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by ITU-T is of significant importance since for the first time the same codec is adopted for wireless as well as wireline services. AMR-WB uses an extended audio bandwidth from 50 Hz to 7 kHz and gives superior speech quality and voice naturalness compared to existing second-and third-generation mobile communication systems. The wideband speech service(More)
European Telecommunication Standards Institute (ETSI) initiated a standardisation program in October 1997 to develop an Adaptive Multi-Rate (AMR) codec for GSM. After two competitive selection phases, ETSI chose in October 1998 a codec developed in collaboration between Ericsson, Nokia, and Siemens. The codec standard was finalised, characterised, and(More)
Introduction of LTE (Long Term Evolution) brings enhanced quality for 3GPP multimedia services. The high throughput and low latency of LTE enable higher quality media coding than what is possible in UMTS. LTE-specific codecs have not yet been defined but work on them is ongoing in 3GPP. The LTE codecs are expected to improve the basic signal quality, but(More)
The 3rd Generation Partnership Project (3GPP) is developing and standardizing a wide range of advanced mobile multimedia services along with their radio access and network technologies. 3GPP targets to match or exceed the user experience of the personal computer (PC)-based services over the Internet, while at the same time facilitating unlimited receiver(More)
This paper describes a multi-rate codec family developed as a potential candidate for the GSM Adaptive Multi Rate (AMR) codec standard. The codec family consists of the GSM Enhanced Full Rate (EFR) codec [I] and lower bit-rate extensions thereof: The codec family consists of several codecs, i.e., modes that have different bit-rate partitionings between(More)