What are the common audio and video converters？
Common HDMI interface video converters mainly include HDMI to VGA converter, HDMI to AV converter, HDMI to SDI converter, HDMI to color difference YPbPr converter, HDMI to S-Video converter, etc. The principle is to convert digital HDMI audio The video signal is converted into analog video signal and analog audio output. Some converters will support coaxial or optical digital audio output, and the resolution generally does not exceed 1920*1080p
The connection steps of this type of converter are generally as follows:
Step 1: Connect the HDMI output (HDMI host, such as: computer, set-top box, Blu-ray player, PS3/4/5, etc.) interface to the HDMI input interface of the video converter using a standard HDMI cable
Step 2: Connect the output interface of the video converter (such as: VGA interface, AV interface, S-Video interface, differential component YPbPr interface) with the corresponding cable and contains VGA, AV, S-Video, differential component YPbPr interface Display device (such as: old-fashioned TV, old-fashioned monitor) is connected; if the converter supports audio output, you also need to use the corresponding coaxial audio cable, optical fiber audio cable, lotus connector audio cable or 3.5mm audio cable to connect to the TV or External speaker
Schematic diagram of universal connection of HDMI interface video converter
Since there are video converters that convert HDMI to other video signals, there are also video converters that convert HDMI signals in reverse, such as: VGA to HDMI converter, SDI to HDMI converter, AV to HDMI converter, differential YPbPr converter HDMI converter, S-Video to HDMI converter, SDI to HDMI converter, DVI to HDMI converter, etc. These converters generally only support up to 1920*1080p HD resolution, and some advanced ones support analog audio and analog video. Simultaneously input the digital HDMI signal converted into audio and video synchronization, and then output to the HDMI display
The connection steps of this type of converter are generally as follows:
The first step: output the video signal of VGA, SDI, AV, S-Video, SDI, DVI, differential component YPbPr and other interfaces (such as: DVD, VCD, set-top box, camera, etc.) interface using the corresponding interface cable (VGA Use a VGA cable for the interface, use a lotus head cable for the AV interface, use an S-video cable for the S-Video interface, etc.) to connect to the corresponding input interface of the video converter
Step 2: Connect the L/R left and right stereo audio or 3.5mm stereo audio to the audio input interface of the video converter using a red and white lotus head audio or 3.5mm audio cable.
Step 3: Use a standard HDMI cable to connect the HDMI output interface of the video converter to an HDMI interface display device (such as a monitor, smart digital TV, etc.). If the display device is a digital TV, use the remote control to switch to Input HDMI interface, so you can realize the simultaneous transmission of audio and video images
Schematic diagram of universal connection of analog video to digital HDMI interface video converter
Next is the DP to HDMI converter. This converter is relatively simple. Connect the DP plug directly to the DP output interface of the host, and then use the HDMI cable to connect the HDMI output interface of the converter to the HDMI input interface of the display.
Schematic diagram of the connection and use of the DP to HDMI converter
Everyday common audio converters are also mentioned by the way. In general, the most common ones used at home are digital audio to coaxial, optical, and analog audio output, and then connect the audio; the more prominent representatives are the HDMI audio splitter and HDMI Audio converter
HDMI audio splitter generally does not affect the original HDMI signal. There will be 1 HDMI output. The principle is to copy and extract a copy of the digital audio signal in the HDMI signal, and then convert it into coaxial audio, SPDIF optical audio, L /R left and right channels and 3.5mm stereo audio output, not only can be used for traditional headphones, speakers, power amplifiers, subwoofers, etc. with only analog audio input, but also support power amplifiers and speakers with coaxial, SPDIF optical audio input
Schematic diagram of HDMI audio splitter connection and use
The principle of HDMI audio converter is to convert coaxial audio and SPDIF optical audio into L/R left and right channels and 3.5mm stereo audio output. It can only be used for traditional headphones, speakers, amplifiers, subwoofers, etc. that only have analog audio input.
There is also an industrial audio optical transceiver, which is generally used in pairs, one is the transmitting end and the other is the receiving end; the principle is to convert the audio electrical signal into an optical fiber signal and transmit it through the optical fiber, and then restore the optical signal at the receiving end Some audio optical transceivers also support two-way transmission of audio. Here we will take the two-way transmission audio optical transceiver 2SA as an example
Schematic diagram of two-way audio optical transceiver connection
Of course, if there are audio optical transceivers, then there must be video optical transceivers. Video optical transceivers are also used in pairs. The principle is similar to that of audio optical transceivers, but the bandwidth occupied by video optical transceivers will be larger than that of audio. The transmitter will convert the audio and video electrical signals into Optical signal. At the receiving end, the optical signal is converted into audio and video signals. Some also support infrared signal return, USB signal, etc.
Schematic diagram of video optical transceiver connection
In addition to the above, there are Type-C expansion docks and Thunder 3/4 expansion docks. The function of the expansion dock is to expand the HDMI interface, DP interface, VGA interface, DVI interface, USB interface, audio interface, Commonly used interfaces such as network cable interface are very suitable for laptops that need to expand the screen, USB interface, etc. When connecting and using, connect the device to the expansion dock once, and then connect the lightning plug or Type-C plug to the notebook, if you usually need it Take the laptop away, and you only need to plug in a cable when you come back, which is very convenient to use