Yude YDIT analysis conference table desktop socket commonly used audio and video interface

Source:YDIT 誉德 Release time:2019/7/29 9:20:22 Views:965

 

The conference table (paperless conference system, ultra-thin one lifter) is equipped with a desktop socket, which is mainly an integrated device for the user to bring a notebook and other voice transmission to the conference system to provide audio and video sockets. Complete the function of graphic information transmission. Including audio transmission, video transmission, voice transmission and other functions. The audio and video interfaces commonly used in desktop sockets are as follows:
HDMI interface
Desktop socket HDMI interface
HDMI is a new generation of multimedia interface standard, the full name is High-DefinitionMultimedia Interface, Chinese means high-definition multimedia interface. It also provides higher bandwidth data transmission speed and digital lossless transmission of audio and video signals. HDMI delivers uncompressed HD video and multichannel audio data with high quality. At the same time, it is not necessary to perform digital/analog or analog/digital conversion before signal transmission, which can ensure the highest quality video and audio signal transmission. HDMI 1.3, the new standard has increased bandwidth and speed by more than 2 times, reaching 340MHz bandwidth and 10.2Gbps rate.

RCA audio interface
(paperless conference system, ultra-thin one lift) desktop socket audio interface
RCA audio is also called dual audio interface, left and right and left and right interfaces. It is the most common connection method to transmit audio signals by cable.
The RCA connector is often referred to as the Lotus Head. The use of RCA cables to transmit analog signals is currently the most common audio connection. Each RCA cable is responsible for transmitting the audio signal of one channel, so a stereo signal requires a pair of cables. For multi-channel systems, the same number of cables are required depending on the actual number of channels. Stereo RCA audio interface, generally the right channel is marked in red, and the left channel is marked in blue or white.
VGA video interface
Desktop socket VGA video interface
VGA (VideoGraphic Array) interface, that is, video graphics array, also called D-Sub interface, is a 15-pin trapezoidal plug, divided into 3 rows, 5 per row, transmitting analog signals. The VGA interface adopts an asymmetrically distributed 15-pin connection method. The working principle is that the image (frame) signal stored in the digital format in the display memory is analog-modulated into an analog high-frequency signal in the RAMDAC, and then output to the display device for imaging. It transmits red, green, and blue analog signals as well as sync signals (horizontal and vertical signals).
Card interface
Desktop socket card interface
The cassette interface has a three-pin plug and a locking device. Thanks to the locking device, the Canon connection is quite secure. The Canon interface is usually seen on devices such as microphones and audio conferencing systems, but it is not necessarily a balanced interface, because the transmission implementation of the balanced interface is more complicated and the requirements on the circuit are higher.
3.5 audio interface
Desktop socket 3.5 audio interface
3.5 Audio This is the most important sound card interface we have seen so far. Most consumer sound cards (including onboard sound cards) use this type of interface.
Provides stereo input and output functions, so generally speaking, 5.1 sound card (6-channel) or speaker, (paperless conference system, ultra-thin one lift) requires three 3.5mm stereo interfaces to connect Analog speakers (3 x 2 channels = 6 channels).