A novel, non-uniform PCM audio quantizer is described, employing a time-domain computational auditory masking model. The model utilizes the concept of Signal Dependent Compression to produce an internal representation of the input signal so that via the use of a decision device a time-domain masking threshold can be derived. Based on this model, for inputs the reference audio and its quantized versions, the proposed quantizer derives masked / unmasked regions of the signal, so that by using an iterative process, the desired variable bit allocation can be achieved on the audio samples. Results indicate high quality quantization for an average rate of 6.5 bits / sample, the quantizer having low-computational complexity and very low latency.

Authors: Buchholz, Jörg; Mourjopoulos, John; Zarouchas, Thomas
Affiliations: Univeristy of Patras; University of Western Syndney(See document for exact affiliation information.)
AES Convention: 118 (May 2005) Paper Number: 6378
Publication Date: May 1, 2005
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.