Sub-band coders, decoders and filters

Details Sub-band coders, decoders and filters Sub-band coders, decoders and filters

H - Electricity

04

B

328/0.3, 328/0.5

H04B 1/66 (2006.01)

Patent

CA 1269135

ABSTRACT SUB-BAND CODING A pair of filters split an input signal into two frequency sub-bands (defined by a transition frequency) which are down-sampled and coded: after sample rate restoration the signals are filtered and combined. To reduce signal delays, the delay response of each filter is non-constant, having a maximum at or beyond the transition frequency. Preferably non-quadrature filter pairs are used. Filters may be cascaded for more than two sub-bands.

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