CREATE TABLE table_18994 ("Abbr." TEXT, "Name" TEXT, "Picture Coding Types" TEXT, "Chroma Format" TEXT, "Aspect Ratios" TEXT, "Scalable modes" TEXT, "Intra DC Precision" TEXT)

how many chroma format with name being high profile
SELECT COUNT("Chroma Format") FROM table_18994 WHERE "Name" = 'High profile'
SELECT COUNT("Chroma Format") FROM "table_18994" WHERE "Name" = 'High profile'