Methods and apparatuses for compressing digital image data are described herein. In one embodiment, a wavelet transform is performed on each pixel of a frame to generate multiple wavelet coefficients representing each pixel in a frequency domain. The wavelet coefficients of a sub-band of the frame are iteratively encoded into a bit stream based on a target transmission rate, where the sub-band of the frame is obtained from a parent sub-band of a previous iteration. The encoded wavelet coefficients satisfy a predetermined threshold based on a predetermined algorithm while the wavelet coefficients that do not satisfy the predetermined threshold are ignored in the respective iteration. Other methods and apparatuses are also described.
This application claims the benefit of U.S. Provisional Application No. 60/552,153, filed Mar. 10, 2004, U.S. Provisional Application No. 60/552,356, filed Mar. 10, 2004, and U.S. Provisional Application No. 60/552,270, filed Mar. 10, 2004. The above-identified applications are hereby incorporated by reference in their entirety.
