Dynamic hierarchical resource scheduling for continuous media

Details Dynamic hierarchical resource scheduling for continuous media Dynamic hierarchical resource scheduling for continuous media

G - Physics

06

T

G06T 1/00 (2006.01) G06F 9/48 (2006.01) G06F 9/50 (2006.01) H04N 7/173 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2179842

An apparatus and method is provided that supports continuous media for conventional networked workstations and PC's. Described are user-level mechanisms and policies designed to give good, efficient multimedia service under the mild assumption that the operating system provides a preemptive real-time scheduling class that can be used to give CPU cycles to the multimedia processesin preference to other processes that are not time sensitive. There are no modifications to the operating system kernel and isochronous networks are not required. It suffices for an application to state that it wants to play a particular stream of a type known to the server (e.g. a file containing MPEG-1 video 32Ox240 pixels, 8-bit color, 30 frames per second), or for the application to specify a frame rate and an index describing the offset of each frame in a file.

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