De Ce Contează Codec-ul
Codec-ul audio determină calitatea vocii, latența și bandwidth-ul necesar. Alegerea corectă depinde de use case și infrastructură.
Opus
Recomandat pentru web
G.711
Pentru telefonie
G.722
HD Voice
Codec Comparison
Opus
WebRTC, modern appsBitrate
6-510 kbps
Latency
2.5-60ms
Quality
9.5/10
Pros
- + Best quality/bitrate ratio
- + Variable bitrate
- + Low latency mode
Cons
- - Not universal in telephony
G.711 (PCMU/PCMA)
PSTN, traditional telephonyBitrate
64 kbps
Latency
0.125ms
Quality
7.5/10
Pros
- + Universal telephony support
- + Zero algorithmic delay
- + Simple
Cons
- - High bandwidth
- - No compression
G.722
HD Voice, VoIPBitrate
48-64 kbps
Latency
1.5ms
Quality
8.5/10
Pros
- + Wideband (7kHz)
- + Good quality
- + Telephony compatible
Cons
- - Higher latency than G.711
- - Limited adoption
AAC
Streaming, recordingBitrate
32-320 kbps
Latency
20-50ms
Quality
9.0/10
Pros
- + Excellent quality
- + Wide support
- + Efficient compression
Cons
- - Higher latency
- - Not ideal for real-time
Quick Comparison
| Metric | Winner | Reason |
|---|---|---|
| Best Quality | Opus | Superior at all bitrates |
| Lowest Latency | G.711 | No algorithmic delay |
| Best for VoIP | Opus | Adaptive, robust |
| Telephony Compatible | G.711 | Universal PSTN |
| Bandwidth Efficient | Opus | 6 kbps possible |
Kallina Recommendations
Web/Mobile Apps
Opus @ 24-48 kbps - Best quality with low bandwidth
PSTN Integration
G.711 PCMU - Universal compatibility
SIP/VoIP
G.722 sau Opus - HD quality when supported