Abstract: A client-server system having server task scheduling in two phases with client deadlines phase information used in a second phase subtask server scheduling. Also, a object broker for the system with collapsing of client request calls and returns to maintain data in coprocessors, and server memory management for multitasking and data flow through a shared memory for multiple coprocessors to avoid primary processor bus congestion.

Abstract: This invention is a method of decoding a stream of video image data transmitted as independent image frames consisting of plural marcoblocks transmitted in a nonsequential order. The method defines a sub-frame corresponding to a proper subset of the full frame. The method determines if a currently received macroblock is within the sub-frame. The method decodes the sub-frame. The sub-frame may be decoded at less than or equal to the frame rate of the video image data. A table has one entry for each macroblock that stores a transmission order within the video frame for the corresponding macroblock. The method determine if a current macroblock is within the sub-frame by reading the table. Each macroblock consists of a plurality of contiguous blocks and includes luminance data for any included blocks and chrominance data for the macroblock as a whole. The method optionally decodes the luminance data for each included block and ignores the chrominance data.