What is coaxial output

Coaxial digital Audio Interface output

Coaxial output is (sony/philips Digital inte rface) Sony, Philips home Digital audio interface abbreviation, can transmit LPCM stream and Dolby Digital, DTS such as surround sound compressed audio signal. SPDIF from the transmission medium is divided into coaxial and optical fiber two, in fact, they can transmit the same signal, but the carrier is different, interface and the appearance of the line also have differences. However, optical signal transmission is a popular trend in the future, its main advantage is not to consider the interface level and impedance problem, the interface is flexible and anti-interference ability is stronger.

The coaxial SPDIF is generally called the coaxial input and is coaxial on the back panel of the equipment. The coaxial cable with impedance 75ω is used as the transmission medium for the digital coaxial interface, its advantages are constant impedance, wide transmission band and high quality coaxial cable bandwidth up to hundreds of MHz. The base error of digital coaxial transmission is very small, so the transmission mode has a good performance on sound quality. However, please pay attention to the transmission wire impedance matching, and 75ω coaxial cable, to ensure constant impedance, to ensure that the signal transmission is correct. In other words, in the transmission of wire matching, should be suitable for the transmission of high-frequency digital signal 75 ohm coaxial wire as a standard, that is commonly known as the "digital line." Generally, the coaxial terminal output is similar to the audio quality of the fiber output. Therefore, some DVD players only set the digital coaxial output and save the fiber output function.

Coaxial Audio Interface

Coaxial audio Interface (Coaxial), the standard for the SPDIF (sony/philips Digital InterFace), was developed by Sony and Philips, in the audio-visual equipment on the back panel has Coaxial marking, mainly to provide digital audio signal transmission. Its joints are divided into RCA and BNC two kinds.

Coaxial audio is an audio interface with an input and output function, different from the previous audio interface, which integrates the interface of the microphone (input interface) with the interface of the headset or audio (output interface).

The

Digital coaxial (Digital Coaxial) is an interface that uses the S/PDIF interface to output digital audio. Coaxial cable has two concentric conductors, and the conductor and shielding layer share the same axis. The coaxial cable is a copper conductor insulated from insulating material, with an impedance of 75 ohms, and a second layer of annular conductor and its insulator outside the inner insulating material, and the entire cable is covered by PVC or Teflon material. The advantage of coaxial cable is that the impedance is stable, the transmission bandwidth is high, and the quality of audio is ensured. Although the coaxial digital cable of the standard connectors for BNC connectors, but the market on the coaxial digital wire more use RCA connectors.