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Title:
METHOD OF DECODING TWO-CHANNEL MATRIX ENCODED AUDIO TO RECONSTRUCT MULTICHANNEL AUDIO
Document Type and Number:
WIPO Patent Application WO2002032186
Kind Code:
A3
Abstract:
The present invention provides a method of decoding two-channel matrix encoded audio (32) to reconstruct multichannel audio (34) that more closely approximates a discrete surround-sound presentation. This is accomplished by subband filtering (54) the two-channel matrix encoded audio, mapping (70) each of the subband signals into an expanded sound field (68) to produce multichannel subband signals, and synthesizing (78) those subband signals to reconstruct multichannel audio. By steering the subbands separately about an expanded sound field, various sounds can be simultaneously positioned about the sound field at different points allowing for more accurate placement and more distinct definition of each sound element.

Inventors:
SMITH WILLIAM P
SMYTH STEPHEN M
YAN MING
Application Number:
US0130997W
Publication Date:
August 14, 2003
Filing Date:
October 04, 2001
Export Citation:
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Assignee:
DIGITAL THEATER SYSTEMS, INC.
International Classes:
H04S5/02; H04S3/02; (IPC1-7): H04R3/02; H04S3/02
Foreign References:
EP0630168A11994-12-21
US5319713A1994-06-07
GB1514162A1978-06-14
GB2269969A1994-02-23
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