H04SLevel 3

STEREOPHONIC SYSTEMS

**Definition:** This place covers:

Signal processing or circuitry for two or more channel sound reproduction, using loudspeakers or headphones, or for two or more channel sound capture, using microphones.

**Glossary:** - Stereophonic system: two or more channel system, e.g. quadraphonic, ambisonic or similar systems - Multi-channel system: three- or more channel system

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H04S 1/00Two-channel systems

H04S 2400/00Details of stereophonic systems covered by

H04S 2420/00Techniques used stereophonic systems covered by

H04S 3/00Systems employing more than two channels, e.g. quadraphonic

H04S 5/00Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation

H04S 7/00Indicating arrangements

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