[mythtv-users] New deinterlacer for perfect image quality when using an interlaced display, mode that matches the source

[Paul Gardiner]

Mike Perkins wrote:
> Paul Gardiner wrote:
>> Tom Lichti wrote:
>>> On Thu, Mar 26, 2009 at 8:26 AM, Paul Gardiner <lists at glidos.net> wrote:
>>>> I've just created a patch that provides a deinterlacer for perfect 
>>>> image
>>>> quality and motion smoothness when using an interlaced display mode 
>>>> that
>>>> exactly matches the video source. See Ticket #6391. The deinterlacer 
>>>> comes
>>>> up in the menus as "Interlaced x2". It is also known as field order.
>>>>
>>>>
>>>> Preconditions of use
>>>> ~~~~~~~~~~~~~~~~~~~~
>>>> You need a graphics chip that can output interlaced display modes 
>>>> correctly.
>>>>
>>>
>>> Any idea what those might be? Very interested though.
>>
>> I think I've worded that condition in a confusing way. All should be
>> well if you are using TV out.
>>
>> I've been using the VGA to Scart trick, which requires interlaced TV
>> timings from VGA. Finding chip/driver combinations that can handle
>> that is harder. Many ATI chips now work if you use the radeon driver.
>> And development of the radeon driver is very active. I've had a Radeon
>> 9000 work. I'm currently using an integrated X1250. I've heard that
>> an integrated HD3200 will work.
>>
> I think a problem here is (correct me if I'm wrong) that TV out usually 
> means S-Video or Composite, neither of which will give you as good a 
> quality of picture on your TV as a VGA output (or something better like 
> DVI or HDMI, etc) would.

Yeah, you may be wrong. I think, for an SD source, most of our
deinterlacers degrade the quality more than the use of S-Video - for
SD you lose very little through S-Video.

Also, it may be possible to output 480i or 576i via HDMI (I'm afraid I
know little about that).

Cheers,
	Paul.