For those who are new to this subject, here is a rehash of news stories about the LG 5th generation over-the-air HDTV receiver chip, which LG claims has a 94% success rate, much higher than any previous chip. I believe the Casper chip only claims a 85% success rate.
If you want this chip, I suggest you e-mail LG and ask them to bring a product to market in a stand alone HDTV receiver as soon as possible.
Write to: email@example.com
Top Digital TV Chip Supplier
By Kim Sung-jin
LG Electronics developed a digital television receiver chip that significantly improved reception of digital broadcasting signals, the electronics giant said on Monday. With the new chip, the company eyes to become world's largest digital TV chip supplier by 2007.
The company said on Monday that its newest receiver chip boasts the best digital broadcasting signal reception rate of 94 percent, much higher than similar products on the market at the moment.
LG's so-called fifth-generation digital TV receiver chip improved the digital TV signal reception rate from fourth-generation chips that had signal reception rates of some 60 percent on average.
``Our newest receiver chip will help solve the so-called 'multiple-ghost phenomenon,' which refers to poor digital signal reception caused by skyscrapers in urban centers. In a recent field test by a local TV station, Our newest receiver chip demonstrated a signal reception success rate of 94 percent,'' a company spokesman said.
The company's chip also enables a digital TV set to receive both terrestrial and cable digital-TV broadcasting services with a single receiver chip. Terrestrial digital broadcasting is based on vestigial side band (VSB) whereas digital cable broadcast is based on quadrature amplitude modulation (QAM).
LG Electronics predicts the receiver chip will greatly stimulate digital TV demand at both home and abroad as it greatly reduced digital TV signal reception failures indoors and in urban areas.
The company has obtained 60 patents for its fifth-generation digital TV receiver chip, developed at a cost of 8 billion won ($6.9 million) over the past two years. It developed the world's first digital TV receiver chip in 1997.
With the development of its digital TV receiver chip, LG Electronics aims to emerge as the world's largest digital TV chip supplier by 2007 by securing 50 percent of the global market.
The company's new receiver chip is likely to greatly appeal to the U.S. market, of which 70 percent is controlled by cable TV firms.
The latest chip development will also put LG Electronics in an advantageous position in the international race to meet the U.S. Federal Communications Commission's digital tuner mandate, which requires TV makers to equip at least 50 percent of their 36-inch and larger TVs with a terrestrial digital TV tuner/decoder by July 1.
Meanwhile, LG Electronics expects more than $100 million revenue from royalties paid for its technological patents on the VSB transmission standard, which will be adopted by the United States from next year.
Sinclair praises new LG Electronics DTV receiver chips
Jun 11, 2004
Sinclair Broadcast Group, a severe critic of early DTV reception, said in the latest generation of DTV receiver technology that significant improvements will mean better over-the-air reception of DTV signals using simple indoor antennas.
Sinclair's previous concerns were based on 8-VSB modulation standard DTV signals with strong dynamic multipath (ghosts) and varying signal levels. Earlier-generation receivers were unable to handle these signal conditions.
Nat Ostroff, Sinclair's vice president of new technology, said that he is pleased to see the progress made by Zenith (a brand of L.G. Electronics) that will allow consumers to easily receive free digital television broadcasts in their homes. He said that broadcasters and consumers could now look forward to a robust DTV service delivered over-the-air without having to subscribe to cable or satellite.
He added that this is especially timely because of the FCC-mandated rollout of millions of large-screen HDTV receivers with integrated over-the-air tuners beginning this summer.
Informal joint field tests, conducted last month in Baltimore by representatives from Sinclair and Zenith, involved testing reception at sites Sinclair had previously identified as having difficult multipath conditions. Many of these sites did not have successful reception with early generations of receivers investigated by Sinclair.
Sinclair said results of the new trials show dramatically improved reception with the receiver built around a new DTV chip developed by LG Electronics. The fifth-generation integrated circuit allows it to lock onto signals in severe multipath environments even when the ghosts have long delays or are larger than the main signal.
Ostroff said that, with indoor reception now more viable, broadcasters need to examine their current transmitting power levels to assure that they deliver an adequate signal inside the home, and consumer electronics manufacturers need to ensure that breakthrough technologies such as this are available in the market.
Field data was collected from multiple DTV stations at numerous sites, including parking garages and sidewalk locations, many without direct line of sight to the transmitter. Simple indoor antennas were used to explore the improvements that have been made in indoor reception and ease-of-use in moderate and strong signal areas.
The fifth-generation receiver chipset tested will be introduced by LG Electronics later this summer.
News: by Bob Kovacs
Is DTV Reception Problem Solved?
Zenith's receiver draws kudos
The scramble to switch television broadcasting to digital sometimes overlooked what occurred at the final link in the over-the-air broadcast chain: the viewer.
Although megabucks have been spent to upgrade stations and simultaneously transmit analog and digital signals, stable and reliable over-the-air DTV reception has been a crapshoot. However, the latest generation of DTV receiver technology from LG/Zenith seems to have solved the worst of the problems and is receiving praise from both broadcasters and other interested parties.
Dubbed the "fifth-generation" receiver, the new technology has converted some early DTV skeptics into believers.
"The performance that we got out of the fifth-generation receiver was as good as what we had seen with COFDM," said Nat Ostroff, president and CEO of Ai and vice president of new technology for Sinclair Broadcasting in Hunt Valley, Md.
Ostroff recently observed tests of the LG/Zenith fifth-generation receiver at several particularly difficult reception locations in Baltimore, where Sinclair conducted tests of earlier receivers and comparison tests using COFDM modulation. He had been outspoken in his criticism of the early adoption of the 8-VSB modulation scheme by the ATSC, pointing out that field tests up until now showed that reception in many places was simply impossible.
THE CLIFF EFFECT
The 8-VSB transmission system adopted by the ATSC for DTV transmission in the U.S. has had many critics among broadcasters and television insiders, primarily because--until now--consistent reception in a typical viewing environment was tricky at best. The term "cliff effect" described what too often happened when watching DTV off the air using earlier equipment: Either the signal looked perfect on the TV or it completely dropped out, as if falling off a cliff.
The fifth-generation receiver was far more immune to the cliff effect during Sinclair Broadcasting's tests of the receiver.
"We had always said that all we are interested in was a viable over-the-air receiving system and we didn't have it," Ostroff said. "When 8-VSB can be received as well as a COFDM signal, we'll be the first to declare that to be the case and congratulate the winner, and that's exactly what we've done."
Ostroff was enthusiastic about the potential of the fifth-generation receiver.
"It's the only receiver so far that enables reception indoors with simple antennas," he said.
The tests Ostroff witnessed in Baltimore used a simple bow-tie antenna and he said reception was unperturbed by the movement of people in the vicinity and even active vehicle traffic just a few feet away.
Sinclair Broadcasting's tests were informally duplicated and confirmed by Mark Schubin, a well-known consulting engineer on television issues and the creator of "Mark's Monday Memo" that discusses issues in broadcasting.
Schubin has tried various 8-VSB DTV receivers in his New York apartment with virtually no reception success, until he was able to test an LG LST-3100A receiver--a fourth-generation model--that had been upgraded with the fifth-generation DTV receiving and processing technology.
Like Ostroff, Schubin reported that reception was stable while using a simple set-top UHF antenna and people moved around the room.
"It was possible to find a location and orientation that caused problems, but I had to really try," Schubin said in a recent issue of the memo.
Richard Lewis, vice president of research and technology for Zenith, said that the inner workings of this latest DTV receiver are a blend of well-known techniques as well as some proprietary designs.
"The fifth-generation is a much more radical approach," Lewis said. "It uses a 50 microsecond equalizer window to handle pre-ghost or post-ghost [multipath] and was really focused on indoor reception and ease-of-reception with simple antennas."
Earlier generations of receivers could also do pre- and post-ghost correction but did not have the long pre-ghost window that the latest generation has.
"The main change was a departure in architecture away from what had been used [previously]," Lewis said. "It is proprietary so I can't really get into the details, but it was a chance to throw out the old design book and take a fresh start at it."
Other interested parties have all responded favorably to the tests done with LG/Zenith's fifth-generation receiver.
Mark Richer, president of the ATSC, has been a leading proponent of 8-VSB modulation used in the U.S. for digital broadcasting.
"It has always been my view that 8-VSB receiver technology would advance quickly," Richer said. "In this highly competitive marketplace, you are going to see rapid advancement of DTV receiver technology from a number of manufacturers."
Manufacturers feel that after years of vilification by broadcasters, finally they've been vindicated.
"We've said over the years that ATSC reception would improve and I'm glad that we were proven right," said Mike Petricone, vice president of technology policy for the Consumer Electronics Association.
Sinclair Broadcasting's Ostroff said that his company is so excited about the new possibilities of DTV that it produced public service announcements to promote DTV for consumers. The spots are not specific to Sinclair and the company is offering them free of charge to any broadcaster as a way to generate viewer interest in DTV.
Others pursuing LG/Zenith's technology include USDTV, the Salt Lake City broadcaster that has launched a pay over the air DTV service using spectrum pooled from participating broadcasters. The company recently announced it will use fifth-generation DTV receiver chips in its latest set-top box and expects to ship the product by the end of this year.
Lewis said that Zenith expects to ship the product this fall.