GSM$500567$ - translation to Αγγλικά
Display virtual keyboard interface

GSM$500567$ - translation to Αγγλικά

SPEECH CODING STANDARD
GSM 06.20; GSM-HR

GSM      
GSM, Global System for Mobile Communications, neuer Standard zur Kommunikation mit zellulare Telefone
Global System for Mobile Communications         
STANDARD TO DESCRIBE PROTOCOLS FOR SECOND GENERATION DIGITAL CELLULAR NETWORKS USED BY MOBILE PHONES
Global system for mobile communications; Mobile phone base station; Gsm; Extended Global System; Extended Global System for Mobile Communications; Global system for mobile cellular communications; History of GSM; Groupe Spécial Mobile; Global System for Mobile Communications; Global System for Mobile Communication; Global System for Mobile communications; Digital Communications System; SGSM; GSM network; Groupe Special Mobile; GSM 07.07; GSM Gateway; Global System For Mobile Communications; GSM phone system; Global System for Mobile; GEA/1; GEA-1; GEA-2; GEA/2; Global System for Mobile (GSM) Communications
Globales System für mobile Kommunikation, GSM, digital-zelluläres Kommunikationssystem in vielen Ländern in Gebrauch
Home Location Register         
COMPONENT OF THE GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS (GSM)
Network and Switching Subsystem; Authentication Center; Home Location Register; Visitor Location Register; GMSC; Visitors Location Register; Qualdir; Mobile Switching Centre; GSM core network; Mobile Switching Center; Switching and Management Subsystem; Network Switching Subsystem; Mobile switching centre; Mobile switching center; Home location register; Visitor location register; Visitor Location Registers
Home Location Register, HLR, Heimatregister einer Mobilfunknummer das die Daten die Nummer betreffend beinhaltet

Ορισμός

Global System for Mobile Communications
<communications> (GSM, originally "Groupe de travail Sp?ciale pour les services Mobiles") One of the major standards for digital cellular communications, in use in over 60 countries and serving over one billion subscribers. The GSM standard is currently used in the 900 MHz, 1800 MHz and 1900 MHz bands. GPRS allows circuit switched data communications over GSM, and is widely used for World Wide Web and electronic mail access from cellular devices. GSM World (http://gsmworld.com/). (2005-01-26)

Βικιπαίδεια

Half Rate

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 half the bandwidth of the Full Rate codec, network capacity for voice traffic is doubled, at the expense of audio quality. The sampling rate is 8 kHz with resolution 13 bit, frame length 160 samples (20 ms) and subframe length 40 samples (5 ms).

GSM Half Rate is specified in ETSI EN 300 969 (GSM 06.20), and uses a form of the VSELP algorithm. Previous specification was in ETSI ETS 300 581–2, which first edition was published in December 1995.

For some Nokia phones one can configure the use of this codec:

  • To activate HR codec use enter the following code: *4720#
  • To deactivate HR codec use enter the following code: #4720#