dct#

Perform a Direct Cosine Transform (DCT)

Note

These functions are currently not supported with host-based executors (CPU)

template<typename OutputTensor, typename InputTensor>
void matx::dct(OutputTensor &out, const InputTensor &in, const cudaStream_t stream = 0)#

Discrete Cosine Transform

Computes the DCT of input sequence “in”. The input and output ranks must be 1, and the sizes must match. This implementation uses the 2N padded version of Makhoul’s method which offloads the complex processing to cuFFT.

Template Parameters:

  • T – Input data type

  • RANK – Rank of input and output tensor. Must be 1

Parameters:

  • out – Output tensor

  • in – Input tensor

  • stream – CUDA stream

Examples#

auto out = make_tensor<float>({sig_size});
// Perform a DCT from input "xv" into output "out"
dct(out, xv);