Featured Research

from universities, journals, and other organizations

Bell Labs Developing Stereo Sound For Desktop Communications

Date:
January 5, 2000
Source:
Bell Labs/lucent Technologies
Summary:
Scientists from Bell Labs, the research and development arm of Lucent Technologies have announced a technological breakthrough in audio research, for the first time making it possible to deliver full-duplex stereo sound in an audio or video conference.

Murray Hill, NJ (Dec. 16, 1999) -- Scientists from Bell Labs, the research and development arm of Lucent Technologies today announced a technological breakthrough in audio research, for the first time making it possible to deliver full-duplex stereo sound in an audio or video conference.

The Bell Labs stereo technology can be used in an Internet Protocol (IP) environment and incorporated into both teleconferencing and video conferencing systems. Stereo conferencing technology gives participants a better way to hear and comprehend multiple streams of conversation.

"With the rise of IP-based audio and videoconferencing, we are moving into a new age of multimedia communications that focuses on realism," says Fred Juang, head of Bell Labs acoustics and speech research department. "To deliver on the promise of virtual collaborations, we need to recreate lifelike audio and video renditions of a physical setting. Stereo sound gives us some of the natural audio cues we get from our ears in a live meeting about who is speaking."

In creating the first stereo-based conferencing technology, Bell Labs researchers needed to tackle the extremely complex problem of stereo acoustic echo cancellation. Without echo cancellation, users would hear feedback that occurs when a speaker and a microphone are too close.

Current echo cancellation relies on an audio technique that uses single channel cancellation, which identifies one acoustic path between the speaker and the microphone. In the stereo environment this technique does not work because the sound is carried in multiple acoustic paths between the speaker and the microphone.

To overcome this, Bell Labs audio researchers developed new algorithms that modified the stereo signals in a way that allows for the correct path identification without harming the stereo sound.

Bell Labs stereo conferencing technology is expected to be integrated into a number of Lucent teleconferencing and video conferencing products including Lucent Collaborative Video, an IP-based videoconferencing system that delivers high-quality video and audio to multiple parties in a PC-based solution. Lucent also plans to license the technology to other companies for use in their conferencing products.

Lucent Technologies, headquartered in Murray Hill, N.J., designs, builds, and delivers a wide range of public and private networks, communications systems and software, data networking systems, business telephone systems, and microelectronics components. Bell Labs is the research and development arm for the company. For more information on Bell Labs multimedia communications research visit http://www.multimedia.bell-labs.com or for more on Lucent Technologies, visit http://www.lucent.com.


Story Source:

The above story is based on materials provided by Bell Labs/lucent Technologies. Note: Materials may be edited for content and length.


Cite This Page:

Bell Labs/lucent Technologies. "Bell Labs Developing Stereo Sound For Desktop Communications." ScienceDaily. ScienceDaily, 5 January 2000. <www.sciencedaily.com/releases/2000/01/000105050516.htm>.
Bell Labs/lucent Technologies. (2000, January 5). Bell Labs Developing Stereo Sound For Desktop Communications. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2000/01/000105050516.htm
Bell Labs/lucent Technologies. "Bell Labs Developing Stereo Sound For Desktop Communications." ScienceDaily. www.sciencedaily.com/releases/2000/01/000105050516.htm (accessed July 25, 2014).

Share This




More Matter & Energy News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
Powered by NewsLook.com
Robot Parking Valet Creates Stress-Free Travel

Robot Parking Valet Creates Stress-Free Travel

AP (July 23, 2014) 'Ray' the robotic parking valet at Dusseldorf Airport in Germany lets travelers to avoid the hassle of finding a parking spot before heading to the check-in desk. (July 23) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile: iPhone Android Web
          Follow: Facebook Twitter Google+
          Subscribe: RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins