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Extended Adaptive Multi-Rate – Wideband (AMR-WB+) is an audio codec that extends AMR-WB. It adds support for stereo signals and higher sampling rates. Another main improvement is the use of transform coding (transform coded excitation – TCX) additionally to ACELP. This greatly improves the generic audio coding. Automatic switching between transform coding and ACELP provides both good speech and audio quality with moderate bit rates. File storage of AMR-WB+ encoded audio is specified within the 3GP container format, 3GPP-defined ISO-based multimedia file format defined in 3GPP TS 26.244.

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  • Extended Adaptive Multi-Rate – Wideband (en)
  • AMR-WB+ (ja)
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  • AMR-WB+ あるいは Extended Adaptive Multi-Rate Wideband は、AMR-WB を拡張しより広帯域化した音声符号化方式である。AMR-WB の持つ全てのモードを含み、さらに音楽を含む一般的な広帯域のオーディオ信号を符号化できるよう拡張されている。モノラル/ステレオの両方をサポートし、モノラルでは 5.2 ～ 36 kbps 、ステレオでは 6.2 ～ 48 kbpsのビットレートで符号化ができる。 AMR-WB+ は 3GPP で定義された携帯電話向けの各種マルチメディアサービスやデジタルビデオブロードキャスティングで使用することができる。 (ja)
  • Extended Adaptive Multi-Rate – Wideband (AMR-WB+) is an audio codec that extends AMR-WB. It adds support for stereo signals and higher sampling rates. Another main improvement is the use of transform coding (transform coded excitation – TCX) additionally to ACELP. This greatly improves the generic audio coding. Automatic switching between transform coding and ACELP provides both good speech and audio quality with moderate bit rates. File storage of AMR-WB+ encoded audio is specified within the 3GP container format, 3GPP-defined ISO-based multimedia file format defined in 3GPP TS 26.244. (en)
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  • Extended Adaptive Multi-Rate – Wideband (en)
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  • Audio (en)
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  • audio/amr-wb+, audio/3gpp (en)
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  • Extended Adaptive Multi-Rate – Wideband (AMR-WB+) is an audio codec that extends AMR-WB. It adds support for stereo signals and higher sampling rates. Another main improvement is the use of transform coding (transform coded excitation – TCX) additionally to ACELP. This greatly improves the generic audio coding. Automatic switching between transform coding and ACELP provides both good speech and audio quality with moderate bit rates. As AMR-WB operates at internal sampling rate 12.8 kHz, AMR-WB+ also supports various internal sampling frequencies ranges from 12.8 kHz to 38.4 kHz. AMR-WB uses 16 kHz sampling frequency with a resolution of 14 bits left justified in a 16-bit word. AMR-WB+ uses 16/24/32/48 kHz sampling frequencies with a resolution of 16 bits in a 16-bit word. 3GPP originally developed the AMR-WB+ audio codec for streaming and messaging services in Global System for Mobile communications (GSM) and Third Generation (3G) cellular systems.Its primary target applications are Packet-Switched Streaming service, Multimedia Messaging Service (MMS) and Multimedia Broadcast and Multicast Service (MBMS). File storage of AMR-WB+ encoded audio is specified within the 3GP container format, 3GPP-defined ISO-based multimedia file format defined in 3GPP TS 26.244. The AMR-WB+ codec has a wide bit-rate range, from 5.2 to 48 kbit/s. Mono rates are scalable from 5.2 to 36 kbit/s, and stereo rates are scalable from 6.2 to 48 kbit/s, reproducing bandwidth up to 20 kHz (approaching CD quality). Moreover, it provides backward compatibility with AMR wideband. (en)
  • AMR-WB+ あるいは Extended Adaptive Multi-Rate Wideband は、AMR-WB を拡張しより広帯域化した音声符号化方式である。AMR-WB の持つ全てのモードを含み、さらに音楽を含む一般的な広帯域のオーディオ信号を符号化できるよう拡張されている。モノラル/ステレオの両方をサポートし、モノラルでは 5.2 ～ 36 kbps 、ステレオでは 6.2 ～ 48 kbpsのビットレートで符号化ができる。 AMR-WB+ は 3GPP で定義された携帯電話向けの各種マルチメディアサービスやデジタルビデオブロードキャスティングで使用することができる。 (ja)
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