ssion, standard, algorithm> (MPEG-4 AAC ssR) An AAC flavour supporting different qualities for different targets. One stream can contain up to 3 streams for 11.025 kHz (stream 1), 22.05 (stream 1 and 2) and 44.1 kHz (all 3 streams) sampling frequency. Quality is between Low Profile and Main profile. see also JPEG-2000. (2001-12-09)