This paper presents a novel algorithm for transcoding the MPEG-4 AAC single-layer bit-streams for bit-rate adaptation purpose. The delivery of multimedia over heterogeneous networks and to the devices with various capabilities calls for the bit-rate adaptation. A previous approach that cascades a pair of full-grown decoder and encoder has very high computational complexity. Our approach can reduce the complexity drastically while the coding efficiency is close to that of the previous cascaded method. In order to achieve such simplification, three rate-distortion models/techniques are employed.

Authors: Chiang, Tihao; Hang, Hsueh-Ming; Lai, Te-Hsueh; Lee, Chunyi; Yang, Cheng-Han
Affiliation: Department of Electronics Engineering, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.
AES Convention: 117 (October 2004) Paper Number: 6219
Publication Date: October 1, 2004
Session Subject: Instrumentation and Measurement; Lossy and Lossless Audio 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.