HDMI:
HDMI is defined as a high-definition multimedia interface, which is a digital video/audio interface technology that can transmit uncompressed high-definition video and multi-channel audio. At the same time, there is no need to perform digital/analog and analog/digital conversion before signal transmission to ensure lossless transmission of audiovisual signals. Some people in the industry have said that HDMI is currently the best quality audio and video transmission solution.
HDMI interface on AV amplifier
In high-end audio and video equipment, HDMI connection is provided. It uses pure digital transmission technology and transmits signals through TMDS. It can support 1080P (or 4K) resolution and 7.1 channel audio signal output at the same time; as well as Dolby TrueHD, DTS HD Master Audio audio encoding, etc. (Note: These audio formats cannot be transmitted on fiber optic cables). The HDMI connection is also very simple, and only a single cable can transmit high-quality video and audio signals at the same time. So to put it simply, if you want to transmit all the content through one cable, then HDMI is your best choice.
However, because HDMI has a very strict authorization and use agreement, as well as high authorization fees, its popularity in China’s electronic products has also been greatly affected. Therefore, we usually only see the HDMI interface on some mid-to-high-end audio-visual equipment, and the penetration rate is lower than that of the optical interface. At the beginning of this month, HDMI officially announced that it has reached a strategic cooperation with the China Electronics Video Industry Association, which will vigorously promote the application and development of HDMI technology in the Chinese electronics market. Maybe next year, we will be able to see the HDMI interface on more consumer audio-visual equipment.
Advantages: One line can complete high-definition video, multi-channel audio transmission, and lossless music transmission
Disadvantages: low interface penetration rate, old equipment does not support, and genuine HDMI cables are more expensive
Summarize:
Today we introduced the advantages and disadvantages of the three transmission methods of Bluetooth, optical fiber, and HDMI, as well as the better listening experience they bring. However, the author wants to confirm a point in the end. Although Bluetooth is more convenient and optical fiber and HDMI can transmit better sound quality, we need a certain quality of sound source, speakers and power amplifier equipment to play its role. But if you just want to rely solely on cables to improve the quality of audio and video, the effect may not be obvious.