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What is ADV7184?

This electronic component, produced by the manufacturer "Analog Devices", performs the same function as "Multiformat SDTV Video Decoder".


ADV7184 Datasheet PDF - Analog Devices

Part Number ADV7184
Description Multiformat SDTV Video Decoder
Manufacturers Analog Devices 
Logo Analog Devices Logo 


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Multiformat SDTV Video Decoder
with Fast Switch Overlay Support
ADV7184
FEATURES
Multiformat video decoder supports NTSC (J/M/4.43),
PAL (B/D/G/H/I/M/N), SECAM
Integrates four 54 MHz, 10-bit ADCs
SCART fast blank support
Clocked from a single 28.63636 MHz crystal
Line-locked clock-compatible (LLC)
Adaptive Digital Line Length Tracking (ADLLT™), signal
processing, and enhanced FIFO management give
mini-TBC functionality
5-line adaptive comb filters
Proprietary architecture for locking to weak, noisy, and
unstable video sources such as VCRs and tuners
Subcarrier frequency lock and status information output
Integrated automatic gain control (AGC) with adaptive peak
white mode
Macrovision® copy protection detection
Chroma transient improvement (CTI)
Digital noise reduction (DNR)
Multiple programmable analog input formats
CVBS (composite video)
Y/C (S-video)
YPrPb (component) (VESA, MII, SMPTE, and BETACAM)
12 analog video input channels
Integrated antialiasing filters
Programmable interrupt request output pin
Automatic NTSC/PAL/SECAM identification
GENERAL DESCRIPTION
The ADV7184 integrated video decoder automatically detects and
converts standard analog baseband television signals compatible
with worldwide NTSC, PAL, and SECAM standards into
4:2:2 component video data compatible with 16- or 8-bit CCIR
601/CCIR 656.
The advanced, highly flexible digital output interface enables
performance video decoding and conversion in line-locked,
clock-based systems. This makes the device ideally suited for a
broad range of applications with diverse analog video character-
istics, including tape-based sources, broadcast sources, security
and surveillance cameras, and professional systems.
The accurate 10-bit ADC provides professional quality video
performance and is unmatched. This allows true 8-bit
resolution in the 8-bit output mode.
The 12 analog input channels accept standard composite, S-video,
and component video signals in an extensive number of
combinations.
Digital output formats (8-bit or 16-bit)
ITU-R BT.656 YCrCb 4:2:2 output + HS, VS, and FIELD
0.5 V to 1.6 V analog signal input range
Differential gain: 0.5% typical
Differential phase: 0.5° typical
Programmable video controls
Peak white/hue/brightness/saturation/contrast
Integrated on-chip video timing generator
Free-run mode (generates stable video output with no input)
VBI decode support for close captioning (including Gemstar®
1×/2× (XDS)), WSS, CGMS, teletext, VITC, VPS
Power-down mode
2-wire serial MPU interface (I2C® compatible)
3.3 V analog, 1.8 V digital core, 3.3 V input/output supply
Industrial temperature grade: −40°C to +85°C
80-lead, Pb-free LQFP
APPLICATIONS
High end DVD recorders
Video projectors
HDD-based PVRs/DVDRs
LCD TVs
Set-top boxes
Security systems
Digital televisions
AVR receivers
AGC and clamp-restore circuitry allow an input video signal
peak-to-peak range of 0.5 V to 1.6 V. Alternatively, these can be
bypassed for manual settings.
The fixed 54 MHz clocking of the ADCs and datapath for all
modes allows very precise, accurate sampling and digital filtering.
The line-locked clock output allows the output data rate, timing
signals, and output clock signals to be synchronous, asynchronous,
or line locked even with ±5% variation in line length. The output
control signals allow glueless interface connections in most
applications. The ADV7184 modes are set up over a 2-wire,
serial, bidirectional port (I2C compatible).
SCART and overlay functionality are enabled by the ability of
the ADV7184 to process CVBS and standard definition RGB
signals simultaneously. Signal mixing is controlled by the fast
blank pin. The ADV7184 is fabricated in a 3.3 V CMOS process.
Its monolithic CMOS construction ensures greater functionality
with lower power dissipation. It is packaged in a small, Pb-free,
80-lead LQFP.
Rev. A
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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 ©2005–2007 Analog Devices, Inc. All rights reserved.

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ADV7184 equivalent
ADV7184
INTRODUCTION
The ADV7184 is a high quality, single chip, multiformat video
decoder that automatically detects and converts PAL, NTSC,
and SECAM standards in the form of composite, S-video, and
component video into a digital ITU-R BT.656 format.
The advanced, highly flexible digital output interface enables
performance video decoding and conversion in line-locked, clock-
based systems. This makes the device ideally suited for a broad
range of applications with diverse analog video characteristics,
including tape-based sources, broadcast sources, security and
surveillance cameras, and professional systems.
ANALOG FRONT END
The ADV7184 analog front end includes four 10-bit ADCs that
digitize the analog video signal before applying it to the standard
definition processor (SDP). The analog front end uses differential
channels for each ADC to ensure high performance in mixed-
signal applications.
The front end also includes a 12-channel input mux that enables
multiple video signals to be applied to the ADV7184. Current and
voltage clamps are positioned in front of each ADC to ensure
that the video signal remains within the range of the converter.
Fine clamping of the video signals is performed downstream
by digital fine clamping within the ADV7184. The ADCs are
configured to run in 4× oversampling mode.
The ADV7184 has optional antialiasing filters on each of
the four input channels. The filters are designed for standard
definition (SD) video with approximately 6 MHz bandwidth.
SCART and overlay functionality are enabled by the ability of
the ADV7184 to process CVBS and standard definition RGB
signals simultaneously. Signal mixing is controlled by the fast
blank (FB) pin.
STANDARD DEFINITION PROCESSOR (SDP)
The ADV7184 is capable of decoding a large selection of baseband
video signals in composite, S-video, and component formats. The
video standards that are supported include PAL B/D/I/G/H,
PAL 60, PAL M, PAL N, PAL Nc, NTSC M/J, NTSC 4.43, and
SECAM B/D/G/K/L. The ADV7184 can automatically detect
the video standard and process it accordingly.
The ADV7184 has a 5-line, superadaptive, 2D comb filter that
provides 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 without requiring user intervention.
Video user controls such as brightness, contrast, saturation, and
hue are also available within the ADV7184.
The ADV7184 implements the patented ADLLT algorithm to
track varying video line lengths from sources such as a VCR.
ADLLT enables the ADV7184 to track and decode poor quality
video sources such as VCRs and noisy sources from tuner outputs,
VCD players, and camcorders. The ADV7184 contains a CTI
processor that sharpens the edge rate of chroma transitions,
resulting in sharper vertical transitions.
The ADV7184 can process a variety of VBI data services, such
as closed captioning (CC), wide-screen signaling (WSS), copy
generation management system (CGMS), Gemstar® 1×/2×,
extended data service (XDS), and teletext. The ADV7184 is
fully Macrovision certified; detection circuitry enables Type I,
Type II, and Type III protection levels to be identified and
reported to the user. The decoder is also fully robust to all
Macrovision signal inputs.
FUNCTIONAL BLOCK DIAGRAM
AIN1 TO 12
AIN12
ANTI-
CLAMP ALIAS
FILTER
10
A/D
DATA
PREPROCESSOR
ANTI-
INPUT CLAMP ALIAS
MUX
FILTER
ANTI-
CLAMP ALIAS
FILTER
10
A/D
10
A/D
10
DECIMATION AND 10
DOWNSAMPLING 10
FILTERS
10
ANTI-
CLAMP ALIAS
FILTER
10
A/D
SYNC PROCESSING AND
CLOCK GENERATION
SYNC AND
CLK CONTROL
FB
ADV7184
SCLK
SDA
ALSB
SERIAL INTERFACE
CONTROL AND VBI DATA
CONTROL
AND DATA
CVBS/Y
FSC
RECOVERY
CVBS
C
Cr
CHROMA
DEMOD
Cb
R
G COLOR SPACE
B CONVERSION
STANDARD DEFINITION PROCESSOR
LUMA
FILTER
LUMA
RESAMPLE
LUMA
2D COMB
Y
(5H MAX)
SYNC
EXTRACT
CHROMA
FILTER
RESAMPLE
CONTROL
CHROMA
RESAMPLE
CHROMA Cr
2D COMB
(4H MAX)
Cb
Y
Cr
Cb
16
FAST
BLANK
OVERLAY
CONTROL
AND
AV CODE
INSERTION
VBI DATA RECOVERY
MACROVISION
DETECTION
GLOBAL CONTROL
STANDARD
AUTODETECTION
SYNTHESIZED
LLC CONTROL
FREE-RUN
OUTPUT CONTROL
8 PIXEL
DATA
8 P15 TO P8
P7 TO P0
HS
VS
FIELD
LLC1
LLC2
SFL
INT
Figure 1.
Rev. A | Page 4 of 112


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