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1 ClearView Video Analysis System
The ClearView Video Analysis system is a full-reference video quality analysis system that provides all the tools necessary for R&D laboratories, broadcasters, and transmission engineers to make deterministic measurements of video quality.
Capture Features:
The ClearView systems allow the capture of video content from virtually any source -- file, SDI, HD-SDI, DVI,
VGA, HDMI, Component, Composite, and S-Video. Regardless of the input, the video is converted, based on user choice, to fully uncompressed 4:2:2 Y’CbCr, 4:4:4 RGB, ARGB, or RGBA. Any inputted video sequence, regardless of dimensions, can be cropped or matted to fit into the selected output raster.
Analysis Features:
Analysis begins on any two video sequences which share the same resolution and color space. The goal is to calculate the video quality without human intervention – termed objective analysis. ClearView calculates the pixel differences between the video sequences and displays them as A-B with thresholding and add-back.
Add-back shows where pixels are greater than the threshold. Without Add-back shows the actual value of the pixel differences. The Pixel Value tool shows the Y’CbCr or RGB values at the pixel location for each video sequence.
ClearView applies various objective metrics to each frame of the video sequences, generates graphs, and logs the results. The current objective metrics supported include PSNR, SPATIAL, and TEMPORAL as defined by ITU-T P.910. While development of more advanced algorithms are ongoing, ClearView offers subjective viewing modes with objective measurements.
ClearView can easily be programmed to display video sequences for the expert viewers; while recording the objective metric score. While the Mean Objective Score (MOS) cannot be repeated, the objective metric can be easily and readily.
To aid in subjective video analysis, ClearView displays the video sequences at any rate in side-by-side, seamless split, or split mirror.
Playout Features:
Output rates are independent from input rates; so any video sequence can be outputted at rates in excess of
120Hz. The user has control over shuttle rates, jog, color look-up tables, zoom/pan, and field display. The video sequences are previewed within the ClearView Interface and sent to HD-SDI, SDI, Component, S-
Video, Composite, DVI, VGA, and HDMI. Normally, the video sequences are shown on the same display, but
Video Sequence or a portion of the video sequence can also be exported as uncompressed BMP, RAW or
AVI files.
Video Clarity, Inc.
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