User`s manual

Alcorn McBride Binloop User’s Manual Page 87
Video Formats
As stated earlier, the reproducers in the Binloop support only one
commonly used MPEG2 file format; the MPEG2 Program
Stream. This MPEG2 Program stream MUST contain a video
AND an audio track. Even if you do not wish to have audio for
your application, you must at least have a blank audio track. For
supported audio formats, see the Audio Formats section. The
next section describes the supported parameters for the video
portion of the Program Stream.
MPEG-2 Video Specifications
The decoder within the Binloop is compliant with Main Profile at
Main Level MPEG-2 specified in ISO/IEC 13818. The following
table summarizes the recommended encoding parameters for
creating MPEG-2 video that is compatible with the Binloop:
Setting Values
Profile Main
Level Main
Max Bitrate* 15Mbps (15000kbps)
Resolutions 480p, 480i – 720x480
576p, 576i – 720x576
Framerates** NTSC Interlaced – 29.97fps
NTSC Progressive – 29.97fps , 59.94fps
PAL Interlaced – 25fps
PAL Progressive – 25fps, 50fps
Aspect Ratios 16:9 & 4:3
Chroma Format 4:2:0
* Both Constant (CBR) and Variable (VBR) bitrate are supported,
so long as the bitrate does not exceed the maximum.
** The framerate is very important when encoding for the
Binloop, especially in synchronous playback applications. Only
these 4 settings should ever be used. Which one of the 4
depends on whether the Binloop is configured for NTSC or PAL
video systems, as well as the type of frame encoding used
(interlaced or progressive).