EP0334669A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of and apparatus for facsimile communications
Assignee: Oki Electric Industry Co Ltd
•
Filing: 1989-03-23
•
Granted: —
•
Expires: 2009-03-23
Abstract
Abstract A facsimile apparatus (2) is connected to another (5) through a communication network (NW1) that may include a network of relative good transmission quality (e.g. a conventional wire network) (NW1A) and a network of relatively bad quality (e.g. a mobile 'phone network) (NW1B). If the selected transmission path is of good quality, transmission is carried out in a conventional manner. However, in the event that the transmission path is of relatively bad quality, an adaptive type error control means is utilised for error correction in response to the quality of the transmission path.
Inventors
- 👤 Isao C/O Oki Electric Yoshida
- 👤 Hidetoshi C/O Oki Electric Inoue
- 👤 Kanji C/O Oki Electric Arai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 16:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/333; H04N1/33346; H04N1/33307
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A pair of facsimile signal converting apparatuses arranged facing each other, in facsimile communications between standard facsimile apparatuses mediated by a communication network composed of networks with good and bad transmission quality both networks being interspersed between said facsimile apparatuses, so as to put at least a fraction of said communicaton network therebetween, comprising: (a) means including a standard transmission control procedure for interfacing with said standard facsimile apparatuses; (b) means including a connection control procedure for connection with said communicaton network; (c) means for judging the channel quality of said network; and (d) adaptive control type error control means for error correction responsive to said channel quality of said network.
Claim 2
Dependent Claim
111 words
A pair of facsimile signal converting apparatuses arranged facing each other, in facsimile communications between standard facsimile apparatuses mediated by a communication network composed of networks with good and bad transmission quality both networks being interspersed between said facsimile apparatuses, so as to put at least a fraction of said communicaton network therebetween, comprising: (a) means including a standard transmission control procedure for interfacing with said standard facsimile apparatuses; (b) means including a connection control procedure for connection with said communicaton network; (c) means for judging the channel quality of said network; and (d) adaptive control type error control means for error correction responsive to said channel quality of said network.
Claim 3
Dependent Claim
30 words
A pair of facsimile signal converting apparatus accoridng to Claim 1, wherein said adaptive control type error control means assures powerful error control when said channel quality is severely deteriorated.
Claim 4
Dependent Claim
37 words
A pair of facsimile signal converting apparatus according to Claim 1, wherein at least one of said facsimile signal converting apparatuses is disposed at a node of said communication nework or in the vicinity of the same.
Claim 5
Dependent Claim
79 words
A facsimile apparatus for a communication network composed of networks with good and bad transmission qualities, comprising: (a) means including a standard transmission control procedure; (b) means including a special transmission control procedure which has an adaptive control type error control function serving to judge the conditions of the channel of said communication network for error control responsive to said conditions; and (c) means for selecting either of said standard transmission control procedure and said special tranmission control procedure.
Claim 6
Dependent Claim
79 words
A facsimile apparatus for a communication network composed of networks with good and bad transmission qualities, comprising: (a) means including a standard transmission control procedure; (b) means including a special transmission control procedure which has an adaptive control type error control function serving to judge the conditions of the channel of said communication network for error control responsive to said conditions; and (c) means for selecting either of said standard transmission control procedure and said special tranmission control procedure.
Claim 7
Dependent Claim
26 words
A facsimile apparatus according to Claim 4, wherein said adaptive control type error control means assures powerful error control when said channel quality is severly deteriorated.
Claim 8
Independent Claim
149 words
A method of facsimile communications between first and second standard facsimile apparatuses, said apparatuses being disposed facing each other through a communication network composed of networks with good and bad transmission quality both networks being interspersed between said apparatuses, so as to put at least a fraction of said communication network therebetween, said method comprising the steps of: (a) detecting a second facsimile signal issued from said second facsimile apparatus; (b) judging the quality of a communication channel for use in said communication network based upon the intensity of said second facsimile signal; (c) detecting a first facsimile signal issued from said first facsimile apparatus; (d) demodulating said first facsimile signal; (e) applying predetermined error control to the demodulated signal based upon said judgment on the quality of said communication channel; (f) modulating the signal so applied to the error control; and (g) sending out the singal so modulated.
Claim 9
Independent Claim
149 words
A method of facsimile communications between first and second standard facsimile apparatuses, said apparatuses being disposed facing each other through a communication network composed of networks with good and bad transmission quality both networks being interspersed between said apparatuses, so as to put at least a fraction of said communication network therebetween, said method comprising the steps of: (a) detecting a second facsimile signal issued from said second facsimile apparatus; (b) judging the quality of a communication channel for use in said communication network based upon the intensity of said second facsimile signal; (c) detecting a first facsimile signal issued from said first facsimile apparatus; (d) demodulating said first facsimile signal; (e) applying predetermined error control to the demodulated signal based upon said judgment on the quality of said communication channel; (f) modulating the signal so applied to the error control; and (g) sending out the singal so modulated.
Claim 10
Independent Claim
149 words
A method of facsimile communications between first and second facsimile apparatuses mediated by a communication network composed of networks with good and bad transmission qualities, both networks being interspersed between said apparatuses, said apparatuses including a standard transmission control procedure as well as a special transmission control procedure having an adaptive control type error control function assuring error control responsibly to channel conditions, said method comprising: (a) detecting a second facsimile signal issued from the second facsimile apparatus; (b) judging the quality of communication channels for use in said communication network based upon the intensity of siad second fracsimile signal; (c) selecting either of said standard transmission control procedure and said special transmission control procedure based upon said judgement on said quality of the communication channel; and (d) sending out said first facsimile signal issued from said first facsimile apparatus to said second facsimile apparatus through said selected means.
Claim 11
Independent Claim
149 words
A method of facsimile communications between first and second facsimile apparatuses mediated by a communication network composed of networks with good and bad transmission qualities, both networks being interspersed between said apparatuses, said apparatuses including a standard transmission control procedure as well as a special transmission control procedure having an adaptive control type error control function assuring error control responsibly to channel conditions, said method comprising: (a) detecting a second facsimile signal issued from the second facsimile apparatus; (b) judging the quality of communication channels for use in said communication network based upon the intensity of siad second fracsimile signal; (c) selecting either of said standard transmission control procedure and said special transmission control procedure based upon said judgement on said quality of the communication channel; and (d) sending out said first facsimile signal issued from said first facsimile apparatus to said second facsimile apparatus through said selected means.
Claim 12
Dependent Claim
96 words
Facsimile apparatus (2, 3; 4, 5) for connection to another thereof through communication networks (NW1) that may include both a network of relatively good (NW1A) and bad (NW1B) quality, including means (3; 4) for establishing a standard transmission connection to the networks for use with a relatively good quality communication path through the networks, and characterised by means for determining the quality of the communication path established through the networks, and adaptive error control means for error correction responsive to the quality of the communication path for use when said path is of relatively bad quality.
Claim 13
Dependent Claim
96 words
Facsimile apparatus (2, 3; 4, 5) for connection to another thereof through communication networks (NW1) that may include both a network of relatively good (NW1A) and bad (NW1B) quality, including means (3; 4) for establishing a standard transmission connection to the networks for use with a relatively good quality communication path through the networks, and characterised by means for determining the quality of the communication path established through the networks, and adaptive error control means for error correction responsive to the quality of the communication path for use when said path is of relatively bad quality.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.