Bit-Plane Accessaries of Transform Domain Signal Processing
P.S. Moharir · IETE Journal of Research · 1973
In digital signal processing in the transform domain, it is important to study the effects of quantization in the transform domain on the signal reconstructed by inverse transformation. Adaptive quantization schemes are developed earlier for Fourier transform domain and Hadamard transform domain, using the knowledge that in the transform domain adaptive set-dependent bounds can be obtained on the sample amplitudes. This paper discusses various pre-processing and post-processing techniques that reduce the errors and favourably change the distribution of errors in the reconstructed signal or reduce the effective bit-rate without affecting the errors in the reconstructed signal.