How is this memory needed calculated ?

[Jack// ani]

How is this calculated?

Q. If there are 1024*1280 pixels on a screen and each pixel can have around 16 million colors. Find the memory required for this?

Ans. 4MB

How is this calculated?

 

[papyaki]

Re: How is this calculated?

Hi,

16 million colors per pixel means 24bits (2^24 = 16777216) or 3 bytes per pixel. A 1024 x 1280 pixels screen means 1310720 pixels.

The needed memory to store such a screen is 1310720 pixels x 3 bytes = 3932160 bytes, not far from 4Mbytes.

 

[bunalmis]

Re: How is this calculated?

log(16e6)/log(2)=23.9 24 Bit need for 16 million color (3 Byte)

1024 * 1280 * 3 = 3932160 Byte = 3.75 Mbyte

 

[e_eja]

Re: How is this calculated?

if i have such deep colour scale now how we implement such that it can see on screen, crt , lcd and soon is there needed dac t implement

 

[pahol]

Re: How is this calculated?

The above is correct calculation. But please take care about real system implementation. If you implement on 32-bit system, and do you want high performance ? Because 32-bit system can work with 32-bit data for read/write. 3-byte (24-bit) operation may difficult and reduce performance. So you may use 4-byte (32-bit) for 1 pixel, That means 1024*1280*4 = 5 MB.

 

[bunalmis]

Re: How is this calculated?

Use 5Mbyt address space and 4Mbyte RAM.