| 摘要 |
<p>A computer processor that performs operations in a logarithmic number system (LNS) domain includes a log converter (20) which generates log signals, a data pipeline (22), a plurality of processing elements (231a-f) coupled to respective stages (24a-d) of the data pipeline, an inverse-log converter (28), and a programmable accumulator (232) that performs various summing operations to produce an output signal. An instruction, selected from a set of instructions, is decoded by a control unit (234) to configure the computer processor to perform operations on one or more data streams. Mathematical operations that can be performed by the processor include matrix multiplication, matrix-inversion, fast Fourier transforms (FFT), auto-correlation, cross-correlation, discrete cosine transforms (DCT), polynomial equations, and difference equations in general, such as those used to approximate infinite impulse response (IIR) and finite impulse response (FIR) filters. The computer processor can be used as a co-processor (340) in a general purpose computer system.</p> |
