Functional Description CONFIDENTIAL
2-2 MVD500 User Manual 1.0
well as a DVB-ASI loop-through output for cascading several devices.
If no valid ASI signal is detected in the input a warning message is displayed in the
front panel. In this case the ASI output is invalid too.
TS Demultiplexing
When automatic program detection & selection mode is enabled the demultiplex
unit together with the embedded processor scan for PIDs from the PAT and PMT
tables, automatically selecting and configuring the first program service to be
found. However, program selection can be performed manually from the front pan-
el or from remote.
The TS Demux also incorporates the VBV-buffer mechanism as defined in the
MPEG-2 standard, performes timestamp evaluation/tracing and provides demulti-
plexed audio/video data to the dedicated decoder units.
If no program service is available or audio is missing an appropriate warning mes-
sage is diplayed.
Video Decoding
The video decoding unit performes decompression of the MPEG-2 data complying
to MPEG-2 MP@HL. All relevant broadcast video formats are supported, including
1/1.001 frequncies and 24 Hz frame rates. Thus image resolution and video data
rate may vary from SD to HD conditions.
Seamless switching
This decoder follows seamless switching of HD/SD as described in ARIB STD-B32
Part1 Chapter4.
Audio Decoding
A dual audio decoder unit performs decompression of two independend audio bit-
streams complying to MPEG-2 AAC. Unit #1 can perform up to 5.1 surround sound
decoding, unit #2 can perform to stereo decoding only.
Up/Down-Scaling
The video decoder unit transparently decodes video and outputs decoded data in
its native video format. To utilize simulataneous SD and HD video output a scaling
unit automatically performs the necessary up/down-scaling: SD-to-HD (up-)scal-
