AES E-Library

AES E-Library

Performance Assessment of Reduced Bit-Rate Codecs

Document Thumbnail

Most audio coders developed in recent years make use of psychoacoustics to reduce the data rate required for transmitting or storing digital audio data. These coders are inherently nonlinear and do not pass all of the information applied to them on to their output. This makes evaluation with conventional test techniques difficult and makes the results a poor predictor of audible performance. The presentation will describe continuing work at developing methods for characterizing and comparing low bit-rate coders. A new test method which models the masking characteristics of the auditory system will be described and demonstrated. The technique is implemented on a digital signal processor which computes the masking effects of the test signals on the distortion products created by the coder. The results of measurements on several difference coders will be compared.

AES Conference:
Paper Number:
Publication Date:

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

AES - Audio Engineering Society