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G.726 Audio Vocoder Solution - NXP
https://www.nxp.com/docs/en/application-note/AN5255.pdf
The G.726 standard was introduced in 1990 and supersedes both the G.721 and G.723 introduced earlier. The four supported bit rates correspond to the bit size of the compressed audio sample (2, 3, 4, and 5 bits). The most common bitrate is 32 kbit/s. It is a standard codec used in DECT wireless phone systems. 1.3. G.726 features
G.726 - Cisco Community
https://community.cisco.com/t5/collaboration-voice-and-video/g-726/ta-p/3118715
The four bit rates associated with G.726 are often referred to by the bit size of a sample, which are 2-bits, 3-bits, 4-bits, and 5-bits respectively. The most commonly used mode is 32 kbps, since this is half the rate of G.711, thus increasing the usable network capacity by 100%. It is primarily used on international trunks in the phone network.
spandsp: G.726 tests - soft-switch.org
https://www.soft-switch.org/spandsp-doc/g726_tests_page.html
A generally audio quality test, consisting of compressing and decompressing a speeech file for audible comparison. The speech file should be recorded at 16 bits/sample, 8000 samples/second, and named "pre_g726.wav". How is it used? To perform the tests in the G.726 specification you need to obtain the test data files from the specification.
G.726 Speech Coder DSP C Code - Algotron
http://www.algotron.com/audio/g726_c.htm
The G.726 software operates in 3 sample-coding modes. In linear mode, the encoder inputs and the decoder outputs 14-bit samples. In PCM mode, the samples are in 8-bit G.711 PCM codes, either A-law or -law. In PCM+SCA mode, the PCM samples at the output
G.726 Adaptive Differential Pulse Code Modulation …
https://www.ti.com/lit/an/spra118/spra118.pdf
through a PCM process before transforming to an ADPCM sample. In the G.726 recommendation, which currently includes G.721 and G.723 recommendations of the International Telegraph and Telephone Consultative Committee (CCITT), it is specified that an 8-bit PCM word should be reduced to a 4-bit ADPCM word, correspondingly reducing the bit flow
G.726 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/G.726
ITU-T G.191 software tools for speech and audio coding, including G.726 C code RFC 3551 - RTP Profile for Audio and Video Conferences with Minimal Control, G726 …
algorithm - Which audio codec G.722 or G.726 offer ...
https://stackoverflow.com/questions/18485910/which-audio-codec-g-722-or-g-726-offer-improved-stability-and-lower-delays
Audio quality: 722: 16 kHz, 64 kb/s, 14 bits/sample; 726: 8 kHz, <=40 kb/s, 13 bits/sample; Latency: 722: 4000 us; 726: 125 us; So it depends on what you want more. 722 clearly has the better quality, but at a higher latency. The latency isn't all that bad, though, compared to other formats.
Audio codecs - Columbia University
https://www.cs.columbia.edu/~hgs/audio/codecs.html
sample Now described in G.726; obsolete. G.722: ITU-T: 7 kHz audio-coding within 64 kbit/s 64 16 sample Subband-codec that divides 16 kHz band into two subbands, each coded using ADPCM G.722.1: ITU-T: Coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss 24/32 16 20 See also; G.723 ITU-T
Speech Codecs: Pros & Cons | This blog explain about ...
https://speechcodecs.wordpress.com/
G.726. Overview. G.726 is an ADPCM speech codec for the transmission of voice at rates of 16, 24, 32, and 40 kbit/s.G.721 and G.723 had been folded into G.726. Pros. Uses 32 Kbits which is half the rate of G.711 codec and hence increasing the usable network capacity by 100%; Very much used on international trunks in the phone network. Cons
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