Sub-band Codec (SBC) was adopted as a mandatory codec by the Bluetooth Special Interest Group (SIG) in the year 2002. It operates on blocks of 4, 8, 12, or 16 16-bit PCM audio signals sampled at 16, 32, 44.1, or 48 KHz and generates a compressed bit-stream having bit-rates in the range of 56  512 kbps. The codec uses a cosine modulated filter bank for analysis and synthesis. The filter-bank can be configured for 4 or 8 bands. The sub-band signals are quantized using a dynamic bit-allocation scheme and block adaptive PCM quantization. The codec supports two bit allocation algorithms, loudness and SNR, and four channel modes: mono, stereo, joint stereo, and dual channel. The codec is primarily used in Bluetooth technology based short-range wireless applications.