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John Futter
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We are currently importing and re-selling the Brightsign HD600 units and would like to gather experience of users in Europe regarding 720 x 576 format MPEG2 files with the Brightsign. We are finding that playback of these files can 'stutter' during output. What combination of resolution / interlaced / progressive is best to use for the Component outputs.
Overall we find the Brightsign to be a very good unit, but we would like to get the best out of it.
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  • 0
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    RokuLyndon


    John,



    Are you saying if you author the same content as NTSC, there's no stutter, all other settings being the same?



    -how are you playing back the files? (playlist, csv, autoplay.mpg)

    -which software version are you running?

    -which autorun.bas are you using?

    -does this stutter happen every time?
  • 0
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    Matthew Neutra


    In order to not experience stutter you have to make sure you are using 16 bit audio, not 24 bit audio.



    I am using thousands, yes, thousands of HD600's in the field with great success.



    -MN
  • 0
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    RokuDaveC


    "JohnF" wrote:

    We are currently importing and re-selling the Brightsign HD600 units and would like to gather experience of users in Europe regarding 720 x 576 format MPEG2 files with the Brightsign. We are finding that playback of these files can 'stutter' during output. What combination of resolution / interlaced / progressive is best to use for the Component outputs.
    Overall we find the Brightsign to be a very good unit, but we would like to get the best out of it.




    Almost all HD TV's shipping today are 768 pixels or more high and widescreen. Therefore, running at 720p makes the best use of the resolution. Although video is limited to SD, bitmaps can be 1280x720 to make use of the full 720p resolution.



    Because 720p is progressive, the MPEG2 should be encoded as progressive also. If the encoding is done at 720x576p you will get the maximum video quality for the HD600 and then you can choose how to scale this to the screen.



    1280x720p is 16:9 aspect ratio, so a video that is 720x576 (4:3 aspect ratio) if scaled to fill the screen would be stretched. Encoding the MPEG2 file as anamorphic is the solution here i.e. the video is 16:9 in shape, but the file is encoded as 720x576p. Then when the file is played and stretched to fill the widescreen, the aspect ratio will be correct.





    For displaying on PC type screens things are a little different. 1024x768 is the best resolution on the HD600 and this is a mode that most monitors support natively, though choosing a monitor with 1024x768 pixels will mean that there won't be any scaling going on inside the monitor and so the picture quality should be at it's best. Encoding the video at 720x576p will give full screen video at great quality. If some content is to be letterboxed, you can either let the HD600 deal with this automatically by using 'scale to fit' mode, or you can do the letterboxing when creating the content so that your 720x576p file contains the letterbox. This will give slightly reduced video quality but give you finer control over your content positioning.



    Finally, PAL and NTSC. These are the lowest resolution modes on the HD600 but if you have to use them then it is worth encoding the MPEG2 file as interlaced from the start. The HD600 can easily play back a 720x576p file at an interlaced output resolution like PAL, but it is more efficient and can give better results if the MPEG2 file is encoded as interlaced.



    I think that's it, if there's anything confusing in here, or I've got something wrong (it's early still!) don't hesitate to let me know,



    Thanks!



    DaveC.
  • 0
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    John Futter


    Dave



    Thanks for your advice, we had been doing all that you mentioned but the image was stuttering sometimes and the loop point was very slow.

    However, after installing the new firmware all is fine, looks great now.



    I will now have to try the 720p encoding, the material is currently interlaced.



    All we need now are more units, demand is exceeding supply !

    Thanks again
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