(19) United States
`(12) Patent Application Publication (10) Pub. No.: US 2013/0057764 A1
`(43) Pub. Date:
`Mar. 7, 2013
`Choi et al.
`
`US 2013 0057764A1
`
`(54) METHOD OF PROVIDING EXTERNAL
`DEVICE LIST AND IMAGE DISPLAY DEVICE
`
`(76) Inventors:
`
`Jinyoung Choi, Seoul (KR); Gowoon
`Choi, Seoul (KR)
`
`(21) Appl. No.:
`
`13/535,735
`
`(22) Filed:
`(30)
`
`Jun. 28, 2012
`Foreign Application Priority Data
`
`Sep. 2, 2011 (KR) ........................ 10-2011-0088863
`
`Publication Classification
`
`(51) Int. Cl.
`(2011.01)
`H04N 5/445
`(52) U.S. Cl. ................................ 348/563; 348/E05.099
`(57)
`ABSTRACT
`Provided area method of providing an external device listand
`an image display device. The method includes: displaying a
`plurality of external device icons connectible to the image
`display device; positioning a pointer on a first external device
`icon among the plurality of external device icons; and dis
`playing on a screen of the image display device an image
`signal of an external device corresponding to the first external
`device icon having the pointer thereon.
`
`
`
`860
`
`820
`
`80
`
`810
`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 1 of 16
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`US 2013/0057764 A1
`
`FIG.1
`p
`Service
`PrOWider
`
`O
`
`COntent
`Provider
`
`3.
`NetWOrk
`PrOV ider
`
`40
`HNED
`(Customer)
`
`1ST TerreStria
`Broadcaster
`
`
`
`2ND TerreStria
`Broadcaster
`
`Satellite
`Broadcaster
`
`War iOUS Internet (--- y
`Broadcaster y
`w
`Or Private CPS v
`
`Yal
`
`EX. 1007
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 2 of 16
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`US 2013/0057764 A1
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`
`
`
`
`
`
`
`
`
`
`
`
`APPLICATION) ( APPLICATION) APPLICATION
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`NETWORK
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`REFERENCE
`b-AT DATA
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`O OBJECT CAROUSEL
`
`EX. 1007
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 3 of 16
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`US 2013/0057764 A1
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`FIG.3
`
`SERVICE
`PROVIDER
`
`
`
`
`
`
`
`MAGE DISPLAY
`DEVICE
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`Servce PrOWider DiSCOVery
`
`NOde
`
`SP Attachment Request
`
`SP Attachment Complete
`PrOWisioning Info
`
`Master S Tables
`
`Virtual Channe|Map Tables
`
`EX. 1007
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 4 of 16
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`US 2013/0057764 A1
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`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`IP packets
`for M tO access
`net WOf
`
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`
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`
`Network J
`Interface
`
`114
`
`13
`
`PSI & (PSIP
`and 1 Of S)
`DeCOder
`
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`TCP
`Manager
`
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`
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`Control
`Manager
`
`Service
`delivery
`Manager
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`DiscOVery
`Manager
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`Manager
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`Metadata DB
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`DeCOder
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`Application
`Manager
`Service
`Manager
`
`User input
`
`
`
`25
`
`MS Gateway
`
`IP packets
`from to access
`network
`
`
`
`EX. 1007
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 5 of 16
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`US 2013/0057764 A1
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`
`
`
`
`EXTERNAL DEVICE
`NTERFACE UNIT
`
`
`
`
`
`CONTROL
`UNT
`
`POWER SUPPLY
`UNIT
`
`190
`
`REMOTE
`CONTROL DEVICE
`
`2OO
`
`EX. 1007
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 6 of 16
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`US 2013/0057764 A1
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`40
`
`f
`
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`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 7 of 16
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`US 2013/0057764 A1
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`
`
`C
`
`Ter
`
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 8 of 16
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`US 2013/0057764 A1
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`
`
`POWER
`SUPPLY UNIT
`
`- - - - -
`
`EX. 1007
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`Patent Application Publication
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`Mar. 7, 2013 Sheet 9 of 16
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`US 2013/0057764 A1
`
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`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 10 of 16
`
`US 2013/0057764 A1
`
`FIG.10
`
`DISPLAY A PLURALITY OF EXTERNAL DEVICE CONS
`
`S700
`
`NO
`
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`POSITIONED ON SPECIFIC
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`END
`
`FIG 11
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`
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`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 11 of 16
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`US 2013/0057764 A1
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`FIG.12 as
`
`
`
`82O
`
`810
`
`2- - - -
`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 12 of 16
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`US 2013/0057764 A1
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`FIG.13
`
`
`
`820
`
`180
`
`810
`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 13 of 16
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`US 2013/0057764 A1
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`
`
`861
`
`860
`
`820
`
`8O
`
`8O
`
`EX. 1007
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`

`Patent Application Publication
`
`Mar. 7, 2013 Sheet 14 of 16
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`US 2013/0057764 A1
`
`
`
`82O
`
`80
`
`810
`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 15 of 16
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`US 2013/0057764 A1
`
`
`
`810
`
`180
`
`IF YOU SELECT PC WEW,
`FULL SCREEN IS SWITCHED TO PC,
`WANT TO SWITCH?
`
`EX. 1007
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`Patent Application Publication
`
`Mar. 7, 2013 Sheet 16 of 16
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`US 2013/0057764 A1
`
`FIG.17
`
`
`
`880
`
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`
`Si
`
`850
`
`810
`
`as
`
`area
`
`EX. 1007
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`US 2013/0057764 A1
`
`Mar. 7, 2013
`
`METHOD OF PROVIDING EXTERNAL
`DEVICE LIST AND IMAGE DISPLAY DEVICE
`
`CROSS-REFERENCE TO RELATED
`APPLICATIONS
`0001. The present application claims priority under 35
`U.S.C. 119 and 35 U.S.C. 365 to Korean Patent Application
`No. 10-2011-0088863 (filed on Sep. 2, 2011), which is
`hereby incorporated by reference in its entirety.
`
`BACKGROUND
`0002 The present invention relates to an image display
`device, and more particularly, to a method for providing a list
`of external devices thereof.
`0003 Recently, digital TV services using a wire or wire
`less communication network are becoming more common.
`The digital TV services provide various services that typical
`analog broadcasting services cannot provide.
`0004 For example, an Internet Protocol Television (IPTV)
`service (i.e., one type of the digital TV services) provides
`interaction through which a user may actively select kinds of
`watching programs and watching time. The IPTV service
`may provide various additional services such as internet
`search, home shopping, and online game on the basis of the
`interaction.
`
`SUMMARY
`0005 Embodiments provide a method of providing an
`external device list, which allows a user to recognize an input
`Switch in advance before an image signal of an external
`device, which is applied to an image display device, is
`Switched for input, and an image display device thereof.
`0006. In one embodiment, a method of providing an exter
`nal device list to an image display device includes: displaying
`a plurality of external device icons connectible to the image
`display device; positioning a pointer on a first external device
`icon among the plurality of external device icons; and dis
`playing on a screen of the image display device an image
`signal of an external device corresponding to the first external
`device icon having the pointer thereon.
`0007. In another embodiment, an image display device
`includes: a display unit displaying a plurality of external
`device icons connectible to the image display device; and a
`control unit performing a control to display an image signal of
`an external device corresponding to a first external device
`icon having a pointer thereon when the pointer is positioned
`on the first external device icon among the plurality of exter
`nal device icons.
`0008. The details of one or more embodiments are set
`forth in the accompanying drawings and the description
`below. Other features will be apparent from the description
`and drawings, and from the claims.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`0009 FIG. 1 is a view illustrating a configuration of a
`broadcast system according to an embodiment.
`0010 FIG. 2 is a view illustrating a configuration of a
`broadcast system according to another embodiment.
`0011
`FIG. 3 is a view illustrating a method for transmit
`ting/receiving data between an image display device and a
`service provider according to an embodiment.
`0012 FIG. 4 is a block diagram illustrating a configuration
`of an image display device according to an embodiment.
`
`0013 FIG. 5 is a block diagram illustrating a configuration
`ofan image display device according to another embodiment.
`0014 FIG. 6 is a view illustrating a platform structure of
`an image display device according to embodiments.
`0015 FIG. 7 is a view illustrating a method of controlling
`an operation of an image display device by using a remote
`control device according to an embodiment.
`0016 FIG. 8 is a block diagram illustrating a configuration
`of a remote control device according to an embodiment.
`0017 FIG. 9 is a view illustrating a configuration of a
`home screen displayed on an image display device according
`to an embodiment.
`0018 FIG. 10 is a flowchart illustrating a method of pro
`viding an external device list according to a first embodiment.
`(0019 FIGS. 11 to 17 are views illustrating a screen that
`provides an external device list of an image display device
`according to the first embodiment.
`
`DETAILED DESCRIPTION OF THE
`EMBODIMENTS
`0020. Hereinafter, a method for providing an external
`device list and an image display device thereof will be
`described in more detail with reference to the accompanying
`drawings.
`0021. The image display device as an intelligent image
`display device having a computer Supporting function in
`addition to a broadcasting receiving function further includes
`an internet function besides a Solid broadcasting receiving
`function so that it may have an easy to use interface such as a
`handwriting input device, a touch screen, or a space remote
`controller. Moreover, after accessing internet and a computer
`with a wire or wireless internet Supporting function, a func
`tion for e-mail, web browsing, banking, or game may be
`available. For Such various functions, a standardized general
`OS may be used.
`0022. Accordingly, the image display device according to
`an embodiment may perform user-friendly various functions
`because a variety of applications may be freely added or
`deleted on a general OS kernel. The image display device may
`be a network TV. HBBTV, and a smart TV, for a specific
`example, and may be applied to a Smartphone, if necessary.
`0023. Furthermore, although embodiments of the present
`invention will be described with reference to the accompany
`ing drawings and contents therein, the present invention is not
`limited thereto.
`0024. The terms used in this specification are selected
`from currently widely used general terms in consideration of
`functions of the present invention, but may vary according to
`the intentions or practices of those skilled in the art or the
`advent of new technology. Additionally, in certain cases, there
`may be terms that an applicant may arbitrarily select, and in
`this case, their meanings are described below. Accordingly,
`the terms used in this specification should be interpreted on
`the basis of substantial implications that the terms have and
`the contents across this specification not the simple names of
`the terms
`0025 FIG. 1 is a view illustrating a configuration of a
`broadcasting system, that is, a schematic view illustrating an
`entire broadcasting system including an image display device
`according to an embodiment.
`0026 Referring to FIG. 1, the broadcasting system
`includes a Content Provider (CP) 10, a Service Provider (SP)
`20, a Network Provider (NP)30 and a Home Network End
`User (HNED) 40.
`
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`0027. The HNED 40 may correspond to a client 100, i.e.,
`the image display device according to an embodiment, and
`for example, the client 100 may be a networkTV, a smartTV.
`and an IPTV.
`0028 Moreover, the CP 10 manufactures and provides
`various contents. As shown in FIG. 1, the CP 10 may be a
`terrestrial broadcaster, a cable System Operator (SO), a Mul
`tiple System Operator (MSO), a satellite broadcaster, or an
`Internet broadcaster.
`0029. Additionally, the CP 10 may provide various appli
`cations besides the broadcast contents. This will be described
`in more detail later.
`0030. The SP 20 may package contents that the CP 10
`provides, and provides the packaged contents as services. For
`example, the SP 20 may package first terrestrial broadcast,
`second terrestrial broadcast, cable MSO, satellite broadcast,
`various internet broadcasts, and applications, and then, pro
`vide them to a user.
`0031) Moreover, the SP 20 may provide services to the
`client 100 through a unicast or multicast method.
`0032. The unicast method is a 1:1 data transmission
`method between one transmitter and one receiver. For
`example, in the case of the unicast method, when a receiver
`requests data to a server, the server transmits the requested
`data to the receiver in response to the request.
`0033. The multicast method is to transmit data to a plural
`ity of receivers in a specific group. For example, a server may
`transmit data to a plurality of pre-registered receivers simul
`taneously. In order for such a multicast registration, an Inter
`net Group Management Protocol (IGMP) may be used.
`0034. The NP 30 may provide a network to provide the
`service to the client 100, and the client 100 may establish a
`Home Network End User (HNED) to receive the service.
`0035 Conditional Access or Content Protection may be
`used as a means to protect contents transmitted from the
`system. As examples of the Conditional Access or Content
`Protection, methods such as CableCARD and Downloadable
`Conditional Access System (DCAS) may be used.
`0036 Moreover, it is possible for the client 100 to provide
`contents via a network. In this case, the client 100 may
`become a CP, and the CP 10 may receive contents from the
`client 100. Accordingly, a bidirectional contents service or
`data service may be available.
`0037 According to an embodiment, the CP 10 may pro
`vide a network service such as a Social Network Site (SNS),
`a blog, a micro blog, or an instant messenger.
`0038. For example, the CP 10 providing the SNS service
`may include a server (not shown) storing various kinds of
`contents such as texts or uploaded images that a plurality of
`users create in the SNS.
`0039. In more detail, a user accesses the server of the CP
`10 providing the SNS service by using an image display
`device, and designates accounts that the user wants, so that
`the user may confirm messages created by the plurality of the
`designated accounts.
`0040. Additionally, if a user requests the SNS service, an
`image display device, i.e., the client 100, accesses the server
`of the CP10 in order to receive the messages of the designated
`accounts, and then, displays the received messages sequen
`tially in order of a corresponding message created, for
`example, displays them in a top to bottom direction.
`0041
`Referring to FIG. 2, the image display device 100
`corresponding to the client of FIG. 1 may be connected to a
`broadcasting network and internet network.
`
`0042. For example, the image display device 100 may
`include abroadcast interface 101, a section filter 102, an AIT
`filter 103, an application data processor 104, a broadcast data
`processor 105, a media player 106, an internet protocol pro
`cessor 107, an internet interface 108, and a runtime module
`109.
`0043 Moreover, the broadcast interface 101 of the image
`display device 100 may receive Application Information
`Table (AIT) data, real time broadcast content, application
`data or a stream event. The real time broadcast content may be
`Linear A/V Content.
`0044) The section filter 102 performs section filtering on
`four data received through the broadcast interface 101 in
`order to transmit AIT data into the AIT filter 102, linear A/V
`content into the broadcast data processor 105, and stream
`event and application data into the application data processor
`104.
`0045. The internet interface 108 may receive Non-Linear
`A/V content and application data. For example, the Non
`Linear A/V content may be Content On Demand (COD)
`application.
`0046. Furthermore, the Non-Linear A/V content may be
`transmitted to the media player 106, and the application data
`may be transmitted to the runtime module 109.
`0047. Additionally, the runtime module 109 may include
`an application manager and a browser. The application man
`ager may control a life cycle on interactive application by
`using AIT data, and the browser may display and process the
`interactive application
`0048 FIG. 3 is a view illustrating a method for transmit
`ting/receiving data between an image display device and a SP
`according to an embodiment.
`0049 Referring to FIG. 3, the SP performs a service pro
`vider discovery operation in operation S301. The image dis
`play device transmits a SP Attachment Request signal in
`operation S302. Once the SP attachment is completed, the
`image display device receives provisioning information in
`operation S303. Furthermore, the image display device
`receives a master SI table from the SP in operation S304, a
`Virtual Channel Map table in operation S305, a Virtual Chan
`nel Description table in operation S306, and a Source table in
`operation S307.
`0050 For example, the service provider discovery opera
`tion may refer to a process that SPs providing IPTV related
`services search for a server that provides information on the
`services that the SPs provide.
`0051. A method of searching for an address list that helps
`receiving information on a Service Discovery (SD) server, for
`example, SP discovery information, may be the following
`three methods. First, an address preset in an image display
`device or an address manually set by a user may be used.
`Second, a DHCP based SP discovery method may be used.
`Third, a DNSSRV-based SP discovery method may be used.
`0.052 Moreover, the image display device accesses a
`server having an address obtained by one of the three methods
`in order to receive a service provider discovery record that
`contains information necessary for service discovery for each
`SP, and performs a service search operation by using the
`received service provider discovery record. Moreover, the
`above processes may be available in a push mode or a pull
`mode.
`0053. Furthermore, the image display device accesses a
`SPattachment server designated as a SPattachment locator of
`
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`a SP discovery record, and performs a registration procedure
`(or a service attachment procedure).
`0054 Moreover, the image display device accesses an
`authentication service server of the SP designated as the SP
`authentication locator to performan additional authentication
`procedure, and then, performs a service authentication pro
`cedure.
`0055. After the service attachment procedure is success
`ful, data transmitted from the server to the image display
`device may have a form of a provisioning information table.
`0056. During the service attachment operation, the image
`display device includes its ID and position information in data
`that are transmitted to the server, and a service attachment
`server may specify a service that the image display device
`subscribes on the basis of the data.
`0057 Address information used for obtaining Service
`Information that the image display device wants to receive
`may be provided in a form of the provisioning information
`table. In addition, the address information may correspond to
`access information on the master SI table. In this case, pro
`viding a customized service for each Subscriber may be easy.
`0058 Moreover, the Service Information may include a
`master SI table record for managing access information on a
`virtual channel map and its version, a virtual channel map
`table for providing a service list in a package form, a virtual
`channel description table including detailed information of
`each channel, and a source table including access information
`for accessing an actual service.
`0059 FIG. 4 is a block diagram illustrating a configuration
`of an image display device according to an embodiment.
`0060 Referring to FIG. 4, the image display device 100
`includes an Network Interface 111, a TCP/IP Manager 112, a
`Service Delivery Manager 113, a Demux 115, a PSI&(PSIP
`and/or SI) decoder 114, an Audio Decoder 116, a Video
`Decoder 117, a Display A/V and OSD Module 118, a Service
`Control Manager 119, a Service Discovery Manager 120, a
`Metadata Manager 122, an SI&MetadataDB 121, a UI man
`ager 124, and a service manager 123.
`0061. The network interface 111 receives or transmits
`packets from or to a network. That is, the network interface
`unit 111 may receive services and contents from a SP via a
`network.
`0062. The TCP/IP manager 112 may be involved in deliv
`ering packets from a source to a destination, which are
`received and transmitted by the image display device 100.
`Moreover, the TCP/IP manager 112 classifies the received
`packets in order correspond to a proper protocol, and outputs
`the classified packets into the service delivery manager 113,
`the service discovery manager 120, the service control man
`ager 119, and the metadata manager 122.
`0063 Additionally, the service delivery manager 113 is
`responsible for controlling the received service data. For
`example, when the service delivery manager 113 controls
`real-time streaming data, RTP/RTCP may be used.
`0064. When the real-time streaming data are transmitted
`using the RTP, the service delivery manager 113 parses the
`received data packet according to the RTP and transmits the
`parsed data to the Demux 115, or stores the received data
`packet in the SI&Metadata DB 121. Moreover, the service
`delivery manager 113 may feedback the network reception
`information to a server that provides services by using the
`RTCP
`0065. The Demux 115 demultiplexes the received packet
`into audio, video, and Program Specific Information (PSI)
`
`data in order to transmit them into the audio/video decoders
`116 and 117 and the PSI&(PSIP and/or SI) Decoder 114.
`0066. The PSI&(PSIP and/or SI) Decoder 114 may
`decode service information such as PSI, and for example,
`may receive a PSI section, a Program and Service Information
`Protocol (PSIP) section, or a Service Information (SI) section
`demultiplexed in the Demux 115 in order to decode them.
`0067 Moreover, the PSI&(PSIP and/or SI) Decoder 114
`may decode the received sections to create a database for
`service information, and the service information may be
`Stored in the SI&Metadata DB 121.
`0068. The audio/video decoders 116 and 117 may decode
`vide data and audio data received from the Demux 115, and
`the decoded audio and video data may be provided to a user
`through the Display A/V and OSD Module 118.
`0069. Moreover, the UI manager 124 and the service man
`ager 123 may manage an overall status of the image display
`device 100, provide a user interface, and mange another man
`ager.
`0070 For example, the UI manager 124 provides a
`Graphic User Interface (GUI) for a user through an OnScreen
`Display (OSD), and receives a key input from a user in order
`to perform an operation of a receiver according to the key
`input. Moreover, when receiving a key input signal for a
`channel selection from a user, the UI manager 124 may trans
`mit the key input signal to the service manager 123.
`0071. The service manager 123 may control a service
`related manager Such as the service delivery manager 113, the
`service discovery manager 120, the service control manager
`119, and the metadata manager 122.
`0072 Additionally, the service manager 123 creates a
`channel map, and selects a channel by using the channel map
`according to a key input received from the UI manager 124.
`0073 And, the service manager 123 receives service
`information on a channel from the PSI&(PSIP and/or SI)
`Decoder 114, and sets audio/video Packet Identifier (PID) of
`the selected channel in the Demux 115.
`0074 The service discovery manager 120 provides infor
`mation necessary for selectings SP that provides service. For
`example, on receiving a signal on channel selection from the
`service manager 123, the service discovery manager 120 may
`find a service by using the received signal.
`(0075 Moreover, the service control manager 119 is
`responsible for service selection and control. For example,
`when a user selects a Live Broadcasting service like a typical
`broadcasting method, IGMP or RTSP is used. When a service
`such as Video On Demand (VOD) is selected, RTSP is used
`for service selection and control.
`(0076. The RTSP protocol provides a trick mode with
`respect to real-time streaming. The service control manager
`119 may initialize and manage a section passing through an
`IMC gateway by using an IP Multimedia Subsystem (IMS)
`and a Session Initiation Protocol (SIP).
`0077. The metadata manager 122 manages service related
`metadata and stores the metadata in the SI&Metadata DB
`121.
`(0078 And, the SI&Metadata DB121 may store the service
`information decoded by the PSI&(PSIP and/or SI) Decoder
`114, the metadata that the metadata manager 122 manages,
`and the information necessary for selecting a SP that the
`service discovery manager 120 provides.
`(0079. Furthermore, the SI&Metadata DB 121 may store
`setup data on a system, and for example, may be implemented
`using NonVolatile RAM (NVRAM) or flash memory.
`
`EX. 1007
`LG Electronics, Inc. / Page 20 of 29
`
`

`

`US 2013/0057764 A1
`
`Mar. 7, 2013
`
`0080 Additionally, an IG 750 may be a gateway including
`functions necessary for accessing an IMS based IPTV ser
`vice.
`0081 FIG.5 is a block diagram illustrating a configuration
`of an image display device according to another embodiment.
`I0082 Referring to FIG. 5, the image display device 100
`may include a broadcast receiving unit 130, an external
`device interface unit 135, a storage unit 140, a user input
`interface unit 150, a control unit 170, a display unit 180, an
`audio output unit 185, and a power supply unit 190. More
`over, the broadcast receiving unit 130 may include a tuner
`131, a demodulation unit 132, and a network interface unit
`133.
`0083. The tuner 131 may select a channel selected by a
`user among Radio Frequency (RF) broadcast signals received
`through an antenna, or an RF broadcast signal corresponding
`to all pre-stored channels, and may convert the selected RF
`broadcast signal into an intermediate frequency signal or a
`baseband image or sound signal.
`I0084. For example, the tuner 131 converts the selected RF
`broadcast signal into a digital IF signal DIF if it is a digital
`broadcast signal, or into an analog baseband image or Sound
`signal CVBS/SIF if it is an analog broadcast signal.
`0085 That is, the tuner 131 may process both a digital
`broadcast signal and an analog broadcast signal, and the
`analog baseband image or sound signal CVBS/SIF outputted
`from the tuner 131 may be directly inputted to the control unit
`170.
`I0086) Moreover, the tuner 131 may receive an RF broad
`cast signal of a single carrier according to the Advanced
`Television System Committee (ATSC) format or an RF
`broadcast signal of a plurality of carriers according to the
`Digital Video Broadcasting (DVB) format.
`0087 Furthermore, the tuner 131 may sequentially select
`RF broadcast signals of all broadcast channels stored through
`a channel memory function from RF broadcast signals
`received through an antenna, and then, may convert the
`selected RF broadcast signals into an intermediate frequency
`signal or a baseband image or sound signal.
`0088. The demodulation unit 132 may receive the digital
`IF signal DIF converted by the tuner 131, and then, may
`perform a demodulation operation thereon. For example, if
`the digital IF signal outputted from the tuner 131 is the ATSC
`format, the demodulator 132 may perform an 8-Vestigal Side
`Band (8-VSB) demodulation.
`0089 Additionally, the demodulation unit 132 may per
`form channel decoding, and for this, may include a Trellis
`Decoder, a De-interleaver, and a Reed Solomon Decoder to
`perform Trellis decoding, de-interleaving, and Reed Solomon
`decoding.
`0090. For example, if the digital IF signal outputted from
`the tuner 131 is the DVB format, the demodulation unit 132
`may perform Coded Orthogonal Frequency Division Modu
`lation (COFDMA) modulation.
`0091 Additionally, the demodulation unit 132 may per
`form channel decoding, and for this, may include a convolu
`tion decoder, a De-interleaver, and a Reed Solomon Decoder
`to perform convolutional decoding, de-interleaving, and
`Reed Solomon decoding.
`0092. The demodulation unit 132 may output a stream
`signal TS after performing demodulation and channel decod
`ing, and the stream signal may be a signal into which an image
`signal, Sound signal, or a data signal is multiplexed.
`
`0093. For example, the stream signal may be an MPEG-2
`Transport Stream (TS) into which an MPEG-2 standard
`image signal and a Dolby AC-3 standard Sound signal are
`multiplexed. In more detail, the MPEG-2 TS may include a 4
`byte header and a 184 byte payload.
`0094 Furthermore, the demodulation unit 132 may
`include an ATSC demodulation unit and a DVB demodulation
`unit separately according to the ATSC format and the DVB
`format.
`0.095 The stream signal outputted from the demodulation
`unit 132 may be inputted to the control unit 170. The control
`unit 180 may output an image to the display unit 180 and a
`sound to the audio output unit 185 after demultiplexing and
`processing an image/sound signal.
`0096. The external device interface unit 135 may connect
`an external device with the image display device 100, and for
`this, may include an A/V input/output unit (not shown) or a
`wireless communication unit (not shown).
`(0097. The external device interface unit 135 may be used
`for wire/wireless connection of an external device Such as a
`Digital Versatile Disk (DVD) player, a Bluray player, a game
`console, a camera, a camcorder, and a computer (such as a
`notebook computer).
`0098. Moreover, the external device interface unit 135
`may deliver an image, Sound, or data signal inputted from a
`connected external into the control unit 170 of the image
`display device 100, and may output the image, Sound, or data
`signal processed in the control unit 170 into the connected
`external device.
`(0099. The A/V input/output unit may include a USB ter
`minal, a Composite Video Banking Sync (CVBS) terminal, a
`component terminal, an S-Video terminal (i.e., an analog
`type), a Digital Visual Interface (DVI) terminal, a High Defi
`nition Multimedia Interface (HDMI) terminal, an RGB ter
`minal, and a D-SUB terminal, in order to input an image and
`Sound signal of an external device into the image display
`device 100.
`0100 Furthermore, the wireless communication unit may
`perform a short-range wireless communication with another
`electronic device. For example, the image display device 100
`and another electronic device may be connected to a network
`through communication standards such as Bluetooth, Radio
`Frequency Identification (RFID), infrared Data Association
`(IrDA), Ultra Wideband (UWB), ZigBee, and Digital Living
`Network Alliance (DLNA).
`0101 Moreover, the external device interface unit 135 is
`connected to various set top boxes through at least one of the
`above various terminals in order to perform an input/output
`o