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Television display difference between interlaced scan and progressive scan

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Hi,
In basic terms TV images are made up of hundreds of horizontal lines, with interlaced scan it will display in order line 1, 3, 5, 7 and so on and once it reaches the end it will fill in the missing lines 2, 4, 6 and so on until it starts again.
For progressive scan it will display the lines in order 1, 2, 3, 4, 5 etc.

cheers

Posted on Jan 21, 2008

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Is this TV digital


This is not a digital TV. This TV has only an NTSC (analog) tuner. A converter will be needed to tune digital broadcast TV stations, your CATV or satellite company supplies a converter to allow this set to display programs.

The display is limited to "480P" resolution, called "Enhanced Definition", which is a step up from the traditional NTSC standard of "480i" resolution or "Standard Definition". ("P is "progressive scan" and "i" is "interlaced scan"). Progressive scan provides a better picture quality when compared to interlaced scan images. High Definition or "HD" is a signal that contains data that allows display of images with 720P, 1080i and 1080P resolutions (the larger numbers indicate more information, or higher picture quality). Your TV will receive all signals, SD, ED and HD, but will down convert to ED. Signals can be brought into the set via 2 composite-video connections, 1 each component- and S-video, an RF antenna/cable-box/VCR input, and a 15-pin D-Sub analog RGB input. More info can be found here.

I hope this helps and good luck! Please rate my reply. Thank you.

Jun 01, 2011 | Philips 15PF7835 15 in. LCD Television

1 Answer

My memorex combo dvd & vhs player is not working right. can you help me? the vhs player works fine, but the dvd player display's a split screen on the tv with a large yellow box with the word PSCAN....


PSCAN is a short form for Progressive Scan - a line scanning format used for High Definition TV. Standard TVs use Interlaced scanning. On your DVD/VHS player, the VHS is an analogue signal recorded in interlaced mode so is fine for a standard TV. The DVD is a digital signal and cazn be processed for progressive scan output in order to produce a better picture on a High definition TV (or a TV capable of handling progressive scan). If you cannot to your TV via the HD outputs then you should be able to set the DVD player to output interlaced instead of progressive scan.

Mar 05, 2011 | Memorex MVD4540 DVD Player/VCR

1 Answer

Progressive scan?


No it's interlaced..
Progressive or noninterlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to the interlacing used in traditional television systems where only the odd lines, then the even lines of each frame (each image now called a field) are drawn alternately.
The system was originally known as "sequential scanning" when it was used in the Baird 240 line television transmissions from Alexandra Palace, England in 1936. It was also used in Baird's experimental transmissions using 30 lines in the 1920s.
Bill

Jan 04, 2009 | Mitsubishi CS-32509 TV

1 Answer

How do you know if you have a Progressive Scan TV? We are having problems playing DVD's from video stores. It will play the previews, but when it gets to play the movie, it doesn't play. I can play them...


Well, a progressive scan TV displays in the same resolution as a normal interlace TV. It's very hard to tell the difference in all respect.

Progressive rewrites every single line/pixel on the screen. Interlaced simply skips a line and rewrites half of the lines every frame. So, progressive can show higher quality, but interlaced was more predominant as it was easier to create for TV makers in the earlier days.

Most of today's better televisions are strictly progressive and you won't have any problems.

I'd try a different DVD player with the selected titles and see if the problem persists. It could be the TV or the or the player itself. If the titles work in another DVD player. Try a newer television and see if it works there.

Hope these ideas help.

Sep 21, 2008 | Televison & Video

3 Answers

NO HIGH DEFINITION


  • HDTV capable: Yes (up to EDTV, 480p)
  • Jul 10, 2008 | Akai PT5492S 54" Rear Projection...

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    Code


    Hi - Here is a description of a few terms that might help, especially if you're in the market for a tv. If this answers your question PLEASE rate this as fixed. If you need more help just add a comment and I'll be glad to assist you further. Thanks.

    High definition television is the highest form of digital television. It has a 16:9 aspect ratio, which is the same as a movie theater screen. This is possibly HD’s biggest selling point. The other is the resolution. High definition is the best available picture on a television. It comes in three different flavors: 720p, 1080i and 1080p.
    What do 720p, 1080i and 1080p mean?
    High definition programs are encoded with a type of resolution: 720p, 1080i or 1080p. The number stands for the amount of lines embedded within the signal. The letter describes the type of scan the television uses to display the picture. The ‘i’ means interlaced and the ‘p’ means progressive.
    Why does the amount of lines matter?
    The number of lines on a television is important because it allows for greater detail in the image. This is a similar concept to digital photos and how dpi determines print quality. The type of televisions all of us grew up watching had 480 visible lines on the screen. By doubling the amount of lines in combination with the type of scan, HD essentially doubles the quality of picture.
    Does it matter if the resolution is interlaced or progressive?
    The type of scan is arguable considering the amount of lines for each HD format. Progressive scan is a better type of scan because it doubles the amount of times the TV displays the image per one second in comparison to interlaced. Still, the difference between 720p and 1080i is so minimal that is isn’t an issue at all. While 1080p is better than 720p and 1080i, very few programs are made in this resolution so it really isn’t a factor right now…and, it might never be.

    May 12, 2008 | Durabrand DWT1905 TV

    2 Answers

    "Unusable Signal"


    Ok, I stopped short of going to Best Buy to get a new TV b/c my DAD suggested I pull the DVD player on another tv.

    Dang it, he was right!. Same "audio no video" problem.

    After playing with multiple buttons shooting blindly I found the [ I/P ] button restored the picture immediately!

    This stands for Interaced or Progressive scanning:

    from wikipedia

    "Progressive or noninterlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to the interlacing used in traditional television systems where only the odd lines, then the even lines of each frame (each image now called a field) are drawn alternatively."

    So, my Dad says that "TV s are based on the interlacing" technology. I must have picked progressive scan while I was in the dark fast forwarding last week.

    Mar 27, 2008 | RCA 27V530T 27" TV

    1 Answer

    No progressive scan from component input


    Sanyo DS27930 does not support progressive scan
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    Nov 24, 2007 | Sanyo DS27930 27" TV

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    Interlace Scan (IS) mode and the Progressive Scan (PS)


    The Interlace Scan (IS) mode the camera uses a mechanical shutter with shutter speeds up to 1/640th second. It also uses the maximum resolution that is possible with the CCD (5.0 MP). In the Progressive Scan (PS) mode the camera operates with the electronic shutter with shutter speeds up to 1/4000th second and a 1/18000 second shutter speed (1/18000 in Shutter or Manual Priority modes only). In this mode the resolution is reduced in half (2.5 MP).

    Aug 31, 2005 | Olympus Camedia E-20N Digital Camera

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