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Siren (codec) - Editions
https://www.liquisearch.com/siren_codec/editions
Siren (codec) - Editions Siren (codec) - Editions Editions Siren 7 (or Siren7 or simply Siren) provides 7 kHz audio, bit rates 16, 24, 32 kbit/s and sampling frequency 16 kHz. Siren is derived from PictureTel's PT716plus algorithm. In 1999, ITU-T approved G.722.1 recommendation, which is based on Siren 7 algorithm.
Siren - MultimediaWiki
https://wiki.multimedia.cx/index.php/Siren
This audio codec is used by MSN Messenger for sending/receiving voice clips. It is also one of the available codecs for the 'Computer Call' feature (audio conference). It is based on the G722.1 codec and only has a few differences to it.
Siren & SirenSR codecs
https://social.msdn.microsoft.com/Forums/en-US/e0de3255-bdb2-4c5c-9167-cff0231569f9/siren-sirensr-codecs
The codec that is used is specified in the format ('fmt') chunk of the wave file. PCM data will have WAVE_FORMAT_PCM, while Siren would probably have WAVE_FORMAT_POLYCOM_SIREN, maybe WAVE_FORMAT_VIVO_SIREN. See include file mmreg.h provided by Microsoft for the definition of these constants.
G.722 Audio Codec - VideoConferencing
https://www.video-conferencing.com/definition/g.722.html
G.722.1 was developed by Polycom as their Siren codec. G.722.1 provides 7 kHz wideband encoding and operates at transmission rates of 24Kbps and 32Kbps, which are both, lower than the G.722 standard. Polycom notes that it has an extension that operates as low as 16Kbps. This codec, when negotiated properly between devices is capable of producing excellent audio …
Video and Audio Codecs used by Standards Compliant …
https://www.c21video.com/technical-papers/skype-for-business/appendix-c--h-323-and-sip-video-codecs
SIREN is a family of patented audio codecs originally developed and licensed PictureTel; who were then acquired Polycom. There are currently three derivatives of SIREN, namely SIREN 7, SIREN 14 and SIREN 22 and as their name implies, they support sampling rates of 7, 14 and 22 kHz respectively.
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