VOIP语音测试
VoIP(Voice over Internet Protocol)為網絡電話(又叫寬帶電話)。VoIP和傳統電話最大的不同在于語音的傳輸方式,VoIP不是通過電信運營商的傳統電話網絡進行傳輸,而是將語音(Voice)模擬信號進行數字化,將數據通過數據封包(Data Packet)的形式在IP互聯網絡(IP Network)上進行實時傳輸。
VoIP相對傳統電話來說比較便宜甚至是免費的,而且還能夠提供長時間在線的語音通話,廣泛應用于國內外的長途電話中,網絡通信前景廣闊。但是由于VoIP通信是基于網絡,受網絡狀態影響比較大,存在數據掉包、延遲等現象,清晰度與傳統的固話有差距,通話語音質量差等缺點。為了提高VoIP的語音通話質量,睿輝聲學實驗室(VoiceX)可提供符合測試標準的環境和全套測試設備,為客戶提供科學詳細的測試數據,不斷地在測試調試中得到更好的語音通話質量。
測試框圖
被測樣品DUT通過MFE IX或者路由器wifi注冊到SIP Server, MFE VIII.1、MFE VI.1提供網絡連接和模擬各種網絡狀態。DUT與內置仿真嘴和仿真耳的仿真人頭進行語音交互,仿真人和MFE VI.1連接發送/接收語音信號。安裝有測試系統的PC通過USB線分別連接MFE VIII.1、MFE VI.1和MFE IX,統一控制/分析發送/接收信號。
測試設備與環境
睿輝聲學實驗室(VoiceX)具有符合測試標準的全套測試設備和專業的測試工程師,能夠為客戶提供全面的測試方案和詳細的咨詢服務。
相關測試標準
–EIA/TIA-810
Telecommunications Telephone Terminal Equipment Transmission Requirements for Narrowband Digital Telephones, (North America), Digital & VoIP Terminals
–TIA-920
Digital Interface Communications Devices with Handsets
–ITU-T G.168,
SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS International telephone connections and circuits – Apparatus associated with long distance telephone circuits; Digital network echo canceller
–FZ TSEC
Technical Specification EC Deutsche Telekom AG, Network Speech Echo Cancellers
–FZ TSEC-L
Technical Specification EC Deutsche Telekom AG, Network Speech Echo Cancellers incl. Limits
–ETSI ES 202 737 / ES 202 738,
Speech and multimedia Transmission Quality (STQ);
Transmission requirements for narrowband VoIP terminals (handset and headset + loud speaking and handsfree ) from a QoS perspective as perceived by the user; Narrowband IP Phones
–ETSI ES 202 739 / ES 202 740,
Speech and multimedia Transmission Quality (STQ);
Transmission requirements for wideband VoIP terminals (handset and headset + loud speaking and handsfree terminals) from a QoS perspective as perceived by the user; Wideband IP Phones
–TS 102 924/925
Speech and multimedia Transmission Quality (STQ);
Transmission requirements for Super-Wideband / Full band handset and headset / handsfree and conferencing terminals from a QoS perspective as perceived by the user
總結
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