By PURPLELEC | 12 June 2024 | 0 Comments
Advantages of using digital HDMI in high-definition video capture cards
High-definition video applications are increasing. The emergence of bandwidth and time-varying services such as broadband network video, real-time streaming communications, large-capacity file transfer, storage area networks, and users' demand for high-quality service guarantees have put increasing demands on network bandwidth.
The demand for network bandwidth for high-definition, high-quality, uncompressed audio and video signal transmission is becoming increasingly prominent. As Moore's Law continues, users' network bandwidth levels will continue to increase.
Advantages of HDMI
The HDMI interface can provide up to 5Gbps of data transmission bandwidth, which can transmit uncompressed audio signals and high-resolution video signals. In addition to the advantages of synchronous acquisition and transmission of audio and video signals and high-bandwidth transmission, the HDMI interface has several features:
High-resolution quality: HDMI is a high-definition 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. Small, high-contrast details such as text bring this difference to the extreme.
Audio and video signal synchronization: Fully digital image and sound transmission interface, which can transmit uncompressed audio and video signals. HDMI supports standard, enhanced or high-definition video and multi-channel digital audio on a single cable. It transmits all ATSC HDTV standards and supports 8 channels, 192kHz, uncompressed digital audio and existing compression formats (such as Dolby Digital and DTS). HDMI 1.3 also adds support for new lossless digital audio formats Dolby® TrueHD and DTS-HD Master Audio™, with spare bandwidth for future enhancements and needs.
The HDMI interface is the only one that supports industrial, uncompressed, all-digital video and audio. As the latest international standard multimedia digital interface, HDMI provides an interface between video/audio sources, such as set-top boxes, DVD players; or interfaces for A/V receivers or monitors, such as digital TVs.
Expandability and ease of use: HDMI integrates video and multi-channel audio in a single cable, eliminating the cost, complexity and confusion of multiple cables used in current A/V systems. This is particularly useful when upgrading or adding equipment; supporting plug-and-play, HDMI is fully backward compatible with DVI-compatible devices. HDMI DTVs will display video from existing DVI-equipped products, and DVI-equipped TVs will display video from HDMI sources.
High intelligence: HDMI supports two-way communication between video sources (such as DVD players) and DTVs, enabling new features such as automatic configuration and one-click playback. By using HDMI, devices automatically transmit the most efficient format for connected displays (such as 480p vs 720p, 16:9 vs 4:3)—eliminating the need for consumers to scroll through all format options to guess the best viewing format. For example, the VS009 high-definition HDMI capture card can freely adjust the picture brightness, contrast, chroma, display ratio, etc., and has functions such as motion adaptive interlacing, digital scaling, and line field frequency changes.
High-definition content ready: HDMI devices that support HDCP will be able to access advanced high-definition content now and in the future, giving us some comfort. HD-DVD and Blu-ray already have a delayed activation of the Image Rejection Marker (also known as the Content Protection Marker) on today's high-definition movies to help minimize potential problems due to conversion, but are expected to activate this mark within a few years, meaning that future high-definition movies will not be able to be played in high definition through unprotected interfaces (such as analog components).
Purplelec HDMI capture card product features
What factors affect high-definition video acquisition and compression?
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