| 单词 | black level |
| 释义 | > as lemmasblack level black level n. Television the level of the picture signal that corresponds to black in the transmitted picture. ΘΚΠ society > communication > broadcasting > television > visual element > [noun] > signals, types, or parts of picture frequency1926 picture signal1927 black level1935 line frequency1936 pedestal1937 line scan1938 picture black1938 white level1938 porch1941 test signal1945 spot wobble1950 luminance1953 1935 Proc. IRE 23 1457 This provides a black-white ratio of at least 3 to 1 and a black level high enough to eliminate noise pickup troubles. 1982 J. Goldberg Fund. Television Servicing i. 5 Television standards identify a white level and a black level of picture information. 2002 Sound & Vision May 83/2 Both the black level and grayscale will drift as it warms up. < as lemmas |
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