Before revision: In 1949 France introduced an even higher-resolution standard at 819 lines, a system that should have been high definition even by today's standards, but was monochrome only and the technical limitations of the time prevented it from achieving the definition of which it should have been capable .
After revision: In 1949 France introduced an even higher-resolution standard at 819 lines, a system that would have been high definition even by modern standards, but was monochrome only and had technical limitations that prevented it from achieving the intended definition .