Title :
A psychophysically justified bit allocation algorithm for subband image coding systems
Author :
Perkins, Michael G. ; Lookabaugh, Tom
Author_Institution :
Stanford Univ., CA, USA
Abstract :
The authors present a psychophysically justified bit allocation algorithm for use with subband image coding systems. This algorithm is also appropriate for DCT and DFT (discrete cosine and discrete Fourier transform)-based analysis-synthesis systems, as well as many others. The subjective performance of the algorithm was compared with the performance of a related algorithm that seeks to minimize the mean-square coding error. A two-dimensional analysis-synthesis system of J.P. Princen and A.B. Bradley (IEEE Trans. on Acoust. Speech, and Signal Proc., vol.ASSP-34, no.5, p.1153-1161, Oct. 1986) was used for the comparison. It is found that the psychophysically justified algorithm is superior to the minimum-mean-square-error algorithm at low bit rates
Keywords :
encoding; picture processing; DCT; DFT; analysis-synthesis systems; bit allocation algorithm; discrete Fourier transform; discrete cosine transform; psychophysically justified algorithm; subband image coding; subjective performance; Algorithm design and analysis; Bit rate; Discrete cosine transforms; Humans; Image analysis; Image coding; Laboratories; Psychology; Quantization; Radio spectrum management;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266804
