On May 14 , 2007 , starting with the 5 p.m. newscast , WCVB began broadcasting its local newscasts in high definition .
The majority of the field reports remained in 4 .
On May 14 , 2007 , starting with the 5 p.m. newscast , WCVB began broadcasting its local newscasts in high definition , although the majority of the field reports remained in 4 .