US20070035560A1 - Apparatus for providing multiple screens and method of dynamically configuring multiple screens - Google Patents

Apparatus for providing multiple screens and method of dynamically configuring multiple screens Download PDF

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Publication number
US20070035560A1
US20070035560A1 US11/496,544 US49654406A US2007035560A1 US 20070035560 A1 US20070035560 A1 US 20070035560A1 US 49654406 A US49654406 A US 49654406A US 2007035560 A1 US2007035560 A1 US 2007035560A1
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Prior art keywords
screen
logical
screens
display screen
service
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US11/496,544
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English (en)
Inventor
Jong-ho Lee
Kwang-kee Lee
Un-gyo Jung
Glenn Adams
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority to US11/496,544 priority Critical patent/US20070035560A1/en
Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ADAMS, GLENN A., JUNG, UN-GYO, LEE, JONG-HO, LEE, KWANG-KEE
Publication of US20070035560A1 publication Critical patent/US20070035560A1/en
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/14—Display of multiple viewports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H04N21/4314—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for fitting data in a restricted space on the screen, e.g. EPG data in a rectangular grid
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0464—Positioning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/10—Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/12—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/12—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
    • G09G2340/125—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels wherein one of the images is motion video

Definitions

  • Apparatuses and methods consistent with the present invention relate to configuring multiple screens, and more particularly, to dynamically configuring multiple screens which provide multiple contents on a single physical display device.
  • TVs digital televisions
  • digital set-top boxes provide only one content element on a single physical display device or simultaneously display a main screen and a sub-screen on a single physical display device.
  • Content sources include a broadcast service such as a satellite broadcaster, a terrestrial broadcaster, or a cable broadcaster, a storage medium such as digital versatile discs (DVD)s, or an external device connected to an input terminal.
  • a broadcast service such as a satellite broadcaster, a terrestrial broadcaster, or a cable broadcaster
  • a storage medium such as digital versatile discs (DVD)s
  • DVD digital versatile discs
  • MHP Multimedia Home Platform
  • ACAP Advanced Common Application
  • OCAP Open Cable Application Platform
  • HAVi Home Audio/Video Interoperability
  • UI user interface
  • the present invention provides a dynamic configuration of multiple screens which provide a plurality of contents on a physical display device.
  • an apparatus for providing multiple screens includes a digital signal processing module receiving video information, audio information, or data information and restoring a service based on the video information, the audio information or the data information, a service processing module producing a plurality of logical screens for displaying the restored service, and an output module mapping the plurality of logical screens provided by the service processing module to different locations on a display screen.
  • the logical screens may have attribute information indicating whether the logical screens are visible on the display screen.
  • an apparatus for providing multiple screens includes a service processing module producing a logical screen displaying a service and a display screen that allows the logical screen to be associated with the service and displays the logical screen, and an output module mapping the produced logical screen to a certain area on the produced display screen.
  • the logical screens may have attribute information indicating whether the logical screens are visible on the display screen.
  • an apparatus for providing multiple screens includes a digital signal processing module receiving video information, audio information, or data information and restoring a service, a service processing module producing logical screens for displaying the restored service, and an output module displaying the logical screens provided by the service processing module on an arbitrary area of a display screen.
  • the logical screens may have attribute information indicating whether the logical screens are visible on the display screen.
  • a method of dynamically configuring multiple screens includes receiving video information, audio information, or data information and restoring a service, producing a plurality of logical screens displaying the restored service, and mapping the logical screens to different locations on a display screen.
  • the logical screens may have attribute information indicating whether the logical screens are visible on the display screen.
  • the method includes producing a plurality of logical screens displaying a service and a display screen displaying the plurality of logical screens, and mapping the logical screens to arbitrary areas on the display screen.
  • the logical screens may have attribute information indicating whether the logical screens are visible on the display screen.
  • FIG. 1A to 1 H are diagrams illustrating configurations of a PiP screen according to exemplary embodiment of the present invention.
  • FIG. 2 is a diagram illustrating the relationship between a logical screen and a display screen according to an exemplary embodiment of the present invention
  • FIG. 3 is a block diagram illustrating service sources according to an exemplary embodiment of the present invention.
  • FIGS. 4A to 4 B are diagrams illustrating a non-abstract service and an abstract service according to an exemplary embodiment of the present invention
  • FIG. 5 is diagrams illustrating attribute information and interfaces of a logical screen and a display screen
  • FIG. 6 is a diagram illustrating an attribute โ€˜z-orderโ€™ of a logical screen according to an exemplary embodiment of the present invention.
  • FIGS. 7A and 7B are diagrams illustrating an attribute โ€˜DisplayAreaโ€™ of a logical screen according to exemplary embodiments of the present invention.
  • FIG. 8 is a diagram illustrating a method of mapping two services to a display screen according to an exemplary embodiment of the present invention.
  • FIG. 9 is a block diagram illustrating a configuration of an apparatus for providing multiple screens according to an exemplary embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a method of dynamically configuring multiple screens according to an exemplary embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a software architecture for providing multiple screens according to an exemplary embodiment of the present invention.
  • FIG. 12 is a diagram illustrating the relationships among modules constituting an application programming interface (API) layer according to an exemplary embodiment of the present invention
  • FIG. 13 is a flowchart illustrating a method of displaying a plurality of services that are displayed on respective corresponding logical screens on a display screen by the modules illustrated in FIG. 12 according to an exemplary embodiment of the present invention.
  • FIG. 14 is a flowchart illustrating a method of exchanging services displayed on logical screens between the modules illustrated in FIG. 12 according to an exemplary embodiment of the present invention.
  • These computer program instructions may also be stored in a computer usable or computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer usable or computer-readable memory produce an article of manufacture including instruction means that implement the function specified in the flowchart block or blocks.
  • the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.
  • Each block of the flowchart illustrations may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order. For example, two blocks illustrated in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
  • service indicates a group of multimedia contents displayed together, i.e., a group of service components.
  • Service components are elements of a service and include a video component, an audio component, and a data component.
  • a data component is an application program in a service.
  • service context indicates an object which can control the executing of a service and includes various resources, devices, and execution state information needed for providing a service.
  • the term โ€˜physical display deviceโ€™ indicates a physical device which actually displays the content of a service, an output port which outputs the content of a service or a storage medium which stores a service.
  • display screen indicates a screen actually displayed on a physical display device.
  • An arbitrary service may be directly set in the display screen, and the display screen may be displayed on a physical display device.
  • at least one logical screen which is mapped to a certain area of the display screen may be displayed on the physical display device.
  • logical screen indicates a space in which an arbitrary service is displayed.
  • a logical screen is a virtual screen before being mapped to a display screen and thus is not displayed on a physical display device.
  • the logical screen and the display screen may be a combination of a background still image, a video raster, and a graphic raster.
  • the graphic raster may be a combination of text, lines, colors, and images or a mixture of video frames.
  • main service indicates a service that is selected as a main service through a menu displayed on the physical display device or a remote controller by a user or through an API by an application, and the screen on which the main service is displayed is referred to as a โ€˜main screenโ€™.
  • PiP service indicates a service that is selected as a sub-service in the main service through a menu displayed on a physical display device or a remote controller by a user or via an API by an application, and the PiP service may be displayed on a picture-in-picture screen (PiP screen) or a main screen.
  • the PiP screen includes a screen that occupies a part of another screen as illustrated in FIGS. 1A to 1 D and a screen that is simultaneously displayed with another screen without overlapping the other screen as illustrated in FIGS. 1E to 1 F.
  • the PiP screen may include a screen that is displayed on an arbitrary location or area in the physical display device or overlaps another screen, as illustrated in FIGS. 1G and 1H .
  • FIG. 2 is a diagram illustrating the relationship between a logical screen and a display screen according to an exemplary embodiment of the present invention.
  • a service may be displayed using logical screens 210 , 212 , and 214 .
  • the logical screens 210 , 212 , and 214 are mapped to display screens 220 , 222 , and 224 through a mapping block 230 .
  • the logical screens 210 and 212 are mapped to the display screen 220
  • the logical screens 212 and 214 are mapped to the display screen 222
  • the logical screens 210 , 212 , and 214 are mapped to the display screen 224 .
  • At least one logical screen which displays a service is mapped to an arbitrary area of a display screen by the mapping block 230 .
  • the mapping block 230 is a group of various pieces of information needed for mapping a logical screen to a display screen. Examples of the various pieces of information include coordinate information of a predetermined area on a display screen to which each of a plurality of logical screens is mapped, identification information of the logical screens and the display screen, and information specifying in what order the logical screens are displayed on the display screen.
  • the mapping block 230 may be realized by interfaces or functions prepared by various computer program languages to be executed and create or change the relationship between the logical screen and the display screen by using the above information as parameters. Also, the mapping block 230 may be realized by a hardware which has a mapping function between a logical screen and a display screen.
  • services provided by various service sources may be displayed on a display screen, and the display screen may be displayed on a physical display device, as illustrated in FIG. 3 .
  • service sources which provide broadcast services such as a terrestrial broadcaster 320 and a cable broadcaster 330 , service sources which provide services stored in a storage medium such as a personal video recorder (PVR) 340 , and service sources (not illustrated in FIG. 3 ) which provide services via a wired network or a wireless network.
  • PVR personal video recorder
  • a broadcast receiver 310 receives services from the service sources and produces logical screens displaying each of the received services.
  • an arbitrary service is directly set on the display screen to be displayed on a physical display device using a predefined method or a method set by a user or an application. Otherwise, at least one logical screen that is mapped to an arbitrary area on the display screen is displayed on a physical display device 350 .
  • services provided by the terrestrial broadcaster 320 , the cable broadcaster 330 , and the PVR are displayed on the physical display device 350 .
  • the terrestrial broadcaster 320 , the cable broadcaster 330 , and the PVR 340 are illustrated in FIG. 3 as being service sources, but the present invention is not limited to it. Any type of multimedia content source which provides multimedia contents that can be displayed together can be a service source according to an exemplary embodiment of the present invention.
  • Services according to an exemplary embodiment of the present invention can be classified into abstract services and non-abstract services, as illustrated in FIGS. 4A and 4B .
  • the abstract services are not services provided by broadcast signals transmitted in real time but services independent of broadcast channels.
  • the abstract services include only data components, i.e., application programs, without video components and audio components. Examples of the abstract services include services having unbound applications based on the OCAP standard.
  • the non-abstract services are understood as services other than abstract services.
  • both abstract services and non-abstract services have independency.
  • abstract services may be directly set on the physical display device not through logical screens and non-abstract services may be displayed on the logical screens.
  • the logical screens may be mapped to the display screen in which the abstract services are set. Thereafter, the display screen may be output through the physical display device.
  • the abstract services can be displayed on the display screen independently of the non-abstract services.
  • the abstract services and non-abstract services may be mapped to different logical screens. Thereafter, the logical screens may be mapped to a single display screen. In other words, the abstract services can be displayed on the display screen independently of non-abstract services.
  • the logical screen and the display screen may be categorized as being different objects.
  • a screen may serve as a logic screen or a display screen according to attribute information of one screen object.
  • a screen object is a logical screen or a display screen depends on the โ€˜typeโ€™ information among screen object attributes.
  • the screen object attributes includes โ€˜Typeโ€™, โ€˜z-Orderโ€™, โ€˜Display_Areaโ€™, โ€˜Visibilityโ€™, โ€˜Associated_Display_Screenโ€™, โ€˜Associated_Service_Contextsโ€™, and โ€˜OutputPortโ€™.
  • FIG. 5 illustrates attribute information of a screen object and interfaces for processing the attributes of the screen.
  • An attribute โ€˜Typeโ€™ 510 is for determining a screen typeโ€”a logical screen or a display screen.
  • An attribute โ€˜z-Orderโ€™ 520 is for determining in what order a plurality of logical screens are arranged along the z-axis.
  • FIG. 6 illustrates a configuration of logical screens on a physical display device for a combination of the values of attributes โ€˜z-Orderโ€™ of the logical screens.
  • first and second logical screens 620 and 630 are respectively mapped to predetermined areas of a display screen 610 .
  • the first logical screen 620 is displayed on the display screen 610
  • the second logical screen 630 is displayed on the display screen partially overlapping the first logical screen 620 .
  • the display screen 610 , the first logical screen 620 , and the second logical screen 630 are sequentially arranged in the direction of the z-axis.
  • an attribute โ€˜z-Orderโ€™ of the first logical screen 620 may be set to a value of 1
  • an attribute โ€˜z-Orderโ€™ of the second logical screen 630 may be set to a value of 2.
  • the attributes โ€˜z-Orderโ€™ of the first and second logical screens 620 and 630 may be set to any numbers or characters as long as they can represent a certain order in which the first and second logical screens 620 and 630 are to be arranged along the z-axis.
  • An attribute โ€˜Display_Areaโ€™ 530 is information regarding a display screen area of a logical screen, as to be illustrated in FIGS. 7A and 7B .
  • FIG. 7A illustrates that a logical screen 710 is mapped to an entire area of the display screen 720
  • FIG. 7B illustrates that a logical screen 730 is mapped to a partial area of the display screen 740 .
  • the attribute โ€˜Display_Areaโ€™ may include information specifying the two-dimensional coordinates of a predetermined portion of a display screen to which the logical screen is to be mapped or may include information specifying a predetermined location on the display screen and an offset value indicating how much the logical screen deviates from the predetermined location on the display screen.
  • An attribute โ€˜Visibilityโ€™ 540 determines whether a logical screen is to be visibly or invisibly displayed on a display screen. It is possible to make a logical screen appear on or disappear from a display screen by altering the value of the attribute โ€˜Visibilityโ€™ 530 .
  • An attribute โ€˜Associated_Display_Screenโ€™ 550 is information regarding display screens associated with a logical screen.
  • a logical screen which is not associated with any display screens may not be displayed on a physical display device nor be transmitted to external output devices.
  • An attribute โ€˜Associated_Service_Contextsโ€™ 560 is information regarding service contexts connected to a logical screen or a display screen. Services set in such service contexts may be displayed on a logical screen or a display screen.
  • An attribute โ€˜OutputPortโ€™ 570 is information regarding devices by which a display screen is to be output, and such devices include display screens, wired/wireless communication media, and various storage media.
  • Interfaces for identifying or altering the values of the attributes illustrated in FIG. 5 may be provided.
  • the interfaces may include an interface โ€˜SETโ€™ for setting attribute values or connecting a logical screen to a display screen, an interface โ€˜ADDโ€™ for adding attribute values or connecting a logical screen to a service, an interface โ€˜GETโ€™ for identifying attribute values, and an interface โ€˜REMOVEโ€™ for deleting attribute values.
  • These interfaces may include processes, functions, procedures, or methods that perform their functions, respectively.
  • a method โ€˜setVisible(boolean visible)โ€™ causes the current logical screen to be visible or invisible.
  • the method โ€˜setVisible(boolean visible)โ€™ is an interface for setting an attribute โ€˜Visibilityโ€™.
  • the parameter โ€˜visibleโ€™ refers to attribute information representing that the current logical screen is visible or invisible on the display screen associated with the current logical screen, and the data type may preferably be a value of boolean visible.
  • An exceptional handling can be conducted if the current screen is not a logical screen or the attribute โ€˜visibilityโ€™ of the current screen cannot be changed due to hardware or software characteristics when performing the method โ€˜setVisible(boolean visible)โ€™.
  • a method โ€˜getVisible(void)โ€™ is an interface for acquiring information of the attribute โ€˜visibilityโ€™ of the current screen.
  • the method โ€˜getVisible(void)โ€™ can determine whether the logical screen is visible on the display screen. If the current screen is a display screen, the display screen may be continuously visible. In contrast, if the current screen is a logical screen, the current screen may be continuously visible or invisible.
  • a return value of the method โ€˜getVisible(void)โ€™ may preferably be Boolean type.
  • an arbitrary service may be displayed or not displayed on the logical screen of a physical display device depending on a user's selection.
  • the user wants to periodically receive the arbitrary service, for example, when a terrestrial broadcasting service is supplied on a first logical screen, and a data broadcasting service relating stock information is supplied on a second logical screen, the information of the attribute โ€˜Visibilityโ€™ of the second logical screen is periodically changed so that the user can receive the stock information at a predetermined period of time while receiving the terrestrial broadcasting service.
  • a method โ€˜getDisplayScreen(void)โ€™ returns a display screen associated with the current screen.
  • the method โ€˜getDisplayScreen(void)โ€™ returns the associated display screen.
  • the method โ€˜getDisplayScreen(void)โ€™ returns reference information regarding the current screen.
  • the method โ€˜getDisplayScreen(void)โ€™ returns a value of โ€˜NULLโ€™.
  • a method โ€˜public void setDisplayArea(HScreenRectangle rect) throws SecurityException, IllegalStateExceptionโ€™ provides a function for mapping the current logical screen to a predetermined area of the associated display screen.
  • An instance that is provided as a parameter is of a class โ€˜HScreenRectangleโ€™ of a package โ€˜org.havi.uiโ€™, and has two dimensional position information.
  • the execution of the methods โ€˜SecurityExceptionโ€™ and โ€˜IllegalStateExceptionโ€™ may be conducted as an exceptional operation for the method โ€˜setDisplayScreen(HScreen screen)โ€™.
  • the method โ€˜IllegalStateExceptionโ€™ may be executed when the current screen is a logical screen or when a portion of a display screen associated with a current logical screen cannot change due to the characteristics of a host platform.
  • a method โ€˜getOutputArea(void)โ€™ returns regional information of a current screen as HScreenRectangle information. If the current screen corresponds to a display screen, the method โ€˜getOutputArea(void)โ€™ returns HScreenRectangle information having the same value as HScreenRectangle (0,0,1,1). If the current screen is a logical screen, the method โ€˜getOutputArea(void)โ€™ returns information regarding an area on a display screen occupied by the current screen. If the current screen is a logical screen but is not associated with any display screen, the method โ€˜getOutputArea(void)โ€™ returns a value โ€˜NULLโ€™.
  • FIG. 8 is a diagram illustrating a process that two services are set on two logical screens to be mapped to a single display screen.
  • a first service includes all the three service components, i.e., video, audio, and data components, and a second service includes only video and audio components.
  • the present invention does not impose any restrictions on service components, and the first and second services illustrated in FIG. 8 are exemplary.
  • the first and second services are displayed on a physical display device in almost the same manner as in the related art. According to the current exemplary embodiment of the present invention, it is possible to display a plurality of services on a physical display device independently of one another without imposing any restrictions on the number of services that can be displayed on a single display screen.
  • FIG. 9 is a block diagram of an apparatus for providing multiple screens according to an exemplary embodiment of the present invention.
  • an apparatus 900 for providing multiple screens includes a digital signal processing module 940 , a service processing module 950 , an output module 960 , and a user/application interface module 965 .
  • the apparatus 900 includes a broadcast signal reception module 910 , a storage medium 920 , and an external input module 930 as service sources, and includes a physical display device 970 , a storage medium 980 , and an external output module 990 as service output media.
  • module means, but is not limited to, a software or hardware component, such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC), which performs certain tasks.
  • a module may advantageously be configured to reside on the addressable storage medium and configured to be executed on one or more processors.
  • a module may include, by way of example, components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
  • components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
  • the functionality provided for in the components and modules may be combined into fewer components and modules or further separated into additional components and modules.
  • the digital signal processing module 940 receives various information of a service such as a multimedia content, e.g., video information, audio information, or data information, from the broadcast signal reception module 910 , the storage medium 920 , or the external input module 930 .
  • a multimedia content e.g., video information, audio information, or data information
  • the broadcast signal reception module 910 receives a satellite, terrestrial, or cable broadcast signal and transmits the received broadcast signal
  • the storage medium 920 stores video information, audio information, or data information of a service
  • the external input module 930 receives video information, audio information, or data information of a service from an external device such as a network interface module connected to a network.
  • the digital signal processing module 940 restores a plurality of services using received service components.
  • the restored services include abstract or non-abstract services.
  • a plurality of services refers to two or more services transmitted by the broadcast signal reception module 910 or two or more services respectively transmitted by the broadcast signal reception module 910 and the storage medium 920 .
  • the digital signal processing module 940 may restore services according to selection by a user or an application with the aid of the user/application interface module 965 .
  • the user or the application may select the connection between an arbitrary service and a screen.
  • the service processing module 950 produces a one or more logical screens and a display screen to display the services restored by the digital signal processing module 940 .
  • the output module 960 maps a plurality of logical screens produced by the service processing module 950 to the display screen.
  • the mapping of the logical screens to the display screen may be conducted using a predefined method or a method set by the user with the aid of the user/application interface module 965 .
  • a service restored by the digital signal processing module 940 may not be processed by the service processing module 950 . Instead, a service restored by the digital signal processing module 940 may be directly mapped to a certain portion of a display screen produced by the output module 960 .
  • a display screen provided by the output module 960 may be displayed on the physical display device 970 or may be stored in the storage medium 980 .
  • Examples of the storage medium 980 include computer readable floppy discs, hard discs, CD-ROM. DVD, DVD-ROM, BD (Blu-ray Disc), and semiconductor memories.
  • a display screen provided by the output module 960 may be transmitted to an external device connected to a network via the external output module 990 .
  • the output module 960 may include a plurality of output ports via which a display screen can be provided.
  • a display screen can be provided via an output port set in advance as a default or an output port chosen by the user with the aid of the user/application interface module 965 .
  • the user or the application can choose one of a plurality of services or restore desired services using the user/application interface module 965 . Also, the user can choose one of a plurality of display screens using the user/application interface module 965 .
  • FIG. 10 is a flowchart illustrating a method of dynamically configuring multiple screens according to an exemplary embodiment of the present invention.
  • video information, audio information, and data information constituting a multimedia content are transmitted in a predetermined format, for example, an MPEG stream format.
  • an apparatus for providing a service such as a multimedia content service receives video information, audio information, and data information and restores a service based on the video information, the audio information, and the data information.
  • the service restored in operation S 1010 may be selected or previously determined by a user or an application.
  • the user may use a menu displayed on the display device or a remote controller to select the connections between an arbitrary screen and a screen.
  • the application may select the connections using an API.
  • data information includes application information regarding application program for a service, and these application information includes signal information indicating whether the application program can be executed on a PiP screen.
  • application information examples include an application information table (AIT) based on the MHP standard and an eXtended application information table (XAIT) based on the OCAP standard.
  • the signal information may be added to the application.
  • the restored service is set such that it can be displayed on a logical screen.
  • the logical screen is mapped to a display screen.
  • the display screen is provided to the user using a display screen, a storage medium, or a network.
  • the restored service is illustrated in FIG. 10 as being displayed on a physical display device via a logical screen. However, the restored service may be directly displayed on a physical display device without passing through the logical screen.
  • the PiP service When the user selects the PiP service, the PiP service is realized in two modes. In the first mode, only video component for PiP service selected on the main screen is provided without creating a separate logical screen for PiP service, that is, PiP screen. In the second mode, a separate logical screen for PiP service is created to provide the PiP service selected on the created PiP screen.
  • FIG. 10 illustrates a method of mapping only one service to a display screen for simplicity. However, a plurality of services may be mapped to a display screen with or without passing through a plurality of logical screens.
  • FIG. 11 is a diagram illustrating a software architecture for providing multiple screens according to an exemplary embodiment of the present invention.
  • a software architecture 1100 includes a device driver layer 1110 , an API layer 1120 , and an application layer 1130 .
  • the device driver layer 1110 receives service components from various multimedia content sources and decodes the received service components. Examples of the received service components include video information, audio information, and data information.
  • the API layer 1120 generates a logical screen and a display screen and maps a service, the logical screen, and the display screen to one another.
  • the application layer 1130 provides a user interface so that a user can dynamically configure a logical screen which displays a service or transmits a user command to the API layer 1120 so that the API layer 1120 can execute the user command.
  • the user enables the device driver layer 1110 with the aid of the application layer 1130 to provide a display screen via a physical display device or to store the display screen in a storage medium.
  • the user can enable the device driver layer 1110 to transmit a display screen to an external device via a network.
  • the device driver layer 1110 may include a plurality of output ports which can provide a display screen.
  • API layer 1120 may include the plurality of output ports.
  • the API layer 1120 may include a plurality of software modules, e.g., a multiscreen manager module โ€˜MultiScreenManagerโ€™ 1210 , a multiscreen context module โ€˜MultiScreenContextโ€™ 1230 , a multiscreen context listener module โ€˜MultiScreenContextListenerโ€™ 1250 , and a multiscreen context event module โ€˜MultiScreenContextEventโ€™ 1240 .
  • a multiscreen manager module โ€˜MultiScreenManagerโ€™ 1210 e.g., a multiscreen manager module โ€˜MultiScreenManagerโ€™ 1210 , a multiscreen context module โ€˜MultiScreenContextโ€™ 1230 , a multiscreen context listener module โ€˜MultiScreenContextListenerโ€™ 1250 , and a multiscreen context event module โ€˜MultiScreenContextEventโ€™ 1240 .
  • the relationship between these modules is illustrated in FIG. 12 .
  • the multiscreen manager module 1210 manages the multiscreen context module 1230 , searches for a desired screen, displays information specifying what devices are shared by screens, registers the multiscreen context listener module 1250 , or cancels the registration of the screen context listener module 1250 .
  • the multiscreen context module 1230 is an interface object associated with a screen object 1220 and determines whether the screen object 1220 is to become a logical screen or a display screen according to an interface operation performed by the multiscreen context module 1230 .
  • Various attributes such as the attributes 510 through 570 illustrated in FIGS. 6A and 6B may be set in the multiscreen context module 1230 .
  • the multiscreen context module 1230 can provide the interfaces โ€˜SETโ€™, โ€˜ADDโ€™, โ€˜GETโ€™, and โ€˜REMOVEโ€™ described above with reference to FIGS. 5 .
  • the multiscreen context event module 1240 serves as an event class announcing that the attribute information of the screen object 1220 has been changed
  • the multiscreen context listener module 1250 serves as a listener interface object which can be realized in a predetermined application class which attempts to receive an event prompted by the multiscreen context event module 1240 .
  • An application 1260 is a module which is driven on the application layer 1130 .
  • the application 1260 allows the user to choose a desired service and to freely arrange a plurality of logical screens on a display screen.
  • the application 1260 transmits various commands which allow the user to dynamically configure and manage logical screens to the multiscreen manager module 1210 , and the multiscreen manager module 1210 controls operations corresponding to the various commands to be executed through the multiscreen context module 1230 .
  • the multiscreen context module 1230 is associated with the screen object 1220 and manages the attribute information of the screen object 1220 illustrated in FIG. 5 .
  • the multiscreen context module 1230 may include a variety of functions or methods.
  • the multiscreen manager module 1210 receives service components provided by various service sources from the device driver layer 1110 and performs operations to display the received service components on a logical screen or a display screen.
  • FIG. 13 is a flowchart illustrating a method of displaying a plurality of services displayed on respective corresponding logical screens by the modules illustrated in FIG. 12 on a display screen according to an exemplary embodiment of the present invention.
  • the multiscreen manager module 1210 produces a display screen and a number of logical screens corresponding to the number of services to be performed.
  • the multiscreen manager module 1210 connects the logical screens to respective corresponding services received from the device driver layer 1110 .
  • the multiscreen manager module 1210 may call a method โ€˜addServiceContextโ€™ for each of the logical screens by setting service context objects of the received services as parameters for the logical screens services.
  • the method โ€˜addServiceContextโ€™ connects a logical screen to a service and may be provided by the multiscreen context module 1230 .
  • the multiscreen manager module 1210 connects the logical screens to the display screen.
  • the multiscreen manager module 1210 may call a method โ€˜setDisplayScreenโ€™ for each of the logical screens by setting a display screen object to which the logical screens are connected as a parameter.
  • the method โ€˜setDisplayScreenโ€™ connects a logical screen to a display screen and may be provided by the multiscreen context module 1230 .
  • a method โ€˜setDisplayScreensetDisplayScreenโ€™ may be set to โ€˜public void setDisplayScreensetDisplayScreen(HScreen screen) throws SecurityException, Illegal StateExceptionโ€™, and this method allows an instance โ€˜HScreenโ€™ that is provided as a parameter to be associated with the current logical screen.
  • the instance โ€˜HScreenโ€™ is preferably a display screen.
  • a parameter of the method โ€˜setDisplayScreen(HScreen screen)โ€™ may include a value of โ€˜NULLโ€™. In this case, when the method โ€˜setDisplayScreen(HScreen screen)โ€™ is executed without exception handling, the current logical screen is no longer associated with the display screen.
  • the method โ€˜IllegalStateExceptionโ€™ may be executed when a current screen is a logical screen or when a portion of a display screen associated with a current logical screen cannot change due to the characteristics of a host platform.
  • FIG. 14 is a flowchart illustrating a method of exchanging services displayed on logical screens between the modules illustrated in FIG. 12 according to an exemplary embodiment of the present invention.
  • the multiscreen manager module 1210 temporarily terminates a service to be exchanged between two logical screens.
  • operation S 1420 information regarding the service is exchanged between the two logical screens.
  • a method โ€˜removeServiceContextโ€™ and a method โ€˜addServiceContextโ€™ are called for each of the two logical screens, thereby exchanging service contexts set in the two logical screens between the two logical screens.
  • the method โ€˜removeContextโ€™ removes a service context connected to a logical screen, and the method โ€˜addServiceContextโ€™ adds a new service context to a logical screen.
  • the methods โ€˜removeServiceContextโ€™ and โ€˜addServiceContextโ€™ may be provided by the multiscreen context module 1230 .
  • service information regarding a service connected to logical services is exchanged between the logical services, thereby obtaining the effect of exchanging a main screen and a sub-screen.
  • service information regarding a service connected to logical services is exchanged between the logical services, thereby obtaining the effect of exchanging a main screen and a sub-screen.
  • operation S 1430 occurrence of an event in which the connection between the service and the two logical screens has been changed is generated. Thereafter, in operation S 1440 , the multiscreen context event module 1240 transmits the event to the multiscreen context listener module 1250 , and a service newly connected to the two logical screens begins to be performed.
  • the present invention it is possible to perform a plurality of services provided by various sources such as cable broadcasts, terrestrial broadcasts, various storage media, and external inputs, in various manners using a single physical display screen.

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US8189108B2 (en) 2012-05-29
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