Arthur J Larsen

US Patent:

42362458, Nov 25, 1980

Filed:

Apr 17, 1979

Appl. No.:

6/030811

Inventors:

Stanley L. Freeny - Middletown NJ
Arthur B. Larsen - Colts Neck NJ
Thomas J. Pedersen - Lincroft NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04J 602

US Classification:

370 94

Abstract:

Communication between a plurality of data terminals (101(1) to 101(b)) serially interconnected with a main terminal (102) is provided by data frames or packets having a data portion for accommodating a burst of data preceeded by a header portion for accommodating address data followed by an empty/full "flag" bit indicating whether the addressee station has withdrawn the data burst. If a terminal has a data burst to send, it locates an empty packet, inserts the addressee designation in the packet subsequent to any prior address that the packet might contain, interposes delay in the passage therethrough of the packet so that the duration is increased to accommodate the new address and overwrites the data burst into the data portion. The main terminal detects when the data burst is withdrawn and signals the originating terminal to remove the data delay.

US Patent:

42375533, Dec 2, 1980

Filed:

Dec 26, 1978

Appl. No.:

5/973181

Inventors:

Arthur B. Larsen - Colts Neck NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04J 600

US Classification:

370 89

Abstract:

Communication between a plurality of data stations (100(1)-100(N)) serially interconnected by way of a line (101) arranged in a ring is provided by bit interleaved data packets. A control station generates framing signals to designate the start of each packet, staggering the packets so that only one packet header appears on the line at a time. Processing equipment (114) at each station monitors all the headers, seizing "empty" packets if the station has a data burst to send and reading the data burst if the packet is addressed thereto.

US Patent:

44919530, Jan 1, 1985

Filed:

Sep 9, 1982

Appl. No.:

6/416380

Inventors:

Jules A. Bellisio - Wall Township, Monmouth County NJ
Arthur B. Larsen - Colts Neck NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H03K 1322

US Classification:

375 27

Abstract:

A dual mode encoding/decoding technique for use in digital systems wherein transmitted digital words are limited, on average, to an alotted number of bits. The transmitted digital words are coded into first and second modes. The first coding mode utilizes predictive differential coding to provide a precision which can be greater than that obtainable by coding information solely with the allotted number of bits, while the second mode assures at least a minimum precision for the allotted number of bits. The first coding mode is transmitted as long as a preselected precision is provided. If not, the second coding mode is transmitted. In the disclosed embodiment, the dual mode encoding/decoding technique is applied to the transmission of color video signals.