Data Sheet ADV7482
video standard and signal quality without requiring user
intervention. Video user controls such as brightness, contrast,
saturation, and hue are also available with the ADV7482.
The ADV7482 implements the patented Adaptive Digital Line
Length Tracking (ADLLT™) algorithm to track varying video
line lengths from sources such as a VCR. ADLLT enables the
ADV7482 to track and decode poor quality video sources such
as VCRs and noisy sources from tuner outputs, VCD players,
and camcorders. The ADV7482 contains a chroma transient
improvement (CTI) processor that sharpens the edge rate of
chroma transitions, resulting in sharper vertical transitions.
The ACE of the ADV7482 offers improved visual detail using
an algorithm that automatically varies contrast levels to enhance
picture detail. ACE allows the contrast of an image to increase
depending on the content of the picture. Typically, this allows
bright areas to be made brighter and dark areas to be made
darker. However, the ADV7482 ACE feature also allows the
contrast within dark areas to increase without significantly
affecting the bright areas of the picture. This feature is
particularly useful in automotive applications, where it is
important to discern objects in shaded areas.
Down dithering converts the output of the ADV7482 from an
8-bit to a 6-bit output, enabling ease of design for standard LCD
panels.
The SDP can process a variety of VBI data services, such as
closed captioning (CCAP), wide screen signaling (WSS), and
copy generation management system (CGMS).
The ADV7482 is fully Rovi®(Macrovision®) compliant; 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.
8-BIT DIGITAL INPUT/OUTPUT PORT
The ADV7482 features an 8-bit digital bidirectional port. The
following formats are supported both as input and output ports:
• 8-bit interleaved 4:2:2 SDR input/output with embedded
timing codes
• 8-bit interleaved 4:2:2 DDR input/output with embedded
timing codes
The maximum input and output video resolution supported is
720p/1080i in both SDR and DDR modes.
Video received on the 8-bit digital input port can be routed to
the four-lane MIPI CSI-2 transmitter. Video sent on the 8-bit
digital output port can be routed from either the SD core or the
CP core.
AUDIO PROCESSING
The ADV7482 features an audio processor that handles the
audio extracted from the HDMI stream by the HDMI receiver.
It contains an audio mute controller that can detect a variety of
conditions that may result in audible extraneous noise in the
audio output. On detection of these conditions, a 2-channel
linear PCM audio signal can be ramped down to a mute state to
prevent audio clicks or pops.
The audio is output on a single flexible serial digital audio
output port supporting I2S-compatible, left justified, and right
justified audio output modes in master mode only. TDM is also
supported, allowing up to eight audio channels with a sample
rate up to 48 kHz to be transmitted over the single serial digital
audio interface.
MIPI CSI-2 TRANSMITTERS
The ADV7482 features two MIPI CSI-2 transmitters: a four-
lane transmitter (Transmitter A) and a single lane transmitter
(Transmitter B).
The four-lane transmitter consists of four differential data lanes
(DA0N, DA0P, DA1N, DA1P, DA2N, DA2P, DA3N and DA3P),
and a differential clock lane (CLKAN and CLKAP). It supports
four data lanes, two data lanes, and one data lane muxing
options, and can be used to transmit video received on either
the HDMI receiver (processed through the CP), the 8-bit digital
input port, or the AFE (processed through the SDP).
The main features of the four-lane MIPI transmitter
(Transmitter A) include
• Support for 8-bit and 10-bit YCbCr 4:2:2 video modes.
• Support for 24-bit RGB 4:4:4 (RGB888), 18-bit RGB 4:4:4
(RGB666), and 16-bit RGB 4:4:4 (RGB565) video modes.
• Support for video formats ranging from 480i to 1080p, and
display resolutions from VGA to UXGA (certain
restrictions apply to the muxing option, video mode, and
video format that can be selected).
• Data lanes and clock lane remapping to ease PCB layout.
The single lane transmitter consists of a single differential data
lane (DB0N and DB0P) and a differential clock lane (CLKBN
and CLKBP). It transmits video received on the AFE (processed
through the SDP).
The main features of the single lane MIPI transmitter
(Transmitter B) include
• Support for 8-bit YCbCr 4:2:2 video mode.
• Support for 480i and 576i video formats.
INTERRUPTS
The ADV7482 features two interrupt request pins. INTRQ1 and
INTRQ2 can be programmed to trigger interrupts based on
various selectable events related to the HDMI receiver (video
and audio related), the SDP, and the CP.
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