MFC2000 datasheet(227/426 Pages) ETC

227 / 426 page

Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

9-15

9.3

Resolution Conversion Programming Examples

Figure 9-4 is a flowchart that shows the procedure for determining the resolution conversion register values for

both expansion and reduction modes:

Expand or

Reduce ?

Expand

R e d u c e

Notes:

1) Input = Input Resolution (number of pixels/input line)

2) Output = Output Resolution (number of pixels/output line)

3) For expansion, Output < (4*Input)

4) For reduction, Output < Input

5) For best results in reduction , (Input-Output)/Input <= 1/3

Compute pixels to add per 2187 input pixels:

Int{[(Output-(m+1)*Input)/Input] * 2187 + 2/3}

m: expansion mode

Compute pixels to remove per 2187 input pixels:

Int{[(Output-Input)/Input] * 2187}

Represent pixels to add as a sum of numbers:

(3**n) and ( 2 * (3**n) ) where n=0, 1, ... 6

Represent pixels to remove as a sum of numbers:

(3**n) and (2 * (3**n)) where n = 0, 1, ...6

Fill in both registers according to sum and

Figure 9-4: Resolution Conversion Programming

The number of pixels to add in expansion mode is determined from the integer portion of:

Pixels to add per 2187 input pixels =

{[ (Output pixels per line - (m+1) * Input pixels per line)/input pixels per line ] * 2187 +2/3}

m: the expansion mode

Note:

2/3 is added in this equation in order to guarantee that the truncated result will be

greater than or equal to the desired number of output pixels per line.

The number of pixels to remove in reduction mode is determined from the integer portion of:

Pixels to remove per 2187 input pixels =

{[(Input pixels per line - Output pixels per line)/input pixels per line] * 2187}

Note:

For best results, the number of pixels removed (per 2187 pixels) in reduction mode

should be less than or equal to 729. {i.e., [(Input Pixels - Output pixels)/Input pixels] < = 1/3}

MFC2000 Datasheet(PDF) 227 Page - List of Unclassifed Manufacturers

MFC2000 Datasheet(HTML) 227 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL