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Personal Digital Cellular
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===PDC-HR=== '''PDC Half Rate''' is a [[Speech encoding|speech coding]] standard that was developed by [[ARIB]] in [[Japan]] and used in PDC mobile networks in Japan. It operates with a bit-rate of 3.45 kbit/s and is based on Pitch Synchronous Innovation [[CELP]] (PSI-CELP).<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] 5.2 Half-rate speech CODEC</ref>
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