LOS ANGELES, Aug. 20 — Hollywood’s squabble over which of two technologies will replace standard DVDs reignited Monday with two studios throwing their weight behind one format and several rivals ramping up support for the other.

Paramount, part of Viacom, and the publicly held DreamWorks Animation said they would exclusively back the HD DVD format for the release of high-definition movies on disc. Among the movies the studios plan to release in the format are “Transformers” and “Shrek the Third.”

Until now, Paramount has released titles in both HD DVD and a competing format, Blu-ray. DreamWorks Animation has not released a movie in either.

The battle over the competing high-definition DVD technologies has sputtered in recent months as Blu-ray discs have emerged as the front-runner. Blu-ray titles are sharply outselling HD offerings, major retailers like Target are stocking only Blu-ray players, and Blockbuster recently said it would carry Blu-ray exclusively.