收藏本站

ADV7802
THEORY OF OPERATION
KEY FEATURES
Analog front-end features include
Data Sheet
The ADV7802 is a high quality, single-chip, multiformat 3D
comb filter video decoder and graphics digitizer. Key features
of the device include
?
?
Four 150 MHz, NSV, 12-bit ADCs that enable true 12-bit
video decoding
12-channel analog input mux that enables multiple source
?
Four noise shaped video (NSV?) 12-bit ADCs
connections without the requirement of an external mux
?
?
?
?
?
?
?
NTSC/PAL/SECAM video decoder
Adaptive 3D comb filtering
3D digital noise reduction
Advanced frame time-base correction (TBC)
Composite, S-Video, YPrPb/RGB SCART support
YPrPb component HD and RGB graphics input support
36-bit digital YPrPb/RGB output supporting 12-bit
?
?
?
?
?
Four current and voltage clamp control loops that ensure
that any dc offsets are removed from the video signal
SCART functionality and SD RGB overlay on CVBS
controlled by fast blank input
SCART source switching detection through FUNCT1 input
Four programmable antialias filters on standard definition
video signals and enhance definition
CVBS monitor output
deep color
ANALOG FRONT END
The ADV7802 analog front end comprises four 12-bit NSV
ADCs that digitize the analog video signal before applying it
to the SDP or CP.
The front end includes a 12-channel input mux that enables
multiple video signals to be applied to the ADV7802 without
the requirement of an external mux. Current and voltage clamps
are positioned in front of each ADC to ensure that the video
signal remains within the range of the converter.
The ADCs are configured to run up to 4× oversampling mode
when decoding composite and S-Video inputs or components
up to 525i and 625i. For 525p and 625p, 2× oversampling is
available. All other video standards are 1× oversampled. In
oversampling the video signals, a reduction in the cost and
complexity of external antialiasing filters can be obtained with
the benefit of an increased signal-to-noise ratio (SNR).
Optional internal antialiasing filters with programmable
bandwidth are positioned in front of each ADC. These filters
can be used to band-limit standard definition (SD) video
signals, removing spurious, out-of-band noise.
The ADV7802 can support simultaneous processing of
CVBS and RGB standard definition signals to enable SCART
compatibility and overlay functionality. A combination of
CVBS and RGB inputs can be mixed, and the output is under
the control of I 2 C registers and the fast blank pin.
STANDARD DEFINITION PROCESSOR
The standard definition processor (SDP) is capable of decoding
a large selection of baseband video signals in composite, S-Video,
and YUV formats. The video standards supported by the SDP
include PAL, PAL 60, PAL M, PAL N, PAL Nc, NTSC M/J,
NTSC 4.43, and SECAM. The ADV7802 can automatically
detect the video standard and process it accordingly. The
ADV7802 can process video up to 525p/625p formats.
The SDP has a 3D temporal comb filter and a five-line super
adaptive 2D comb filter that gives superior chrominance and
luminance separation when decoding a composite video signal.
This highly adaptive filter automatically adjusts its processing
mode according to the video standard and signal quality with
no user intervention required. The SDP has an IF filter block
that compensates for attenuation in the high frequency chroma
spectrum due to a tuner SAW filter. The SDP has specific lumi-
nance and chrominance parameter controls for brightness,
contrast, saturation, and hue.
The ADV7802 implements a patented adaptive digital line
length tracking (ADLLT) algorithm to track varying video
line lengths from sources such as a VCR. ADLLT enables the
ADV7802 to track and decode poor quality video sources (such
as VCRs) and noisy sources (such as tuner outputs, VCR
players, and camcorders). Frame TBC ensures stable clock
synchronization between the decoder and the downstream
devices.
The SDP also contains both a luma transient improvement
(LTI) and a chroma transient improvement (CTI) processor.
This processor increases the edge rate on the luma and chroma
transitions, resulting in a sharper video image.
Rev. D | Page 14 of 36
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
EVAL-ADV7840EB1Z BOARD EVAL FOR ADV7840
EVAL-AVB-LISTENER EVAL-AVB-LISTENER ADV7612
EVAL-CED1Z BOARD EVAL CONVERTER
EVAL-CN0218-SDPZ BOARD CFTL AD8212
EVAL-CN0229-SDPZ EVAL-CN0229-SDPZ
EVAL-CN0235-SDPZ BOARD EVAL LITHIUM ION MONITOR
EVAL-CN0253-SDPZ EVAL MONITOR CIRCUIT FRONT END
EVAL-CN0271-SDPZ EVAL SYSTEM FOR CN0271
相关代理商/技术参数
EVAL-ADV7802EB2Z 制造商:Analog Devices 功能描述:EVAL KIT FOR 12-BIT, SDTV/HDTV 3D COMB FLTR, VID DECODER, AN - Bulk
EVAL-ADV7840EB1Z 功能描述:BOARD EVAL FOR ADV7840 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:Advantiv®, NSV® 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板
EVAL-ADV7842-7511 功能描述:BOARD EVAL FOR ADV7842-7511 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081
EVAL-ADV7842-7511P 功能描述:BOARD EVAL FOR ADV7842-7511P RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081
EVAL-ADV7842EB1Z 功能描述:BOARD EVAL FOR ADV7842EB1Z RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板
EVAL-ADV7842EB2Z 功能描述:BOARD EVAL FOR ADV7842EB2Z RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板
EVAL-ADV7844EB1Z 功能描述:BOARD EVAL FOR ADV7844EB1Z RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板
EVAL-ADV7850EB1Z 制造商:AD 制造商全称:Analog Devices 功能描述:Complete AV Front End