SDA9401 Datasheet, PDF (34/69 Pages) List of Unclassifed Manufacturers – Scan Rate Converter using Embedded DRAM Technology Units

SDA 9401
6.5.3 Operation mode generator
The VOUT generator determines the VOUT signal. For proper operation of the VOUT generator
information about the raster sequence is necessary. The parameter STOPMODE (Static operation
mode) defines the raster sequence and the scan rate conversion algorithm. The figure below
explains the used wording for the following explanations.
Explanations of field and display raster
FRAME/FIELD
FRAME
FIELD A
odd lines
FIELD B
even lines
Content of picture
DISPLAY RASTER
TV
Display raster
odd lines
even lines
Display raster ∼
Display raster ϒ
Tube, Display raster
The interlaced input signal (e.g. 50 Hz PAL or 60 Hz NTSC) is composed of a field A (odd lines) and
a field B (even lines).
Aⁿ - Input signal, field A at time n,
Bⁿ - Input signal, field B at time n
The field information describes the picture content. The output signal, which could contain different
picture contents (e.g. field A, field B ) can be displayed with the display raster ∼ or ϒ.
(Aⁿ,∼) - Output signal, field A at time n, displayed as raster ∼Ι
Micronas
34
Preliminary Data Sheet