1 Color Space Mapping

Figure 1-1. Color Space Mapping

To support 24-bit RGB output (8 bits each for red, green, and blue) using an 8-bit parallel input, the adapter board implements a bit duplication scheme. Instead of transmitting a full 8-bit value for each color channel, the hardware replicates certain bits from the 8-bit input to populate the 24-bit RGB output. This simplifies the hardware design and maintains color continuity even with limited input data.

Bit Mapping Details:

  • Blue Channel (D0–D7): The system duplicates input bit D1 across the six most significant bits of the blue channel output.
  • Green Channel (D8–D15): The system duplicates input bit D4 across the five most significant bits of the green channel output.
  • Red Channel (D16–D23): The system duplicates input bit D7 across the five most significant bits of the red channel output.

Applications

  • Upgrade old images for modern displays.
  • Convert legacy graphics for use in new software.
  • Enhance image quality for printing or digital archiving.