User manual OPTICOM IR-5755 DATASHEET

[. . . ] 11 7. 2 OEM LIBRARIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7. 3 INTEGRATED NETWORK MANAGEMENT SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 ABOUT OPTICOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Page 2 of 12 ADVANCED PERCEPTUAL EVALUATION OF VIDEO QUALITY 1 EXECUTIVE SUMMARY As with the new standards for global communications, like 3G/UMTS and WiMAX, new broadband mobile networks are becoming available, new services are added to the service provider's portfolio. Beside simple broadband data transmission services the providers offer more and more video and multimedia based services like . . . [. . . ] This is likely to spoil the revenue expectations for the value added by the video services on a large scale. However, all this is not unrealistically far-fetched, in particular when we keep in mind that customers expectations are well aligned from their daily television consume. Of course, mobile video transmission on every user's terminal represents an innovative advantage, still comparable to the introduction of mobile phones as such. Nevertheless, new technologies will not find acceptance if especially video information is not delivered in an acceptable quality. A bad video connection might severely disturb the speech link, even though the voice quality as such is excellent. These effects are known as audio-visual interaction and will be taken into account in the future design of perceptual measurements, too. As a matter of fact lossy coding techniques and noisy transmission channels may irreversibly destroy relevant parts of crucial information. A typical video coding technique using a simple blockmatching algorithm can already tremendously impair a video signal, as depicted in the following sequences below. Figure 3-1 shows a single frame taken from a typical video stream ­ in this case, the red Ferrari of Michael Schumacher leaves the track and rushes into the green. The video content is undistorted and it can be seen that the Ferrari does not seem to be broken at all. Schumacher is doing ok ­ a vital information for every formula one fan watching the scene on his mobile. Figure 3-1 Schumacher and the Ferrari are ok! Page 4 of 12 ADVANCED PERCEPTUAL EVALUATION OF VIDEO QUALITY In Figure 3-2 a single frame from the decoded signal was taken ­ same scenery and action as in Figure 3-1, but this time, it cannot be seen whether the car is damaged or not, because of blocking artefacts and quantization noise the details got lost. This process makes sure, that only Full reference measurement means that all information of the original, (not necessarily) undistorted video signal is required, thus it can be compared to the impaired video signal on a frame-by-frame basis. An alternative to this model would be the reduced reference model with which the reference signal is represented only by a few parameters instead of the complete video signal. 4 Intrusive measurements need a reference signal, which is compared to the impaired signal being the result of a certain device under test (DUT). As a consequence for the DUT this means that a test signal (reference) will have to be sent through the DUT thus being an intrusion to the device. Page 8 of 12 3 ADVANCED PERCEPTUAL EVALUATION OF VIDEO QUALITY those frames are compared to each other that also correspond to each other. It takes into account that variable temporal frame delays as well as shifts of the frame's content may have occurred due to the coding procedure. The second block calculates the perceptual difference of the aligned signals. But due to the early stage of the development, it is assumed that the prediction accuracy will continuously be improved. Page 9 of 12 ADVANCED PERCEPTUAL EVALUATION OF VIDEO QUALITY 6. 4 Performance of IR-5755 Currently IR-5755 is largely time consuming because of its very complex not optimized calculations. OPTICOM expects that within a very short time after this first release, the algorithm will be optimized to run at least in realtime on up-to-date PC systems. 6. 5 KPIs Obtained from IR-5755 The intention of this subchapter is to give a short overview of IR-5755's key performance indicators (KPIs). IR-5755's KPIs are a number of extra parameters beside the overall quality of the video stream, which are partly also available at the output of the algorithm. They allow for a detailed cause analysis, if the quality of the measured video sequence is not satisfactory. Note: In this first version of IR-5755 only a few KPIs are presented. suggestions on which parameters you are interested in or if you need further information towards this product please feel free to contact us info@opticom. de or visit our web site on www. opticom. de. 6. 5. 1 IR-5755 Score The IR-5755 Score is the most important result and specifies the video quality on a MOS scale. [. . . ] It is expected that the licensing model will be composed of per unit or per channel fees, thus offering a flexible and largely scalable usage. Today, an increasing number of 30+ well-known industry players, including the Who is who of the T&M manufacturers, are counted to our OEM licensees. 7. 3 Integrated Network Management Systems OPTICOM's licensing portfolio is completed with licensing models that are available for enterprise wide usage or company internal licensing. This will be a compelling approach to add IR-5755 to existing or newly deployed QoS management systems, even if you are not an equipment manufacturer. With its wide range of expertise, OPTICOM will also offer the services for integration and customer specific implementations. Page 11 of 12 ADVANCED PERCEPTUAL EVALUATION OF VIDEO QUALITY 8 ABOUT OPTICOM OPTICOM, the world leader in perceptual voice and audio quality testing solutions and the technologies provider of techniques such as PSQM, PSQM+, PEAQ, PESQ and 3SQM addresses the testing advantages of utilizing ITU's current and proposed standards for today's and future networks. [. . . ]