High definition multimedia interface (HDMI) is a kind of digital video / audio interface technology. It is a special digital interface suitable for image transmission. It can transmit audio and image signals at the same time. The maximum data transmission speed is 2.25gb/s. At the same time, it does not need to carry out D / A or a / D conversion before signal transmission.
HDMI can be combined with broadband digital content protection (HDCP) to prevent unauthorized copying of copyrighted audio-visual content.
The extra space provided by HDMI can be used in the future upgraded audio and video formats.
Compared with existing analog video interfaces such as composite, S-Video and component video, HDMI has the following advantages:
1. Quality: HDMI is a digital interface that provides the best video quality because all analog connections (such as component video or S-Video) require no loss when converting from analog to digital. This difference is particularly evident at higher resolutions, such as 1080p. Digital video will be clearer than component video, eliminating the softness and tailing found in component video. Tiny, high contrast details such as text take this difference to the extreme.
2. Ease of use: HDMI integrates video and multi-channel audio in a single cable, thus eliminating the cost, complexity and confusion of multi cables used in current a / V systems. This is especially useful when upgrading or adding devices.
3. High intelligence: HDMI supports two-way communication between video source (such as DVD player) and DTV, and realizes new functions, such as automatic configuration and one click play. By using HDMI, the device automatically transmits the most efficient format for the connected display (e.g., 480p vs 720p, 16:9 vs 4:3)? Eliminating the need for consumers to scroll through all the format options to guess the best viewing format.
4. High definition content ready: HDMI devices supporting HDCP can access advanced high-definition content, which brings me some comfort. HD-DVD and Blu ray have delayed the start of the image resist mark (also known as the content protection mark) for today's high-definition movies to help minimize potential problems due to conversion, but it is expected to start this mark within a few years, which means that future high-definition movies will not be able to play in high definition through unprotected interfaces (such as analog components).
Product Name : HDMI