Abstract: A VTR editing system able to single frame edit (write to VTR) or capture (read from a VTR) multiple frames of video in a single pass of a video tape, through interleaving the actual frames that are accessed. The system comprises a control circuit which allows interleaving of frames during video edit and capture functions; a memory for storing multiple frames of video data, such as a PC hard disk or RAM; and a transfer circuit for transferring video data input and output, between the video recorder and the memory. The system further performs automatic calibration, system configuration detection, and synchronization signal loopback control, and it supports multiple device control through a single parallel or serial communications path.