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SAA7151

Digital multistandard colour decoder with SCART interface (DMSD2-SCART)

Philips Electronics 

Philips Semiconductors

Digital multistandard colour decoder with

SCART interface (DMSD2-SCART)

handbook, full pagewidth

Product specification

SAA7151B

CUV4 10

CUV5 11

CUV6 12

CUV7 13

CVBS0 14

CVBS1 15

CVBS2 16

CVBS3 17

VDD2 18

VSS1 19

CVBS4 20

CVBS5 21

CVBS6 22

CVBS7 23

GPSW1 24

GPSW2 25

HCL 26

SAA7151A

SAA7151B

60 UV2

59 UV3

58 UV4

57 UV5

56 UV6

55 UV7

54 Y0

53 Y1

52 VDD4

51 VSS3

50 Y2

49 Y3

48 Y4

47 Y5

46 Y6

45 Y7

44 CPI

MEH293

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

System configuration

The SAA7151B system processes digital TV signals with

line-locked clock in PAL, SECAM and NTSC standards

(CVBS or S-Video) as well as RGB signals coming from a

SCART/peri-TV connector. The different source signals

are switched, if necessary matrixed and converted (Fig.3

and Table 1).

8-bit CVBS data (digitized composite video) and 8-bit UV

data (digitized chrominance and /or time-multiplexed

colour-difference signals) are fed to the SAA7151B. The

data rate is 27 MHz.

Chrominance processing

The 8-bit chrominance input signal (signal “C” out of CVBS

or Y/C in Fig.4) is fed via the input interface to a bandpass

filter for eliminating the DC component, then to the

quadrature demodulator. Subcarrier signals from the local

oscillator (DTO1) with 90 degree phase shift are applied to

its multiplier inputs. The frequency depends on set TV

standard.

April 1993

6

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