H03M CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)
Introduced: January 1985
Description
H03M covers the design and implementation of electronic circuits and devices for encoding, decoding, and converting information between different coding schemes and signal formats. This includes analog-to-digital converters (ADCs), digital-to-analog converters (DACs), error-correcting code circuits, modulation and demodulation circuits, and general data conversion systems. The subclass addresses the physical circuitry and hardware implementations rather than the mathematical algorithms or software aspects of coding theory. Related signal processing and transmission topics are handled in adjacent classes such as H04L (digital information transmission) and G06F (digital computing).
Title
Titles differ between systems:
IPC: CODING, DECODING OR CODE CONVERSION, IN GENERAL
CPC: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)
Full Title
Full titles differ between systems:
CODING, DECODING OR CODE CONVERSION, IN GENERAL
CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)
IPC and CPC are identically structured here. All 8 subcodes exist in both systems.
4 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
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- H03M 1/00 Analogue/digital conversion; Digital/analogue conversion (conversion of analogue values to or from differential modulation H03M3/00) since 1985 +3 CPC IPC+CPC Available in IPC and CPC
- H03M 11/00 Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys (keyboard switch arrangements, structural association of coders and keyboards H01H13/70, H03K17/94) since 1985 +2 CPC IPC+CPC Available in IPC and CPC
- H03M 13/00 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) since 1985 +3 CPC IPC+CPC Available in IPC and CPC
- H03M 3/00 Conversion of analogue values to or from differential modulation since 1985 +1 CPC IPC+CPC Available in IPC and CPC
- H03M 5/00 Conversion of the form of the representation of individual digits since 1985 IPC+CPC Available in IPC and CPC
- H03M 7/00 Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits since 1985 +1 CPC IPC+CPC Available in IPC and CPC
- H03M 9/00 Parallel/series conversion or vice versa (digital stores in which the information is moved stepwise per se G11C19/00) since 1985 IPC+CPC Available in IPC and CPC
- H03M 99/00 Subject matter not provided for in other groups of this subclass since 2006 IPC+CPC Available in IPC and CPC