超高清显示接口芯片的软件及认证算法设计  

Design of software and authentication algorithm for UHD display interface chip

作　　者：张立新 张俊 马静 郭晓旭 阚希 ZHANG Lixin;ZHANG Jun;MA Jing;GUO Xiaoxu;KAN Xi(College of IoT,Wuxi University,Wuxi 214105,China;Jiangsu JITRI Intelligent Integrated Circuit Design Technology Co.,Ltd.,Wuxi 214433,China)

机构地区：[1]无锡学院物联网工程学院,江苏无锡214105 [2]江苏集萃智能集成电路设计技术研究所有限公司,江苏无锡214433

出　　处：《电子设计工程》2024年第11期146-150,共5页Electronic Design Engineering

基　　金：国家自然科学基金委员会青年科学基金项目(42105143);无锡学院科研启动费(550221018)。

摘　　要：针对超高清显示接口芯片产业应用时客户提出的内容保护需求,该文通过研究HDCP所涉及到的加解密算法,分析HDCP1.4、HDCP2.2认证流程,结合具体的高清接口转换芯片应用方案,设计了MCU软件的下载及调试方法,采用软硬件结合并主要由软件实现的方式,设计了认证算法。通过搭建系统测试平台并使用专用的协议分析工具,对HDCP认证过程进行试验,抓取通信协议过程,结果显示,复杂计算的响应时间在100 ms以内,通过I2C下载32k程序用时在32 s以内,满足了规范和客户需求。According to the content protection requirements proposed by customers in the industrial appl⁃ication of ultra⁃high definition display interface chips,this paper analyzes the encryption and decryption algorithms involved in HDCP,analyzes the authentication processes of HDCP1.4 and HDCP2.2,and designs the download and debugging methods of MCU software in combination with the specific application scheme of high⁃definition interface conversion chips.The authentication algorithm is designed by combining software and hardware and mainly realized by software.By building a system test platform and using a special protocol analysis tool,the HDCP authentication process was tested,and the communication protocol process was captured.The results showed that the response time of complex computing was within 100 ms,and the 32k program downloaded through I2C was within 32 s,meeting the specifications and customer needs.

关 键 词：HDCP 加解密算法 认证 接口芯片 

分 类 号：TN492[电子电信—微电子学与固体电子学]