Showing papers on "Channel (digital image) published in 1974"
TL;DR: In this article, the imaging capability of spatially distinct and independent sub-channels in holography has been experimentally investigated, and it is shown that images synthesized from sub-channel images may, under certain conditions, be comparable to full channel images, and that, when it is not so, the synthesized images may still be useful.
5 citations
Patent•
29 Apr 1974TL;DR: In this paper, a phase shifter generates two demodulation axis signals, having fixed phases with respect to received burst, which are coupled to a chroma demodulator to develop demodulated color output signals.
Abstract: In a color television receiver, a chroma channel includes a fleshtone detector which generates a correction signal when the received chroma signal is within the fleshtone region of the color vector diagram. A phase shifter generates two demodulation axis signals, having fixed phases with respect to received burst, which are coupled to a chroma demodulator to develop demodulated color output signals. In response to the correction signal, a semiconductor switch couples reactive impedances in circuit with the phase shifter to open the demodulation axes in order to emphasis fleshtone hues. The fleshtone detector, in one embodiment, includes a pair of transistors respectively coupled to the chroma amplifier and the reference oscillator, and connected to form a synchronous demodulator. In another embodiment, the fleshtone detector comprises a resistor and inverter matrix for combining selected color difference signals, from the output of the chroma demodulator, to indicate when the received chroma signal is in the fleshtone region of the color vector diagram.
1 citations