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    How to Extract 24 bits per pixel image from YUV422 (CCIR565)?

    Hi everybody
    I want to grabb digital 24 bit per pixel video from PAL format analog video. I find the PAL video decoder TW9912 from Intersil that could decode analog PAL video to CCIR565 YUV422 digital video stream. How could i grab the 24 bit per pixel image from this digital video stream.

    Thanks in advance.
    Oveis

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    Re: How to Extract 24 bits per pixel image from YUV422 (CCIR565)?

    I2c for configure and ITU-R 656 for video stream
    Love me or hate me. All infractions will be ignored.



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    Re: How to Extract 24 bits per pixel image from YUV422 (CCIR565)?

    Quote Originally Posted by Easyrider83 View Post
    I2c for configure and ITU-R 656 for video stream
    Do you mean that Analog Video Decoders such TW9912 could be configured to be YUV420 instead of YUV422?!



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    Re: How to Extract 24 bits per pixel image from YUV422 (CCIR565)?

    Have you looked at commercially available "frame grabbers"
    purporting to handle at-speed video, to see

    1) which ones produce 24-bit video capture at video rate
    2) of those, what's the guts?

    Probably a HD or better stream will be difficult to throw
    across any distance without heavy compression (another
    stage of processing). Where will you put the data, is a
    point to ponder. But PAL (as my decades-stale understanding
    lies) is low resolution and low frame rate). On the minus
    side, PAL and NTSC are pretty poor Z resolution as well,
    as they are analog fundamentally and so prone to SNR
    degradation from many sources. That being the case, do
    you expect true chroma channel ENOB=8?


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    Re: How to Extract 24 bits per pixel image from YUV422 (CCIR565)?

    Quote Originally Posted by dick_freebird View Post
    Have you looked at commercially available "frame grabbers"
    purporting to handle at-speed video, to see

    1) which ones produce 24-bit video capture at video rate
    2) of those, what's the guts?

    Probably a HD or better stream will be difficult to throw
    across any distance without heavy compression (another
    stage of processing). Where will you put the data, is a
    point to ponder. But PAL (as my decades-stale understanding
    lies) is low resolution and low frame rate). On the minus
    side, PAL and NTSC are pretty poor Z resolution as well,
    as they are analog fundamentally and so prone to SNR
    degradation from many sources. That being the case, do
    you expect true chroma channel ENOB=8?
    Do you mean that the PAL Video Decoding with 24 bits per pixel is not meaningful at all?



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    Re: How to Extract 24 bits per pixel image from YUV422 (CCIR565)?

    No, I mean that expecting 8 bits of fidelity is probably
    going to end in some disappointment (if you were to
    measure; as video, you probably get out what you put
    in and maybe that's enough).

    But 24 bpp when the video quality only deserved 5+6+5
    just makes all of your hardware chain that much more
    challenging, for what upside?



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