Recursive formulation of short-time discrete trigonometric transforms
José Antonio Rosendo Macías, Antonio Gómez‐Expósito · IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing · 1998
Recursive formulations of the moving-window discrete Fourier transform (DFT) are well known. However, recursive versions of other useful discrete transforms, like the moving-window discrete cosine transform (DCT), discrete sine transform (DST), or discrete Hartley transform (DHT), have not been developed so far. In this paper, second-order recursive expressions for the DCT, DST, and DHT, intended for real-valued windowed sequences, are presented.