Patent ID: 6664913
Filing Date: 2003-12-16
Classification: H03M

Abstract:
An invertible transformation signal processor for converting input integer-valued PCM n-channel waveform data to output integer-valued PCM n-channel waveform data, wherein the processor comprises:an n-channel input for said input integer-valued PCM n-channel waveform data; an n-channel output for said output integer-valued PCM n-channel waveform data; an n-channel summing node; an n-channel differencing node; an n-channel quantiser rounding operation rounding to near or nearest integer values; a first nÃ—n matrix filter means, each term of which incorporates delay; a second nÃ—n matrix filter means, each term of which incorporates delay; and, a first and a second nÃ—n matrix quantiser, wherein the n-channel input is coupled to the summing node via said first nÃ—n matrix quantiser, the n-channel input is coupled to the differencing node via the first nÃ—n matrix filter, the n-channel output is coupled to the differencing node via the second nÃ—n matrix filter, the n-channel differencing node is coupled to the n-channel quantiser, the n-channel quantiser is coupled to the n-channel summing node, and the n-channel summing node is coupled to the n-channel output via the second nÃ—n matrix quantiser.