G.711
E93646
G.711 is a widely used ITU-T audio codec standard for pulse code modulation (PCM) of voice in traditional telephony and VoIP systems.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| G.711.0 | 1 |
| ITU-T Recommendation G.711 | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
ITU-T recommendation
ⓘ
audio codec standard ⓘ pulse code modulation standard ⓘ |
| advantage | high quality with low complexity ⓘ |
| applicationDomain |
VoIP
ⓘ
multimedia communications ⓘ telephony ⓘ |
| audioBandwidth | 300–3400 Hz ⓘ |
| backwardCompatibilityWith | traditional PSTN ⓘ |
| bitRate | 64 kbit/s ⓘ |
| channelType | narrowband ⓘ |
| codingMethod | pulse code modulation ⓘ |
| codingType | waveform codec ⓘ |
| compandingLaw |
A-law
ⓘ
μ-law ⓘ |
| comparedTo |
G.722
NERFINISHED
ⓘ
G.729 NERFINISHED ⓘ |
| compressionRatio | approximately 2:1 relative to linear PCM ⓘ |
| compressionType | logarithmic PCM companding ⓘ |
| definedIn | ITU-T Recommendation G.711 NERFINISHED ⓘ |
| delayCharacteristic | very low algorithmic delay ⓘ |
| disadvantage | relatively high bit rate for modern networks ⓘ |
| firstStandardized | 1972 ⓘ |
| focus |
audio companding
ⓘ
voice encoding ⓘ |
| frameSize | 1 sample per 125 µs ⓘ |
| licenseStatus | generally royalty-free ⓘ |
| mosScore | around 4.1 ⓘ |
| packetizationTypical | 20 ms in VoIP implementations ⓘ |
| publishedBy | ITU-T NERFINISHED ⓘ |
| qualityLevel | narrowband telephony quality ⓘ |
| regionUsage |
A-law predominantly used in Europe
ⓘ
μ-law predominantly used in Japan ⓘ μ-law predominantly used in North America ⓘ |
| sampleSize | 8 bits per sample ⓘ |
| samplingRate | 8 kHz ⓘ |
| sector | ITU Telecommunication Standardization Sector NERFINISHED ⓘ |
| standardNumber | G.711 self-link ⓘ |
| successorOrRelatedStandard |
G.711
self-linksurface differs
ⓘ
surface form:
G.711.0
G.711.1 NERFINISHED ⓘ |
| usedIn |
H.323 systems
ⓘ
IP phones ⓘ ISDN ⓘ PBX systems ⓘ SIP-based systems ⓘ VoIP gateways ⓘ Public Switched Telephone Network ⓘ
surface form:
public switched telephone network
|
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
ITU-T Recommendation G.711
this entity surface form:
G.711.0