Enhanced Full Rate or EFR or GSM-EFR or GSM 06.60 is a speech coding standard that was developed in order to improve the quality of GSM. Enhanced Full Rate...

called a codec. The speech codecs used in GSM are called Half-Rate (HR), Full-Rate (FR), Enhanced Full-Rate (EFR), Adaptive Multirate (AMR) and Wideband...

Enhanced Full Rate (EFR) and Adaptive Multi-Rate (AMR) standards, which provide much higher speech quality with lower bit rate. GSM-FR is specified in...

RFC 4749 dynamic GSM-EFR audio 1 8000 20 20 ITU-T GSM-EFR (GSM 06.60) RFC 3551 dynamic GSM-HR-08 audio 1 8000 20 ITU-T GSM-HR (GSM 06.20) RFC 5993 dynamic...

better protect these parts of the signal. GSM was further enhanced in 1997 with the enhanced full rate (EFR) codec, a 12.2 kbit/s codec that uses a full-rate...

wireless data (up to 28.8 kbit/s PDC-P). Voice codecs are PDC-EFR and PDC-HR. Compared to GSM, PDC's weak broadcast strength allows small, portable phones...

Half Rate (HR or GSM-HR or GSM 06.20) is a speech coding system for GSM, developed in the early 1990s. Since the codec, operating at 5.6 kbit/s, requires...

with DTX on Yes No GSM-HR VSELP 8 kHz 5.6 kbit/s 25 ms Yes No No No GSM-FR RPE-LTP 8 kHz 13 kbit/s 20–30 ms Yes No No No GSM-EFR ACELP 8 kHz 12.2 kbit/s...

telecommunications. Its best known work is the development and maintenance of: GSM and related 2G and 2.5G standards, including GPRS and EDGE UMTS and related...

GSM G2 network was made by Harri Holkeri, the Prime Minister of Finland. He used a prototype Nokia GSM phone to make the call. In 1992, the first GSM...