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ADV7403
FUNCTIONAL OVERVIEW
The following overview provides a brief description of the
functionality of the ADV7403 . More details are available in the
ANALOG FRONT END
The analog front end of the ADV7403 provides four 140 MHz
decoding, a multiplexer with 12 analog input channels to enable
multisource connection without the requirement of an external
multiplexer, and four current and voltage clamp control loops to
ensure that dc offsets are removed from the video signal.
SCART functionality and standard definition RGB overlay with
CVBS are controlled by the fast blank input. This front end also
features four antialias filters to remove out-of-band noise on
standard definition input video signals.
STANDARD DEFINITION PROCESSOR (SDP) PIXEL
DATA OUTPUT MODES
The ADV7403 features the following SDP output modes:
Data Sheet
The ADV7403 also features chroma transient improvement
(CTI) and luminance digital noise reduction (DNR), as well as
teletext, closed captioning (CC), extended data service (EDS),
and wide-screen signaling (WSS). It offers certified Macrovision?
copy protection detection on composite and S-Video for all
worldwide formats (PAL/NTSC/SECAM), and a copy
generation management system (CGMS). Other features
include 4× oversampling (54 MHz) for CVBS, S-Video, and
YUV modes; line-locked clock output (LLC); vertical interval
time codes (VITC); support for letterbox detection; a free-run
output mode for stable timing when no video input is present;
clocking from a single 28.63636 MHz crystal; Gemstar? 1×/2×
electronic program guide compatible; and subcarrier frequency
lock (SFL) output for downstream video encoders.
In addition, the device has color controls for hue, brightness,
saturation, and contrast and controls for Cr and Cb offsets. The
ADV7403 also incorporates a vertical blanking interval data
processor and a video programming system (VPS) on the device.
?
?
8-/10-bit ITU-R BT.656 4:2:2 YCrCb with embedded time
codes and/or HS, VS, and FIELD
16-/20-bit YCrCb with embedded time codes and/or HS,
The differential gain of the ADV7403 is 0.4% typical, and the
differential phase is 0.4° typical.
COMPONENT VIDEO PROCESSING
VS, and FIELD
? 24-/30-bit YCrCb with embedded time codes and/or HS,
VS, and FIELD
COMPONENT PROCESSOR (CP) PIXEL DATA
OUTPUT MODES
The ADV7403 features two single data rate (SDR) outputs:
16-/20-bit 4:2:2 YCrCb for all standards, and 24-/30-bit 4:4:4
YCrCb/RGB for all standards. The ADV7403 also features two
double data rate (DDR) outputs: 8-/10-bit 4:2:2 YCrCb for all
standards, and 12-bit 4:4:4 YCrCb/RGB for all standards.
COMPOSITE AND S-VIDEO PROCESSING
The ADV7403 supports NTSC (J, M, 4.43), PAL (B, D, I, G, H,
M, N, Nc, 60), and SECAM (B, D, G, K, L) standards for CVBS
and S-Video formats. Superadaptive 2D, 5-line comb filters for
NTSC and PAL provide superior chrominance and luminance
separation for composite video.
The composite and S-Video processing functionalities also
include fully automatic detection of switching among worldwide
The ADV7403 supports 525i, 625i, 525p, 625p, 720p, 1080i,
1080p, and many other HDTV formats. It provides automatic
adjustments for gain (contrast) and offset (brightness), as well
as manual adjustment controls. Furthermore, the ADV7403 not
only supports analog component YPrPb/RGB video formats
with embedded synchronization or with separate HS, VS, and CS,
but also supports YCrCb-to-RGB and RGB-to-YCrCb conversions
by any-to-any, 3 × 3 color-space conversion matrices.
Standard identification (STDI) enables detection of the component
format at the system level, and a synchronization source polarity
detector (SSPD) determines the source and polarity of the
synchronization signals that accompany the input video.
Certified Macrovision copy protection detection is available on
component formats (525i, 625i, 525p, and 625p).
When no video input is present, free-run output mode provides
stable timing.
The ADV7403 also supports arbitrary pixel sampling for
nonstandard video sources.
standards (PAL/NTSC/SECAM); automatic gain control (AGC)
with white peak mode to ensure that the video is processed
without compromising the video processing range; adaptive
digital line length tracking (ADLLT?); and proprietary architecture
for locking to weak, noisy, and unstable sources from VCRs and
tuners. The IF filter block compensates for high frequency luma
attenuation due to the tuner SAW filter.
Rev. B | Page 12 of 20
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