Variable-Rate Multimode Wideband ( VMR-WB ) is a source-controlled variable-rate multimode codec designed for robust encoding/decoding of wideband/narrowband speech. The operation of VMR-WB is controlled by speech signal characteristics (i.e., source-controlled) and by traffic condition of the network (i.e., network-controlled mode switching). Depending on the traffic conditions and the desired quality of service ( QoS ), one of the 4 operational modes is used. All operating modes of the existing VMR-WB standard are fully compliant with cdma2000 rate-set II. VMR-WB modes 0, 1, and 2 are cdma2000 native modes with mode 0 providing the highest quality and mode 2 the lowest ADR. VMR-WB mode 3 is the AMR-WB interoperable mode operating at an ADR slightly higher than mode 0 and providing a quality equal or better than that of AMR-WB at 12.65 kbit/s when in an interoperable interconnection with AMR-WB at 12.65 kbit/s.
5-438: Now also a cdma2000 rate-set I compliant mode is implemented to the coder as mode 4. The average bitrate of the mode is 6.1 kbit/s (maximum is 8.55 kbit/s). Source coding bitrates are: Rate-Set I - 8.55, 4.0, 2.0, 0.8 kbit/s, Rate-Set II - 13.3, 6.2, 2.7, 1.0 kbit/s. VMR-WB uses 16 kHz sampling frequency. Algorithmic delay is 33.75ms. VMR-WB can be also used in 3GPP2 container file format - 3G2 . VMR-WB
10-664: The competing 3G standard CDMA2000 that is the 3G upgrade to cdmaOne networks that was used mostly in the United States (and to some extent also in Japan, China, Canada, South Korea and India). GSM/UMTS were the most widespread 2G/3G wireless standards worldwide. Most countries used only the GSM family. A few countries, including China, the United States, Canada, Ukraine, Trinidad and Tobago , India, South Korea and Japan, used both standards. 3GPP2 had its last activity in 2013, and
15-522: Was a 3GPP2 project to develop a fourth-generation successor to CDMA2000. In November 2008, Qualcomm , UMB's lead sponsor, announced it was ending development of the technology, favoring LTE instead. 3GPP2 should not be confused with 3GPP ; 3GPP is the standard body behind the Universal Mobile Telecommunications System (UMTS) that is the 3G upgrade to GSM networks , while 3GPP2 was the standard body behind
20-497: Was designed by Nokia and VoiceAge. It is based on AMR-WB. This sound technology article is a stub . You can help Misplaced Pages by expanding it . 3GPP2 The 3rd Generation Partnership Project 2 ( 3GPP2 ) was a collaboration between telecommunications associations to make a globally applicable third generation ( 3G ) mobile phone system specification within the scope of the ITU 's IMT-2000 project. In practice, 3GPP2
25-488: Was the standardization group for CDMA2000 , the set of 3G standards based on the earlier cdmaOne 2G CDMA technology. The participating associations were ARIB/TTC (Japan), China Communications Standards Association , Telecommunications Industry Association (North America) and Telecommunications Technology Association (South Korea). The agreement was established in December 1998. Ultra Mobile Broadband (UMB)
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