LOS ANGELES – Warner Bros. Entertainment said Friday it will release movie discs only in the Blu-ray format, becoming the latest studio to reject the rival HD DVD technology and further complicating the high-definition landscape for consumers.

Warner Bros., owned by Time Warner Inc., was the only remaining studio releasing high-definition DVDs in both formats.

It is the fifth studio to back Blu-ray, developed by Sony Corp. Only two support the HD DVD format, developed by Toshiba Corp.

Both formats deliver crisp, clear high-definition pictures and sound. But they are incompatible with each other, and neither plays on older DVD players, which means consumers seeking top-quality playback face a dilemma.

Warner said it decided to go with Blu-ray because consumers have shown a stronger preference for that format than HD DVD.

“The window of opportunity for high-definition DVD could be missed if format confusion continues to linger,” Warner Bros. chairman and chief executive Barry Meyer said in a statement.

“We believe that exclusively distributing in Blu-ray will further the potential for mass market success and ultimately benefit retailers, producers and, most importantly, consumers,” the statement said.

The company said sales of Blu-ray discs in the U.S. generated $169 million last year, while sales of discs in the HD DVD format totaled $103 million.

About 60 percent of Warner’s sales of U.S. high-definition discs were Blu-ray titles and the other 40 percent were HD DVD, said Kevin Tsujihara, president of Warner Bros. Home Entertainment Group.