JPH04313946A - Facsimile signal receiver - Google Patents

Abstract

PURPOSE:To attain the automatic reception of a supplementary program by demodulating a facsimile signal and selecting alternatively a tuner of a recorded receiver or a tuner of a television receiver. CONSTITUTION:When the reception of a supplement program is designated by an external input device 9, a changeover switch 11 is set to the position of a tuner 12 at the side of a television receiver 2 by the operation of a signal processing section 7, an outputted voice output passes through a BPF of a demodulation section 5 to extract a facsimile signal thereby applying 4-phase differential phase demodulation. Moreover, a data fetch section 6 reproduces a frame synchronizing signal to fetch the facsimile signal. A signal processing section 7 implements error correction of the facsimile signal to detect a program selection signal and an independent program/supplement program designation information is extracted from the program selection signal to confirm it that the program is the supplement program. As a result, when the program is the supplement program, the picture signal is extracted and sent to a recording section 10, in which the signal is decoded into a picture element data and printed out.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a facsimile channel using a second carrier wave in the audio frequency band of television broadcast radio waves, and uses a digitized facsimile signal to convert the second subcarrier wave into four-phase differential phase modulation (4-phase differential phase modulation). Phase DP
The present invention relates to a facsimile signal receiving apparatus in a facsimile signal broadcasting system that multiplexes the facsimile signal into an audio signal and transmits the facsimile signal.

0002

[Background Art] In recent years, this type of facsimile broadcasting system has been put into practical use, but as is clear from the spectrum of the audio frequency band in FIG. The data is carried on a facsimile channel using a second subcarrier provided for transmission. This facsimile signal constitutes one sending unit in frame units as shown in FIG. 5, and one frame consists of 32 packets of data with a 16-bit frame synchronization signal FC added to the beginning. . Each packet consists of a 272-bit data section with a 16-bit mode control code MC added to the beginning, and the mode control code MC includes information bits from the 1st bit to the 5th bit and the 6th bit. It consists of check code bits from bit to 16th bit.

[0003] The facsimile signal receiving device 1 that receives facsimile signals of this type of transmission first reliably detects the timing of a frame synchronization signal indicating the beginning of one frame of data, and then synchronizes it with the sending side. The obtained frame synchronization signal is reproduced, descrambling processing and deinterleaving processing are performed, and facsimile signal capture processing is performed.

FIG. 6 is a diagram showing the order of data transmission for one page. A facsimile signal basically consists 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 page end signal of 3 or more packets. or a program end signal. Here, the network signal is a signal for transmitting operational data between broadcasting stations regarding the network, and the blank signal is inserted to ensure operation time such as cutting the recording paper after printing (receiving). This is a signal that The program selection signal also includes information regarding program selection on the receiver side, such as program number,
It is a signal for transmitting the page number, independent program/complementary program designation, etc. The page end signal is a signal indicating the end of one page of image signals, and the program end signal is a signal indicating the end of the image signal for one page. This signal indicates the end of the image signal. Here, an independent program is an independent program that is unrelated to the television program being broadcast, and a complementary program is a program that complements a television program that is related to the television program that is being broadcast.

[0005] In a facsimile signal receiving device that receives such facsimile signals, the channels, reception start times, program numbers, page numbers, etc. of a plurality of programs for which printout is desired are inputted in advance to the receiving device. It is registered in the reservation memory, and in the actual reception operation, when the reception start time registered in the reservation memory arrives, the program selection signal ( extracting the program number and page number included in FIG. 7) and comparing it with the program number and page number input in advance and registered in the reservation memory
When the two match, the subsequently sent image signal is sampled and decoded, printing output (image reception) is started, and recording is performed. Then, upon reception of a page end signal or a program end signal, recording ends and the recording paper is cut.

[0006]

[Problem to be Solved by the Invention] However, since such a facsimile signal receiving device has a built-in tuner, it is possible to receive programs on any channel independently of the television receiver. Complementary programs on the television receiver, for example, if a cooking program is being broadcast on the television receiver and a menu table is being broadcast by facsimile as a supplementary program to the cooking program, in order to receive the complementary program, There was the inconvenience of having to set the channel of the facsimile signal receiving device to the same channel as the television channel. The present invention has been made in view of the above points, and includes:
It is an object of the present invention to provide a facsimile signal receiving device having a function of automatically tuning the channel to the same channel as a television receiver when receiving a supplementary program.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a tuner that receives a television signal, facsimile demodulation means that demodulates a facsimile signal, and a synchronization signal that is regenerated from the demodulated facsimile signal. a data capture unit that performs scrambling processing and deinterleaving processing, a signal processing unit that performs reception processing of the captured facsimile signal, and a recording unit that decodes the image signal extracted by the signal processing unit into pixel data and prints it out; audio signal input means for inputting an audio signal from an external device; audio signal switching means for switching between an audio signal from a tuner of the facsimile broadcast receiving apparatus and an audio signal input from the audio signal input means; The present invention provides a facsimile signal receiving apparatus comprising a control means for controlling an audio signal switching means. Further, the present invention provides a facsimile signal receiving device in which the audio signal input means is a tuner for a television receiver.

[0008]

[Operation] Therefore, according to the present invention, when reception of a supplementary program is specified from an external input device, facsimile broadcasting on the same channel as the television can be automatically received, and the facsimile receiving device You no longer have to worry about tuning channels.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block electrical circuit diagram showing an embodiment of a facsimile signal receiving apparatus according to the present invention. As is clear from the diagram, the facsimile signal receiving apparatus according to the present invention mainly includes a facsimile signal receiver 1 and a television. It consists of a receiver 2 and an antenna 3 provided in common to the facsimile signal receiver 1 and the television receiver 2, and this antenna 3 receives a television signal multiplexed with facsimile signals.

The facsimile signal receiver 1 includes a tuner section 4 which extracts a television signal of a designated channel and detects a video signal and an audio signal, and a BPF (band pass filter) from the audio signal detected by the tuner section 4. ), which extracts a facsimile signal and demodulates it as a 4-phase differential phase (4-phase DPSK); A data import unit 6 imports data, and performs signal processing such as error correction processing of the data imported by this data import unit, discrimination processing between a control signal including a program number, page number, etc., and an image signal, and also performs program reservation. A signal processing unit 7 that performs key processing such as processing, a channel,
A reservation memory 8 for storing start times, program numbers, page numbers, etc., an external input device 9 for specifying program reservations and reception of supplementary programs, and an encoded image signal of a necessary program as pixel data It consists of a recording section 10 that decodes and prints out the decoded audio signal, and a changeover switch 11 that switches the audio signal input to the demodulation section 5. Further, the television receiver 2 includes a tuner 12 which can be switched to the tuner section 4 alternatively by the changeover switch 11.

The facsimile signal receiving apparatus having such a configuration operates as follows. That is, when independent program reception is specified on the external input device 9, first, the changeover switch 11 is connected to the tuner section 4 on the facsimile signal receiver 1 side by the operation of the signal processing section 7, and the signal is input from the external input device 9 in advance. When the reception start time registered in the reservation memory 8 arrives, tune the tuner section 4 to the specified channel, receive the television signal multiplexed with the facsimile signal from the antenna 3, and tune the channel specified by the tuner section 4. Extracts the television signal and performs audio detection,
The demodulator 5 passes the detected audio signal through a BPF to extract the facsimile signal and performs four-phase DPSK demodulation, and the data importer 6 reproduces the frame synchronization signal and performs descramble processing and deinterleave processing. Import facsimile data.

The signal processing unit 7 corrects errors in the captured facsimile data, detects a program selection signal, extracts the program number and page number from the detected program selection signal, and compares them with the contents of the reservation memory 8. As a result of the comparison, if the program is reserved in advance, the image signal is extracted and recorded in the recording unit 1.
0, decoded into pixel data, and printed out (received image)
be done.

On the other hand, when complementary program reception is designated by the external input device 9, the changeover switch 11 is switched to the tuner 12 on the television receiver 2 side by the action of the signal processing section 7.
The demodulator 5 extracts the facsimile signal by passing the audio detection output from the tuner 12 through the BPF and performs 4-phase DPSK demodulation, and the data importer 6 reproduces the frame synchronization signal and performs descrambling processing. and performs deinterleaving processing to capture the facsimile signal.

The signal processing section 7 corrects errors in the captured facsimile signal, detects a program selection signal, extracts independent program/complementary program designation information from the detected program selection signal, and confirms that it is a complementary program. do. As a result of the confirmation, if it is a supplementary program, the image signal is extracted, sent to the recording section 10, decoded into pixel data, and printed out (received image).

In order to perform the above-described operation, the facsimile signal receiving apparatus includes a tuner section that receives the television signal, facsimile demodulation means that demodulates the facsimile signal, and a synchronization signal that is regenerated from the demodulated facsimile signal. A data importing means that performs scrambling processing and deinterleaving processing, a signal processing means that performs reception processing of the imported facsimile signal, and a recording means that decodes the extracted image signal into pixel data by the signal processing means and prints out the pixel data. an audio signal input means for inputting an audio signal from an external device; an audio signal switching means for switching between an audio signal from the tuner section and an audio signal input from the audio signal input means; and an audio signal input means for inputting an audio signal from an external input device. It is comprised of control means for controlling the switching means.

The operation of the facsimile signal receiving apparatus according to this configuration will be explained based on FIGS. 2 and 3. 2 and 3 are flowcharts of program reception processing. At startup, the program is in a waiting state for reception, and the channel, reception start time, and reception start time of the program you wish to receive are entered in advance from the external input device 9.
Input the program number, page number, and designate an independent program/supplementary program. When reception of an independent program is designated from the external input device 9, the process shifts to the process shown in FIG.

In FIG. 2, in step n1, the reception start time set in advance in the reservation memory 8 is waited for. When the reception start time comes, move to step n2,
In step n2, set the channel to be received,
Move to step n3. In step n3, a program selection signal is detected, and when the program selection signal is detected, step n4
At step n4, the program number and page number are extracted from the detected program selection signal, and at step n5, the program number and page number extracted from the program selection signal are compared with the contents of the reservation memory 8. , step n6
In step n6, it is determined whether a reservation has been made, and if it is determined that a reservation has not been made, the process is terminated and no image signal is captured. In step n6, when it is determined that the reservation has been made, the process moves to step n7.
In step n7, the image signal is captured, and in step n8
In step n8, the captured image signal is decoded and converted into pixel data, and the process moves to step n9.
In step n9, the decoded pixel data is sent to the recording section 7 and printed out.

When reception of a supplementary program is specified from the external input device 9, the process shifts to the process shown in FIG. In this FIG. 3, in step n1, a program selection signal is detected, and when the program selection signal is detected, the process moves to step n2. In step n2, it is determined from the detected program selection signal whether the received program is a complementary program, and the complementary program is When it is determined that it is not,
The process ends and no image signal is captured. In step n2, when it is determined that it is a complementary program,
The process moves to step n3, in which the image signal is captured, and the process proceeds to step n4, in which the captured image signal is decoded and converted into pixel data,
The process moves to step n5, and in step n5, the decoded pixel data is sent to the recording section 7 and printed out.

In the embodiment described above, the demodulator 5 has a BPF for extracting the facsimile signal from the voice detection output, but in another embodiment, the BPF can be installed in the tuner of the broadcast facsimile signal receiver 1 and the television receiver 2. The parts 4 and 12 may each have one.

[0020]

[Effects of the Invention] Therefore, according to the present invention, when reception of a supplementary program is specified from an external input device, it is possible to automatically receive a facsimile signal on the same channel as the external device, for example, a television receiver. This eliminates the trouble of tuning the channel of the facsimile signal receiving device.

[Brief explanation of drawings]

FIG. 1 is a block electrical circuit diagram showing an embodiment of a facsimile signal receiving device according to the present invention.

FIG. 2 is a flowchart of program reception processing when the facsimile signal receiving apparatus of the present invention is designated to receive an independent number.

FIG. 3 is a flowchart of program reception processing when the facsimile signal receiving apparatus of the present invention is designated to receive a supplementary program.

FIG. 4 is a diagram showing a spectrum of an audio frequency band in a facsimile signal broadcasting system.

FIG. 5 is a diagram showing the structure of one frame of a digitized facsimile signal.

FIG. 6 is a diagram showing the transmission order of one page of the facsimile signal.

FIG. 7 is a diagram showing a program selection signal included in the facsimile signal.

[Explanation of symbols]

1 Facsimile signal receiver 2 Television receiver 3 Antenna 4 Tuner section 5 Demodulation section 6 Data import section 7 Signal processing section 9 External input device 10 Recording Department 11 Selector switch 12 Tuner

Claims (2)

[Claims] Claim 1: A facsimile channel using a second subcarrier is provided in the audio frequency band of television broadcast waves, and the second
The system is applied to a facsimile signal broadcasting system that modulates subcarriers and multiplexes them into an audio signal for transmission.
a tuner unit that receives a television signal; a facsimile demodulation unit that demodulates the facsimile signal; a data capture unit that reproduces a synchronization signal from the demodulated facsimile signal and performs descramble processing and deinterleaving processing; a signal processing means for performing signal reception processing; a recording means for decoding the image signal extracted by the signal processing means into pixel data and printing it out; and an audio signal input means for inputting an audio signal from an external device. , comprising an audio signal switching means for switching between an audio signal from the tuner section and an audio signal input from the audio signal input means, and a control means for controlling the audio signal switching means from an external input device. A facsimile signal receiving device. 2. The facsimile signal receiving apparatus according to claim 1, wherein said audio signal input means is a tuner of a television receiver.