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DM81XX low lantency slice H.264

anti max
Intellectual 545 points


Hi,
     I fowllowed steps of spry301.pdf<low lantency design>. I have make the H.264 encode work in slice mode.And alread make the caputre into slice mode by VINx interrupt of ISS module.But there is only one differences between my work with the demo in spry301.pdf. My video source is interlace 576I. So I need to use the dei module to reduce the sawtooth between odd field and even field. The bad news is that the dei can not work in slice mode , it blend the slice. So I think the H.264 encode maybe can work in interlace mode. But it is also failure.
My question ：
             1）Whether the demo in spry301.pdf can be used for Interlace video (576I)?
              2) How can I make the DEI module work in slice mode, but not blend the slice ?
             3) Whether the H.264 codecs can be create in blow mode ?(I failed)
                               GDR && IVIDEO_NUMROWS(slice in) && IVIDEO_SLICEMODE(slice out) && IVIDEO_INTERLACED

By the way The codecs version is 2.0， and IPNC DVRSK 3.5

  • 0
    Mastermind 8775 points

    Hi,

    I will reply with respect to codec.

    H.264 + Interlaced content + Low latency is possible.

    Antimax Antimax said:
    3) Whether the H.264 codecs can be create in blow mode ?(I failed)
                                   GDR && IVIDEO_NUMROWS(slice in) && IVIDEO_SLICEMODE(slice out) && IVIDEO_INTERLACED

    Intra refresh mechanism IH264_INTRAREFRESH_GDR is not supported for interlaced sequences and for ‘B’ frame cases. Instead you can  use IH264_INTRAREFRESH_CYCLIC_MBS. Please refer H.264 Encoder userguide for more information.

  • 0
    Expert 1610 points
    One thing that might help you , I am not sure If with DEI it is possible , DEI can be configured to think slice itself as frame . I.e If your planning to have 3 slices , then configure 576/3 as height for DEI and let width be same as FrameWidth .

    Thanks & Regards,
    Vishwanath Patil
    www.pathpartnertech.com/
  • 0 in reply to Vishwanath Patil
    Intellectual 545 points
    Hi,

    There is something that make me confused. I divide the top filed into 2 slice. And Send them to DEI module. I set the DEI module into "fldMode=VPS_DEI_EDIMODE_LINE_AVG" && "fid=FVID2_FID_FRAME". I think it is maybe right. But the slice 0 come out of DEI module twice. Such as top-slice 0,top-slice 0, top-slice1 ,bottom-slice 0 ... But why？
  • 0 in reply to anti max
    Intellectual 545 points

    Hi,

    I forget something . The demo is blew.8000_slice_dei.zip