Example Of Commands For Sync Generation; When To Issue Synchronized Playback Commands - Pioneer HD-V9000 Technical Manual

6.4 Example of Commands for Sync Generation

The following provides examples of commands used for controlling synchronized playback.
1. "FI" command for selecting files
Not required when there is only one video file in a video folder on an SD card
Not required for repeat play of the same file
2. "SE" command for finding playback start
3. Set "SM" stop marker
4. When each player has been set up, send the PL command (including CR) to all players
(broadcast transmission)
5. Make sure that all players play up to the set stop markers and then enter STILL mode.
Notes:
Confirm that a response to a previously sent command has been received before sending the
・
next command.
Use a controller or multiplexer that enables broadcast transmission of the "PL" command.
・
* The above command examples do not describe multiplexer control commands.
For perfect synchronization (with no frames out of sync), select devices and design a system
・
where the "PL" command is not issued in an unspecified area.
If a "PL" command is issued in an unspecified area, broadcast transmission may result in out of
sync playback.
Commands for starting synchronized playback should be as short as possible.
・
Send PL first before broadcast transmission of <CR>.
To accurately set start of synchronized playback, make settings when the players are not under
・
a heavy operating load (not during GUI or OSD display or LAN communications).

6.5 When to Issue Synchronized Playback Commands

The following compares the timing of synchronized playback commands and response time for the
HD-V9000 and the DVD-V8000.
Timing of synchronized playback control
Search time Time from "SE"  "R"
PL send wait Wait time from
completion of Search and
until sending PL
Location of Location of video start
video start after sending "PL"
command
Unspecified Area when time from
area for sending PL <CR> and until
synchronized video is output is
playback unspecified
Set 1 to 3 markers for each player
DVD-V8000
Approx. 1.2 sec
300 msec
nd
2 field after 4 fields
A period of 7 msec from
nd
start of the 2 field
* The same table appears also on page 9.
15
- -
HD-V9000 Technical Manual Ver. 1.00
HD-V9000 Ver. 2.0）
Approx. 3 to 3.5 sec
In firmware Ver. 2.00, no wait time is
necessary (0 msec), in earlier
firmware a wait time of 1500 msec is
required
After 1000 ms + 3 frames or after 1.1
sec
The time when synchronization is off
is approx. .0.1 sec
480i/576i/1080i: During the 2
720P: 5 msec after frame start
nd
field