†(a) (the frequency of) a picture signal; (b) the number of times per second that a complete television image is scanned or transmitted.
| 单词 | θ197367 |
| 释义 | society > communication > broadcasting > television > visual element > [noun] > signals, types, or parts of (12) picture frequency1926 †(a) (the frequency of) a picture signal; (b) the number of times per second that a complete television image is scanned or transmitted. picture signal1927 the component of the video signal which carries the information relating to the brightness of individual pixels. black level1935 the level of the picture signal that corresponds to black in the transmitted picture. line frequency1936 the number of scanning lines produced per second. pedestal1937 Television. The level of the video signal voltage during line blanking; (also) this part of the signal. line scan1938 (a) the motion of a scanning beam or spot along a line; (b) the electrical signal which causes this; (c) an apparatus or technique which scans an… picture black1938 the light level of the darkest element of a television picture. white level1938 the signal level corresponding to the maximum brightness on a television screen, computer monitor, etc. porch1941 Television. In a video signal: either of the two periods of line blanking immediately before and after the line-synchronizing pulse (in full front… test signal1945 a sequence of electrical impulses used for testing purposes in television broadcasting. spot wobble1950 a small periodic oscillation of the scanning spot in a cathode ray tube television, formerly used to render the scanning lines less noticeable. luminance1953 Television. The component of a television signal which carries information on the brightness of the image. Also luminance signal. Cf. chrominance, n. |
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