Authorities claimed during a hearing Wednesday they now have a better idea when singer R. Kelly (search) allegedly was videotaped engaging in sex acts with an underage girl.

Cook County (search) prosecutors now say the tape was made between Jan. 1, 1998, and Nov. 1, 2000. They said they reinterviewed some witnesses and re-examined the videotape, which included commercials playing on a television in the background, to come up with the new time span.

Defense attorneys had objected to prosecutors' original claim that the crime took place sometime between November 1997 and February 2002, saying that was too vague. Judge Vincent Gaughan (search) agreed earlier this month and ordered Wednesday's hearing on the issue.

Kelly defense attorney Ed Genson said he was unsatisfied with prosecutors' amended indictment.

"We want a reduction to two days," Genson said outside court.

Kelly, whose first name is Robert, attended a hearing on the matter but did not speak with reporters. He has pleaded innocent to 14 counts of child pornography.

Gaughan continued the hearing until July 27.