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US 4,100,377 AGranted
Packet transmission of speech
AssigneeBell Telephone Laboratories, Incorporated
InventorJames Loton Flanagan
Life of this patent
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AssigneeBell Telephone Laboratories, Incorporated
InventorJames Loton Flanagan
Estimating the term…
A multiplex transmission system is disclosed in which speech activity is detected as a sequence of talkspurts and intervening silent intervals. The speech information is encoded and accumulated in a buffer store by omitting the silent intervals. A time stamp is associated with each talkspurt code burst to permit approximate reconstruction of the talkspurt time structure at the receiver. The talkspurt code bursts are assembled into packets of optimum size for transmission on shared transmission facilities, such as a Time Assignment Speech Interpolation (TASI) system. The assembled talkspurt packets can be encoded by an adaptive technique responsive to the loading on the transmission facilities and can be transmitted at a rate faster than real-time speech generation to accommodate high-level usage on the shared transmission facilities.
A multiplex transmission system for transmitting digital signals from a plurality of signal sources, at least one of which is a speech signal source, on common transmission facilities, said system comprising:
A speech packet generator comprising:
A time assignment speech interpolation system comprising:
A multiplex transmission system for transmitting speech and data signals comprising:
A multiplex loop transmission system for transmitting speech signals comprising:
Dependencies are inferred from the claim text.