H04 ELECTRIC COMMUNICATION TECHNIQUE
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
Description
H04 – ELECTRIC COMMUNICATION TECHNIQUE This class encompasses the technical and engineering aspects of electrical communication systems, including signal transmission, reception, and processing across various media and frequencies. It covers wire-based communication (telephony, telegraphy, data transmission), wireless communication (radio, microwave, satellite), optical communication, and associated infrastructure such as switching, routing, and network control systems. The class includes technologies for analog and digital signal modulation, coding, multiplexing, and error detection/correction, as well as the hardware and methods for establishing and maintaining communication links. Adjacent classes within the broader electrical field provide related coverage of power distribution (H02), lighting (H05B), and specific electronic components used in communication systems.
11 direct subcodes
Child Classifications
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- H04B TRANSMISSION
- H04H BROADCAST COMMUNICATION
- H04J MULTIPLEX COMMUNICATION
- H04K SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04M TELEPHONIC COMMUNICATION
- H04N PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04Q SELECTING
- H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04S STEREOPHONIC SYSTEMS
- H04W WIRELESS COMMUNICATION NETWORKS