JP2910085B2 - Facsimile machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly, to a facsimile apparatus that displays a facsimile reception image on a television receiver.

[Conventional technology]

2. Description of the Related Art A conventional facsimile apparatus stores image information received from a line, and prints out the stored information on recording paper by a printer.

[Problems to be solved by the invention]

In the above-described conventional facsimile, the received data is recorded and printed on paper. Therefore, as the facsimile spreads, information not required by the user is sent from a third party, and the received recording paper is wasted. That's the problem.

In order to solve such a problem, it is considered that it is preferable to temporarily store received data in a memory, display the received data on a television screen, and then record and print only when necessary.

However, since the resolution (number of pixels) of the television is much lower than that of the facsimile, even if the received data of the facsimile is displayed on the television as it is, it is almost impossible to decipher it with a simple picture, even if it is a simple picture. Although there are some special applications that display received data on a high-resolution display device such as a personal computer, they have a drawback that they cannot be displayed on a home television receiver.

[Means for solving the problem]

A facsimile apparatus according to the present invention includes a memory circuit that stores encoded facsimile signals received from a line for a plurality of pages, a frame memory circuit that stores facsimile signals read and decoded from the memory circuit for one screen, and a horizontal circuit. The read start address can be arbitrarily changed in both the vertical and vertical directions by an operation input, and the horizontal and vertical leads of the frame memory circuit adapt the distance from the read start address to the read end address both horizontally and vertically to the resolution of the television screen. It has an address counter and a conversion circuit for converting a black and white binary facsimile signal read from the frame memory circuit into a video signal for television.

〔Example〕

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

FIG. 1 is a block diagram of a facsimile apparatus of the present invention.

In the present embodiment, a home television receiver 10 is connected to the facsimile machine 1. The facsimile signal received from the line passes through a network control circuit (NCU) 2, is demodulated into a baseband signal by a modem 3, and is stored in a memory 4. The memory 4 has a capacity capable of storing a sufficient number of received documents for normal use. The stored received document is taken out of the memory 4 by a user's operation input, and the facsimile signal encoded in the MH or MR is decoded by the decoder 5 and then stored in the frame memory 6. 1 in the frame memory 6
Documents for each page are stored. The data stored in the frame memory 6 is repeatedly read at a television frame cycle, and is continuously displayed on the screen of the television receiver 10 via the signal converter 9.

The range of data read from the frame memory 6 is determined as follows, and will be described with reference to FIG. A facsimile reception screen (here, one page of A4 size) stored in the frame memory 6 and a vertical address read counter 7 (V-RAC: Vertical Rea)
d Address Counter), a horizontal address read counter 8 (H-RAC: Horizontal Read Address Counter), respective read start addresses, read end addresses, and these addresses are actually read out and displayed on a television screen. It is a figure showing the relation with a range.

Since the aspect ratio of the screen of the television is 3: 4, the image is displayed on the television with 225 pixels vertically × 300 pixels horizontally. NT
In the SC television, since the number of horizontal scans in an effective screen is usually about 450, interlaced scan is not performed. Alternatively, interlaced scanning may be performed,
In this case, the same horizontal scanning line on the frame memory is displayed again during interlaced scanning.

The number of pixels per facsimile A4 size page is fine mode (main scanning line density 8 lines / mm x sub-scanning line density 7.7 lines / m
m), which is 2286 by 1680. When this is displayed at the television resolution described above, one page of the facsimile is divided into 60 screens. In this case, it is considered that the number of divisions is too large and operability is difficult. Therefore, the number of pixels stored in the frame memory is 4 lines / mm in main scanning line density.
X The vertical scanning line density is 3.85 lines / mm, and the length is 1143 x 840. In this case, the number of divisions is only 15 and a practical resolution can be maintained.

The distance from the start address to the end address is determined to be 225 in the vertical direction and 300 in the horizontal direction. Then, the portions of the vertical address read counter 7 and the horizontal address read counter 8 that are enclosed between the respective read start addresses and the read end addresses become ranges that are temporarily displayed on the television screen.

The read start address is specified based on information input from a joystick-like switch of an operation panel (not shown). For example, when the joystick is pushed upward, the read start address of the vertical read address counter moves in the address 0 direction by one address while being pushed. If it is pressed to the lower right, the read start address of the vertical read address counter is
While the button is being pressed, it moves one address at a time in the direction opposite to address 0, and at the same time, the reading start address of the horizontal read address counter moves one address at a time in the direction of address 0 while it is being pressed. The end address automatically moves while maintaining a constant distance from the start address. Along with these movements, the area displayed on the television screen moves smoothly and continuously as if peeping through peeping glasses. It is to be noted that, although not displayed once on the television, recording and printing directly on the recording paper can be freely performed by an instruction from the operation panel (not shown).

〔The invention's effect〕

As described above, the present invention stores a facsimile reception image once and displays it on a television screen at a practical resolution at the time of reading, so that only the necessary received document can be recorded and printed on the recording paper. This has the effect of saving money.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a diagram for explaining the operation of this embodiment. 1 ... facsimile machine, 2 ... network control circuit (NCU),
3 ... modem, 4 ... memory, 5 ... decoder, 6 ...
Frame memory 7, Vertical read address counter (V-RAC) 8, Horizontal read address counter (H
-RAC), 9 ... signal converter, 10 ... television receiver.

Claims (1)

(57) [Claims] 1. A memory circuit for accumulating a plurality of pages of encoded facsimile signals received from a line, a frame memory circuit for accumulating one screen of facsimile signals read and decoded from the memory circuit, and a horizontal and vertical memory. In both directions, the read start address can be arbitrarily changed by an operation input, and the horizontal and vertical read addresses of the frame memory circuit adapt the distance from the read start address to the read end address both horizontally and vertically to the resolution of the television screen. A facsimile apparatus comprising: a counter; and a conversion circuit that converts a monochrome binary facsimile signal read from the frame memory circuit into a television video signal.