SAA7114H Datasheet, PDF(32/140 Page) NXP Semiconductors – PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC combfilter, VBI-data slicer and high performance scaler

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SAA7114H Datasheet, PDF (32/140 Pages) NXP Semiconductors – PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC combfilter, VBI-data slicer and high performance scaler

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Philips Semiconductors

Preliminary speciï¬cation

PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC

comb ï¬lter, VBI-data slicer and high performance scaler

SAA7114H

8.2 Decoder output formatter

The output interface block of the decoder part contains the

ITU 656 formatter for the expansion port data output

XPD7 to XPD0 (for a detailed description see

Section 9.4.1) and the control circuit for the signals

needed for the internal paths to the scaler and data slicer

part. It also controls the selection of the reference signals

for the RT port (RTCO, RTS0 and RTS1) and the

expansion port (XRH, XRV and XDQ).

The generation of the decoder data type control signals

SET_RAW and SET VBI is also done within this block.

These signals are decoded from the requested data type

for the scaler input and/or the data slicer, selectable by the

control registers LCR2 to LCR24 (see also Chapter 15

âI2C-bus descriptionâ, subaddresses 41H to 57H).

For each LCR value from 2 to 23 the data type can be

programmed individually. LCR2 to LCR23 refer to line

numbers. The selection in LCR24 values is valid for the

rest of the corresponding field. The upper nibble contains

the value for field 1 (odd), the lower nibble for field 2

(even). The relationship between LCR values and line

numbers can be adjusted via VOFF8 to VOFF0, located in

subaddresses 5BH (bit 4) and 5AH (bits 7 to 0) and FOFF

subaddress 5BH (bit D7). The recommended values are

VOFF[8:0] = 03H for 50 Hz sources (with FOFF = 0) and

VOFF[8:0] = 06H for 60 Hz sources (with FOFF = 1), to

accommodate line number conventions as used for PAL,

SECAM and NTSC standards; see Tables 4 to 7.

Table 3 Data formats at decoder output

DATA TYPE NUMBER

DATA TYPE

teletext EuroWST, CCST

European closed caption

Video Programming Service (VPS)

Wide screen signalling bits

US teletext (WST)

US closed caption (line 21)

video component signal, VBI region

CVBS data

teletext

VITC/EBU time codes (Europe)

VITC/SMPTE time codes (USA)

reserved

US NABTS

MOJI (Japanese)

Japanese format switch (L20/22)

video component signal, active video region

DECODER OUTPUT DATA FORMAT

raw

YUV 4 : 2 : 2

raw

YUV 4 : 2 : 2

2000 Mar 15

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