| 单词 | picture black |
| 释义 | > as lemmaspicture black picture black n. Television the light level of the darkest element of a television 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 1938 Jrnl. Inst. Electr. Engineers 83 770/1 The insertion of the d.c. component into a train of picture signals implies that the signal corresponding to picture black is established at a definite potential. 1961 G. Millerson Technique Television Production iii. 51 Picture black may not be constant. The darkness of the blackest tones in the picture may vary from shot to shot, with picture content. 1972 G. J. King Beginner's Guide Television (ed. 5) ii. 43 In television parlance, below-picture black level is called blacker than black. < as lemmas |
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