JPH03224349A - Facsimile broadcast receiver - Google Patents

Abstract

PURPOSE:To receive facsimile broadcast without disturbance of a wired system facsimile communication by storing once a code series of a received facsimile broadcast and reading the code at once and decoding and printing out the code at a high speed when no communication is implemented for the wired system. CONSTITUTION:A code memory 18 and a read write circuit 19 controlling the write and read of the code memory are added and a control procedure of a control circuit 9A is formed so as to read the code series of a facsimile broadcast stored in the code memory 18 sequentially from the code memory 18 and to print it out when no facsimile communication of the wired system is implemented. A switch 17 is thrown normally to the lower position so as to apply an output signal of a MODEM 14 to a decoding circuit 7. The facsimile broadcast signal received in this state is stored entirely in the memory 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a facsimile broadcast receiving apparatus that receives facsimile signals multiplexed with television broadcasts.

(b) Conventional technology Since the 1960s, a method of facsimile broadcasting has been studied in which fixed images such as text, figures, and photographs are transmitted using television broadcast radio waves and then reproduced and recorded on the receiving side (Journal of the Society of Television Engineers, 87). In February 1999, the Telecommunications Technology Council Report Consultation No. 15 requested that two systems, analog and digital, be reported to the Minister of Posts and Telecommunications.

Among these, the digital method is transmitted at a transmission rate of 16 kbps with each frame having the structure shown in FIG. 2 as one unit. In Figure 2, the portion (D A T ) excluding control signals such as MC (mode control signal) and PFX (prefix), CHC (error correction code), and FC (frame synchronization code) is processed by run-length encoding. It is a compressed facsimile image signal or a program selection signal such as a program number. FIG. 3 shows an example of the configuration of a digital facsimile broadcast receiver. In Fig. 3, the TV tuner (2) selects the desired channel of the TV radio waves received from the TV antenna (1), and the demodulation circuit (3) extracts and demodulates the facsimile signal multiplexed with the audio signal. converted into a signal sequence.

The frame timing of this digital signal sequence is detected by the frame synchronization circuit (4), and the digital signal sequence is descrambled and descrambled.
In the interleaving circuit (5), the
After being scrambled and deinterleaved and subjected to error correction processing in the error correction circuit (6), the decoding circuit (6)
The image signal compressed in step 7) is expanded and recorded by a printer (8). The CPU (9) identifies the control signal shown in FIG. 2 and controls the operation of the facsimile broadcast receiving device,
Identify the program number, etc., and selectively receive only the necessary programs.

In addition, digital facsimile broadcasting compresses image signals using exactly the same method as telephone facsimile, so the decoding circuit (7) and printer (8) in Figure 3 are the same as existing wired facsimile. It can be composed of circuits and mechanisms. For this reason, a "shared type" receiver that can receive facsimile broadcasts and communicate as a wired 63 facsimile using a single facsimile device is considered (Telecommunications Technology Council Report Consultation No. 15 Appendix-3) etc.) An example of the configuration of this shared receiver is shown in Section 4.
As shown in the figure. In FIG. 4, facsimile broadcast signals are received from an antenna (1) and converted into a digital signal series by a tuner (2) and a demodulation circuit (3), as in FIG. 3. (10) corresponds to the part surrounded by the dotted line in FIG. 3, and is a signal processing circuit for error correction and the like. Also (1
2) is a terminal for connecting a telephone line; (9) is a control circuit consisting of a microcomputer that controls the overall operation of the facsimile machine; and (11) is an operating section such as keys and a display. To receive a facsimile broadcast signal, turn the switch (17) to the upper side, input the code sequence of the facsimile broadcast output from the signal processing circuit (10) to the decoding circuit (7), and receive the compressed image signal. The file is expanded and printed using a printer (8). When receiving telephone signals, the switch (17) is turned down to decode the facsimile code series received through the line control circuit (13) and modem (14) in the same way as a normal facsimile machine. It is expanded and printed in circuit (7). In addition, when sending facsimile codes to the telephone line, the image reading section (16
) is compressed by an encoding circuit (15) and sent through a modem (14) and a line control circuit (13).

(c) Problems to be Solved by the Invention However, with the above-mentioned receiving device, although it is possible to switch between facsimile broadcast reception and wired facsimile communication, it is not possible to receive them at the same time. For example, even if a facsimile broadcast program is received during wired facsimile communication, the wired communication cannot be interrupted, so the facsimile broadcast reception signal is discarded.

(D) Means for Solving the Problem The present invention includes a receiving circuit that receives facsimile broadcasting and obtains a facsimile code sequence, a communication control circuit that performs wired facsimile communication and obtains a facsimile code sequence, and a circuit that decodes the facsimile code sequence. It has a recording means for printing,
In a facsimile broadcast receiving device having a function of appropriately switching between facsimile broadcast reception and wired facsimile communication and printing and recording received images of both, in the facsimile broadcast receiving device, the facsimile broadcast receiving circuit receives the facsimile broadcast. The storage means stores a facsimile code sequence and can read it at a predetermined timing. This feature is characterized in that the data is read out sequentially from the beginning and printed.

(e) Effect: According to the above means, the code sequence of the received facsimile broadcast is temporarily stored, and when wired communication is not being performed, the code sequence is read out every time, decoded and printed at high speed. Without interfering with wired facsimile communication,
Facsimile broadcasts can also be received.

(f) Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the present invention is applied to a shared receiver.

Components in FIG. 1 that are the same as those in FIG. 4 are given the same numbers and their explanations will be omitted. What is different from Fig. 4 is the code memory (1
8) and a read/write circuit (19) for controlling writing and reading of this code memory, and a code string of facsimile broadcasting stored in the code memory (18) is transmitted by wired facsimile communication. sometimes,
The point is that the control procedure for the control circuit (9A) is created so that the code memory (18) is sequentially read out and printed, and will be specifically explained below.

In FIG. 1, the switch (17) is normally connected to the lower side so that the output signal of the modem (14) is supplied to the decoding circuit (7). That is, the facsimile broadcast receiving apparatus is brought into a state where it can be used as a normal 03 facsimile apparatus. All facsimile broadcast signals received in this state are stored in the code memory (18).

If facsimile codes for one page or more are stored in the code memory (18), the control unit (9A) switches the switch (1) when no wired facsimile communication is being performed.
7) to the upper side, read/write control circuit (19)
is read out from the code memory (18), inputted to the decoding circuit (7), and printed. When printing is completed, switch (17) is turned down to return to the state where wired communication is possible.

When printing a received facsimile broadcast signal, a conventional printing device decodes the received signal in real time and takes several tens of seconds to several minutes to print one page.

Therefore, the device having the configuration shown in FIG. 4 cannot receive wired signals during this period, and even if there is an incoming call, it has no choice but to ignore it. In this embodiment, since the facsimile broadcast code sequence is already stored in the code memory (18), the data is read out from the code memory (18) at the highest speed that can be processed by the decoding circuit (7) and printer (8). can be decrypted and printed. In the case of a facsimile machine with a large number of
It can be decoded from OOμsec in several msec at most. Therefore, it is considered that the speed at which data is read from the code memory (18) and printed is determined by the capability of the printer (8). Normally, the recording speed of G3 facsimile is 10 to 20 msec per line. Recording speed is 10
In the case of an m5ec/line printer, the time required to print one A4 size page is approximately 22 seconds. Furthermore, when the recording speed is 5 m5ec/1ine, it takes only 11 seconds. Also, the recording speed is 5 msec/line
printer can be easily realized.

If printing one page is completed in about 11 seconds, even if a wired call is received during printing, Phase A and Phase B of the prescribed facsimile communication procedures (CCITT Recommendation T, 30) are being executed. You can finish printing in between. Furthermore, if a high-speed printer is used, the time required for printing will be further reduced. Therefore, in this embodiment, it is possible to almost eliminate interference with wired communication due to printing of received signals of facsimile broadcasting.

Further, since the code memory (18) stores the code sequence of the received facsimile broadcast, it is necessary to ensure sufficient capacity. Normal facsimile communication takes about five minutes at most. Therefore, if we consider storing the facsimile broadcast signals received during this period, it will require 500 kB.
It is considered that a capacity of about yte-IMByte is sufficient.

Next, a second embodiment of the present invention consisting of a facsimile adapter device and a facsimile machine will be described with reference to FIG.

Incidentally, in FIG. 5, the same components as those in FIG. 3 are given the same numbers and their explanations are omitted. In FIG. 5, the broken line separating the terminal (24) and the switch (29) indicates the facsimile adapter device part of the facsimile broadcast receiving device on the left side of the broken line, and the facsimile device (27) including the recording means and the facsimile communication control circuit. ) is configured separately.

(10) shows the signal processing circuit surrounded by the dotted line in Figure 3, and (20) shows the speed of the received facsimile code at 96
Speed conversion circuit for adapting to 00 bps, (21)
(22) is a switch that switches between the output signal of the speed conversion circuit (20) and the control signal output from the CPU (9) that complies with CCITT Recommendation T and Recommendation Port and inputs it to the modem; (22) is a switch that inputs the output signal of the CCITT Recommendation ■The modem (23) that complies with G3 standard starts the facsimile machine (27) of G3 standard, and the line control circuit that sends the facsimile code (
24) is a terminal for connecting the G3 facsimile machine (27), and (25) and (26) are a key input device and a display device, respectively. (28) is a telephone line connection terminal (29)
) is G3 facsimile machine I! (27) This is a switch circuit that switches the input signal. (30) is a code memory that stores the facsimile code of the received facsimile broadcast; (31) is a read/write circuit that manages the address of code memo J (25) and controls read/write; (32)
is a switch that changes the input signal of the speed conversion circuit.

Next, the operation of the second embodiment will be explained. Usually a switch (
29) on the bottom, and the G3 facsimile machine (27)
) can transmit and receive telephone line signals through the terminal (28). Here, as an operation example (■), if a facsimile broadcast program is received while the G3 facsimile machine (27) is not communicating through the telephone line,
P U (9) switches the switch (29) to the upper side and the switch (21) to the lower side, controls the modem (22) and line control circuit (23), and connects the G3 facsimile machine (2).
7) Start. After this, switch the switch (21) to the upper side and use the speed conversion circuit (12) to achieve an effective transmission speed of 9760.
．． 8b'ps facsimile broadcast image signal at 9600
The speed is converted to bps and sent to the G3 facsimile machine. At this time, the switch (22) is kept in the upper position and the code memory (32) is not used.

Next, when the G3 facsimile (27) is communicating through the telephone line, the DC loop of the telephone line is closed by the G3 facsimile machine (27), so the CPU
can detect from the DC current detection circuit (30) that the 63 facsimile device (27) is communicating with the telephone line. As an operation example ■, if a facsimile broadcast program is received in this state, the G3 facsimile machine (2
Since the communication in step 7) cannot be interrupted, the received facsimile broadcast signals are sequentially recorded in the code memory (32). After that, it is detected that the communication of the G3 facsimile machine has ended, and after starting the G3 facsimile machine (27) in the same manner as in the operation example ① above, the switch (32) is turned down and the code is stored in the code memory. Read out the facsimile code and connect the speed conversion circuit (2) in the same manner as in operation example ■.
0), the modem (22), and the line control circuit (23) to the 63 facsimile (27). The address management circuit (31) controls the writing and reading addresses of the facsimile code in the code memory (32), so that the received facsimile broadcast signal is properly transmitted to the 63 facsimile (27 facsimile).
).

Next, as an operation example (2), if a call is received from a telephone line while a facsimile broadcast is being received and printed, the incoming call may be completely ignored, but in this embodiment, the following control is performed. The facsimile broadcast data that is being printed continues to be printed until the page is finished, and when the printing of one page of data is finished, communication with the G3 facsimile machine (27) is terminated and the line is disconnected. switch (29) to the lower side to connect the telephone line to the 63 facsimile machine (27
) to accept incoming calls from the telephone line. The received signal of the facsimile broadcast during this period is recorded in the code memory (32) in the same manner as in the operation example (2), and is sent to the 03 facsimile device (27) after communication with the telephone line is completed.

In the manner described above, reception of facsimile broadcasting and normal facsimile communication via a telephone line can be realized with one 03 facsimile device.

The code memory (32) must have sufficient storage capacity to store the received signal of the facsimile broadcast while receiving the signal from the telephone line. Normal facsimile communication can be completed within 2 to 3 minutes to 5 minutes at most. In facsimile broadcasting, approximately 73 kByte of data is sent per minute.

Therefore, the capacity of the code memory (32) is 500k.
Byte-IMByte would also be sufficient.

Furthermore, a facsimile broadcast receiving apparatus according to a third embodiment of the present invention will be explained with reference to FIGS. 6 to 8. This embodiment is also different from other embodiments in that the code sequence of facsimile broadcasting is stored in the storage means, and when wired facsimile communication is not being performed, it is sequentially read from the storage means and printed. It is similar to

FIG. 6 shows a configuration diagram of a receiving device consisting of a G3 standard facsimile device (41) and an expansion cartridge (42) that has a built-in facsimile broadcast receiving circuit and has a facsimile broadcast receiving function. An expansion cartridge (42) is configured to be freely removable from an expansion slot (39) provided on the back side of the camera.

FIG. 7(a) is a diagram showing the circuit configuration of the G3 facsimile machine (41), and FIG. 7(b) is a diagram showing the circuit configuration of the facsimile broadcast receiving cartridge (42).

In FIGS. 7(a) and 7(b), (43) is a CPU which controls the entire apparatus. (44) is a data buffer,
This is a buffer memory used for data communication with the expansion cartridge. (45) is a code memory, which is used for temporarily storing facsimile codes. (4
7) is an image memory, which is used for temporarily storing image data. (46) is a communication device that performs line control etc. for G3 standard facsimile communication, (48) is a reading device for reading originals, and (49) is a printer device for printing received originals. (50) is an encoding/decoding circuit for compressing and decompressing communication documents, (51) is an I10 drive circuit 1 for data communication with an expansion cartridge, and (52) is a main unit of this device, which is composed of a key, LCD, etc. This is an operation unit for performing operations.

In FIG. 7(b), (53) is a tuner that selects a channel of TV radio waves, (54) is a demodulation circuit that extracts the facsimile signal multiplexed with TV radio waves and converts it into a digital signal series, and (55) is the above-mentioned demodulation circuit. A signal processing circuit (58) is a code memory 2 for storing facsimile codes, and a signal processing circuit (58) performs error correction on the digital signal sequence and transmits the signal to a receiving memory (56) which is a buffer memory. (
59) is a ROM in which a program for the CPU (3) to control the expansion cartridge library (42) is stored.
, (60) is a general-purpose RAM used as needed in each process.
It is.

(61) is an I10 drive circuit 2 for performing data communication between the expansion cartridge (42) and the facsimile machine (41). (C1) is a connector used for connection to a telephone line, and (C2) and (C4) are connectors used for mounting an expansion cartridge, which are detachably connected to each other. (C3) is a connector used for connection with a TV antenna.

FIG. 8 is an explanatory diagram of the cartridge attachment detection section (62). (63) is a spring used to switch the contacts in the mechanism of the switch (SWI), and the switch (SWI) is configured to be switched by the protrusion (T) of the cartridge (42).

Next, the operation of the apparatus configured as described above will be explained. First, automatic detection of the attachment of the expansion cartridge (2) is performed as follows. That is, as shown in FIG. 8(a), when the expansion cartridge (42) is not attached, the contacts (A) and (C) are closed by the force of the spring (61).
However, when the expansion cartridge (2) is installed, the contact (C) is pressed by the protrusion (T) on the side of the cartridge 2 and comes into contact with the contact (B). Figure 8 (a
) FIG. 8(b) shows the electrical configuration within the broken line. (64) is an I10 port for checking whether or not an expansion cartridge is connected; the contact (A) is applied with a voltage of +5V, and the contact (B) is grounded. In the part within the broken line in Fig. 8(a), the contact point (C) is (A), (B)
It operates as a switch (SWI) that touches either contact. The voltage at the contact (C) is transmitted to the tangent (D).

The CPU (3) can confirm the attachment state of the expansion cartridge (42) by monitoring the voltage of (D).

A cartridge attachment detection circuit (not shown) is provided in the 10 drive circuit 1 (41), and the CPU (43) monitors the attachment status of the expansion cartridge (42) by the I10 drive circuit 1 (41).

If the cartridge (42) is not installed, the above C
The P U (43) determines that there is no extended function and controls the device to perform normal 63 facsimile operation. If it is installed, the CPU (43) determines that it has an expansion function and controls the expansion cartridge (42) according to the program written in the ROM (49). First, the device is put into a facsimile broadcast reception standby state by specifying a reception channel using the operation unit (42). The TV radio waves of the channel designated by this operation are selected by the tuner (43). A demodulation circuit (44)/signal processing circuit (45) extracts a digital signal sequence of a facsimile broadcast signal from the TV radio waves and transmits it to a reception memory (46). The CPU (43) has the reception memory (
46), and when the program selection signal of the desired program is detected, the image signals received thereafter are stored in the code memory 2 (48). The code memory 2 (
48) is reflected in the data buffer (44).

When the CPU (43) learns from the data buffer (44) that there is a received document, it stores the image memory (47),
When the printer device (49), the encoding/decoding circuit (50), etc. are not in use, the code data read from the code memory 2 (48) is transmitted to the encoding/decoding circuit (50), and image expansion is started. do. The decompressed image is output to the printer device (49) through the image memory (47) and recorded on paper.

In this way, the facsimile device (41) becomes capable of receiving facsimile broadcasts by connecting the cartridge (42).

Note that the present invention is not limited to the above embodiments.

For example, the facsimile machine does not have to be of G3 standard. However, considering its popularity, price, transmission speed, etc., the 03 machine is optimal as a facsimile machine that can be connected to a receiving device that is compatible with the digital facsimile broadcasting that has been proposed. Furthermore, the shape of the expansion cartridge
The connection method etc. can also be changed in various ways.

(g) Effects According to the present invention, there are great effects such as being able to receive facsimile broadcasts and conventional wired communications without interfering with wired communications.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a facsimile broadcast receiving apparatus according to an embodiment of the present invention, Fig. 2 is a diagram showing the signal structure of facsimile broadcasting, Fig. 3 is a block diagram of a conventional facsimile broadcast receiving apparatus, and Fig. 4 is the same. <A configuration diagram of a conventional facsimile broadcast receiving apparatus, FIG. 5 is a configuration diagram of another embodiment of the present invention, FIG. 6 is a configuration diagram of another embodiment of the present invention, and FIGS. 7(a) and (b) are the same. 8A and 8B are electrical block diagrams of the facsimile apparatus and cartridge of the embodiment. FIGS. 8(a) and 8(b) are main part configuration diagrams of the embodiment. (18) (32)... code memo

Claims (5)

[Claims] (1) A receiving circuit that receives facsimile broadcasting and obtains a facsimile code sequence, a communication control circuit that performs wired facsimile communication and obtains a facsimile code sequence, and a recording means that decodes and prints the facsimile code sequence; In a facsimile broadcast receiving device that has a function of switching between broadcast reception and wired facsimile communication as appropriate and printing and recording received images of both, the facsimile code series received by the facsimile broadcast receiving circuit is stored, and a predetermined facsimile code sequence is stored. The present invention is provided with a storage means that can be read out at the timing of , and stores code sequences of facsimile broadcasts in the storage means, and sequentially reads them out from the storage means and prints them when wired facsimile communication is not being performed. Features of facsimile broadcast receiving equipment. (2) In the invention set forth in claim (1), the facsimile broadcast receiving device is characterized in that when reading and printing a facsimile code series from the storage means, printing is performed at approximately the highest speed that the facsimile device can process. . (3) The invention according to claim (1), comprising: an adapter device including the receiving circuit and storage means; and a facsimile device configured separately from the adapter device and including the communication control circuit and recording means; The adapter device stores the facsimile code sequence obtained from the receiving circuit in the storage means while the communication is detected by the means for detecting the communication of the facsimile device, and after the communication ends, the adapter device stores the facsimile code sequence obtained from the receiving circuit in the storage means. A facsimile broadcast receiving apparatus characterized in that a facsimile code sequence stored in the storage means is read out at a time and inputted to the facsimile machine. (4) In the invention set forth in claim (3), when an incoming call is received from a wired system while receiving a facsimile broadcast signal,
A facsimile broadcast receiving apparatus characterized in that the printing of facsimile broadcast signals is interrupted at a predetermined timing and the incoming call is accepted. (5) The facsimile broadcast receiving device according to claim (1), wherein the cartridge device including the receiving circuit and storage means is installed in a function expansion slot of a facsimile device.