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is s-video outputed as NTSC?

  • 03-02-2006 4:22pm
    #1
    EpiphoneSpecial
    Registered Users, Registered Users 2 Posts: 344 ✭✭


    i ran my laptop to a new tv through s-video to RedWhiteYellow cable, bit blurry but worked fine.

    i did the same on a oldish tv, throught s-video to RedWhiteYellow using a scart adaptor, it came up black and white on the tv.

    does this mean, its NTSC output?

    thnx


Comments

  • #2
    Sam Vimes
    Registered Users, Registered Users 2 Posts: 21,611 ✭✭✭✭Sam Vimes


    no. i've heard a few differenet thoughts on this. some say its the "type" of pal setting on the tv so mess around with them to see if that fixes it. failing that you can get this. they guarantee it won't be black and white


  • #3
    incisor71
    Closed Accounts Posts: 281 ✭✭incisor71


    No, sounds like it's still outputting in PAL. Were you playing a PAL DVD from your laptop?

    If the picture isn't vertically shrunk or diagonally torn, but is black-and-white, then it sounds like you're using PAL alright, but you're using only one component of the S-Video signal.

    In a nutshell, an S-video signal contains two separate signals, the Y (luminance ... think of brightness/contrast) component, and the C (chrominance ... think of colour) component. If you only supply the Y component to a TV then you'll only see black-and-white.

    How old is your "old-ish TV"? If it's more than 10-12 years old, it may only recognise composite video, and without a separate chrominance input you won't be able to view the picture in colour.


  • #4
    EpiphoneSpecial
    Registered Users, Registered Users 2 Posts: 344 ✭✭EpiphoneSpecial


    Commander Vimes wrote:
    no. i've heard a few differenet thoughts on this. some say its the "type" of pal setting on the tv so mess around with them to see if that fixes it. failing that you can get this. they guarantee it won't be black and white

    LOL, thats the cable i bought from ebay, arrived about 2 hours ago.


  • #5
    EpiphoneSpecial
    Registered Users, Registered Users 2 Posts: 344 ✭✭EpiphoneSpecial


    incisor71 wrote:
    No, sounds like it's still outputting in PAL. Were you playing a PAL DVD from your laptop?

    If the picture isn't vertically shrunk or diagonally torn, but is black-and-white, then it sounds like you're using PAL alright, but you're using only one component of the S-Video signal.

    In a nutshell, an S-video signal contains two separate signals, the Y (luminance ... think of brightness/contrast) component, and the C (chrominance ... think of colour) component. If you only supply the Y component to a TV then you'll only see black-and-white.

    How old is your "old-ish TV"? If it's more than 10-12 years old, it may only recognise composite video, and without a separate chrominance input you won't be able to view the picture in colour.


    TV is one of those Power City specials from about 5/6 years ago. ZX-Series.

    The Red White Yellow where all firmly in the scart adaptor. The picture apart from being bit blurry, was good.


  • #6
    Stephen
    Registered Users, Registered Users 2 Posts: 18,484 ✭✭✭✭Stephen


    Make sure your laptop is set to output PAL-I. Newer tv's will usually work fine with a wide range of different input formats but older ones may not like anything but what they were designed for.


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  • #7
    incisor71
    Closed Accounts Posts: 281 ✭✭incisor71


    Stephen wrote:
    Make sure your laptop is set to output PAL-I.
    I was under the impression that the PAL variant only determines the position of the sound carrier relative to the vision carrier, for the purposes of RF modulation.

    Surely this is not a factor if composite video/S-video signals are being used?


  • #8
    chump
    Closed Accounts Posts: 3,807 ✭✭✭chump


    Well from my experience it's the cable.
    I have one s-vid cable that shows up as colour on only one scart connection on my new TV set (it has 3 or 4 scart sockets, all but one are b&w, 1 colour with this cable).
    Then the other cable I got, which as it happens comes in a package as provided by a friendly gentleman on boards http://www.boards.ie/vbulletin/showthread.php?t=2054880856 , works on colour on all the connections and on other tv's that I tried where the other one shows as b&w...


  • #9
    zilog_jones
    Registered Users, Registered Users 2 Posts: 6,638 ✭✭✭zilog_jones


    incisor71 wrote:
    I was under the impression that the PAL variant only determines the position of the sound carrier relative to the vision carrier, for the purposes of RF modulation.

    Surely this is not a factor if composite video/S-video signals are being used?
    That's true, except for PAL-M which is 60Hz and uses a 3.58MHz colour subcarrier like NTSC. I don't know why graphics card TV out things have all those options - I've never seen a graphics card that outputs RF O_o
    I have one s-vid cable that shows up as colour on only one scart connection on my new TV set (it has 3 or 4 scart sockets, all but one are b&w, 1 colour with this cable)...
    That's because that's a proper s-video-through-SCART adaptor - generally TV sets with multiple SCART sockets only allow s-video through one as one socket can't easily be designed to take both RGB and s-video - only one of the two. The other cable you were talking about must convert s-video to a composite signal, which any SCART socket should be able to take.

    Though be warned that composite video is more-or-less half the picture quality of s-video, especially in terms of colour - reds especially go very blurry with composite video. IMO composite is complete ass ^_^


  • #10
    incisor71
    Closed Accounts Posts: 281 ✭✭incisor71


    zilog_jones wrote:
    That's true, except for PAL-M which is 60Hz and uses a 3.58MHz colour subcarrier like NTSC.
    Yep, forgot about that variant, but seeing as that's only to be found in Brazil I could be forgiven for the oversight!
    zilog_jones wrote:
    IMO composite is complete ass ^_^
    That's true nowadays .... though when the format was developed 52 years ago there were all kinds of technical restrictions and technological limitations, and the signal had to be carried along just one wire. Pretty amazing, when you think about it, that composite video has stood the test of time so well....


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