IPfocus HD-KVM (Keyboard Video Mouse) over IP LAN or WAN.
As more PC content is being used in addition to video from CCTV cameras a method to send this content over a LAN or WAN is required. IP cameras and video servers provide a solution using H264 compression. However PC content provides some unique challenges in streaming this content over a LAN or the Internet.
Firstly PC content is output via VGA or DVI connectors in an RGB format compared to YCbCr/YPbPr used in most IP cameras. Secondly the output is typically at 60Hz or 60 fps and may support resolutions of 1280 x 1024 or even 1920 x1080.
This requires a codec capable of 1920 x1080 at 60 fps that supports RGB.
The final issue in streaming PC content over IP is how to control the remote PC?
Historically KVM systems (keyboard video mouse) have allowed PCs to send the RGB signal over long distances and offer an ability for the Keyboard and Mouse signals to be sent back in the opposite direction. These systems use coaxial cable or twisted pairs and do not support LAN or WAN in general. The reasons LAN/WAN is not supported relate to the
uncompressed RGB signal requiring very high bandwidths. Secondly the latency from the decode to encode end must be very short to allow use of the mouse without noticeable lag.
So to stream PC content over a LAN or WAN we need low bandwidth of no more than 10-20 MBits/second in practice plus a latency (delay) from Keyboard and Mouse over the LAN to the PC of around 20-30mS ideally.
A solution to encoding PC content is supported by a few codecs on the market but the issue is that of latency. These codecs or video servers have latencies from encode to decode typically 200mS. Secondly they do not offer a back channel capable of supporting the USB signals from a Keyboard and Mouse.
Antricas new ANT-5000 series of encoders and decoders offer a solution to the KVM over IP
dilemma. Firstly latency for the video path is under 30mS from HDMI input (encoder) to HDMI output (decoder). Secondly the ANT5000 codecs offer a virtual USB pipe between the decoder and encoder with latency below 30mS. This allows a Keyboard and Mouse to be plugged into the Decoder unit and the encoder replicates these USB signals at the Encoder/PC end. The Decoder supports a USB hub feature (master) whilst the Encoder has a USB output (slave).
Applications include streaming PC content to video walls , Medical scanner outputs streamed to remote locations, secure locations for PC blades with remote KVM stations.
View this product at IP-in-Action LIVE Oxford Register:
www.ip-in-action-live.com
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