Synchronized clocks and media players

Details Synchronized clocks and media players Synchronized clocks and media players

1993-03-31

1995-09-19

Kriess, Kevin A.

Boots, shoes, and leggings

3642515, 364DIG1, 395700, G06F 100, G06F 944

Patent

active

054524350

ABSTRACT:
A media player and the clock which controls it are integrated into a single object. This integration may be achieved by the construct of inheritance between objects in an object oriented programming environment. A software class for player objects is established which inherits from a software class for clock objects. In this way, a player "is a" clock. This integration provides improved synchronization among different media, and simplifies design of applications which employ player objects and clock objects. Each object is synchronized to a RootClock object which operates at the speed of the fastest media player in the system. The RootClock may be separated into "low" order and "high" order components and a compare register in order to reduce interrupt overhead.

REFERENCES:
patent: 5261041 (1993-11-01), Susman
QuickTime Developer's Guide, Preliminary, Apple Computer, Inc., 1991 (published in the U.S.A.), pp. ii, 1-3 to 1-12, 2-3 to 2-10, 2-147 to 2-162, 2-227 to 2-248, and 5-5 to 5-20.
Poole, Lon, QuickTime in Motion, MacWorld, Sep. 1991, pp. 154-159.
Davis, Andrew W. and Joe Burke, The Mac Goes to the Movies, Byte, Feb. 1993, pp. 225-230.
Computer Communications, vol. 15, No. 10, Dec. 1992, Guildford GB, pp. 611-618, G. Blakowski et al. "Tool support for the synchronization and presention of distributed multimedia."
Computer Journal, vol. 36, No. 1, Oct. 1992, Lond GB, pp. 4-18, F. Horn et al. "On programming and supporting multimedia object synchronizaation."
BYTE Vo. 18, No. 2, Feb. 1993, London BG, pp. 225-230, A. W. David et al., "The Mac goes to the movies."

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