| DSP Blockset | |
Compute the IDCT of the input.
Library
Description
The IDCT block computes the inverse discrete cosine transform (IDCT) of each channel in the M-by-N input matrix, u.
y = idct(u) % Equivalent MATLAB code
For both sample-based and frame-based inputs, the block assumes that each input column is a frame containing M consecutive samples from an independent channel. The frame size, M, must be a power-of-two. To work with other frame sizes, use the Zero Pad block to pad or truncate the frame size to a power-of-two length.
The output is an M-by-N matrix whose lth column contains the length-M IDCT of the corresponding input column.
The output is always frame-based, and the output sample rate and data type (real/complex) are the same as those of the input.
For convenience, length-M 1-D vector inputs and sample-based length-M row vector inputs are processed as single channels (i.e., as M-by-1 column vectors), and the output has the same dimension as the input.
Dialog Box
See Also
| DCT |
DSP Blockset |
| IFFT |
DSP Blockset |
idct |
Signal Processing Toolbox |
| | Histogram | Identity Matrix | |
