H04S STEREOPHONIC SYSTEMS
Introduced: January 1980
Description
H04S covers the transmission, reception, and processing of stereophonic audio signals, including systems for creating, encoding, and reproducing sound with spatial dimension using multiple channels. This classification encompasses stereophonic microphone techniques, stereo signal encoding and decoding methods, and equipment for stereo broadcasting and reproduction. It includes systems for both analog and digital stereophonic transmission, as well as related technologies for surround sound and spatial audio reproduction.
Of 6 combined children, 4 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H04S 1/00 Two-channel systems (H04S5/00, H04S7/00 take precedence) since 1980 +2 CPC IPC+CPC Available in IPC and CPC
- H04S 2400/00 Details of stereophonic systems covered by H04S but not provided for in its groups 2nd only +8 CPC CPC only CPC only
- H04S 2420/00 Techniques used stereophonic systems covered by H04S but not provided for in its groups 2nd only +6 CPC CPC only CPC only
- H04S 3/00 Systems employing more than two channels, e.g. quadraphonic (H04S5/00, H04S7/00 take precedence) since 1980 +3 CPC IPC+CPC Available in IPC and CPC
- H04S 5/00 Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- H04S 7/00 Indicating arrangements; Control arrangements, e.g. balance control since 1980 +2 CPC IPC+CPC Available in IPC and CPC