Early Rear View Camera Video Display in Multiprocessor Architecture
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Solution Overview
Problem
Current infotainment systems in vehicles lack an efficient method to display rear view camera video images promptly and reliably, especially during vehicle startup, due to complex boot phases and communication protocols that can lead to message loss and delayed video display.
Innovation Solution
The system employs a vehicle communication controller and multimedia controller connected via an interchip communication bus, using a one-way protocol for message processing and a video driver loaded in a later boot phase to initiate rear view camera video display, with mechanisms to avoid message loss and handover control from early business logic to the rear view camera application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses a standard multi-phase boot process with multiple drivers, then system stability and completeness are improved, but the rear view camera video display is delayed and may lose messages during critical startup phases
Solution Approach 1:
The patent implements an early boot phase that executes before the standard multi-phase boot process completes. This preliminary action loads essential video drivers and initializes the rear view camera functionality early, ensuring video display reliability without waiting for the complete boot sequence. The early phase performs critical video subsystem initialization independently, resolving the contradiction by acting beforehand rather than following the standard delayed sequence.
Solution Approach 2:
The boot process is segmented into distinct phases: an early boot phase that handles video driver loading and rear view camera initialization, and a subsequent standard multi-phase boot process for complete system initialization. This segmentation allows the critical video display functionality to be established independently and early, preventing message loss and delay while maintaining the stability benefits of the complete boot process.
2Reliability
If the video driver is loaded in a later boot phase, then system stability is improved, but the rear view camera video display is delayed and may miss critical events during early startup
Solution Approach 1:
The patent loads the video driver during an early boot phase that occurs before the standard later boot phases. This preliminary loading of the video driver enables immediate rear view camera video display capability without waiting for subsequent boot phases, thereby improving video display speed while maintaining system stability through controlled early initialization.
Solution Approach 2:
The system dynamically adjusts the video driver loading timing based on system state. Rather than following a fixed boot sequence, the system implements a flexible boot process that can execute video driver loading in an early phase when appropriate conditions are met, optimizing both system stability and video display speed by adapting to actual system requirements.
3Adaptability or versatility
If the system uses a complex multi-processor architecture with multiple controllers, then functionality and features are improved, but message loss and communication delays occur during startup
Solution Approach 1:
The patent implements an early boot phase that executes preliminary message routing and communication initialization between controllers before the complete system startup sequence. This preliminary action ensures that critical messages are not lost during the complex multi-processor initialization, maintaining message delivery reliability while preserving the full functionality of the multi-processor architecture.
Solution Approach 2:
The system introduces an intermediary early boot phase that mediates communication between multiple controllers during startup. This intermediary phase handles message routing and coordination before the full multi-processor system becomes active, preventing message loss in the complex architecture while maintaining all intended functionalities.
4Reliability
If the system waits for all drivers to be loaded before displaying video, then completeness is improved, but the rear view camera video display is significantly delayed
Solution Approach 1:
The patent performs preliminary video driver loading and rear view camera initialization in an early boot phase before waiting for all other drivers to be loaded. This preliminary action establishes the video display capability early, significantly reducing startup time while maintaining display completeness by ensuring essential video functionality is in place before full system operation begins.
Solution Approach 2:
The driver loading process is segmented into critical video drivers loaded in an early boot phase and non-critical drivers loaded in subsequent phases. This segmentation allows the system to achieve display completeness with essential video functionality early, without waiting for all drivers, thereby significantly reducing video display startup time while maintaining necessary completeness.
Data Source
AI summary
An infotainment assembly for a vehicle has a vehicle communication controller and a multimedia controller with an interchip communication bus and a serial bus connection, a message processing unit and a remote messaging interface having a one-way protocol. The multimedia controller comprises a display connection for a display device, a message receiver, and a computer readable memory with an operating system having multiple boot phases, wherein graphics drivers of the operating system for controlling the display device are loaded in a later boot phase of the operating system. A video driver retrieves video signals, generates video images and transmits the video images to a display device during an earlier boot phase of the operating system.