Central Vision Processing Module (CVPM)

The Central Vision Processing Module (CVPM) generates the view in the Surround View Camera (SVC) system (sales code XAK) display according to inputs received from the four external cameras and driver touch screen inputs via Low Voltage Differential Signal (LVDS) coaxial cables. The CVPM combines the video feeds together and outputs it to the display screen. On vehicles equipped with the SVC system, the CVPM transmits the rear camera view from the liftgate handle to the radio display screen on vehicles that are equipped with the Cargo and CHMSL Lamp (sales code LPE) and not  equipped with the Center High Mounted Stop Lamp (CHMSL) cargo view camera (sales code LPD). The CVPM receives:

• signals from all four cameras.
• the reverse gear status.
• the steering angle signal.
• the vehicle speed signal.
• the door ajar switch status for all 4 doors and the liftgate.

The CVPM uses these signals to process and determine dynamic grid line images. The CVPM uses the CAN-IHS network to send each of the images to the radio for display.

CVPM AND THE INTERACTION WITH THE PARK ASSIST SYSTEM AND SIDE DISTANCE WARNING 

The CVPM displays the park assist and Side Distance Warning (SDW) on the surround view top display. The CVPM receives inputs from the Central Vision Park Assist Module (CVPAM) with the active state of the park assist detections. If there is an object detected within the respective radar range or area; the PAM will alert the BCM by sending the appropriate message. The BCM gates the message and sends the message to the CVPM. The CVPM receives this message and then outputs the appropriate arc display request to the radio display screen.

For further information on park assist. Refer to STANDARD DRIVER ASSISTANCE SYSTEM, DESCRIPTION AND OPERATION .

Inputs

• Acquisition on the CAN-IHS bus of the driver door ajar signal.
• Acquisition on the CAN-IHS bus of the passenger door ajar signal.
• Acquisition on the CAN-IHS bus of the left rear door ajar signal.
• Acquisition on the CAN-IHS bus of the right rear door ajar signal.
• Acquisition on the CAN-IHS bus of the trunk/liftgate ajar signal.
• Acquisition on the CAN-IHS bus of the front left park assist alert signal.
• Acquisition on the CAN-IHS bus of the front center park assist alert signal.
• Acquisition on the CAN-IHS bus of the front right park assist alert signal.
• Acquisition on internal signal Top+Rear when user select Top + Rear soft button.
• Acquisition on internal signal Top+Front when user select Top + Front soft button.
• Acquisition on internal signal Rear Crosspath when user select Rear Crosspath soft button.
• Acquisition on internal signal Front Crosspath when user select Front Crosspath soft button.
• Acquisition on internal signal Backup when user press "Backup" soft button in SVC screen.
• Acquisition on internal signal CVPM button press When user press Image defeat on the radio DSM.
• Acquisition on internal signal CVPM button press Not Pressed when user do not press Image defeat on the DSM screen.
• Acquisition on internal signal CVPM zoom When press Zoom button on the radio DSM screen.
• Acquisition on CAN-IHS bus signal for air suspension control module present/not present status.
• Configuration of the surround view camera image based on the driver DYNAMIC GRIDLINES ON/OFF personalization selection.
• Processing of the camera images: Distortion Correction, Projection Transformations.
• Blend and Stitch the adjacent camera images together resulting in the surround view camera image.
• Overlay a stylized vehicle (including corresponding doors and/or liftgate open/closed state) on the image relative to the camera view. All combinations of the doors and liftgate open/closed states are capable of being displayed.
• Overlay soft buttons for selection and display of the default view or other customer-selectable views.
• Map touch screen coordinates sent by the radio DSM to the soft buttons overlays and their associated functionality.
• Store and recall dynamic gridline ON/OFF state information over the ignition cycle.

Outputs

• Transmission on the CAN-IHS bus of the surround view camera image personalization selection signal to the radio DSM to indicate gridline personalization selected by the driver,
• Transmission on the CAN-IHS bus of the surround view camera image defeat signal to the radio DSM to switch Head Unit back to non-camera display operation.
• Transmit an video output signal to the radio.
• Transmission on the CAN-IHS bus of the display view status.