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10-Bit, SDTV/HDTV 3D Comb Filter,
Video Decoder, and Graphics Digitizer
Data Sheet
FEATURES
ADV7800
DDR/SDR SDRAM
INTERFACE
Four 10-bit ADCs
ADV7800
DATA (16)
CLK
ADDRESS (14)
CONTROL (9)
10-bit high dynamic range processing
ANALOG INPUT INTERFACE
12-channel analog input mux
10-bit deep color processing
Analog monitor output
NTSC/PAL/SECAM color standards support
NTSC/PAL 3D comb filter
GR RGB
YPrPb
SCART
CVBS
S-VIDEO
CLAMP
CLAMP
CLAMP
CLAMP
ADC
ADC
ADC
ADC
DDR/SDR
SDRAM
INTERFACE
STANDARD
DEFINITION
PROCESSOR
(SDP)
10
10
10
Y
Cb
Cr
3D digital noise reduction (DNR)
Advanced time base correction (TBC) with frame
DAC
DIGITAL INPUT
ADC_CLK
CORE_CLK
synchronization
HS_IN1
INTERFACE
Interlaced-to-progressive conversion for 525i and 625i
Advanced VBI data slicer, including Teletext, CC, and V-chip
IF compensation filter
VS_IN1
SOG
XTAL
SYNC CP
SDP
ADC, CORE, MEMORY
CLK GENERATION
PLL
ANA
DIG
CORE_CLK
HS
VS
FLD
SCART fast blank support including slow switch detect
Programmable internal antialias filters
DDS FOR SDP LINE-LOCKED
CLK GENERATION
DAC
CP
SDP
COMPONENT
PROCESSOR
(CP)
DE
LLC
Weak, poor time base, and nonstandard signal support
I 2 C CONFIGURATION
Vertical peaking, horizontal peaking, CTI, LTI
ANALOG
DIGITAL
Simultaneous interlaced and progressive parallel output for
525i/525p and 625i/625p
525p/625p component progressive scan support
720p/1080i/1080p component HDTV support
Digitizes RGB graphics with maximum pixel clock rate
of 150 MHz (150 MHz speed grade only)
24-bit digital input port supports data from DVI/HDMI Rx IC
Any-to-any, advanced 3 × 3 color space conversion matrix
Flexible output pixel interface supporting 8-/10-/16-/
20-/24-/30-bit SDR/DDR 4:2:2/4:4:4 data formats
Programmable interrupt request output pin
APPLICATIONS
AV receivers
LCD HDTVs
PDP HDTVs
CRT HDTVs
HDTV STBs with PVR
DVD recorders with progressive scan input support
Projectors
Figure 1. Simplified Functional Block Diagram
GENERAL DESCRIPTION
The ADV7800 1 is a high quality, single-chip, multiformat 3D
comb filter, video decoder, and graphics digitizer. This multi-
format 3D comb filter decoder supports the conversion of PAL,
NTSC, and SECAM standards in the form of a composite or an
S-Video into a digital ITU-R BT.656 format. The ADV7800 also
supports the decoding of a component RGB/YPrPb video signal
into a digital YCrCb or RGB pixel output stream.
The support for component video includes standards such as
525i, 625i, 525p, 625p, 720p, 1080i, 1080p, and many other HD
and SMPTE standards. Graphics digitization is supported by
the ADV7800; it is capable of digitizing RGB graphics signals
from VGA to SXGA rates and converting them into a digital
RGB or YCrCb pixel output stream. SCART and overlay
functionality are enabled by the ability of the ADV7800 to
simultaneously process CVBS and standard definition RGB
signals.
The ADV7800 contains two main processing sections. The first
section is the standard definition processor (SDP), which processes
all PAL, NTSC, SECAM, and component (up to 525p/625p)
signal types. The second section is the component processor
(CP), which processes YPrPb and RGB component formats,
including RGB graphics.
1
Protected by U.S. Patent Number 4,907,093 and other intellectual
property rights.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ?2011 Analog Devices, Inc. All rights reserved.
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