The monitor interface refers to the interface between the monitor and the host, usually DVI, HDMI, and 15-pin D-Sub:
DVI digital input interface: DVI (Digital Visual Interface) is a display interface developed with the development of digital display devices in recent years. In the display process of an ordinary analog RGB interface, digital/analog conversion is first required in the computer's graphic card to convert digital signals into analog signals for transmission to display devices. In digital display devices, analog/digital conversion is required. The analog signal is converted to a digital signal and displayed. After two conversions, some information is inevitably lost and the quality of the image is also affected. In the DVI interface, the computer directly transmits the display information to the display device as a digital signal, which avoids two conversion processes. Therefore, in theory, the image quality of the display device using the DVI interface is better. In addition, the DVI interface realizes true plug-and-play and hot-plugging, eliminating the need to shut down the computer and the display device during the connection process. Many LCDs now use this interface. The proportion of CRT monitors using the DVI interface is relatively small. It should be noted that the DVI interface of some liquid crystal displays can now support the HDCP protocol, laying the foundation for watching copyrighted high-definition film and television.
HDMI digital input interface: HDMI English full name is "High Definition Multimedia", Chinese means high-definition multimedia interface. The HDMI interface can provide up to 5Gbps of data transmission bandwidth, allowing the transmission of uncompressed audio signals and high-resolution video signals. At the same time, it is not necessary to perform digital/analog or analog/digital conversion before signal transmission, which can guarantee the highest quality video signal transmission. The advantage of applying HDMI is that only one HDMI cable is needed to transmit audio and video signals at the same time, unlike the need for multiple wires to connect; at the same time, higher audio frequencies can be achieved due to wireless digital/analog or analog/digital conversion. And video transmission quality. For consumers, HDMI technology not only provides clear picture quality, but also simplifies the installation of home theater systems because audio/video uses the same cable. The HDMI interface supports the HDCP protocol, laying the foundation for watching high-definition film and television with copyright.
In April 2002, Hitachi, Matsushita, Philips, Silicon Image, Sony, Thomson, Toshiba and seven companies established the HDMI organization to start developing new standards for digital video/audio transmission. At the end of 2002, the High-definition Digital Multimedia Interface (HDMI) standard was promulgated. By the end of 2006, the HDMI 1.0 standard was promulgated. The main change was to increase the bandwidth further in order to transmit higher resolution and color depth. . HDMI is pin compatible with DVI, but uses a different package. Compared with DVI, HDMI can transmit digital audio signals and add support for HDCP while providing better DDC optional features. HDMI supports data transmission rate of 5Gbps and can transmit up to 15 meters, enough to handle one 1080p video and one 8-channel audio signal. And because the demand for a 1080p video and an 8-channel audio signal is less than 4 GB/s, HDMI has a large margin. This allows it to use one cable to connect the DVD player, receiver and PRR, respectively. In addition, HDMI supports EDID and DDC2B. Therefore, HDMI-equipped devices have the feature of “plug and playâ€, and the “negotiation†between the signal source and the display device is automatically performed, and the most suitable video/audio format is automatically selected.
15-pin D-Sub input interface: also called VGA interface, CRT color display because of design and manufacturing reasons, can only accept analog signal input, the most basic include R \ G \ B \ H \ V (respectively red, green, Blue, line, field) 5 components, no matter what kind of interface is used to access, the signal contains at least these 5 components. The most common interface for most PC graphics cards is D-15, which is a D-shaped three-row 15-pin jack. Some of them are useless, and the signal lines used for connection are also missing. In addition to these five essential components, the most important thing is to add DDC data components to the color display after 96 years, which is used to read the color display brand, model, production date, and sequence recorded in the monitor EPROM. No., indicator parameters, and other information content to achieve the PnP (plug and play) function required by WINDOWS.
In addition to the above three common interfaces, there is also an ADC interface that is a dedicated interface for the Mac display. The biggest feature is that the data cable and the power cable are together, so that the monitor only needs one cable to meet the refreshing fashion of Apple Computer.
DVI digital input interface: DVI (Digital Visual Interface) is a display interface developed with the development of digital display devices in recent years. In the display process of an ordinary analog RGB interface, digital/analog conversion is first required in the computer's graphic card to convert digital signals into analog signals for transmission to display devices. In digital display devices, analog/digital conversion is required. The analog signal is converted to a digital signal and displayed. After two conversions, some information is inevitably lost and the quality of the image is also affected. In the DVI interface, the computer directly transmits the display information to the display device as a digital signal, which avoids two conversion processes. Therefore, in theory, the image quality of the display device using the DVI interface is better. In addition, the DVI interface realizes true plug-and-play and hot-plugging, eliminating the need to shut down the computer and the display device during the connection process. Many LCDs now use this interface. The proportion of CRT monitors using the DVI interface is relatively small. It should be noted that the DVI interface of some liquid crystal displays can now support the HDCP protocol, laying the foundation for watching copyrighted high-definition film and television.
HDMI digital input interface: HDMI English full name is "High Definition Multimedia", Chinese means high-definition multimedia interface. The HDMI interface can provide up to 5Gbps of data transmission bandwidth, allowing the transmission of uncompressed audio signals and high-resolution video signals. At the same time, it is not necessary to perform digital/analog or analog/digital conversion before signal transmission, which can guarantee the highest quality video signal transmission. The advantage of applying HDMI is that only one HDMI cable is needed to transmit audio and video signals at the same time, unlike the need for multiple wires to connect; at the same time, higher audio frequencies can be achieved due to wireless digital/analog or analog/digital conversion. And video transmission quality. For consumers, HDMI technology not only provides clear picture quality, but also simplifies the installation of home theater systems because audio/video uses the same cable. The HDMI interface supports the HDCP protocol, laying the foundation for watching high-definition film and television with copyright.
In April 2002, Hitachi, Matsushita, Philips, Silicon Image, Sony, Thomson, Toshiba and seven companies established the HDMI organization to start developing new standards for digital video/audio transmission. At the end of 2002, the High-definition Digital Multimedia Interface (HDMI) standard was promulgated. By the end of 2006, the HDMI 1.0 standard was promulgated. The main change was to increase the bandwidth further in order to transmit higher resolution and color depth. . HDMI is pin compatible with DVI, but uses a different package. Compared with DVI, HDMI can transmit digital audio signals and add support for HDCP while providing better DDC optional features. HDMI supports data transmission rate of 5Gbps and can transmit up to 15 meters, enough to handle one 1080p video and one 8-channel audio signal. And because the demand for a 1080p video and an 8-channel audio signal is less than 4 GB/s, HDMI has a large margin. This allows it to use one cable to connect the DVD player, receiver and PRR, respectively. In addition, HDMI supports EDID and DDC2B. Therefore, HDMI-equipped devices have the feature of “plug and playâ€, and the “negotiation†between the signal source and the display device is automatically performed, and the most suitable video/audio format is automatically selected.
15-pin D-Sub input interface: also called VGA interface, CRT color display because of design and manufacturing reasons, can only accept analog signal input, the most basic include R \ G \ B \ H \ V (respectively red, green, Blue, line, field) 5 components, no matter what kind of interface is used to access, the signal contains at least these 5 components. The most common interface for most PC graphics cards is D-15, which is a D-shaped three-row 15-pin jack. Some of them are useless, and the signal lines used for connection are also missing. In addition to these five essential components, the most important thing is to add DDC data components to the color display after 96 years, which is used to read the color display brand, model, production date, and sequence recorded in the monitor EPROM. No., indicator parameters, and other information content to achieve the PnP (plug and play) function required by WINDOWS.
In addition to the above three common interfaces, there is also an ADC interface that is a dedicated interface for the Mac display. The biggest feature is that the data cable and the power cable are together, so that the monitor only needs one cable to meet the refreshing fashion of Apple Computer.