

US Patent:

42198801, Aug 26, 1980

Filed:

May 3, 1978

Appl. No.:

5/902455

Inventors:

Charles R. Nichols - Pasadena CA

Assignee:

Quad/Eight Electronics - N. Hollywood CA

International Classification:

G06F 1534
H03K 1302

US Classification:

364718

Abstract:

A signal-processing system, particularly adapted to digitally process analog signals, and including computation apparatus which carries out operations on the signals, also includes a control memory with storage locations addressable in predetermined sequences and an operand memory with storage locations addressable in variable sequences. The control memory contains control information which controls the operations of the computation apparatus and the operand memory contains operand information which is operated upon by the computation apparatus with the signals which are processed. The variable sequences in which the storage locations in the operand memory are addressed are in part determined by information in the control memory. The computation apparatus includes a multiplier, an adder, and a delay memory which is used in providing variable delays in signals during processing. The system is particularly adapted to provide digital reverberation effects, such as echo effects and the simulation of rooms (echo chambers) with variable characteristics.