Computer control for video cassette recorders

摘要

PC Add-On Card for controlling consumer grade VHS-VCR(s) comprising address decoding section and bidirectional buffer connected to I/O ports for interchanging data between computer and VHS-VCR(s) through digital switching control and to counter section for counting tape positioning pulses from the VHS-VCR(s) through analog multiplexer section. The digital switching control section and analog function switching control electronically control the functions of VHS-VCR(s) through the analog multiplexer section interactively. This Card may be used for integrating real time analog video from a built-in VHS-VCR and animation from the computer in Analog Video Interactive Equipment.