JPH05110747A - Facsimile broadcast reception adaptor - Google Patents

Abstract

PURPOSE:To provide the facsimile broadcast reception adaptor provided with a test signal generating function and a FILL bit adjustment section for adjusting a processing time of one line, confirming the operation of the facsimile broadcast reception adaptor main body even when a facsimile broadcast signal is not sent, confirming the connection with a facsimile equipment connected for print recording and setting an optimum connection state. CONSTITUTION:The facsimile broadcast reception adaptor 1 receiving a facsimile broadcast and outputting a signal used to implement the print recording by a facsimile equipment is provided with a test signal generating means 20 and a line processing time adjustment means 21 and confirms the operation of the facsimile broadcast reception adaptor main body and the connection with a facsimile equipment even when no facsimile broadcast signal is sent to set the optimum connection state as its feature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a facsimile channel with a second subcarrier in the audio frequency band of television broadcast radio waves, performs four-phase differential phase modulation with a facsimile signal, and multiplexes the audio signal for transmission. The present invention relates to a facsimile broadcast receiving apparatus for receiving a facsimile broadcast, and more particularly, to a facsimile broadcast receiving adapter used by connecting to a facsimile which is used by connecting to a telephone line for receiving and printing a facsimile broadcast.

[0002]

2. Description of the Related Art In recent years, the above-mentioned facsimile broadcasting system has been put into practical use.

FIG. 3 is an image diagram showing a usage state of a facsimile broadcast receiving adapter which is one of the facsimile broadcast receiving apparatuses. 1 is a facsimile broadcast receiving adapter, 2 is a facsimile to be connected for printing and recording, 3
Is an antenna for receiving television broadcast waves, 4
Is a telephone line for transmitting facsimile information and telephones,
Reference numeral 5 is a line connecting the facsimile broadcast receiving adapter and the facsimile. A changeover switch is provided in the facsimile broadcast receiving adapter to control the changeover so that both the information by the facsimile broadcast and the facsimile information by the telephone line can be printed and recorded on the facsimile 2.

FIG. 4 is a diagram showing the structure of one frame which is one transmission unit of a facsimile signal. The data portion of one packet is composed of 272 bits (34 bytes) of digital data, and a 16-bit (2 bytes) mode control (MC) code is added to the front of each data portion, and 288 bits (36 bytes). One byte consists of 1 byte. Furthermore, one frame is composed of 32 packets, and a 16-bit (2 bytes) frame synchronization signal is added to the beginning of the frame.
That is, one frame is composed of 9232 bits (1154 bytes).

This frame data consists of a 16-bit frame synchronization signal (FC) followed by data in the frame vertically (starting from the first bit of each packet across packets).
It is output bit by bit (interleave processing). Furthermore, in order to give randomness to the transmitted data and enable the bit clock to be reproduced on the receiving side, scramble processing that takes an exclusive OR with the pseudo random signal sequence for each frame is performed on the data excluding the frame synchronization signal. Go and be sent out.

FIG. 5 is a diagram showing a transmission time sequence of one page of facsimile broadcast data. The facsimile signal is basically composed of a control signal and an image signal, and the control signal includes a 6-frame network signal or blank signal, a 6-frame program selection signal, and a 3 frame program signal.
It includes a page end signal or a program end signal of packets or more. The program selection signal is composed of a program number, a page number, an update number, and the like so that the receiving side can determine whether or not to capture and print the image signal that follows it.

FIG. 6 is a diagram showing a baseband spectrum of television sound on which facsimile broadcast data is multiplexed. In addition to the main audio channel and the sub audio channel, a facsimile channel by a second subcarrier is provided and the facsimile broadcasting is carried out here. Data is multiplexed.

As shown in FIG. 7, the facsimile broadcast receiving adapter 1 which receives such a facsimile broadcast, connects it to a facsimile, and prints and records it, receives a television broadcast wave and demodulates it into an audio baseband signal. The tuner unit 11, the demodulation unit 12 for extracting the facsimile channel signal from the voice baseband signal, performing the four-phase differential phase demodulation to reproduce the clock and the data, and surely detecting the frame synchronization signal indicating the beginning of one frame, A frame synchronization reproducing section 13 for reproducing a frame synchronization signal synchronized with the transmitting side, a data capturing section 14 for performing error correction after performing descramble processing and deinterleaving processing, and a facsimile signal capturing processing. Compare the preset reserved program and the program selection signal of the captured data and Signal processing unit 15 for determining whether to take in the image data following the above, a storage unit 16 for temporarily storing image data necessary for connection with a facsimile to print and record, a protocol control for controlling a protocol for connecting with the facsimile. It comprises a unit 17, a modulation / demodulation (modem) unit 18 that performs modulation / demodulation for connecting to a facsimile, and a line control unit 19 that switches the facsimile broadcast data and the telephone line depending on the situation.

In the above-mentioned facsimile broadcast receiving adapter, when a television signal in which a facsimile signal is multiplexed is received by the antenna 3, the tuner section 11 demodulates it into an audio baseband signal, and the demodulation section 12 extracts a facsimile channel signal. The four-phase differential phase modulation is performed, the clock and data are reproduced by the PLL, the frame synchronization signal which is the head of one frame is surely detected by the frame synchronization reproduction unit 13, and the frame synchronization signal synchronized with the transmission side is reproduced. As a reference signal for data capture, the data capture unit 14 performs descrambling processing and deinterleaving processing, captures in 1-frame data units, and then performs error correction processing for each packet. Reservation reservation program set in and the imported facsimile broadcast data The program numbers are compared to determine the subsequent capture of image data, the necessary image data is temporarily stored in the storage unit 16, and the line control unit 19 controls the facsimile broadcast data to be transferred to the facsimile. The control unit 17 starts up, executes a connection procedure with a facsimile through the modulation / demodulation unit 18, and thereafter operates to output the image data of the facsimile broadcast stored in the storage unit 16 to the facsimile, thereby transmitting the facsimile broadcast data to the facsimile. Print and record on.

[0010]

However, in such a facsimile broadcasting system, since the signal of the facsimile broadcasting is not always transmitted, when the signal of the facsimile broadcasting is not transmitted, the facsimile broadcasting reception is performed. It is not possible to confirm the operation of the adapter body, the connection with the facsimile for printing and recording, and the general confirmation. Therefore, when the facsimile broadcast receiving adapter is installed, it cannot be determined whether the facsimile broadcast receiving adapter is properly connected.

In general, although commercially available facsimiles have a defined communication protocol, there are many types of facsimiles, and there are some models that require more processing time than the time declared to the connection partner, such as the processing time for one line. In the case of facsimile broadcasting, data is sequentially sent out at a constant speed in one way, so it must be used near the limit of the processing capacity of the connected facsimile machine, and it is necessary to set so that the required capacity of the storage unit is reduced.

The present invention has been made in view of the above points, and has a test signal generating function and a line processing time adjusting unit for adjusting the processing time of one line in a facsimile broadcasting receiving adapter, Proposal of a facsimile broadcast receiving adapter that can check the operation of the facsimile broadcasting adapter body even when the signal of is not sent, and can confirm the connection with the facsimile to be connected for printing and record and set the optimum connection state. The purpose is to do.

[0013]

In order to achieve the above object, the present invention has a tuner for receiving a broadcast wave and selecting a desired channel, a demodulating means for demodulating a received facsimile signal, and a demodulating means. Frame synchronization reproducing means for reproducing the frame synchronization from the facsimile signal on the receiving side, data capturing means for capturing the data by descramble processing and deinterleave processing of the demodulated facsimile signal, and the data capturing means for capturing the data. Signal processing means for receiving facsimile data, storage means for temporarily storing image data extracted by the signal processing means, protocol control means for controlling a protocol for connecting to a facsimile, and control Modulation and demodulation means (modem) for modulating and demodulating data and image data, and facsimile broadcast reception adapter In or a telephone line and a facsimile broadcast reception adapter and a circuit control means for controlling the connection, a test signal generating means having the frame structure are provided.

Further, in the above-mentioned facsimile broadcast receiving adapter provided with the test signal generating means, when the image data of the storage means is transferred to the connected facsimile, the bit number of one line is detected and the insertion of the FILL bit is adjusted. A line processing time adjusting means is provided.

[0015]

According to the above construction, even when the facsimile broadcast is not serviced, not only the operation confirmation of the facsimile broadcast receiving adapter main body is confirmed by the test signal inside the adapter, but also the facsimile which is connected to the adapter main body and prints and records. The connection can be easily confirmed.

Further, the line processing time adjusting means can easily set the optimum connection state.

[0017]

1 is a block diagram of an embodiment of a facsimile broadcast receiving adapter of the present invention.

In the present invention, a facsimile broadcast is received,
A facsimile broadcast receiving adapter 1 for connecting to a facsimile to print and record, a tuner unit 11 for receiving and demodulating television broadcast radio waves to produce a voice baseband signal, and a facsimile channel signal from the voice baseband signal to extract a four-phase differential phase. A demodulation unit 12 for demodulating and reproducing clock and data; a frame synchronization reproducing unit 13 for surely detecting a frame synchronization signal indicating the beginning of a frame and reproducing a frame synchronization signal synchronized with the transmitting side; A data capturing unit 14 that performs descramble processing and deinterleave processing, then performs error correction and capture processing of a facsimile signal, compares a reception reserved program preset on the receiving side with a program selection signal of the captured data. Signal processing unit 1 for determining whether to capture image data subsequent to
5. Storage unit 16 for temporarily storing image data necessary for connection with a facsimile for printing and recording, protocol control unit 17 for controlling a protocol for connection with a facsimile, and modulation / demodulation for connection with a facsimile A modulation / demodulation (modem) unit 18, a line control unit 19 for switching the facsimile broadcasting data and a telephone line depending on the connection with the facsimile, a confirmation of the operation of the facsimile broadcasting receiving adapter main body and a connection confirmation with a facsimile to be connected for printing and recording Therefore, when transferring the image data of the test signal generation unit 20 and the storage unit 16 having the test signal generation function of the scrambled or interleaved frame unit to the connected facsimile, the number of bits of one line is detected and the FILL bit is inserted. The line processing time adjusting unit 21 for adjusting That.

The line processing time adjusting unit 21 can adjust the minimum transfer time of one line by inserting a FILL bit (0 data), and the adjustment can be performed by an external setting switch. .. This external setting switch may be a hardware switch or a key input switch for program reservation.

Further, the test signal generator 20 is normally RO
It is composed of M (read only memory) or the like, has a frame structure, and stores test signal data in frame units. For example, in a system in which the frame synchronization reproducing unit 13 and the data fetching unit 14 are programmatically processed by the CPU, the test signal data may be inserted in the empty area of the program ROM.

FIG. 2 shows the frame synchronization reproducing unit 13 and the data capturing unit 1 in the case where the frame synchronization reproducing unit 13 and the data capturing unit 14 are processed programmatically by one CPU.
4 shows an implementation block diagram of FIG.

This portion is detected by the FC detection circuit 30 which detects the FC pattern from the demodulated data, the SP conversion circuit 31 which performs serial / parallel conversion to input the demodulated data to the CPU, and the FC detection circuit 30. The stable reproduction of the FC programmatically by the FC and the demodulated clock, and input the demodulated data,
It is composed of a CPU 32 that fetches data by performing descrambling and deinterleaving, a ROM 33 that stores a program 33a to be processed by the CPU 32 and test signal data 33b, and a fetch buffer 34 that stores the fetched data.

The test signal data 33b stores data that is scrambled and interleaved in frame units.

For example, when the test print mode is entered by an operation that is not normally used, such as inputting a certain key when the power is turned on, the CPU 32 does not reproduce the FC by the signal from the FC detection circuit 30, but the CPU 32 itself. FC is generated at regular FC intervals at a timing, and the test signal data 33b is fetched from the ROM 33 in synchronization with this FC. At this time, the CPU performs descrambling processing and deinterleaving processing in the same manner as normal received data,
Store in the capture buffer 34. The following processing is the same as the processing when a facsimile broadcast signal is received, and the operation of the facsimile broadcast reception adapter can be confirmed.

In the case of the facsimile broadcast receiving adapter, it is necessary to confirm the connection with the facsimile for printing and recording, and this test signal can be used. There are various types of facsimiles, and even if the FILL bit is inserted according to the protocol, the facsimile process may not be in time and an error may occur. In that case, for example, a test signal with a small amount of data on one line such as a diagonal line is generated and an error can be easily recognized. can do.

Even when the signal of the facsimile broadcast is not multiplexed, only the frame synchronization signal is always transmitted during the broadcasting time of the television.
Tuner 1 whose operation could not be confirmed by the above test signal
1, the operation confirmation of the demodulation unit 12 and the frame synchronization reproduction unit 13 can be performed. For example, when the frame synchronization signal is detected and reproduced on the receiving side, the LED may be turned on so as to be confirmed. As described above, according to the present invention, the operation of the main body of the facsimile broadcast is confirmed even when the signal of the facsimile broadcast is not transmitted, and the connection confirmation with the facsimile to be connected for print recording and the optimum connection state are performed. You can make settings.

[0027]

The facsimile broadcast receiving adapter according to the present invention has the test signal generating means inside the adapter,
Not only can you check the operation of the main body of the facsimile broadcast receiving adapter, but you can also check the connection between the facsimile broadcast receiving adapter that receives the facsimile broadcast and the facsimile that prints and records it at any place at any time without a facsimile broadcast signal. , Installation and connection confirmation are easy.

Further, by adding a line processing time adjusting means inside the adapter, it becomes easy to set the optimum connection state with the facsimile.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a facsimile broadcast receiving adapter of the present invention.

FIG. 2 is a block diagram showing an example of a test signal generating mechanism.

FIG. 3 is an image diagram showing a usage state of a facsimile broadcast receiving adapter.

FIG. 4 is a configuration diagram of one frame of facsimile broadcasting.

FIG. 5 is a diagram showing a transmission time sequence of one page of facsimile broadcast data.

FIG. 6 is a baseband spectrum diagram of television sound.

FIG. 7 is a block diagram of a conventional example.

[Explanation of symbols]

1 Facsimile Broadcast Receiving Adapter 2 Facsimile 3 Television Receiving Antenna 4 Telephone Line 5 Line Connecting Facsimile Broadcast Receiving Adapter and Facsimile 11 Tuner Section 12 Demodulation Section 13 Frame Synchronization Playback Section 14 Data Acquisition Section 15 Signal Processing Section 16 Storage Section 17 Protocol control unit 18 Modulation / demodulation unit 19 Line control unit 20 Test signal generation unit 21 FILL bit adjustment unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Sasaki 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation

Claims (2)

[Claims] 1. A tuner for receiving a broadcast wave and selecting a desired channel, and a demodulator for demodulating a received facsimile signal in a facsimile broadcast receiving adapter used by connecting to a facsimile for receiving and printing a facsimile broadcast. Means, frame synchronization reproducing means for reproducing frame synchronization from the demodulated facsimile signal on the receiving side, data capturing means for descrambling and deinterleaving the demodulated facsimile signal to capture data, and said data capturing means. Signal processing means for receiving the facsimile data fetched by the loading means, storage means for temporarily storing the image data extracted and required by the signal processing means, and a protocol for connecting to the facsimile Protocol control means for controlling Facsimile, characterized in that it is provided with a modulation / demodulation means for modulating / demodulating data and a line control means for controlling a line for connecting received facsimile broadcast data with a facsimile, and a test signal generating means having a frame structure is provided. Broadcast receiving adapter. 2. A line processing time adjusting means for detecting the number of bits of one line and adjusting the insertion of FILL bits when the image data in the storage means is transferred to a connected facsimile is provided. The facsimile broadcast receiving adapter according to claim 1.