Title :
Efficient subband encoding of magnitude/phase spectra
Author :
Soman, A.K. ; Vaidyanathan, P.P.
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
Abstract :
For certain types of signals, perfect reconstruction is not essential. It is sufficient to have knowledge of either the magnitude or the phase spectrum only. Filter banks which introduce phase distortion are used for encoding speech signals. These schemes have an inherent redundancy; i.e., the samples are still transmitted at the sampling rate. It is shown how magnitude or phase information can be encoded at only half the sampling rate in a filter bank formalism
Keywords :
discrete Fourier transforms; image coding; speech coding; DFT; filter bank formalism; image signals; magnitude spectrum; phase distortion; phase spectrum; redundancy; sampling rate; speech signals; subband encoding; Cepstrum; Encoding; Filter bank; Image coding; Image reconstruction; Image sampling; Phase distortion; Redundancy; Speech coding; Transfer functions;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.393739
