Clean Audio for TV broadcast: An Object-Based Approach for Hearing-Impaired Viewers - April 2015
Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
Sound Board: Food for Thought, Aesthetics in Orchestra Recording - April 2015
Least Squares Theory and Design of Optimal Noise Shaping Filters
Signal requantization to reduce the word-length of an audio stream introduces distortions. Noise shaping can be applied to make requantization distortions minimally audible. The psychoacoustically optimal noise shaping curve depends on the time-varying characteristics of the input signal. Therefore, the noise shaping filter coefficients are to be computed and updated on a regular basis. We present a new theory for optimal noise shaping of audio. It provides more straightforward proof of properties of dithered and non-dithered noise shaping. In contrast with standard theory, it does show how optimum noise shaping filters can be designed in practice. Experimental results illustrate the method. The link with two popular noise shaping requantization techniques (F-weighted noise shaping and Super Bit Mapping) is also discussed.
Click to purchase paper 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 $20 for non-members, $5 for AES members and is free for E-Library subscribers.