Fiber optic communication in audio and video transmission

Fiber optic communication in audio and video transmission

Fiber optic communication plays a key role in audio and video transmission, especially in high-resolution, long-distance and complex environment application scenarios, its high bandwidth, low latency and anti-jamming ability is significantly better than the traditional transmission methods.

Technical principles

• Electro-optical conversion: audio and video signals (e.g. HDMI, SDI) are converted to optical signals through fiber optic transceivers, and transmitted to the receiving end via fiber optics.
• Optical and electrical reduction: the receiving end reduces the optical signals to electrical signals to drive the controller of the LED display (e.g. transmitter card).
• Protocol Support: Supports high-bandwidth protocols such as HDMI 2.1 (4K@120Hz) and 12G-SDI (uncompressed video).

Application scenarios

• Large-scale performance and stage display

Requirements: 4K/8K UHD video transmission in real time, audio synchronization error <1ms.

Solution: The main console transmits ProRes/H.265 encoded video to the LED screens on both sides of the stage via fiber optics, with Dante fiber optic audio network to achieve accurate synchronization of sound and picture.

• Stadium and outdoor advertising

Requirements: ultra-long distance transmission (100m~20km), anti-electromagnetic interference (such as high-voltage lines, thunderstorms).

Solution: using single-mode fiber + optical transceiver to transmit signals from the control room to the off-site advertising screen, supporting HDR 10bit color depth.

• Traffic command center and security monitoring

Requirements: centralized display of multiple video signals, 7×24 hours stable operation.

Solution: Fiber optic KVM matrix switcher connects multiple monitoring terminals, distributes video to LED splicing screen, supports millisecond switching.