The I1 Input module was designed to serve as a multi-standard video data input device. It is capable of digitizing RS-170A (RGB) or NTSC video using onboard logic, but also provides two digital inputs each providing 60 MBytes/s of bandwidth. These digital inputs (the Hoover Buses) may each connect to up to eight external video (and/or audio) interface modules, allowing additional or non-standard video interfaces to be used concurrent with the onboard digitizer. Each card may therefore be digitizing on up to seventeen sources simultaneously. Video digitized using onboard logic may be automatically deinterlaced, using a four tap median filter, to generate images (640 x 480) at 60 frames per second.
A timecode reader is provided, capable of decoding either linear timecode (LTC) encoded in an audio signal or vertical interval timecode (VITC) encoded onto the actual video signal. The I1 software interface allows for the grabbing of specific frames (or sets of frames) of video, indicated by their timecode. A closed caption reader is also incorporated, which decodes closed captioning and additional information encoded on the video signal.