JPH0754962B2 - Fax machine - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a facsimile apparatus that converts received MH, MR, etc. code data into print data and performs a printing operation.

(Prior Art) Conventionally, when this type of device outputs image data,
The CPU decodes the encoded image data from the transmission system or the reading system regardless of the form of the code, and passes it to the recording system in the form of parallel data or serial data. Therefore, for example, if the recording system has only the function of converting parallel data into serial data, the CPU converts any code such as MR, MH code, or run length code from the input unit into the form of parallel data. However, there are drawbacks that the CPU itself is required to have high-performance and high-speed processing, and the decoding time becomes long.

(Purpose) The present invention has been made in view of the above points, and the received M
For the purpose of efficiently executing the conversion process of code data such as H, MR to print data without concentrating the burden on a specific part in the device. In a facsimile apparatus comprising a facsimile unit for performing a recording operation based on image data, the facsimile unit includes a receiving unit for receiving code data and a facsimile control unit for controlling a facsimile operation, and the recording unit. Includes a recording unit that performs a recording operation based on image data and a recording control unit that controls the recording operation. In the facsimile unit, the code data received by the receiving unit is decoded by the facsimile control unit into an intermediate code. And converting the intermediate code into image data by the recording control means in the recording unit, And to provide a facsimile apparatus for recording operation based on image data by the step.

(Embodiment) FIG. 2 shows an embodiment of the present invention, 1 is a read input unit for reading an image and transferring it as data to a CPU, 2 is a transmission input unit for sending received data to the CPU, and 3 is an image such as MR.MH. CP that decodes data and controls the operation of facsimile
U and 4 transfer the data from the CPU to the thermal head 5,
In the recording unit for printing by driving a head, 1a to 4a show the flow of image data.

In the above configuration, since the parallel code is sent from the reading unit 1 to the CPU 3 via 1a at the time of copying, data processing time becomes unnecessary if 3a is also a parallel code. During transmission, various codes such as MR or MH code at G3 and parallel code at G2 can be used.
Sent to CPU3. If the recording unit only has the function to convert parallel code to serial here, CP will be received when G3 is received.
U must decode the MR.MH code, make it run-length, make it parallel code, and send it to the recording unit from 3a. In this case, the recording section of the CPU during the decoding process cannot print, resulting in a loss of time. Therefore, in the present invention, the CPU3
The information in the form of the intermediate code is added to 3a which sends the image data to the recording unit 4, and the recording unit 4 determines the intermediate code form according to the information and performs the decoding operation, and the serial data is transferred to the thermal head. I made it possible to perform feed printing. For example, in the case of a recording unit that can receive both run length code and parallel code, the CPU can decode the MR.MH code into run length at the time of reception, and at the same time, the recording unit can convert the run length into serial data and perform printing.
For G2 reception, the parallel code remains unchanged, so CP
The U can select the form of the intermediate code to be transferred to the recording unit according to the amount of work.

FIG. 3 shows a format of image data including the information of this code form. Assuming 16-bit image data, the run-length code can represent a run length of 2048 dots by setting 12-bit actual image data.
Other information can be used for the remaining 4 bits.

It is indicated that one bit out of these four bits is a run length code. In the parallel code, 8 bits out of 16 bits are used as 1-byte parallel image data, and 1 bit in the other 8 bits indicates parallel data.

The recording system can discriminate the code form from this 1-bit information. If it is a run length, it makes it parallel and then converts it to serial data. If it is a parallel code, it makes it serial data as it is. It is converted and transferred to the thermal head for printing. This example is particularly effective when a 16-bit parallel processing CPU is used.

FIG. 1 shows a configuration example of the recording unit 4 in the present invention. 4b
Is a recording control unit, and 16-bit image data from CPU3
It is written in the image data memory (FIFO) in the RAM area of 4d from the DMA circuit of 4c. The recording control unit 4b judges the code form in the image data information, and if it is parallel data, it is left unchanged, and if it is run length code, it is converted into parallel code and transferred to the parallel / serial conversion circuit 4e. When the serial data for one line is latched in the thermal head of 5, the drive circuit of 4f is driven to print one line.

FIG. 4 shows a flow chart of 1-line printing operation control of this operation. This is based on the system control program by the microcomputer of the control unit 4b. In S10, it is first determined whether or not the memory 4d is empty, and if not, in S20 it is determined whether the code format of the upper 3rd bit in the data format shown in FIG. 3 is 0 or 1, and if it is run length code data, S30 Convert to parallel data with, otherwise do not convert, then S40
To transfer parallel data to P / S converter 4e. In S50, the completion of the data transfer of one line is determined from the count of the number of data of one line or the line end signal EOL. When the completion of one line is determined, the process proceeds to the drive command of S60.

The present invention can be applied not only to facsimiles, but also to printing and printing devices such as other printers, or display devices such as LCDs and CRTs.

As explained above, the CPU can select the intermediate code format to be sent to the recording section, and the recording section has the function of converting various codes to serial codes
It became possible to configure the system with, and it became possible to reduce the system cost. In addition, sharing the decoding process is also effective in reducing the processing time.

(Effect) As described above, according to the present invention, in the facsimile apparatus including the facsimile unit that receives code data such as MH and MR, and the recording unit that performs the recording operation based on the image data,
In the facsimile unit, the code data received by the receiving unit is decoded by the facsimile control unit for controlling the facsimile operation of the facsimile unit and converted into an intermediate code, and the recording unit controls the recording operation of the recording unit. The recording control unit converts the image data into image data, and the recording unit performs the recording operation based on the image data. As a result, the conversion processing of the code data into the image data is shared by the facsimile control means for controlling the facsimile operation of the facsimile section and the recording control means for controlling the recording operation of the recording section. , It is possible to prevent the processing load from being concentrated on a specific part in the facsimile machine, and thus to reduce the speed,
It becomes possible to efficiently execute the conversion process of the code data into the print data by combining the low function components.

[Brief description of drawings]

 2 is a block diagram showing the present invention, FIG. 3 is an example of an image data format, FIG. 1 is a circuit diagram of an image processing apparatus according to the present invention, and FIG. 4 is an operation flow chart of a recording control unit. In the figure, 4b is a recording control unit, 4c is a DMA circuit, 4d is a FIFO, 4e is a P / S converter, and 4f is a driver.

Claims (1)

[Claims] 1. A facsimile apparatus comprising a facsimile section for receiving coded data such as MH and MR and a recording section for recording operation based on image data, wherein the facsimile section comprises a receiving means for receiving the coded data and a facsimile operation. A facsimile control unit for controlling the recording unit, and the recording unit includes a recording unit for performing a recording operation based on image data and a recording control unit for controlling the recording operation, and the facsimile unit receives the signal by the receiving unit. Code data is decoded by the facsimile control means and converted into an intermediate code, the recording section converts the intermediate code into image data by the recording section, and the recording section performs a recording operation based on the image data. A facsimile machine characterized by.