Question

Image resolution in a television system can be improved by which of the following?

1. increased bandwidth
2. reduced number of scan lines
3. increased number of scan lines
4. decreased bandwidth

Answer 1

Television image resolution can be improved by increasing bandwidth and the number of scan lines, both of which contribute to a clearer and more detailed picture.

Step-by-step explanation:

The resolution of a television system relates to the number of pixels or dots that make up the image on the screen. Improved image resolution can be achieved by the following:

• Increased bandwidth: More bandwidth allows for more data to be transmitted, which can include higher resolution imagery.
• Increased number of scan lines: More scan lines mean more detail can be displayed, resulting in a clearer picture.

Options 2 and 4, which suggest reducing the number of scan lines and decreasing the bandwidth, would lead to a lower resolution and thus a poorer quality image. It is also important to understand that in an LCD television, each pixel is composed of sub-pixels with red, blue, or green filters, and manipulating the voltage across the liquid crystals in these pixels controls the passage of light and the image contrast.