JPH05145679A - Facsimile broadcast receiver - Google Patents

Abstract

PURPOSE:To receive both information without missing by providing a line control means selecting facsimile broadcast data or facsimile information from a telephone line to the receiver. CONSTITUTION:This facsimile broadcast reception adaptor is provided with a tuner section 11 receiving a television broadcast radio wave and using the received wave as a voice base band signal, a demodulation section 12 extracting a facsimile channel signal from the voice base band signal, implementing four- phase differential phase demodulation, and reproducing a clock and data, a frame synchronization reproduction section 13, a data fetch section 14, a signal processing section 15, a storage section 20, a protocol control section 17 to be connected to a facsimile equipment, a MODEM section 18 and a line control section 21. Even when the facsimile information from a telephone line and a facsimile broadcast desired to be received are overlapped, the line control section 21 is used to select a connection line to the facsimile equipment to receive the information without missing.

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.

In particular, the present invention relates to a facsimile broadcast receiving adapter which is used by connecting to a facsimile which is used by being connected to a telephone line to receive and print a facsimile broadcast.

[0003]

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

FIG. 3 is a schematic diagram showing the usage status of the facsimile broadcast receiving adapter. Here, 1 is a facsimile broadcast receiving adapter, 2 is a facsimile connected for printing and recording, 3 is an antenna for receiving television broadcast radio waves, and 5 is a connecting line connecting the facsimile broadcasting receiving adapter 1 and the facsimile 2. is there.

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

FIG. 5 is a diagram showing a transmission time sequence of one page of facsimile broadcast data. Facsimile broadcast signals are basically composed of control signals and image signals. The control signals are 6-frame network signals or blank signals, 6-frame program selection signals, and page end signals of 3 or more packets. Alternatively, a program end signal is included. 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. 4 is a block diagram of a facsimile broadcast receiving adapter 1 which receives such a facsimile broadcast, connects it to the facsimile 2 and prints and records it. That is, a tuner unit 11 that receives a television broadcast wave and demodulates it into a voice baseband signal, and a demodulator unit 12 that extracts a facsimile channel signal from the voice baseband signal and performs 4-phase differential phase demodulation to reproduce a clock and data.
Then, the frame synchronization reproduction section 13 for surely detecting the frame synchronization signal indicating the beginning of one frame and reproducing the frame synchronization signal synchronized with the transmission side, and the descrambling process and the deinterleaving process were performed. The data fetching unit 14 that performs post-error correction and fetches the facsimile signal is compared with the reception reserved program preset on the receiving side and the program selection signal of the fetched data to determine the subsequent fetching of image data. A signal processing unit 15 for
A buffer memory 16 for temporarily storing image data necessary for connection with a facsimile for printing and recording, a protocol control unit 17 for controlling a protocol for connecting with the facsimile 2, and a modem for connecting with the facsimile 2. And a line connection section 19 for connecting facsimile broadcast data to a facsimile.

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. PLL with 4-phase differential phase modulation
The clock and data are reproduced by the frame synchronization reproduction unit 13, and the frame synchronization signal at the beginning of one frame is surely detected by the frame synchronization reproduction unit 13 to reproduce the frame synchronization signal synchronized with the transmission side and use it as a reference signal for data acquisition. The data capturing unit 14 performs descrambling processing and deinterleaving processing, captures one frame data unit, then performs error correction processing for each packet, and the signal processing unit 15 sets reception reservation set in advance on the receiving side. The program numbers of the program and the fetched facsimile broadcast data are compared to determine whether to fetch the subsequent image data, and the necessary image data is temporarily stored in the buffer memory 16, and the line connection unit 19 transmits the facsimile broadcast data to the facsimile 2 , So that the protocol control unit 17 is activated,
The connection procedure with the facsimile 2 is executed through the modulator / demodulator 18, and then the facsimile broadcast image data being stored in the buffer memory 16 is operated to be output to the facsimile 2 to print the facsimile broadcast data on the facsimile.

Here, since the facsimile broadcast data is sequentially transmitted at a constant speed, the buffer memory 16
Is provided for temporarily storing facsimile broadcast data for a time period during which protocol control for connecting to the facsimile 2 is performed, facsimile broadcast data due to a difference in transmission speed of the facsimile broadcast data and processing speed of the facsimile 2, and the like. ing.

[0010]

In such a facsimile broadcasting receiving system, the facsimile connected for printing and recording not only prints and records the information from the facsimile broadcasting, but also uses the telephone line for the original purpose. It is also required to print and record facsimile information.

Further, a request for receiving facsimile information may be issued from a telephone line during reception of a facsimile broadcast, or a facsimile broadcast desired to be received may be sent from the telephone line during an incoming call.

However, the conventional facsimile broadcast receiving apparatus could only receive one of the information when the facsimile information from the telephone line and the desired facsimile broadcast overlap.

[0013]

In order to solve the above problems, the present invention solves the above problems by a tuner for receiving a television broadcast wave and selecting a desired channel, a demodulation means for demodulating a received facsimile signal, and a demodulation means. Frame synchronization reproducing means for reproducing the frame synchronization from the received facsimile signal on the receiving side, data fetching means for fetching data by descramble processing and deinterleave processing of the demodulated facsimile signal, and fetching by the data fetching means Signal processing means for receiving the received facsimile data, storage means for temporarily storing the image data extracted by the signal processing means, and protocol control means for controlling the protocol for connecting to the facsimile. , A modulation / demodulation means (modem) for modulating / demodulating control data and image data and a received frame In a facsimile broadcast receiving adapter provided with a line connecting means for connecting the facsimile transmission data to a facsimile, a line control means for switching the connection to the facsimile for printing and recording between the facsimile broadcast data and the facsimile information from the telephone line depending on the situation. Is provided.

[0014]

According to the facsimile broadcast receiving apparatus having the above-mentioned structure, even when the facsimile information from the telephone line and the facsimile broadcast to be received are overlapped, the line control means switches the connection line to the facsimile to obtain the information. You can receive without losing information.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The facsimile broadcast receiving apparatus of the present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 2 is a schematic diagram showing the usage status of the facsimile broadcast receiving adapter. Here, as shown by attaching the same reference numerals to the same parts as those in the conventional example of FIG. 3, 1 is a facsimile broadcast receiving adapter, 2 is a facsimile connected for printing and recording, and 3 is for receiving television broadcast radio waves. , 4 is a telephone line for transmitting facsimile information and telephone, and 5 is a connection line for connecting the facsimile broadcast receiving adapter 1 and the facsimile 2. Facsimile 2 is supplied with both facsimile broadcast information and telephone line facsimile information.
The facsimile broadcast receiving adapter 1 is provided with a change-over switch 6 to control the change over so that it can be printed and recorded.

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

Here, as in the conventional example shown in FIG. 4, a tuner section 11 which receives and demodulates a television broadcast wave to produce a voice baseband signal, and a four-phase differential by extracting a facsimile channel signal from the voice baseband signal. A demodulation unit 12 that performs phase demodulation and reproduces clock and data, and a frame synchronization reproduction unit that surely detects a frame synchronization signal indicating the beginning of one frame and reproduces a frame synchronization signal synchronized with the transmission side. 13 and a data acquisition unit 14 that performs descramble processing and deinterleave processing, then performs error correction and performs facsimile signal acquisition processing.
And a signal processing section 15 for comparing a reserved program set in advance on the receiving side with a program selection signal of the fetched data to judge fetching of subsequent image data, and for printing and recording by connecting to a facsimile. A storage unit 20 for temporarily storing image data necessary for the facsimile, and a protocol control unit 17 for controlling a protocol for connecting to the facsimile 2.
A facsimile broadcast receiving adapter is constituted by a modem unit 18 for performing modulation / demodulation for connecting to the facsimile 2, and a line control unit 21 for switching between facsimile broadcast data and a telephone line depending on the connection with the facsimile. There is.

The storage unit 20, the modulation / demodulation unit 18 in FIG.
The operation of the line controller 21 will be described in detail. The storage unit 20 has a function of storing and accumulating received facsimile broadcast data for a certain time in addition to the function of the buffer memory 16.
The line control unit 21 is also provided with a conceptual switch 22. Normally, in the standby state, the switch 22 is connected to the terminal a side, and the facsimile 2 is connected to the telephone line 4 via the facsimile broadcast receiving adapter 1. At this time, when the facsimile information is received from the telephone line 4, it is supplied to the facsimile 2 and printed and recorded. In the standby state, when a desired facsimile broadcast program is received, the storage unit 20 is used as a buffer memory for printing and recording the information, and the switch 22 is used as a terminal b.
It is possible to print and record the received data of the facsimile broadcast by connecting to the side.

Next, the line control when the facsimile information from one side is printed and recorded by the facsimile 2 and the other facsimile information arrives will be described.
First, when the facsimile broadcast data to be received arrives while printing and recording the facsimile information from the telephone line 4,
Of course, the switch 22 is on the terminal a side, and the facsimile broadcast data is accumulated in the storage unit 20. On the other hand, during printing / recording of facsimile broadcast information, that is, when the storage unit 20 is used as a data buffer and the switch 22 is connected to the terminal b side, when a telephone call or a request for receiving facsimile information is received from the telephone line 4. , Informs the receiver that there is a request from the telephone line 4 by using a bell, a buzzer, an LED, or the like, and thereby the facsimile information from the telephone line 4 is preferentially connected to the facsimile 2 by a switch or the like at the receiver's discretion. be able to. In this case, the received facsimile broadcast data is accumulated in the storage unit 20, and can be taken out from the storage unit 20 and printed and recorded by the facsimile 2 after the printing and recording of the facsimile information from the telephone line 4 is completed. That is, by switching the switch at the receiver's discretion, the switch 22 is connected to the terminal a, the facsimile broadcast data being received is accumulated in the storage unit 20, and the facsimile information requested to be received from the telephone line 4 is transmitted. It is possible to print and record with priority. At this time, the telephone line 4 cannot be connected unless the switch is switched, but this is in a reception connection waiting state with the facsimile 2 of the other party from the viewpoint of the information sender to the facsimile 2.

The switching by the switch or the like at the judgment of the recipient during the facsimile broadcast reception is not necessarily required to be performed for each incoming request of the facsimile information from the telephone line 4 during the facsimile broadcast reception. If the reception of is set to be priority,
Continues to print and record facsimile broadcast data regardless of the request for receiving facsimile information from the telephone line 4, and
If it is set in advance that the facsimile information from the telephone line 4 has priority, the switch 22 is automatically connected to the terminal a side when the facsimile information is requested to be received from the telephone line 4 even while receiving the facsimile broadcast. Can be stored in the storage unit 20.

The above is a functional description, but when the received facsimile broadcast data is actually connected to the facsimile 2, the facsimile broadcast data is 9760 bps.
(Bit / sec), which is slightly faster than the normal G3 standard facsimile of 9600 bps, and can transfer image data such as the transmission speed of the connected facsimile 2, performance such as 1 line processing time, and time required for protocol control. It will take some time to get there. On the other hand, since the facsimile broadcast data is transmitted at a constant speed, even in the conventional example, the facsimile broadcast receiving adapter 1 has a certain amount of time (30 seconds to 30 seconds) before being transferred to the facsimile 2 for printing and recording.
A buffer memory 16 of a memory equivalent to about 2 minutes) is required. The functions described above can be realized by expanding the storage capacity of the buffer memory 16. That is, the storage unit 20 is an expansion of the buffer memory 16 so that the facsimile broadcast data for several minutes or more can be stored.

Although the line controller 21 is shown as a mechanical switch in FIG. 1, it is actually composed of several relays.

As described above, by expanding the storage capacity of the buffer memory 16 to form the storage unit 20 and providing the line control unit 21, the facsimile broadcast receiving adapter can receive the facsimile information from the telephone line and the facsimile broadcast program to be received. Even if the two overlap, you can receive them without missing both.

[0025]

With the facsimile broadcast receiving adapter according to the present invention, even when the facsimile information from the telephone line and the facsimile broadcast program to be received overlap, it is possible to receive both information without missing.

[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 schematic diagram showing the usage status of the facsimile broadcast receiving adapter of the present invention.

FIG. 3 is a schematic diagram showing the usage status of a conventional example.

FIG. 4 is a block diagram of a conventional example.

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

[Figure 6] TV audio baseband spectrum diagram

[Explanation of symbols]

 1 Facsimile broadcast receiving adapter 2 Facsimile 3 Television receiving antenna 4 Telephone line 5 Connection line 6 Changeover switch 11 Tuner section 12 Demodulation section 13 Frame synchronization reproduction section 14 Data acquisition section 15 Signal processing section 16 Buffer memory 17 Protocol control section 18 Modulation / demodulation Part 19 Line connection part 20 Storage part 21 Line control part 22 Switch

Claims (2)

[Claims] 1. A tuner for receiving a television broadcast wave and selecting a desired channel, a demodulation means for demodulating a received facsimile signal, and a frame synchronization reproducing means for reproducing frame synchronization from the demodulated facsimile signal on the receiving side. A data fetching means for fetching data by descrambling and deinterleaving the demodulated facsimile signal, signal processing means for receiving the facsimile data fetched by the data fetching means, and the signal processing Storage means for storing image data extracted and required by the means, protocol control means for controlling a protocol for connecting to a facsimile, modulation / demodulation means for modulating / demodulating control data or image data, and received facsimile broadcast Equipped with line connection means for connecting data with facsimile The facsimile broadcast receiving adapter is provided with line control means for switching the connection to the facsimile for printing and recording between the facsimile broadcast data and the facsimile information from the telephone line depending on the situation.
A facsimile broadcast receiving device characterized in that it is possible to receive both facsimile information from a telephone line and desired facsimile broadcast data without missing. 2. As the line control means, a priority switch for preferentially connecting either one of the facsimile broadcast data and the facsimile information from the telephone line to the facsimile when the overlapped input is used. The facsimile broadcast receiving apparatus according to claim 1.