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SP-4D - Overview
3
3 Overview
The
SP-4D
4-Channel HD-SDI Synchronizer
is a synchronizer for serial digital
signals up to HD-SDI. The unit synchronizes up to four channels from the
dedicated digital genlock input or any other specified channel.
The multi-standard synchronizer
SP-4D
can convert the frame rate of HDTV
signals without changing the number of lines per frame or the progressive–
interlaced raster structure. It implements cross conversion between any two
standards belonging to the same group. Three groups contain mutually compatible
standards:
•
720p: 720p/50, 720p/59.95, 720p/60
•
1080i: 1080i/50, 1080i/59.95, 1080i/60, 1080psf/23.97, 1080psf/24,
1080psf/25, 1080psf/29.97, 1080psf/30
•
1080p: 1080p/23.97, 1080p/24, 1080p/25, 1080p/29.97, 1080p/30
Each of the four SDI channels contains a special audio synchronizer that de-
embeds all 16 input audio channels, resamples them simultaneously, and embeds
the resulting audio signals in the SDI output. This corrects signal deterioration
such as a frame drop or repetition that may occur during video signal
synchronization.
The
SP-4D
features:
•
Multi-standard operation: SDI (SMPTE 259M and SMPTE 344M) & HD
−
SDI
(SMPTE 292M)
•
Four SDI video inputs and outputs (SD, ED and all HD, besides 1080p/50
and 1080p/60) with automatic standard detection (any video input can be
used as the timing reference input for all channels instead of the dedicated
genlock input)
•
One dedicated SDI genlock input common for all four channels (also in the
same standard group)
•
An audio embedder/de-embedder that handles 16 audio channels per input