Hardware Video Encoders and Decoders


I need to broadcast video, fairly high quality, line-of-sight. The basic idea is to broadcast an encoded signal over a 5.7GHz link using some Motorola Canopy gear. In February when I needed to do this, I hired a company who used hardware encoders and decoders from a company called Integral Systems Design, but I can't find them in Google. Any one know of this company or similar boxes? I'd love to pick some up on eBay or something so I can avoid the ongoing cost of renting.