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Video decoder with 3D comb filter aims at HDTVs

Posted: 23 Jan 2008 ?? ?Print Version ?Bookmark and Share

Keywords:3D comb video decoder? 3D comb filtering? ADC?


Analog Devices Inc. has expanded its Advantiv advanced TV portfolio with a new 12bit resolution 3D comb video decoder with an integrated 150MSps digitizer for Full-HD 1,080p input formats. The ADV7802 provides system designers with a complete single-chip solution for improving video image and color quality in advanced HDTVs, video-processors, A/V receiver (AVR) systems and DVD recorders.

The 12bit 3D comb video decoder offers superior processing resolution for motion detection and 3D comb filtering operations, vs. existing video decoder solutions, enabling designers to reduce trade-offs between image sharpness and Y/C separation performancesomething that has traditionally been reserved for professional and studio broadcast applicationswithout the added cost and design complexity of discrete chip solutions.

ADV7802 is the industry's only true 12bit-resolution decoder with 4:4:4 sampling throughout the processing pipeline, including support for RGB SCART inputs, to provide designers with a higher level of system performance compared to existing 8bit industry offerings using 4:2:2 sampling schemes. The addition of an on-chip interface with support for SDR (single data-rate) DRAM reduces overall system cost while support for DDR (double data-rate) DRAM enables simultaneous 12bit 3D comb (NTSC or PAL), digital noise reduction (DNR) and time base correction (TBC), providing designers with a complete solution for decoding standard-definition (SD) video for noisy off-air broadcast signals or poor-quality VCR tape recordings with unstable timing.

The device's multiformat conversion capability allows designers to easily convert analog video signals to create the vivid images, deeper colors and enhanced digital imaging features that consumers have come to expect in their video-processing and DTV applications. For TV chassis designs targeted to multiple end markets, the ADV7802 automatically detects and performs 3D comb filtering for a wide range of video standards in all regions, including all variants of NTSC and PAL. Advanced SECAM decoding is also supported. Support for detecting and decoding weak terrestrial TV broadcast signals has been improved to ensure the best possible picture, even under remote reception conditions.

Leveraging ADI's ADC technology and advanced adaptive Y/C separation algorithms, the single-chip solution provides high-end video performance with its 3-tap, zero field latency 3D comb filter which operates on the full PAL field sequence. The ADV7802's 3D adaptive comb filter produces sharper, more accurate color reproduction, while the decoder's enhanced 12bit YCbCr or RGB output capability (with interlaced or conversion to progressive scan timing) enhances a system's HDMI Deep Color processing capabilitieseven for analog input sources.

The ADV7802 12bit 3D comb video decoder is now shipping in production quantities and is available in a 176-pin TQFP (thin quad flatpack) package. The ADV7802 is priced below $12 per unit in volume quantities. A 10-bit version, the ADV7800, is also available in a 176-pin TQFP and is priced below $10 per unit in volume quantities.

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