Artificial Intelligence Programming Lab(AIPLab) 討論區

Please login or register.

請輸入帳號, 密碼以及預計登入時間


[開學]106學年第1學期的課程看版開張了 歡迎同學問問題-20170917

作者 主題: [標準] Internet Low Bitrate Codec (iLBC)  (閱讀 2019 次)


  • 管理員
  • Hero Member
  • *****
  • 文章: 1838
    • 檢視個人資料
[標準] Internet Low Bitrate Codec (iLBC)
« 於: 一月 31, 2016, 10:42:39 pm »
Sampling frequency 8 kHz/16 bit (160 samples for 20 ms frames, 240 samples for 30 ms frames)
Controlled response to packet loss, delay and jitter
Fixed bitrate (15.2 kbit/s for 20 ms frames, 13.33 kbit/s for 30 ms frames)
Fixed frame size (304 bits per block for 20 ms frames, 400 bits per block for 30 ms frames)
Robustness similar to pulse code modulation (PCM) with packet loss concealment, like the ITU-T G.711
CPU load similar to G.729A, with higher basic quality and better response to packet loss
Since 2011 it is available under an open source (3-clause BSD license) license as a part of the open source WebRTC project.[5] (previously commercial use of the source code supplied by GIPS required a licence[10])
PSQM testing under ideal conditions yields mean opinion scores of 4.14 for iLBC (15.2 kbit/s), compared to 4.3 for G.711 (µ-law)

SimplePortal Classic 2.0.5