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IEEE Membership & Staff
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| Milestone Buildings Exist
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Yes
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| Milestone Distinguishing Features
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This work combined major developments in m … This work combined major developments in multiple areas, including the first real-time implementations of narrowband LPC speech coding on digital signal processors, network protocols to enable real-time packet delivery, strategies for reconstituting speech, techniques for reconstitution of speech from packets arriving at non-uniform intervals, packet speech conferencing techniques, and interoperation over different types of packet networks (landline, Ethernet, satellite, radio). Another feature was the outstanding collaboration among organizations and across technology areas. Finally, the long-term impact is a major feature which sets this work apart, as evidenced by the wide use of VoIP and related application such as packet video. related application such as packet video.
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| Milestone Obstacles Overcome
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The network protocols did not support real … The network protocols did not support real-time speech, so new protocols had to be developed.
The narrowband (2 – 5 kbps) digital vocoder algorithms were needed due to the limited ARPAnet link rates; these algorithms did not run in real time, so they had to be modified and adapted to run on the new DSP systems which were just emerging.
Interoperability needed to be established among separate implementations of speech algorithms and protocols running at different sites, on different host computers and DSPs, over different types of networks, and with geographic separation across the US and between US and Europe. n across the US and between US and Europe.
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| Milestone Present Site Owner
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Massachusetts Institute of Technology
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| Milestone Site Access Details
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MIT Lincoln Laboratory is a secure facilit … MIT Lincoln Laboratory is a secure facility. The main entrance and lobby area is open to the public, and the Laboratory often opens its auditorium to outside events including Boston Section IEEE meetings, IEEE Life Fellow meetings, Science on Saturdays for K-12, and concerts. (Note: The Lincoln Laboratory auditorium hosts many IEEE meetings, and would be the site for a m ilestone ceremony should this proposal be accepted). eremony should this proposal be accepted).
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| Milestone Site Description
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MIT Lincoln Laboratory conducted pioneeri … MIT Lincoln Laboratory conducted pioneering R&D and experiments in packet speech, collaborating with the other organizations noted above, including USC/ISI, SRI, CHI, BBN, and others. Lincoln was a direct participant in all the milestone packet speech experiments cited above, spanning 1974-1982. In addition, in 1971, Lincoln conducted the earliest packet speech related experiments on the ARPAnet; those experiments showed the feasibility of packet speech transmission; real-time 2-way communication over the ARPAnet between Lincoln and CHI and between Lincoln and USC/ISI followed in 1974. ween Lincoln and USC/ISI followed in 1974.
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| Milestone Site Owner Approval
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Yes +
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| Milestone proposal submitted
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false +
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| Proposed Milestone IEEE Section
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Boston Section +
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| Proposed Milestone Location
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MIT Lincoln Laboratory, Lexington, MA
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| Proposed Milestone Name
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First Real-Time Speech Communication on Packet Networks +
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| Has improper value forThis property is a special property in this wiki.
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Proposed Milestone Year +
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| Modification dateThis property is a special property in this wiki.
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16 July 2012 20:13:18 +
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