MPEG Unified Speech and Audio Coding – Bridging the Gap

Multrus, Markus; Neuendorf, Max; Lecomte, Jérémie; Fuchs, Guillaume; Bayer, Stefan; Robilliard, Julien; Nagel, Frederik; Wilde, Stephan; Fischer, Daniel A.; Hilpert, Johannes; Rettelbach, Nikolaus; Helmrich, Christian R.; Disch, Sascha; Geiger, Ralf; Grill, Bernhard

doi:10.1007/978-3-642-23071-4_33

Cited by 2 publications

(1 citation statement)

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“…In 2012, Schafer further developed Krueger's method, the multichannel case, which has low algorithmic delay [26]. Recently, M/S coding was combined with parametric stereo coding at low bitrates in the MPEG-USAC standard [27] by predicting the residual channel using spatial cue-based parameters, which aimed to bridge the stereo quality gap between low bitrates and high bitrates [28]. M/S coding also works alone at high bitrates utilizing a novel complex prediction to achieve better performance [29].…”

Section: Introductionmentioning

confidence: 99%

Expanded three-channel mid/side coding for three-dimensional multichannel audio systems

Dong

Wang

et al. 2014

J AUDIO SPEECH MUSIC PROC.

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Three-dimensional (3D) audio technologies are booming with the success of 3D video technology. The surge in audio channels makes its huge data unacceptable for transmitting bandwidth and storage media, and the signal compression algorithm for 3D audio systems becomes an important task. This paper investigates the conventional mid/side (M/S) coding method and discusses the signal correlation property of three-dimensional multichannel systems. Then based on the channel triple, a three-channel dependent M/S coding (3D-M/S) method is proposed to reduce interchannel redundancy and corresponding transform matrices are presented. Furthermore, a framework is proposed to enable 3D-M/S compress any number of audio channels. Finally, the masking threshold of the perceptual audio core codec is modified, which guarantees the final coding noise to meet the perceptual threshold constraint of the original channel signals. Objective and subjective tests with panning signals indicate an increase in coding efficiency compared to Independent channel coding and a moderate complexity increase compared to a PCA method.

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Section: Introductionmentioning

confidence: 99%