Introduction to the relationship between HDMI and HDCP

Introduction to the relationship between HDMI and HDCP

When viewing video (Video) or playing PHOTOSHOP4 game (game) with HDMI, you often encounter HDCP encryption. What is the relationship between HDMI and HDCP? Presumably a lot of friends are not quite aware of (Find out), then the following ,We will introduce it to everyone. The video capture card is also called a video card. It is used to input video data or mixed video and audio data output from analog video cameras, video recorders, LD video players, and television output video signals into a computer and convert them into computer-readable digital data. Stored in the computer as an editable video data file. According to their use can be divided into broadcast video capture card, professional video capture card, civil video capture card.

HDMI, a type of high-definition (Clarity) multimedia interface that is widely known as a popular technology, is a digital video/audio interface technology and is a dedicated digital interface suitable for image transmission, which can simultaneously transmit audio and video. Image signal, the highest data (data) transmission speed is 18GbPHOTOSHOP (version 2.0), and the HDMI signal can directly transmit audio and video information, and does not need to perform digital/analog or analog/digital conversion before signal transmission.

HDCP is actually a high-bandwidth digital website content protection technology. High-definition video capture card that VGA high-definition capture card can directly capture VGA signal, can input VGA video signal acquisition and compression in real time, and can immediately display the VGA data of another or even multiple devices at the same time on one monitor, without adding extra device of. The era of HDTV (transmission TV) has come. In order to adapt to the high bandwidth of high-definition televisions, HDMI has emerged. And HDMI can provide high bandwidth, pass-through digital video and audio signals. In order to ensure that high-definition signals transmitted by HDMI or DVI are not illegally recorded, HDCP technology has emerged. The HDCP specification is led by Intel. When the user is illegal, the technology interferes, reduces the quality of the image, and protects the content.

HDCP requires hardware and software to support each other. Devices that participate in the transmission of content on the website are indispensable. Conference cameras are an important part of professional application in video conferences, lecture halls, video classrooms, and remote video terminals. Microsoft will integrate “protection” (boom content) output management in Vista, a new generation of operating system (system). The Output Management Protocol (OPM) is used to confirm the display device's properties and HDCP support conditions before outputting the content. At the same time as the main carrier of high-definition (transmission) video, Blu-ray and HD-DVD will also implement the HDCP standard.

In fact, HDCP is currently regarded as a popular digital content protection technology, which is widely distributed throughout the world. However, HDCP protection is a better support for the HDMI video interface. Therefore, many HDCP digital content encryption technologies are required to use the HDMI video interface for transmission. However, there are currently related HDCP crackers that can crack the encrypted HDMI video output.