| 摘要 |
<p>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 (44) having a line resolution suitable for high definition scanning. The lower definition color components are obtained from three low resolution linear array sensors (36r, 36g, 36b) producing unsharp red, green and blue signals. The luminance array is divided into like-sized segments (44a, 44b, 44c, 44d); multiple registers (48a, 48b, 48c, 48d) are then used to reach the data rate required for high definition scanning. The color photosites are larger 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 (42) is used to read out all the linear arrays. Plural lines of luminance are thus output for each line of color, thus yielding lower resolution in the vertical as well as the horizontal scanning direction.</p> |
