Editing Full Rate (section)

{{short description|Speech coding standard}}
{{Listen
| type         = music
| header       = Audio quality comparison
| filename     = GSM Full Rate audio demo.flac
| title        = Full Rate
| filename2    = Larynx-HiFi-GAN speech sample.wav
| title2       = Original file
}}

'''Full Rate''' ('''FR'''), also known as '''GSM-FR''' or '''GSM 06.10 ''' (sometimes simply '''GSM'''), was the first digital [[speech coding]] standard used in the [[GSM]] digital [[mobile phone]] system. It uses [[linear predictive coding]] (LPC). The bit rate of the codec is 13&nbsp;kbit/s, or 1.625 bits/audio sample (often padded out to 33 bytes/20 ms or 13.2&nbsp;kbit/s). The quality of the coded speech is quite poor by modern standards, but at the time of development (early 1990s) it was a good compromise between computational complexity and quality, requiring only on the order of a million additions and multiplications per second. The codec is still widely used in networks around the world. Gradually FR will be replaced by [[Enhanced Full Rate]] (EFR) and [[Adaptive Multi-Rate]] (AMR) standards, which provide much higher speech quality with lower bit rate.