IPC Subgroup
G10L 21/02 Speech enhancement, e.g. noise reduction or echo cancellation
Introduced: January 2000
Last revised: January 2013
Full Title
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
Classification Context
- Section:
- PHYSICS
- Class:
- MUSICAL INSTRUMENTS; ACOUSTICS
- Subclass:
- SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
Additional Content
Reducing echo effects in line transmission systems Echo suppression in hands-free telephones
Related Keywords
speech enhancement in NOISESPEECH enhancement
4 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- G10L 21/0208 Noise filtering
- G10L 21/0272 Voice signal separating
- G10L 21/0316 by changing the amplitude
- G10L 21/038 using band spreading techniques
Top Applicants
Top 10 applicants by patent filingsfor class G10, 2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 5,218
- GOOGLE US 4,644
- FRAUNHOFER DE 4,601
- SONY CORPORATION JP 2,380
- HUAWEI TECHNOLOGIES COMPANY CN 2,179
- YAMAHA CORPORATION 2,120
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 1,974
- MICROSOFT TECHNOLOGY LICENSING US 1,916
- AMAZON TECHNOLOGIES US 1,866
- DOLBY LABORATORIES LICENSING CORPORATION US 1,843