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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 quite poor quality of GSM-Full Rate ( FR ) codec.
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Enhanced and Full
Although the Enhanced Full Rate helps to improve call quality, this codec have higher computational complexity, which in a mobile device can potentially result in increase of energy consumption as high as 5 % compared to ' old ' FR codec.
In 1995, ETSI has selected the Enhanced Full Rate voice codec as the industry standard codec for GSM / DCS.
The Enhanced Full Rate ( GSM 06. 60 ) technical specification describes the detailed mapping between input blocks of 160 speech samples in 13-bit uniform PCM format to encoded blocks of 244 bits and from encoded blocks of 244 bits to output blocks of 160 reconstructed speech samples.
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 band.
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.
Enhanced and Rate
The term Enhanced Data Rate ( EDR ) is used to describe π / 4-DPSK and 8DPSK schemes, each giving 2 and 3 Mbit / s respectively.
* RFC 3558-RTP Payload Format for Enhanced Variable Rate Codecs ( EVRC ) and Selectable Mode Vocoders ( SMV )
Enhanced and EFR
The speech codecs used in GSM are called Half-Rate ( HR ), Full-Rate ( FR ), Enhanced Full-Rate ( EFR ) and Adaptive Multirate ( AMR ).
Enhanced and GSM
Enhanced Data rates for GSM Evolution ( EDGE ) ( also known as Enhanced GPRS ( EGPRS ), or IMT Single Carrier ( IMT-SC ), or Enhanced Data rates for Global Evolution ) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM.
This was expanded over time to include data communications, first by circuit switched transport, then packet data transport via GPRS ( General Packet Radio Services ) and EDGE ( Enhanced Data rates for GSM Evolution or EGPRS ).
This is largely due to the introduction of GPRS ( General Packet Radio Service ) and EDGE Enhanced Data Rates for GSM Evolution connectivity by the GSM operators.
TDMA is used in the digital 2G cellular systems such as Global System for Mobile Communications ( GSM ), IS-136, Personal Digital Cellular ( PDC ) and iDEN, and in the Digital Enhanced Cordless Telecommunications ( DECT ) standard for portable phones.
These are available in Code Division Multiple Access ( CDMA ), Digital Enhanced Cordless Telecommunications – DECT ( TDMA / DCA ) ( See ETSI 6 EN 300 765-1 V1. 3. 1 ( 2001-04 ) -" Digital Enhanced Cordless Telecommunications ( DECT ); Radio in the Local Loop ( RLL ) Access Profile ( RAP ); Part 1: Basic telephony services "), Global System for Mobile Communications ( GSM ), IS136 Time Division Multiple Access ( TDMA ) as well as analog access technologies such as Advanced Mobile Phone System ( AMPS ), for which there will be independent standards defining every aspect of modulation, protocols, error handling, etc.
Enhanced Data rates for GSM Evolution ( EDGE ), Enhanced GPRS ( EGPRS ), or IMT Single Carrier ( IMT-SC ) is a backward-compatible digital mobile phone technology that allows improved data transmission rates, as an extension on top of standard GSM.
* the Global System for Mobile Communications ( GSM ) including GSM evolved radio access technologies ( e. g. General Packet Radio Service ( GPRS ) and Enhanced Data Rates for GSM Evolution ( EDGE ))
* Enhanced Data Rates for GSM Evolution ( EDGE ) ( E-GPRS ) and Universal Mobile Telecommunications System ( UMTS ) provide improved radio interfaces with higher data rates, while still being backward compatible with the GSM core network.
Enhanced and 06
* New Signs & Sounds 12 / 05-01 / 06 – ( CD Sampler, Enhanced ) 2005, Track # 6 " Gabriel ( Architect Remix )"-Zillo
Enhanced and .
OCS was eventually followed by the modestly improved Enhanced Chip Set ( ECS ) in 1990 and finally by the partly 32-bit Advanced Graphics Architecture ( AGA ) in 1992.
The US Army has adopted Interceptor body armour, which uses Enhanced Small Arms Protective Inserts ( E-S. A. P. I ) in the chest, sides and back of the armour.
; Enhanced external counterpulsation ( EECP ): Pneumatically assisting the heart move blood through cuffs on the legs.
It was originally developed to store and play back sound recordings only, but the format was later adapted for storage of data ( CD-ROM ), write-once audio and data storage ( CD-R ), rewritable media ( CD-RW ), Video Compact Discs ( VCD ), Super Video Compact Discs ( SVCD ), PhotoCD, PictureCD, CD-i, and Enhanced CD.
In 1984 IBM introduced the Enhanced Graphics Adapter which was capable of producing 16 colors and had a resolution of 640 by 350.
Digital Enhanced Cordless Telecommunications ( Digital European Cordless Telecommunications ), usually known by the acronym DECT, is a digital communication standard, which is primarily used for creating cordless phone systems.
The Enhanced Chip Set ( ECS ) is the second generation of the Amiga computer's chipset, offering minor improvements over the original chipset ( OCS ) design.
The IMF provided a one-year standby arrangement in 1994-1995 and a three-year Enhanced Financing Facility ( EFF ) at near commercial rates beginning in late 1995.
The country signed an Enhanced Structural Adjustment Facility ( ESAF ) -- later converted to a Poverty Reduction and Growth Facility ( PRGF ) with the International Monetary Fund in March 1999.
Before LG Enhanced IPS was introduced in 2009, the additional transistors resulted in blocking more transmission area, thus requiring a brighter backlight and consuming more power, making this type of display less desirable for notebook computers.
Enhanced electrotonic coupling by enhancing the effectiveness of direct gap junctions between neurons has also been suggested by several studies.
* Canadian nationals may enter the U. S. via land or sea using an " Enhanced " WHTI-compliant driver's license.
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