JP2745578B2 - Teletext receiver - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a teletext (teletext) receiver.

Conventional technology In teletext, programs with the same program number every 20-30 seconds,
It is broadcast repeatedly. Further, one program is mostly composed of a plurality of pages (usually eight pages). Therefore, in order to watch all programs of eight pages, it takes about three minutes.

Hereinafter, a conventional teletext receiver will be described with reference to FIG.

A detection unit 1 detects a television signal from an antenna input and converts the television signal into a video signal or the like.

2 is to extract luminance signal and chrominance signal from video signal and RGB
A demodulation unit that converts the signal into a signal.

Reference numeral 3 denotes a teletext receiving unit that extracts a teletext signal from the video signal from the detection unit, further extracts and stores arbitrary teletext program data, performs a presentation process, and outputs the RGB signal.

Reference numeral 4 denotes a signal combining unit that combines signals such as an RGB signal from the demodulation unit 2 and an RGB signal from the teletext receiving unit 3.

Reference numeral 5 denotes a display for displaying a signal from the signal synthesizing unit 4.

Reference numeral 6 denotes a key input processing unit that requests the detection unit 1, the demodulation unit 2, the teletext receiving unit 3, and the signal synthesis unit 4 to perform a processing request according to the key input.

 Next, the operation will be described.

In the teletext receiver of FIG. 3, when the main power is on, the power supply system 1 (power supply line is not shown) is always energized, and the power supply system 2 (power supply line is (Not shown), energization is controlled. After the power supply system 2 is energized, the teletext receiver 3 extracts the teletext signal from the video signal from the detector 1 and selects a teletext program. Further, a key having a number registered in advance by a key input from the key input processing unit 6 is retrieved or a selected program is fetched and displayed. The display-processed data is written into a display memory inside the teletext receiver 3, read out by the signal synthesizer 4, and displayed on the display 5. When performing superimpose display,
The signal from the demodulation unit 2 and the signal from the teletext receiving unit 3 are combined by the signal combining unit 4, and when a television broadcast is used, only the signal from the demodulation unit 2 is processed by the signal combining unit 4 and displayed on the display 5. .

In the conventional teletext receiver, when the power is turned off (when the television screen is not displayed), the teletext receiver does not operate at all, and the contents of all pages of the arbitrary program are displayed. In order to see, after the power is turned on, it is necessary to wait until all the pages are transmitted. The longer the number of pages, the longer the time, and there is a problem in that the text broadcasting is inconvenient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and aims to provide a teletext receiver capable of immediately reading and displaying a reserved program when the power is turned off and turned on again.

Means for Solving the Problems The present invention provides a switch for turning on / off the power of all circuits, a key input processing unit, a detection unit, a demodulation unit, a teletext receiving unit, and the like. It has a switch for turning on / off the power supplied to the circuit block, means for causing the teletext receiving circuit unit to recognize the energization state of the display system, and means for changing the channel from the teletext receiving unit.

According to the present invention, even when the display system is not energized, the character broadcast reception /
If the storage process is performed and there is no program reservation registration, the teletext signal is stored at an arbitrary time period, and if there is a program reservation registration,
If all pages of a registered program or a setting page is stored, and there is program registration across multiple channels,
The channels are switched in an arbitrary order, and all pages of the reservation registration program or the setting page is stored for each channel.

When the power is turned on by a remote controller or the like and displayed on the display, the stored contents can be immediately recalled and displayed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a teletext receiver according to an embodiment of the present invention.

In FIG. 1, components having the same numbers as those of the conventional example shown in FIG. 3 have the same functions, and a detailed description thereof will be omitted.

Reference numeral 10 denotes a key input processing unit which has a bidirectional input / output unit in addition to the function of the key input processing unit 6 of the conventional example.

Numeral 11 denotes a teletext receiving unit, in addition to the function of the teletext receiving unit 3 of the conventional example, a function of requesting key processing to the key input processing unit 10, a function of determining the energization state of the display system, and a program search by energization state. , Has a function of changing the accumulation process.

Reference numeral 12 denotes a display status register that indicates the energization state of the display system.

In the teletext receiver of FIG. 1, when the main power is on, a power supply system A (power supply line is not shown) is always in an energized state, and a power supply system B (power supply line is (Not shown).

 Hereinafter, the operation of the present invention will be described.

When both the power supply system A and the power supply system B are energized, the key input processing in the key input processing unit 10 enables the use of a television broadcast, a text broadcast, or a television broadcast of superimposed display interpolation of a text broadcast program. When a text broadcast is selected by the key input processing unit 10 and an arbitrary program on an arbitrary channel is reserved in the reservation mode, a screen as shown in FIG.

In FIG. 2, FNo. Is a function number, and CH indicates a channel program. The program number is indicated by magazine number / program number * page number. The memo is an input of items for making the contents of the program easy to understand. When an arbitrary program is pre-registered by the key input processing unit 10, the channel, magazine, program, and page numbers are registered for an arbitrary FNo. Usually, the magazine number is 0,
The page is 00 when all pages are shown. In particular, when a page number other than 00 is designated, 01 to 99 is specified.

When the power supply system B is energized, the program contents of the text broadcast reservation program of the currently set channel are stored and stored, regardless of whether the text broadcast display or the television broadcast display is performed, and further measures for waiting time. The transmission data is also sequentially accumulated in the buffer for transmission.

When the power is turned off by key operation, the key input processing unit
Reference numeral 10 denotes a power supply system B which is turned off and a teletext receiver 11
Send the power off code to. The teletext receiving unit 11 stores the status of the power supply system B off in the display status register 12.

When the power supply system B is off, the teletext receiving unit 11 sets the reserved program of the currently set channel (for example, 2CH) to all programs,
All pages (only designated pages when pages are designated) are stored. Next, the teletext receiving unit 11 issues a channel change request (for example, a request to change to 4CH) to the key input processing unit 10 according to the contents of the reservation table in an arbitrary order. Key input processing unit 1
“0” changes the channel of the detector 1. When the channel is changed, the teletext receiving unit 11 searches and stores a reserved program for 4CH teletext based on the reservation table. In this case, only the latest page of each program is stored. However, for a batch program, all pages are stored. When the accumulation of the 4CH reserved program is completed, the teletext receiving unit 11 determines that the display system is off by the display status register 12, and issues a channel change request to the key input processing unit 10. Thereafter, the same processing is performed, and the reserved programs are stored based on the method indicated by channel 4 for channels 6, 8, 10, 19, and 7 and the channels set in the reservation table. After one cycle, the same processing is repeated from the setting when the power supply system B is off. When the power key is pressed during the processing of an arbitrary channel, the key input processing unit 10 immediately sets the channel of the last channel (the channel set when the power system B was turned off). The teletext receiving unit 11 immediately starts the default processing. Note that all the completed reserved programs stored during this period are valid, and when the power supply system B is turned off, the text broadcast signal of the last channel that has not been completely stored during the storage is continuously stored.

Note that it is also possible to accumulate all pages of all programs for channels other than the last channel by mode setting.

Effects of the Invention According to the present invention, the power supply system of the display display system and the teletext receiving system are separated from each other, the power system of the display display system is turned off, and the power system of the teletext receiving system is displayed even when the display is not displayed. Is held in the energized state, so that the teletext signal can be received and stored, and by setting the channel from the teletext receiving unit, the teletext signal can be received and stored over a plurality of channels.

When the power supply of the display system is turned off, starting from the last channel, arbitrary pages of all the programs registered for reservation are sequentially stored, so that even when the storage of the teletext signal in the last channel is not completed, the operation is continued. Since the character broadcast signal being stored is lost, the inconvenience that the character broadcast signal must be stored again from the beginning does not occur, and the character broadcast signal can be received and stored efficiently.

When the power of the display display system is turned on, the display starts from the last channel. However, when the power is turned off as described above, the data is stored from the last channel text broadcast signal. Has already been completed and is ready to be read and displayed immediately.

For this reason, it is possible to obtain an extremely excellent effect that a reserved program of a text broadcast can be read out and displayed immediately after power-on for display.

[Brief description of the drawings]

FIG. 1 is a block diagram of a teletext receiver according to an embodiment of the present invention, FIG. 2 is a front view of a display example of a reservation screen in the embodiment, and FIG. 3 is a block diagram of a teletext receiver of a conventional example. It is. 1 ... Detection section, 2 ... Demodulation section, 4 ... Signal synthesis section, 5 ...
... Display, 10 ... Key input processing unit, 11 ... Text broadcast receiving unit, 12 ... Display status register.

Claims (1)

(57) [Claims] A detector for detecting a television signal from an antenna input and converting the television signal into a video signal; extracting a luminance signal and a chrominance signal from the video signal;
A demodulation unit for converting to a B signal; a text broadcast for extracting a text broadcast signal from the video signal from the detection unit, extracting and storing arbitrary text broadcast program data, further performing a presentation process, and outputting as a second RGB signal A receiving unit, a signal combining unit that combines the first RGB signal from the demodulating unit and the second RGB signal from the teletext receiving unit, and display means for displaying a signal from the signal combining unit. A key input processing unit having a bidirectional input / output unit for performing a processing request according to a key input to the detection unit, the demodulation unit, the teletext receiving unit, and the signal synthesizing unit; A first power switch for performing power supply, and when the first power switch is turned on, power is supplied through a second switch to supply power to a display system including the demodulation unit, the signal synthesis unit, and the display unit. First
And a power supply means for supplying power to a teletext receiving system including the detection unit, the teletext receiving unit and the key input processing unit, and the second power source is always kept energized when the first power switch is turned on. Power supply means, key processing request means for making a key processing request to a key input processing unit, and changing means for changing a program search and / or storage process depending on an energized state; When the second switch is turned off by the control signal, the first power supply means is turned off, the second power supply means is kept on, and the teletext receiving system is turned on. Power to the key processing requesting means and the changing means to maintain the operating state, accumulate a pre-registered text broadcast program of the channel being set, and The key input processing unit controls the detection unit to change the channel in response to a key processing request for changing the channel from the processing request unit, and changes the program search and / or accumulation process in the changed channel by the changing unit. In addition, the teletext program registered in advance in advance is started from the last channel with reference to the last channel set when the first power supply means is turned off. All the pages or specific pages of all the programmed programs are stored, and after the storage is completed, the channels are changed to the channels registered and reserved in an arbitrary order. ) Is accumulated, and after the accumulation is completed, the process returns to the last channel, and the same processing is repeated. Character broadcast receiver.