Pow2Fract32
Overview
Computes 2^x using a fast polynomial approximation.
Discussion
This module computes 2^x for fractional input values. The input is in Q6.26 and the output is in Q16.16. The module uses a polynomial based approximation to the pow2() function and the result is accurate to within 0.04 dB (when you look at the result on a db20 scale). The maximum error occurs for very small input values. Over most of the usable range the error is within 0.004 dB.
Type Definition
typedef struct _ModulePow2Fract32
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
} ModulePow2Fract32Class;
Pins
Input Pins
Name: in
Description: Input signal
Data type: fract32
Channel range: Unrestricted
Block size range: Unrestricted
Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: Output signal
Data type: fract32
MATLAB Usage
File Name: pow2_fract32_module.m
M = pow2_fract32_module(NAME)
Creates an Audio Weaver module that computes 2^x using a fast polynomial
approximation. The input is in Q6.26 format and the output is in
Q16.16 format. Arguments:
NAME - name of the module.