Perceptual audio coding has become a widely-used technique for economic transmission and storage of high-quality audio signals. Audio compression schemes, as known from MPEG-1, 2 and 4 allow encoding with either a constant or a variable bitrate over time. While many applications demand a constant bitrate due to channel characteristics, the use of variable bitrate encoding becomes increasingly attractive e.g.~for Internet Audio and portable audio players. Using such an approach can lead to significant improvements in audio quality compared to traditional constant bitrate encoding, but the consumed average bitrate will generally depend on the compressed audio material. This paper presents investigations into "two-pass encoding" which combines the flexibility of variable bitrate encoding and a predictable target bit consumption.

Authors: Weishart, Martin; Herre, Rirgen; Goebel, Ralph
Affiliations: Fraunhofer Institute for Integrated Circuits, Erlangen, Germany ; Fachhochschule Koblenz, Koblenz, Germany(See document for exact affiliation information.)
AES Convention: 113 (October 2002) Paper Number: 5687
Publication Date: October 1, 2002
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.