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Voice Codec Specifications Guide

The document lists various audio codecs used for voice communication, including their data rates, sampling rates, whether they support voice activity detection (VAD), and their packetization time. Codecs include G.711, G.722, G.729, GSM, AMR, EVRC, iLBC, Speex, EVS, and Opus, covering narrowband, wideband, super wideband and fullband bandwidths. Most support variable packetization times in multiples of 10 or 20 ms, while some like Speex and Opus have fixed packetization times. Many also support voice activity detection to reduce bandwidth during silence.

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114 views4 pages

Voice Codec Specifications Guide

The document lists various audio codecs used for voice communication, including their data rates, sampling rates, whether they support voice activity detection (VAD), and their packetization time. Codecs include G.711, G.722, G.729, GSM, AMR, EVRC, iLBC, Speex, EVS, and Opus, covering narrowband, wideband, super wideband and fullband bandwidths. Most support variable packetization times in multiples of 10 or 20 ms, while some like Speex and Opus have fixed packetization times. Many also support voice activity detection to reduce bandwidth during silence.

Uploaded by

ankurmishraer
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Codec Data Rate Sampling VAD Packetisation

Rate Supported Time (Ptime)

G.711 (PCM µ-law/A- 64 kbps 8000 No Multiples of 10 ms


law)

G.711 App II (PCM µ- 64 kbps 8000 Yes Multiples of 10 ms


law/A-law with VAD)

G.722 64 kbps 16000 No Multiples of 10 ms

G.722.1 (Wideband) 24 kbps 16000 No Multiples of 10 ms


32 kbps

G.729 8 kbps 8000 No Multiples of 10 ms

G.729B 8 kbps 8000 Yes Multiples of 10 ms

GSM 6.10 FR 13.2 kbps 8000 No Multiples of 20 ms

GSM EFR 12.2 kbps 8000 Yes Fixed at 20 ms. Multiple Ptime
Not Supported

GSM HR 5.6 kbps 8000 Yes Multiples of 20 ms

G.726 5 bit 40 8000 No Multiples of 10 ms


kbps
4 bit 32
kbps
3 bit 24
kbps
2 bit 16
kbps

G.726 (with VAD) 5 bit 40 8000 Yes Multiples of 10 ms


kbps
4 bit 32
kbps
3 bit 24
kbps
2 bit 16
kbps

AMR 4.75 kbps 8000 Yes Multiples of 20 ms


(requires additional 5.15 kbps
license) 5.9 kbps
6.7 kbps
7.4 kbps
7.95 kbps
10.2 kbps
12.2 kbps

AMR WB (Wideband) 6.60 kbps 16000 Yes Multiples of 20 ms


(requires additional 8.85 kbps
license) 12.65 kbps
14.25 kbps
15.85 kbps
18.25 kbps
19.85 kbps
23.05 kbps
23.85 kbps

EVRC, EVRC0 EVRC 8000 No Multiples of 20 ms


(requires additional Rates - 1/8,
license) 1/2 and 1

EVRCB , EVRCB0 EVRCB 8000 Yes Multiples of 20 ms


(requires additional Rates - 1/8,
license) 1/4, 1/2 and
1

EVRC_C (Wideband)   16000 Yes Multiples of 20 ms


(requires additional
license)

SMV Modes - 0, 8000 No Multiples of 20 ms


(requires additional 1, 2 and 3
license)

iLBC 15.2 kbps 8000 No Multiples of 20 ms


13.33 kbps Multiples of 30 ms

SPEEX (Narrow Band) 8 kbps 8000 Yes Fixed at 20 ms. Multiple Ptime
Not Supported
SPEEX (Wideband) 11.2 kbps 16000 Yes Fixed at 20 ms. Multiple Ptime
Not Supported

EVS (Narrow Band) 5.9 kbps 8000 Yes 20 ms to 100ms in multiples of


(requires additional 7.2 kbps 20msec
license) 8 kbps
9.6 kbps
13.2 kbps
16.4 kbps
24.4 kbps

EVS (Wideband) 5.9 kbps 16000 Yes 20 ms to 100ms in multiples of


(requires additional 7.2 kbps 20msec
license) 8 kbps
9.6 kbps
13.2 kbps
16.4 kbps
24.4 kbps
32 kbps
48 kbps
64 kbps
96 kbps
128 kbps

EVS (Super Wideband) 9.6 kbps 32000 Yes 20 ms to 100ms in multiples of


(requires additional 13.2 kbps 20msec
license) 16.4 kbps
24.4 kbps
32 kbps
48 kbps
64 kbps
96 kbps
128 kbps

EVS (Full Band) 16.4 kbps 48000 Yes 20 ms to 100ms in multiples of


(requires additional 24.4 kbps 20msec
license) 32 kbps
48 kbps
64 kbps
96 kbps
128 kbps

OPUS (Narrow Band) 6 to 128 8000 Yes Fixed at 20 ms


(requires additional kbps
license)

OPUS (Middle Band) 6 to 128 12000 Yes Fixed at 20 ms


(requires additional kbps
license)

OPUS (Wideband) 6 to 128 16000 Yes Fixed at 20 ms


(requires additional kbps
license)

OPUS (Super 6 to 128 24000 Yes Fixed at 20 ms


Wideband) kbps
(requires additional
license)

OPUS (Full Band) 6 to 128 48000 Yes Fixed at 20 ms


(requires additional kbps
license)

Link: https://www.gl.com/voice-codecs.html

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