Progressive Video
The classical interlaced video signal that is compatible with a cathode ray tube television creates a flickering image that has an evident vertical jagged line, while the progressive video signal designed for LCD/LED/Plasma TVs ensures a more stable image that has no jagged lines. LCD/LED/Plasma TVs only read videos in progressive format; therefore, if they receive an interlaced video signal, they automatically convert it into the progressive format (deinterlacing), while they do not modify the video if the signal received is already progressive. The advantage of conveying a progressive video signal to an LCD/LED/Plasma TV lies in the fact that the signal is not deinterlaced by the TV anymore, and hence it preserves the original quality of the video. Moreover the image will be more stable and will not flicker. TV viewing of a progressive video ensures the same quality as the PC (which is progressive).
If you have an LCD/LED/Plasma TV then connect DVD player and TV with Component (left image) or HDMI cable (center image). Do not use SCART connection (right image), because it significantly worsens the video quality by causing deinterlacing of the video signal.

Example of interlaced frame
(note the typical vertical jagged line):

Example of progressive frame: