In this video, i have explained Flicker and Interlaced Scanning in TV in Audio and Video Engineering, Television Engineering with following timecodes:
0:00 - Audio Video System / Television Engineering Lecture Series
0:20 - Outlines of Flicker and Interlaced Scanning in TV
0:59 - Basics of Flicker in TV
3:33 - Basics of Interlaced scanning in TV
9:04 - Calculation of Interlaced Scanning in TV
Following points are covered in this video:
0. Flicker in TV
1. Interlaced Scanning in TV
2. Basics of Flicker in TV
3. Solution of Flicker in TV
4. Basics of Interlaced scanning in TV
5. Working of Interlaced scanning in TV
Engineering Funda channel is all about Engineering and Technology. Here this video is a part of Audio and Video Engineering, Television Engineering.
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Details of Flicker and Interlaced Scanning in TV, Solution of Flicker in TV, Working of Interlaced scanning:
Flicker is a visual phenomenon that can occur in TV systems when the image on the screen appears to flicker or "beat" rapidly. This can be caused by the fact that the image is created using a series of horizontal lines that are scanned across the screen in a sequential manner. When the lines are scanned too slowly, the image can appear to flicker or "beat" because the lines are not being refreshed quickly enough.
One solution to the problem of flicker in TV systems is to use interlaced scanning. Interlaced scanning is a method of scanning the image in which every other line is scanned in one pass, and then the remaining lines are scanned in a second pass. This allows the image to be refreshed more quickly and can help to reduce or eliminate flicker.
Interlaced scanning works by dividing the image into two fields, each of which contains half of the total number of scanning lines. During the first pass, the electron beam scans the first field and illuminates every other line, starting with the first line. During the second pass, the electron beam scans the second field and illuminates the remaining lines, starting with the second line. The combination of the two fields creates a complete image on the screen.
Interlaced scanning can help to reduce flicker in TV systems by increasing the refresh rate of the image. By scanning every other line in one pass and then scanning the remaining lines in a second pass, the image can be refreshed more quickly and with less flicker. However, interlaced scanning can also introduce its own set of issues, such as interlacing artifacts and reduced vertical resolution.
In summary, flicker can be a problem in TV systems, but interlaced scanning can be used as a solution to reduce or eliminate it. Interlaced scanning works by dividing the image into two fields and scanning every other line in one pass and the remaining lines in a second pass, which increases the refresh rate of the image and reduces flicker.