The coder/decoder (codec) system of the present invention includes a coder and a decoder. The coder includes a multi-resolution transform processor, such as a modulated lapped transform (MLT) transform processor, a weighting processor, a uniform quantizer, a masking threshold spectrum processor, an entropy...http://www.google.fr/patents/US6029126?utm_source=gb-gplus-shareBrevet US6029126 - Scalable audio coder and decoder
