Computes the inverse Discrete Cosine Transform (DCT) of a sequence.
The real input sequence.
This input can be a 1D or 2D array of double-precision, floating-point numbers.
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
The inverse DCT of the real input sequence.
Error information.
The node produces this output according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
If y represents a 1D array as the input sequence DCT{x}, the one-dimensional inverse Discrete Cosine Transform of y is defined as:
and
where
This node applies a fast inverse DCT algorithm instead of calculating the inverse DCT directly. This node implements the fast inverse DCT algorithm using an FFT-based technique.
If y represents a 2D array as the input sequence DCT{x}, the two-dimensional inverse Discrete Cosine Transform of y is defined as:
where
This node performs a two-dimensional inverse DCT using the following two steps:
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application