TDT RZ2, Manual

Page: 372 / 736

8-4 System 3
RV2 Video Processor
Snapshots are sent from the RV2 over the network to the PC for laying out regions
using RVMap software. Configuration files are sent from RVMap software to the RV2,
also over the network.
The RV2 contains an integrated switched-mode power supply. The power supply
auto-detects your region’s voltage setting and no further configuration is needed. A
switch located on the back panel of the RV2 is used to enable/disable the power
supply.
Software Control
Software control is implemented with circuit files developed using TDT's RP Visual
Design Studio (RPvdsEx) on the RZ processor through TDT’s OpenEx software
package. A single RPvdsEx macro is provided to configure the RZ to send trigger
information to the RV2 and receive frame and positional information.
See the “RZ Z-Series Processors”, for more information on your RZ processor. For
circuit design techniques and a complete reference of the RPvdsEx circuit
components, see “MultiProcessor Circuit Design” and “Multi-Channel Circuit Design”
in the
RPvdsEx Manual
.
RVMap software is used to define regions and tracks for the RV2 search algorithm
and determine what data is returned to the RZ for real-time analysis and/or storage.
See “RVMap Software for RV2” on page 8-21, for more information.
Triggering the RV2
The Video_Access macro is provided for configuring video tracking and must be
added to the circuit file used in OpenEx. The macro has settings for the frame
control, rate, and storage. See the macro internal help for more information.
This macro also requires that the
CoreSweepControl macro is present in
the circuit to handle all circuit timing.
The Video_Access macro stores
timestamps when frame information is
received. The PosData multi-channel
stream contains tracker positions.
Information for up to eight targets can
be returned to the RZ for storage.
RVMap is used to define the targets that
are returned to the RZ. The Video_Access macro must be assigned to the DSP that
is physically connected to the RV2.
The Video_Access macro controls when frame triggers are sent from the RZ to the
RV2. The RV2 receives the trigger, retrieves an image from the camera, adds it into
the video file, performs the tracking algorithm and prepares the tracking data to be
sent to the RZ.
The RV2 waits until the next camera trigger from the RZ before returning the
tracking data from the previous frame to the RZ. This ensures that there is always
enough time to collect an image from the camera and run the tracking algorithm on
it, and greatly reduces the likelihood that a frame is missed due to jitter in the
collection process. However, because of this protection the data received by the RZ
is always off by one frame.
When track data is sent to the RZ it is also written to the tracking.txt file. The
timestamp in the tracking.txt file indicates when the data was collected from the
camera and is relative to when the RV2 began recording.