Camelot Corp applied for a patent for a video and audio communications system for the Internet called VideoTalk. The hardware and software system allows for full duplex video and audio conferencing over the Internet using direct dial, the company said. Development of the system should be completed by the end of the year. It will come with a new version of the Digiphone 2.0 software. Camelot said it has not established a retail price yet for the new system.