Multi-mode channel coding

Method for channel decoding at least one transmitted code word, comprising:

• applying at least one coloration sequence to the at least one transmitted code word to acquire at least one colored code word, wherein the coloration sequence is such that at least one bit of the code word is changed by the application of the at least one coloration sequence, wherein the at least one coloration sequence is associated to a certain decoding mode,
• redundancy decoding the at least one colored code word to acquire a decoded output code word,
• generating a decoding mode indicator indicating a certain decoding mode to be used by the redundancy decoder to acquire the decoded output code word, wherein the decoding mode indicator is associated to the at least one coloration sequence used for the coloration of the colored code word,
• storing a candidate list indicating a predetermined number of candidate decoding modes, wherein one candidate decoding mode is indicated without any coloration sequence and the other respective candidate decoding modes are indicated in association with a coloration sequence, and to select one candidate decoding mode as a certain decoding mode to be used by the redundancy decoder to acquire the decoded output code word to be used,
• wherein determining process comprises a first decoding mode operation and a second decoding mode operation, wherein
• a first decoding mode operation comprises:
• estimating the certain decoding mode being the candidate decoding mode without coloration sequence, calculating syndromes of the code word, checking whether the calculated syndromes comprise value zero, and when the calculated syndromes comprise value zero, calculating a hash value of the transmitted code word, comparing the calculated hash value and a hash value comprised by the transmitted code word,
• wherein the determining process comprises:
• receiving a result of the comparison between the calculated hash value and the comprised hash value,
• when the calculated hash value is equal to the comprised hash value, generating the decoding mode indicator to indicate the candidate coding mode without coloration sequence as the certain decoding mode, or
• when the calculated hash value is different from the comprised hash value, excluding the candidate decoding mode without coloration sequence from the candidate list, and to proceed further with the second decoding mode operation.

Non-transitory digital storage medium having a computer program stored thereon to perform the method for channel decoding at least one transmitted code word, said method comprising:

• applying at least one coloration sequence to the at least one transmitted code word to acquire at least one colored code word, wherein the coloration sequence is such that at least one bit of the code word is changed by the application of the at least one coloration sequence, wherein the at least one coloration sequence is associated to a certain decoding mode,
• redundancy decoding the at least one colored code word to acquire a decoded output code word,
• generating a decoding mode indicator indicating a certain decoding mode to be used by the redundancy decoder to acquire the decoded output code word, wherein the decoding mode indicator is associated to the at least one coloration sequence used for the coloration of the colored code word,
• storing a candidate list indicating a predetermined number of candidate decoding modes, wherein one candidate decoding mode is indicated without any coloration sequence and the other respective candidate decoding modes are indicated in association with a coloration sequence, and to select one candidate decoding mode as a certain decoding mode to be used by the redundancy decoder to acquire the decoded output code word to be used,
• wherein determining process comprises a first decoding mode operation and a second decoding mode operation, wherein
• a first decoding mode operation comprises:
• estimating the certain decoding mode being the candidate decoding mode without coloration sequence, calculating syndromes of the code word, checking whether the calculated syndromes comprise value zero, and when the calculated syndromes comprise value zero, calculating a hash value of the transmitted code word, comparing the calculated hash value and a hash value comprised by the transmitted code word,
• wherein the determining process comprises:
• receiving a result of the comparison between the calculated hash value and the comprised hash value,
• when the calculated hash value is equal to the comprised hash value, generating the decoding mode indicator to indicate the candidate coding mode without coloration sequence as the certain decoding mode, or
• when the calculated hash value is different from the comprised hash value, excluding the candidate decoding mode without coloration sequence from the candidate list, and to proceed further with the second decoding mode operation,
• when said computer program is run by a computer.

Data stream generated by a method for channel decoding at least one transmitted code word, said method comprising:

• applying at least one coloration sequence to the at least one transmitted code word to acquire at least one colored code word, wherein the coloration sequence is such that at least one bit of the code word is changed by the application of the at least one coloration sequence, wherein the at least one coloration sequence is associated to a certain decoding mode,
• redundancy decoding the at least one colored code word to acquire a decoded output code word,
• generating a decoding mode indicator indicating a certain decoding mode to be used by the redundancy decoder to acquire the decoded output code word, wherein the decoding mode indicator is associated to the at least one coloration sequence used for the coloration of the colored code word,
• storing a candidate list indicating a predetermined number of candidate decoding modes, wherein one candidate decoding mode is indicated without any coloration sequence and the other respective candidate decoding modes are indicated in association with a coloration sequence, and to select one candidate decoding mode as a certain decoding mode to be used by the redundancy decoder to acquire the decoded output code word to be used,
• wherein determining process comprises a first decoding mode operation and a second decoding mode operation, wherein
• a first decoding mode operation comprises:
• estimating the certain decoding mode being the candidate decoding mode without coloration sequence, calculating syndromes of the code word, checking whether the calculated syndromes comprise value zero, and when the calculated syndromes comprise value zero, calculating a hash value of the transmitted code word, comparing the calculated hash value and a hash value comprised by the transmitted code word,
• wherein the determining process comprises:
• receiving a result of the comparison between the calculated hash value and the comprised hash value,
• when the calculated hash value is equal to the comprised hash value, generating the decoding mode indicator to indicate the candidate coding mode without coloration sequence as the certain decoding mode, or
• when the calculated hash value is different from the comprised hash value, excluding the candidate decoding mode without coloration sequence from the candidate list, and to proceed further with the second decoding mode operation.