H03M CODING, DECODING OR CODE CONVERSION, IN GENERAL
Introduced: January 1985
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- CODING, DECODING OR CODE CONVERSION, IN GENERAL
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).
Related Keywords
8 direct subcodes
Child Classifications
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- H03M 1/00 Analogue/digital conversion; Digital/analogue conversion
- H03M 11/00 Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- 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
- H03M 3/00 Conversion of analogue values to or from differential modulation
- H03M 5/00 Conversion of the form of the representation of individual digits
- 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
- H03M 9/00 Parallel/series conversion or
- H03M 99/00 Subject matter not provided for in other groups of this subclass
Top Applicants
Top 10 applicants by patent filingsfor class H03, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 5,625
- SAMSUNG ELECTRONICS COMPANY KR 5,496
- MURATA MANUFACTURING COMPANY JP 5,478
- HUAWEI TECHNOLOGIES COMPANY CN 3,383
- INTEL CORPORATION US 3,091
- TEXAS INSTRUMENTS US 3,070
- MURATA MANUFACTURING COMPANY 2,722
- SKYWORKS SOLUTIONS US 2,290
- SEIKO EPSON CORPORATION 2,177
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158