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| 型號： | SAA6752HS |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| 中文描述： | MPEG - 2視頻和MPEG-audio/AC-3音頻編碼器與復用器 |
| 文件頁數(shù)： | 18/71頁 |
| 文件大小： | 2570K |
| 代理商： | SAA6752HS |
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2004 Jan 26
18
Philips Semiconductors
Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
Table 2
Format conversion
Notes
1.
The 8 pixels at the right edge of the scaled picture are
not encoded.
Top field only.
2.
7.2.6
V
IDEO FILTERING
7.2.6.1
Adaptive mean filter
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
beoverwrittenviatheI
2
C-bustoallowuseroptimizationfor
different applications.
7.2.6.2
Horizontal pre-filter/decimation filter
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
2
C-bus.
7.2.6.3
Vertical chrominance filtering
For 4 : 2 : 2 to 4 : 2 : 0 conversion, vertical filtering and
subsampling of the chrominance is performed. The
sequenceofcoefficientsismirroredintopandbottomfield.
This generates the right phases of the chrominance
samples between the luminance samples (a non co-sited
sampling scheme).
7.2.7
VBI
DATA EXTRACTION
The SAA6752HS supports the extraction of WSS and CC
data using two independent VBI data extractor modules.
The data is available via the I
2
C-bus.
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
2
C-bus.
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
2
C-bus.
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
Video compression
7.3.1
G
ENERAL
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.
MODE
PICTURE FORMAT
(PIXEL/LINES)
D1
2/3D1
1/2D1
SIF
720
480
352; note 1
352; notes 1 and 2
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SAA6752HS/V103 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| SAA6752HS/V103,557 | 功能描述:IC AUD/VID ENCODER MPEG 208-SQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉換器 系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器 應用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應商設備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| SAA6752HS/V104 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| SAA6752HS/V104,557 | 功能描述:IC AUD/VID ENCODER MPEG 208-SQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉換器 系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器 應用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應商設備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| SAA7000 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CD機插補靜音器 |
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