UTM Lab Meeting: Multichannel Audio Coding for Wave Field Synthesis

The method consists of applying a two-dimensional filterbank to the
input multichannel signal, in both time and channel dimensions, and
coding the two-dimensional spectra using a spatio-temporal frequency
masking model. The coded spectral data is organized into a bitstream
together
with side information containing scale factors and Huffman codebook
information. We demonstrate how this coding method can be applied to
any smooth distribution of loudspeakers in space, while obtaining a
stable bitrate that can be made significantly lower compared to coding
each channel independently, depending on the amount of spatial masking
considered.