PROCEEDINGS ARTICLE | February 27, 2013
Proc. SPIE. 8630, Optoelectronic Interconnects XIII
KEYWORDS: Transceivers, Transmitters, Clocks, Fiber optics, Video, Interfaces, Receivers, Control systems, Video compression, Analog electronics
Remote transfer of high-resolution video information finds more applications in detached display applications for large
facilities such as theaters, sports complex, airports, and security facilities. Active optical cables (AOCs) provide a
promising approach for enhancing both the transmittable resolution and distance that standard copper-based cables
cannot reach. In addition to the standard digital formats such as HDMI, the high-resolution, long-distance transfer of
VGA format signals is important for applications where high-resolution analog video ports should be also supported,
such as military/defense applications and high-resolution video camera links. In this presentation we present the
development of a compressionless, high-resolution (up to WUXGA, 1920x1200), long-distance (up to 2 km) VGA
extenders based on serialized technique. We employed asynchronous serial transmission and clock regeneration
techniques, which enables lower cost implementation of VGA extenders by removing the necessity for clock
transmission and large memory at the receiver. Two 3.125-Gbps transceivers are used in parallel to meet the required
maximum video data rate of 6.25 Gbps. As the data are transmitted asynchronously, 24-bit pixel clock time stamp is
employed to regenerate video pixel clock accurately at the receiver side. In parallel to the video information, stereo audio
and RS-232 control signals are transmitted as well.
