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Convention Paper

Backward Compatible Enhancement of DTS Multi-Channel Audio Coding That Delivers 96-kHz/24-Bit Audio Quality

Authors: Fejzo, Zoran; Smyth, Stephen; McDowell, Keith; You, Yu-Li; Smith, Paul

AES Convention 109 · Paper 5259 · September 2000

Abstract

The DTS core-plus extension multichannel audio coding methodology permits established audio coding systems to operate at higher bit rates and/or higher sampling frequencies while remaining compatible with first-generation decoders (legacy decoders). While popular algorithms such as DTS Coherent Acoustics, Dolby AC-3 and MPEG II can all benefit from our process, the paper describes in detail its specific application to the DTS subband ADPCM coding algorithm. A compatible bitstream is made up of -core- data, representing 48-kHz encoded audio signals; and -extension- data, representing differential audio data and/or higher frequency components. Existing core-only decoders make use of the core data to reproduce 48-kHz sampled audio. New 96-kHz decoders make use of both core and extension data to reproduce 96-kHz audio. The paper also describes the efficient real-time implementations of the 5.1-channel, core+extension decoder on a single SHARC 21065L 32-bit floating-point processor and the encoder on a Pentium III processor.:

Details

Published in
AES Convention 109
AES Convention
109
Paper number
5259
Publication date
September 6, 2000
Session subject
Low Bit-Rate Coding
Affiliation
Digital Theater Systems, Inc., Agoura Hills, CA (See document for exact affiliation information.)
Type
Convention Paper