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.:

Authors: Fejzo, Zoran; Smyth, Stephen; McDowell, Keith; You, Yu-Li; Smith, Paul
Affiliation: Digital Theater Systems, Inc., Agoura Hills, CA
AES Convention: 109 (September 2000) Paper Number: 5259
Publication Date: September 1, 2000
Subject: Low Bit-Rate Coding

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.