KR100744259B1 - Digital multimedia receiver and method for displaying sensor node thereof - Google Patents

Abstract

The present invention extracts identification information and position information of a sensor node included in a predetermined scene from a BIFS (Binary Format for Scene) tree, sorts them sequentially according to a predetermined degree of proximity with a preset reference position, and inputs a direction key input from the outside. The present invention relates to a digital multimedia receiver for selecting a sensor node and displaying a predetermined graphic object in a screen area corresponding to the location information thereof, and a method for displaying the sensor node. The method relates to a sensor node in a digital multimedia receiver that does not support a touch screen. Related objects can be identified, moved and specified by the user.

BIFS, Tree, SensorNode, Sorting, Scene, Order

Description

Digital multimedia receiver and method for displaying sensor node

1 is a block diagram showing a digital multimedia receiver according to the present invention;

FIG. 2 is a view illustrating a Witch's Choice field used in the present invention; FIG.

3 is a view showing a sensor node used in the present invention,

4 is a diagram illustrating a sensor node list according to the present invention;

5 is a view provided to explain the sorting of sensor nodes according to the present invention;

6 is a view provided to explain the movement of sensor nodes according to the present invention;

7 is a view provided to show that the sensor nodes in accordance with the present invention is moved on the screen,

8 is a diagram illustrating a sensor node display method of a digital multimedia receiver according to the present invention.

Explanation of symbols on the main parts of the drawings

100: preprocessor 101: tuner

102: OFDM demodulator 110: demultiplexer

111: MSC demultiplexer 112: TS demultiplexer

113: MPEG-2 system decoder 120: BIFS decoder

130: memory 140: control unit

150: MPEG-4 audio / visual decoder 160: video processor

170: display unit

The present invention relates to a digital multimedia receiver and a sensor node displaying method for allowing a user to identify, move, and designate an object related to a sensor node in a digital multimedia receiver in which a touch screen is not supported.

Digital Multimedia Broadcasting (DMB) extends the standard DAB (Digital Audio Broadcasting) standard, which provides clear audio quality information, traffic information, and web data, and provides video information.

In addition, the DMB defines a two-dimensional or three-dimensional image or a uniform resource locator (URL) of a broadcasting web site as an object, which constitutes a predetermined scene. It provides information about where it is located, etc. In particular, it also provides sensor node information needed to move from one object to another in the same scene.

The sensor node information is described through a Binary Format for Scene (BIFS) command and provided to a digital multimedia receiver. The digital multimedia receiver may indicate that a certain object exists in a certain area on the screen according to the sensor node information. If the user touches the area, the user can select the corresponding object to display related information. If the user touches another area, the user can move from the corresponding object to the other object.

However, since the sensor node information is based on the touch screen, the digital multimedia receiver that does not support the touch screen cannot determine where the sensor node is located on the screen, and the movement and selection between the objects included in the screen. Is virtually difficult in itself.

Accordingly, the present invention has been developed to solve the above problems, the digital multimedia receiver and its sensor node display for the user to identify, move and select the object associated with the sensor node in the digital multimedia receiver that does not support the touch screen The purpose is to provide a method.

Digital multimedia receiver of the present invention for this purpose is

A preprocessor for receiving and demodulating a broadcast signal, a demultiplexer for demultiplexing a broadcast stream in a broadcast signal demodulated by the preprocessor, and outputting a BIFS (Binary Format for Scene) command, and a BIFS command outputted by the demultiplexer A BIFS decoder that decodes a BIFS tree, a memory that stores a BIFS tree configured by the BIFS decoder, and a sensor node by extracting and sorting identification information and location information of a sensor node included in a predetermined scene from the BIFS tree stored in the memory. A control unit for constructing a list and selecting one of the sensor nodes constituting the sensor node list according to a direction key input from the outside and outputting the position information thereof, and a graphic object in a screen area corresponding to the position information output by the control unit. To overlay the image processor, and to display the graphic object overlayed by the image processor on the screen. It characterized in that made in a display.

Another method of displaying a sensor node of a digital multimedia receiver according to the present invention is

Finding a sensor node included in a scene to be displayed on a screen in a BIFS tree in a digital multimedia receiver and extracting identification information and location information of the sensor node; sorting the location information of each extracted sensor node together with the extracted identification information Constructing the sensor node list according to the sorting order; when a direction key is input from the outside, the sensor node constituting the sensor node list is sequentially arranged according to the direction corresponding to the input direction key and the number of times of input. Moving and selecting one, displaying a graphic object in a screen area corresponding to the position information of the selected sensor node.

In particular, the location information of each extracted sensor node may be sorted according to a degree of proximity with a preset reference position, and the sensor node list may be configured in the sorted order together with the extracted identification information. The reference position may be any one selected from positions corresponding to four corners of the screen.

The extracting of the identification information and the location information of the sensor node may include configuring a BIFS tree with a BIFS command received through a broadcast signal, and a sensor located below each transform 2D node and an anchor node in the configured BIFS tree. And extracting identification information and location information of the node.

In particular, in order to extract identification information and location information of a sensor node related to a scene to be displayed on the current screen, the flag value recorded in the WhichCice field under each transform 2D node and anchor node in the configured BIFS tree. According to the present invention, the identification information and the location information of the sensor node are selectively extracted.

After the displaying of the graphic object, if a direction key is input from the outside, one of the direction keys is sequentially moved based on the selected sensor node according to the direction corresponding to the input direction key and the number of times of input. Characterized in that it further comprises the step of selecting.

Finally, the sensor node registered in the list is updated each time the scene changes, and may be any one of a touch sensor node and an anchor node.

Hereinafter, with reference to the accompanying drawings will be described in more detail the present invention.

1 is a diagram illustrating a digital multimedia receiver according to the present invention as an example.

As shown in FIG. 1, the digital multimedia receiver according to the present invention has a preprocessor 100, a demultiplexer 110, a BIFS decoder 120, a memory 130, a controller 140, and an MPEG-4. The audio / visual decoder 150, the image processor 160, and the display unit 170 are configured.

The preprocessor 100 receives and demodulates a broadcast signal. The preprocessor 100 includes a tuner 101 and an orthogonal frequency division multiplex (OFDM) demodulator 102.

The tuner 101 receives a broadcast signal transmitted from the outside through an antenna and outputs the broadcast signal to the OFDM demodulator 102.

The OFDM demodulator 102 OFDM demodulates the broadcast signal output from the tuner 101 and rearranges the frequency deinterleaved OFDM symbols in units of a common interleaved frame (CIF).

The demultiplexer 110 demultiplexes the broadcast stream in the broadcast signal demodulated by the preprocessor 100 and outputs a BIFS command. The MSC demultiplexer 111 and the TS (Transport packet Stream) demultiplexer 112 and MPEG-2 system decoder 113.

The MSC demultiplexer 111 demultiplexes OFDM symbols output by the OFDM demodulator 102 and divides the OFDM symbols into a fast information channel (FIC) symbol and a main service channel (MSC) symbol.

The TS demultiplexer 112 outputs a TS stream by decoding the MSC symbol output by the MSC demultiplexer 111.

The MPEG-2 system decoder 113 demultiplexes the TS stream output from the TS demultiplexer 112 and outputs a BIFS command.

The BIFS decoder 120 decodes the BIFS command output from the MPEG-2 system decoder 113 to form a BIFS tree in the memory 130.

The control unit 140 extracts and sorts and manages identification information and location information of a sensor node included in a predetermined scene from a BIFS tree stored in a memory 130, and manages any one sensor node according to a direction key input from the outside. Select to print its location information.

The image processor 160 overlays the graphic object on the screen area corresponding to the position information output from the controller 140.

The display unit 170 displays graphic objects overlaid by the image processor 160 on the screen.

The display operation of the sensor node according to the present invention will be described with reference to such a configuration. Since the operation of configuring the BIFS tree in the memory 130 is general, a description thereof will be omitted here, and the subsequent operation will be described.

First, among the transform 2D nodes and anchor nodes included in the BIFS tree, the controller 140 displays the screens according to the flag values recorded in the Whichchoice field below each node. Identify the transform 2D and anchor nodes associated with the scene.

Next, identification information and position information of the TouchSensor node located under the transform 2D node identified as related to the scene to be displayed on the screen, identification information of the corresponding anchor node located below the anchor node, Extract location information.

When the identification information and the location information of the sensor nodes included in the scene to be displayed on the screen are extracted, the location information of the extracted sensor nodes is sorted according to the proximity of the preset reference position.

That is, when the identification information and the location information of the sensor nodes are extracted, the distance value between the extracted sensor nodes and the preset reference position are calculated to determine the distance value in the order of decreasing distance, that is, in order of adjoining the preset reference position. The location information of the extracted sensor nodes is sequentially sorted.

For example, the positions of the extracted sensor nodes are set to (x1, y1), (x2, y2), ..., and the reference position is set to (X, Y), which is a position corresponding to the lower left corner of the screen. In this case, the difference between the position of the extracted sensor nodes and the reference position, that is, X-x1, X-x2, ..., Y-y1, Y-y2, ... is calculated and the absolute value of each difference value is obtained. Then, the position information of the sensor node to be displayed on the screen is sequentially sorted in the order of decreasing absolute value on the y axis, and when the absolute values are the same on the y axis, the location information is sorted in the order of decreasing absolute value on the x axis.

As a result, the position information of each sensor node, that is, the touch sensor node and the anchor node included in the scene to be displayed on the screen is sequentially sorted according to the direction moving from the lower side to the upper side and the left to right side on the screen.

When the location information of each sensor node included in the scene to be displayed on the screen is sorted sequentially, the list of preset location information of each sensor node extracted with the corresponding identification information according to the sorted order. Register in (list) to construct sensor node list.

Next, the identification information and the location information of each sensor node registered in the sensor node list are continuously updated whenever the scene changes.

That is, as a result of monitoring and monitoring the flag value recorded in the Witch value field, if the flag value is '0', the sensor node is deleted from the list, and if the flag value is '1', the sensor node is determined as described above. Update by sorting through the list.

On the other hand, if a sensor node is registered in the sensor node list, one of the sensor nodes registered in the sensor node list is selected and its location information is output.

A predetermined flag value indicating that a window is displayed is assigned to the selected sensor node to determine from which sensor node to move from the next direction key input.

For example, among the sensor nodes registered in the list, that is, among the sensor nodes included in the scene currently displayed on the screen, the sensor node having the highest priority is selected and the location information thereof is output.

Then, a predetermined flag value indicating that a window is displayed is assigned to the sensor node having the highest priority selected in order to determine which sensor node should move from the next direction key input.

Meanwhile, when the position information of the selected sensor node is output as described above, the image processor 160 overlays the graphic object on the screen area corresponding to the output position information, and the display unit 170 displays the overlayed graphic object. Since it is displayed on the screen, the user can check what object is associated with a predetermined sensor node in the screen.

In this state, when the direction key is input from the outside according to the user's selection, the sensor node is located for the sensor node to which the flag is assigned, and the sensor node at the position moved in the direction corresponding to the direction key based on the found sensor node. Select to print its location information.

Thus, when the image processor 160 overlays the graphic object on the screen area corresponding to the output position information, and the display unit 170 displays the overlaid graphic object on the screen, the user may change the image object into the screen as desired. The object related to the included sensor node can be checked as a whole.

On the other hand, as described above, when a predetermined sensor node is selected, a flag value indicating that a window is displayed is assigned to the selected sensor node so as to define a sensor node as a reference when the next direction key is input. The flag assigned to the sensor node defaults.

The Witch Choice field shown in FIG. 2 is provided from the outside through the BIFS command according to the conventional MPEG-4 BIFS standard, and is located below the transform 2D node and anchor node in the BIFS tree, and a flag value is recorded. .

The flag value identifies a predetermined transform 2D node and an anchor node as a node related to a scene to be displayed on the screen. The flag value is set externally according to a general MPEG-4 BIFS standard and provided through a BIFS command.

The flag value may be set to values of '-1' and '0' indicating a node related to a scene to be displayed on a screen and a case not indicating the node.

If the flag value is set as described above, it can be seen that the transform 2D node and the anchor node including the Witch Choice field in which the flag value of '-1' is recorded are nodes related to the scene currently displayed on the screen. have.

Then, it can be seen that the transform 2D node and the anchor node including the Witch Choice field in which a flag value of '0' is recorded are nodes that are not related to the scene currently displayed on the screen.

When a predetermined transform 2D node and an anchor node are identified as related to the scene to be displayed on the screen in this manner, the sensor nodes located below the extract are extracted, so that only the sensor nodes related to the scene to be displayed on the screen can be extracted. .

The sensor node shown in FIG. 3 is provided from the outside through the BIFS command according to the conventional MPEG-4 BIFS standard, and is located below the transform 2D node and the anchor node in the BIFS tree.

The identification information DEF of the sensor node distinguishes it from other sensor nodes, and as an example thereof, 'As0' is specified.

Position information of the sensor node is a two-dimensional coordinate value representing a distance moved on the x-axis and y-axis based on a predetermined center coordinate value, and the center coordinate value is an externally provided program map table (PMT). Included).

Here is an example of his' -5. 2 'is specified, which means that the sensor node is located at a position moved by 5 on the x axis to the left and 2 on the y axis to the right with respect to the center value.

The sensor node list according to the present invention shown in FIG. 4 is composed of each identification information, position information of the sensor nodes, and isactive indicating that a window is displayed in the screen area where the sensor node is located.

The sensor nodes comprise a TouchSensor node and an anchor node, and each node is sequentially listed according to a predetermined sorting order, for example, adjacent to a preset reference position. It is registered.

In this case, the sensor nodes are sorted according to the direction moving from the bottom to the top and from the left to the right on the screen, and are sequentially registered in the list.

The sorting shown in FIG. 5 illustrates a sorting according to the present invention as an example, in which the sensor nodes are sequentially arranged according to a degree of proximity to a preset reference position.

The sorting calculates a distance value between the position of each sensor node and a preset reference position, and sequentially sorts the position information of the extracted sensor nodes in an order of decreasing distance value, that is, in an order adjacent to the preset reference position. .

For example, as shown, the positions of each sensor node are (-3, -2), (3, -2), (3, 5), (-3, 5), and the reference position is displayed on the screen. When it is set to (X, Y) which is a position corresponding to the lower left corner, the difference value between the positions of the extracted sensor nodes and the reference position, that is, X-(-3), X- (3), ..., Y Calculate-(-2), Y-(-2), ... and find the absolute value.

The results of the absolute values are in the order of 2, 2, 9, 9 for the X axis and 1, 7, 7, 1 for the Y axis.

Next, the location information of each sensor node is sorted in descending order on the y axis according to the obtained absolute value, and when the absolute values are the same on the y axis, the sorting information is sequentially sorted on the x axis.

As a result, as shown, the sensor nodes included in the scene currently displayed on the screen are sorted sequentially according to the direction moving from the bottom to the top and from the left to the right when viewed on the screen.

IsActive illustrated in FIG. 6 is a flag value for identifying that the sensor node is currently displaying a window in the screen area.

The flag value may be set to a value of '1' and '0' indicating a sensor node displaying a window in a screen area and a case in which the flag is not displayed.

Initially, since the flag values of all the sensor nodes registered in the list are '0', the topmost sensor node is selected by default, the window is overlaid on the screen area corresponding to the location information, and the window is displayed on the sensor node. Assign a flag value of 'ON' to indicate.

As a result, the user can check what object is associated with the sensor node on the screen.

In this state, when the right direction key is input from the outside, the direction key is moved to the right direction corresponding to the input direction key by the number of times that the direction key is input based on the sensor node to which the flag value of 'ON' is assigned on the list. Select the sensor node at one location and overlay the window on the screen area corresponding to the location information.

A flag value of 'ON' indicating that a window is displayed is assigned to the corresponding sensor node, and a flag value of 'OFF' assigned to the uppermost sensor node is defaulted.

As a result, the user may check whether there is an object related to the sensor node located in the screen area corresponding to the right direction key input as desired.

In addition, when the left direction key is input from the outside in such a state, the number of times the direction key is input in the left direction corresponding to the input direction key on the basis of the sensor node to which the flag value of 'ON' is assigned in the list. Select the sensor node of the moved position and overlay the window on the screen area corresponding to the position information.

As a result, the user can check what object is associated with the sensor node located in the screen area corresponding to the left direction key input as desired.

The screen shown in FIG. 7 is provided to show an example of a mode in which the sensor node is moved in accordance with a direction key input from the outside.

As shown in FIG. 7, when a direction key is input from the outside while the window is displayed on the 'U.S' sensor node 700 according to the present invention, the 'US' sensor node 700 is referred to. As a result, a window is displayed on the 'worlds' sensor node 701 at the position moved according to the number of times the direction key is input in the right direction corresponding to the input direction key.

8 is a diagram illustrating a sensor node display method according to the present invention.

In the sensor node display method according to the present invention, first, the BIFS command received from the outside is decoded to construct a BIFS tree, and the presence / absence of the transform 2D node and the anchor node is monitored (S800).

As a result of monitoring, if there is a transform 2D node and an anchor node in the BIFS tree, whether the transform 2D node or anchor node is related to the scene to be displayed on the screen according to the flag value recorded in the Witch value field located under the node. Check (S801).

For example, when the flag value recorded in the Witch Choice field is '0', it can be confirmed that the transform 2D node and the anchor node including the Witch Choice field are nodes related to the scene to be displayed on the screen.

On the other hand, if the flag value recorded in the Witch Choice field is '-1', the transform 2D node and the anchor node including the Witch Choice field may be identified as nodes that are not related to the scene to be displayed on the screen.

Next, identification (DEF) information and position information (translation) of the touch sensor node located under the transform 2D node identified as being related to the scene to be displayed on the screen, or identification information and position information of the anchor node are extracted (S803). .

When the identification information and the location information of the sensor nodes are extracted, the extracted location information of the sensor nodes is sorted according to the proximity of the preset reference position (S804).

That is, when the identification information and the location information of the sensor nodes are extracted, the distance value between the extracted sensor nodes and the preset reference position are calculated to determine the distance value in the order of decreasing distance, that is, in order of adjoining the preset reference position. The location information of the extracted sensor nodes is sequentially sorted.

For example, the positions of the extracted sensor nodes are set to (x1, y1), (x2, y2), ..., and the reference position is set to (X, Y), which is a position corresponding to the lower left corner of the screen. In this case, the difference value between the extracted sensor nodes and the reference position, that is, X-x1, X-x2, ..., Y-y1, Y-y2, ... is calculated and the absolute value of the difference value is calculated. Obtain and sort the position information of the touch sensor node and the anchor node according to their absolute values in order of decreasing difference value based on the y axis, and if the difference value is the same on the y axis, the difference value is small based on the x axis. Sort them sequentially.

As a result, the position information of each sensor node, that is, the touch sensor node and the anchor node included in the scene to be displayed on the screen is sequentially sorted according to the direction moving from the lower side to the upper side and the left to right side on the screen.

When the location information of each sensor node, that is, the touch sensor node and the anchor node, included in the scene to be displayed on the screen is sequentially sorted, the location information of the extracted sensor nodes is listed along with the identification information according to the sorted order. The sensor node list is configured by registering at (S805).

Meanwhile, the identification information and the location information of each sensor node registered in the sensor node list are continuously updated whenever the scene changes.

That is, as a result of monitoring and monitoring the flag value recorded in the Witch Choice field, if the flag value is '0', the sensor node is deleted from the list, and if the flag value is '1', the sorting of the sensor node is performed. It is updated by registering it in the sensor node list.

Next, one of the sensor nodes registered in the sensor node list is selected according to the direction key input from the outside, and the OSD object is overlaid on the screen area corresponding to the position information, for example, with a small size window.

More specifically, first, among the sensor nodes registered in the list, the sensor node having the highest priority is selected (S806), and a window is displayed in the screen area corresponding to the location information (S807), so that the user has priority on the screen. You can see what objects are related to the sensor node as a reference.

On the other hand, in order to display the window on the screen, when the sensor node having the highest priority is selected first, a flag value indicating that the window is displayed on the current screen is assigned to the first selected sensor node.

Next, when such an operation is completed, when a direction key is input from the outside according to a user's selection (S808), the sensor node assigned the flag value is found and in a direction corresponding to the input direction key based on the sensor node. The sensor node moved by the input number of times is selected (S809).

When a predetermined sensor node is selected, a window is displayed on the screen area corresponding to the position information of the selected sensor node, and a window is displayed on the selected sensor node so as to know a reference position to be moved at the next direction key input. Assign a flag value to indicate that it is present, and default the flag value assigned to the previous sensor node.

According to such an operation, the user can check whether there is an object related to the sensor node displayed on the screen according to the direction key input as desired by the digital multimedia receiver even if the touch screen is not supported.

As described in detail above, in the digital multimedia receiver and its sensor node display method according to the present invention, a user confirms and moves an object related to the sensor node according to a direction key input from an external device in a digital multimedia receiver that does not support a touch screen. And can be specified.

Although the invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

Claims (8)

A preprocessor receiving and demodulating a broadcast signal; A demultiplexer for demultiplexing a broadcast stream within the demodulated broadcast wave and outputting a BIFS (Binary Format for Scene) command; A BIFS decoder configured to decode the BIFS command output by the demultiplexer to form a BIFS tree; A memory for storing the BIFS tree configured by the BIFS decoder; The sensor node list is constructed by extracting and sorting identification information and position information of the sensor node included in a predetermined scene from the BIFS tree stored in the memory, and constructing the sensor node list according to a direction key input from the outside. A control unit which selects any one and outputs its location information; An image processor overlaying a graphic object on a screen area corresponding to the position information output from the controller; And And a display unit for displaying a graphic object overlaid by the image processor on a screen. Finding sensor nodes included in a scene to be displayed on a screen in a predetermined BIFS tree and extracting respective identification information and location information; Constructing a sensor node list by sorting the extracted location information and identification information of each sensor node according to the location information; When a direction key is input from the outside, selecting one of the sensor nodes constituting the sensor node list by moving the number of times input in the direction corresponding to the input direction key; And displaying a graphic object in a screen area corresponding to the position information of the selected sensor node. The method of claim 2, The extracting step, Constructing a BIFS tree with a BIFS command provided through a broadcast signal; And a first extraction step of extracting identification information and location information of sensor nodes located below each transform 2D node and anchor node in the configured BIFS tree. The method of claim 3, wherein The first extraction step, The identification information and location information of the sensor node are selectively extracted according to the flag value recorded in the Witch Choice field under each transform 2D node and anchor node in the configured BIFS tree. How to display sensor nodes. The method of claim 2, After the displaying step, When the direction key is input from the outside, selecting the sensor node of the position moved by the number of times input in the direction corresponding to the input direction key based on the selected sensor node of the digital multimedia receiver How to display sensor nodes. The method of claim 2, The sorting is, Sensor node display method of the digital multimedia receiver, characterized in that the position information of each extracted sensor node is made according to the degree of proximity with a preset reference position. The method of claim 6, The reference position is, Sensor node display method of the digital multimedia receiver, characterized in that any one selected from the four corners of the screen. The method of claim 2, Sensor nodes constituting the sensor node list, A method of displaying a sensor node of a digital multimedia receiver, wherein the scene is updated whenever the scene changes.

Images