JPH10243233A - Communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the communication equipment by which an output, in response to a characteristic of a printer at a receiver side, is obtained. SOLUTION: A control circuit 20 of a receiver informs a luminance-density conversion table, in matching with a characteristic of a recording circuit 16 to a transmitter. Then the transmitter sends image data obtained by reading an original, coding the read signal and modulating the coded signal through luminance-density conversion, based on the luminance-density conversion table in matching with the characteristic of the recording circuit 16 informed from the receiver. On the other hand, in the case of selecting a direct transmission mode, the transmitter sends image data obtained by reading an original, coding the read signal and modulating the coded signal through the luminance-density conversion based on the luminance-density conversion table, in matching with the characteristic of the recording circuit 16 informed from the receiver through one call connection. In the case of selecting a memory transmission mode, the transmitter opens once a line and reads an original, codes the read signal and stores the coded signal to a memory, and makes a call to the receiver and executes the memory transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication apparatus such as a facsimile apparatus having a luminance-density conversion table.

[0002]

2. Description of the Related Art In a conventional facsimile apparatus, shading correction, ABC control, and the like are performed on analog information read from a contact sensor, and this information is AD-converted. Then, the digital information is subjected to an edge enhancement process, a scaling process, and then a brightness-density conversion based on a brightness-density conversion table.

[0003] This brightness-density conversion is performed such that the level of the density actually observed by the printer is matched when recording is performed on the printer side, assuming that the reading is performed with the correct brightness from the reading device. That is, it is for correcting the characteristics of the recording means.

Thereafter, error diffusion is performed on the halftone information, and simple binarization is performed on the character information with a fixed threshold, and the reading is completed. This information is recorded at the time of copying, and encoded, modulated and transmitted at the time of facsimile transmission.

[0005]

However, in the above-described conventional example, since reading is performed using a luminance-density conversion table suitable for the printer characteristics of the own apparatus at the time of copying, there is no inversion of the luminance level, and Fine gradation expression can be achieved.

However, at the time of facsimile transmission,
Since reading is not performed using a luminance-density conversion table that is appropriate for the printer characteristics of the receiver, the density of the received and recorded images is inverted, and the gradation cannot be clearly expressed. there were.

Further, in the LBP printing, in particular, since the characteristics of the entire recording means change greatly when the cartridge changes, there is a drawback that good image quality cannot be maintained with a uniform brightness-density conversion table.

It is an object of the present invention to provide a communication device capable of obtaining an output according to the characteristics of a printer on a receiving side.

[0009]

Means for Solving the Problems The first invention of the present application is:
The receiver is provided with a means for notifying the transmitter of a brightness-density conversion table suitable for the characteristics of the recording means. Further, a second invention of the present application is characterized in that the transmitter performs brightness-density conversion based on the brightness-density conversion table notified from the receiver, and performs data transmission processing. Further, the third invention of the present application is characterized in that the transmission processing includes reading, encoding, modulation, and transmission of a transmission original.

According to a fourth aspect of the present invention, when direct transmission is selected, the transmitter performs a luminance-density conversion based on a luminance-density conversion table notified from the receiver during one call connection. And transmitting the data.

According to a fifth aspect of the present invention, when memory transmission is selected, the transmitter stores a luminance-density conversion table notified from the receiver in one call connection, and opens the line once. After that, the brightness-density conversion is performed based on the brightness-density conversion table notified from the receiver, and the transmission data is stored in the memory by the preprocessing required for the memory transmission, and the call is transmitted to the designated destination. , Memory transmission is performed.

According to a sixth aspect of the present invention, the preprocessing required for the memory transmission includes reading of a transmission original, encoding, modulation, and sequential storage in a memory, and all read information is stored in a memory. After that, memory transmission is performed. Further, a seventh invention of the present application is characterized in that there is provided a means for storing a brightness-density conversion table suitable for the characteristics of the recording means on the partner receiver side corresponding to the call destination. Further, the eighth invention of the present application is characterized in that a luminance-density conversion table suitable for the characteristics of the recording means on the partner receiver side is stored in a destination where memory transmission or timer memory transmission is frequently used. I do.

According to a ninth aspect of the present invention, a memory transmission to a destination storing a luminance-density conversion table suitable for the characteristics of the recording means on the partner receiver side or a timer memory transmission is performed. Based on the luminance-density conversion table stored corresponding to the destination, the transmission original is read, encoded, and sequentially stored in the memory, and after all the read information is stored in the memory, the transmission to the memory is performed. Or,
A communication device for executing timer memory transmission.

The tenth invention of the present application further comprises means for detecting the exchange of the recording medium, and upon detecting the exchange of the recording medium, stores a luminance-density conversion table suitable for the characteristics of the recording means of the own apparatus. It is characterized by performing again.

According to an eleventh aspect of the present invention, when the exchange of the recording medium is detected and the luminance-density conversion table suitable for the characteristics of the recording means of the own apparatus is stored again, the fact is notified to the transmitter. It is characterized by doing. Further, according to a twelfth invention of the present application, when the transmitter receives a notification that the luminance-density conversion table is stored again in the receiver, the transmitter stores the luminance-density conversion table for the next memory transmission. It is characterized by the following. Further, the thirteenth invention of the present application discloses that the fact that the luminance-density conversion table which is in accordance with the characteristics of the own device notified from the receiver to the transmitter is stored again after the exchange of the recording medium for each destination. It is characterized in that it is performed only once.

According to a fourteenth aspect of the present invention, the replacement of the recording medium is performed by replacing a cartridge.

According to a fifteenth aspect of the present invention, after the recording medium is exchanged, an ideal density of 64 levels is recorded, and the recorded information is read, so that the luminance of the recording means of the own apparatus is reduced. It is characterized in that the density conversion table is stored again.

According to a sixteenth aspect of the present invention, the receiver notifies the transmitter of a brightness-density conversion table suitable for the characteristics of the recording means, and the transmitter transmits the brightness-density conversion table notified by the receiver. It is characterized in that a luminance-density conversion is performed based on the data and a data transmission process is performed. Further, according to a seventeenth aspect of the present application, when direct transmission is selected, the transmitter transmits the luminance-notified from the receiver in one call connection.
It is characterized in that a luminance-density conversion is performed based on a density conversion table, and the data transmission processing is performed. further,
According to an eighteenth aspect of the present application, when memory transmission is selected, the transmitter stores a luminance-density conversion table notified from the receiver in one call connection, and after opening the line once, A luminance-density conversion is performed based on the luminance-density conversion table notified from the receiver, a call is made to a designated destination in a state where transmission data is stored in the memory by preprocessing necessary for memory transmission, and the memory is transmitted. Is performed.

According to the first to third and sixteenth aspects of the present invention, the luminance is determined based on the printer characteristics of the other receiver.
The density conversion can be performed, and the gradation can be clearly expressed without the density inversion of the recorded information on the receiver side. In particular, a great effect can be exhibited in recent communication in which high-speed, high-quality communication has become a reality.

According to the fourth and seventeenth aspects,
In the direct transmission, the first invention can be effectively applied to a process of executing communication by one call connection. Further, according to the fifth and eighteenth aspects, in the memory transmission, the first aspect can be effectively applied by a process of performing communication with two call connections as compared with the direct transmission.

According to the sixth to ninth aspects, when the memory transmission to the frequent destination or the timer memory transmission is selected, the data can be immediately read, encoded and stored in the memory. No call connection is required, and communication costs can be reduced.

According to the tenth and fourteenth aspects, for example, when the cartridge is replaced and the brightness-density conversion table of the recording means is changed, it is possible to output a good image in an appropriate manner. Will be possible.

According to the eleventh to fourteenth aspects of the present invention, the transmitter has a luminance lower than that of the recording means of the receiver.
When a density conversion table is stored and memory transmission is performed using this table, the receiver can accurately respond to the next memory transmission even if the cartridge changes, for example. It is possible to output a simple image.

Further, according to the fifteenth aspect, for example, a luminance-density conversion table suitable for the characteristics of the recording means after replacement of the cartridge can be effectively stored again.

[0025]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to one embodiment of the present invention.

An NCU (network control unit) 2 connects to a terminal of the line in order to use the telephone network for data communication and the like.
It controls connection of a telephone exchange network, switches to a data communication path, and holds a loop. The NCU 2 connects the telephone line 2a to the telephone 4 when the signal level (signal line 20a) from the control circuit 20 is “0”, and connects the telephone line 2a when the signal level is “1”. It is connected to the facsimile machine side.
In a normal state, the telephone line 2a is connected to the telephone 4 side.

The hybrid circuit 6 separates the transmission system signal and the reception system signal, sends the transmission signal from the adding circuit 12 to the telephone line 2a via the NCU 2, and transmits the signal from the other party via the NCU 2. The signal is received and sent to the modem 8 via the signal line 6a.

The modulator / demodulator 8 is based on ITU-T Recommendation V. 8,
V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
34, and performs modulation and demodulation based on
Each transmission mode is designated by the signal line 20c. The modulator / demodulator 8 receives a signal output on a signal line 20b, outputs modulated data on a signal line 8a, receives a received signal output on a signal line 6a, and outputs demodulated data on a signal line 8b. Output.

The ANSam transmitting circuit 10 is a circuit for transmitting an ANSam signal. When a signal of signal level "1" is output to the signal line 20d, the ANSam transmitting circuit 10 transmits an ANSam signal to the signal line 10a and outputs the ANSam signal to the signal line 20d. When the signal of the signal level “0” is being output, no signal is output to the signal line 10a.

The reading circuit 14 reads an image of a document and outputs the read image data to a signal line 14a. The reading circuit 14 performs shading correction, ABC control, and the like on analog information read from the contact sensor, and performs AD (analog-digital) conversion of the information. Then, for this digital information,
Edge emphasis processing, scaling processing, followed by luminance-density conversion based on the luminance-density conversion table output to the signal line 20f, error diffusion for halftone information, simple binary with fixed threshold for character information And outputs the binarized read information to the signal line 14a.

The addition circuit 12 inputs the information of the signal line 8a and the information of the signal line 10a, and adds the result of the addition to the signal line 12a.
a. The recording circuit 16 includes a signal line 20.
The information output to e is recorded sequentially line by line.

The memory circuit 18 is used to store raw information of read data or encoded information, and also stores received information or decoded information.

The calling circuit 22 inputs the telephone number output on the signal line 20g and outputs a selection signal on the signal line 2b when a calling command pulse is generated on the signal line 20h.

The storage circuit 24 is a circuit for storing a luminance-density conversion table based on the printer characteristics of the own device via a signal line 24a.

The storage circuit 26 is a circuit for storing, via the signal line 26a, a brightness-density conversion table based on the printer characteristics of the other receiver notified from the other receiver.

The storage circuit 28 is a circuit for storing, via a signal line 28a, a luminance-density conversion table based on the printer characteristics of the other receiver notified from the other receiver corresponding to the call destination.

The storage circuits 24, 28 are battery-backed memory spaces in which data is not erased even during a power failure.

The control circuit 20 performs processing for notifying the transmitter of a brightness-density conversion table suitable for the characteristics of the recording circuit 16 from the receiver to the transmitter, particularly in the first embodiment of the present invention. Also, processing of reading, encoding, modulating a document, and transmitting image data by luminance-density conversion based on a luminance-density conversion table matching characteristics of the recording circuit 16 notified from the receiver on the transmitter side. I do.

When the direct transmission is selected here, the transmitter transmits the luminance based on the luminance-density conversion table corresponding to the characteristics of the recording circuit 16 notified from the receiver during one call connection. Reading, encoding, modulating and transmitting the original by density conversion;

On the other hand, when the memory transmission is selected, the transmitter stores a brightness-density conversion table which is in accordance with the characteristics of the recording circuit 16 which is notified from the receiver to the transmitter in one call connection. After the line is released, the original is read, encoded, and sequentially stored in the memory by the luminance-density conversion based on the luminance-density conversion table corresponding to the characteristics of the recording circuit 16 notified from the receiver. After storing the read information in the memory, a call is made to the designated destination and the memory is transmitted.

When the copy operation is selected, the brightness-density conversion based on the characteristics of the recording circuit 16 of the own device is performed, and when the reception is selected, the characteristics of the recording circuit 16 of the own device are transmitted to the partner transmitter. Is notified to the transmitter.

FIGS. 2 to 6 are flowcharts showing the control flow of the control circuit 20 in the first embodiment of the present invention.

First, it is assumed that a luminance-density conversion table based on the characteristics of the printer (recording circuit 16) of its own device is stored in the storage circuit 24 at the time of shipment from the factory.

Next, in FIG. 2, the operation starts at S0, and at S2, a signal of signal level "0" is output to the signal line 20a to turn off the CML. In S4, the signal line 20d
To output a signal of the signal level "0" and not transmit the ANSam signal.

In S6, S8, S10, and S12, it is determined in order whether reception copy, direct transmission, and memory transmission are selected. If reception is selected, the process proceeds to S70, and if copy is selected, the process proceeds to S68. If the direct transmission is selected, the process proceeds to S16, and if the memory transmission is selected, the process proceeds to S3.
The process proceeds to S2, and if nothing is selected, the process proceeds to S14, performs other processing, and proceeds to S2.

At S16, a call is made to the designated destination using the calling circuit 22, and at S18, a signal of signal level "1" is output to the signal line 20a to turn on the CML.

In S20, a pre-procedure is performed, and in S22,
It is determined whether the receiver has notified the brightness-density conversion table suitable for the characteristics of the printer by the pre-procedure. If notified, the process proceeds to S24. If not, the process proceeds to S28.

In S24, the brightness-density conversion table is stored in the storage circuit 26 via the signal line 26a based on the characteristics of the printer of the other receiver notified from the receiver.

Then, in S26, the image signal is read / transmitted. Here, the brightness-density conversion table notified in S24 and registered in the storage circuit 26 is stored in the signal line 20f.
And performs luminance-density conversion based on this table. Thereafter, a post-procedure is performed in S30, and the process proceeds to S2.

In S28, the image signal is read / transmitted. Here, a luminance-density conversion table registered in the storage circuit 24 is output to the signal line 20f based on the printer characteristics of the own device, and the luminance-density conversion is performed based on this table. Thereafter, a post-procedure is performed in S30, and the process proceeds to S2.

In step S32, a call is made to the designated destination using the calling circuit 22. In S34, the signal line 20
The signal of the signal level “1” is output to “a” to turn on the CML. In S36, a pre-procedure is performed. In S38, it is determined whether or not there is a notification of a brightness-density conversion table suitable for the characteristics of the printer from the partner receiver in the pre-procedure. If not, the process proceeds to S50.

In S40, a luminance-density conversion table based on the printer characteristics of the other receiver notified from the receiver is stored in the storage circuit 26. In S42, a signal of signal level "0" is output to the signal line 20a. To turn off the CML.

In S44, the information to be transmitted to the memory is read, encoded, and stored in the memory. here,
The luminance-density conversion table stored in the storage circuit 26 is output to the signal line 20f, and the luminance-density conversion is performed based on this table.

In S46, it is determined whether or not reading of one page has been completed. If the reading has not been completed, the process proceeds to S44, and if completed, the process proceeds to S48. In S48, it is determined whether or not reading of all pages has been completed. If not, the process proceeds to S44, and if completed, the process proceeds to S58.

At S50, a signal of signal level "0" is output to the signal line 20a to turn off the CML. S52
Then, the information to be transmitted to the memory is read, encoded, and stored in the memory. Here, brightness-density conversion is performed based on the printer characteristics of the own device registered in the storage circuit 24.

In S54, it is determined whether or not reading of one page has been completed. If the reading has not been completed, the process proceeds to S52, and if completed, the process proceeds to S56. In S56, it is determined whether or not reading of all pages has been completed. If not completed, the process proceeds to S52, and if completed, the process proceeds to S58.

In S58, a call is made to the designated destination using the calling circuit 22. In S60, a signal of signal level "1" is output to the signal line 20a to turn on CML. S
A pre-procedure is performed in 62, a memory transmission is performed in S64, and a post-procedure is performed in S66, and the process proceeds to S2.

In S68, a luminance-density conversion table based on the printer characteristics of the own device registered in the storage circuit 24 is output to the signal line 20f, and the luminance-density conversion based on this table is read and recorded. Make a copy. Thereafter, the process proceeds to S2.

In S70, a signal of signal level "1" is output to the signal line 20a to turn on the CML. In S72, a pre-procedure is performed. Here, the function of notifying the brightness-density conversion table suitable for the printer characteristics and the table are notified to the partner transmitter. Next, in S74, image signals are received / recorded, and in S76, post-procedures are performed, and the process proceeds to S2.

As described above, the luminance-density conversion is performed by the luminance-density conversion table according to the printer characteristics of the receiving side, and the image is read, encoded, and transmitted.

Next, a second embodiment of the present invention will be described.

In the second embodiment, the control circuit 20
Performs the following control. First, for destinations that use memory transmission or timer memory transmission frequently,
A luminance-density conversion table suitable for the characteristics of the printer (recording circuit 16) on the partner receiver side is stored in the storage circuit.

When a memory transmission or a timer memory transmission is performed to a destination where a luminance-density conversion table suitable for the characteristics of the recording circuit 16 on the partner receiver side is stored, the table is stored corresponding to this destination. Based on the brightness-density conversion table, the original is read, encoded, and sequentially stored in a memory. After all the information is stored in the memory, a call is made to a designated destination to execute memory transmission. ,
Alternatively, a call is made to a designated destination at a designated time to execute timer memory transmission.

FIGS. 7 and 8 are flowcharts showing the operation of the control circuit 20 according to the second embodiment of the present invention, which is different from the first embodiment (FIGS. 2 to 6).

In FIG. 7, S80 represents YES in S12. Then, in S82, it is determined whether or not a brightness-density conversion table based on the printer characteristic of the designated destination is registered in the storage circuit 28. If not, the process proceeds to S84, and if it is registered, the process proceeds to S86. Proceed to.

In S86, the information transmitted from the memory is read, encoded, and stored in the memory. The luminance-density conversion table registered in the storage circuit 28 corresponding to the destination specified here is output to the signal line 20f, and the luminance-density conversion is performed based on this table.

In S88, it is determined whether or not reading of one page is completed. If reading of one page is not completed, the process proceeds to S86, and if reading of one page is completed, S is performed.
Go to 90. In S90, it is determined whether or not reading of all pages has been completed.
The process proceeds to 92 (S58), and if all pages have not been read, the process proceeds to S86.

S94 represents YES in S38. In S96, it is determined whether or not memory transmission to the same destination is performed three times a day.
Go to 00, and if NO, proceed to S98 (S40).

In S100, a brightness-density conversion table based on the printer characteristics of the other receiver notified from the receiver is stored in correspondence with the designated destination of the storage circuit 28. S1
In 02, the signal of the signal level "0" is output to the signal line 20a to turn off the CML. Thereafter, the process proceeds to S86.

Next, as a third embodiment of the present invention, the above-mentioned notification of the luminance-density conversion table is transmitted to 64 gradations and 256 gradations.
It is also possible to use two gradations and notify the transmitter of a luminance-density conversion table of the number of read gradations.

When the reading circuit 14 is a device for reading out 64 gradations on the transmitter side, when the 256 gradation gradation-density conversion table is notified, the 64 gradation gradation-density conversion table is thinned out. When the reading circuit 14 is a device that reads 256 gradations,
When the luminance-density conversion table of 64 gradations is notified, it is estimated and used as a luminance-density conversion table of 256 gradations.

Next, a fourth embodiment of the present invention will be described.

In the control circuit 20 of the fourth embodiment, in the control of the second embodiment described above, the exchange of the recording medium, specifically, the exchange of the cartridge is detected, so that the recording circuit 16 of its own apparatus is detected. The brightness-density conversion table suitable for the characteristic is stored again, and when the reception is selected, the transmitter is notified only after one exchange after replacing the cartridge for each destination. On the other hand, the transmitter stores the brightness-density conversion table for the next memory transmission.

Here, after replacement of the cartridge, recording is performed at an ideal density of 64 steps, and by reading this recorded information, the luminance-specific characteristic of the recording circuit 16 of the own apparatus is obtained.
It is assumed that the density conversion table is stored again.

FIGS. 9 to 12 show the operation of the control circuit 20 in the fourth embodiment of the present invention, in which the control circuit 20 of the second embodiment (FIGS. 2 to 6 are obtained by modifying and adding FIGS. 7 and 8). 4 is a flowchart showing a different part from FIG.

In FIG. 9, S110 represents S0. Then, in S112, the cartridge replacement flag is set to 0 to indicate that the cartridge has been replaced and a new cartridge has been set (1 indicates this). Thereafter, the process proceeds to S2 in S114.

S116 represents S14.
Then, in S118, it is determined whether or not the cartridge presence flag is 0. If it is 0, the process proceeds to S126, and if it is 1, the process proceeds to S120.

In step S120, the cartridge remaining amount detecting means determines whether the cartridge has no remaining amount.
If the cartridge has no remaining amount, the process proceeds to S122, the cartridge presence flag is set to 0, and the process proceeds to S123 (S2). If the cartridge remains, the process proceeds to S124, the cartridge presence flag is set to 1, and the process proceeds to S125.
Proceed to (S2).

In S126, it is determined whether or not the cartridge has no remaining amount.
Proceeding to 128 (S2), if there is a cartridge remaining,
Since the cartridge has been replaced, the process proceeds to S130.

At S130, since the cartridge has been replaced, a print test is performed, and a message indicating that this information is desired to be read is displayed. In S132, it is determined whether or not a print test has been selected, and if so, the process proceeds to S134.

In S134, the image data of 64 gradations is automatically printed out. Then, in S136, it is determined whether or not the reading of the test print information is selected, and if it is selected, the process proceeds to S138.

In S 138, the data of 64 tones of the theoretical value and the data of 64 tones after printing are compared to obtain a luminance-density conversion table based on the printer characteristics of the own device, and stored in the storage circuit 24.

Next, in S140, the fact that all cartridge replacements have not been notified is stored corresponding to the transmission destination.
Then, in S141, the cartridge presence flag is set to 1, and in S142, the process proceeds to S2.

Further, S144 represents S62. Then, in S146, it is determined whether or not a notification that the cartridge has been exchanged from the partner receiver has been received.
Upon receiving notification that the cartridge has been replaced, S148 is performed.
If there is no notification that the cartridge has been replaced, the process proceeds to S150 (S64).

In S148, the storage circuit 26 stores the brightness-density conversion table based on the printer characteristics of the other receiver notified from the receiver, and prepares for the next memory transmission. Then, in S150, the process proceeds to S64.

Step S152 corresponds to step S70. Then, in S154, it is determined whether or not the cartridge of its own device has been exchanged, and in the reception from the destination, whether or not the fact has not been notified. If YES, the process proceeds to S156. Is notified, and the process proceeds to S72 in S158. If NO in S154, the process directly proceeds to S158 (S72).

In the above embodiment, a stand-alone type facsimile apparatus has been described as an example. However, the present invention is not limited to this. For example, a copy function, an electronic file function, and a data processing function are combined with a communication function. Of course, it can be applied to the data communication control in the integrated data processing system.

[0088]

As described above, according to the first to third and sixteenth aspects of the present invention, it is possible to perform the luminance-density conversion based on the printer characteristics of the other receiver.
There is no density inversion of the recorded information on the receiver side, and it is possible to express gradations clearly. In particular, a great effect can be exhibited in recent communication in which high-speed, high-quality communication has become a reality.

Further, according to the fourth and seventeenth aspects of the present application, the first aspect of the present invention can be effectively applied to a process of executing communication by one call connection in direct transmission. Also, according to the fifth and eighteenth aspects of the present application, the memory transmission is 2 times less than the direct transmission.
The first invention can be effectively applied by the process of executing communication in a single call connection.

According to the sixth to ninth aspects of the present invention, when the memory transmission to the frequent destination or the timer memory transmission is selected, the data can be immediately read, encoded, and stored in the memory. This eliminates the need for two call connections, thereby reducing communication costs.

According to the tenth and fourteenth aspects of the present invention, for example, when the cartridge is replaced and the brightness-density conversion table of the recording means is changed, a good image is output in an appropriate manner. It becomes possible to do.

According to the eleventh to fourteenth aspects of the present invention, the transmitter stores a luminance-density conversion table suitable for the characteristics of the recording means of the partner receiver. In the case where the memory transmission is performed, even if the cartridge is changed on the receiver side, for example, the next memory transmission can be properly dealt with, and the receiver side can output a good image.

According to the fifteenth aspect of the present invention, for example, a luminance-density conversion table suitable for the characteristics of the recording means after the replacement of the cartridge can be effectively stored again.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing an operation in the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation in the first embodiment.

FIG. 4 is a flowchart showing an operation in the first embodiment.

FIG. 5 is a flowchart showing an operation in the first embodiment.

FIG. 6 is a flowchart showing an operation in the first embodiment.

FIG. 7 is a flowchart showing an operation in the second embodiment of the present invention.

FIG. 8 is a flowchart showing an operation in the second embodiment.

FIG. 9 is a flowchart showing an operation in a fourth embodiment of the present invention.

FIG. 10 is a flowchart showing an operation in the fourth embodiment.

FIG. 11 is a flowchart showing an operation in the fourth embodiment.

FIG. 12 is a flowchart showing an operation in the fourth embodiment.

[Explanation of symbols]

 2 ... NCU, 4 ... telephone, 6 ... hybrid circuit, 8 ... modulator / demodulator, 10 ... ANSam sending circuit, 12 ... addition circuit, 14 ... reading circuit, 16 ... recording circuit, 18 ... memory circuit, 20 ... control circuit, 22 ... a calling circuit, 24, 26, 28 ... a storage circuit.

Claims (18)

[Claims] 1. A communication apparatus, comprising: means for notifying a brightness-density conversion table suitable for characteristics of a recording means from a receiver to a transmitter. 2. The communication device according to claim 1, wherein the transmitter performs luminance-density conversion based on the luminance-density conversion table notified from the receiver, and performs data transmission processing. 3. The communication device according to claim 1, wherein the transmission processing includes reading, encoding, modulating, and transmitting a transmission original. 4. The apparatus according to claim 2, wherein when direct transmission is selected, the transmitter performs luminance-density conversion based on the luminance-density conversion table notified from the receiver in one call connection. And performing the data transmission process. 5. The transmitter according to claim 2, wherein when memory transmission is selected, the transmitter stores a luminance-density conversion table notified from the receiver in one call connection, After releasing the line once, the luminance-density conversion is performed based on the luminance-density conversion table notified from the receiver, and the transmission data is stored in the memory by the pre-processing necessary for the memory transmission. A communication device for calling a destination and performing memory transmission. 6. The pre-processing required for memory transmission according to claim 2, wherein the pre-processing required for memory transmission includes reading of a transmission original, encoding, modulation, and sequential storage in a memory,
A communication device for transmitting a memory after storing all read information in a memory. 7. A communication apparatus comprising means for storing a luminance-density conversion table suitable for the characteristics of the recording means on the partner receiver side corresponding to the call destination. 8. The brightness-density conversion table according to the characteristics of the recording means on the partner receiver side is stored at a destination where memory transmission or timer memory transmission is frequently used. Communication device. 9. The method according to claim 8, wherein when performing memory transmission or timer memory transmission to a destination storing a luminance-density conversion table suitable for the characteristics of the recording means on the partner receiver side, Based on the luminance-density conversion table stored in correspondence with the destination, the transmission original is read, encoded, and sequentially stored in the memory, and after all the read information is stored in the memory, the memory transmission, or A communication device for executing timer memory transmission. 10. The apparatus according to claim 1, further comprising means for detecting replacement of the recording medium, and detecting the replacement of the recording medium, and detecting the luminance which is suitable for the characteristics of the recording means of the apparatus. A communication device for storing a density conversion table again. 11. The transmitter according to claim 10, wherein when the exchange of the recording medium is detected and the luminance-density conversion table suitable for the characteristics of the recording means of the own apparatus is stored again, the fact is notified to the transmitter. A communication device characterized by the above-mentioned. 12. The transmitter according to claim 11, wherein, when receiving a notification that the luminance-density conversion table is stored again in the receiver, the transmitter stores the luminance-density conversion table for the next memory transmission. A communication device characterized by the above-mentioned. 13. The luminance according to claim 11, wherein the luminance which is notified from the receiver to the transmitter is suitable for the characteristics of the own apparatus.
The communication device is characterized in that the fact that the density conversion table is stored again is performed only once after the exchange of the recording medium for each destination. 14. The communication device according to claim 10, wherein the exchange of the recording medium is performed by exchanging a cartridge. 15. The recording apparatus according to claim 10, wherein after the recording medium is exchanged, an ideal density of 64 levels is recorded, and the recorded information is read to obtain the characteristics of the recording means of the apparatus. A communication device for storing again a luminance-density conversion table suitable for the communication device. 16. A receiver notifies the transmitter of a luminance-density conversion table suitable for the characteristics of the recording means.
A communication method, comprising: performing luminance-density conversion based on a luminance-density conversion table notified from a receiver, and performing data transmission processing. 17. The method according to claim 16, wherein when direct transmission is selected, the transmitter performs a luminance-density conversion based on a luminance-density conversion table notified from the receiver in one call connection. And a communication method for transmitting the data. 18. The memory according to claim 16, wherein when memory transmission is selected, the transmitter stores a luminance-density conversion table notified from the receiver in one call connection, and releases the line once. After that, the brightness-density conversion is performed based on the brightness-density conversion table notified from the receiver, and the transmission data is stored in the memory by the preprocessing required for the memory transmission, and the call is transmitted to the designated destination. , A memory transmission is performed.