Lossless band division and band combining using global pass filters

摘要

Methods and apparatus for lossless band division and band combining of streams of signal samples using global pass filtering are described. The band division operation reformatting the original stream into two intermediate streams representing the even and odd samples of the original stream and then providing two output substreams representing the high frequency and low frequency components of the original stream, Filter them. Conversely, the band combining actuation matrix filters the two subband streams to provide two quantized intermediate sub-streams, and then interleaves the filtered streams to provide an output stream so that the intermediate sub-streams are even and non-Let it be an odd number of samples.