Patent ID: 7917561
Filing Date: 2011-03-29
Classification: G10L,H03H

Abstract:
1. Apparatus for processing a plurality of real-valued subband signals, the plurality of real-valued subband signals comprising a first real-valued subband signal and a second real-valued subband signal, to obtain a complex-valued subband signal, comprising: a multiband filter for providing a real-valued intermediate subband signal based on filtering the first real-valued subband signal to obtain a first filtered subband signal and the second real-valued subband signal to obtain a second filtered subband signal and based on by combining the first filtered subband signal and the second filtered subband signal to obtain the real-valued intermediate subband signal; and a calculator for providing the complex-valued subband signal by combining the real-valued subband signal from the plurality of real-valued subband signals as a real part of the complex-valued subband signal and a signal based on the intermediate subband signal as an imaginary part of the complex-valued subband signal.