Voice & Video Analysis
About Voice & Video analysis
Voice and video over IP signaling and media is available for capture analysis. Voice over IP and Video over IP refer to protocol suites used to set up and maintain two way voice or video communications over the Internet. Voice and video protocol suites include those relating to SIP, SCCP, RTSP, H.323, Avaya, etc. The unit of communication is the call and an individual call may be carried in multiple channels, some dedicated to signaling and others to carrying the encoded voice data. The encoded data is referred to as media, and a call containing such data has media channels. Media channels contain RTP (Real-time Transport Protocol) or RTCP (RTP Control Protocol) data. The conversion of voice data into digital form and back again is accomplished using a particular codec (coder/decoder), specified in the RTP header.
The Voice & Video views in capture windows provide simultaneous analysis of voice and video traffic with subjective and objective quality metrics. The Calls view displays one row for each call in a capture and the Media view displays one row for each RTP media flow in a call.
NOTE: Omnipeek voice and video analysis derives its call quality metrics from industry-standard Telchemy technology.
TIP: To do reliable analysis on VoIP calls, it is best to have the entire set of packets for the calls. For this reason, use filters to capture only VoIP traffic. See Making a voice or video filter.
The Voice & Video Flow Visualizer displays signal bounce diagrams of the signaling and RTP/RTCP packets of an entire call in a single window. See Voice & Video Flow Visualizer.