IS-641
From HandWiki
TIA/EIA standard IS-641 is a speech coding standard released in 1996[1] and used in some computer and telecommunications networks in the United States. The main usage was in the U.S. TDMA networks defined by IS-136.[2][3] The bit rate of the speech codec is 7.4 kbit/s.[1] This codec is the same as the 7.4 kbit/s mode in the AMR speech codec. The standard was superseded{{Citation needed|date=July 2025} 1999.[4]
References
- ↑ 1.0 1.1 "TIA TIA/EIA/IS-641-A TDMA Cellular/PCS - Radio Interface Enhanced Full-Rate Voice Codec". https://store.accuristech.com/standards/tia-tia-eia-is-641-a?product_id=2592934. "This document gives a description of the Nokia/JSH speech and channel codec for the TIA IS-641 Enhanced Full Rate Codec. The codec consists of a 7.4 kbit/s ACELP speech codec and a 5.6 kbit/s channel codec (Forward Error Correction)."
- ↑ ITU-T Recommendation G.108: Application of the E-model: A planning guide (Technical report). September 1999. p. 4. Archived (PDF) from the original on 30 April 2024.
- ↑ Garg, Vijay K. (2001). "Evolution of TDMA-Based 2G Systems to 3G Systems" (in en). Wireless Network Evolution: 2G to 3G (1st ed.). Prentice Hall. pp. 343. ISBN 9780130280770. https://docs.rs-online.com/fc47/0900766b8010bae9.pdf.
- ↑ "TIA ANSI/TIA/EIA-136-410 TDMA Celular/PCS Radio Interface Enhanced Full-Rate Voice Codec". https://store.accuristech.com/standards/tia-ansi-tia-eia-136-410?product_id=2592751.
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