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Voice Cloning - Software Recreates Voices Of Living & Dead

by C/O Diogenes Friday, Jul. 04, 2003 at 8:50 AM

AT&T Labs will start selling speech software that it says is so good at reproducing the sounds, inflections and intonations of a human voice that it can re-create voices and even bring the voices of long-dead celebrities back to life.

Voice Cloning - Software Recreates Voices Of Living & Dead

By Lisa Guernsey

New York Times


AT&T Labs will start selling speech software that it says is so good at reproducing the sounds, inflections and intonations of a human voice that it can re-create voices and even bring the voices of long-dead celebrities back to life.


The software, which turns printed text into synthesized speech, makes it possible for a company to use recordings of a person's voice to utter new things that the person never said.


The software, called Natural Voices, is not flawless -- its utterances still contain a few robotic tones and unnatural inflections -- and competitors question whether the software is a substantial step up from existing products. But some of those who have tested the technology say it is the first text-to-speech software to raise the specter of voice cloning, replicating a person's voice so perfectly that the human ear cannot tell the difference.


``If ABC wanted to use Regis Philbin's voice for all of its automated customer-service calls, it could,'' said Lawrence R. Rabiner, vice president for AT&T Labs Research.


Potential customers for the software, which is priced in the thousands of dollars, include telephone call centers, companies that make software that reads digital files aloud and makers of automated voice devices.


James R. Fruchterman, the chief executive of Benetech, a non-profit organization that uses technology in social-service projects, tested the software along with a dozen people who evaluate technology for blind people, and they said they were impressed.


``Natural Voices gets into the gray area,'' he said, ``where there is plausible deniability that it is a machine.''


Rabiner said he is excited about the possibility of resurrecting renowned voices, like that of Harry Caray, the Chicago Cubs announcer who delivered rousing play-by-play broadcasts. ``There are probably hours of recordings in archives,'' he said. Wouldn't it be great, he asked, if Harry Caray's voice could once again be broadcasting in Wrigley Field?


Ownership issues


The technology raises several questions. Who, for example, owns the rights to a celebrity's voice? Rabiner predicted that new contracts will be drawn that include voice-licensing clauses.


With computer-generated characters already appearing in place of real ones in some movies, will computer-synthesized voices compete with those of live actors as well?


And although scientists say the technology is not yet good enough to perpetrate fraud, synthesized voices may eventually be capable of tricking people into thinking that they were getting phone calls from people they know.


For now, technical limitations may temper any worries that a person's voice could be lifted without permission.


To build the software that re-creates unique voices -- which AT&T Labs is calling its ``custom voice'' product -- a person must first go to a studio where engineers record 10 hours to 40 hours of readings. Texts range from business news reports to nonsense babble. The recordings are then chopped into fragments of sounds and sorted into databases. When the software processes a text, it retrieves the sounds and re-assembles them to form new sentences.


Gains in synthetic speech


In the case of long-dead celebrities, archival recordings could be used in the same way.


Other companies and research centers, like IBM Research and Lernout and Hauspie, are also experimenting with this technique -- which is called concatenative speech synthesis -- to improve the quality of text-to-speech software. It is a big step up, engineers say, from the speech engines that were built from whole words that had been pre-recorded. And it is also a vast improvement, some say, from the entirely computer-generated and therefore robotic sounds that are used in many versions of text-to-speech software on the market today.


Now aided by the declining cost and increasing speed of microprocessors, far smoother sentences are possible, Rabiner said. He said that the speech team at AT&T Labs, led by Juergen Schroeter, an expert in speech synthesis, had created a more refined form of the concatenative technique by breaking a person's voice into ``the smallest number of units possible.''


A demonstration of the technology will be available on the Web beginning today at, said Michael Dickman, a spokesman for AT&T Labs.


Still, many engineers are skeptical of claims of a completely simulated voice that is almost indistinguishable from that of a human.


Now the pressure is on to perfect the technology. Analysts at McKinsey & Co. have predicted that the market for text-to-speech software will reach more than billion in the next five years. In addition to customers like call centers and manufacturers of automated voice systems, the software could also be used by publishers of video games and books-on-tape and automobile manufacturers whose cars are equipped with software that gives driving directions. In the near future, engineers have said they expect people will want high-end speech technology that enables them to interact at length with their cell phones and Palm organizers, instead of typing on and squintingat a tiny screen.

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Listed below are the 10 latest comments of 12 posted about this article.
These comments are anonymously submitted by the website visitors.
If this is now making it... Diogenes Friday, Jul. 04, 2003 at 8:52 AM
AT&T Sheepdog Friday, Jul. 04, 2003 at 9:09 AM
No Doubt activist community Friday, Jul. 04, 2003 at 11:23 AM
Of course... Diogenes Friday, Jul. 04, 2003 at 2:06 PM
who said what when cuzin it Friday, Jul. 04, 2003 at 3:26 PM
hmmmm fresca Sunday, Jul. 06, 2003 at 10:10 AM
Which Osama? Which Video? Diogenes Sunday, Jul. 06, 2003 at 10:51 AM
PsyOps Detector Sunday, Jul. 06, 2003 at 10:55 AM
sphere circle Sunday, Jul. 06, 2003 at 11:44 AM
Take some time off fresca Sunday, Jul. 06, 2003 at 9:23 PM
SOP Sheepdog Monday, Jul. 07, 2003 at 6:11 AM

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