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SoCs support Full HD, WXGA resolutions for LCD TVs

Posted: 08 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:SoC signal processing? Full HD resolution? LCD TV?

R8J66957BG, R8J66955BG

Renesas Technology Corp. has introduced two new SoC devices for use in LCD digital TVs that handle the main signal processing tasks from demodulation of digital broadcast signals to signal output to the LCD panel. The R8J66957BG supports Full HD resolution and the R8J66955BG WXGA resolution.

These two new products enable the development of TV sets with fewer components by supporting resolutions of up to either Full HD or WXGA with the addition of a single external memory (DRAM) device. The R8J66957BG and R8J66955BG both support ATSC signal processing for digital broadcasts and NTSC signal processing for analog broadcasts, which are the video formats used in North America. In addition, they support the component, composite and S-video interface formats used worldwide. They produce 10bit LVDS as the output to the LCD panel.

Both products also incorporate functions for enhanced picture quality. They have on-chip functions to ensure that the TV set delivers a high-quality picture, including a 3D noise reduction circuit (which prevents flicker by detecting and suppressing noise elements in the analog video signal), 3D de-interlacing, 3D Y/C separator circuit (which separates the luma and chroma signals), and NCM for color management.

Built-in audio processing functions include BTSC, the multiplexing system used in North America, and analog audio input and output. In addition, a one-channel DDR2-SDRAM interface supporting a bus width of 16 bits transfer speed of 800Mbit/s is implemented on-chip to allow connection of an external DRAM device.

The devices perform the main signal processing operations for an LCD digital TV. The R8J66957BG and R8J66955BG integrate functions that previously would have required external components, such as USB, sound demodulator and audio ADC. This helps to reduce the total number of components needed.

In addition, the packages of the R8J66955BG and R8J66957BG are completely pin-compatible, allowing the use of a common development platform for WXGA- and Full HD-compatible TV sets, boosting development efficiency and reducing associated costs.

The devices are housed in a 376-pin PBGA package that measures 23mm x 23mm, which is among the smallest in the industry for a digital TV signal processing SoC. This contributes to a more compact mounting area on the PCB.

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