Parametric stereo coding is a technique to efficiently code a stereo audio signal as a monaural signal plus a small amount of stereo parameters. The monaural signal can be encoded using any audio coder. The stereo parameters can be embedded in the ancillary part of the mono bit stream creating backwards mono compatibility. In the decoder, first the monaural signal is decoded after which the stereo signal is reconstructed from the stereo parameters. In this paper, a low complexity decoder solution is described based on complex-modulated filter banks. Combinations of the parametric stereo decoder with both a parametric coding scheme and with aacPlus will be elucidated.

Authors: Schuijers, Erik; Breebaart, Jeroen; Purnhagen, Heiko; Engdegard, Jonas
Affiliations: Philips Digital Systems Laboratories, Eindhoven, The Netherlands ; Philips Research Laboratories, Eindhoven, The Netherlands ; Coding Technologies, Stockholm, Sweden(See document for exact affiliation information.)
AES Convention: 116 (May 2004) Paper Number: 6073
Publication Date: May 1, 2004
Subject: Spatial Audio Coding

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