Speex
E334057
Speex is an open-source, patent-free audio compression codec designed primarily for efficient, high-quality speech encoding.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Speex canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T3167569 — 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: Speex Context triple: [Apple iChat, supportsAudioStandard, Speex]
-
A.
G.722
G.722 is a wideband audio codec standard that provides higher-quality voice transmission than traditional narrowband codecs, commonly used in VoIP and teleconferencing applications.
-
B.
G.729
G.729 is a widely used ITU-T audio codec standard that compresses voice for bandwidth-efficient transmission in VoIP and other telephony applications.
-
C.
G.711
G.711 is a widely used ITU-T audio codec standard for pulse code modulation (PCM) of voice in traditional telephony and VoIP systems.
-
D.
Advanced Audio Coding
Advanced Audio Coding is a lossy digital audio compression format designed to provide better sound quality than MP3 at similar or lower bitrates and widely used in streaming, broadcasting, and multimedia applications.
-
E.
HE-AAC v2
HE-AAC v2 is an advanced audio codec profile that combines AAC with spectral band replication and parametric stereo to deliver high-quality sound at very low bitrates, commonly used in streaming and broadcasting.
- 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: Speex Target entity description: Speex is an open-source, patent-free audio compression codec designed primarily for efficient, high-quality speech encoding.
-
A.
G.722
G.722 is a wideband audio codec standard that provides higher-quality voice transmission than traditional narrowband codecs, commonly used in VoIP and teleconferencing applications.
-
B.
G.729
G.729 is a widely used ITU-T audio codec standard that compresses voice for bandwidth-efficient transmission in VoIP and other telephony applications.
-
C.
G.711
G.711 is a widely used ITU-T audio codec standard for pulse code modulation (PCM) of voice in traditional telephony and VoIP systems.
-
D.
Advanced Audio Coding
Advanced Audio Coding is a lossy digital audio compression format designed to provide better sound quality than MP3 at similar or lower bitrates and widely used in streaming, broadcasting, and multimedia applications.
-
E.
HE-AAC v2
HE-AAC v2 is an advanced audio codec profile that combines AAC with spectral band replication and parametric stereo to deliver high-quality sound at very low bitrates, commonly used in streaming and broadcasting.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
audio codec
ⓘ
free software ⓘ open-source software ⓘ speech codec ⓘ |
| algorithm |
CELP
ⓘ
linked to:
MPEG-4 CELP
code-excited linear prediction ⓘ |
| bitRateRange | 2 kbps to 44 kbps ⓘ |
| compressionType | lossy compression ⓘ |
| containerFormat | Ogg ⓘ |
| designedFor |
VoIP applications
ⓘ
audio streaming ⓘ internet telephony ⓘ |
| developer | Jean-Marc Valin ⓘ |
| feature |
acoustic echo cancellation support
ⓘ
discontinuous transmission ⓘ intensity stereo coding ⓘ narrowband mode ⓘ noise suppression support ⓘ packet loss concealment ⓘ ultra-wideband mode ⓘ variable bit-rate encoding ⓘ voice activity detection ⓘ wideband mode ⓘ |
| fileExtension | .spx ⓘ |
| license |
Revised BSD License
ⓘ
linked to:
BSD license
|
| maintainer | Xiph.Org Foundation ⓘ |
| openSource | true ⓘ |
| optimizedFor |
low bit-rate speech
ⓘ
real-time communication ⓘ |
| organization | Xiph.Org Foundation ⓘ |
| partOf |
Xiph.Org multimedia projects
ⓘ
linked to:
Xiph.Org Foundation
|
| patentStatus | patent-free ⓘ |
| platform | cross-platform ⓘ |
| primaryUse | speech encoding ⓘ |
| programmingLanguage | C ⓘ |
| samplingRateSupport |
16 kHz
ⓘ
32 kHz ⓘ 8 kHz ⓘ |
| status | superseded by Opus for most uses ⓘ |
| successor | Opus ⓘ |
| supports |
fixed-point implementation
ⓘ
floating-point implementation ⓘ narrowband speech ⓘ ultra-wideband speech ⓘ wideband speech ⓘ |
| useCase |
IP-PBX systems
ⓘ
embedded systems ⓘ softphones ⓘ |
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: Speex Description of subject: Speex is an open-source, patent-free audio compression codec designed primarily for efficient, high-quality speech encoding.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.