Patent ID: 8724714
Filing Date: 2014-05-13
Classification: G08C,G10L,H04L,H04N

Abstract:
1. A device for generating a decoded signal, comprising: a receiver configured to receive a receive signal comprising a main channel and a side channel which are separately decoded from each other, wherein a minimal signal/noise ratio for decoding the side channel is smaller than a minimal signal/noise ratio for decoding the main channel; a decoder configured to generate a main channel which is separate from the side channel; a quality observer configured to assess a receive quality of the main channel; and a changeover switch which is controllable by the quality observer to provide the side channel as a decoded signal when the receive quality of the main channel is lower than a threshold quality and to provide the main channel as a decoded signal when the receive quality of the main channel is higher than or equal to the threshold quality; wherein the side channel comprises scale factors representing energies per different subbands of an information signal; and the decoder comprises a source decoder which is implemented, for generating the side channel, to synthesize spectral values in subbands for which scale factors were transmitted in the side channel and to weight the synthesized spectral values using the transmitted scale factors.