| 摘要 |
Apparatus for performing spectral analysis comprises a cascade connection of low-pass sampling filters 100-1 to 100-N operated at successively lower sampling rates. Thus an input signal Go, which may be a video or an audio signal, is transformed into Loplacian component signals Lo to LN-1, and a remnant Gaussian output GN. The apparatus may be embodied in digital form wherein each of the filters comprises a digital convolution filter. In the alternative, analogue embodiments may employ charge coupled devices as convolution or interpolation filters. Apparatus is also disclosed for synthesising a signal by recombining the spectrum analysis components. <IMAGE> |
