Comcast intends to continue expanding Internet and high-definition video services to meet consumer demand amid growing competition, the Fortune 100 company’s chief executive said Saturday.

“Competition, as long as it’s fair, is something that pushes you to innovate faster, get better service and have more value,” Brian L. Roberts, chairman and CEO of Comcast Corp., said during a visit to Chattanooga.

Mr. Roberts visited Chattanooga today to meet about 350 volunteers who were preparing to clean South Chickamauga Creek behind the Brainerd Wal-Mart. The cleanup was part of a nationwide initiative called Comcast Cares Day, in which more than 50,000 Comcast workers, family members and volunteers performed public service.

Mr. Roberts also presented a $25,000 check to Charlie Arant, the Tennessee Aquarium’s president. Mr. Arant said the funds would allow every fifth-grader in Hamilton County to travel on the River Gorge Explorer.

Starting this summer, EPB will square off against Comcast and satellite companies in offering video, high-speed Internet and telephone service to consumers. AT&T is expected to offer video and broadband Internet soon in Chattanooga as well.

To read more of Mr. Roberts’ comments on cable competition, see Sunday’s Times Free Press.