feature

4 noise-shaping video (NSV) x 12-bit analog-to-digital converters (ADCs) with sampling frequencies up to 140 MHz (140 MHz speed grade only); multiplexer with 12 analog input channels; Skate fast blank support ; Internal anti-aliasing filter; Supports NTSC/PAL/SECAM color standards; 525p/625p component progressive scan support; 720p/1080i component HDTV support; digitizes up to 1280×1024 RGB graphics at 75 Hz (SXGA) ( 140 MHz speed grade only); 24-bit digital input port supports data from DVI/HDMI receiver IC; any-to-any, 3×3 color space conversion matrix; industrial temperature range: -40°C to +85°C; 12 Bit 4:4:4 and 10-/8-bit 4:2:2 DDR pixel output interface; programmable interrupt request output pin; vertical blanking interval (VBI) data slicer, including teletext.

application

LCD/DLP 8482 ; Rear Projection HDTV PDP HDTV CRT HDTV; LCD/DLP Front Projector; LCD TV (HDTV Ready); HDTV Set-Top Box with PVR; Hard Disk Video Recorder; Multi-Format Scan Converter; Supports Progressive Scanning Input DVD burner; AVR receiver.

General Instructions

The ADV7403 is a high-quality, single-chip, multi-format video decoder and graphics digitizer. This multi-format decoder supports the conversion of PAL, NTSC and SECAM standards to digital ITU-R BT.656 format in composite or S-Video format. The ADV7403 also supports decoding component RGB/YPrPb video signals into digital YCrCb or RGB pixel output streams. Support for component video includes standards such as 525i, 625i, 525p, 625p, 720p, 1080i, 1250i, and many other HD and SMPTE standards. The ADV7403 also supports graphics digitization; it is capable of digitizing RGB graphics signals from VGA rate to SXGA rate and converting them to a digital RGB or YCrCb pixel output stream. The SCART and overlay functions are enabled by the ability of the ADV7403 to process both CVB and standard-defined RGB signals. The fast blank pin controls the mixing of these signals.

The ADV7403 contains two main processing sections. The first is the Standard Definition Processor (SDP), which handles all PAL, NTSC, and SECAM signal types; the second is the Component Processor (CP), which handles YPrPb and RGB component formats, including RGB graphics. Refer to the Functional Overview and Theory of Operation sections for a further description of the ADV7403 functionality.

Functional Overview

The following overview briefly describes the capabilities of the ADV7403. See the Theory of Operation section for more details.

Analog front end

The analog front end of the ADV7403 provides four 140 MHz (ADV7403KSTZ-140), NSV, 12-bit ADCs for 10-bit video decoding, a multiplexer with 12 analog input channels for external multiplexer-free Multi-source connections, and four current and voltage clamp control loops to ensure DC offset is removed from the video signal. SCART function and standard definition RGB overlay and CVBS controlled by fast blank input. The front end also features four anti-aliasing filters to remove out-of-band noise on standard-definition input video signals.

Standard Definition Processor (SDP) pixel data output mode

The ADV7403 has the following SDP output modes:

(1), 8-/10-bit ITU-R BT.656 4:2:2 YCrCb with embedded timecode and/or HS, VS and fields;

(2), 16-/20-bit YCrCb with embedded timecode and/or HS, VS and FIELD;

(3), 24/30-bit YCrCb with embedded timecode and/or HS, VS and Field Component Processor (CP) pixel data.

output mode

The ADV7403 has 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 format. Ultra-adaptive 2D, 5-line comb filters for NTSC and PAL provide superior chroma and luma separation for composite video.

Composite and S-Video processing capabilities also include fully automatic detection of switching between global standards (PAL/NTSC/SECAM); automatic gain control (AGC) with white peaking mode to ensure processing without compromising video processing range video; Adaptive Digital Line Length Tracking (ADLLT™); and a proprietary architecture for locking on to weak, noisy, and unstable sources from VCRs and tuners. The IF filter block compensates for the high frequency luma attenuation caused by the tuner SAW filter.

The ADV7403 also features Chroma Transient Improvement (CTI) and Luminance Digital Noise Reduction (DNR), as well as Teletext, Closed Caption (CC), Extended Data Service (EDS) and Widescreen Signaling (WSS). It provides certified Macrovision® copy protection detection for composite and S-Video in all formats worldwide (PAL/NTSC/SECAM) and provides a copy generation management system (CGMS). Other features include 4× oversampling (54 MHz) for CVB, S-Video, and YUV modes; line-locked clock output (LLC); vertical interval time code (VITC); support for letterbox detection; Free-running output mode for stable timing; timing from a single 28.63636 MHz crystal; Gemstar™ 1×/2× EPG compatible; and Subcarrier Frequency Lock (SFL) output for downstream video encoders.

Additionally, the device has color controls for hue, brightness, saturation, and contrast, as well as controls for Cr and Cb offsets. The ADV7403 also integrates a vertical blanking interval data processor and a video programming system (VPS). The differential gain of the ADV7403 is 0.4% and the differential phase is 0.4°.

component video processing

The ADV7403 supports 525i, 625i, 525p, 625p, 720p, 1080i, 1080p and many other HDTV formats. It provides automatic adjustment of gain (contrast) and offset (brightness), as well as manual adjustment controls. Additionally, the ADV7403 supports not only analog component YPrPb/RGB video formats with embedded sync or with separate HS, VS, and CS, but also YCrCb-to-RGB and RGB-to-YCrCb conversion via any-to-any 3x3 color space conversion matrix .

Standard Identification (STDI) allows component formats to be detected at the system level, and a Sync Source Polarity Detector (SSPD) determines the source and polarity of the sync signal accompanying the incoming video.

Certified macro vision copy protection detection is available on component formats (525i, 625i, 525p and 625p). Free-running output mode provides stable timing when there is no video input. The ADV7403 also supports arbitrary pixel sampling from non-standard video sources.

RGB graphics processing

The ADV7403 offers a slew rate of 140 MSPS and supports the ADV7403BSTZ-110 with RGB input resolutions up to 1280×1024 at 75 Hz (SXGA) and 110 ms/sec slew rate. It also provides automatic or manual clamping and gain control for graphics mode.

RGB graphics features contrast and brightness control, SSPD block auto-detection of sync source and polarity, STDI block enabled standard identification, and arbitrary pixel sampling support for non-standard video sources.

Additional RGB graphics processing capabilities of the ADV7403 include:

(1), 32-phase dynamic link library supports optimal pixel clock sampling.

(2), RGB to YCrCb color space conversion and 4:2:2 format extraction, used for video center back-end IC interface.

(3), data enable (DE) output signal, used to directly connect HDMI/DVI transmitter IC.

Digital video input port

The ADV7403 supports raw 8/10-bit CVBS data from the digital tuner and 24-bit RGB input data from the DVI receiver chip, and the output is converted to YCrCb 4:2:2. It also supports 24-bit 4:4:4, 16-/20-bit 4:2:2 525i, 625i, 525p, 625p, 1080i, 720p, VGA to SXGA, 60 Hz, input data from HDMI receiver chip, output converted to 16-bit 4:2:2 YCrCb.

General Features

The ADV7403 features HS, VS, and field output signals with programmable position, polarity, and width. It also includes a programmable interrupt request output pin (INT), signals SDP/CP state change, and supports two IC host port interfaces (control and VBI).

The ADV7403 offers low power consumption: 1.8V digital core, 3.3V analog and digital input/output, low power shutdown mode and green PC mode.

Operating over the industrial temperature range (-40°C to +85°C), the ADV7403BSTZ-110 is a 100-lead, 14mm x 14mm, RoHS-compliant LQFP. It also has a 140 MHz speed rating (ADV7403KST-140).

theory of operation

Analog front end

The ADV7403 analog front end includes four noise-shaped video (NSV), 12-bit ADCs that digitize the analog video signal before applying it to a standard-defined processor (SDP) or component processor (CP). See Table 8 for the maximum sampling rate. 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 ADV7403. Current and voltage clips are placed in front of each ADC to ensure the video signal remains within the range of the converter. Fine clamping of the video signal is performed downstream by digital fine clamping in the CP or SDP.

An optional antialiasing filter is placed in front of each ADC. These filters can be used on band-limited standard-definition video signals to remove spurious out-of-band noise. The ADCs are configured to operate in 4x oversampling mode when decoding composite and S-Video inputs; perform 2x oversampling on component 525i, 625i, 525p and 625p sources. All other video standards are 1× oversampled. Oversampling video signals reduces the cost and complexity of external anti-aliasing filters while increasing the signal-to-tone ratio (SNR).

The ADV7403 can support simultaneous processing of CVB and RGB standard-defined signals for SCART compatibility and overlay functionality. Combinations of CVB and RGB inputs can be mixed outputs under the control of IC registers and fast blank pins.

Standard Definition Processor (SDP)

The SDP section is capable of decoding a large number of baseband video signals in composite S-video and YUV formats. Video standards supported by SDP include PAL (B, D, I, G, H, M, N, Nc, 60), NTSC (J, M, 4.43) and SECAM (B, D, G, K, L). The ADV7403 can automatically detect the video standard and process it accordingly.

The SDP features an ultra-adaptive 2-D, 5-line comb filter that provides superior chrominance and luma separation when decoding composite video signals. This highly adaptive filter automatically adjusts its processing mode according to the video standard and signal quality without user intervention. The SDP has an IF filter block that compensates for the attenuation in the high frequency luma spectrum due to the tuner SAW filter. SDP has specific luminance and chrominance parameter controls for brightness, contrast, saturation, and hue.

The ADV7403 implements a patented Adaptive Digital Line Length Tracking (ADLLT™) algorithm for tracking variable video line lengths from sources such as VCRs. ADLLT enables the ADV7403 to track and decode low-quality video sources such as VCRs, noise sources from tuner outputs, VCD players, and cameras. The SDP also contains a Chroma Transient Improvement (CTI) processor. The processor increases the edge rate of chroma conversion, resulting in sharper video images.

SDP can handle a variety of VBI data services such as TeleText, Closed Captioning (CC), Widescreen Signaling (WSS), Video Programming System (VPS), Vertical Interval Time Code (VITC), Copy Generation Management System (CGMS), Gemstar 1 ×/2×, Extended Data Service (XDS). The ADV7403 SDP section has a Macrovision 7.1 detection circuit that allows it to detect Class I, II, and III protection levels. The decoder is also fully robust to all macro vision signal inputs.

Component Processor (CP)

The CP part is capable of decoding/digitizing various component video formats in any color space. Component video standards supported by the CP include 525i, 625i, 525p, 625p, 720p, 1080i, 1250i, VGA up to SXGA at 75 Hz (ADV7403KSTZ-140 only) and many others not listed here. The CP segment of the ADV7403 contains the AGC block. When there is no embedded sync, the video gain can be set manually. Following the AGC section is a digital clamp circuit that ensures the video signal is clamped to the correct blanking level. Automatic adjustments within CP include gain (contrast) and offset (brightness); manual adjustment controls are also supported.

A fully programmable arbitrary 3x3 color space conversion matrix is placed between the analog front end and the CP section. This will enable YPrPb to RGB and RGB to YCrCb conversions. Many other standards for color spaces can be implemented using color space converters.

The output section of the CP is highly flexible. It can be configured in SDR with one data packet per clock cycle, or in DDR mode with data displayed on the rising and falling edges of the clock. In SDR mode, 16/20-bit 4:2:2 or 24/30-bit 4:4:4 output is possible. In these modes, HS, VS and FIELD/DE (if applicable) timing reference signals are provided. In DDR mode, the ADV7403 can be configured as an 8-/10-bit 4:2:2 YcrCb or 12-bit 4:4:4 YcrCb/RGB pixel output interface with corresponding timing signals.

The ADV7403 can support external DVI/HDMI receivers. The digital interface requires 24-bit 4:4:4 or 16-/20-bit 4:2:2-bit data (graphics RGB or component video YcrCb) with HS, VS, DE and fully synchronized clock signals. Data is processed in CP and output as 16-bit 4:2:2 YcrCb data.

The CP part contains the ability to detect

Macrovision encodes YPrPb signals for 525i, 625i, 525p and 625p. It is designed to be fully robust when decoding these types of signals.

VBI extraction of CGMS data is performed by the CP section of the ADV7403 for interlaced, progressive, and high-definition scan rates. The extracted data can be read back through the IC interface. For more detailed product information, see the ADV7403 product page.

Recommended External Loop Filter Components

Place the external loop filter components of the ELPF pins as close as possible to the corresponding pins. Figure 8 shows the recommended component values.

Dimensions