Veej wrote:
, so whats pseudo prog ?
It's only a term of convenience, I used once, and later Ganti (another zulmi Progressive DVD buff) liked it and hence we kept on using it to describe a certain type of encodings.
As film runs at 24 frames per sec, a Progressive NTSC DVD encoding records it in 48 fields with instructions to repeat every 4th field. This should be the default method of NTSC DVD encoding. For this type of encoding, this is the first basic test that a Progressive DVD player looks for and recreates the original film frames for display. This is what we call a
Progressive DVD.
There are reasons (mostly economical and ignorance), why many Indian DVDs record the repeated field all over again, instead of a repeat instruction (flag) to the player. (There are no flags). This type of encoding can be identified if consequitive fields are compared pixel by pixel. It's do-able but may or may not succeed in creating the original film frames, depending on noise. This is what we refer here as
Pseudo-Progressive, (which actually is interlaced).
A third category of encoding (most of present day Indian DVDs) has 60 fields per sec and all/ some or many fields containing averaged information (from more than one film frame). You can imagine, you can never obtain the original film frames.
This is what we refer here as Interlaced DVD.
Rana