Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Extending the MPEG-4 AAC codec by perceptual noise substitution

: Herre, J.; Schulz, D.
: Audio Engineering Society -AES-

New York, NY: AES, 1998
Preprint - Audio Engineering Society, 4720
Audio Engineering Society (Convention) <104, 1998, Amsterdam>
Conference Proceedings
Fraunhofer IIS A ( IIS) ()
AAC; advanced audio coding; data compression; data reduction; Datenkomprimierung; Datenreduktion; low bitrate audio coding; MPEG; MPEG-2; MPEG-4; perceptual audio coding; perceptual noise substitution; PNS; psychoacoustic; Psychoakustik; Toncodierung

Recently introduced, the ISO/MPEG-2 Advanced Audio Coding (AAC) coding technology provides a powerful framework which covers almost any application from simple monophonic compression to full-featured multi-channel coding. Since the AAC codec constitutes the core of the high-qualtiy part of the MPEG-4 audio coder, further enhancements in terms of compression efficiency are desirable for use at very low bitrates. This paper describes the extension of the AAC-based MPEG-4 audio coder by means of the so-called Perceptual Noise Substitution (PNS) technique as it was accepted by MPEG-4.