4. (4) Given an 8-bit grayscale bitmap that is 256 x 512, how many bytes will be

Question

4. (4) Given an 8-bit grayscale bitmap that is 256 x 512, how many bytes will be required to hold the image data only? If it is an 8-bit color bitmap? If it is a 24-bit bitmap?

5. (4) Given a mono wave file that is 8 bits per sample and is sampled at 16000 samples/second, how many bytes are required to hold the audio data if the message is 2 minutes long? Given a 16-bit stereo wave file?

(2) A 16-bit grayscale file has _____ levels of luminance.

(2) If an image has 4 bits for each RGB channel, how many different color combinations are possible?

Explanation / Answer

4. For 8 Bit Grayscale - 1 bytes per pixel, 8 bit color - upto 1 byte per pixel, 24 bit bitmap 3RGB value per pixel

5. 4 bit for each RGB channel have 48 color combination . 2^4 * 3 = 48

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