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Panasonic Develops Advanced VSB Digital Demodulation LSI for U.S. DTV Market

(July 30, 2001)
Matsushita Electric Industrial Co., Ltd., known worldwide for its consumer electronics and digital communications products, announced the development of an advanced, single-chip VSB (Vestigial Side-Band) digital demodulation LSI (large scale integrated circuit) for U.S. digital terrestrial broadcasting receivers.

The chip features exceptional performance in reducing both multipath interference and power consumption and is expected to greatly expand the use of digital TVs as well as accelerate the continued digitization of the U.S. terrestrial broadcasting network. Sample products are currently available, and orders from other digital television manufacturers as well as other customers will be taken in August.

One of the new LSI's key advantages is that it will enable wider and more stable indoor antenna reception, even compared to the COFDM digital transmission system used primarily in Europe. The chip offers exceptional performance in reducing both dynamic and static multipath interference, with 100 times the effectiveness of previous Panasonic chips. Incorporating an algorithm specially designed by Panasonic, the LSI can simultaneously reduce both dynamic and static multipath waves, quickly adapting to the state of the multipath interference present in an input signal. Reduction of multipath interference is crucial in boosting the performance of indoor antenna reception.

"Panasonic's development of this new chip will help lay to rest concerns about multipath interference in urban areas," said Dr. Paul Liao, chief technology officer for Matsushita Electric Corporation of America, the principal Panasonic subsidiary in North America. "We expect the LSI will encourage manufacturers and broadcasters alike to rapidly accelerate the implementation of their business plans related to digital television."

As digital technologies continue to find new applications, increased efficiency and smaller size become more important. In the case of the new Panasonic LSI, this is achieved through the integration on to a single chip of many digital and analog circuits -- including previous external detection circuitry, a 10-bit AD converter, and PLL circuit. Compared to previous Panasonic LSIs, the new chip takes up just one-fourth the mounting area and can be produced for only one-third the cost. In addition, by employing the most advanced chip packaging methods, the overall package size of the new chip is only one-fifth that of most conventional products.

By achieving such advanced efficiency in a much smaller package, Panasonic's new LSI also offers remarkably low power consumption at just 600 mW, only one-fifth the power requirement for most conventional products. This low power consumption is achieved by reducing the internal voltage to just 1.8 V, adopting a CMOS 4-layer 0.18-um process, and optimizing the circuit architecture to dynamically adjust the frequency based on processing needs.

A wide range of industry-leading Panasonic DTV products are offered in the U.S., including widescreen (16:9 aspect ratio) and 4:3 aspect ratio direct view monitors, projection sets, Digital Light Processing and plasma monitors, as well as digital receiver set-top boxes and digital broadcast satellite dishes. Highlighting Panasonic's U.S. DTV lineup are the CT-34WX50, a 34-inch widescreen direct view monitor; the PT-47WX49, a 47-inch widescreen projection set retailing for $2099.95; a 52-inch projection monitor that utilizes digital light processing technology; and the PT-50PD3, a 50-inch plasma display.

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