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H.261

video compression standard
Thing itu_t_recommendations_h_series Q1148249

Facts

6 properties
Instance of
ITU-T recommendations H-series, video compression format[2]
Publication date
1988[5]
Follows
H.120[3]
Followed by
H.262/MPEG-2 Video[4]
File extension
h261[7]
Media type
video/H261[6]
🏷️ Also known as
en H.261 de H261 el Η.261 fr H261 ja H261
🔖 Identifiers · 3
Freebase ID
/m/01tn0f
ITU-T Recommendation
H.261
ITU/ISO/IEC object ID
0.0.8.261

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🔗 Connections
Followed by 1
H.262/MPEG-2 Video
Followed by (predecessor) 1
H.262/MPEG-2 Video
Follows 1
H.120
Instance of 1
video compression format
Preceded by (successor) 1
H.120
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Summary

H.261 is an ITU-T recommendations H-series[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . RFC 4587: RTP Payload Format for H.261 Video Streams. wikidata.org.
  6. [7] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). H.261. Retrieved November 4, 2026, from https://4ort.xyz/entity/h-261
MLA “H.261.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Nov. 2026, https://4ort.xyz/entity/h-261.
BibTeX @misc{4ortxyz_h-261_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{H.261}}, year = {2026}, url = {https://4ort.xyz/entity/h-261}, note = {Accessed: 2026-11-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): H.261 — https://4ort.xyz/entity/h-261 (retrieved 2026-11-04)

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