Eastman-kodak Company

Roger T Lees

John D Millward

Richard A Sharman

Ronald W Mumford, Deceased

Walter R Godden

A film scanner operable according to dual line standards includes red, green, and blue linear array sensors separated by a line spacing that constitutes substantially integral first and second multiples of the line spacings of the respective line standards. More particularly, in 1125 and 1250 line television standards, the linear arrays are spaced such that the distance is substantially equivalent to 9 lines of the 1125 line standard and 10 lines of the 1250 line standard. The output signal from each linear array is registered to the same line for each standard by inserting separable sets of line delays into the signal paths from two of the linear arrays. The separable delays correspond to the first and second multiples of the respective standards. By switching between the respective sets of delays, an output signal is developed for a selected line standard.

Linear film scanner operable at different line rates

A motion picture film scanner generates a high definition television signal from the combination of a high definition detail component and a plurality of lower definition color components. The detail component is obtained from a luminance signal generated by a linear array sensor having a line resolution suitable for high definition scanning. The lower definition color components are obtained from three low resolution linear array sensors producing unsharp red, green and blue signals. The luminance array is divided into like-sized segments; multiple registers are then used to reach the data rate required for high definition scanning. The color photosites are large than the luminance photosites for improved signal-to-noise performance. By further selecting the number of photosites in each luminance segment to be a submultiple of the number of photosites in a color array, a common clock signal is used to read out all the linear arrays. Plural lines of luminance are thus output for each line of color, thus yielding lower color resolution in the vertical as well as the horizontal scanning direction.

Method and apparatus for generating a high definition electronic signal

Film scanner with improved response to scattered light

The output delivered by a transducer having an integral power law transfer characteristic is stabilized by controlling output signal components related to the operating bias and gain of the transducer circuit. A test input signal comprising a sine-wave is applied to the transducer. The fundamental and integral harmonic components are filtered from the resulting output signal. The transducer is stabilized by restoring in sequence the amplitude of the harmonic and fundamental components to predetermined values respectively related to desired operating gain and bias conditions. A typical transducer is a cathode ray tube.

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Rickmansworth, United Kingdom

Roger T Lees