Advanced Analysis Library Only
AnalysisLibErrType DCT (double inputArray[], int numberOfElements, int numberOfElementsInDCT, double outputArray[]);
Computes the one-dimensional Discrete Cosine Transform (DCT) of the input sequence inputArray, which is defined as follows:
and
where | numberOfElements is the length of inputArray |
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Input | ||
Name | Type | Description |
inputArray | double-precision array | The input sequence. |
numberOfElements | integer | The number of elements in inputArray. |
numberOfElementsInDCT | integer | The length of the DCT to be performed. If numberOfElementsInDCT is greater than numberOfElements, the function pads inputArray with zeros to make numberOfElements equal numberOfElementsInDCT. If numberOfElementsInDCT is less than numberOfElements, inputArray is truncated. Only the leading numberOfElementsInDCT elements in inputArray are used to perform the DCT. If numberOfElementsInDCT is less than or equal to zero, the function uses numberOfElements as numberOfElementsInDCT. |
Output | ||
Name | Type | Description |
outputArray | double-precision array | The DCT of inputArray. |
Name | Type | Description |
status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |