935274109557 NXP Semiconductors, 935274109557 Datasheet - Page 18

• Manufacturer Part Number: 935274109557
• Manufacturer: NXP Semiconductors

Specifications of 935274109557

• Screening Level: Commercial
• Package Type: SQFP
• Pin Count: 208
• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
Table 2 Format conversion
Notes
1. The 8 pixels at the right edge of the scaled picture are
2. Top field only.
7.2.6
7.2.6.1
The SAA6752HS uses an adaptive mean filter. There are
three different filter modes that can be selected: median,
averaging or no filter.
The median algorithm provides better noise performance
and is well suited to suppress single noise spikes without
degrading the signal edges. The averaging algorithm is a
standard low-pass filter so has greater impact on signal
edges.
The default threshold and gain coefficients of this filter can
be overwritten via the I
different applications.
7.2.6.2
There is a horizontal filter for Y and C and this can operate
as a pre-filter or decimation filter. It is a symmetrical FIR
filter with up to 8 coefficients programmable via the
I
7.2.6.3
For 4 : 2 : 2 to 4 : 2 : 0 conversion, vertical filtering and
subsampling of the chrominance is performed. The
sequence of coefficients is mirrored in top and bottom field.
This generates the right phases of the chrominance
samples between the luminance samples (a non co-sited
sampling scheme).
2004 Jan 26
2
D1
2/3D1
1/2D1
SIF
C-bus.
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
not encoded.
V
IDEO FILTERING
MODE
Adaptive mean filter
Horizontal pre-filter/decimation filter
Vertical chrominance filtering
2
C-bus to allow user optimization for
720
480
352; note 1
352; notes 1 and 2
PICTURE FORMAT
(PIXEL/LINES)
18
7.2.7
The SAA6752HS supports the extraction of WSS and CC
data using two independent VBI data extractor modules.
The data is available via the I
The following VBI data formats are supported: Closed
Caption (CC525 and CC625) and Wide Screen Signalling
(WSS525 and WSS625). For CC525, CC625 and
WSS625 the sliced data from a video input processor (e.g.
SAA7114, SAA7115 or SAA7118) are extracted from the
digital video input signal and can be read via the I
For WSS525 an internal data slicer is available which
slices the oversampled raw data, which are delivered by
the video input processor. The extracted WSS525 signal
can be read via the I
Optionally the automatic insertion of extracted Closed
Caption data into the user data area of a video stream is
possible (for details see Section 7.3.8).
7.3
7.3.1
Compression of video data is performed by the video
compressor block; see Fig.4. The input to this block is the
uncompressed video information pre-processed by the
video front-end and stored in external SDRAM memory.
The output is a compressed video stream, compliant to
MPEG-2 Video Elementary Stream (VES) up to slice level.
Controlling information (for example, quantizer step size)
as well as the bit stream for higher layers of the VES is
generated by the embedded MIPS processor of the
SAA6752HS.
The video compressor contains several subblocks. The
MacroBlock Processor (MBP) performs generation of
video ES on macroblock level. Controlling parameters for
this task and MB headers as well as slice headers are
generated by the core control subblock. Bitstream
formatting and concatenation of MBP bitstream and
header information is done by the subblocks pre-packer
and packer.
Video compression
VBI
G
ENERAL
DATA EXTRACTION
2
C-bus.
2
C-bus.
SAA6752HS
Product specification
2
C-bus.