# InvDCT

Advanced Analysis Library Only

AnalysisLibErrType InvDCT (double inputArray[], int numberOfElements, double outputArray[]);

## Purpose

Computes the one-dimensional inverse Discrete Cosine Transform (DCT) of the input sequence. If inputArray represents the input sequence of DCT{x}, the one-dimensional inverse DCT of inputArray is defined as follows:

where

y denotes inputArray, x denotes outputArray, and N denotes numberOfElements.

## Parameters

Input
Name | Type | Description
inputArray | double-precision array | The input sequence.
numberOfElements | integer | The number of elements in inputArray.
Output
Name | Type | Description
outputArray | double-precision array | The inverse DCT of inputArray.

## Return Value

Name | Type | Description
status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants.