By PURPLELEC | 24 June 2024 | 0 Comments
What is HDMI signal source?
HDMI (High-Definition Multimedia Interface) is a fully digital video and audio transmission interface standard. As a signal source, HDMI means that the device can output high-definition video and multi-channel audio signals through this interface without the need for digital-to-ana-log conversion, thus ensuring high-quality content transmission.
HDMI can transmit audio and video signals at the same time, and can transmit uncompressed high-definition video and multi-channel audio data with high quality, with a maximum data transmission speed of 5Gbps. At the same time, there is no need for digital/analog or analog/digital conversion before signal transmission. The HDMI specification can be used with broadband digital content protection (HDCP) to prevent copyrighted audio and video content from being copied without authorization.
HDMI is compatible with DVI in terms of pins, but uses a different package. Compared with DVI, HDMI can transmit digital audio signals, adds support for HDCP, and provides better DDC optional functions. HDMI supports a data transmission rate of 5Gbps and can transmit up to 15 meters, which is enough to handle a 1080p video and an 8-channel audio signal. In addition, HDMI supports EDID and DDC2B, so devices with HDMI have the characteristics of "plug and play". The signal source and display device will automatically "negotiate" and automatically select the most appropriate video/audio format.
Common HDMI signal source devices include but are not limited to:
• Set-top box: used to receive and decode digital TV signals or network TV services.
• DVD or Blu-ray player: a disc drive that plays high-definition video content.
• Personal computer: including desktops and laptops, used to output the content on the computer screen to an external display or TV.
• Game console: such as PlayStation, Xbox or Nintendo Switch, used to play games on a large screen.
• AV receiver: a central device that integrates audio and video signal management, commonly used in home theater systems.
• Digital camcorder or camera: can be directly connected to a TV or monitor to play back the captured high-definition video.
HDMI not only provides high-definition video signals, but also transmits high-quality audio at the same time, so that a single cable can meet the transmission needs of audio and video, greatly simplifying the wiring of home entertainment systems. With the advancement of technology, the HDMI standard is also constantly upgrading, adding support for higher resolutions (such as 4K, 8K), higher frame rates, HDR (high dynamic range), wider color gamut, and higher audio specifications.
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