Method and apparatus for object-oriented digital audio signal pr

Details Method and apparatus for object-oriented digital audio signal pr Method and apparatus for object-oriented digital audio signal pr

1994-05-10

1997-01-07

Black, Thomas G.

395 267, G10L 900

Patent

active

055925880

ABSTRACT:
An object-oriented audio signal processing system is disclosed. The signal processing system is capable of converting virtually any sound resource into a format which can be used by associated sound hardware to produce a sound. A signal processing system incorporating the invention comprises one or more chains formed by a plurality of sound objects serially connected. A sound object is a specialized task which performs a particular operation such as, for example, sample rate conversion of a sound resource, decompression of a sound resource, mixing multiple sound resources or retrieving sound resources from a software application. The sound objects are preferably modular and use substantially the same calling conventions and interface. A chain of sound objects processes digital audio signals into an output which can be maintained in a storage area, e.g. memory or disk or played on sound hardware. Chains which are formed to play sound on sound hardware preferably include a sound hardware object which is linked to the sound hardware. Preferably, objects other than sound hardware objects are sound hardware-independent, i.e. they do not have "knowledge" about specific sound hardware.

REFERENCES:
patent: 5283900 (1994-02-01), Frankel et al.
patent: 5384890 (1995-01-01), Anderson et al.
"The Sound Manager", Inside MacIntosh, vol. VI, Chapter 22, Jun. 1991, pp. 22-1 thru 22-114.
Jim Reekes, "Somewhere In Quicktime", Develop, Issue 16, Dec. 1993, pp. 34-38.
Jim Reekes & Tom Thompson, "MacIntosh Sound revealed", Byte, Jul. 1991, pp. 249-250, 252, 254, 256, 258, 260, 262.
"Sound Components", Inside MacIntosh: Sound, Chapter 5, May 1994, pp. 5-1 thru 5-57.
"Component Manager", Inside MacIntosh: More MacIntosh Toolbox, Oct. 1993, pp. 6-1 thru 6-99.

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