Subband coding of high-fidelity quality audio signals at 128 kbps

The design and performance of a 24-band subband coder for the encoding of high-fidelity quality 20 kHz audio signals at 128 kb/s are considered. The slightly different performances of the subband coder using two different adaptive bit allocation algorithms, namely the modified Ramstad algorithm and the algorithm based on noise masking threshold, are discussed and compared in terms of segmental signal-to-noise ratio, mask-to-noise ratio, and the probability of noise measures.< >