JPH0417452A - Facsimile broadcast receiver - Google Patents

Abstract

PURPOSE:To avoid waste of recording paper by providing a memory section and a video interface section and sending a picture signal to a printer section through the memory section. CONSTITUTION:A picture signal decoding section 4 decodes a picture signal separated from a facsimile signal and a decoded picture signal is fed to a memory section 6. When a program is received, the picture signal after decoding is sequentially written in the memory section 6 and displayed on a monitor screen through a video interface section 7. When the display screen of the monitor is occupied, the succeeding picture signal is displayed sequentially with scroll and the end of program is displayed. A recipient observes the sent program content on the monitor screen and in the case of making a hard copy, an instruction is given to a system control section 5 by a keyboard or the like and a picture signal of the memory section 6 is sent to a printer section 8, in which the picture signal is printed out on recording paper to obtain a hard copy.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a facsimile channel using a second subcarrier in the audio frequency band of television broadcast waves, and a facsimile machine that multiplexes and transmits a facsimile signal with an audio signal. Regarding facsimile broadcast receiving equipment that receives broadcasts,
In particular, the present invention relates to a facsimile broadcast receiving apparatus that can efficiently obtain only necessary information as a hard copy.

[Conventional technology]

In February 1989, the Telecommunications Technology Council reported a method of facsimile broadcasting in which a facsimile channel using a second subcarrier is provided in the audio frequency band of television broadcast waves, and the facsimile signal is multiplexed and transmitted on the audio signal. .

Figures 4 and 5 are diagrams showing part of the specifications.
The figure is a configuration diagram of a facsimile signal for one page, and FIG. 5 is a spectrum diagram illustrating how the facsimile signal is frequency-multiplexed with the voice signal.

As shown in FIG. 4, the facsimile signal is composed of a control signal and an image signal. A network signal 21 in the control signal is a signal for transmitting operational data between broadcast stations. The program selection signal 22 is a signal for transmitting control information regarding program selection on the receiver side. The page or program end signal 24 is a signal indicating to the receiving device the end of the image signal for one page, and also contains information regarding the presence or absence of the next page, etc. The image signal 23 is an image data signal for one page.

Furthermore, as shown in Figure 5, the facsimile signal is 70.8KH2 (4.5XfH2) outside the television audio signal band.
, fH is the horizontal synchronizing signal frequency), a data channel is provided using a second subcarrier (also referred to as a facsimile signal subcarrier), and the data is transmitted by performing four-phase differential phase modulation at a transmission rate of 16 Kb/s.

FIG. 6 is a diagram showing an example of a conventional configuration of a facsimile broadcast receiving apparatus based on such specifications.

In the figure, 1 is an antenna that receives television broadcast radio waves, 2 is a tuner unit that receives a desired channel from the radio waves received by antenna 1 and obtains an audio detection output, and 3 is a facsimile channel that receives audio detection output from tuner unit 2. A demodulating section which separates the signal and demodulates the phase modulated signal to obtain a facsimile signal; 4 is an image signal decoding section which decodes the image signal portion from the facsimile signal demodulated by the demodulating section 3; 5 is a demodulating section 3 decodes the control signal portion from the demodulated facsimile signal and controls the system; 8 prints the image signal decoded by the image signal decoder 4 on recording paper as a hard copy; This is the printing section.

Next, the operation will be explained. A tuner section 2 selects a desired channel of the television broadcast waves received by the antenna 1 and obtains an audio detection output.

The demodulator 3 separates the facsimile channel signal from the voice detection output and demodulates the phase modulated signal to obtain a facsimile signal. This facsimile signal is input to the image signal decoding section 4 and the system control section 5, respectively.The image symbol decoding section 4 separates the image signal from the facsimile signal and decodes it. The system control unit 5 is composed of, for example, a microcomputer,
The printing section 8 is controlled by comparing and collating information input from a keyboard (not shown) and the control signal separated from the facsimile signal. In the printing unit 8, a printing mechanism is controlled by a signal from the system control unit 5, and the image signal decoded from the image signal decoding unit 4 is printed onto recording paper.

Problems to be Solved by Invention C] Since the conventional facsimile broadcast receiving device is configured as described above, information can only be obtained as a hard copy, so there is a problem that recording paper is wasted. there were.

This invention was made to solve the above-mentioned problems, and provides a facsimile broadcast receiving device that can efficiently obtain only the truly necessary information as a hard copy without wasting recording paper. The purpose is to obtain.

[Means to solve the problem]

A facsimile broadcast receiving apparatus according to the present invention includes a memory unit that stores a decoded image signal, and a video interface unit that displays the stored decoded image signal in the form of a soft copy on a monitor screen. In addition, the image signal is transmitted to the printing section through the memory section.

[Effect]

In this invention, the decoded image signal is stored in memory and the information can be checked on the monitor screen, so only the truly necessary information can be selected from the broadcast facsimile program and efficiently You can make copies and eliminate waste of recording paper.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing the configuration of a facsimile broadcast receiver according to an embodiment of the present invention. In the figure, the same reference numerals as in FIG. 6 indicate the same or corresponding parts. Reference numeral 6 denotes a memory unit for storing the image signal composited by the image signal decoding unit 4, and 7 a video interface unit for displaying the decoded image signal stored in the memory unit 6 in the form of a soft copy on a monitor screen. be.

Next, the operation will be explained. The tuner section 2C selects a desired channel of the television broadcast waves received by the antenna 1 and obtains an audio detection output.

The demodulator 3 separates the facsimile channel signal from the voice detection output and demodulates the phase modulated signal to obtain a facsimile signal. This facsimile signal is given to the image signal decoding section 4 and the system control section 5, respectively. The image signal decoding section 4 decodes the image signal separated from the facsimile signal and sends the decoded image signal to the memory section 6. The image signal stored in the memory section 6 is displayed in the form of a soft copy on the monitor screen through the video interface section 7, and if necessary, the image signal in the memory section 6 is printed out as a hard copy by the printing section 8. do. The system control section 5 compares and collates the control signal separated from the facsimile signal demodulated by the demodulation section 3 with information inputted from a keyboard (not shown), etc. The interface section 7 and the printing section 8 are controlled.

A conceivable method for receiving a program is for the recipient to be near the receiver while the program is being broadcast, and to check the information being sent on a monitor while receiving the program.

The memory configuration of the memory unit 6 and the operation of the entire system at this time will be explained. FIG. 2 shows the memory configuration of the memory section 6, which has a capacity (1728 dots x 2287 lines) to accommodate the decoded image signal of one page of a program. The area indicated by the broken line in the figure indicates the area that can be displayed on the monitor screen at one time, and it is assumed that approximately 1/3 of one page of the program (800 lines in the figure) can be displayed. do.

When a program is received, the decoded image signals are sequentially written into the memory section 6 and displayed on the monitor screen through the video interface section 7. When the display screen of the monitor becomes full, subsequent image signals are displayed by scrolling the screen one by one until the end of the program. The receiver watches the program contents sent to him halfway or to the end on a monitor screen and decides whether to make a hard copy or not. When making a hard copy, a command is given to the system control unit 5 from a keyboard or the like, and the image signal in the memory unit 6 is sent to the printing unit 8 to be printed on recording paper, thereby obtaining a hard copy.

Next, a case where pages or programs are broadcast successively will be explained.

It is more convenient for the receiver to clear the display on the monitor screen when the next page or program is sent so that he can see that a new page or program has been sent. At this time, one possible method is to clear all of the memory section 6 at the same time as the next page or program starts, but if the next page or program starts in the middle of hard copying the previous page or program, the memory is cleared. The problem arises that it is not possible to make a complete hard copy.

Therefore, in the apparatus of this embodiment, printing starts at the latest at or before the start of the program selection signal for the next page, and by the time the image signal for the next page is transmitted, the memory of the part to be first displayed on the monitor screen is The image signal of the previous page is printed in the area, and when the transmission of the image signal of the next page starts, that part is cleared, the image signal of the next page is written, and it is displayed on the monitor. .

The chronological operation of the memory section 6 and printing section 8 of the apparatus will be explained using FIG.

It is assumed that the transmission of the image signal of the first page has already been completed, and the image signal of the last line (2287 lines) of the first page has been decoded and written in the memory. Printing is started simultaneously with the start of the program selection signal for the second page, and printing is performed at a speed that can print the monitor display screen area (800 lines) during the program selection signal period (approximately 3.5 seconds).

A printing speed of approximately 4 ms/line is required, which is a achievable value. It takes about 9 seconds to finish printing.

On the other hand, at the same time as the transmission of the image signal transmitted following the program selection signal starts, the memory section 6 clears the portion (up to 800 lines) to be displayed on the monitor screen first, and stores the image signal of the second page in the memory. Write in sequence. At this time, since the image signals up to the 800th line of the first page have already been printed, there is no problem in printing.

The image signal of the second page is then sequentially written to the memory up to 800 lines, but the transmission time of one line is defined as a minimum of 10 m s / line in the standard, so 800 lines is the minimum time. Even if it were to be transmitted, it would take 8 seconds.

On the other hand, in printing, since printing of the first page has already been completed by that time, there is no problem even if the memory after the 800th line is rewritten.

In this way, monitor display and printing can be performed efficiently with the minimum memory capacity.

〔Effect of the invention〕

As described above, according to the present invention, the image signal after decoding is stored in memory, and the information can be checked on the monitor screen, so that only the truly necessary information in the broadcast facsimile program can be displayed. This has the effect of making it possible to select and efficiently make hard copies, and to eliminate waste of recording paper.

[Brief explanation of the drawing]

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 structure of the memory area of the memory section in FIG. 1, and FIG. Figure 4 is a diagram explaining the time-series operation of the photocopying unit, Figure 4 is a diagram showing the structure of a facsimile signal, Figure 5 is a spectrum diagram in which the facsimile signal is frequency multiplexed with the audio signal, and Figure 6 is a conventional facsimile broadcast receiver. FIG. In the figure, 1 is an antenna, 2 is a tuner section, 3 is a demodulation section, 4 is an image signal decoding section, 5 is a system control section, 6 is a memory section, 7 is a video interface section, and 8 is a printing section. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A tuner unit that receives a facsimile broadcast in which a facsimile signal is multiplexed and transmitted on the audio second subcarrier of a television signal, and a demodulator unit that separates and demodulates a facsimile channel signal from the audio detection output of the tuner unit. , a facsimile broadcast receiving apparatus comprising: an image signal decoding section that separates and decodes an image signal from the facsimile signal demodulated by the demodulation section; and a printing section that prints the decoded image signal on recording paper; It is equipped with a memory section for storing subsequent image signals, and a video interface section for displaying the decoded image signal stored in the memory section on a display monitor screen, and transmits the image signal to the printing section. A facsimile broadcast receiving apparatus characterized in that the facsimile broadcast receiving apparatus is configured to perform transmission through the memory section.