AMR-WB+

AMR-WB+

Adaptive Multi Rate – WideBand plus (AMR-WB+) is an audio codec that extends AMR-WB. It adds support for stereo signals and higher sampling rates. Another main improvement is the use of transform coding additionally to ACELP. This greatly improves the generic audio coding. Automatic switching between transform coding and ACELP provides both good speech and audio quality with moderate bit rates.

As AMR-WB operates at internal sampling rate 12.8 kHz, AMR-WB+ also supports various internal sampling frequencies ranges from 12.8 kHz to 38.4 kHz.

3GPP originally developed the AMR-WB+ audio codec for streaming and messaging services in Global System for Mobile communications (GSM) and Third Generation (3G) cellular systems.Its primary target applications are Packet-Switched Streaming service (PSS), Multimedia Messaging Service (MMS) and Multimedia Broadcast and Multicast Service (MBMS).

The AMR-WB+ codec has a wide bit-rate range, from 5.2–48 kbit/s. Mono rates are scalable from 5.2–36 kbit/s, and stereo rates are scalable from 6.2–48 kbit/s, reproducing bandwidth up to 20 kHz (approaching CD quality). Moreover, it provides backward compatibility with AMR wideband.

See also

* Adaptive Multi-Rate
* AMR-WB


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • AMR 35 — Eine Gruppe von AMR 35 mit 13,2 mm Maschinengewehr Allgemeine Eigenschaften …   Deutsch Wikipedia

  • AMR — or AMR may refer to:Companies* AMR Corporation, parent company of American Airlines * American Medical Response, a private ambulance operator * Arcata and Mad River Railroad, from its AAR reporting mark * AMR Research, a research company focused… …   Wikipedia

  • AMR — AMR, Amr: Персоналии: Аббад I (Abbad I Ibn Muhammed abu Amr  Аббад I Ибн Мухаммед Абу Амр)  умерший в 1042 году мавританский король. Компьютерная техника: AMR (сжатие звука) (adaptive multi rate)  схема сжатия звука,… …   Википедия

  • ‘AMR — Mot arabe qui, venant du verbe amara («commander», «ordonner»), désigne l’impératif en grammaire et le commandement divin dans le Coran et la théologie. Le ‘amr est donc en relation avec la volonté de Dieu, tantôt avec la volonté législatrice (ir …   Encyclopédie Universelle

  • amr — ● amr nom masculin (mot arabe, de amara, commander) Commandement divin contenu dans le Coran, et auquel se soumet le croyant. Amr (ibn il As) ( Amr ibn al âs) (v. 580 v. 663 664) membre de la tribu des Qurayshites, compagnon de Mahomet, converti… …   Encyclopédie Universelle

  • AMR —   [Abk. für Anisotrope Magnetoresistive, dt. »anisotrop magnetoresistiv(er Effekt)«], Prozess, in dessen Verlauf elektrische Leiter ihren Widerstand durch Magnetisierung ändern. Die Größe des Widerstands verändert sich dabei mit der… …   Universal-Lexikon

  • AMR — puede referirse a: Audio/modem riser, ranura de expansión de placas madres. Compresión multi tasa adaptativa (del inglés adaptive multi rate). Automatic meter reading, sistemas para la lectura remota de medidores o contadores). Antimicrobial… …   Wikipedia Español

  • AMR — (annual monitoring report) A report submitted to central government by a local planning authority or a regional planning authority assessing the progress and effectiveness of the local development framework or regional spatial strategy (Regional… …   Law dictionary

  • AMR 33 — Infobox Weapon name=Renault AMR 33 caption=the AMR 33 at Musée des Blindés origin=FRA type=Light tank is vehicle=yes service= used by=France, Nazi Germany wars= designer= design date= manufacturer= unit cost= production date= 1933 1935 number=… …   Wikipedia

  • AMR 35 — Infobox Weapon name=Renault AMR 35 caption= type=Light tank origin=FRA is vehicle=yes service= used by=flagicon|France France, flagicon|Germany|Nazi Nazi Germany, flagicon|Republic of China China wars= World War II designer= design date=… …   Wikipedia

  • AMR 33 — У этого термина существуют и другие значения, см. AMR …   Википедия

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”