Talk:Television lines

Objection

Objection to the last sentence: ... for a PAL system 625 lines, and for the NTSC system 525 lines. Not necessarily... PAL andNTSC are color TV systems. They can be apllied to all broadcast systems. There may be a 625 line NTSC and 525 line PAL. In the above sentence the word PAL should be replaced by system B and the word NTSC should be replaced by system M. Nedim Ardoğa (talk) 09:44, 29 March 2010 (UTC)

PAL and NTSC articles indicate resolutions of 625 and 525 lines respectively. The assertion that other resolutions are possible for these systems is largely theoretical. ~Kvng (talk) 23:51, 11 November 2019 (UTC)

TVL is independent of field-of-view and size of display

I think the following two sentences are either confused or wrong.

> "TVL also makes a variation on horizontal angle of display from a video camera, i.e. The more the TV Lines depending on the size of lens, the smaller/narrower the angle of coverage but better picture quality."

> "TVL also makes a variation on an angle of display from a video camera, i.e. The more the TV Lines depending on the size of lens the smaller the angle of coverage but better picture quality."

I would say that TVL is independent of the size of a display panel, and also independent of the field-of-view of a analog camera. Glueball (talk) 06:21, 1 August 2011 (UTC)

You are correct. The lens focal length and sensor format determine the field of view. Fixing. Schitso (talk) 15:39, 25 July 2012 (UTC)

This is really foreign

I think most people arrive at this article with years of experience dealing with the number of horizontal lines, such as 480, 720, and 1080, as a standard method of describing resolution. It would help if this article would explain the concepts by comparing this relatively unknown "TVL" with the modern method.

For starters, after reading the article, I am still left wondering how many horizontal and vertical pixels are generally found in TVL. Maybe it varies with the device, but so it varies with today's devices too, so the answer can be forthcoming. As we're able to discuss assorted resolutions with today's devices, providing some specific examples of TVL vs. Display Resolution would help us visualize the concept.

74.197.156.147 (talk) 17:14, 15 May 2015 (UTC)