JPS60144086A - Character broadcast receiver - Google Patents

Abstract

PURPOSE:To display clearly all visible an audible character broadcast programs by applying display to any viewer immediately completely if a character broadcast program desired for viewing is not broadcast and displaying the presence of the character broadcast and retrieval information of all the character broadcast program under broadcast together. CONSTITUTION:A comparison section 13C compares a program number of a command program, page number and retrieval information stored in a retrieval memory 21. The comparison section 13C supplies a desired program presence signal to an operation processing section 13D and a program forming section 13E when the retrieved information has information coincident with the command program number and the page number. Then the content of the obtained command program is supplied to a character information signal output section 13F as a program signal and displays it on a CRT 6. When the retrieval information and the command program dissident, the comparison section 13C supplies a desired program absence signal to the operation processing section 13D, which reads a character signal (not broadcast) from the retrieval memory 21, and supplies it to a character information signal output section 13F as the program information signal and this character is displayed on the CRT 6.

Description

[Detailed Description of the Invention] [Technical Field] The present invention utilizes the vertical blanking period of a television video signal to receive character signals transmitted in data packets whose unit length is the horizontal scanning period. The present invention relates to a teletext receiver for teletext broadcasting, and in particular to displaying the presence or absence of teletext broadcasting and searching for teletext programs.

<Prior Art> Even if a teletext receiver is operated to receive a teletext program that the user desires to view, the desired program may not be broadcast. However, in this case, no matter how long you wait, the receiver's C
The desired program is not displayed on RT, and nothing is displayed regarding whether or not the desired program is being broadcast. Even if the desired program is being broadcast, there is a certain amount of waiting time before the program is actually displayed on the CRT, so it may not be immediately obvious that the desired program is not being broadcast. You have to wait a long time before you notice it.

To solve this problem, some teletext receivers are designed to notify the user, for example, by blinking the program number of the desired teletext program if it is not being broadcast. This means that the group number of the teletext broadcast that was received is
This system searches to see if it is included in the program number of all teletext programs currently being received, and displays the above information based on the search results. You can avoid wasting time by waiting.

However, the display method for this differs depending on each teletext receiver and is not standardized, so some viewers may not be able to understand the meaning of this display (there may be problems such as the display not being used effectively). Also, if you find out that the teletext program you originally requested is not being broadcast, and you wish to watch another program instead, you may not be able to see what other teletext programs are being broadcast. It was inconvenient for me to decide on programs because I didn't know what was going on.

<Purpose> The present invention has been made in view of such problems, and is intended to enable any viewer to immediately and completely know when a desired teletext program is not being broadcast. In addition to displaying the information, it also displays the presence or absence of teletext programs and search information for all teletext programs being broadcast, so that instead of this, it is possible to see all teletext programs that are available for viewing. shall be.

<Example> The present invention will be described in detail below based on an example shown in the drawings. FIG. 1 is a block diagram of a teletext receiver according to an embodiment of the present invention. In FIG. 1, reference numeral A is the teletext receiver of this embodiment, and B is the television signal receiving section of this receiver mA. This television signal receiving section B includes a television signal receiving antenna 1, a television signal human power section 2 that amplifies the television signal inputted through this antenna 1, detects it, and outputs it, and this input section. 2
It has a television signal processing section 3 that applies normal television signal processing to the output television signal. C is a display section. This display section C is connected to a switching circuit VRS 4 for switching and outputting a television signal outputted from the television signal processing section 3 and a character information format from a decoder section to be described later, and via this switching circuit 4. The output circuit 5 includes a CRT 6 and an output circuit 5 for outputting a television signal or a text F6 information signal to a CRT. D is a decoder section that processes character signals. This decoder section includes a character signal extraction circuit 11 which extracts the television signal output from the television signal human power section 2 of the television signal receiving section A and outputs it in the form of a serial signal.
A, a parallel conversion circuit 1f that converts the character signal output from this circuit 11A into a parallel signal state, and a character signal receiving section 11 that is composed of B, and a character signal output from this parallel conversion circuit 11B, a buffer memory I2, which will be described in detail later, and a CPU 13, which will be described in detail later.
A display memory 14 that once stores the character information signal output from this CPU 13;
j, a! 1 (After applying level adjustment timing processing to the Go1Rokuwaruji1n notification signal, the above-mentioned display section C
It has a character information signal supply circuit 15 for supplying the character information signal to the switching circuit 4 of the buffer and the display memo 912,1.
4 address control unit 16 and this address control unit 1
6 and the synchronization side (goods) of the above-mentioned parallel conversion circuit 11B
It also has a section 17. Moreover, this display memory 14 is
It includes a color memo 1J14A and a pattern memo 1J14B built into the same chip as the buffer memory 12.

The difference between the color and pattern memories 14A and 14B will be explained in the operation section.

Further, a pass line (BUS) is directly connected to the CPU 13, and the above-mentioned address control unit 16, buffer, display unit memory 12,
14 is connected to the CPo 13, as well as an operation unit 18 for inputting commands to the CPU 13, a teletext display device 19, a multi-memory 20 for storing teletext programs for eight screens in this embodiment, and a CRT. R to remember the display characters for
A search memory 21 constituted by the OM and a RAM for storing search information, which will be described later, is also connected, and each of these sections is included in the decoder section. Further, a command signal is input to the operation section 18 by operating a remote control device 22, and this device 22 is also included in the decoder section.

Further, this CPU 13 receives the output signal from the character signal receiving section 11 through the buffer memory 22.
For example, a detection unit 13A that monitors the value of a portion corresponding to the SI/IN portion of a text signal given during teletext broadcasting and detects the presence or absence of teletext broadcast according to this value;
a search unit 1313 for extracting program numbers and other search information of all text broadcast programs included in the text signal and storing it in the search memory 21 in response to a detection signal indicating the presence of a text signal output from the search unit 1313; It has a comparison section 13C that compares the search information stored in the CP with the teletext program that is commanded to be received by a command signal input from the remote control device 22 through the operation section 2.
The U 13 further responds to the no applicable program signal from the core unit 13C based on the comparison result in the comparison unit 13c,
In addition to reading the display characters stored in the ROM of the search memory 21 and the search information and outputting them as program information signals for CRT display, it also controls not only each part of the CPU 13 but also the entire teletext reception mA. In response to a signal from the corresponding program from the comparison unit 13B, the arithmetic processing unit 1.3D performs normal character information processing on the character signal read from the buffer memory 12, and generates program content for CRT display. a program forming unit BE that forms a program signal including a program forming unit BE;
3E respectively, and a character information signal output section 13F which performs signal processing on the program signal for display on the CRT 6, outputs it as a character information signal, and supplies it to the display memory 14. There is.

In the teletext receiver A having the configuration described above, during the teletext receiving operation, the following information is input from the receiving antenna 1,
A character signal is extracted from the television signal provided via the television signal input section 2 by the character signal extraction circuit 11A. The extracted character signal is output as a serial signal from this extraction circuit A, and after being converted into a parallel signal in the parallel conversion circuit 11B,
Stored in buffer memory 12. The CPU 13 performs character information processing, which will be described in detail later, based on a command signal input via the operation unit 18, and outputs a character information signal based on the result. Further, when a character signal is input, search information for a teletext program being broadcast is stored in the search memory 21, and the presence/absence display device 19 is caused to display the presence of teletext broadcasting. At this time, the character information signal is
The shape component for CRT 6 display and the color component are output from the CPU 13 separately, and the shape component of the signal is stored in the pattern memory 14A, and then output as a parallel signal and sent to the serial conversion circuit 23. The signal is converted into a serial signal state and provided to the character signal output circuit 14. On the other hand, after the color component is output from the CPU 13, it is given to the character signal supply circuit 15 via the color memo 1714B, and the character signal supply circuit 15 outputs character information of both this component and the shape component. The signals are recombined into one textual information signal. The text information signals combined into one signal are applied to the CRT 6 via the switching circuit 4 and the output circuit 5 of the display section C, and the contents of the 1-hour information contained therein are displayed.

During this series of operations, the address control section 6 controls the addresses of the buffer memory 12 and the element memory 14.
Furthermore, the synchronization control section 17 controls the address control section 16.
The parallel conversion circuit 11B is synchronously controlled.

Next, character information processing performed by each section of the CPU 13 in response to a command signal applied via the operation section 18 will be described with reference to flowchart 1 shown in FIG.

First, a command signal given via the operation unit 16 instructs the reception of a teletext program. The arithmetic processing unit 13D converts the program number and page number of the program commanded by this signal (hereinafter referred to as commanded program) into a program information signal that is displayed as, for example, "15 programs 1 page" and sends it to the text information signal output unit 13F. give.

The character information signal output section 13F converts the given signal into a character information signal and provides it to the display memo I) work A. Therefore, this character is displayed on the CRT 6 [step 1].

Next, the comparison unit 14C compares the program number and page number of this command program with the aforementioned search information stored in the search memory 21 [Step 2].

The comparison unit 13C determines YES if there is anything in this search information that matches the command program number and page number,
The corresponding program presence signal is processed by the arithmetic processing unit 13D and the program forming unit 13.
Give to E. In response to this corresponding program presence signal, the arithmetic processing section 13D reads out the character signal "Please wait" from the search memory 21, converts it into a program information signal, and supplies it to the character information output section 13F. Therefore, on the CRT 6, this "Please wait" and the aforementioned "15 programs 1 page" are shown in Figure 3 (
It is displayed as shown in a) [Step 3]. The program forming section 13E also starts reading out the character signal stored in the buffer memory 12E in response to the corresponding program presence signal, and performs normal character information processing on this signal. and,
The obtained contents of the command program are given to the character information signal output section 13F as a program signal. Therefore, the content of this program is C.
Displayed on RT 6 [Step 4].

In step 2 described above, if the search information and the commanded program do not match, the comparing section 13C makes a negative determination, gives a corresponding program no signal to the arithmetic processing section 13D, and proceeds to step 5. In step 5, in response to this signal that there is no corresponding bill set, the arithmetic processing section 13D reads out a character signal "1 has not been sent" from the search memory 21 and provides it to the character information signal output section 13F as a program information signal. . Therefore, Fig. 3 (
This character is displayed on the CRT 6 as shown in bl.

Next, the process proceeds to step 6, and the detection unit 13A detects the presence or absence of teletext.

When the detection unit 13A outputs a detection signal indicating no teletext broadcast, since no teletext broadcast is being performed, the arithmetic processing unit 13A
3D determines NO and ends the character information processing. Therefore, at this time, the display screen of the CRT 6 remains as shown in FIG. 3(b). At this time, a normal television broadcast screen may be displayed superimposed on the display of FIG. 3(b). When the detection unit 13A outputs a teletext cargo detection signal, the arithmetic processing unit 13D determines Y in step 6.
It is determined as ES and the process proceeds to step 7. In other words, in this case,
Although the above-mentioned command program is not being broadcast, teletext broadcasts of other programs are being carried out. Then, in step 7, the character signal "1 program guide" is read out from the search information memory 21 and outputted as a program information signal. Next, the process proceeds to step 8, where the arithmetic processing unit 13D performs the search memo 1J.
The search information is read out from 21 and the contents are given to the character information signal output section 13F.

These “Not Sent” and “Program Guide” search information given to the character information signal output unit 13F and the above-mentioned “15
All the program information signals of "Program 1 page" are sent to the corresponding output section 1.
It is output as a character information signal from the 3rd floor, and the third
The screen is displayed as shown in Figure (C).

In other words, if a command program is being broadcast, CR'l'6
After the display shown in Figure 3 (a) is displayed, the content of the commanded program is displayed, and if teletext is not being broadcast, the display shown in Figure 3 (a) is displayed.
b) will be displayed. In addition, if teletext is being broadcast but the command program is not being broadcast, the screen shown in Figure 3 fc) containing search information will be displayed. A teletext program that can be viewed instead of the commanded program can be known from the display screen.

<Effects> As described above, the present invention includes a detection unit that detects the presence or absence of a character signal based on data included in the output of the character signal reception unit, and a detection unit that detects the presence of a character signal output from the detection unit. Inclusion of character signals in response to signals.

A search unit that extracts the program number and other search information of all teletext programs, a search memory that stores the characters displayed on the CRT and the search information from the search unit, and a search unit that stores the search information and the operation unit. a comparison unit that compares a teletext program that is commanded to be received in response to an input command signal; and a comparison unit that responds to a non-applicable signal from the comparison unit and reads display characters and search information stored in the search memory. , and an arithmetic processing unit that feeds the CRT, the viewer can tell from the characters displayed on the CRT whether or not the desired teletext program is being broadcast, and if the program is not being broadcast, Since search information for all teletext programs currently being broadcast is displayed on the CRT, it is possible to know teletext programs that can be viewed instead of this program based on this content.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a block diagram of a teletext receiver of the present invention, and FIG. 2 is a block diagram of a teletext receiver of the present invention.
Flowchart showing character information processing of PU, Figure 3 (a
l”-(C1 is C1 by the character information processing shown in Figure 2.
It is a schematic diagram which shows the image displayed on RT. A: Teletext receiver, 1st part: Text signal receiving section, B: CPU, 13A:
・Detection section, 13B... Search section, 13C...
... Comparison section, 13]) ... Arithmetic processing section, 21.
...Memory section. Applicant Sharp Co., Ltd. Agent Patent Attorney Kazuhide Okada Figure 2 Figure 3 Procedural amendment (voluntary) Commissioner of the Japan Patent Office 3. Relationship with the person making the amendment Patent applicant address 22 Nagaike-cho, Abeno-ku, Osaka City No. 22 name (
504) Sharp Corporation Representative: Saeki Asahi 4, Agent Address: 8 Chiyoda Building North Building, 13-38 Naniwa-cho, Kita-ku, Osaka, Contents of Amendment (1) r14AJ on page 6, line 8 of the specification. "14B", page 6, line 9, 1. :j14BJ is written as r14AJ, “14A. into "Buffer 7 Memory 12" and "Repeat Section 12" on page 7, line 16.
``In PA Sakugun Department 18, page 6, line 10, ``
"Conversion circuit 23" is changed to "Conversion circuit 22", and the 9th
On the 15th line of the page, replace the text "Character signal output circuit 14" with "
Character information supply circuit 15", page 11, line 16, "1
"Store in 2E" is corrected to "Store in 12 and J." included in the list.”
Correct ``toru.'' to ``toru.'' (3)Amend Figure 1 in the drawings as shown in the attached sheet. that's all

Claims (1)

[Claims] (1) A teletext receiver that includes a television signal receiving section and a text signal receiving section that inputs a text signal based on the output signal of the receiving section, the text signal receiving section including the text signal receiving section that is included in the output of the text signal receiving section. a detection unit that detects the presence or absence of teletext based on the data; and a detection unit that detects the program numbers and other search information of all teletext programs included in the text signal in response to a detection signal indicating the presence of a text signal output from the detection unit. A search section that extracts
Compare characters displayed on the CRT, a search memory that stores search information from the search section, and the search information and teletext reception commanded in response to a command signal input via the operation section. and an arithmetic processing unit that reads display characters and search information stored in the search memory in response to a no-program signal outputted from the comparison unit based on the comparison result, and provides the display characters and search information to the CRT. A teletext receiver characterized by: