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G.722.1 - Wikipedia
https://en.wikipedia.org/wiki/G.722.1#:~:text=The%20numbering%20of%20the%20wideband%20ITU%20audio%20codecs,quality%20than%20G.722%2C%20but%20is%20a%20transform-based%20codec.
ITU Speech Coders | ITU Voice Codecs
https://www.vocal.com/speech-coders/itu-vocoders/
The following ITU speech coders are available in optimized C/assembly code for embedded processors, DSPs and general purpose processors: G.711 – 64k bps PCM (A-law or μ-law form) G.722 – 7 kHz audio coding within 64 kbit/s (SB-ADPCM) G.722.1 – 24k and 32k bps, 7 kHz audio; G.722.2 – Adaptive Multi-Rate Wideband (GSM AMR-WB)
Audio coding for digital broadcasting - ITU: …
https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1196-8-201910-I!!MSW-E.docx
USAC is an audio coding standard that allows for the coding of speech, audio or any mixture of speech and audio with a consistent audio quality for all sound material over a wide range of bitrates. It supports single and multi-channel coding at high bitrates where it provides perceptually transparent quality.
G series - ITU
https://www.itu.int/net/itu-t/sigdb/speaudio/Gseries.htm
Rec. ITU-T G.720.1 describes an independent front-end processing module implementing a generic sound activity detector (GSAD) that can be applied prior to signal processing applications and can operate on narrowband or wideband audio input using 10 ms frame length (without lookahead), such as used by speech or audio codecs. The primary function of the GSAD is to …
7 kHz audio-coding within 64 kbit/s - ITU: Committed to ...
https://www.itu.int/rec/T-REC-G.722/e
7 kHz audio-coding within 64 kbit/s Corresponding ANSI-C code is available in the G722 module of the ITU-T G.191 Software Tools Library: Superseded : G.722 (1988) Erratum 1 (05/03) Superseded : G.722 (1988) Amendment 1 (11/10) New Annex B with superwideband embedded extension Superseded : G.722 (1988) Amendment 2 (03/11)
Recommendation ITU-R BS.1196-7
https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1196-7-201901-S!!PDF-E.pdf
RECOMMENDATION ITU-R BS.1196-7* Audio coding for digital broadcasting (Question ITU-R 19-1/6) (1995-2001-2010-2012-02/2015-10/2015-2017-2019) Scope This Recommendation specifies audio source coding systems applicable for digital sound and television broadcasting.
- Low delay audio coding for broadcasting …
https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BS.2161-2009-PDF-E.pdf
REPORT ITU-R BS.2161 Low delay audio coding for broadcasting applications (2009) 1 Operational requirements of a low delay audio coding 1.1 Requirements for digital wireless microphones For wireless microphones, it is essential to reduce latency so that the sound of voice such as speech or vocals is reproduced from loudspeakers simultaneously.
The First ITU T Standard for Full Band Audio
https://www.broadconnect.ca/resource-centre/white-papers/voice-solutions/g719-the-first-itu-t-standard-for-full-band-audio.pdf
kHz audio. ITU-T G.722 was the first practical wideband codec, providing 7 kHz audio bandwidth at 48 to 64 kbps. Polycom entered the forefront of audio codec development with Siren 7 (7 kHz audio at 16 to 32 kbps), standardized by ITU-T as G.722.1 (7 kHz, 16/24/32 kbps). Figure 1 provides an overview of the most popular codecs.
A-Law Compressed Sound Format - loc.gov
https://www.loc.gov/preservation/digital/formats/fdd/fdd000038.shtml
From Archived Voice Codecs FAQ from Nuvoton:"µ-law and A-law are audio compression schemes defined by ITU-T G.711 that compress 16 bit linear data down to 8 bits of logarithmic data. The encoding process (referred to logarithmic companding) breaks the linear data into segments with each progressively higher segment doubling in size.
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