The two corporate sides headed by Sony Corp. and Toshiba Corp. remain bogged down in a battle over a unified standard for next-generation DVDs, with no sign of yielding.

Sony and Matsushita Electric Industrial Co. are leading a group promoting Blu-ray discs for next-generation DVDs, while Toshiba and NEC Corp. are supporting the HD-DVD format.

If the battle is prolonged, it could have a negative impact on the spread of next-generation DVDs.