What is G.711?
G.711 is the standard narrowband codec used across traditional telephony. It encodes audio at 8 kHz sample rate and 64 kbps bit rate using µ-law (North America, Japan) or A-law (rest of the world) compression.
How does G.711 work?
G.711 applies logarithmic compression to each 16-bit PCM sample, mapping it to 8 bits using either the µ-law or A-law companding curve. This preserves perceptual quality at conversational levels while drastically reducing bandwidth, but it caps frequency content at 4 kHz and introduces quantization noise in the process.
How does ai-coustics handle G.711?
Quail is trained on degraded telephony audio, including narrowband 8 kHz conditions that match G.711. That is why it performs well in real contact center and SIP pipelines where the incoming signal has already been heavily band-limited by the codec, rather than requiring clean wideband input.
