HES20 - HD/SD embedded Dolby E alignment engine / frame synchronizer

Description

The HES20 is a Dolby-E aligner + frame synchronizer. The use of Dolby E in modern SD and HD SDI embedded infrastructures becomes more and more common. Dolby E has a guard-band that ideally sits exactly on top of the frame boundaries of the SDI video stream. Unfortunately this is not always the case. Individual audio and video propagation delay problems can cause a time shift of the Dolby E stream with respect to the SDI carrier, even when it is embedded. A common cause is an MPEG encoder – decoder configuration in a contribution environment. The shift in guard-band removes the feature within Dolby E to drop or rewrite a video-frame without audible clicks. Beside the compression this is one of the main reasons Dolby E is used.

The HES20 is the answer to this problem. The card automatically detects Dolby E and a possible offset of the guard band is measured. Any offset of up to +/- 0.5 Frame will be corrected automatically by delaying the Dolby E between 0.5 and 1.5 frame (The video part of the SDI stream is delayed by one frame as default). A free selection of four stereo pairs, out of the full embedded audio domain can be chosen. If a PCM channel is detected it will get an automatic offset delay of 1 Frame, equal to the video delay.

Features

• Automatic Dolby E alignment of up to 4 embedded Dolby E streams
• Individual offset delay for each Dolby E track -10 to + 10 lines
• Automatic detection of Dolby E versus PCM
• Full functioning Frame synchronizer allows for a-synchronous operation
• Compatible with the following standards:
  • 1080i-59.94
  • 1080i-50
  • 1080p-30
  • 1080p-25
  • 1035i-59.94
  • 720p-60
  • 720p-50
  • SD525
  • SD625

• Synchronize, delay and free-run modes
• ATC transparency acc. RP188, RP196, RP215
• Locks to Bi and Tri level syncs
• Offset H and V adjustment
  • Up to 2199 pixels H
  • Up to 1124 lines V

• Manual Freeze
• GPI Freeze
• OSD identity text
• I/O measurement propagation delay
• Built-in Proc-amp with individual controls for Y, Cr, Cb, Y-Black, Cb-Black, Cr-Black
• Line lock mode for better auto-phasing
• Audio format detection (e.g. AC3, Dolby E and PCM)
• Full control and status monitoring through the front panel of the SFR04/SFR08/SFR18 frame and the Ethernet port (ACP)
• Optional 1 fiber input (replacing 1 SDI input) or 1 fiber output (replacing 1 SDI output) on I/O panel