Abstract A facsimile scanning conversion system which can convert a facsimile scanning at a transmitter side or a receiver side such that a picture surface received at the receiver is correctly similar to that to be transmitted from the transmitter when either one or both an index of cooperation and a scanning speed of a facsimile transmitter is or are different from that or those of a facsimile receiver is disclosed. The facsimile scanning conversion system makes use of a facsimile scanner, a buffer memory, an electrical transmission control device, an addition register and a scanning control device. The electrical transmission control device causes the buffer memory to read out one scanning line picture signal therefrom or to write in the one scanning line picture signal thereto with a given period which coincides with a scanning period of corresponding receiver or transmitter for effecting a continuous scanning and adds a ratio of indexes of cooperation between the transmitter and the receiver to the addition register with the above mentioned period. The scanning control device causes the facsimile scanner to effect one line scanning and also causes the buffer memory to write in one scanning picture signal thereto and to read out the one scanning picture signal therefrom when a value of an integer portion of the addition register is not zero and at the same time causes the addition register to subtract 1 from the value of the integer portion thereof.
Inventors
👤 Kenji Fukuoka
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-23 18:05
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40068
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
292 words
A facsimile scanning conversion system which can convert a facsimile scanning at a transmitter side or a receiver side such that a picture surface received at the receiver is correctly similar to that to be transmitted from the transmitter when either one or both an index of cooperation and a scanning speed of a facsimile transmitter is or are different from that or those of a facsimile receiver, which makes use of a buffer memory having a capacity for memorizing at least one scanning line picture signal and an electrical transmission control device, which can read out one scanning line picture signal from said buffer memory or write in said one scanning line picture signal to said buffer memory with a given period which coincides with a scanning period of corresponding receiver or transmitter for effecting a continuous scanning operation with the aid of said electrical transmission control device, which makes use of an addition register, a scanning control device and a facsimile scanner, which can add a ratio between indexes of cooperation of said transmitter and said receiver to said addition register with said period, can effect when the value of an integer portion of said addition register is not 1 one line scanning operation of said facsimile scanner and can write in one scanning line picture signal to said buffer memory or read out one scanning line picture signal from said buffer memory and subtract 1 from the value of the integer portion of said addition register to repeatedly effect said scanning of said facsimile scanner and said writing in or reading out operation of said buffer memory until the value of the integer portion of said addition register reaches to zero with the aid of said scanning control device.
Claim 2
Dependent Claim
292 words
A facsimile scanning conversion system which can convert a facsimile scanning at a transmitter side or a receiver side such that a picture surface received at the receiver is correctly similar to that to be transmitted from the transmitter when either one or both an index of cooperation and a scanning speed of a facsimile transmitter is or are different from that or those of a facsimile receiver, which makes use of a buffer memory having a capacity for memorizing at least one scanning line picture signal and an electrical transmission control device, which can read out one scanning line picture signal from said buffer memory or write in said one scanning line picture signal to said buffer memory with a given period which coincides with a scanning period of corresponding receiver or transmitter for effecting a continuous scanning operation with the aid of said electrical transmission control device, which makes use of an addition register, a scanning control device and a facsimile scanner, which can add a ratio between indexes of cooperation of said transmitter and said receiver to said addition register with said period, can effect when the value of an integer portion of said addition register is not 1 one line scanning operation of said facsimile scanner and can write in one scanning line picture signal to said buffer memory or read out one scanning line picture signal from said buffer memory and subtract 1 from the value of the integer portion of said addition register to repeatedly effect said scanning of said facsimile scanner and said writing in or reading out operation of said buffer memory until the value of the integer portion of said addition register reaches to zero with the aid of said scanning control device.
Claim 3
Dependent Claim
187 words
A facsimile scanning conversion system as claimed in claim 1, in which said electrical transmission control device can read out one scanning line picture signal from said buffer memory or write in said one scanning line picture signal to said buffer memory by means of an electrical transmission control instruction pulse delivered from said electrical transmission control device and having a given frequency which corresponds to a scanning period of corresponding receiver or transmitter for effecting a continuous scanning operation, and said scanning control device can pick up in a dispersion manner a scanning control instruction pulse from a pulse having a frequency which coincides with or integer times higher than said given frequency of said electrical transmission control instruction pulse with a rate given by a ratio of the index of cooperation of said transmitter to the index of cooperation of said receiver, each said scanning control instruction pulses thus picked up effecting each scanning operation of said facsimile scanner and writing in said one scanning line picture signal to said buffer memory or reading out said one scanning line picture signal from said buffer memory.