Abstract: 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.

Abstract: 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.

Abstract: Methods and apparatuses for compressing digital image data with motion prediction are described herein. In one embodiment, for each two consecutive frames of an image sequence, a motion prediction is performed between the consecutive frames by tracking motion on a luminance map of the frames to generate motion prediction information for the luminance component. The motion prediction information of the luminance component is then applied to the chrominance maps. In response to the motion prediction, the wavelet coefficients of each frame and the motion prediction information are encoded into a bit stream based on a target transmission rate, where the encoded wavelet coefficients satisfy a predetermined threshold according to a predetermined algorithm. Other methods and apparatuses are also described.

Abstract: 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.

Abstract: Method and apparatus for enhancing diversity in spread spectrum type communication systems by creating pseudo-multipath conditions or links for certain communication signals. The invention provides alternative or additional signal paths, for signals being transferred between gateways and communication system users through one or more a satellite repeaters. These additional paths are used to establish and maintain adequate signal diversity as well as certain signal links by remote subscribers in heavy urban areas. In further aspects of the invention, diversity enhancers can employ high gain parabolic antennas and tracking mechanisms, or passive reflective surfaces. Signals can be relayed to subscriber units in canyon type blocked areas or within structures.