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Low delay real to complex conversion in overlapping filter banks for partially complex processing
Low delay real to complex conversion in overlapping filter banks for partially complex processing
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机译:重叠滤波器组中的低延迟实数到复杂转换,以进行部分复杂处理
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摘要
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 L 1 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 L 1 blocks. Applications include audio signal processing in general and real to complex conversion in particular.
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