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CPC Subgroup Additional Only
G10H 2250/221

Cosine transform; DCT [discrete cosine transform], e.g. for use in lossy audio compression such as MP3

Full Title

Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing > Mathematical functions for musical analysis, processing, synthesis or composition > Transforms, i.e. mathematical transforms into domains appropriate for musical signal processing, coding or compression > Cosine transform; DCT [discrete cosine transform], e.g. for use in lossy audio compression such as MP3

1 direct subcode

Child Classifications

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  • G10H 2250/225 MDCT [Modified discrete cosine transform], i.e. based on a DCT of overlapping data

Top Applicants

Top 10 applicants by patent filingsfor class G10, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 6,277
  2. GOOGLE US 5,429
  3. FRAUNHOFER DE 4,984
  4. SONY CORPORATION JP 2,808
  5. HUAWEI TECHNOLOGIES COMPANY CN 2,577
  6. MICROSOFT TECHNOLOGY LICENSING US 2,382
  7. DOLBY LABORATORIES LICENSING CORPORATION US 2,123
  8. QUALCOMM US 2,117
  9. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,049
  10. AMAZON TECHNOLOGIES US 1,924