Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes (error detection or error correction for analogue/digital, digital/analogue or code conversion H03M1/00 – H03M11/00; specially adapted for digital computers G06F11/08; for information storage based on relative movement between record carrier and transducer G11B, e.g. G11B20/18; for static stores G11C)

Child Classifications

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• H03M 13/01 Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes since 2000 +1 CPC IPC+CPC Available in IPC and CPC
• H03M 13/03 Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words since 2000 +1 CPC IPC+CPC Available in IPC and CPC
• H03M 13/25 Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] since 2000 +5 CPC IPC+CPC Available in IPC and CPC
• H03M 13/27 using interleaving techniques since 2000 +14 CPC IPC+CPC Available in IPC and CPC
• H03M 13/29 combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes since 2000 +9 CPC IPC+CPC Available in IPC and CPC
• H03M 13/31 combining coding for error detection or correction and efficient use of the spectrum (without error detection or correction H03M5/14 ) since 2000 IPC+CPC Available in IPC and CPC
• H03M 13/33 Synchronisation based on error coding or decoding since 2000 +2 CPC IPC+CPC Available in IPC and CPC
• H03M 13/35 Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics since 2000 +2 CPC IPC+CPC Available in IPC and CPC
• H03M 13/37 Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 since 2000 +10 CPC IPC+CPC Available in IPC and CPC
• H03M 13/47 Error detection, forward error correction or error protection, not provided for in groups H03M13/01 - H03M13/37 since 2000 IPC+CPC Available in IPC and CPC
• H03M 13/61 +5 CPC CPC only CPC only
• H03M 13/63 +7 CPC CPC only CPC only
• H03M 13/65 +11 CPC CPC only CPC only