H04M9/10 - CPC Classification Index

ClassID:

227813 ⎘

H04M9/10 - CPC Classification

Classification description:

Arrangements for interconnection not involving centralised switching; Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Recent Application in this class:

20230353684

METHOD AND ELECTRONIC DEVICE FOR REMOVING ECHO FLOWING IN DUE TO EXTERNAL DEVICE

20200099793

Receive-path signal gain operations

20190281162

Echo time delay detection method, echo elimination chip, and terminal equipment

20180352095

Echo time delay detection method, echo elimination chip, and terminal equipment

20150327035

FAR-END CONTEXT DEPENDENT PRE-PROCESSING

20070154001

High quality audio conferencing with adaptive beamforming

20050094795

High quality audio conferencing with adaptive beamforming