compression
Discrete cosine transform
The frequency transform at the heart of JPEG and H.264.
Convert a file nowHow Discrete cosine transform works
The DCT converts blocks of pixels into frequency coefficients. Quantising the high-frequency coefficients away is what makes JPEG small and, irreversibly, lossy.
- Family
- lossy
Discrete cosine transform scores
Deterministic scores calculated from the structured facts above. Identical facts always produce identical scores.
Overall score
83/100
Archiving score
100- it is a current, actively maintained format
- it is actively maintained and current
Confidence 36% · evidence coverage 56%
Longevity score
89- it is actively maintained and current
- it is a current, actively maintained format
- it occupies a niche corner of the ecosystem
Confidence 38% · evidence coverage 75%
Related to Discrete cosine transform
Compression used
Data quality
Every claim on this page is classified as a verified fact, a derived fact or an assumption.
- Overall confidence
- 90%
- Verification status
- verified
- Last reviewed
- 2026-08-03
- Verified facts
- 1
1 classified claim backed by 1 source.
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Sources and review status
Review status: verified · confidence 90%
Last reviewed 2026-08-03 (revision 1).
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