JPH0257060A - Facsimile broadcast receiver - Google Patents

Abstract

PURPOSE:To devise the receiver such that required information is received in advance and printed out at an optional time by providing a removable memory storing facsimile information. CONSTITUTION:A facsimile broadcast received from an antenna is received and subject to channel selection by a television tuner 1. Then a facsimile signal is demodulated at a facsimile demodulation circuit (QPSK demodulation circuit) 4 via a voice detection circuit 2 and a band pass filter circuit 3 whose center frequency is 4.5fH and a data is fetched. Then the data is given to a signal processing circuit 5, where the data is subject to decoding processing and a picture data and a control data are obtained. The signal is given to a printer 6, from which a picture is printed out. Moreover, the same picture as the picture printed out is displayed on a CRT 7. A connector 8 is provided to the facsimile broadcast equipment and an IC card 9 being an external memory is connected removably to the connector 8.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a device for receiving facsimile broadcasts.

[Conventional technology]

Facsimile broadcasting is a broadcasting that transmits screen signals for printing, and is available in analog and digital formats. The analog system multiplexes and broadcasts between TV audio channels, but the transmission bandwidth is wide, making it difficult to prevent interference with TV audio multiplex broadcasts. On the other hand, in the digital system, a subcarrier is set up outside the band of TV audio broadcasting, and this is subjected to differential four-phase sum modulation using a facsimile/two-dimensional compression-encoded signal. DQPsK (Diff
erntial Quadrature Phas
e5hift, Keying) This is a method that adopts the FM method, and is considered to be a promising method for adoption because it can narrow the transmission bandwidth and realize stable printing.

FIG. 3 is a diagram showing the audio signal band of this digital method, and the digital facsimile signal is 4.5fH (f++:
(horizontal synchronization frequency/pulse frequency) is used as a subcarrier.

FIG. 4 is a diagram showing the data structure of this facsimile broadcast signal. The data structure is similar to that of teletext. First, there is a horizontal synchronization signal of 8 clock length, followed by a front 1-porch of 6 clock length, and then a clock run-in (CRT) as a 64-bit synchronization signal, 16b.
Framing code (FRC) for frame synchronization of IT
, 14-bit data identification prefix (PF
X), followed by 160 bits of data (DATA
), followed by a 16-bit error detection code (CRC).
), 82-bit error correction code (CHC)
, followed by an 8 clock length hack pouch. and,
PRX, DATA, CRC, and CHC are called data buckets.

In facsimile broadcasting, this data bucket is decoded and separated into image data and control data, and an image is formed using a printer.

[Problem to be solved by the invention]

However, with this facsimile broadcast, it takes about 30 seconds to 2 minutes to receive each page, and since a lot of information is sent out in sequence, you can receive it quickly by selecting the program you want to receive with a button. It's not a thing.

The present invention has been developed in view of these points, and its purpose is to receive necessary information in advance so that it can be printed out at any time.

[Inventive Impulse 1'' Problem to be Solved] For this purpose, the present invention provides a television tuner, an audio detection unit that detects an audio signal from the tuner, and a facsimile machine that demodulates the facsimile broadcast signal obtained by the audio detection unit. In a facsimile broadcast receiving apparatus comprising a demodulation section, a signal processing section that processes the signal obtained by the demodulation section, and a printer that performs printing 1 to 1 based on the image signal from the processing section, The machine is equipped with a removable memory for storing the received facsimile information.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a block diagram of a facsimile broadcast receiving apparatus according to one embodiment. The facsimile broadcast received from the antenna is received and a channel is selected by the television tuner 1. The facsimile signal is then demodulated by a facsimile demodulation circuit (QPSK demodulation circuit) 4 via an audio detection circuit 2 and a bandpass filter circuit 3 with a center frequency of 4.5 fH, and the data shown in FIG. 4 is extracted. It will be done. and,
These data are input to the signal processing circuit 5, where they are decoded and processed to obtain image data and control data. This signal is output to the printer 6 and the images are printed images U1~
be done. Note that the same image as the print image can also be displayed on the CRT 7.

In this embodiment, such a facsimile broadcasting device is provided with a connector 8 to which an IC as an external memory is connected.
The card 9 can be removably loaded.

FIG. 2 is a diagram showing the inside of the signal processing circuit 5. As shown in FIG.

A CPU 11 controls the entire system, and executes processing according to a program stored in a program R0M 12 in response to operation signals from an operation section (not shown). The data and clock from the demodulation circuit 4 are stored in the data RAM] 4 via the error correction circuit 13, and then the CRTC section (
CRT controller I/roll section) 15 to the printer 6.
It is output to the CRT7. At this time, if the image is to be displayed on the CRT 7, it is temporarily stored in the video RAM 16. The connector 8 mentioned above is a serial or parallel ink-face 1.
7. 18 is a work RAM.

From the above, by specifying one or more specific pages of a specific program of facsimile broadcasting in advance,
By writing the page to the printer 1-i', the page of the program can be displayed afterwards on the printer 6 or on the CRT 7 without having to wait for a certain amount of time. Also, since data can be saved, you can check the saved data on the CRT7 and search for only what you need.
You can then print it out.

As mentioned above, since the data processing of this facsimile broadcast is similar to that of teletext broadcasting, it can be used for both purposes by partially improving the receiving section of teletext broadcasting.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to store the contents of facsimile broadcasts in a removable memory, which has the advantage of eliminating the need for waiting time for printing them out, and also allows data to be stored without being printed. Since there are some saved data, it is also possible to search among the saved data and print out only what is necessary.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a facsimile broadcast receiving apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of a signal processing section,
FIG. 3 is an explanatory diagram of the transmission of a digital facsimile broadcast signal, and FIG. 4 is an explanatory diagram of the data structure of the digital facsimile broadcast. Agent Patent Attorney Tsuneaki Nagao

Claims (2)

[Claims] (1) A television tuner, an audio detection unit that detects an audio signal from the tuner, a facsimile demodulation unit that demodulates the facsimile broadcast signal obtained by the audio detection unit, and a signal that processes the signal obtained by the demodulation unit. A facsimile broadcast receiving device comprising a processing section and a printer that prints based on image signals from the processing section, characterized by comprising a removable memory for storing facsimile information obtained by the signal processing section. A facsimile broadcast receiving device. (2) The facsimile broadcast receiving apparatus according to claim 1, wherein the memory is an IC card.