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Details of 'DTS/TSGS-0426090U' Work Item
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  DTS/TSGS-0426090U TS 126 090   3GPP SA 4
  Current Status
(Click to View Full Schedule)
Cover Date Standstill Creation Date
  Publication (2000-02-01) 3.1.0 2000-01-28   1999-05-27
  Rapporteur Technical Officer Harmonized Standard
  Erik Ekudden Paolino Usai No
Title Universal Mobile Telecommunications System (UMTS); Mandatory Speech Codec speech processing functions AMR Speech Codec - Transcoding functions (3G TS 26.090 version 3.1.0 Release 1999)
Scope and Field
of Application
This Telecommunication Standard (TS) describes the detailed mapping from input blocks of 160 speech samples in 13-bit uniform PCM format to encoded blocks of 95, 103, 118, 134, 148, 159, 204, and 244 bits and from encoded blocks of 95, 103, 118, 134, 148, 159, 204, and 244 bits to output blocks of 160 reconstructed speech samples. The sampling rate is 8 000 samples/s leading to a bit rate for the encoded bit stream of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2 or 12.2 kbit/s. The coding scheme for the multi-rate coding modes is the so-called Algebraic Code Excited Linear Prediction Coder, hereafter referred to as ACELP. The multi-rate ACELP coder is referred to as MR-ACELP.
In the case of discrepancy between the requirements described in this TS and the fixed point computational description (ANSI-C code) of these requirements contained in [4], the description in [4] will prevail. The ANSI-C code is not described in this TS, see [4] for a description of the ANSI-C code.
The transcoding procedure specified in this TS is mandatory for systems using the AMR speech codec.
Not Available


Keywords Projects Clusters Frequencies Mandates Directives
Content delivery
Wireless Systems
Official Journal
2001-04-19 forina WI Revision. 1 WI created with Ref: RTS/TSGS-0426090Uv4. Comments copied = No, Schedule copied = Default

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