Title :
ADPCM encoding of images using a conjugate gradient based adaptive algorithm
Author :
Joo, Kyung Sub ; Gschwind, Douglas Ray ; Bose, Tamal
Author_Institution :
Dept. of Electr. Eng., Colorado Univ., Denver, CO, USA
Abstract :
A new recursive conjugate gradient (RCG) algorithm is developed for two-dimensional (2-D) adaptive differential pulse code modulation (ADPCM). This algorithm is based on the conjugate gradient method of optimization and therefore has a fast convergence characteristic. The RCG operates on samples of data rather than blocks, and is computationally simpler than the recursive least square (RLS) algorithm. Simulation results illustrate the efficiency of the method in ADPCM encoding of images
Keywords :
adaptive signal processing; conjugate gradient methods; convergence of numerical methods; differential pulse code modulation; image coding; image sampling; modulation coding; optimisation; 2D adaptive differential pulse code modulation; ADPCM encoding; conjugate gradient based adaptive algorithm; conjugate gradient method; data samples; fast convergence characteristic; image coding; optimization; recursive conjugate gradient algorithm; simulation results; Computational modeling; Convergence; Gradient methods; Image coding; Least squares methods; Modulation coding; Optimization methods; Pulse modulation; Resonance light scattering; Two dimensional displays;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.544832
