GB1357799A – Data handling
– Google Patents
GB1357799A – Data handling
– Google Patents
Data handling
Info
Publication number
GB1357799A
GB1357799A
GB3297771A
GB3297771A
GB1357799A
GB 1357799 A
GB1357799 A
GB 1357799A
GB 3297771 A
GB3297771 A
GB 3297771A
GB 3297771 A
GB3297771 A
GB 3297771A
GB 1357799 A
GB1357799 A
GB 1357799A
Authority
GB
United Kingdom
Prior art keywords
potential
feedback signal
register
difference
sign
Prior art date
1970-08-24
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
GB3297771A
Inventor
Donald R Weber
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.)
Dacom Inc
Original Assignee
Dacom Inc
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.)
1970-08-24
Filing date
1971-07-14
Publication date
1974-06-26
1971-07-14
Application filed by Dacom Inc
filed
Critical
Dacom Inc
1974-06-26
Publication of GB1357799A
publication
Critical
patent/GB1357799A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M3/00—Conversion of analogue values to or from differential modulation
H03M3/02—Delta modulation, i.e. one-bit differential modulation
H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]
Abstract
1357799 Delta modulation systems DACOM Inc 14 July 1971 [24 Aug 1970] 32977/71 Heading G4H In a system for converting analogue input into differential coded signals and transmitting them to a receiver which reconstructs the analogue, the encoder, Fig. 3, produces at 28 a string of binary l’s and 0’s according to the sign of the difference between the analogue input 18 and a feedback signal 22 comprised of a first component, stored at C2, equal to the value the feedback signal had the last time the difference changed sign, and a second component derived by connecting a resistor chain 46 to a positive or negative potential in accordance with whether the output at 28 is 1 or 0 and sequentially closing switches 1, 2, 3 … n until the difference next changes sign whereupon shift register 42 is reset and switches S 1 , S 2 , 50 operated to begin a new cycle. The resistors in chain 46 are selected to give the feedback signal an S-shaped characteristic. The decoder, Fig. 6, comprises a shift register 70 through which the received encoded signal is stepped and an adaptive filter 74 which is alternately connected to a positive and a negative bandedge potential, changeover occurring whenever the two oldest bits (positions 0 and 1 of the register 70) are different, one of resistors R a , R b … R n being selected in accordance with how many next consecutive bits in register 70 are the same as the bit in position 1 to control the rate at which capacitor 76 charges or discharges towards the selected bandedge potential. The analogue input may be a T.V. video signal or a radar signal. The transmission link may include a recorder the playback speed of which is automatically controlled in dependence on the fullness of a buffer store.
GB3297771A
1970-08-24
1971-07-14
Data handling
Expired
GB1357799A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US6645970A
1970-08-24
1970-08-24
Publications (1)
Publication Number
Publication Date
GB1357799A
true
GB1357799A
(en)
1974-06-26
Family
ID=22069639
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3297771A
Expired
GB1357799A
(en)
1970-08-24
1971-07-14
Data handling
Country Status (5)
Country
Link
JP
(2)
JPS5931248B1
(en)
CA
(1)
CA957074A
(en)
DE
(1)
DE2141747C2
(en)
FR
(1)
FR2103473B1
(en)
GB
(1)
GB1357799A
(en)
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3925731A
(en)
*
1974-04-18
1975-12-09
Bell Telephone Labor Inc
Differential pulse coded system using shift register companding
FR2578204B1
(en)
*
1985-03-01
1991-11-22
Kubota Ltd
TRANSMISSION STRUCTURE FOR AGRICULTURAL TRACTOR
JPS6484882A
(en)
*
1987-09-17
1989-03-30
Mitsubishi Electric Corp
Containment and transportation carrier for semi-conductor device
FR3120419A1
(en)
2021-03-07
2022-09-09
Jean-Michel SCHULZ
Device with full control, management and steering authority for an on-board fuel or cryogenic fluid storage facility.
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3393364A
(en)
*
1965-10-23
1968-07-16
Signatron
Statistical delta modulation system
1971
1971-06-18
CA
CA116,063A
patent/CA957074A/en
not_active
Expired
1971-07-14
GB
GB3297771A
patent/GB1357799A/en
not_active
Expired
1971-08-20
DE
DE19712141747
patent/DE2141747C2/en
not_active
Expired
1971-08-24
FR
FR7130621A
patent/FR2103473B1/fr
not_active
Expired
1971-08-24
JP
JP6413071A
patent/JPS5931248B1/ja
active
Pending
1980
1980-02-04
JP
JP1234680A
patent/JPS6036657B2/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2141747A1
(en)
1972-03-02
DE2141747C2
(en)
1982-10-21
JPS5931248B1
(en)
1984-08-01
FR2103473A1
(en)
1972-04-14
CA957074A
(en)
1974-10-29
JPS5642429A
(en)
1981-04-20
JPS6036657B2
(en)
1985-08-21
FR2103473B1
(en)
1976-03-26
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Legal Events
Date
Code
Title
Description
1974-11-06
PS
Patent sealed
1987-03-04
PCNP
Patent ceased through non-payment of renewal fee
