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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

Filing statistics

CPC G10H 2250/221 belongs to the parent subclass G10H, which recorded 17,124 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,186 in 2013 to 1,533 in 2023 (+29%), peaking at 1,888 applications in 2020. The most active applicants in class G10 are SAMSUNG ELECTRONICS COMPANY (6,277 applications), GOOGLE (5,429 applications) and FRAUNHOFER (4,984 applications).

Source: EPO PATSTAT, worldwide filings

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