Perceptual Noise Substitution: Difference between revisions
No edit summary |
(replaced ref with link to archived copy) |
||
| (5 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
Part of the MPEG-4 Standard ISO/IEC 14496-3 Audio (MPEG-4 General Audio) and not available within MPEG-2 AAC i.e. PNS is one of the new tools introduced in MPEG-4 AAC. | |||
Based on the fact that the exact spectral components of noise in audio signals is not ''perceptible'', hence the original noise can be ''substituted'' by randomly generated noise over an appropriate spectral region at an equivalent power level during decoding, i.o.w. "noise always sounds the same¨. | |||
==References== | |||
* MPEG-4 Advanced Audio Coding by Peter Doliwa, http://web.archive.org/web/20060206183237/http://www.ibr.cs.tu-bs.de/courses/ss04/skm/mpeg-4-aac.pdf | |||
{{stub}} | {{stub}} | ||
[[Category: | [[Category:Algorithms]] | ||
Latest revision as of 05:10, 5 June 2009
Part of the MPEG-4 Standard ISO/IEC 14496-3 Audio (MPEG-4 General Audio) and not available within MPEG-2 AAC i.e. PNS is one of the new tools introduced in MPEG-4 AAC.
Based on the fact that the exact spectral components of noise in audio signals is not perceptible, hence the original noise can be substituted by randomly generated noise over an appropriate spectral region at an equivalent power level during decoding, i.o.w. "noise always sounds the same¨.
References
- MPEG-4 Advanced Audio Coding by Peter Doliwa, http://web.archive.org/web/20060206183237/http://www.ibr.cs.tu-bs.de/courses/ss04/skm/mpeg-4-aac.pdf
This article is a stub. You can help the Hydrogenaudio Knowledgebase by expanding it.