SM5838AS datasheet(10/14 Pages) NPC

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SM5838AS

NIPPON PRECISION CIRCUITS—10

High-speed Conversion

For example, an NTSC signal interlace-to-noninter-

lace conversion. If interpolated line data can be

assumed to be similar to the preceding line data and

the write data rate is 14.3 MHz (4fSC), then conver-

sion can be realized by reading twice at 28.6 MHz

(8fSC).

Furthermore, interpolated line data, with appropriate

signal processing separation, can be read out line-by-

line by alternating between 2 SM5838AS devices (1

line/device).

In reality, however, double the number of devices are

required for luminance signal (Y) and color differ-

ence signal (C) systems. And triple the number of

devices are required for RGB signal systems.

Preceding line data used as interpolated line

Interpolated data used as interpolated line

*Output data 867 to 909 forms the preceding 1H data.

0123 45

01 2

909

nH+1H

012345

909

012345

909 *

012345

909 *

0 12345

909

nH-1H

nH+1H

CLK

DIN

DOUT

1819

0123 45

1819

01 2

909

nH'

nH'+1H

909

nH'-1H

nH'

CLK

(B)DIN

(A)RE

(A)OE

(A)RR

(B)DOUT

909

nH+1H

(A)DIN

012345

0 1 2 3 4 5

0 12345

nH+1H

012345

909 *

(A)DOUT

(B)RE

(B)OE

(B)RR

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