The DCT
object computes the discrete cosine
transform (DCT) of input.
To compute the DCT of input:
Define and set up your DCT object. See Construction.
Call step
to compute the DCT according to the properties
of dsp.DCT
. The behavior of step
is
specific to each object in the toolbox.
Note:
Starting in R2016b, instead of using the 
H = dsp.DCT
returns
a discrete cosine transform (DCT) object, H
, used
to compute the DCT of a real or complex input signal.
H = dsp.DCT('
returns a DCT object, PropertyName
',PropertyValue
,
...)H
, with each
property set to the specified value.

Method to compute sines and cosines Specify how the DCT object computes the trigonometric values
as 
clone  Create discrete cosine transform object with same property values 
getNumInputs  Number of expected inputs to step method 
getNumOutputs  Number of outputs of step method 
isLocked  Locked status for input attributes and nontunable properties 
release  Allow property value and input characteristics changes 
step  Discrete cosine transform (DCT) of input 
This object implements the algorithm, inputs, and outputs described on the DCT block reference page. The object properties correspond to the block parameters.