US4939767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for transmitting image data on a telephone network or equivalent
Assignee: Sanyo Electric Co Ltd
•
Filing: 1988-05-17
•
Granted: 1990-07-03
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Expires: 2008-05-17
Abstract
Abstract A system for transmitting image data on a telephone network or equivalent, which typically includes video or visual telephones as apparatus of sending part and receiving part. In the video telephone of sending part, when an image data sending key is operated, a DTMF signal generator included in a modem is started to operated and a specified DTMF signal, for example, DTMF-A signal or DTMF-B signal is sent as a signal DTMF-DTA to a telephone circuit through a network control unit for approximate 300 milliseconds. Succeedingly, in spite of presence or absence of a responsive signal from the video telephone of receiving part, a non-signal state is formed for approximate 75 milliseconds, immediately thereafter, the image data is sent from the video telephone of sending part at a transmission speed of 4,800 bps or 2,400 bps. In the video telephone of receiving part, when the signal DTMF-DTA, that is, the above described DTMF-A signal or DTMF-B signal is continuously received for approximate 250 milliseconds, a modem thereof is started at 4,800 bps or 2,400 bps, and the image data being sent from the video telephone of sending part is received.
Inventors
- 👤 Yoshinori Saito
- 👤 Hiroyuki Hayasaki
- 👤 Hisashi Matsuyama
- 👤 Hisaharu Nakashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/327; H04N1/32789; H04N1/32791; H04N1/32702; H04N1/333; H04N1/33307; H04N1/33323; H04N1/33392; H04N7/00; H04N7/14; H04N7/141; H04N7/147; H04N2201/00; H04N2201/32; H04N2201/333; H04N2201/33307; H04N2201/33342; H04N2201/3335; H04N2201/33371
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
136 words
A method for transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between apparatuses of a sending party and a receiving party through said telephone network; (b) sending the image data from the apparatus of the sending party to the apparatus of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending a tone signal having a specified frequency for a predetermined time period in response to an image data sending command; and (c) receiving in the apparatus of the receiving party the image data being sent from the apparatus of the sending party only when the specified tone signal is continuously received for the predetermined time period.
Claim 2
Independent Claim
136 words
A method for transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between apparatuses of a sending party and a receiving party through said telephone network; (b) sending the image data from the apparatus of the sending party to the apparatus of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending a tone signal having a specified frequency for a predetermined time period in response to an image data sending command; and (c) receiving in the apparatus of the receiving party the image data being sent from the apparatus of the sending party only when the specified tone signal is continuously received for the predetermined time period.
Claim 3
Dependent Claim
24 words
A method in accordance with claim 1, wherein said step (b) includes a step of generating a DTMF signal as said specified tone signal.
Claim 4
Dependent Claim
79 words
A method in accordance with claim 1, further comprising the steps of (d) sending at least one command signal for designating a transmission mode from the apparatus of the sending party to the apparatus of the receiving party; and (e) returning an acknowledge signal or negative acknowledge signal from the apparatus of the receiving party to the apparatus of the sending party when said command signal is received, said steps (d) and (e) being executed before said step (b).
Claim 5
Dependent Claim
47 words
A method in accordance with claim 3, further comprising the steps of (f) sending said image data in accordance with a transmission mode which is designated by said command signal from the apparatus of the sending party when the acknowledge signal is returned in said step (e).
Claim 6
Dependent Claim
51 words
A method in accordance with claim 4, further comprising the steps of (g) sending said image data through a predetermined transmission mode from the apparatus of the sending party when the negative acknowledge signal is returned in said step (e) or when no responsive signal is returned in said step (e).
Claim 7
Dependent Claim
53 words
A method in accordance with claim 3, wherein in the case where confirmation of the transmission mode has been made between the apparatus of the both parties in said steps (d) and (e), after said image data sending command, said steps (b) and (c) are executed without executing said steps (d) and (e).
Claim 8
Dependent Claim
19 words
A method in accordance with claim 5, wherein said predetermined transmission mode is a monochrome image data transmission mode.
Claim 9
Dependent Claim
45 words
A method in accordance with claim 3, wherein the step of sending includes sending a plurality of command signals for designating respective transmission modes, at least two tone signals which are different from each other being utilized respectively as two of said command in signals.
Claim 10
Dependent Claim
14 words
A method in accordance with claim 8, wherein the tone signals are DTMF signals.
Claim 11
Dependent Claim
27 words
A method in accordance with claim 5, wherein command data is sent as said command signal in said step (d), and further comprising decoding the command data.
Claim 12
Dependent Claim
33 words
A method in accordance with claim 10, further comprising the steps of (h) sending a tone signal having a specified frequency from the apparatus of the sending party prior to said step (d).
Claim 13
Dependent Claim
19 words
A method in accordance with claim 11, wherein the tone signal having said specified frequency is a DTMF signal.
Claim 14
Dependent Claim
78 words
A method in accordance with claim 1, further comprising the steps of (i) sending a request for sending the image data from the apparatus of the receiving party to the apparatus of the sending party; and (j) returning the image data in response to the request for sending the image data from said apparatus of the receiving party to said apparatus of the sending party when a polling mode is allowed in said apparatus of the receiving party.
Claim 15
Independent Claim
86 words
A method for transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between apparatuses of both parties through said telephone network; (b) sending a tone signal having a specified frequency from any one of the apparatuses of the both parties; and (c) sending the image data regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after the sending of the tone signal.
Claim 16
Independent Claim
86 words
A method for transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between apparatuses of both parties through said telephone network; (b) sending a tone signal having a specified frequency from any one of the apparatuses of the both parties; and (c) sending the image data regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after the sending of the tone signal.
Claim 17
Independent Claim
147 words
A method for transmitting image data in a video or visual telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visual telephone of both parties through a telephone network; (b) sending the image data from the video or visual telephone of the sending party to the video or visual telephone of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after a specified DTMF signal is sent for a predetermined time period in response to an image data sending command; and (c) receiving in the video or visual telephone of the receiving party the image data being sent from the video or visual telephone of the sending party only when the specified DTMF signal is continuously received for the predetermined time period.
Claim 18
Independent Claim
147 words
A method for transmitting image data in a video or visual telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visual telephone of both parties through a telephone network; (b) sending the image data from the video or visual telephone of the sending party to the video or visual telephone of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after a specified DTMF signal is sent for a predetermined time period in response to an image data sending command; and (c) receiving in the video or visual telephone of the receiving party the image data being sent from the video or visual telephone of the sending party only when the specified DTMF signal is continuously received for the predetermined time period.
Claim 19
Dependent Claim
91 words
A method in accordance with claim 15, further comprising the steps of (d) sending at least one command signal for designating a transmission mode from the video or visual telephone of the sending party to the video or visual telephone of the receiving party; and (e) returning an acknowledge signal or negative acknowledge signal from the video or visual telephone of the receiving party to the video or visual telephone of the sending party when said command signal is received, said steps (d) and (e) being executed before said step (b).
Claim 20
Dependent Claim
61 words
A method in accordance with claim 16, further comprising the steps of (f) sending said image data in accordance with a transmission mode which is designated by said command signal from the video or visual telephone of the sending party when the acknowledge signal is returned in said step (e) or when no responsive signal is returned in said step (e).
Claim 21
Dependent Claim
43 words
A method in accordance with claim 17, further comprising the steps of (g) sending said image data through a predetermined transmission mode from the video or visual telephone of the sending party when the negative acknowledge signal is returned in said step (e).
Claim 22
Dependent Claim
56 words
A method in accordance with claim 17, wherein in the case where confirmation of the transmission mode has been made between the video or visual telephones of the both parties in said steps (d) and (e), after said image data sending command, said steps (b) and (c) are executed without executing said steps (d) and (e).
Claim 23
Dependent Claim
19 words
A method in accordance with claim 18, wherein said predetermined transmission mode is a monochrome image data transmission mode.
Claim 24
Dependent Claim
44 words
A method in accordance with claim 16, wherein the step of sending includes sending a plurality of command signals for designating respective transmission modes, at least two tone signals which are different from each other being utilized respectively as two of said command signals.
Claim 25
Dependent Claim
27 words
A method in accordance with claim 18, wherein command data is sent as said command signal in said step (d), and further comprising decoding the command data.
Claim 26
Dependent Claim
33 words
A method in accordance with claim 22, further comprising the steps of (h) sending a specified DTMF signal from the video or visual telephone of the sending party prior to said step (d).
Claim 27
Dependent Claim
90 words
A method in accordance with claim 15, further comprising the steps of (i) sending a request for sending the image data from the video or visual telephone of the receiving party to the video or visual telephone of the sending party; and (j) returning the image data in response to the request for sending from said video or visual telephone of the receiving party to said video or visual telephone of the sending party when a polling mode is allowed in said video or visual telephone of the receiving party.
Claim 28
Independent Claim
92 words
A method for transmitting image data in video or visual telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visual telephones of both parties through a telephone network; (b) sending a specified DTMF signal from any one of the video or visual telephones of the both parties; and (c) sending the image data regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after the sending of the specified DTMF signal.
Claim 29
Independent Claim
92 words
A method for transmitting image data in video or visual telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visual telephones of both parties through a telephone network; (b) sending a specified DTMF signal from any one of the video or visual telephones of the both parties; and (c) sending the image data regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after the sending of the specified DTMF signal.
Claim 30
Independent Claim
102 words
A system for transmitting image data on a telephone network, comprising: means for establishing a telephone circuit between apparatuses for both parties through said telephone network or equivalent; means for sending a tone signal having a specified frequency from any one of the apparatuses of the both parties prior to sending the image data from any one of the apparatuses of the both parties; and means for sending the image data regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending the tone signal.
Claim 31
Independent Claim
102 words
A system for transmitting image data on a telephone network, comprising: means for establishing a telephone circuit between apparatuses for both parties through said telephone network or equivalent; means for sending a tone signal having a specified frequency from any one of the apparatuses of the both parties prior to sending the image data from any one of the apparatuses of the both parties; and means for sending the image data regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending the tone signal.
Claim 32
Independent Claim
110 words
A system for transmitting image data on a telephone network, comprising: first means for establishing a telephone circuit between the apparatuses of both parties through said telephone network; second means for sending the image data from the apparatus of the sending party to the apparatus of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party after sending a specified signal for a predetermined time period in response to an image data sending command; and third means for receiving in the apparatus of the receiving party the image data being sent from the apparatus of the sending party.
Claim 33
Independent Claim
110 words
A system for transmitting image data on a telephone network, comprising: first means for establishing a telephone circuit between the apparatuses of both parties through said telephone network; second means for sending the image data from the apparatus of the sending party to the apparatus of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party after sending a specified signal for a predetermined time period in response to an image data sending command; and third means for receiving in the apparatus of the receiving party the image data being sent from the apparatus of the sending party.
Claim 34
Dependent Claim
31 words
A system in accordance with claim 27, wherein said third means includes means for receiving the image data only when the specified signal is continuously received for a predetermined time period.
Claim 35
Independent Claim
158 words
A method of transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between an apparatus of a sending party and an apparatus of a receiving party through said telephone network; (b) sending the image data from the apparatus of the sending party to the apparatus of receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending a specified DTMF signal for a predetermined time period in response to an image data sending command; (c) starting a modem in the apparatus of the receiving party only when the specified DTMF signal is continuously received for the predetermined time period; and (d) receiving the image data being sent from the apparatus of the sending party through the modem which has been started in the step (c) in the apparatus of the receiving party.
Claim 36
Independent Claim
158 words
A method of transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between an apparatus of a sending party and an apparatus of a receiving party through said telephone network; (b) sending the image data from the apparatus of the sending party to the apparatus of receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending a specified DTMF signal for a predetermined time period in response to an image data sending command; (c) starting a modem in the apparatus of the receiving party only when the specified DTMF signal is continuously received for the predetermined time period; and (d) receiving the image data being sent from the apparatus of the sending party through the modem which has been started in the step (c) in the apparatus of the receiving party.
Claim 37
Independent Claim
95 words
A method of transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between apparatuses of two parties through said telephone network; (b) sending a specified DTMF signal from any one of the apparatuses; (c) sending the image data regardless of a presence and regardless of an absence of a response from the other of the apparatuses after sending the specified DTMF signal; and (d) starting a modem of the other one of the apparatuses only when the specified DTMF signal is continuously received for a predetermined time period.
Claim 38
Independent Claim
95 words
A method of transmitting image data on a telephone network, comprising the steps of: (a) establishing a telephone circuit between apparatuses of two parties through said telephone network; (b) sending a specified DTMF signal from any one of the apparatuses; (c) sending the image data regardless of a presence and regardless of an absence of a response from the other of the apparatuses after sending the specified DTMF signal; and (d) starting a modem of the other one of the apparatuses only when the specified DTMF signal is continuously received for a predetermined time period.
Claim 39
Independent Claim
166 words
A method of transmitting image data in video or visual telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visual telephones of a sending party and a receiving party through a telephone network; (b) sending the image data from the video or visual telephone of the sending party to the video or visual telephone of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending a specified DTMF signal for a predetermined time period in response to an image data sending command; (c) starting a modem of the video or visual telephone of the receiving party only when the specified DTMF signal is continuously received for the predetermined time period; and (d) receiving the image data sent from the video or visual telephone of the sending party through the modem of the video or visual telephone of the receiving party.
Claim 40
Independent Claim
166 words
A method of transmitting image data in video or visual telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visual telephones of a sending party and a receiving party through a telephone network; (b) sending the image data from the video or visual telephone of the sending party to the video or visual telephone of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party to the apparatus of the sending party after sending a specified DTMF signal for a predetermined time period in response to an image data sending command; (c) starting a modem of the video or visual telephone of the receiving party only when the specified DTMF signal is continuously received for the predetermined time period; and (d) receiving the image data sent from the video or visual telephone of the sending party through the modem of the video or visual telephone of the receiving party.
Claim 41
Independent Claim
123 words
A method of transmitting image data in video or visible telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visible telephones of two parties through said telephone network; (b) sending a specified DTMF signal from any one of the video or visible telephones prior to sending image data from any one of the video or visible telephones; (c) sending the image data regardless of a presence and regardless of an absence of a response from the other of the video or visible telephones after sending the specified DTMF signal; and (d) starting a modem of the other one of the video or visible telephones only when the specified DTMF signal is continuously received for a predetermined time period.
Claim 42
Independent Claim
123 words
A method of transmitting image data in video or visible telephone system, comprising the steps of: (a) establishing a telephone circuit between video or visible telephones of two parties through said telephone network; (b) sending a specified DTMF signal from any one of the video or visible telephones prior to sending image data from any one of the video or visible telephones; (c) sending the image data regardless of a presence and regardless of an absence of a response from the other of the video or visible telephones after sending the specified DTMF signal; and (d) starting a modem of the other one of the video or visible telephones only when the specified DTMF signal is continuously received for a predetermined time period.
Claim 43
Independent Claim
107 words
A system of transmitting image data on a telephone network, comprising: means for establishing a telephone circuit between apparatus for two parties through said telephone network; means for sending a specified DTMF signal from any one of the apparatuses prior to sending image data from any one of the apparatuses; means for sending the image data from any one of the apparatus regardless of a presence and regardless of an absence of a response from the other of the apparatuses; and means for starting a modem of the other one of the apparatuses only when the specified DTMF signal is continuously received for a predetermined time period.
Claim 44
Independent Claim
107 words
A system of transmitting image data on a telephone network, comprising: means for establishing a telephone circuit between apparatus for two parties through said telephone network; means for sending a specified DTMF signal from any one of the apparatuses prior to sending image data from any one of the apparatuses; means for sending the image data from any one of the apparatus regardless of a presence and regardless of an absence of a response from the other of the apparatuses; and means for starting a modem of the other one of the apparatuses only when the specified DTMF signal is continuously received for a predetermined time period.
Claim 45
Independent Claim
151 words
A system of transmitting image data on a telephone network, comprising first means for establishing a telephone circuit between apparatus of a sending party and an apparatus of a receiving party through said telephone network; second means for sending the image data from the apparatus of the sending party to the apparatus of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party after sending a specified DTMF signal for a predetermined time period in response to an image data sending command; third means for starting a modem of the apparatus of receiving party only when the specified DTMF signal is continuously received for the predetermined time period; and fourth means for receiving the image data being sent from the apparatus of the sending party through the modem which has been started in the apparatus of the receiving party.
Claim 46
Independent Claim
151 words
A system of transmitting image data on a telephone network, comprising first means for establishing a telephone circuit between apparatus of a sending party and an apparatus of a receiving party through said telephone network; second means for sending the image data from the apparatus of the sending party to the apparatus of the receiving party regardless of a presence and regardless of an absence of a response from the apparatus of the receiving party after sending a specified DTMF signal for a predetermined time period in response to an image data sending command; third means for starting a modem of the apparatus of receiving party only when the specified DTMF signal is continuously received for the predetermined time period; and fourth means for receiving the image data being sent from the apparatus of the sending party through the modem which has been started in the apparatus of the receiving party.
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USPTO Annuity & Maintenance Windows
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| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |