Patent ID: 8223881

Claim:
A transmitter for a wireless audio transmission system comprising: at least one analog/digital converter unit for analog/digital conversion of analog audio signals to be transmitted into a first digitized signal; and at least one digital signal processing unit with a compressing/encoding means for compressing and encoding the first digitized signal into a second digitized signal to be transmitted, the compressing/encoding means comprising: a filter bank for dividing the first digitized signal into different frequency bands; at least one multiplier unit for multiplying the different frequency bands of the first digitized signal by weighting factors; a sum filter bank for combining the output signals of the multiplication units to afford a filter bank total signal; an addition unit for adding the first digitized signal to the filter bank total signal to obtain the second digitized signal; a filter bank analysis unit for analyzing the second digitized signal; and an envelope detection unit for estimating the envelope of the second digitized signal based on the analysis of the second digitized signal by the filter bank analysis unit to determine the weighting factors.