Method of decoding two-channel matrix encoded audio to...

Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion

Reexamination Certificate

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Details

C704S205000, C704S201000, C704S268000, C381S019000, C381S022000

Reexamination Certificate

active

07003467

ABSTRACT:
The present invention provides a method of decoding two-channel matrix encoded audio to reconstruct multichannel audio that more closely approximates a discrete surround-sound presentation. This is accomplished by subband filtering the two-channel matrix encoded audio, mapping each of the subband signals into an expanded sound field to produce multichannel subband signals, and synthesizing 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.

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Dressler, Roger. Dolby Surround Pro Logic II Decoder Principles of Operation, (2000), Dolby Laboratories p. 1-7.
Dressler, Roger. Dolby Pro Logic Surround Decoder Principles of Operation, Aug. 29, 2000, Dolby Laboratories, www.dolby.com/tech/whtppr.html.
Dressler, Roger,Dolby Surround Pro Logic II Decoder Principles of Operation, (2000), Dolby Laboratories Dolby Surround Pro Logic II, p. 1-7.
Dressler, Roger,Dolby Pro Logic Surround Decoder Principles of Operation, Aug. 29, 2000, Dolby Laboratories, www.dolby.com/tech/whtppr.html.

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