JP2965114B2 - Teletext receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for receiving subtitle programs sequentially based on each data stored in a reservation memory,
The present invention relates to a teletext receiver that outputs the video signal.

[0002]

2. Description of the Related Art FIG. 4 is a schematic block diagram of a teletext receiver. In the figure, a TV signal on which a character signal is superimposed is input to a tuner 1 and then amplified by a video amplifier 2, and the TV video signal passes through a switching mixer 5 and a picture tube 46.
And the character signal is separated from the television signal and supplied to the character signal processing unit 3. On the other hand, in order to select a desired teletext program, a teletext program number is input from the key input section 42, and the program number is stored in the program number memory 41. The character signal processing unit 3 processes character data corresponding to the selected program, converts the data into character / graphic data, and stores it in the display memory 4. The display memory unit 4 operates while synchronizing with the television signal, and the character / graphic data (video signal) read therefrom is switched or mixed with the television video signal by the switching / mixing unit 5. It is supplied to a picture tube 46. By the way, as a service for people with hearing impairments in teletext, superimpose the words, narration and summary of the program contents of the TV program on the TV program using characters and figures,
There is a so-called subtitle program, which is a very useful means for deaf people to understand television programs. However, nowadays, even news, for example, does not mean that there are many subtitle programs, so people with hearing impairments need to check the subtitle programs and broadcast time in newspapers and watch TV. It was necessary to always pay attention to the start time, and there was a problem of overlooking the desired program. Also, in the operation for watching television, after selecting a television channel by key input, it is necessary to press a number (for example, 999) corresponding to a subtitle program and a predetermined key (for example, #). It takes time and effort to select a subtitle program, and there is a problem for the user. Furthermore, the conventional teletext receiver does not have a reservation function for recording a desired subtitle program on a VTR.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. Therefore, a subtitle program is automatically received and displayed on a picture tube without special reservation operation.
And, or, and an object thereof is to provide a text broadcast receiver which outputs the video signal to VTR.

[0004]

In order to achieve the above object, a character signal is separated from a demodulated video signal, an error correction is performed by a character signal processing unit, and then the character broadcast data is decoded. In a teletext receiver for writing pattern data and graphic data read from a display memory to a display memory, converting the video data into a video signal and displaying the video signal on a picture tube, a subtitle detecting that the teletext program is a subtitle program based on the teletext program data A determining unit, a clock unit having a clock and a calendar function, a day of the week data determining unit for determining broadcast day data on which a subtitle program is broadcast, a broadcast time determining unit for determining a broadcast start time and an end time, A reservation memory for storing each data of the TV channel number data in which the subtitle program exists, the day of the broadcast, and the start time and end time of the subtitle program; Na a tuner switch unit for generating a channel switching signal to the channel number memory reserved TV channels, and a control unit that controls each unit.

[0005]

With the above arrangement, the caption judging unit checks the program number data and the program form data of the program data while switching the tuner based on the data stored in the channel number memory, and determines the subtitle program of each TV channel. Determine existence. The day-of-week data determination unit determines the broadcast day of the week based on the data for a predetermined period and the clock data,
Generate day of the week data. Further, the broadcast time determination unit determines the broadcast time with a corresponding accuracy based on the required all-channel switching cycle and clock data. The reservation memory stores each data of the determined television channel, the determined broadcast day and the broadcast time. Based on the contents of the reservation memory,
A desired subtitle program is received, and its video signal is
Output to TR.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A teletext receiver according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a teletext receiver according to the present invention. The same parts as those in FIG. 4 are assigned the same reference numerals and explanations thereof will be omitted. Reference numeral 6 denotes a timer for measuring the passage of time. Reference numeral 7 denotes a caption determination unit that detects that the text broadcast program is a caption program based on the text broadcast program data. Reference numeral 8 denotes a clock unit having a clock and a calendar function. Reference numeral 9 denotes a channel number memory for reserving a television channel. Reference numeral 10 denotes a day-of-the-week data determining unit that determines a broadcast day of the week based on data for two weeks and generates day-of-week data. Reference numeral 11 denotes a reservation memory for storing data of the determined television channel, the determined broadcast day of the week, and the broadcast time. Reference numeral 12 denotes a broadcast time determining unit that determines a broadcast time with a corresponding accuracy based on a required all-channel switching cycle. A control code generator 13 generates and outputs a control code of a VTR to be connected based on the contents of the reserved memory. Reference numeral 14 denotes a tuner switching unit that generates a channel switching signal for the tuner. A control unit 15 controls each unit.

The operation of the teletext receiver according to the present invention will be described. As shown in FIG. 2, based on the TV channel data in the channel number memory 9, the tuner switching unit 14 measures the time of the timer 6, for example, 1 ch, 3 ch,... Then, the tuner 1 is switched. At this time, for example, when the program number is “999” and the program form data is “3”, the subtitle determination unit 7 determines that the received text program is a subtitle program, Figure 2
As shown in the time chart, a subtitle program of 1ch is detected at time a. 1 detected at time b since time a
When a subtitle program for channel ch is started, it cannot be detected. Similarly,
At time c, a subtitle program of 10 ch is detected. At time d, a subtitle program of 10 ch detected since time c is started and cannot be detected. Similarly, at time e, a subtitle program of 4ch is detected. At time f, a 4ch subtitle program that has been detected since time e starts and cannot be detected. As described above, the broadcast time determination unit determines the start time and the end time of the subtitle program. The day-of-the-week data determination unit 10 stores broadcast day data based on calendar data of the clock 8, and determines, for example, whether a broadcast day is broadcast every week based on data for two weeks. If the reception time of each channel is set to about 25 seconds (the transmission interval of the text program is longer than 20 seconds on average), the detection time of all channels is 3.3 minutes, and the broadcast time is determined. Practical accuracy can be ensured.

As shown in FIG. 3, the reserved memory is composed of memory blocks 1 to m. Each memory block includes a channel (ch) of a subtitle program, its broadcast day, start time and end time data. It is memorized.
Also, as shown in the data example of (b), the data of the broadcast day is allocated to bits of weekly broadcast, Monday broadcast,..., Sunday broadcast in order from bit 7 to bit 0, for example, weekly (bit 7 ) To Sunday broadcast (bit
1 is set to all the flags of 0), and the data of the broadcast days for two weeks is totaled. If the flag is 1 only for weekly (bit 7) and Monday broadcast (bit 6), the broadcast of every Monday is performed. If the flag is 1 in each bit from Monday to Friday, it indicates a broadcast day on weekdays, and the flag data is stored. It should be noted that, based on the storage (flag) data in the reservation memory, a subtitle program at a predetermined time is received and its video signal is output to a connected VTR. Alternatively, both the video signal and the control signal may be supplied to the VTR.

[0009]

As described above, according to the present invention, a subtitle program is automatically received and transmitted to a picture tube without special reservation operation.
A teletext receiver for displaying or outputting the video signal to a VTR is provided. Therefore, there is a merit that deaf people do not overlook a subtitle program and can record it on a VTR and watch it at any time.

[Brief description of the drawings]

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

FIG. 2 is a time chart for determining a broadcast time of a subtitle program by switching a television channel of a teletext receiver according to the present invention.

FIG. 3 is a schematic configuration diagram of a reservation memory of the teletext receiver according to the present invention.

FIG. 4 is a schematic block diagram of a conventional teletext receiver.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tuner 2 video amplifying unit 3 character signal processing unit 4 display memory unit 5 switching mixing unit 6 timer 7 subtitle determination unit 8 clock unit 9 channel number memory 10 day of week data determination unit 11 reservation memory 12 broadcast time determination unit 13 control code generation unit 14 Tuner switching unit 15 Control unit 41 Program number memory 42 Key input unit 46 Picture tube

Claims (3)

(57) [Claims] 1. A character signal is separated from a demodulated video signal, an error correction is performed by a character signal processing unit, the character broadcast data is decoded, and pattern data and graphic data read from a character generator are stored in a display memory. In a teletext receiver for writing, converting to a video signal and displaying on a receiver, a subtitle determination unit for detecting that the teletext program is a subtitle program based on teletext program data, and a clock unit having a clock and a calendar function And the character detected by the subtitle determination unit
And day of the week data determination unit to determine the broadcast day of the week data subtitles program is broadcast from the calendar function of curtain program and watch parts, character
A broadcast time determining unit that determines the broadcast start time and end time based on the subtitle program detected by the subtitle determination unit and the clock of the clock unit, a subtitle determination unit, a day of the week data determination unit, and a broadcast time determination
TV channel number data subtitle program that is broadcast is present to confirm in part, of the broadcast day of the week, and the reserved memory for storing each data of the start time and end time of the subtitle program, character
Reserve a TV channel for which you want to receive a curtain program
Channel number memory and channel number memory and
According to the TV channel number data from the reservation memory,
A channel switching signal to the tuner
From the tuner switching unit and the control unit that controls these units
The channel number memory and the reservation memory
To the channel of the desired subtitle program based on the stored data of
Switch to receive teletext, convert to video signal and output
Character broadcast receiver, characterized in that that. 2. The character broadcast receiver according to claim 1, wherein the broadcast day is stored for each subtitle program by whether the reservation memory sets a flag in a memory bit corresponding to the broadcast day of the subtitle program. 3. The teletext receiver according to claim 1, further comprising: a control signal generation unit that generates and outputs a control signal of a VTR connected at a time based on the contents of the reservation memory.