JP2658049B2 - Teletext receiver - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a teletext receiver for receiving a teletext signal.

2. Description of the Related Art There are several types of character broadcasts for broadcasting various character / graphic programs using gaps in television radio waves.

One of them is the collective form. The collective type is a form in which presentation processing is performed after receiving all page data of a program on the receiver side, and a form in which each page data is collectively used on the receiver side.

Conventionally, when a page update request is made for these batch programs, processing of the next page is performed after display of each page is completed.

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

Reference numeral 1 denotes a character signal extracting unit which extracts a character broadcast signal from the video signal from the video signal input unit A in one vertical synchronization cycle, and takes in effective data for each scanning line into an internal buffer RAM.

Reference numeral 2 denotes a key processing unit which has various input keys for using a teletext program, discriminates a key input, encodes the key input, and transmits it to the control unit 3 described below.

Reference numeral 3 denotes a control unit for performing initial setting, and further, a key processing unit 2
Then, the coded key input transmitted from the CPU 1 is determined, the corresponding data is searched out from the buffer RAM of the character signal extracting unit 1, the data is processed, and then written into the video RAM (VRAM) 4.

The VRAM 4 is a video RAM in which character / graphic data is written from the control unit 3 and is used to display and read the written data to the video synthesizing unit 6 in synchronization with a video synchronizing signal.

A video / color signal processing unit 5 processes the video signal from the video signal input unit A, converts the video signal into an RGB signal, and outputs the RGB signal to the video synthesizing unit 6.

The video synthesizing unit 6 synthesizes and outputs the video signal from the VRAM 4 and the video signal from the video / color signal processing unit 5.

The display 7 displays an output from the video synthesizing unit 6.

Reference numeral 8 denotes a batch program register for storing whether or not the selected teletext is a batch program.

When the batch program is composed of three pages, when the page key is pressed, the program is displayed as shown in FIG.

If the teletext program is a collective program, the contents of the first block of the program data are detected by the control unit 3, the collective program register 8 is set, and the control unit 3 performs collective program processing according to the contents of the collective program register 8. After the first one-page screen is displayed, the second-page screen, the third-page screen, and then the one-page screen are sequentially displayed each time the page key is pressed.
At this time, after the screen of each page is completely displayed, the next page is displayed.

Problems to be Solved by the Invention However, in the past, when a batch program of teletext was received, pressing the page key does not immediately lead to the next page, and the displayed page is completely displayed. I had to wait for it to finish. When there is a relatively long processing time in a batch program composed of a plurality of pages, the key responsiveness is particularly poor.

In particular, in the case where a page is repeatedly used repeatedly, such as in a table of contents program, there is a problem in key operability.

The present invention has been made in view of the above problems, and when a page key is pressed,
An object of the present invention is to provide a teletext receiver capable of displaying the next page without waiting because the display of the currently displayed page is completely completed.

Means for Solving the Problems According to the present invention, when a collective program including a plurality of pages is received, each attribute register for checking each attribute during the first cycle of the page is provided, and the collective program reception is performed. Sometimes the attribute is detected in the first display processing, and after the top of the page is requested again in the page request, the next page processing is performed immediately even if the current page is being processed for each page request according to the detection result of the attribute. It is characterized in that it is configured to perform.

Effect of the Invention According to the present invention, when a batch program having a plurality of pages is received, each attribute is detected before the last page is detected, and when the attribute is not detected from the second round, the page display is completed. If not, the process starts immediately from the beginning of the next page. In this case, the next page can be displayed before the display is not completed.

Embodiment An embodiment of the present invention will be described below 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. 4 have the same functions, and detailed description thereof will be omitted.

Reference numeral 10 denotes a control unit which has, in addition to the function of the control unit 3 of the conventional example, an attribute detecting function in a collective program and a function of calculating addresses of a program composed of a plurality of pages.

Reference numeral 11 denotes an attribute register, which is set when it is detected that an external character designation or concealment is included in the program.

Reference numeral 12 denotes a counter which is set when the page feed of the collective program has completed one cycle.

Reference numeral 13 denotes a next page address buffer, which stores an address of a buffer in which data of a page next to the currently displayed page is stored.

 The operation of the present invention will be described below.

When the key processing unit 2 requests a teletext program, the control unit 10 finds the requested teletext program from the teletext data taken into the text signal sampling unit 1 and takes it into the internal buffer memory. . If this program is a batch program, the batch program register 8 is set,
Write the contents of the first page to VRAM4. The contents of the VRAM 4 are combined with the signal from the video / color signal processing unit 5 by the video combining unit 6 and displayed on the display 7.

If an attribute such as an external character designation or concealment that affects over a plurality of pages is detected during the display processing of the contents of the first page, the control unit 10 sets the attribute register 11. Further, the next page address buffer 13 stores an address storing the data of the second page of the internal buffer memory.

Hereinafter, the same processing is performed every time the page key is pressed. When the last page is detected, the counter 12 is set. It should be noted that since the codes indicating them are incorporated in the teletext program, the attributes may be detected.

When the page key is pressed to enter the second round, if the attribute processing is being performed when the page key is pressed, the page is completed if the attribute register 11 is set, the next page is displayed, and the attribute register 11 is set. If not, the address of the data buffer inside the control unit 10 is fetched from the next page address buffer 13 and the display processing of the next page is immediately performed.

 FIG. 2 shows the flow of the above processing.

FIG. 3 shows a display example when the attribute register 11 is not set.

As described above, according to the present invention, when a batch program is received by teletext, the attributes of each page are checked in the first round,
For the second and subsequent rounds, even if the page key is pressed during the screen display, if the attribute is not checked, there is a function to immediately go to the display processing of the next page. An excellent effect of shortening can be obtained.

[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 simplified flowchart of processing in the embodiment, FIG. 3 is a front view showing screen display contents in the embodiment, FIG. 4 is a block diagram of a conventional teletext receiver, and FIG. 5 is a front view showing screen display contents in the conventional example. 1 ... Character signal extraction unit 2 ... Key processing unit 4 ... VRA
M, 5: video / color signal processing unit, 6: video synthesis unit, 7
...... Display, 8 ... Batch program register, 10 ... Control unit, 11 ... Attribute register, 12 ... Counter, 13 ... Next page address buffer.

Claims (1)

(57) [Claims] A control unit having attribute detecting means in a collective program for performing display processing after receiving all page data of a teletext program and address calculating means for a program comprising a plurality of pages, and a teletext program being a collective program. First storage means for storing the presence of data, second storage means for storing attribute data for each page, a counter which is set when the page feed of the batch program has completed one cycle, and an address of next page data. The control unit performs batch program processing in accordance with the contents of the first storage means and receives all pages of the batch program and stores the received program in the second storage means when receiving the batch program. For a page for which attribute data has not been set for each page, the next page display processing is immediately performed by the data of the next page address means in response to the pressing of the page key. Broadcast receiver Machine.