The backers of the Blu-ray high definition DVD system are predicting victory in the format wars with HD DVD.

The two rival camps have divided consumers since the two incompatible systems were launched.

But Blu-ray supporters are touting the decision by Warner Bros to shift allegiance as a tipping point.

Andy Parsons, of the Blu-ray Disc Association, said: "It’s much clearer to consumers now which of the formats is going to prevail."

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