JPS61225965A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To transmit a video signal as well as an original by using a binary- coding means to binary-code an inputted video signal in the unit of horizontal scanning lines and using the speed converting means so as to convert the signal into a speed in response to the transmitted speed. CONSTITUTION:A facsimile equipment is provided with a video signal input terminal 2, a signal converting circuit 3 converting a video signal AS from a VTR 1 led via the video signal input terminal 2 into a facsimile picture signal, a coding circuit 4 applying coding an compression to a facsimile picture signal, and a transmission section 5 comprising a modulation circuit 51 and a network control circuit 52 and sending the facsimile picture signal to a line 6. After the video signal inputted via the video signal input terminal is subject to binary- coding in the unit of horizontal scanning lines by a binary-coding means 32, the result is converted into a speed in response to the transmission speed by a speed converting means 33 and converted into the facsimile picture signal, the signal is fed to the transmission section, from which the signal is sent. Thus, the video signal as well as the original is transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a facsimile device that expands the scope of application of transmission information.

[Technical background of the invention and its problems]

Due to advances in video technology, general-purpose video cameras, video tape recorders, video disc playback devices, etc.
Various video devices have been developed and are beginning to become popular among general users, and it would be very convenient if the video signals of these video devices could be easily transmitted.

Therefore, conventional facsimile machines have been considered to transmit video signals from video equipment.

This method is highly practical because it can use facsimile machines that have been widely used in offices and the like in recent years.

However, facsimile machines generally have a reading scanning section using a photoelectric converter as information input means, and are configured to read and scan a document using the reading scanning section, encode the read image signal, and transmit it. Video signals cannot be transmitted in their original form. Conventionally, it has been considered to display the video signal on a display device or the like, take a photograph of the display screen, and have the photograph read by the scanning unit of the facsimile machine and then transmitted.
This method was not suitable for practical use because it required a lot of effort and time for transmission.

[Purpose of the invention]

The present invention has focused on the above-mentioned problem, and an object of the present invention is to provide a facsimile device that can transmit not only original documents but also video signals, thereby increasing the types of transmitted information that can be handled and capable of transmitting even more diverse information. do.

[Summary of the invention]

In order to achieve the above object, the present invention includes a video signal input terminal, video signal binarization means, speed conversion means, and video signal selection means for selecting and specifying the video signal to be transmitted,
The video signal input through the video signal input terminal is converted into a facsimile image signal by converting it into a facsimile image signal by converting it into a facsimile image signal by converting it to a speed corresponding to the transmission speed by using the speed converting means after converting the video signal input through the video signal input terminal into a binary value in units of horizontal scanning lines using the binarizing means. , this signal is supplied to the transmitting section for transmission.

[Embodiments of the invention]

FIG. 1 shows the structure of a portion of a facsimile machine according to an embodiment of the present invention. Note that 1 is a video tape recorder (VTR) connected to this facsimile machine.

This facsimile device includes a video signal input terminal 2, a signal conversion circuit 3 that converts a video signal As from a VTR 1 introduced through the video signal input terminal 2 into a facsimile image signal, and a code that encodes and compresses the facsimile image signal. circuit 4, modulation circuit (MOD) 51 and network control circuit (NC).
52 and a transmitting section 5 for transmitting a facsimile image signal to the line 6. Note that 7 is a telephone connected to the line 6 in parallel with the facsimile machine.

The signal conversion circuit 3 includes a video signal amplifier 31, a binarization circuit 32 that binarizes the video signal As amplified by the video signal amplifier 31 according to a predetermined threshold value for each horizontal scanning line, and Binarized video signal @B output from the conversion circuit 32
Buffer circuit 3 that converts S to a speed corresponding to the transmission speed
3, a synchronization separation circuit 34 that separates a horizontal synchronization signal and a vertical synchronization signal from the video signal output of the video signal amplifier 31, and a horizontal synchronization signal H8 and a vertical synchronization signal @VS obtained by this synchronization separation circuit. and a control signal generation circuit 35 that generates various signals for speed conversion.

FIG. 2 shows the configuration of the buffer circuit 33 and control signal generation circuit 35. The buffer circuit 33 is
It has a plurality of line memories 61 to 6n, and by sequentially switching and selecting these line memories 61 to 6n with a switching circuit (SW) 71.72, the binary video signal BS is sequentially transferred to the line memory for each horizontal scanning line. 61 and 62 and read from it. Further, the buffer circuit 33 has a gate circuit 73, and the gate circuit 73 performs gate control on the binary video signal BS.

- The force control signal generation circuit 35 is the write clock generation circuit 8
1, a readout clock generation circuit 82, a switching signal generation circuit 83, and a selection signal generation circuit 84.

The write clock generation circuit 81 receives the horizontal synchronization signal H8 and the vertical synchronization signal VS output from the synchronization separation circuit 34.
A write clock WP of a predetermined frequency is generated in synchronization with the buffer circuit 3.
The binary video signal 88 is written to each of the three line memories 61 to 6n. Here, the above write clock WP
The frequency of is the effective number of horizontal scanning lines in the vertical scanning direction of the screen (
512 lines/frame), since the ratio of the horizontal and vertical lengths of the screen is 4:3 and the horizontal scanning frequency is 15.75 KHz, It is necessary to set it to approximately 10M)h. On the other hand, the read clock generation circuit 82 generates a read clock RP that is slower than the write clock WP according to the transmission speed of the transmitter 5 in synchronization with the horizontal synchronization signal H8 and the vertical synchronization signal @VS from the synchronization separation circuit 34. The read clock RP is used to read out the binary video signal BS written in each line memory 61 to 6n of the buffer circuit 33. Further, the switching signal generation circuit 83 generates a switching signal KS in synchronization with the horizontal synchronization signal @H8 from the synchronization separation circuit 34.
.

A line memory and readout circuit which generates LS and supplies 8°18 to these switching signals to each switching circuit 71 and 72 of the buffer circuit 33, thereby writing to each horizontal scanning line of the video signal As. Switch and select the line memories to be used. Further, the selection signal generation circuit 84 generates a gate signal GS in synchronization with the vertical synchronization signal VS from the synchronization separation circuit 34 when the operation signal SS of the screen selection switch provided on the operation panel arrives. The signal @GS causes the gate circuit 73 of the buffer circuit 33 to be in an open state, so that only the binarized video signal BS for one selected screen is stored in the line memory 6.
1 to 6n.

Next, the operation of the apparatus configured as described above will be explained with reference to FIG. First, the operator connects the VTR 1 to the video signal input terminal 2 of the facsimile machine, and in this state
Play the TR1 videotape. Then, the video signal As is introduced into the signal conversion circuit 3 through the video signal input terminal 2, amplified by the video signal amplifier 31, and then guided to the binarization circuit 32, where it is shown, for example, at BS in FIG. It is binarized like this. In addition, the synchronization separation circuit 24
As shown in FIG. 3, a horizontal synchronizing signal H8 and a vertical synchronizing signal S are separated and extracted from the video signal As.

Now, in this state, the operator performs a dial operation on the operation panel of the facsimile machine, confirms that the connection is completed, and then, while looking at the monitor device (not shown), selects the operation panel from the desired screen of the videotape being played on the VTR 1. When the screen selection switch is operated, the selection signal generation circuit 84 generates a gate signal GS as shown in FIG. 3 in synchronization with the vertical synchronization signal of the video signal As. As a result, the gate circuit 73 is in the gate open state for one screen. Therefore, during this period, the output from the VTR 1 is output to the binarization circuit 32.
The binarized video signal @BS binarized by the above gate circuit 7
3 to a switching circuit 71, and sequentially written into line memories 61 to 6n selected by this switching circuit 71 for each horizontal scanning line. At this time, since the frequency of the write-on clock WP is set according to the number of horizontal scanning lines of the video signal As, the video signal As is stored with high resolution. On the other hand, each time a horizontal scanning line of this binary video signal BS is stored, the switching circuit 72 switches in the order of writing by the switching signal LS to sequentially select the line memories 61 to 6n from which to read the data. Each of the binary video signals stored in the line memories 61 to 6n is read out at a low speed corresponding to the transmission speed of the transmitter in synchronization with RP. Thus, a video signal that is no different from a facsimile image signal is output. Then, this read binary video signal C8 is supplied to the encoding U path 4 via the switching circuit 72, and after being encoded and compressed by this circuit 4, it is modulated by the modulation circuit 51 of the transmitter 5. and is sent to I6.

As described above, in this embodiment, since the signal conversion circuit 3 for converting the video signal to the facsimile image signal is provided,
The desired screen of the video played on the VTR 1 can be converted into a facsimile image signal and transmitted.As a result, the operator can once capture the video on a photograph and have the reading/scanning unit read the photograph as in the past. There is no need to perform the task of transmitting the video signal, and thus the video signal can be transmitted easily and quickly. Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, the video signal is selected and transmitted on a screen-by-screen basis, but only a desired area within one screen may be selected and transmitted. Further, in the embodiment described above, the video signal is faithfully pixelized and transmitted as it is, but it may be reduced or compressed and then transmitted. Furthermore, as for the type of video equipment, other than VTR, a video disk playback device, a video camera, a so-called disk camera that stores video in an image memory, etc. may be applied, and other types of binarization means and speed conversion means may be used. However, various modifications can be made without departing from the spirit of the present invention.

〔Effect of the invention〕

As detailed above, according to the present invention, a video signal input terminal, video signal binarization means, speed conversion means, and video signal selection means for selecting and specifying a video signal to be transmitted are provided,
The video signal input through the video signal input terminal is converted into a facsimile image signal by converting it into a facsimile image signal by converting it into a facsimile image signal by converting it to a speed corresponding to the transmission speed by using the speed converting means after converting the video signal input through the video signal input terminal into a binary value in units of horizontal scanning lines using the binarizing means. By supplying this signal to the transmitting section for transmission, it is possible to transmit not only original documents but also video signals, thereby increasing the types of transmission information that can be handled and performing even more diverse information transmission. A facsimile machine can be provided.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing the configuration of a facsimile machine according to an embodiment of the present invention, FIG. 2 is a circuit block diagram showing the configuration of the main parts of the same device, and FIG. 3 is a signal waveform diagram used to explain the operation. It is. DESCRIPTION OF SYMBOLS 1... Video tape recorder, 2... Video signal input terminal, 3... Signal conversion circuit, 31... Video signal amplification circuit, 32... Binarization circuit, 33... Buffer circuit, 34... Synchronization separation circuit, 35... Control signal generation circuit, 4... Encoding circuit, 5... Transmission unit, 51...
Modulation circuit (Moo), 52...Network control port m (NCU
>, 6-DO line, 7... Telephone, 61-6n... Line memory, 71° 72... Switching circuit (SW), 73
...gate circuit, 81...-inclusive clock generation circuit,
82--Reading clock generation circuit, 83...Switching signal generation circuit, 84...Selection signal generation circuit, As...Video signal, BS...Binarized video signal, C8...Speed conversion Binarized video signal, H8...horizontal synchronization signal, V
S... Vertical synchronization signal, WP... ■Inclusive lock, RP
...Reading clock, KS, LS...Switching signal, GS
...Gate signal, SS...Screen selection switch operation signal.

Claims (4)

[Claims] (1) a video signal input terminal, a binarization means for binarizing the video signal introduced through the video signal input terminal by making its horizontal scanning line correspond to the main scanning line of the facsimile image signal; a speed converting means for converting the binary video signal obtained by the digitizing means into a speed corresponding to the transmission speed and providing it to the transmitter; and a video signal for selecting a signal to be transmitted from among the video signals according to an external instruction. A facsimile device comprising a selection means. (2) The speed conversion means converts the binary video signal to a speed suitable for transmission by varying the pixel density in the horizontal scanning direction or the linear density in the vertical scanning direction of the video signal. The facsimile machine described in (1). (3) The facsimile apparatus according to claim (1), wherein the video signal selection means selects the video signal on a screen-by-screen basis. (4) The facsimile apparatus according to claim (1), wherein the video signal selection means selects a desired area within one screen.