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    Video testing for broadcasters


    Added: 13-07-2004
    Author: Bill Reckwerdt
    Category: Telecommunications     		← Back | ↓ Related | Home →


    Video processing and compression algorithms change the characteristics of the initial plan in an effort to reduce the bandwidth required to send home information programming. Art is to do this without allowing the audience to see a change in video quality. Successful video processing and compression algorithms to implement the changes when presenting the results viewer that, subjectively, looks natural and realistic. This seems difficult, but important when many transmission channels of high quality programs.

    Every broadcaster - traditional or web caster - must deal with rapid changes of this type of program, new video processing algorithms, and a new compression algorithm. Video processing and compression companies go forward to find ways to reduce the demand for greater bandwidth control standards. How broadcasters to see whether the new algorithm is better than their options now?

    Broadcasting invite various video compression and processing companies in R & D facility, and to do side by side test also known as bake-off. Any vendor starting with the same source material, and reduce their bandwidth while maintaining the best video quality on.

    Broadcast shows the results of a group of experts and asked them which one is better. This is called subjective video analysis, and the size of the public perceived video quality. More commonly used method of evaluating the video quality is the Mean Opinion Score (Mos), recommended by the ITU. This is the number of experts see distorted video sequences specific to the level of quality, in accordance with standard quality young. By doing this expert audience is training to build a map between the small and the set of processed video sequences. Once training is complete, participants were then asked to rate the new video processing algorithms.

    Simply stated, the test setup is

    Complexity arises as

    Simple solution to streamline the process, equipment for testing the video quality needs to be defined, which can capture, play, and analysis of each of two video sequences. More, as the new input / output module under continued development, testing equipment must use an open architecture approach with easy upgradeability.

    The following are important characteristics of video quality testing tools that strong.

    Using a case example of this began, broadcaster can match a competitor's image processing algorithms, new algorithms of their clients in relation to their age, and / or video compression in real honor. Video sequence can be displayed in some fashion or programming saw 2 Displaying sent by subjective evaluation. Meanwhile, several objective metrics calculated, graphics, and users to be repeated, objective quantitative assessment. The process can be fully automated.

    A Solution / System Integrator to create solutions using broadcast encoder, network, video, processing, VOD, access conditions, and set-top box providers. They market and sell their solutions Broadcaster or service provider. You must provide test results on the basis of the establishment of a written report and wanted to show them the video Broadcast client results. Sometimes they can get advertisers to come to the hospital to see the solution, and sometimes the solution should show results in broadcast facilities. Thus, children with additional needs





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