[opendtv] Re: 480i 16:9 with pillarboxed image

  • From: Craig Birkmaier <craig@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Fri, 28 Dec 2012 09:32:11 -0500

At 12:42 AM +0000 12/28/12, Tom McMahon wrote:
Dumb question: are/were there any MPEG-2 HW encoders that could gobble 720p60 and emit 480p60? Could you do it today in SW? Or has this all now become irrelevant entirely?

The biggest problem is that 853 x 480@60P exceeds the pixel clock for MPEG-2 MP@ML (10.4 Mpixels/sec).

It is possible to encode 480@60P using MP@HL, although I am not aware of hardware encoders that do this. There are a variety of software encoders that can do this, but most of the IP world has moved on to h.264, where 480P is the norm rather than the exception.

So for now, I agree with Mark, just encode everything in the MP@ML 16:9 wrapper...

Interlace refuses to die!

It would be ironic if the installed based of MPEG-2 in the broadcast and MVPD industries are the Achilles heel that ultimately causes consumers to move to IP based services.


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