GB1346607A – Data transmission system
– Google Patents
GB1346607A – Data transmission system
– Google Patents
Data transmission system
Info
Publication number
GB1346607A
GB1346607A
GB2140371A
GB2140371A
GB1346607A
GB 1346607 A
GB1346607 A
GB 1346607A
GB 2140371 A
GB2140371 A
GB 2140371A
GB 2140371 A
GB2140371 A
GB 2140371A
GB 1346607 A
GB1346607 A
GB 1346607A
Authority
GB
United Kingdom
Prior art keywords
lines
pulses
output
group
levels
Prior art date
1970-02-12
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2140371A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1970-02-12
Filing date
1971-04-19
Publication date
1974-02-13
1971-04-19
Application filed by Philips Electronic and Associated Industries Ltd
filed
Critical
Philips Electronic and Associated Industries Ltd
1974-02-13
Publication of GB1346607A
publication
Critical
patent/GB1346607A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L25/00—Baseband systems
H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
H04L25/40—Transmitting circuits; Receiving circuits
H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
H04L25/4919—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using balanced multilevel codes
Abstract
1346607 Digital transmission; multi-level coding PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 April 1971 [12 Feb 1970] 21403/71 Heading H4P Binary signals from a source are divided into groups of k bits, where k = at least 2, which are coded into 2n + 1 (equal to at least 5) amplitude levels for transmission, the series having spectral zeros at determined positions. Binary signals are applied to a coder 4 having a multi-level output of at least five levels applied through a low pass filter to an amplitude or frequency modulator 6, also fed by oscillator 7. Spectral and zero points are arranged to occur at prescribed positions in the frequency spectrum which may be utilized for co-transmitting pilot signals. The output is passed through a band pass filter 8 and amplifier 9 to line 10. In the receiver, the order of components 5-9 is reversed. The output from low pass filter 15 is full wave rectified at 28 and multi-level decoded at 30, 31 providing a binary series corresponding to the input to 17. The multi-level coder comprises a pulse group analyzer 18 analyzing successive groups of k binary pulses and supplies to n parallel lines a binary series characteristic of each group. At each instance not more than one of the m output lines has a value of “1” and the number of pulses in the series is smaller for all lines than the number of pulses k in the analyzed group. All lines incorporate a mutually equal pseudoternary code converter 19-21 and m-1 lines has an amplitude multiplying device 22, 23 having factors of x2, x3 respectively the outputs of which are combined in a linear adder 24 giving out a multi level pulse series having 2m + 1 levels. In the embodiment m = 3 output lines and k = 2 pulses per group hence the correspondence is as follows:- i.e. a 1 pulse on any line identifies the first three groups and 0’s on all lines the fourth group from which the converter 19 derives levels – 1, 0, +1, multiplier 22 derives -2, 0, +2 and multiplier 23 the levels – 3, 0, + 3 all of which are applied to adder 24 and passed to the transmission line via components 5-9 previously described. By coding in the above manner (Gray code) it is assumed that only one of the pulses in each group k will be erroneous if the interferences are not too large. For introducing spectral zero points a digital filter is used. Output filter 5 may also be replaced by a digital filter (65), Fig. 9 (not shown), comprising a cascade of shift register elements (68-71) advanced by multiplied clock pulses from (74).
GB2140371A
1970-02-12
1971-04-19
Data transmission system
Expired
GB1346607A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NL7001968A
NL7001968A
(en)
1970-02-12
1970-02-12
Publications (1)
Publication Number
Publication Date
GB1346607A
true
GB1346607A
(en)
1974-02-13
Family
ID=19809306
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2140371A
Expired
GB1346607A
(en)
1970-02-12
1971-04-19
Data transmission system
Country Status (12)
Country
Link
US
(1)
US3723880A
(en)
JP
(1)
JPS5133369B1
(en)
AT
(1)
AT306797B
(en)
BE
(1)
BE762905A
(en)
BR
(1)
BR7100892D0
(en)
CA
(1)
CA929269A
(en)
CH
(1)
CH527529A
(en)
DK
(1)
DK131259B
(en)
FR
(1)
FR2079388B1
(en)
GB
(1)
GB1346607A
(en)
NL
(1)
NL7001968A
(en)
SE
(1)
SE365367B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2455989A
(en)
*
2007-12-27
2009-07-01
Namik Bardhi
Sending a signal on a single line representing two data bits on a pair of input lines, and converting back to data bits on a pair of output lines at a receive
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NL7012827A
(en)
*
1970-08-29
1972-03-02
US3988676A
(en)
*
1971-05-17
1976-10-26
Milgo Electronic Corporation
Coding and decoding system with multi-level format
US3832490A
(en)
*
1972-10-13
1974-08-27
Co Ind Des Communication Cit A
Coder for increase of transmission speed
GB1592556A
(en)
*
1976-10-28
1981-07-08
Rixon
Quadrature-amplitude-modulation data transmission systems and transmitters
FR2438943A1
(en)
*
1978-10-09
1980-05-09
Ibm France
DATA TRANSMISSION METHOD AND DEVICE FOR CARRYING OUT SAID METHOD
JPS5854127U
(en)
*
1981-10-05
1983-04-13
ミツミ電機株式会社
surface wave device
US4841281A
(en)
*
1987-06-16
1989-06-20
Westinghouse Electric Corp.
Apparatus for controlling a switching amplifier
US5444737A
(en)
*
1993-05-05
1995-08-22
National Semiconductor Corporation
Wireless data transceiver
US5550865A
(en)
*
1993-05-05
1996-08-27
National Semiconductor Corporation
Frequency modulator for data transceiver
US5640605A
(en)
*
1994-08-26
1997-06-17
3Com Corporation
Method and apparatus for synchronized transmission of data between a network adaptor and multiple transmission channels using a shared clocking frequency and multilevel data encoding
US6324602B1
(en)
*
1998-08-17
2001-11-27
Integrated Memory Logic, Inc.
Advanced input/output interface for an integrated circuit device using two-level to multi-level signal conversion
JP2000324184A
(en)
*
1999-05-10
2000-11-24
Oki Electric Ind Co Ltd
Transmission front end
US6477592B1
(en)
1999-08-06
2002-11-05
Integrated Memory Logic, Inc.
System for I/O interfacing for semiconductor chip utilizing addition of reference element to each data element in first data stream and interpret to recover data elements of second data stream
US6937664B1
(en)
2000-07-18
2005-08-30
Integrated Memory Logic, Inc.
System and method for multi-symbol interfacing
US7221711B2
(en)
*
2002-03-27
2007-05-22
Woodworth John R
Multilevel data encoding and modulation technique
GB0606055D0
(en)
*
2006-03-25
2006-05-03
Scient Generics Ltd
Non-contact wheel encoder
Family Cites Families (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3337863A
(en)
*
1964-01-17
1967-08-22
Automatic Elect Lab
Polybinary techniques
NL142035B
(en)
*
1964-02-08
1974-04-16
Philips Nv
TRANSMISSION SYSTEM FOR TRANSMISSION OF TWO-VALUED INFORMATION PULSES WITH SYNCHRONIZATION IN THE RECEIVER ON RECEIVED SIGNAL TRANSFERS.
FR1471769A
(en)
*
1965-03-20
1967-03-03
Philips Nv
Code translator
FR1463043A
(en)
*
1965-09-20
1966-06-03
Trt Telecom Radio Electr
Packaging of binary information for transmission
FR1529567A
(en)
*
1966-08-24
1968-06-21
Telecomm Radioelectriques & Te
Methods of conditioning binary information for transmission
US3560856A
(en)
*
1966-12-29
1971-02-02
Nippon Electric Co
Multilevel signal transmission system
NL157472B
(en)
*
1968-10-02
1978-07-17
Philips Nv
RECEIVER FOR RECEPTION OF PRESCRIBED TRANSMISSION BAND INFORMATION PULSE SIGNALS.
US3601702A
(en)
*
1969-03-17
1971-08-24
Gte Automatic Electric Lab Inc
High speed data transmission system utilizing nonbinary correlative techniques
1970
1970-02-12
NL
NL7001968A
patent/NL7001968A/xx
not_active
Application Discontinuation
1971
1971-02-01
US
US00111378A
patent/US3723880A/en
not_active
Expired – Lifetime
1971-02-09
SE
SE01597/71A
patent/SE365367B/xx
unknown
1971-02-09
DK
DK57571AA
patent/DK131259B/en
unknown
1971-02-09
CH
CH190271A
patent/CH527529A/en
not_active
IP Right Cessation
1971-02-09
AT
AT105471A
patent/AT306797B/en
not_active
IP Right Cessation
1971-02-09
BR
BR892/71A
patent/BR7100892D0/en
unknown
1971-02-10
CA
CA104961A
patent/CA929269A/en
not_active
Expired
1971-02-12
JP
JP46005902A
patent/JPS5133369B1/ja
active
Pending
1971-02-12
BE
BE762905A
patent/BE762905A/en
unknown
1971-02-12
FR
FR7104770A
patent/FR2079388B1/fr
not_active
Expired
1971-04-19
GB
GB2140371A
patent/GB1346607A/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2455989A
(en)
*
2007-12-27
2009-07-01
Namik Bardhi
Sending a signal on a single line representing two data bits on a pair of input lines, and converting back to data bits on a pair of output lines at a receive
Also Published As
Publication number
Publication date
DK131259C
(en)
1975-11-17
NL7001968A
(en)
1971-08-16
JPS5133369B1
(en)
1976-09-18
BR7100892D0
(en)
1973-04-10
DE2103995A1
(en)
1971-08-26
CH527529A
(en)
1972-08-31
US3723880A
(en)
1973-03-27
FR2079388A1
(en)
1971-11-12
FR2079388B1
(en)
1975-01-17
BE762905A
(en)
1971-08-12
SE365367B
(en)
1974-03-18
AT306797B
(en)
1973-04-25
DK131259B
(en)
1975-06-16
DE2103995B2
(en)
1977-06-23
CA929269A
(en)
1973-06-26
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Legal Events
Date
Code
Title
Description
1974-07-03
PS
Patent sealed [section 19, patents act 1949]
1989-12-20
PCNP
Patent ceased through non-payment of renewal fee
