Device and method for generating a signal to be transmitted or a signal to be decoded
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.
Claims32
1-30. (canceled)
A device for generating a signal to be transmitted, comprising:
- an encoder for generating an encoded signal from an information signal, wherein the encoder is implemented
- to generate a main channel and a side channel which may be decoded separate from each other and represent the information signal, and
- to generate the main channel and the side channel so that the side channel is more robust against transmission-channel influences than the main channel.
A device for generating a decoded signal, comprising:
- a receiver for receiving a receive signal comprising a main channel and a side channel which may be decoded separate 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 for generating a main channel which is separate from the side channel;
- a quality observer for assessing 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 signal to be transmitted, comprising:
- generating an encoded signal from an information signal, wherein the encoder is implemented,
- by generating a main channel and a side channel which may be decoded separate from each other and represent the information signal, and
- wherein the main channel and the side channel are generated such that the side channel is more robust against transmission-channel influences than the main channel.
A method for generating a decoded signal, comprising:
- receiving a receive signal comprising a main channel and a side channel which may be decoded separate 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;
- 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.
A computer readable medium having a computer program comprising a program code for executing, when the computer program runs on a computer, a method of generating a signal to be transmitted, the method comprising:
- generating an encoded signal from an information signal, wherein the encoder is implemented,
- by generating a main channel and a side channel which may be decoded separate from each other and represent the information signal, and
- wherein the main channel and the side channel are generated such that the side channel is more robust against transmission-channel influences than the main channel.
A computer readable medium having 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 may be decoded separate 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;
- 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.
An encoded signal comprising a main channel and a side channel, wherein the side channel is formed such that it is more robust against transmission-channel influences than the main channel.
Dependencies are inferred from the claim text.