852 resultados para Television.
Resumo:
We discuss some fundamental characteristics of a phase-modulating device suitable to holographically project a monochrome video frame with 1280 x 720 resolution. The phase-modulating device is expected to be a liquid crystal over silicon chip with silicon area similar to that of commercial devices. Its basic characteristics, such as number of pixels, bits per pixel, and pixel dimensions, are optimized in terms of image quality and optical efficiency. Estimates of the image quality are made from the noise levels and contrast, while efficiency is calculated by considering the beam apodization, device dead space, diffraction losses, and the sinc envelope.
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The wideband high-linearity mixers for a double conversion cable TV tuner is presented. The up-conversion mixer converts the input signal from 100MHz to 1000 MHz to the intermediate frequency (IF) of I GHz above. And the down-conversion mixer converts the frequency back. The degeneration resistors are used to Improve the linearity. The tuner is implemented in a 0.35 mu m SiGe technology. Input power at 1dB compression point can reach +14.23dBm. The lowest noise figure is 17.5dB. The two mixers consume 103mW under a supply voltage of 5 V.
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Byers, D., Peel, D., Thomas, D. (2007). Habit, aggregation and long memory: Evidence from television audience data. Applied Economics, 39 (3), 321-327. RAE2008
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Griffiths, M. (2005). Children drawing toy commercials: re-imagining television production features. Visual Communication. 4(1), pp.21-37. RAE2008
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Koven, M. (2007). Most Haunted and the Convergence of Traditional Belief and Popular Television. Folklore. 118(2), pp.183-202. RAE2008
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Sexton, J. (2008). From Art to Avant Garde? Television, Formalism and the Arts Documentary in 1960's Britain. In L. Mulvey and J. Sexton (Eds.), Experimental British Television (pp.89-105). Manchester: Manchester University Press. RAE2008
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Koven, M. (2003). Folklore Studies and Popular Film and Television: A Necessary Critical Survey. Journal of American Folklore. 116(460), pp.176-195. RAE2008
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Sexton, J. (2003). Telev?rit? Hits Britain: Documentary, Drama and the Growth of 16mm Filmmaking in British Television. Screen. 44(4), pp.429-444. RAE2008
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Medhurst, Jamie, 'Wales Television - Mammon's Television? ITV in Wales in the 1960's', Media History (2004) 10(2) pp.119-131 RAE2008