Image signal coding method and device thereof, image signal deco

Details Image signal coding method and device thereof, image signal deco Image signal coding method and device thereof, image signal deco

1997-03-19

1999-11-09

Lee, Richard

Television

Bandwidth reduction system

Data rate reduction

348405, H04N 730

Patent

active

059824344

ABSTRACT:
In an image coding device and method for coding an image signal employing sub-band transforms, an inputted image signal is hierarchically divided into a plurality of frequency bands using sub-band transforms and a plurality of frequency band signals are generated, with each frequency band signal comprising sub-band transform coefficients. The sub-band transform coefficients of each frequency band signal are then coded using zero tree coding and run length coding in a more efficient manner than with related devices and methods.

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