JP3443388B2 - Data broadcast receiver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a data broadcast receiving device for receiving document data or the like sent from a data broadcast, the Internet or the like and outputting it on a display screen.

[0002]

2. Description of the Related Art Conventionally, for example, HTML (Hyper Text Markup Language) has been used as a data description language used for exchanging and filing documents and data in a digital information communication network such as the Internet.

However, this HTML is a language for describing data for a person to browse, and for example, an application, not a person, finally understands the content and meaning of the data. It is not always suitable for describing new types of data.

For example, XML (eXtensible Markup) is used as a general-purpose data description language in which both such person and application can describe data in a format that can be understood and processed according to its purpose. La
nguage) is known.

On the other hand, in the BS digital broadcasting service which will be started in Japan in 2000, in addition to the conventional video and audio information, a service for providing various information data such as characters, figures, still images and computer data is provided. Be done.

In the system for receiving such various information data, that is, in the data broadcast receiving apparatus, it is necessary for the application as described above to understand the content and meaning of the data.

That is, in BS digital broadcasting,
For example, information data transmitted by digital broadcasting is temporarily stored in a memory in the temporary data broadcast receiving device or a memory external to the data broadcast receiving device, and the data thus stored is used to display on the display screen. For example, it becomes possible to output an electronic program timetable (EPG), a service linked to a program, and weather information linked to a user's residence area.

[0008] In BS digital broadcasting, in transmitting such information data, BML (Broadcasting Markup Langua) was formulated based on XML used as the above-mentioned multimedia coding method.
ge) will be adopted.

[0009]

The service itself of displaying data such as an electronic program timetable and weather information on the TV screen as described above is also realized by current terrestrial broadcasting.

In this case, when, for example, the state of displaying the weather information is changed to the state of displaying the electronic program timetable based on the instruction given by the viewer via the remote controller or the like, it is displayed on the screen. It becomes necessary to update the existing data information over the entire screen.

On the other hand, for example, in a state where the electronic program timetable is displayed, while sequentially displaying that a specific program at a specific time is selected according to an instruction given by a viewer from a remote controller or the like, When attempting interactive display with the viewer, there are cases where it is necessary to change only the display state of the data displayed at a specific location on the entire screen.

In this way, when it is necessary to update the display of the screen that has already been displayed, the first conventional method is to directly add each of the elements constituting the screen displaying the information data directly one by one. There is a method of updating the screen display while sequentially presenting the process of synthesizing the final display screen to the viewer. On the other hand, as a second method, by synthesizing each element that forms the screen inside the receiver and displaying them all at once, the process of synthesizing the entire updated display screen is not shown to the viewer. There is also.

However, in the above-mentioned method, for example, in the first method, a process of rewriting the entire screen is performed even in the operation of only updating a part of the elements on the display screen as described above. Since this is done, the screen flickers, and updating the entire screen increases the time required to complete the update of the display, thereby giving stress to the viewer.

On the other hand, in the second method as described above, each time the display screen is changed, the display screen is not updated until the newly displayed screen is completely composed.
Compared with the first method, the viewer feels that the response speed becomes slower.

With respect to such a decrease in response speed, a central processing unit (hereinafter referred to as CPU) which performs display processing in order to improve the processing speed inside the receiver.
Although it is sufficient to use a high-speed one, there is a problem that it causes a significant increase in cost.

The present invention has been made in order to solve the above problems, and its purpose is to provide a viewer with a viewer when an element corresponding to information data is displayed on a display screen. Even when performing interactive processing between, while suppressing the processing load on the display update processing,
An object of the present invention is to provide a data broadcast receiving device capable of suppressing stress on a viewer.

[0017]

According to another aspect of the present invention, there is provided a data broadcasting receiving apparatus, which receives a channel selecting means for selecting a channel for broadcasting information data and an output from the channel selecting means.
A document having a decoding means for extracting digital data and a data storage means having a data storage area for storing the digital data, wherein the digital data corresponds to a configuration of a plurality of elements output on a display screen. When the display screen is updated in response to an instruction from the outside, which has a data structure based on a structure tree, a process of sequentially updating each element that constitutes the entire display screen according to the document structure tree, and An arithmetic processing unit that selectively performs a process of updating the display screen after combining the updated images for some elements, and a display unit that outputs the display screen according to the output of the arithmetic processing unit are further provided. .

In addition to the configuration of the data broadcast receiving device according to claim 1, the data broadcast receiving device according to claim 2 has some of the plurality of elements to be updated in the document structure tree. It is an element having an overlapping portion on the display screen at least with the element.

According to a third aspect of the data broadcasting receiving apparatus, in addition to the configuration of the data broadcasting receiving apparatus according to the first aspect, the arithmetic means, when a preset series of processing procedures is designated, performs a series of processing. The display update processing that occurs during the procedure is stored, and after the series of processing procedures is completed, the corresponding images are internally combined and the display update processing is collectively performed.

In addition to the configuration of the data broadcast receiving device according to claim 3, the data broadcast receiving device according to claim 4 is a script process described in the BML language as a series of processing procedures.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] [Configuration of Data Broadcast Receiving Apparatus 1000] FIG. 1 is a schematic block diagram showing a main part of a configuration of a data broadcast receiving apparatus 1000 according to an embodiment of the present invention. It is a figure.

In the following description, a case where the BS digital broadcast receiver displays broadcast information data will be described. However, as will be apparent from the following description, the present invention is applicable to such a case. The present invention is not necessarily limited to a system for displaying information data transmitted via a digital information communication network such as the Internet, a system for displaying digital information data broadcast in another broadcasting format on the receiver side, More generally, it can be applied to a system for displaying digital information data on a terminal used by a user.

Referring to FIG. 1, data broadcast receiving apparatus 10
00, RF signals received from an antenna (not shown) are tuned by tuners 100.1 and 100.2, and 8PSK demodulators 102.1 and 102.
2 are given respectively.

8PSK demodulators 102.1 and 102.
The demodulated signals from 2 are transport stream decoders (hereinafter referred to as TS decoders) 104.1 and 10
4.2 to the MPEG-AV decoder 110 via the changeover switch 106. That is, the TS decoders 104.1 and 104.2 extract the baseband signal from the selected channel.

The MPEG-AV decoder 110 receives the data stream supplied from the changeover switch 106 and receives a random access memory (hereinafter referred to as RAM) 1
By using 12 as a buffer for temporarily storing data, it is converted into a video signal and an audio signal.

Here, as described above, the tuner 10
The two systems, that is, the system from 0.1 to TS decoder 104.1 and the system from tuner 100.2 to TS decoder 104.2 are provided for the image selected by the user on the display device (not shown). This is for receiving data to be stored in a storage device, which will be described later, in the background even while the signal and the audio signal are displayed.

The data broadcast receiving apparatus 1000 further includes
A built-in storage device 148 for receiving and storing signals from the TS decoders 104.1 and 104.2 via the data bus BS1 and a data bus BS1.
For the data stored in the built-in storage device 148,
Arithmetic processing unit 144 for performing predetermined processing and outputting
A ROM 140 for recording a program in the arithmetic processing of the arithmetic processing unit 144, a RAM 142 providing a memory area for the operation of the arithmetic processing unit 144, and data input / output between the data bus BS1 and the outside. And a high speed digital interface 146. Although not particularly limited, the built-in storage device 148 and RO
As M140, for example, electrically writing / writing data
A readable flash memory can be used.

After the arithmetic processing unit 144 processes the data stored in the built-in storage device 148 according to the instruction given from the outside, the data is synthesized from the on-screen display processing unit 130. To the vessel 160.2.

The synthesizer 160.2 synthesizes the output from the MPEG-AV decoder 110 and the output from the on-screen display processing device 130, and then supplies the image output terminal 164. The output from the video output terminal 164 is
It is given to a display device (not shown).

The data broadcast receiving apparatus 1000 further includes
Based on the data stored in the built-in storage device 148, the result data processed by the arithmetic processing unit 144 and the like are received to generate a sound effect output in a display device (not shown) and the synthesizer 160. 1 to receive the data processed by the arithmetic processing unit 144 based on the data accumulated in the built-in storage device 148 and the additional sound generator 120 for giving the audio signal to the synthesizer 160.1. A PCM decoder 122 is provided.

The synthesizer 160.1 outputs the output from the MPEG-AV decoder 110 and the additional sound generators 120 and P.
Upon receiving the output from the CM decoder 122, the synthesized result is given to the audio output terminal 162. The audio signal provided to the audio output terminal 162 is output as an audio signal from a display device (not shown).

The data broadcast receiving apparatus 1000 receives an information from a modem 150 for exchanging data with the outside and an I card for receiving information from an IC card, if necessary.
It may be configured to include the C card interface 152.

Through the high-speed digital interface 146, for example, an external storage device 180 such as an HDD device for a home server and a remote controller (or keyboard etc.) 182 which is an external input device are connected to the data bus BS1.
Connected with.

FIG. 2 is a schematic block diagram showing the structure of the browser for displaying the document data extracted from the structure shown in FIG. Such a browser is the processing unit 1
The document data display process is performed based on the process of a syntax analysis program called a “parser” executed by 44. The parser may be realized by software executed by the arithmetic processing unit 144, or
It may be realized on dedicated hardware.

As described above, in BS digital broadcasting, document data and the like are transmitted as BML data.
BML used in the data encoding method of this BS digital broadcasting is a tagging language based on XML as described above.

Referring to FIG. 2, when the user issues a display instruction of BML document data by key input of a remote controller or the like, the parser (BML browser) on the arithmetic processing unit 144 causes the designated BML document file to be BML document file. The file system 188 is read via the document file reading unit 1442.
(Built-in storage device 148 or external storage device 18
Read from 0).

In the parser on the arithmetic processing unit 144, after the read BML document is lexically analyzed by the lexical analysis unit 1444, the syntactic analysis unit 1446 parses it, and the DOM tree creation unit 1448 analyzes the start tag, character data, A DOM (Document Object Mode) indicating the logical structure of the BML document is recognized on the RAM 142 by recognizing the end tag.
l) Create a document structure tree called a tree. This DO
The M-tree is composed of a plurality of nodes, as will be described later.

Main processing unit 1450 of arithmetic processing unit 144
In the above, the completed DOM tree is sequentially referenced from the root element, and the BML document is displayed on the display device 192 through the display processing unit 190 (the on-screen display processing unit 130 and the synthesizer 160.2 are collectively referred to as the display processing unit 190). Display to. At this time, an image file or the like referred to in the BML document may be read from the file system 188 and used as a part of the screen displayed on the display device 192.

FIG. 3 is a conceptual diagram showing an example of the display screen 200 of the display device 192 shown in FIG.

In the example shown in FIG. 3, a state in which a normal television screen is received and a menu screen for displaying information data is displayed is shown.

That is, referring to FIG. 3, the display screen 20
During 0, the display area is reduced from the entire display screen 200 and the television screen 202 is displayed, and the menu of information broadcast as information data is "news", "weather forecast", "sports". , And “program information” corresponding to virtual buttons 210 on the screen for selecting news, button 212 for selecting weather forecast, and button 21 for selecting sports information.
4 and a button 216 for selecting program information are displayed.

Of course, the number of items of the menu displayed on the menu screen depends on the type of data to be broadcast.
It may be more than that shown in FIG.

The buttons 210 to 216 shown in FIG. 3 are all conceptually displayed on the display screen.
The actual selection is performed, for example, by the viewer selecting any button from the remote control.

FIG. 4 is a conceptual diagram for explaining components in displaying a button on the screen as shown in FIG. 3 in the data broadcasting language BML defined based on XML. .

In FIG. 4, the button 21 shown in FIG.
0 to 216 are collectively referred to as "button 1".

Here, in the display screen as shown in FIG. 3, the element that becomes the background of the entire display portion corresponding to the data and becomes the root of all the elements is referred to as "body (bo)".
dy) ”.

In this case, as the element for expressing the "button 1" on the screen, first, "the background of the body element"
And "division element (hereinafter referred to as div element)" as a child element of the body element. Here, if the frame of this element is black, it means that the "button 1" is selected, and if this frame is transparent, it means that the "button 1" is not selected. .

As elements constituting "button 1", "object element (hereinafter referred to as" object element ")" indicating the outer shape of the button as child elements of the div element, and "child element of the body element". Character element (hereinafter referred to as p element) ". Where obje
The ct element cannot be a child element of the body element directly. Therefore, the div element is used as an intermediary. As described above, by using the color of the frame of the div element, it is possible to represent the selection state of the element.

By superposing these respective elements,
"Button 1" will be expressed.

The information regarding each of these elements is held in the BML document file shown in FIG. 2, and the arithmetic processing unit 144 synthesizes the information and outputs it to the display processing unit 190.

The elements as described above are rectangular, and the display information is updated on an element-by-element basis except for the processing in which the BML file to be displayed is changed.

FIG. 5 is a conceptual diagram showing a DOM tree showing the structure of elements on the menu screen as shown in FIG.

The body element showing the whole data display is
As its child elements, it has div elements el11 to el51 and p elements te1 to te4.

The div element further has, as its child element,
Each has object elements el12 to el52.

Here, in the example shown in FIG. 5, the frame of the div element el11 corresponding to news in the p elements is black, and other p elements (weather forecast, sports, program information), etc. The corresponding div element el2
Since the frames 1 to el51 are all transparent, the button corresponding to news is selected. Further, the body element also includes the television screen itself as an object element.

FIG. 6 is a diagram for explaining the flow of processing for updating the display of the entire screen when the screen display state as shown in FIG. 3 is switched from another screen display state. is there.

That is, referring to FIG. 6A, when the screens are switched, first, the body screen shown in FIG.
The y element is displayed, that is, the background color is displayed. Up to this point, the display of "body (background)" in FIG. 5 is completed.

Subsequently, referring to FIG. 6B, the body is
A black frame is displayed in correspondence with the element el11 that is a child element of the element, and the outline of the button is displayed in correspondence with the child element el12. By this, the display up to the element el12 in FIG. 5 is completed.

Further, referring to FIG. 6 (c), body
After the character element "news" is displayed corresponding to the child element te1 of the element, similarly, the child element el21 of the body and its child element el22, and the character element te
The display corresponding to 2 is made. Up to this point, the display of the button corresponding to the "weather forecast" (element te2) is completed.

Subsequently, referring to FIG. 6D, the sports button 214 is displayed corresponding to the element el31 and its child element el32. By this, the display up to the element el32 in FIG. 5 is completed.

FIG. 7 is a conceptual diagram showing a process of displaying a display screen as shown in FIG. 3 following FIG.

With reference to FIG. 7E, following FIG. 6D, the child element el41 of body and its child element el4
By displaying 2 and the character element te4, the display of the button 216 corresponding to the program information is completed.

Further, referring to FIG. 7 (f), body
By displaying the child element el51 and its child element el52, the television screen 202 is displayed on the display screen 200.

When the display screen as shown in FIG. 3 is switched from another display screen through the above processing steps, the display elements on the screen are updated over the entire screen.

On the other hand, as described above, the display of a part of the screen may be updated while the screen display shown in FIG. 3 is being performed.

FIG. 8 is a conceptual diagram showing a state in which the display screen is updated in response to the change of the selected button.

Referring to FIG. 8, in the following description, from the state where the button 210 corresponding to news is selected, that is, the state where the news button 210 is surrounded by a black frame, the button 212 corresponding to weather forecast is displayed. Will be selected and the display will be updated so that the button 212 is surrounded by a black frame.

In this case, button 210 and button 2
It is not necessary to update the display parts other than 12.

FIG. 9 is a diagram showing a DOM tree in a state where the button 210 corresponding to news is selected from among the items shown in FIG.

That is, in FIG. 9, the frame of the div element of the child element el11 of the body element is black, and the body is
The frame of the div element corresponding to el21 that is a child element of the element is transparent.

On the other hand, in FIG. 10, after the display is updated as shown in FIG. 8, that is, the button 212 corresponding to the weather forecast is selected and the button 212 is surrounded by a black frame. It is a conceptual diagram which shows a tree.

In FIG. 10, the frame of the div element corresponding to the child element el11 of the body elements becomes transparent,
The frame of the div element corresponding to the child element el21 of the body element is changed to black.

In FIG. 9 and FIG. 10, the elements whose display is changed as shown in FIG. 8 are indicated by hatching.

Further, as will be described later, when such a display is updated, an element to be updated is indicated by a thick black frame in order to distinguish it from other elements.

In the case as shown in FIGS. 8 to 10, there is no partial overlap between the elements displayed on the screen.

Therefore, also in such a case, it is necessary to redisplay all the overlapping elements as in the case shown in FIG.

However, the relationship between the elements displayed on the screen is not limited to the case where there is no partial overlap with each other as shown in FIG.

FIG. 11 is a conceptual diagram showing another example of the array of elements displayed on the screen 200. In FIG. 11, the element corresponding to the entire screen 200 is represented by element 1.

At this time, the element 3 is displayed as being present behind the element 4. In such a display state, for example, when trying to update the display state of only the element 3, if only the display state of the element 3 is changed and overwrite is performed, the element 3 exists on the back surface of the element 4. Therefore, the element 4 is located on the back surface of the element 3 on the contrary.

FIG. 12 is a conceptual diagram showing the structure of the DOM tree corresponding to the screen shown in FIG.

Element 2, element 5, and element 8 exist as child elements of element 1. Element 3 and element 4 are present as child elements of element 2, and element 6 and element 7 are present as child elements of element 5.

In this case, in such a BML document file structure, the child element is always displayed above the parent element, and the sibling elements are displayed in the storage order (from left to right in the tree display).

At this time, even when only the element 3 is updated, it is necessary to perform the update processing for all of the elements 2, 3, and 4.

FIGS. 13 to 17 are flowcharts for explaining the operation performed by the arithmetic processing unit 144 when performing the update processing on the screen in consideration of the above circumstances.

As described above, assuming that the display update processing is performed every time an updated area is generated, for example, when a plurality of areas are updated in the flow of a series of processing, the processing time is increased. It will be. This in turn causes unnecessary stress to the viewer.

Therefore, it is desirable to process a plurality of display updates that occur during a series of operations as collectively as possible.

Here, the display is updated by an event. There are the following three types of such display updates.

First, the BML text is changed and the entire screen is updated. Secondly, the state of the element is changed and the display style of the element is updated.
Thirdly, the display contents of the element are updated by the script executed by the event.

Here, the "element state" means "normal", "focus", or display style for each element.
Which means that it is possible to have a state of "active".

The “script” is a program described in the BML document and expresses a series of work procedures registered in advance.

In the first case, the display is updated immediately, but in the second case, the display update process is performed after the elements to be updated are internally combined. In the third case, The display update that occurs in the series of processes of the script is basically not performed each time, but is collectively performed after the completion of the script. However, when a process that requires display update is described in the script, the display can be updated on the spot.

With reference to FIG. 13, although not particularly limited,
For example, the process is started by the viewer pressing the "data" button on the remote controller (step S200).

Subsequently, the arithmetic processing section 144 waits in an event waiting state until some event occurs (step S202).

In the flow shown in FIG. 13,
It is assumed that the event of "change of BML text file" automatically occurs at the time when the process is started in step S200. At this time, the file name to be changed is also set in advance. However, more generally, the initial event may occur in response to an instruction from the viewer.

Subsequently, the arithmetic processing section 144 determines the type of event that has occurred (step S204).

When the "change BML text file" event has occurred, a new BML file is read and a DOM tree is created (step S20).
6). Further, the sequential display update process is performed based on the DOM tree (step S208), and the process returns to step S202.

On the other hand, when an event other than the "change BML text file" event has occurred, it is determined whether the event processing has ended (step S21).
0). If the event processing is not completed, the event processing for one step is executed (step S212),
The process returns to step S210. On the other hand, when the event process is completed (step S210), the process returns to step S202.

FIG. 14 shows step S21 shown in FIG.
It is a flowchart which shows the routine of "event processing for 1 step" of 2.

Referring to FIG. 14, when the "event processing for one step" routine is started (step S30)
0), and then the arithmetic processing unit 144 determines the type of processing (step S302).

If it is an element state changing process (step S302), the changed display style is set to the target element (step S304), and the display rectangle of the element is listed as an update rectangle in the update rectangle list (step S30).
6). Subsequently, the collective display update process is performed (step S308), and the event process for one step ends (step S330).

In case of script processing (step S3)
02), script execution processing is performed (step S32).
0) As a result of the script processing, it is determined whether or not data is set in the updated rectangle list (step S322). If data is set in the update rectangle list, batch display update processing is performed (step S
324), the process ends (step S330). On the other hand, if no data is set in the updated rectangle list, the event process for one step ends (step S330).

If it is neither element state change processing nor script processing (step S302), the processing is performed (step S310), and the event processing for one step is completed (step S330).

FIG. 15 shows the step S32 shown in FIG.
It is a flow chart which shows the flow of 0 script execution processing.

Referring to FIG. 15, when the script execution process is started (step S400), it is determined whether or not there are remaining steps in the script (step S400).
402). If there are remaining steps, the script for one step is executed (step S404), and then,
It is determined whether or not there is a process requiring display update in the step executed in step S404 (step S).
406). If there is an updated element (step S40)
6), the display rectangle of the element is added to the update rectangle list (step S408), and the process returns to step S402. On the other hand, if there is no updated element (step S4)
06), the process returns to step S402.

On the other hand, if it is determined in step S402 that there are no remaining steps, the script execution process ends (step S410).

FIG. 16 is a flow chart showing the flow of the sequential display update processing shown in FIG.

Referring to FIG. 16, when the sequential display updating process is started (step S500), the arithmetic processing section 144 is executed.
Sets the body element, which is the root element of the display element, as the current element (element to be processed) (step S50).
2).

Then, the current element is output on the display screen (step S504). If the current element has a child element (step S506), the eldest son element (first child element) is set as the current element (step S508), and the process proceeds to step S5.
Return to 04.

In step S506, when the current element has no child element, it is subsequently determined whether or not the current element has a younger brother element (the element next to the current element having the same parent) (step S510). ). When the current element has a younger brother element (step S510), the younger brother element is set as the current element (step S512), and the process returns to step S504. On the other hand, in step S510, if the current element does not have a younger brother element (step S510), the sequential display update process ends (step S520).

FIG. 17 is a flow chart showing the flow of the batch display update process shown in FIG.

Referring to FIG. 17, when the collective display updating process is started (step S600), the arithmetic processing section 144 is executed.
Sets the body element, which is the root element of the display element, as the current element (element to be processed) (step S60).
2).

[0112] Subsequently, a determination whether there is at least one and the overlapped part of the rectangular current elements are elevation up <br/> is the update rectangle list is performed (step S604).

When there is an overlap between the current element and the element in the updated rectangle list (step S604), the current element is combined on the virtual screen inside the receiver, that is, in the memory space of the RAM 142 (step S606). . Subsequently, when the current element has a child element (step S608), the eldest son element (first child element) is set as the current element (step S61).
0), the process returns to step S604.

If there is no overlap between the current element and the element in the updated rectangle list in step S604, or if the current element has no child element in step S608, then the current element has a younger brother element (the current element having the same parent). It is determined whether or not there is an element next to the element (step S6).
12). When the current element has a younger brother element (step S61)
2), the younger brother element is set as the current element (step S614), and the process returns to step S604.

On the other hand, if there is no younger brother element in the current element in step S612, a rectangle whose display needs to be updated is cut out from the virtual screen inside the receiver and copied to the actual display screen (step S620). This copy is done for every element in the update rectangle list. Next, the contents of the updated rectangle list are cleared (step S6).
22), the collective display update process ends (step S63).
0).

Here, the processing from step S602 to step S620 will be described below with reference to the elements shown in FIGS. 11 and 12 when the element 3 is the update target.

That is, when the process first moves to step S602, the element 1 is first specified as the target of the process, and the body element is made the current element (step S60).
2). Subsequently, since the element 1 has an overlap with the element 3 to be updated (step S604), internal composition is performed as an element to be updated corresponding to the update of the partial screen (step S604). S606).

Subsequently, since the child element 2 of the element 1 exists as the next element (step S608), the element 2 is specified as the processing target and is set as the current element (step S61).
0).

Further, returning to step 604, since the element 2 overlaps with the element 3 to be updated (step S604), the element to be updated corresponding to the partial screen update. Internal synthesis is performed as (step S606). Then, as the next element, the child element 3 of the element 2 exists (step S60).
8), the element 3 is specified as the processing target and is set as the current element (step S610).

Since element 3 is the rectangle itself to be updated,
Naturally, there is an overlap with the updated rectangle list (step S6).
04), elements are internally synthesized (step S6).
06).

Next, since the element 3 has no child element (step S608), the processing shifts to step S612.
Since the element 3, which is the younger brother element, exists in the element 3 (step S612), the element 4 which is the child element of the element 2 is set as the next element.
Is set as the current element (step S614), and the element 4 has an overlap with the element 3 to be updated (step S604). Therefore, the corresponding element is internally combined as the element to be updated (step S606). .

Element 4 has no child element (step S6).
08), since there is no younger brother element (step 612), the process proceeds to step S620, and the rectangular display is updated (step S620).

On the other hand, the elements 5 to 8 have no overlap with any of the elements to be updated, so the processing is skipped for this element. For example, at the time when the element 5 is skipped, the child elements, that is, the elements 6 and 7 should naturally have no overlapping portion, so that the elements 6 and 7 are skipped without checking the overlapping.

Elements 1, 2 updated as described above
The elements synthesized internally for 3 and 4 are step S
Will be output at 622.

With the above-described processing, the update of the display generated in the series of processes of the script is not executed each time, but the update process is collectively executed after the completion of the script.

In the above description, for example, in FIG. 13, after the viewer starts the process by pressing the "data" button on the remote controller, the ending operation such as the viewer pressing the "data" button again. It is also possible to adopt a configuration in which the process is immediately exited from the processing flow of FIG.

When the entire screen is updated by performing the above processing, each component is displayed on the screen 20.
0 is sequentially displayed according to the structure of the DOM tree.
Therefore, the viewer can recognize that the image data is being updated with good responsiveness in accordance with the instruction given by the viewer.

On the other hand, if only some of the constituent elements on the screen are to be updated, the display of the elements to be updated is synthesized internally and then the display is collectively updated in step S620. , The viewer recognizes that the display screens are collectively changed in response to the instruction given by the viewer. Since the processing load is not large,
Also in this case, the viewer can recognize that the image data is being updated with good responsiveness.

That is, in the case of updating the entire screen which requires a relatively long processing time, by displaying each constituent element on the screen in sequence, the screen is actually displayed after the viewer gives an instruction. It is possible to shorten the waiting time until the display update is started and reduce the stress on the viewer.

On the other hand, when only a part of the elements displayed on the screen needs to be updated, that is, when the processing time is not long, all the elements related to the elements updated according to the instruction of the viewer are displayed. Since the screen display is changed in a batch after the update screens are combined for the elements internally, the processing of elements unrelated to the update is skipped to shorten the processing time and eliminate the screen update (flicker) that the viewer does not expect. be able to. Therefore, the viewer does not feel stress.

By such processing, the screen display processing can be simplified and the display response can be improved.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

[0133]

As described above, in the data broadcasting receiving apparatus according to the present invention, when the element corresponding to the information data is displayed on the display screen, the interactive processing with the viewer can be performed. Also when performing, depending on the load of the processing amount, it is selected whether each element is sequentially updated on the screen or displayed after the updated image is combined by the background processing. Further, in the latter case, continuous display update processing is collectively processed. Therefore, it is possible to suppress the stress on the viewer while suppressing the load of the processing amount in the display update process.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing the configuration of a data broadcast receiving device 1000 of the present invention.

FIG. 2 is a schematic block diagram showing an extracted configuration of a browser that displays document data.

FIG. 3 is a conceptual diagram showing an example of a display screen 200 of a display device 192.

FIG. 4 is a conceptual diagram for explaining components when displaying buttons on a screen.

FIG. 5: DO showing the structure of elements on the menu screen
It is a conceptual diagram which shows an M tree.

FIG. 6 is a diagram for explaining the flow of processing when updating the display of all screens.

FIG. 7 is a conceptual diagram showing a process of displaying a display screen when updating the display of the entire screen.

FIG. 8 is a conceptual diagram showing a state in which the display screen is updated in response to a change in the selected button.

FIG. 9 is a diagram showing a DOM tree in a state where a button 210 corresponding to news is selected.

FIG. 10 is a conceptual diagram showing a DOM tree corresponding to a state in which a button 212 corresponding to a weather forecast is surrounded by a black frame.

FIG. 11 is a conceptual diagram showing another example of an array of elements displayed on the screen 200.

FIG. 12 is a DO corresponding to the screen as shown in FIG.
It is a conceptual diagram which shows the structure of M tree.

FIG. 13 is a flowchart for explaining an overall processing flow.

FIG. 14 is a flowchart showing the “event processing for one step” routine of step S212 shown in FIG.

15 is a flowchart showing a flow of script execution processing of step S320 shown in FIG.

16 is a flowchart showing a flow of a sequential display update process shown in FIG.

FIG. 17 is a flowchart showing a flow of collective display update processing shown in FIG.

[Explanation of symbols]

100.1, 100.2 Tuner, 102.1, 10
2.2 8PSK demodulator, 104.1, 104.2 T
S decoder, 106 selector switch, 110 MPEG-
AV decoder, 112 RAM, 120 additional sound generator, 122 PCM decoder, 130 on-screen display processing unit, 140 ROM, 142 RA
M, 144 arithmetic processing unit, 146 high-speed digital interface, 148 built-in storage device, BS1 data bus, 150 modem, 152 IC card interface, 160.1, 160.2 synthesizer, 162 audio output terminal, 164 video output terminal, 180 external Storage device, 182 external input device, 188 file system, 1000 data broadcast receiving device, 1442BM
L document file reading unit, 1444 lexical analysis unit, 144
6 Parsing part, 1448 DOM tree creation part.

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-11-146365 (JP, A) JP-A-11-112946 (JP, A) JP-A-2001-148837 (JP, A) JP-A-10-32765 (JP, A) Special Table 2002-504787 (JP, A) International Publication 00/028737 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 5/44-5/445 H04N 7/08-7/081 H04H 1/00

Claims (4)

(57) [Claims] 1. A data broadcast receiving device, comprising: channel selection means for selecting a channel on which information data is broadcast; and decoding means for receiving digital data from the channel selection means and extracting digital data. And a data storage unit having a data storage area for storing the digital data, wherein the digital data has a data structure based on a document structure tree corresponding to a configuration of a plurality of elements output on a display screen. When updating the display screen according to an instruction from the outside, a process of sequentially updating each of the elements forming the entire display screen according to the document structure tree, and a part of the plurality of elements Arithmetic processing means for selectively performing the processing of updating the display screen after internally combining the updated images for the elements of, and the display screen according to the output of the arithmetic processing unit. The data broadcast receiving apparatus further comprising a display unit for outputting the. 2. Some of the plurality of elements are:
The data broadcast receiving device according to claim 1, wherein in the document structure tree, the element is an element to be updated and at least an element having an overlapping portion on the display screen. 3. The computing means stores a display update process occurring during the series of processing procedures when a series of processing procedures which can be set in advance is designated, and stores the display updating processing after the series of processing procedures. The data broadcast receiving device according to claim 1, wherein the corresponding images are internally combined after the display update processing and the display update processing is collectively performed. 4. The data broadcast receiving apparatus according to claim 3, wherein the series of processing procedures is script processing described in a BML language.