Re: Difference in luma-chroma delay of C64/C128 compared to standard S-video

From: HÁRSFALVI Levente <>
Date: Sat, 2 Sep 2017 12:03:59 +0200
Message-ID: <>

On 2017-09-02 03:58, Mia Magnusson wrote:

> ... 
>> So, to answer one of the original questions, the luma-chroma delay of
>> standard composite and separate Y/C video should be 0 ns within a +-25
>> ns margin.
> But that only says how the timing should be on Y/C, not on composite.

I'm not aware of any plausible differences between the two. Summing two
signals together imposes no extra delays whatsoever. Also, the standard
doesn't appear to be written in the sense that it'd care about some
particular devices difficulties (be producers or decoders of composite
luma and chroma) with regard to implied delays during signal
processing... If you think that over, it just can't be, since these
delays are completely implementation specific. So I'm assuming the 0
+-25ns requirement holds for both "composite" and "separate Y'/C".


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Received on 2017-09-02 11:00:03

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