VPC3233D 데이터 시트보기 (PDF) - Micronas

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VPC3233D

Comb Filter Video Processor

Micronas 

PRELIMINARY DATA SHEET

VPC 323xD

– Both the length and the number of active video lines

varies with the selected window parameters. For

compliance with the ITU-R656 recommendation, a

size of 720 samples per line must be selected for

each window.

– During blanked video lines SAV/EAV headers are

suppressed in pairs. To assure vertical sync detec-

tion the V-flag in the EAV header of the last active

video line is set to 1. Additionally, during field blank-

ing all SAV/EAV headers (with the V-flag set to 1)

are inserted.

Table 2–6: Coding of the SAV/EAV-header

Bit No.

Word MSB

LSB

76543210

First

1

1

1

1

1

1

1

1

Second 0

0

0

0

0

0

0

0

Third

0

0

0

0

0

0

0

0

Fourth

T

F

V H P3 P2 P1 P0

F = 0 during field 1,F = 1 during field 2

V = 0 during active linesV = 1 during vertical field blanking

H = 0 in SAV,H = 1 in EAV

T = 1 (video task only)

The bits P0, P1, P2, and P3 are Hamming-coded pro-

tection bits.

dependent on window size

Digital

Video

Output

AVO

1728 samples

constant during

horizontal blanking

Y=10hex; CR=CB=80hex

CB Y CR Y ...

CB Y CR Y ...

SAV: ”start of active video” header

EAV: ”end of active video” header

Fig. 2–14: Output of video data with embedded reference headers (@27 MHz)

Y DATA 80h 10h SAV1 SAV2 SAV3 SAV4 CB1

Y1

CR1

Y2 CBn-1 Yn-1 CRn-1 Yn EAV1 EAV2 EAV3 EAV4 80h 10h

AVO

LLC1

LLC2

Fig. 2–15: Detailed data output (double-clock on)

Micronas

19

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