Backward adaptive warped lattice for wideband stereo coding

In this paper an extremely low delay perceptual audio codec is presented. The codec is based on warped linear prediction which inherently utilizes auditory frequency resolution and frequency masking characteristics of hearing. In the current version of the codec the coding delay is the minimum. This is achieved using backward adaptive lattice methods where waveform modeling is completely based on already transmitted data. Coding technique is applied separately to the two channels but the quantization processes are unified to gain more bit rate reduction.