Ethernet Video Architecture for Vehicle Displays
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Solution Overview
Problem
Traditional video transmission from host devices to display devices in vehicles involves high overhead and requires multiple bridges, increasing production costs and power consumption due to the need for transmitting video timings and blanking signals over cables like Coax, STP, or QSTP.
Innovation Solution
A video transmission architecture using an Ethernet network to directly send display content data from a host device's GPU-generated frame buffer to a display device's frame buffer, eliminating the need for bridges and allowing for raw data transmission, compression using DSC, checksum verification, and sync event adjustments for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional video transmission using bridges and cables (Coax, STP, QSTP) is used, then video signal can be transmitted from host to display, but bandwidth overhead and power consumption increase due to transmitting video timings and blanking signals
Solution Approach 1:
The patent extracts and eliminates the transmission of video timings and blanking signals from the video data stream. By separating these control signals from the pixel data transmission, the system transmits only necessary pixel data over Ethernet, reducing bandwidth overhead and power consumption while maintaining reliable video display through alternative timing mechanisms at the display device
Solution Approach 2:
The patent introduces an intermediary processing layer at both host and display devices that handles video timing and synchronization locally. Instead of transmitting timing signals over the network, each device processes timing independently, mediating between the Ethernet data stream and the display panel, thus reducing network bandwidth requirements while maintaining synchronization
2Ease of manufacture
If traditional video transmission architecture with multiple bridges is used, then video signal can be transmitted, but production costs increase due to requiring several bridge components
Solution Approach 1:
The patent merges the functions of multiple bridge components into a single Ethernet transmission interface. By combining video data transmission, timing synchronization, and signal conversion into unified Ethernet-based processing at the host and display devices, the system eliminates the need for separate bridge components, reducing both production cost and device complexity
Solution Approach 2:
The patent makes the Ethernet interface universal by enabling it to handle both video data transmission and timing synchronization functions that previously required dedicated bridge components. The host and display devices perform multiple functions locally, making the Ethernet connection a multi-functional replacement for several specialized components
3Quantity of substance
If video timings and blanking signals are transmitted over cable, then traditional video transmission can be achieved, but bandwidth overhead increases
Solution Approach 1:
The patent extracts timing and blanking signal transmission from the bandwidth-constrained video data stream. By generating these signals locally at the display device based on received pixel data, the system eliminates the need to transmit them over the network, significantly reducing bandwidth overhead while maintaining signal integrity through local regeneration
Solution Approach 2:
The patent performs preliminary processing of video data at the host device, organizing pixel data in a format that enables the display device to independently regenerate timing and blanking signals. This preliminary structuring of data allows the receiving device to reconstruct synchronization signals without receiving them directly, reducing transmitted data volume while preserving signal integrity
Data Source
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AI summary
Given an architecture for transmitting video content within a vehicle, it is an objective of the present invention to reduce overhead and reduce production costs and reduce power consumption. The objective is solved by a host device (205) configured to package stored display content data in a frame buffer each pixel of a display panel mapped to a unique integer in the frame buffer, and send the data over Ethernet network (225) to a display device (215); and the display device is configured to arrange the display content data in a display frame buffer (420), and display the display content data on a panel (250).