Perceptual Coding of Matrixed Audio Signals
Matrixing has been used for a long time in M-S stereo to provide backwards compatibility with monophonic reproduction. The MPEG phase 2 multichannel coding system uses matrixing to provide backwards compatibility to existing two-channel stereo MPEG phase 1 decoders. It is also used for transmission of more than two audio signals in two channels, e.g. Dolby Surround. The combination of matrixed audio signals and low bitrate coding based on perceptual principles may lead to artefacts due to an unmasking effect of the quantisation noise if no countermeasures are taken. The paper discussses means to code matrixed signals with low bitrates and without artefacts.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is temporarily free for AES members.