H.263
E268864
H.263 is a video compression standard developed primarily for low-bitrate communication such as video conferencing and early internet video applications.
All labels observed (7)
| Label | Occurrences |
|---|---|
| H.263 canonical | 1 |
| H.263+ (H.263v2) | 1 |
| H.263++ (H.263v3) | 1 |
| H.263v1 | 1 |
| H.263v2 (H.263+) | 1 |
| H.263v3 (H.263++) | 1 |
| ITU-T Recommendation H.263 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2448058 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: H.263 Context triple: [H.264, predecessor, H.263]
-
A.
H.264
H.264 is a widely used video compression standard known for delivering high-quality video at relatively low bitrates, commonly employed in streaming, broadcasting, and video recording.
-
B.
MPEG
MPEG is a family of widely used digital audio and video compression standards developed by the Moving Picture Experts Group for efficient storage and transmission of multimedia content.
-
C.
H.265
H.265, also known as High Efficiency Video Coding (HEVC), is a video compression standard designed to significantly reduce bandwidth and storage requirements compared to its predecessor H.264 while maintaining high visual quality.
-
D.
H.323
H.323 is an ITU-T standard that defines protocols for voice, video, and data communication over packet-based networks such as IP.
-
E.
ISO/IEC 14496-3
ISO/IEC 14496-3 is an international standard that specifies the audio coding technologies of MPEG-4, including Advanced Audio Coding (AAC) and related audio formats.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: H.263 Target entity description: H.263 is a video compression standard developed primarily for low-bitrate communication such as video conferencing and early internet video applications.
-
A.
H.264
H.264 is a widely used video compression standard known for delivering high-quality video at relatively low bitrates, commonly employed in streaming, broadcasting, and video recording.
-
B.
MPEG
MPEG is a family of widely used digital audio and video compression standards developed by the Moving Picture Experts Group for efficient storage and transmission of multimedia content.
-
C.
H.265
H.265, also known as High Efficiency Video Coding (HEVC), is a video compression standard designed to significantly reduce bandwidth and storage requirements compared to its predecessor H.264 while maintaining high visual quality.
-
D.
H.323
H.323 is an ITU-T standard that defines protocols for voice, video, and data communication over packet-based networks such as IP.
-
E.
ISO/IEC 14496-3
ISO/IEC 14496-3 is an international standard that specifies the audio coding technologies of MPEG-4, including Advanced Audio Coding (AAC) and related audio formats.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
video codec
ⓘ
video compression standard ⓘ |
| alsoKnownAs |
H.263
ⓘ
surface form:
ITU-T Recommendation H.263
|
| basedOn | H.261 design principles ⓘ |
| category | video coding ⓘ |
| codingType | block-based hybrid video coding ⓘ |
| compressionType | lossy compression ⓘ |
| designedFor | narrowband communication channels ⓘ |
| developedBy |
ITU Telecommunication Standardization Sector
ⓘ
surface form:
ITU-T
|
| fileFormatSupport |
3GP
ⓘ
FLV (early versions) ⓘ RealMedia ⓘ |
| firstEditionApproved | 1995 ⓘ |
| improvesOn | H.261 compression efficiency ⓘ |
| optimizedFor | bit rates below 64 kbit/s ⓘ |
| partOfSeries | H.26x ⓘ |
| predecessor | H.261 ⓘ |
| region | international standard ⓘ |
| standardBody |
ITU Telecommunication Standardization Sector
ⓘ
surface form:
ITU
|
| standardizedBy | ITU-T Study Group 16 ⓘ |
| successor |
H.263
self-linksurface differs
ⓘ
surface form:
H.263+ (H.263v2)
H.263 self-linksurface differs ⓘ
surface form:
H.263++ (H.263v3)
H.264 ⓘ |
| supports |
CIF resolution
ⓘ
QCIF resolution ⓘ sub-QCIF resolution ⓘ |
| supportsFeature |
PB-frames (optional mode)
ⓘ
advanced prediction mode ⓘ spatial scalability (in later versions) ⓘ syntax-based arithmetic coding (optional mode) ⓘ temporal scalability (in later versions) ⓘ unrestricted motion vectors (optional mode) ⓘ |
| targetApplication |
early internet video
ⓘ
low-bitrate video communication ⓘ multimedia messaging ⓘ video conferencing ⓘ videophone services ⓘ |
| usedIn |
3GPP multimedia services (early generations)
ⓘ
internet streaming (early deployments) ⓘ video conferencing systems ⓘ |
| usedWith |
H.245
ⓘ
surface form:
H.245 control protocol
H.324 multimedia over circuit-switched networks ⓘ |
| usesTechnique |
discrete cosine transform
ⓘ
entropy coding ⓘ motion-compensated prediction ⓘ |
| version |
H.263
self-linksurface differs
ⓘ
surface form:
H.263v1
H.263 self-linksurface differs ⓘ
surface form:
H.263v2 (H.263+)
H.263 self-linksurface differs ⓘ
surface form:
H.263v3 (H.263++)
|
| yearStandardFirstApproved | 1995 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: H.263 Description of subject: H.263 is a video compression standard developed primarily for low-bitrate communication such as video conferencing and early internet video applications.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
ITU-T Recommendation H.263