Editing Enhanced full rate (section)

== Technology ==
The sampling rate is 8000 sample/s leading to a bit rate for the encoded bit stream of 12.2&nbsp;kbit/s. The coding scheme is the so-called [[Algebraic Code Excited Linear Prediction]] Coder (ACELP). The encoder is fed with data consisting of samples with a resolution of 13 bits left justified in a 16-bit word. The three least significant bits are set to 0. The decoder outputs data in the same format.<ref name="gsm0660">[http://webapp.etsi.org/workprogram/Report_WorkItem.asp?WKI_ID=10153 ETSI EN 300 726 V.8.0.1 (2000-11) - (GSM 06.60 version 8.0.1 Release 1999)], Retrieved on 2009-07-08</ref>

The Enhanced Full Rate (GSM 06.60) technical specification describes the detailed mapping between input blocks of 160 speech samples in 13-bit uniform [[Pulse-code modulation|PCM]] format to encoded blocks of 244 bits and from encoded blocks of 244 bits to output blocks of 160 reconstructed speech samples. It also specifies the conversion between [[A-law]] or [[μ-law]] (PCS 1900) 8-bit PCM and 13-bit uniform PCM. This part of specification also describes the codec down to the bit level, thus enabling the verification of compliance to the part to a high degree of confidence by use of a set of digital test sequences. These test sequences are described in GSM 06.54 and are available on disks.<ref name="gsm0660" />

This standard is defined in [[ETSI]] ETS 300 726 (GSM 06.60). The packing is specified in ETSI Technical Specification TS 101 318.<ref name="rfc3551">[http://tools.ietf.org/html/rfc3551#page-27 RFC 3551 - GSM-EFR (GSM 06.60)], Retrieved on 2009-07-08</ref>
ETSI has selected the Enhanced Full Rate voice codec as the industry standard codec for GSM/DCS in 1995. Enhanced Full Rate was also chosen as the industry standard in US market for PCS 1900 [[GSM frequency bands|GSM frequency band]].<ref name="archive-nokia" /><ref name="jutta">{{cite web |author=Jutta Degener |url=http://www.quut.com/gsm/#half |title=Half-rate GSM and EFR |year=1995 |access-date=2009-09-20}}</ref>