Tokyo, Japan, July 13, 2021-Renesas Electronics Group (TSE: 6723), a global semiconductor solutions provider, today announced the launch of a new automotive high-definition link (AHL) technology-the new RAA279971 AHL encoding chip and RAA279972 decoding chip , Enabling automakers to transmit high-definition video through low-cost cables and connectors that currently support standard-definition video. High-definition video is becoming more and more critical in the object recognition function of car security systems. As a leader in the Advanced Driver Assistance System (ADAS) market, Renesas’ new AHL can be paired with other products such as its R-Car SoC, RH850 MCU, in-vehicle PMIC, and analog devices to cost-effectively implement numerous safety functions in almost any vehicle.
The new RAA279971 AHL encoding chip and RAA279972 decoding chip use modulated analog signals to transmit video, and the transmission rate is 1/10 of the requirements for digital high-definition signal transmission. The lower transmission rate means that traditional twisted-pair cables and standard analog connectors can be used, and existing analog video cables and connectors can also be used. On the other hand, digital links such as SerDes require highly shielded cables and high-end connectors, and their cost is much higher than that of AHL. They may need to be replaced after 5-7 years, and wiring is difficult due to the limitation of their bending radius.
AHL has strong anti-noise ability, has a two-way control channel independent of video data operation, and can initialize, program and monitor the camera module. In the process of video transmission through a pair of unshielded twisted pair (UTP), the ability to control the camera at the same time is one of the key features of AHL, and this solution can also significantly reduce system costs. Compared with the digital link, another advantage of AHL is that in the rear view camera application, the cable harness or connector component failure will cause the digital link signal to degrade, because the weak signal will cause the macro block to appear, thereby hiding most of the Depending on the area. In the same situation, the AHL link will present a slight change in video color or contrast, but all pixels will appear on the screen, and the image will accurately identify objects or people behind the vehicle.
Niall Lyne, vice president of Renesas Electronics’ Automotive Analog Power and Video Division, said: “Advanced safety systems are no longer just for luxury cars. Now, the AHL system enables our customers to experience these in all new cars, including economic models. Function.”
Key features of AHL
· Supports high-definition resolutions from VGA to 720p/60 or 1080p/30, and can flexibly implement non-standard vertical resolutions (not only limited to the 16:9 resolution of the TV video standard)
· MIPI-CSI2, BT656 and DVP input and output provide flexible interfaces to support new and old image sensors
· Only a 27MHz crystal clock is required, and the internal PLL can generate the necessary clock frequency for higher resolution