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Audio Processing System with real conversion to Complex with low delay Filter banks to partially overlap Processing Complex, which includes a Multiband filter to provide a partial representation of a complex Frequency Domain Signal
Audio Processing System with real conversion to Complex with low delay Filter banks to partially overlap Processing Complex, which includes a Multiband filter to provide a partial representation of a complex Frequency Domain Signal
An arrangement of overlapping filter banks comprises a synthesis stage and an analysis stage. The synthesis stage receives a first signal segmented into time blocks and outputs, based thereon, an intermediate signal to be received by the analysis stage forming the basis for the computation of a second signal segmented into time frames. In an embodiment, the synthesis stage is operable to release an approximate value of the intermediate signal in a time block located L1 time blocks ahead of its output block, which approximate value is computed on the basis of any available time blocks of the first signal, so that the approximate value contributes, in the analysis stage, to the second signal. The delay is typically reduced by L1 blocks. Applications include audio signal processing in general and real-to-complex conversion in particular.
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