The work principle of High-Definition Multimedia Interface and the standard of High-bandwidth Digital Content Protection is introduced. Then the structure and working characteristics of HDMI receiver chip are analyzed in detail. Based on H. 264 HD video real-time encoding system,a design of HDMI circuit is proposed, which includes hardware circuit and controlling software. The design support to receive and convert the uncompressed HD video, and output formats to meet the needs of the encoder chip.%简要介绍了HDMI接口工作原理和HDCP规范,详细分析了HDMI接收芯片的功能结构和工作特性,并给出了HDMI接口电路在H.264高清视频实时编码系统中的设计方法,设计的内容包括硬件电路和控制软件.该设计能够对未经压缩的高清视频信号进行采集和转换,输出符合编码芯片要求的视频格式.
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