Playing Control Panes

Color Space Pane

The Color Spa ce Pane controls how the A-B measurements are calculated and how the color components are displayed.

Color Space

Color Space Description

Y/ G Cr / R Cb / B	Check displays the Y or G. Uncheck turns this color space off Check displays the Cr or R. Uncheck turns this color space off Check displays the Cb or B. Uncheck turns this color space off. Y’CbCr is in Broadcast space; RGB is in Broadcast RGBA or DVI ARGB space.
Overlay	This puts the overlay text over the video sequence. The overlay is a text file which has the same name as the sequence name with a .cvo extension. An overlay file is automatically created with the sequence name inside when you import or record a video sequence. The maximum length of the overlay is 35 characters.
Force 601	Checking this box tells ClearView that the video sequence was encoded using 601 regardless of resolution Unchecking this box, SD uses 601; HD uses 709.
As Mono	Check shows the image in B/W mode. Uncheck: shows all colors.
Gamma / Lookup Table	Check lets you define your own Gamma/Look up table which redefines the values for Y’CbCr or RGB. The file where your own definition exists must be in the format as show in the LUT example below.
Filename	You can type in the full path and filename or select Browse to find the file Note: There are many examples under www.videoclarity.com/support.html (Miscellaneous Support Files).

The user can choose to display only the Red (R) in RGB space or the Luminance (Y) in YUV space.

The user can also define a more complex LUT (look-up table). The LUT is a tab delimited file ending in .lut. Several LUT files are provided with the installation. The columns are ordered as R-G-B or Cr-Y-Cb. As an example, a LUT in RGB 8-bit & Y'CbCr 8-bit, which only displays Red would look like the following (Note: that 0x10 is black for Y and 0x80 is black for Cr and Cb):

Example of RGB/Y'CbCr LUT

A 10-bit color space would have 1024 entries and values up to 1024. When using an A-B mode without Addback it is advised to use a LUT that spreads the small pixel values over a larger range.

Preview Update Pane

The Preview Update pane (at the top right corner of the GUI screen) controls the refresh of the preview displayed in the center of the ClearView GUI.

Note: This preview display is never updated faster than 30Hz so you should never rely on it as your only output. The Preview Update pane has no effect on the selected uncompressed video output.

Preview Update

Preview Update Descriptions

Live	Updates the Preview Window at up to 30fps Note: all of these modes only affect the Preview Window. They have no affect on the hardware output. The Preview Window is decimated as we are only showing 1 in 4 pixels horizontally and vertically.
1 fps	Updates the Preview Window at 1fps
10 fps	Updates the Preview Window at 10fps
User Action	Updates the Preview Window when the user clicks the mouse hits enter, etc.
Off	Does not update the Preview Window

Split Pane

The Split pane controls the way that Viewports A and B are displayed.

Split Pane

Split Pane Descriptions

Horizontal	Viewport A is displayed on top, Viewport B on the bottom
Vertical	Viewport A is displayed on the left, Viewport B on the right
Split Point	This changes the pixel number where Viewport A ends and Viewport B begins
Swap A/B	Show the video sequence assigned to A on Viewport B and visa-versa (for example, show clip A on the right and clip B on the left). The effect in A-B modes is that the math turns into B-A. Note: This gets very confusing. It is better to simply reload the sequences.
Multiple Outputs	Checking this sends Viewport A to one SDI output and Viewport B to the other. Note 1: This mode works only with the Broadcast I/O DL module Note2: This only works if the View mode is A-only or B-only.

Zoom Pane

The Zoom Pane allows integer-based, pixel replication zoom in both X and Y.

Zoom

Zoom is a global parameter and effects both Viewport A and Viewport B. This is an integer-based zoom. No pre-processing is done as ClearView does not affect the video quality.

Note: Zooming in/out can also be done with the mouse wheel. Move the mouse to the center-point for the zoom, and roll the mouse roller in/out. Use the left mouse button to pan and the roller to zoom +/-.

Disable Zoom/Split returns the system to single stream mode.

Note: There is no need to use this function unless a support person says to select it. When you select Disable Zoom/Split, ClearView unloads both video sequences from the Viewports. You will need to reconnect. Effectively, ClearView copies the output of the file system (or memory) directly into the input buffer of the output module (DVI or Broadcast I/O). This effectively removes zoom, split, color space, PSNR, (i.e., everything). You need to do this if you want to output at very high rates and resolutions, such as 1920x1080 at 120Hz.

Play Mode Pane

The Play Mode pane controls whether the clip is played 1x, forever in a loop, or forward then backward repeatedly. The Alternate A/B plays sequence A, then sequence B repeatedly.

Play Mode

Field/Frame Mode Pane

The Field/Frame Mode pane allows various options for viewing fields and frames. This is mainly used for interlaced material. These options are independent for Viewport A and Viewport B.

Field/Frame Mode

The fields can be displayed in four different ways:

Field Mode not selected. This is the normal mode of viewing Top Field then Bottom Field in all modes except NTSC where it is reversed.
Field Mode selected

F1 only – this displays Field 1 duplicated in both Fields
F2 only – this displays Field 2 duplicated in both Fields
F1 / F2 – this displays F1 duplication in both Fields followed by F2 duplication in both fields. Note: This is very helpful when checking to see if a video sequence has been loaded top/bottom reversed. This displays twice the information so the effective frame rate is halved (i.e., slow motion).

HotKeys Pane

The HotKeys pane allows the user to set various parameters and to see some attributes about the system.

HotKeys Controls

HotKeys Control Descriptions

Drop	This indicates if any frames have been dropped. There are 2 numbers and they relate to where the frame was dropped.
Config	This lets you set various general parameters for the ClearView. These settings are saved globally.
Hotkeys	This lets you set various keystrokes to do repetitive actions. These settings are saved globally.
fps	This is the measured frame rate.
Reset	This restores ClearView to the startup state
Exit	This exits ClearView (as does the X at the top of the screen and the ESC key)

Configuration Settings

Configuration Setting Descriptions

Memory Usage	ClearView uses memory for itself to draw the GUI and to display images on the GUI. For the most part it uses about 30% of the available memory. You can change this number to regain some memory for writing video sequences into RAM
Playback	Basically, you don’t need to touch these unless you want to playback audio or VANC data. In these cases, enable VANC or Audio. If the DVI setting cannot be verified based on EDiD codes, then it will be restored to the default. Nominally, this is 1024x768, but you can change it. Note: The others items in this group should be checked only after talking to Video Clarity customer support.
Record	This is the contra-positive of Playback. In other words, set this if you want to record audio or record VANC.
Import	This lets you import audio. It should be on by default. Note: The others items in this group should be checked only after talking to Video Clarity customer support.
Objective Metrics	Addback Negative Color – When B-A > Threshold in Addback mode, we show the pixel in a color. The default color is Yellow. You can change this. Addback Positive Color – When A-B > Threshold in Addback mode, we show the pixel in a color. The default color is Green. You can change this. JND Field Mode – This should be set to Auto which allows the system to do the right thing. For interlaced video sequences, the field mode should be field. For progressive video sequences, the field mode should be frame. You can override this. JND Deinterlace Flag – If you are calculating interlaced data in frame mode, then you need to choose a de-interlace method. In general, you should calculate fields in JND field mode. JND Color Modeling Flag – This is automatically set based on whether we are in HD or SD. This is an override. JND Viewing Modes in Picture Heights – This is how far the human tester was standing away from the display. JND has two defined distances based on the ANSI specification 2x (Expert) and 5x (Normal). Video Clarity includes 4x as in-between distance as well. JND Max Display Luminance – This is the luminance of the viewed display. Output JND Maps – This check box enables JND display maps to be written to disk. The maps give an indication of what the algorithm “saw” when calculating the metrics. It is useful for figuring out why the score is the score for video processing vendors. JND Map Location – This is where the map files are stored on the hard disk array. The files are viewed using a command line program called vpseqw32.exe. PSNR Numerator Limited to Legal Broadcast Values – The PSNR numerator is the maximum legal value. Normally, this is set to 255 for 8-bit and 1023 for 10-bit. ANSI suggests using 235 for 8-bit and 940 for 10-bit, which is the setting used if you select this option.

HotKeys

To change a Hotkey (aka keyboard shortcut), place the mouse in the space next to the function and type the keyboard sequence. Please remember that the keyboard sequence must begin with Ctrl or Alt. After changing the Hotkey, press OK. It will be saved for future use.

FPS is the current frame rate.

AM is a holding area which will become more audio metrics in the future.

Reset restores ClearView to its state when first entered. It removes the video sequences from memory as well.

Exit causes the ClearView application to quit