宽带语音（Wideband Audio），又称高品质语音（HD Voice），是一种在移动电话上提供高品质语音通话的技术。一般的人声带宽约为 80 Hz 至 14 kHz，但一般语音电话的带宽原只有 300 Hz 至 3.4 KHz，高品质语音采用了 AMR-WB（Adaptive Multi Rate-Wideband）或称 W-AMR（Wideband-Adaptive Multi Rate）技术，把语音电话支持的带宽提升到 50 Hz 至 7 kHz 或更高，并可优化通信品质，减轻环境噪音的影响，使手机间的通话品质更加清晰。

Wideband audio, also known as HD voice, is high definition voice quality for telephony audio, contrasted with standard digital telephony "toll quality". It extends the frequency range of audio signals transmitted over telephone lines, resulting in higher quality speech. The range of the human voice extends from 80 Hz to 14 kHz but traditional, voiceband or narrowband telephone calls limit audio frequencies to the range of 300 Hz to 3.4 kHz. Wideband audio relaxes the bandwidth limitation and transmits in the audio frequency range of 50 Hz to 7 kHz or higher.