SAN FRANCISCO, Nov. 11 — Intel plans to announce a family of microprocessor chips on Monday that it says will speed the availability of high-definition video via the Internet.

Sean Maloney, Intel’s chief sales and marketing officer, said last week that the chips’ increased computing power would begin the transformation of today’s stuttering and blurry videos, the staple of YouTube and other video streaming sites, into high-resolution, full-screen quality that will begin to compete with the living room HDTV...