bit sliced arithmetic coding (MPEG-4) (BSAC)
Bit Sliced Arithmetic Coding (BSAC) is a scalable audio coding developed by Samsung that is part of MPEG-4.
Unlike AAC compression, with which BSAC is essentially identical, BSAC uses noise-free coding. A bitstream generated with Advanced Audio Coding (AAC), can be converted to a noise-free BSAC bitstream with transcoding.
The process can generate bitstreams at precise bitrates between 16 kbit/s and 64 kbit/s per channel, but has its best characteristics between 40 kbit/s and 64 kbit/s. Scalability refers to the data rate, which can be refined in 1-kbit/s increments. At low bit rates, the efficiency of BSAC is relatively low.
BSAC is used in audio streaming, DigitalMultimedia Broadcast( DMB), Audio on Demand( AoD) and Internet streaming.