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VQInsider

The Spirent VQInsider quantifies and measures the user experience for Voice and Video communications based on objective and subjective parameters. VQInsider is powered by Spirent's advanced techniques and guarantees that applications maintain the highest correlation with the Voice and Video Quality user experience. It allows service providers, enterprises, and system integrators to analyze video and find the reasons for insufficient video quality and an indication of the problem source (i.e. network or application).

With voice and video services, there are many more variables than with pure voice service. Bandwidth, frame rate, codecs, video size, synchronization, and more are all factors that can affect quality. And when high definition video is factored in, the complexity is increased another degree. Part of this is because video is still relatively new, but it is also a result of the sophistication of video services. Despite the knowledge gained from the voice market, significant work went into designing VQinsider as an aid to ensuring video quality.

Low network performance reduces the Mean Opinion Score (MOS) by introducing video artifacts, such as blurriness and blockiness. The artifact types and their severity depend on video coding parameters, such as codec type and resolution. At the end of the day, it is the user who will experience the product. Research has shown that the reliability of video quality software can only be truly accurate when correlated with a MOS obtained from tests conducted on users in the field. VQInsider software, highly correlated to human perception, is reliable. Spirent's VQinsider application offers audio metrics such as timestamp, passive and offline measurement, cause analysis, audio and video quality improvement and optimization tips, playback, a frame-based analysis of the voice and video end-user experience and the types of audio and video analysis described in the sections below.

Video quality measurement complexity is a function of the plethora of parameters that must be taken into consideration, including:
Network parameters-(packet loss, jitter, latency, and so on)
Codec type and implementation
Compression parameters
Real-time analysis
High Definition
Video content (image complexity, motion level, and so on)


The main features of VQInsider are:
Audio & Video Quality Measurement
Cause Analysis and Improvement Suggestions
Audio and Video Playback, Video Zoom
Generic Reports
XML Remote API
Reports

Audio & Video Quality Measurement:

The VQInsider provides passive, offline analysis for media applications; frame-based user experience video metrics that enable a per-frame analysis of video calls for detailed examination.
Video streams can be viewed frame by frame or complete with synchronized audio. Video quality diagnostics and troubleshooting employ either Wireshark capture files or 3GP file formats.

Video Codec:

H.263, H.263+, H.264, Mpeg4, 3GP, MP4

Video Profile:

QCIF, CIF, VGA, 4CIF, 16CIF, 480p, 720p, 1080p

H.264 Packetization:

NAL-Unit, STAP-A, FU-A

Audio Codec:

G.711, G.722.1, G.723.1, G729, G728, AAC, AMR, G.722, G726, AMR-WB

Audio & Video KPI:

Video MOS, Network KPI, Profile, frame rate, Intra-Partial frame, Image
Complexity, Compression, Audio MOS, Packet Size, Bandwidth, Packet Loss, Duplicate packets, frame rate, Jitter, etc.

Audio and Video MOS

is typically used to evaluate voice and video quality in multimedia, especially when codecs are used to compress the bandwidth. MOS is the arithmetic mean of all individual scores ranging from 1 (bad) to 5 (excellent). Separate MOS values are used to evaluate voice and video quality.
This method used in VQInsider is based on objective and subjective parameters measurement technologies, taking the compression level and network element into consideration. VQInsider supports multiple audio codecs and video codecs: H.263, H.263+, H.264, MPEG4, SD, HD

XML Remote API:

VQInsider is designed to be controlled directly by the user. However, it can also be controlled by a third-party application. This can be done through the command line interface or by employing the TCP/XML API and XML commands. When controlled by the third party application, the third-party (rather than the user) instructs the application to execute requested operations. Thus, the VQInsider can perform fully automated testing without user intervention. This automation reduces the need for user intervention, which in turn results in reduced timeto- market.

Reports

VQInsider allows you to build reports according to your specific requirements and export them. The results can be viewed in either summary or detailed format. The Report Builder offers various built-in templates as a basis for your custom-made Test Results Report, which can be viewed as a graph or table. You can zoom into a section of the graph that you want to examine, and export the report to JPEG, PDF, Excel or XML formats.

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