Device and method for generating and decoding a side channel signal transmitted with a main channel signal
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsGerald Schuller, Stefan Wabnik, Bernhard Grill, Alexander Zink
Life of this patent
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Abstract
For generating a signal to be transmitted original information is encoded into a main channel and a side channel, wherein the side channel is more robust against channel influences than the main channel. On the receiver side, when the receive quality is above a threshold, which is necessitated to execute a successful decoding of the main channel, the main channel is reproduced. If the receive quality falls below this threshold, however, the side channel is reproduced which may have less bits than the main channel and which is a correspondingly lower quality representation of the original information than the main channel.
Claims9
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 capable of being decoded separate from each other, wherein a minimal signal/noise ratio used to decode the side channel is smaller than a minimal signal/noise ratio used to decode 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;
- and
- a changeover switch which is controllable by the quality observer to provide the side channel as a decoded signal when the receive quality is lower than a threshold quality and to provide the main channel as a decoded signal when the receive quality is higher than or equal to the threshold quality.
A method for generating a decoded signal, comprising:
- receiving, by a receiver, a receive signal comprising a main channel and a side channel which are capable of being decoded separate from each other, wherein a minimal signal/noise ratio used to decode the side channel is smaller than a minimal signal/noise ratio used to decode the main channel;
- generating, by a decoder, a main channel separate from the side channel;
- assessing, by a quality observer, a receive quality;
- and
- providing, by a changeover switch, as a decoded signal, the side channel, when the receive quality is lower than a threshold quality, or providing, as a decoded signal, the main channel, when the receive quality is higher than or equal to the threshold quality,
- wherein at least one of the receiver, the decoder, the quality observer, and the changeover switch comprises a hardware implementation.
A non-transitory storage medium having stored thereon a computer program comprising a program code for executing, when the computer program runs on a computer, a method of generating a decoded signal, the method comprising:
- receiving a receive signal comprising a main channel and a side channel which are capable of being decoded separate from each other, wherein a minimal signal/noise ratio used to decode the side channel is smaller than a minimal signal/noise ratio used to decode the main channel;
- generating a main channel separate from the side channel;
- assessing a receive quality;
- and
- providing, as a decoded signal, the side channel, when the receive quality is lower than a threshold quality, or providing, as a decoded signal, the main channel, when the receive quality is higher than or equal to the threshold quality.
Dependencies are inferred from the claim text.