Method and apparatus for efficient implementation of single-sideband filter banks providing accurate measures of spectral magnitude and phase

A device for processing two or more input signals comprising input signal samples representing audio information, wherein said device comprises for each respective input signal

• buffer means for receiving a plurality of said input signal samples representing said respective input signal and forming a sequence of signal sample blocks,
• spectral means for generating first spectral representations by applying a first single-sideband filter bank to said sequence of signal sample blocks, and generating second spectral representations by applying a second single-sideband filter bank to said sequence of signal sample blocks, and
• phasor means for deriving measures of magnitude and/or phase of spectral components in said respective input signal in response to said first and second spectral representations,
• and further comprises
• processor means for processing first spectral representations for each respective input signal to generate an output signal suitable for transmission or storage, wherein said processing is adapted in response to said measures of magnitude and/or phase of spectral components corresponding to each of said input signals.

A method for processing an input signal comprising input signal samples representing audio information, said device comprising

• receiving a plurality of said input signal samples and forming a sequence of signal sample blocks,
• generating first spectral representations by applying a first single-sideband filter bank to said sequence of signal sample blocks, and generating second spectral representations by applying a second single-sideband filter bank to said sequence of signal sample blocks,
• deriving measures of magnitude and/or phase of spectral components in said audio information in response to said first and second spectral representations, and
• processing said first spectral representations to generate an output signal suitable for transmission or storage, wherein said processing is adapted in response to said measures of magnitude and/or phase of spectral components.