generate questions: Colour broadcasts started at similarly higher resolutions, first with the US NTSC color system in 1953, which was compatible with the earlier monochrome systems and therefore had the same 525 lines of resolution. European standards did not follow until the 1960s, when the PAL and SECAM color systems were added to the monochrome 625 line broadcasts.
What year did color broadcasts start in the US? {sep_token} How many lines of resolution did the US NTSC color system have in 1953? {sep_token} When did Europe begin color broadcasts? {sep_token} The PAL and SECAM were color systems where? {sep_token} How many lines of resolution were the European monochrome broadcasts?