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Voice Codecs - GL
https://www.gl.com/voice-codecs.html#:~:text=GSM%20EFR%20GSM-EFR%20%286.60%29%20is%20an%20improved%20and,an%20encoding%20fixed%20frame%20length%20of%2020%20ms.
GSM - Wikipedia
https://en.wikipedia.org/wiki/GSM
The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as mobile phones and tablets. It was first deployed in Finland in December 1991. By the mid-2010s, it became a global standard for …
Global System for Mobile Communications (GSM) - Signal ...
https://www.sigidwiki.com/wiki/Global_System_for_Mobile_Communications_(GSM)
Global System for Mobile Communications (GSM) Frequencies: 450 MHz,850 MHz,900 MHz,1800 MHz,1900 MHz : Frequency Range: 450 MHz - 1900 MHz: Mode: RAW: Modulation: GMSK: ACF — Emission Designator — Bandwidth: 200 kHz : Location: Worldwide: Short Description: GSM is a 2G digital cellular network standard developed by ETSI.
GSM frequency band
https://www.sqimway.com/gsm_band.php
Bandwidth (MHz) Uplink (MHz) Chanel number Arfcn: Duplex spacing (MHz) Low: Middle: High: Low: Middle: High: 380 T-GSM: 390.2: 395: 399.8: 9.6: 380.2: 385: 389.8: Dynamic: 10: 410 T-GSM: 420.2: 425: 429.8: 9.6: 410.2: 415: 419.8: Dynamic: 10: 450: 460.6: 464: 467.4: 6.8: 450.6: 454: 457.4: 259 - 293: 10: 480: 489: 492.4: 495.8: 6.8: 479: 482.4: 485.8: 306 - 340: 10: 710: 728.2: …
GSM Audio Codec: Vocoder: AMR, CELP etc .. » …
https://www.electronics-notes.com/articles/connectivity/2g-gsm/audio-codecs-vocoders-amr-celp.php
GSM Audio Codec / Vocoder ... AMR-WB has a bandwidth extending from 50 - 7000 Hz which is significantly wider than the 300 - 3400 Hz bandwidths used by standard telephones. However this comes at the cost of additional processing, but with advances in IC technology in recent years, this is perfectly acceptable. ...
Audio Bandwidth Extension Application Of Psychoacoustics ...
http://api.mindtime.com/audio%20bandwidth%20extension%20application%20of%20psychoacoustics%20signal%20processing%20and%20loudspeaker%20design%201%20pdf
Read Free Audio Bandwidth Extension Application Of Psychoacoustics Signal Processing And Loudspeaker ... GSM/EDGE is by far the World's most successful communications technology of all time. Ubiquitous, deployed in every country of the World, except in Japan and South Korea, GSM/EDGE is the result of a continued evolution that has spanned …
Voice Codecs - GL
https://www.gl.com/voice-codecs.html
GSM EFR GSM-EFR (6.60) is an improved and hence the Extended version of GSM-FR (6.10) codec. With sampling frequency of 8000 samples/sec and frame size of 31 bytes it achieves the bit rate of 12.2kbps with an encoding fixed frame length of 20 ms. Codec supports Voice Activity Detection (VAD) to allow saving of bandwidth. GSM HR
STL over GSM APN - Barix
https://www.barix.com/usecase/stl-over-gsm-apn
Studio Encoder, Transmitter Decoder, Studio Encoder / Decoder, Transmitter Encoder / Decoder. Up to 8 audio stream destinations. Audio formats are going from G.711 (µ/A-law) 8kHz/24kHz mono, over PCM 8kHz mono up to PCM 48kHz stereo and MP3. Local contents backup. customizable with BCL.
GSM surveillance - Detective store
https://www.detective-store.com/gsm-listening-devices-122
GSM listening devices use the same technology as mobile phones to upload recordings. The Detective Store offers a wide selection of hidden bugs, which only require the addition of a SIM card and you can start listening in. Just call the number on the card and any sounds within a few metres of the bug will be picked up and sent to you.
Bandwidth Utilisation for VoIP Calls
https://www.3cx.com/blog/docs/bandwidth-utilised-for-voip/
The above are stats for one audio stream. A VoIP call will use one audio stream for each leg (or endpoint). Thus a call between two parties will use double the bandwidth shown above. G729 is the codec which consumes the least bandwidth and has a relatively good audio quality. However that comes with two drawbacks:
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