characterised by the method used for estimating noise

Introduced: January 2013

Full Title

Full titles differ between systems:

IPC:

Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility > Speech enhancement, e.g. noise reduction or echo cancellation > Noise filtering > characterised by the method used for estimating noise

CPC:

Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility (G10L19/00 takes precedence) > Speech enhancement, e.g. noise reduction or echo cancellation (reducing echo effects in line transmission systems H04B3/20; echo suppression in hands-free telephones H04M9/08) > Noise filtering > characterised by the method used for estimating noise

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

IPC defines codes here since 2013.

Child Classifications

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G10L 2021/02161 2nd only +3 CPC CPC only CPC only
G10L 2021/02168 2nd only CPC only CPC only
G10L 21/0224 Processing in the time domain since 2013 IPC+CPC Available in IPC and CPC
G10L 21/0232 Processing in the frequency domain since 2013 IPC+CPC Available in IPC and CPC