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Convention Paper Open Access

AC-4 – The Next Generation Audio Codec

Authors: Kjörling, Kristofer; Rödén, Jonas; Wolters, Martin; Riedmiller, Jeff; Biswas, Arijit; Ekstrand, Per; Gröschel, Alexander; Hedelin, Per; Hirvonen, Toni; Hörich, Holger; Klejsa, Janusz; Koppens, Jeroen; Krauss, K.; Lehtonen, Heidi-Maria; Linzmeier, Karsten; Muesch, Hannes; Mundt, Harald; Norcross, Scott; Popp, J.; Purnhagen, Heiko; Samuelsson, Jonas; Schug, Michael; Sehlström, L.; Thesing, R.; Villemoes, Lars; Vinton, Mark

AES Convention 140 · Paper 9491 · May 2016

Abstract

AC-4 is a state of the art audio codec standardized in ETSI (TS103 190 and TS103 190-2) and the TS103 190 is part of the DVB toolbox (TS101 154). AC-4 is an audio codec designed to address the current and future needs of video and audio entertainment services including broadcast and Internet streaming. As such, it incorporates a number of features beyond the traditional audio coding algorithms, such as capabilities to support immersive and personalized audio, support for advanced loudness management, video-frame synchronous coding, dialogue enhancement, etc. This paper will outline the thinking behind the design of the AC-4 codec, explain the different coding tools used, the systemic features included, and give an overview of performance and applications.

Details

Published in
AES Convention 140
AES Convention
140
Paper number
9491
Publication date
May 6, 2016
Session subject
Audio Signal Processing: Coding, Encoding, and Perception
Affiliation
Dolby Sweden AB, Stockholm, Sweden; Dolby Germany GmbH, Nuremberg, Germany; Dolby Laboratories, San Francisco, CA USA (See document for exact affiliation information.)
Type
Convention Paper