Method for channel decoding a data stream containing useful data and redundant data, device for channel decoding, computer-readable storage medium and computer program element
AssigneeSiemens Aktiengesellschaft
InventorsFrank Burkert, Ralf Buschmann, Gero Base
Life of this patent
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Abstract
The data stream contains useful data and redundant data and at least one source-coded error-containing bit sequence that characterizes a given position within the data stream. The source-coded, error-free bit sequence is known by the channel decoder. The data stream is channel-decoded and the source-coded, error-containing bit sequence is determined from the channel-coded data stream. The data stream is once again channel-decoded, wherein the data stream is once again channel decoded taking into account the detected source coded, error-containing bit sequence.
Claims18
A method for channel decoding a data stream containing useful data and redundant data, the data stream exhibiting at least one source-coded errored bit sequence, the corresponding source-coded error-free bit sequence being a known bit sequence,
- in which the data stream is channel-decoded,
- in which the source-coded errored bit sequence is determined from the channel-decoded data stream, and an error information item about the source-coded error bit sequence is determined,
- in which the data stream is again channel-decoded, the repeated channel decoding of the data-stream being effected by taking into consideration the error information item.
A device for channel decoding a data stream containing useful data and redundant data, the data stream exhibiting at least one source-coded errored bit sequence, the corresponding source-coded error-free bit sequence being a known bit sequence, comprising
- a channel decoder for the repeated channel decoding of the data stream,
- a determining unit for determining a source-coded errored bit sequence from the channel-decoded data stream, in which an error information item about the source-coded errored bit sequence can be determined during the determination of the source-coded errored bit sequence,
- the determining unit being connected to the channel decoder in such a manner that the error information item about the source-coded errored bit sequence can be supplied to the channel decoder and the latter takes into consideration the error information item during the repeated channel decoding of the data stream.
A computer-readable storage medium in which a computer program for channel decoding a data stream containing useful data and redundant data is stored, the data stream exhibiting at least one source-coded errored bit sequence, the corresponding source-coded error-free bit sequence being a known bit sequence, which program, when it is executed by a processor, exhibits the following method steps:
- the data stream is channel decoded,
- the source-coded errored bit sequence is determined from the channel-decoded data stream, and an error information item about the source-coded errored bit sequence is determined,
- the data stream is again channel decoded, the repeated channel decoding of the data stream being effected by taking into consideration the error information item.
A computer program element for channel decoding a data stream containing useful data and redundant data, the data stream exhibiting at least one source-coded errored bit sequence, the corresponding source-coded error-free bit sequence being a known bit sequence which, when it is executed by a processor, exhibits the following method steps:
- the data stream is channel decoded,
- the source-coded errored bit sequence is determined from the channel-decoded data stream, and an error information item about the source-coded errored bit sequence is determined,
- the data stream is again channel decoded, the repeated channel decoding of the data stream being effected by taking into consideration the error information item.
Dependencies are inferred from the claim text.