Patent ID: 6920188
Filing Date: 2005-07-19
Classification: G06T,H03G,H03M

Abstract:
1. An apparatus for manipulating an analog signal containing information contained in at least a first channel in the form of first-channel input components and contained in a second channel in the form of second-channel input components, said analog signals being subject to variations in amplitude, said apparatus comprising: a first dynamic range compressor operative according to a first compressive nonlinear transfer function and responsive to input to the first-channel for compressing the amplitude dynamic range of a first-channel-signal in the first channel to provide compressed first-channel components; a second dynamic range compressor operative according to a second compressive nonlinear transfer function and responsive to input to the second-channel for compressing the amplitude dynamic range of a second-channel-signal in the second channel to provide compressed second-channel components; and a signal processing element operative according to a transfer function F(i,q) for operating on said compressed first-channel components and said compressed second-channel components for providing, if expanded, first-channel output components and second-channel output components that have a constant vector norm.