PDC-EFR
Encyclopedia
PDC Enhanced Full Rate is a speech coding
standard
that was developed by ARIB
in Japan
and used in PDC
mobile networks in Japan. It operatates with a bit-rate of 6.7 kbit/s and is based on VSELP
.
The PDC-EFR is compatible with the AMR mode AMR_6.70.
Speech encoding
Speech coding is the application of data compression of digital audio signals containing speech. Speech coding uses speech-specific parameter estimation using audio signal processing techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting...
standard
that was developed by ARIB
Arib
Arib is a town in northern Algeria....
in Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
and used in PDC
Personal Digital Cellular
Personal Digital Cellular is a 2G mobile telecommunications standard developed and used exclusively in Japan.After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and is slowly being phased out in favor of 3G technologies like W-CDMA and CDMA2000...
mobile networks in Japan. It operatates with a bit-rate of 6.7 kbit/s and is based on VSELP
Vector Sum Excited Linear Prediction
Vector sum excited linear prediction is a speech coding method used in several cellular standards. The VSELP algorithm is an analysis-by-synthesis coding technique and belongs to the class of speech coding algorithms known as CELP .Variations of this codec have been used in several 2G cellular...
.
The PDC-EFR is compatible with the AMR mode AMR_6.70.
See also
- AMR
- PDCPersonal Digital CellularPersonal Digital Cellular is a 2G mobile telecommunications standard developed and used exclusively in Japan.After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and is slowly being phased out in favor of 3G technologies like W-CDMA and CDMA2000...
- PDC-HRPDC-HRPDC Half Rate is a speech coding standardthat was developed by ARIB in Japan and used in PDC mobile networks in Japan. It operatates with a bit-rate of 3.45 kbit/s and is based on Pitch Synchronous Innovation CELP.-See also:* AMR* PDC* PDC-EFR...