A video file has been edited, meticulously reviewed and seems good to go. If this ends with a simple visual inspection, there is a good chance some video defects might go on the air unnoticed. On many occasions problems don’t manifest themselves unless the video is played on a different device or in a different player.
Signs of interlacing
The standard implies that in the digital representation of the YUV color space, the luminance Y-component (luma) is limited to specific values (for example, 16 to 235 for the 8-bit color depth). From a technical perspective, values outside the specified range are not “forbidden”. However, it’s highly probable that they won’t be displayed correctly during a broadcast and, therefore, have to be reset to the nearest “allowed” values.
Gamut errors
Each pixel of a frame is represented by a set of numbers that must be within a range specified in the standard. If these numbers are off, it could lead to an inaccurate display of the colors in the frame (Gamut errors). Examples of such errors could be that some of the colors look too saturated or faded, or the same color is displayed differently on different devices.
What could help: if you don't have an expert on your team, you‘re going to have a hard time locating Gamut errors on your own. Trying a special filter in Adobe Premiere could be a temporary solution.
If you need a quick yet comprehensive check of your video content for hidden defects try ORBOX. Run a set of tests and get a report detailing what frames had what issues.
