New Renesas Solution For Automotive Cameras Enables High-Definition Video Using Low-Cost Cables and Connectors

时间： 2021-08-06 来源：Renesas

技术问答

Automotive HD Link (AHL) Complements Other RENESAS Products in Auto Safety Systems; Includes Unique Control Channel That Initializes, Programs, and Monitors the Camera Function

July 13, 2021, TOKYO, Japan ― Renesas Electronics Corporation (TSE:6723), a premier supplier of advanced semiconductor solutions, today introduced its new Automotive HD Link (AHL) technology that enables automotive manufacturers to deliver high-definition video over low-cost cables and connectors that currently support standard-definition video. HD video is an increasingly important in-car safety system for object recognition functionality. Renesas is a leader in the Advanced Driver Assist Systems (ADAS) market, and AHL can be paired with other Renesas products, such as the R-Car Automotive SoCs, RH850 MCUs, automotive PMICs, and analog components to cost-effectively implement numerous safety features in virtually any vehicle.

The new RAA279971 AHL encoder and RAA279972 decoder use a modulated analog signal to transmit the video, enabling transmission rates 10 times less than required to transmit HD signals digitally. The lower transmission rate means that traditional twisted-pair cables and standard connectors can be used, as can existing analog video cables and connectors. On the other hand, digital links such as SerDes require heavily shielded cables and high-end connectors that cost significantly more than those for AHL, may require replacement after 5-7 years, and are difficult to route due to bending radius limitations.

AHL is robust against noise and has a bi-directional control channel that operates independent of the video data and can initialize, program, and monitor the camera module. A key AHL performance and cost-reducing feature is the ability to control the camera simultaneously over the same pair of wires (UTP) during video transmission. Another safety benefit of AHL is its performance in comparison to a digital link. In a rearview camera application, a digital link will degrade due to a failure in the cable harness or connector assembly, as weak signals can cause macroblocks to appear, hiding large portions of the viewing area. Using the same cable under the same conditions for comparison, 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 precisely identify an object or person behind the vehicle.

“Advanced safety systems are no longer only available in luxury vehicles,” said Niall Lyne, Vice President of the Automotive Analog Power and Video Business Division at Renesas. “The AHL system enables our automotive customers to now deliver these features in all new vehicles, including economy models.”

Key Features of AHL

· Supports resolutions from VGA up to 720p/60 or 1080p/30 for flexibility to implement non-standard vertical resolutions (not just the TV video standard 16:9 resolutions)

· MIPI-CSI2, BT656, & DVP inputs and outputs provide a flexible interface to support old and new image sensors

· Requires only 27MHz crystal clock, with internal PLLs able to generate the necessary clock frequencies for higher resolutions

发送到邮箱 |
+1 赞 0
收藏
评论 0
| 转发至：

本文由翊翊所思转载自Renesas，原文标题为:New Renesas Solution For Automotive Cameras Enables High-Definition Video Using Low-Cost Cables and Connectors，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

全部评论（0）

暂无评论

New Automotive High-Definition Link Lowers High-Definition Camera System Costs

To facilitate a cost-effective camera implementation in the vehicle, Renesas designed a technology which leverages the low-cost infrastructure used in traditional analog SD camera systems, while providing the picture quality and higher resolutions desired in today’s applications. AHL supports MIPI-CSI2, DVP, and BT.656 interfaces as inputs on the RAA279971, and as outputs on the RAA279972. It transmits excellent video quality at distances up to 30 meters with multiple in-line connectors. Renesas has user friendly evaluation boards, application notes, and IC samples available upon request.

新产品发布时间 : 2021-08-19