JPH0398385A - Facsimile reply equipment - Google Patents

Abstract

PURPOSE:To prevent mis-output of a data to other line by providing a bit replacement circuit for bit replacement with respect to a data sent/received to/from a buffer memory to a position of a terminal control section accessing the buffer memory. CONSTITUTION:The equipment is provided with a counter host interface section 1 sending/receiving a data between buffer memories 2-4 in the equipment and a host equipment and facsimile terminal control sections 5-7 sending/receiving a data between the buffer memories 2-4 and a facsimile equipment. Moreover, a bit replacement circuit is provided, which receives a picture signal data and a data line number at the position accessing the buffer memories 2-4 in the equipment and replaces the bit location in the picture signal data according to the predetermined algorithm in response to the inputted line number. Thus, even when a data is read from buffers of other line, no correct data is obtained, an output of a pattern recognized normally to the facsimile equipment is not outputted and mis-output of data to other line is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile response device that receives a facsimile image signal as input, performs procedures with a facsimile terminal, and multiplexes image output over a plurality of lines.

[Conventional technology]

Conventional facsimile answering devices receive character code information or facsimile image signals from a host device, convert the code information into character patterns, and then encode the facsimile, and in the case of image signals, convert the character code information or facsimile image signals into character patterns. Perform conversion, etc. Thereafter, the communication procedure is carried out with the facsimile terminal connected to the line, and the above-mentioned image signal is output. The above operations are performed by multiplexing multiple lines.

[Problem to be solved by the invention]

The facsimile response device described above is configured with firmware, and a microcomputer controls each part within the device according to a built-in program. It is connected to the host device via a bus such as GPIB, and sends and receives control data, image signal data, etc. through this bus. For example, data in blocks of a certain size (for example, 8 Kbytes) is received from a host device via a bus. This data is temporarily stored in a buffer memory allocated to each line on the internal memory of the device. Thereafter, the facsimile terminal control section performs procedures with the facsimile terminal, and then reads out the data in the buffer and outputs it to the facsimile terminal.

The above-mentioned buffer is allocated on the communication system memory by dividing addresses into lines. Therefore, if you accidentally store data in the buffer of another line when receiving data from a host device, or read data that is not in the buffer of another line when outputting to a facsimile terminal, the facsimile screen of the contents of the other line may be If the data is output as is, it will cause a serious problem in terms of service.

[Means to solve the problem]

The facsimile response device of the present invention includes a plurality of buffer memories for storing image signal data, a host interface unit for transmitting and receiving data between the buffer memories and a host device, and a data exchange unit for transmitting and receiving data between the buffer memory and a facsimile terminal. A facsimile terminal control unit that performs transmission and reception, and a part of the terminal control unit that accesses the buffer memory include a bit replacement circuit for performing bit replacement for data sent to and received from the buffer memory.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

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

This embodiment receives a facsimile image signal as an input, and includes a facsimile terminal control circuit and a control circuit that controls the facsimile terminal control circuit.
In a device that performs the operation of converting the encoding method of a facsimile image signal as necessary and outputting it to a facsimile terminal by multiplexing multiple lines, this function is used to send and receive data between buffer memories 2 to 4 in the device and a host device. Facsimile (FAX) terminal control units 5 to 7, which exchange data between the upper interface unit 1 and buffer memories 2 to 4 and the facsimile terminal, and portions that access the buffer memories 2 to 4 in the device, transmit image signal data and The circuit is configured to include a bit switching circuit that receives the line number of the data as input and switches bit positions in the image signal data according to a predetermined algorithm according to the input line number.

Next, the operation will be explained with reference to FIGS. 1 and 2. The facsimile response device receives image signal data from a host device through the host interface section 1. At this time, the upper-level interface unit 1 replaces the bits in the hidden data corresponding to the "1" part of the line number for each byte of received data, and then transfers the bits from the buffers 2 to 2 corresponding to the line. Store in 4. When outputting the data in the corresponding buffer to the facsimile terminal, the facsimile terminal controllers 5 to 7 first perform a communication procedure with the facsimile terminal, and then, for each byte of data read from the buffer, perform the same process as when storing the buffer. After performing the same bit permutation processing, the data is sent to the facsimile terminal.

〔Effect of the invention〕

As explained above, the present invention performs bit swapping within a byte of data when storing data received from the higher order into a line-compatible buffer, and performs the same intra-byte bit swapping process when reading data from the buffer. By doing this, even if data is read from the buffer of another line by mistake, the correct data will not be obtained, and a screen that can be recognized normally will be output to the facsimile terminal. This has the effect of preventing erroneous output.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing the data buffer storage/reading process of this embodiment. DESCRIPTION OF SYMBOLS 1... Upper device interface unit, 2-4... Line compatible buffer memory, 5-7... Line compatible facsimile control unit.

Claims (1)

[Claims] A plurality of buffer memories for storing image signal data, a host interface section for transmitting and receiving data between the buffer memory and a host device, and a facsimile terminal control section for transmitting and receiving data between the buffer memory and a facsimile terminal. A facsimile response device characterized in that a part of the terminal control unit that accesses the buffer memory includes a bit switching circuit for switching bits of data sent to and received from the buffer memory.