Synchronized Playback Precautions; Basic Precautions For Synchronized Playback - Pioneer HD-V9000 Technical Manual

6. Synchronized Playback Precautions

This chapter summarizes the information required and the precautions to be observed in designing
synchronized playback systems using multiple HD-V9000 units. Be sure to also read the instruction
manual and the communications interface manual.

6.1. Basic Precautions for Synchronized Playback

For perfect frame synchronization, be sure to heed the following conditions.
 Set the following to the same frequencies.
• Video frequency of the playback video file
• Frequency of input external synchronized signals
• Scalar setting of HD-V9000 output video *
• NTSC/PAL switch
* Be sure to set the same aspect ratio for all playback video files. Select 1920 × 1080i for 1440 ×
1080i.
Use the same type of monitor.

TV monitors, projectors and other video display devices are often affected by input lag, the time
between the input of a video signal into a display and the time it is shown by the display. Since input
lag varies with monitor model, it is essential that the same monitor models be used.
 Control line
Use RS-232C to control synchronized start.
Note that Extend Terminal or Network will not enable synchronized playback control.
 Multiplexer (MPLX)
Use a multiplexer that can send RS-232C broadcast commands.
When perfect frame synchronization is required, use a multiplexer that allows you to send
commands at a consistent preset time.
Sending a PL command (sending CR) avoiding unspecified areas

There is a duration when playback video frames cannot be synchronized (they are 1 frame out of sync)
to enable issuing simultaneous PL commands after completing a search during synchronized playback.
To avoid this so called unspecified area, issue the PL command outside the following unspecified
areas.
1080i, 480i and 576i unspecified areas: Duration of the 2nd field
720P unspecified area: 5 msec from start of frame
Note: The unspecified area for DVD-V8000 lasts for 7 msec from the start of the second field.
Issuing a PL command to a DVD-V8000 during this interval will result in out of sync
playback.
Other details

• When video switchers or other devices are used between the HD-V9000 and the monitors, it is
essential that equipment selection and system configuration take frame synchronization into
account.
• HD-V9000 Video Out terminal is set to either NTSC or PAL. The external synchronizing function
cannot be used.
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HD-V9000 Technical Manual Ver. 1.00