Originating from storied skunkworks at BBC R&D, a reliable mechanism for synchronisation existed only as an idea with a detailed specification, looking for a manufacturer.
The company that was Vistek Electronics Limited took up manufacturing challenge, which eventually gave birth to Vistek “Valid”, a test signal generator and counterpart reader that together comprised a device that provided a background test-pattern, user selectable captions, black timing flash and other tools for video signals, plus audio tones output from a selected audio option.
Valid proved to be popular but two people at the time, one of whom had been central to developing Valid, had bigger ideas. Those two are today Hitomi Directors - James Robinson and Russell Johnson - who jointly devised what proved to be a highly tantalising new product.