Perceptual audio coding of high quality audio signals is nowadays widely used. To reproduce the audio data, the bitstream is expanded into an uncompressed audio format by the decoding algorithm. As shown previously, it is feasible to recover the encoding compression parameters from the decoded audio signal and even translate a decoded audio signal back into its original bitstream representation. This technique is referred to as "inverse decoding" and has several interesting applications, including tandem-resistant re-encoding of audio signals. The paper illustrates practical results obtained by the first working implementation of an "Inverse Decoder" based on the popular MP3 coder. The performance of the algorithm is evaluated in terms of reconstruction precision and computational complexity. Finally, algorithmic issues are discussed.
Authors:
Moehrs, Sascha; Herre, Jurgen; Geiger, Ralf
Affiliations:
Fraunhofer IIS-A, Erlangen, Germany ; Fraunhofer AEMT, Ilmenau, Germany(See document for exact affiliation information.)
AES Convention:
112 (April 2002)
Paper Number:
5576
Publication Date:
April 1, 2002
Subject:
Low Bit-Rate 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.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
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.