In This Section
Reflecting on Reflections - June 2014
Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
Quiet Thoughts on a Deafening Problem - May 2014
AES Conference Papers Forum
Enhanced Stereo Algorithms in the Unified Speech and Audio Coding
The unified speech and audio coding (USAC) is under the ISO/MPEG standardization, and is supposed to complete the standardization process in 2011. In the perspective of technical merits that the USAC brings in audio and speech compression, this paper highlights stereo algorithms that perform best depending on bitrates and audio content types in various use case scenarios. At very low rates in the ranging from 16 to 48 kbits/sec, MPEG Surround tool with phase parameters can be used to deliver high stereo quality in a bit-efficient way. In the mid range of 48-96 kbits/sec, the unified stereo scheme can be utilized based on residual signals with little burden of complexity. Finally, at higher bitrates, a complex stereo prediction in MDCT domain can be used through the real-to-imaginary Transform in addition to the conventional Mid/Side stereo. Over broad range of bit rates, the newly developed methods in the USAC result in excellent stereo quality encompassing a variety of audio contents in a bit-efficient way with little cost of complexity.
No AES members have commented on this paper yet.
Subscribe to this discussion
Start a discussion!
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.