Editing Personal Digital Cellular (section)

===PDC-EFR===
'''PDC Enhanced Full Rate''' is a [[Speech encoding|speech coding]] standard that was developed by [[ARIB]] in [[Japan]] and used in PDC mobile networks in Japan. The carriers use one of those codecs as PDC-EFR: [[CS-ACELP]] 8&nbsp;kbit/s (a.k.a. [[NTT DoCoMo]] Hypertalk) and [[ACELP]] 6.7&nbsp;kbit/s (a.k.a. [[SoftBank Mobile|J-PHONE]] Crystal Voice).<ref>[http://www.arib.or.jp/english/html/overview/doc/5-STD-27_L-2p3-E.pdf ARIB RCR STD-27L, Personal Digital Cellular Telecommunication System RCR Standard] "5.3  CS-ACELP speech CODEC" and "5.4  ACELP Speech CODEC"</ref><ref>[http://www.ieice-hbkb.org/files/02/02gun_08hen_03.pdf IEICE Knowledge-Base Category 2. Part 8. Chapter 3. The encoding methods for mobiles] [[Institute of Electronics, Information and Communication Engineers|IEICE]]</ref>

The PDC-EFR CS-ACELP uses [[G.729]]. The PDC-EFR ACELP is compatible with the [[Adaptive multi-rate compression|AMR]] mode AMR_6.70.