TI's MPEG2 codec for interlaced decode

Keerthi Karanth

Prodigy 230 points

Hi All,

I am using TI's MPEG2 codec for interlaced decoding.

The IMPEG2VDEC_OutArgs after the decode is as below:

outArgs.is_mpeg2 = 1

outArgs.topfirst = 1

outArgs.repeatfield = 0

outArgs.progressive_frame = 0

outArgs.progressive_sequence = 0

outArgs.closed_gop = 0

outArgs.broken_link = 0

outArgs.pict_struct = 3 //MPEG2VDEC_FRAME_PICTURE

The value for outArgs.pict_struct should be either MPEG2VDEC_TOP_FIELD or MPEG2VDEC_BOTTOM_FIELD, is not my assumption right ?

How do we get to know from the out agrs whether the decoded video picture is a field or a frame?

Our system is having a LCD based display and thus want the display frame to be progressive frame. So what would be the best way to get the frame (de-interlaced) for display while using the TI's decoder.

Thanks and Regards,

Krt

over 16 years ago

Juan Gonzales over 16 years ago

TI__Mastermind 37340 points

What DaVinci platform are you using (DM644x, DM355, DM64x, DM643X, DM6467...)? In some platforms, de-interlacing can be done before you even pass data to MPEG2 encoder... I am investigating the outArgs...

Keerthi Karanth over 16 years ago in reply to Juan Gonzales

Prodigy 230 points

Hi Juan,

Its Davinci DM644X.

Thanks & Regards,

krt

Juan Gonzales over 16 years ago in reply to Keerthi Karanth

TI__Mastermind 37340 points

DM644X is one of the platforms in which de-interlacign can be done using the resizer before data is passed to MPEG2 encoder. As a matter of fact, the latest DVSDK (1.30.00.41) demos use this approach.

Keerthi Karanth over 16 years ago in reply to Juan Gonzales

Prodigy 230 points

Hi Juan,

Appreciate your input Juan.

We are using the MPEG2 decoder to decode the DVB streams.

The incoming DVB transmission is perhaps having non-progressive sequence and interlaced video stream.

We have implemented the re-ordering in the application to handle the non-progressive streams.

We need some method to handle the interlaced video. The output is having a lot of interlaced artifacts while being displayed on the LCD Panel.

Thanks & Regards,

Krt

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TI's MPEG2 codec for interlaced decode