2-D Fourier transformation in mixed formats

Differential coding allows for the representation of the signals in a digital form with small word length and at the same time it ensures a specified resolution, compression and protection from interference. The use of differences and delta modulation (DM) for the economical representation and efficient processing of images needs the development of existing methods and the working out of simple and fast processing methods in real time. Therefore DFT methods were proposed in mixed formats which are better both in DFT with PCM and DFT with differences or DM. The use of DFT algorithms in such formats is expedient in neural systems