KR101395444B1 - Wireless controlling system and method of digital tv - Google Patents

Abstract

The present invention relates to a wireless control system and method for a digital TV capable of wirelessly controlling a digital TV with a notebook PC. The present invention is equipped with a wireless communication unit using the same communication protocol for a notebook PC and a digital TV. The wireless communication unit scans the periphery of the notebook PC and selects a specific digital TV when a predetermined key operation occurs to control the digital TV. When the digital TV is determined, the authentication process is performed as a prerequisite for controlling the notebook PC. To this end, the digital TV has an authentication code generator. A comparison unit for comparing the authentication code generated by the authentication code generation unit with an input code input from the notebook PC; and a display unit for displaying a function command of the digital TV transmitted from the notebook PC And a control unit for controlling the corresponding function to be executed according to the code. The image information stored in the notebook PC as well as the function command code may be viewed on the digital TV according to the transmission bandwidth of the wireless communication unit. In addition, the authentication code is provided in combination with various symbols / letters / numbers that can be input through a mouse / touch pad / touch screen in addition to a character code that can be input only on a keyboard. Accordingly, the present invention can wirelessly control a digital TV using a terminal equipped with a wireless communication unit.

 Notebook PC, wireless communication module, digital TV, authentication code, digital TV detection.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless control system and method for a digital TV,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TV radio control method, and more particularly, to a TV radio control system and method in which a digital TV (D-TV) is controlled wirelessly using a portable device having a built-in wireless communication protocol.

The number of RF channels is much larger than that of conventional analog broadcasting, and it is possible to transmit a plurality of programs in a limited transmission bandwidth of one RF channel. That is, according to the United States Advanced Television System Committee (ATSC) standard, even one RF channel corresponding to one channel of a conventional analog system can broadcast at least one HD program and six sub channels of a maximum SD program simultaneously It is recommended to be able to.

That is, digital broadcasting refers to broadcasting in which a TV signal is compressed and transmitted in a digital form in which information signals are encoded and recorded, and digital TV is a television receiver that receives and displays the digital broadcasting.

As a method of watching using the digital TV, there is a method of directly operating various key buttons mounted on the digital TV or using a dedicated remote controller for digital TV.

In addition to the function of displaying digital broadcasting, various additional functions are added to the digital TV in accordance with the trend of digitalization and upgrading of external devices. For example, a composite product that combines functions of a personal computer (PC) such as a web page search or a graphic user environment as well as a simple TV function is being released.

A wireless keyboard for remotely controlling a digital TV with a PC is provided in the composite product.

A digital TV control process using the wireless keyboard will be described with reference to FIG. FIG. 1 shows a system configuration diagram for explaining a method of controlling a digital TV using a wireless keyboard.

1, the wireless keyboard 1 includes function keys 10 for remotely controlling the digital TV 20 (i.e., a TV viewing button, a PC viewing button, a channel adjusting button +/-, a volume adjusting button +/-, etc.) are provided.

Thus, when one of the function keys 10 is selected, the receiving unit 22 of the digital TV 20 receives a HID (human interface device) value for the radio code signal of the operated key. The receiving unit 22 is connected to the PC unit 24 of the digital TV 20 via a USB interface and the HID value is transmitted to the application program unit (TPCM) 26 of the PC unit 24.

When the application program unit 26 transmits the HID value to the TV unit 28 through the serial communication, the TV unit 28 controls the HID value to perform a function corresponding to the HID value.

As described above, when the digital TV 20 is a digital TV 20 as a composite product in which the dedicated remote controller is used or the PC unit 24 is incorporated, a wireless keyboard 1 is used to control the TV function .

However, the remote control using the wireless keyboard 1 is not applicable to a digital TV having only a single TV function, and is limitedly applied to a product in which a TV function and a PC function are organically combined. Further, since each component (TV part, PC part) for providing the TV function and the PC function can communicate only with the serial cable, there is a restriction that can not be used for general purpose.

That is, when a digital TV can be wirelessly controlled instead of a dedicated remote controller, there is a problem that the product to be applied is limited as described above.

Accordingly, it is an object of the present invention to provide a digital TV radio control system and a method thereof for remotely controlling a TV using a portable device having a wireless communication protocol.

Another object of the present invention is to transmit various image information to a TV in addition to simple command transmission so that the TV can process the same.

According to an aspect of the present invention, there is provided a portable device including a portable device and a TV capable of embodying the same wireless communication protocol and capable of short range wireless communication, the portable device comprising: Detects one or more TVs located within a predetermined range, and transmits a function command code to be executed to the TV when the normal authentication with the TV is completed; Displays an authentication code on an authentication request of the portable device, compares an input code transmitted from the portable device with an authentication code, and executes the function command code according to the comparison result.

Wherein the portable device comprises: a sensing unit for sensing the TV; An input unit for inputting a code for an authentication code displayed on the screen for authentication with the detected TV; And a device controller for controlling the function command code to be transmitted through a wireless communication protocol to remotely control the TV function when the authentication is normally performed.

The sensing unit allows a TV having the largest signal strength to be selected when the TV has at least two TVs.

The sensing unit senses only the TV having the same product name when the TV is sensed.

Wherein the TV comprises: an authentication code generation unit for generating an authentication code when a connection request is made in the portable device; A display unit for displaying the generated authentication code on a screen; A comparing unit comparing the authentication code with an input code transmitted from the portable device; If the comparison result indicates that the authentication code matches the input code, the connection with the portable device is normally performed. If one function command code is transmitted while checking the function command code generated in the portable device, the corresponding function is performed And a TV control unit for controlling the TV.

Communication between the portable device and the TV uses a wireless communication protocol capable of short-range wireless communication.

The wireless communication protocol includes any one of infrared communication (IrDA), Bluetooth, Zig-Bee, WiBri, binary CDMA (Code devised multiple access), and UWB (Ultra wideband).

The device control unit transmits image information according to the wireless communication protocol, and the TV control unit controls the display of the transmitted image information.

According to another aspect of the present invention, there is provided a portable communication device including a portable device and a TV capable of embodying the same wireless communication protocol and capable of short range wireless communication, There is provided a D-TV radio control system capable of remote control so that, when a process is normally performed, video information of various formats stored in the portable device can be displayed while being displayed on the TV screen.

According to another aspect of the present invention, there is provided a method of controlling a portable device, the method comprising: detecting at least one TV by scanning within a predetermined range according to a predetermined wireless communication protocol; Requesting a connection with the detected TV; When the connection request is generated, the TV displays the generated authentication code on the screen; Comparing the authentication code with an input code transmitted from the portable device; If the authentication code and the input code match, the TV checks whether or not an instruction code is generated in the portable device, and performs a corresponding function when the instruction code is generated.

If two or more TVs are detected in the detecting step, the TV having the largest signal strength is selected.

Preferably, the detecting step detects a unique product name stored in the TV as basic information.

According to the D-TV wireless control system and method of the present invention having the above-described configuration, in the state where the wireless communication protocol is installed in the D-TV and the portable terminal, -TV can be remotely controlled.

Accordingly, even when a portable terminal such as a notebook PC is used while watching D-TV, it is possible to easily control the D-TV using only the portable terminal.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital TV radio control system and method according to the present invention will be described in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 2 is a block diagram of a digital TV and a notebook PC that wirelessly controls the digital TV according to an embodiment of the present invention.

The notebook PC 100 applied to the embodiment of FIG. 2 generally uses a nondirectional radio frequency and transmits data at a speed of 1 Mbps at a distance of 10 m to 100 m (when the output is high) ) Is built in. In addition, the digital TV 120 is also equipped with a Bluetooth module 122, which is a communication module having the same protocol.

The notebook PC 100 is provided with a configuration for remotely controlling the digital TV to the general PC function.

The notebook PC 100 is provided with a function button for remotely controlling the digital TV 120. The function buttons can perform various functions of the TV such as a TV connection button 110, a channel adjustment button +/-, and a volume adjustment button +/-. These function buttons are in the form of special keys capable of executing the functions of the digital TV 120 in addition to the basic keys of the keyboard 116. [ And has a function of scanning all the digital TVs located within a range that can be executed by the Bluetooth module 111 when the TV connection button 110 is operated.

The Bluetooth module 111 detects the presence of a digital TV within a predetermined range on the basis of the Bluetooth system as described above. At this time, the digital TV sensing operation senses based on the product model name and the like that the digital TV has as basic information . That is, when the Bluetooth module 111 is operated, the surrounding digital TV 120 is scanned on the basis of the notebook PC 100, and only a specific digital TV set in advance is detected based on the product model name. Therefore, digital TVs of the same product model name all have the same scan data. The scan data are provided with different signal intensities according to the distance from the notebook PC 100. [ Therefore, when there are two or more digital TVs of the same product scanned, the digital TV having the highest signal strength is selected.

When the one digital TV 120 is selected, an authentication request unit 112 for authenticating the digital TV 120 is provided as a prerequisite for remotely controlling the digital TV 120. The authentication request unit 112 is implemented by inputting the same code using the keyboard 116 and transmitting the authentication code to the digital TV 120 for display on the digital TV 120. [

A PC controller (not shown) for controlling the function module 120 to transmit a command code for a function command code, for example, a function button operation for a channel adjustment, a volume control, etc., to the digital TV 120 based on the Bluetooth module 111 114 are provided.

Reference numeral 116 denotes a keyboard, and reference numeral 118 denotes a display unit.

The following digital TV has the following configuration.

The Bluetooth module 122 is also mounted on the digital TV 120.

An authentication code generation unit 124 for randomly generating an authentication code so as to be wirelessly controllable by the notebook PC 100 and displaying the authentication code on the display unit 125, And an OSD display unit 126 for displaying the generated authentication code on the display unit 125 in the form of an OSD when the screen is displayed.

The comparison unit 128 compares the authentication code displayed on the screen with the input code input from the notebook PC 100 and transmitted through the Bluetooth module 111 (122).

When the comparison result of the comparison unit 128 indicates that the authentication is normal and the authentication is normal, the TV control unit 130 receives the command code signal for the function button operation of the notebook PC 100 and controls the corresponding function do. The TV control unit 130 continuously checks that the function button operation occurs in the notebook PC 100 when the authentication is normal. The functions corresponding to the code signals include channel switching, volume control, and the like of the digital TV 120. On the other hand, if the authentication fails, the TV control unit 130 displays a screen or voice guidance so that the user can confirm that the remote control can not be performed by using the notebook PC 100.

3 and 4, a process of remotely controlling the digital TV using the notebook PC will be described. FIG. 3 is a flowchart showing a remote control process of the digital TV in the notebook PC according to the configuration of FIG. 2. FIG. 4 is a diagram illustrating an example of a process of generating an authentication code and a code input process in the notebook PC according to the configuration of FIG. Are shown.

In this embodiment, it is assumed that the notebook PC 100 is 'XNOTE' manufactured by LG Electronics and the digital TV 120 is 'XCANVAS' manufactured by LG Electronics. That is, when 'XNOTE' is scanned, only a digital TV having a specific model name of 'XCANVAS' is detected.

When the user is using the notebook PC 100 while watching the digital TV 120 in step S150 and wants to control the digital TV 120 using the notebook PC 100 S152), the PC control unit 114 monitors whether the operation of the TV connection button 110 is performed by the user.

Once the TV connection button 110 is operated in step S154, the PC control unit 114 recognizes that the user desires to control the digital TV 120 and notifies all of the digital devices within the available range of the Bluetooth module 111 Scan. At this time, the Bluetooth module 111 does not detect all the digital devices in the scan operation, but only detects digital TVs having a predetermined digital device, that is, a specific product model name (e.g., 'XCANVAS') (S156).

At this time, if there are a plurality of digital TVs having the same product model name, the Bluetooth module 111 selects the digital TV having the largest signal strength detected from the digital TVs. The strength of the signal strength is greatest in the signal strength of the digital TV located closest to the notebook PC 100.

One digital TV 120 located around the notebook PC 100 is sensed according to the sensing operation. Then, the PC control unit 114 transmits a connection request signal to the digital TV 120 in order to set a control path with the sensed digital TV 120. The Bluetooth module 122 of the digital TV 100 applies the connection request signal to the TV controller 130 (S158).

The TV control unit 130 recognizes that the notebook PC 100 is about to try to connect at present and displays the authentication code generated by the authentication code generating unit 124 on the display unit 125 on the screen 4). The authentication code may be a formulated code according to a predetermined rule, or a randomly generated code. The authentication code corresponds to all the codes that can be input from the keyboard 116 of the current notebook PC 100 so that a screen-displayed authentication code such as Arabic numerals, alphabets, and special characters can be input. The authentication code is a combination of characters / numbers that can be input on the keyboard 116. [

When the authentication code is displayed on the screen, the user of the notebook PC 100 inputs the authentication code displayed on the screen using the keyboard 116 (see (2) in FIG. 4). The input code is transmitted from the notebook PC 100 to the digital TV 120 through the Bluetooth modules 111 and 122 (S162) (see (3) in FIG. 4).

When the input code is transmitted to the digital TV 120, the comparison unit 128 compares the input code with the authentication code displayed on the screen (S164). If the authentication code and the input code coincide with each other as a result of the comparison, the TV control unit 130 maintains the wireless controllable standby mode (S166). The standby mode is a state in which the function button is operated in the notebook PC 100 to continuously check that a function command code is generated.

When the function command code is generated in the notebook PC 100, the TV control unit 130 controls to perform a function corresponding to the transmitted command code (S168). For example, if the command code for controlling the volume is set, the volume of the digital TV is adjusted to +/-.

Of course, it is also possible to control the power off / on state of the digital TV 120 in the notebook PC 100. If the power off button is operated while the notebook PC 100 is connected to the digital TV 120, the TV control unit 130 receives the command code for the power off button and controls the power off.

The power-on control operation is also possible when the power outlet of the digital TV 120 is connected. That is, in this case, the digital TV 120 is not in a state where the power supply is completely cut off but is in a standby state and a small amount of power is supplied. Therefore, the notebook PC 100 uses the Bluetooth module 111, 120). Although the authentication procedure with the digital TV 120 is performed, since the digital TV 120 is currently turned off, the authentication procedure is omitted in this case. In other words, authentication is omitted at power-on.

Thus, once the digital TV 120 is detected and a power on command is generated in the notebook PC 110, the TV control unit 130 of the digital TV 120 controls the power to be turned on according to the power on command.

In addition to performing the wireless control using the keyboard 116 of the notebook PC 100 as described above, the mouse and the touch pad, which are another input device mounted on the notebook PC 100, and the touch screen itself Can be applied.

Will be described with reference to FIG. FIG. 5 shows a digital TV and a notebook PC for wirelessly controlling the digital TV according to another embodiment of the present invention.

Here, only a wireless control process using a mouse will be described. In this case, since the overall configuration and control process of the above-described notebook computer and digital TV are the same, only different contents will be described in order to avoid redundant description.

5, an icon 206 for wireless control or a physically equipped TV connection button 208 is displayed on the screen menu of the notebook PC 200 and a button 206 for physically connecting the icon 206 and the TV connection button 208 A control program 212 for wirelessly controlling the digital TV 120 is provided. The control program 212 supports function buttons 204 for wirelessly controlling the digital TV 120 in the form of a graphical user interface (GUI) so that the user can easily select the function buttons 204.

The display unit 202 displays various function buttons 204 for executing a digital TV function. The icon 206 is also displayed on the display unit 202.

When the control program 212 is displayed on the screen, the mouse 216 is mounted as an input medium for easily selecting the function of the digital TV 120.

Reference numeral 210 denotes a PC control unit, 214 is a Bluetooth module, and 215 is a keyboard.

Next, the configuration of the digital TV 230 is described. The digital TV 230 is provided with the authentication code generating section 222 alone different from the function in the above-described embodiment. That is, the authentication code generation unit 222 can generate not only all the codes that can be input by the keyboard 215 at the time of generating the authentication code but also mouse / touch pad, all shapes / symbols / symbols that the user can directly input on the touch screen have. For example, although a code that can be input by the keyboard 215 has already been determined, the range of authentication codes that can be generated can be expanded because a mouse / touch pad / touch screen can also input figures / symbols / symbols.

Next, a digital TV radio control process in the system of FIG. 5 will be described with reference to FIG.

The PC control unit 210 monitors whether the icon 206 displayed on the display unit 202 of the notebook PC 200 is executed or the TV connection button 208 is executed. When the icon 206 or the TV connection button 208 is executed, the PC control unit 210 accesses the previously stored control program 212 and displays it on the display unit 202. [

Next, the Bluetooth module 214 of the notebook PC 200 scans within a predetermined range and detects whether there is a digital TV having a predetermined product model name. At this time, if there are plural digital TVs, the digital TV having the highest signal strength is detected.

As a result of the detection, one digital TV 230 is selected.

If the connection request signal is transmitted to the digital TV 230 in order to wirelessly control the selected digital TV 230, the TV control unit 228 recognizes that there is a connection request in the digital TV 230, And displays the authentication code generated by the authentication code generation unit 222 on the screen (see (1) in Fig. 6).

At this time, all the characters that can be input by operating the mouse 216 are accepted as the authentication code. For example, in the case of using the keyboard 215, only characters provided in the keyboard 215 can be input, but the mouse 216 can easily input any character in the input menu by the user. Therefore, a code such as '?' Can be generated as shown in FIG. Here, it is assumed that the 'Σ' code can not be input using the keyboard 215.

A mouse 216 is used in the notebook PC 200 to input a code (see (2) in Fig. 6). When entering the code, the 'Σ' code is not input using the keyboard 215. The mouse 216 is used to draw and input a '?' Code. A keyboard inputting number (for example, '867') is input using the keyboard 215.

The PC control unit 210 transmits the input code 'Σ876' to the digital TV 230 using the Bluetooth module 214 or 220 (see ③ of FIG. 6).

The comparison unit 226 of the digital TV 230 compares the authentication code with the transmitted input code.

If the authentication code and the input code coincide with each other as a result of the comparison, the TV control unit 228 continuously checks whether or not the function command code is generated in the notebook PC 200. If the function command code is generated, Is performed.

Meanwhile, in the above-described embodiment, only a simple command code is transmitted to control the digital TV 230 wirelessly. That is, due to the characteristics of the Bluetooth communication module, the ISM band of 2.45 GHz is used, so that only the above-mentioned command code can be transmitted.

However, if a wireless communication module having a larger transmission bandwidth than the Bluetooth communication module, that is, an ultra wideband (UWB) is used, not only the command code but also various image information stored in the notebook PC 200 can be transmitted to the digital TV 230 Do. Since the UWB uses the frequency band of the < RTI ID = 0.0 > GHz < / RTI > width, data transmission is possible at a rate of 100 to 500M per second.

When the UWB communication module is installed in the notebook PC 200 and the digital TV 230, the UWB communication module transmits the image information stored in the notebook PC 200 to the digital TV 230 while watching the digital TV 230, (230).

This process will be described with reference to the flowchart of the image information control process shown in FIG. In describing Fig. 7, the configuration of Fig. 5 will be described with reference to Fig.

7 is a flowchart illustrating a process of transmitting image information stored in a notebook PC to a digital TV and displaying the image information according to another embodiment of the present invention.

In operation 300, when the notebook PC 200 is to be used to control the digital TV 230, the operation of the digital TV 230 is performed in operation 154.

However, when it is desired to transmit video information in step 302 without controlling the function of the digital TV 230 in step 300, it is first determined whether the video information can be transmitted from the notebook PC 200 to the digital PC 230 do. That is, the transmission bandwidth of the wireless communication module installed in the notebook PC 200 and the digital PC 230 may not be sufficient enough to transmit image information.

Thus, in step 304, the type of the wireless communication unit capable of transmitting the image information is confirmed. If the wireless communication unit can transmit the image information, the authentication of the notebook PC 200 and the digital TV 230 is performed in step 308. On the other hand, in step 304, if the wireless communication unit can not transmit image information, another wireless communication unit is selected.

After the authentication is normally performed in operation 308, the image information to be transmitted is selected in operation 310 and the digital TV 230 is transmitted from the notebook PC 200 by the transmission protocol of the wireless communication unit (i.e., UWB system) Lt; / RTI >

In step 312, the TV control unit 228 of the digital TV 230 displays the transmitted image information on the display unit 231. [ The screen display can be performed in various formats such as a still image and a moving image, and can be displayed in various ways by various image-related programs installed in the notebook PC 200.

As described above, the present invention can wirelessly control various functions of a digital TV using a notebook PC. It can be seen that the image information stored in the notebook PC can be displayed on the digital TV according to the transmission bandwidth of the wireless communication protocol applied to the notebook PC and the digital TV.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and alternative constructions without departing from the spirit and scope of the invention. It will be apparent that other, alternative and equivalent embodiments are possible. Therefore, the true scope of the present invention should be determined by the technical idea of the appended claims.

1 is a system configuration diagram for explaining a method of controlling a digital TV using a wireless keyboard.

FIG. 2 is a general view showing a digital TV and a notebook PC that wirelessly controls the digital TV according to an embodiment of the present invention. FIG.

3 is a flowchart showing a process of remotely controlling a digital TV using the notebook PC according to the configuration of FIG.

FIG. 4 is an exemplary screen for generating an authentication code and entering codes in the notebook PC according to the configuration of FIG. 2;

FIG. 5 is a general view showing a digital TV and a notebook PC that wirelessly controls the digital TV according to another embodiment of the present invention. FIG.

FIG. 6 is an exemplary screen for generating an authentication code and entering codes in the notebook PC according to the configuration of FIG. 5;

FIG. 7 is a flowchart illustrating a process of transmitting image information stored in a notebook PC to a digital TV according to another embodiment of the present invention; FIG.

Description of the Related Art [0002]

100: Notebook PC 111: Bluetooth Module for PC

112: authentication request unit 114: PC control unit

120: Digital TV 122: Bluetooth module for TV

124: authentication code generation unit 128: comparison unit

130: TV control unit

Claims (15)

A portable device and a TV capable of embodying the same wireless communication protocol and capable of short range wireless communication, The portable device includes a sensing unit for sensing one or more TVs located within a predetermined range, an input unit for inputting a code for authentication with the sensed TV, and an input unit for controlling whether the sensing unit operates or not, And transmits the function command code of the TV to the TV via the wireless communication protocol after the connection, The TV includes an authentication code generation unit for generating an authentication code for the authentication request signal, a display unit for displaying the authentication code generated by the authentication code generation unit on the screen, a comparison unit for comparing the authentication code with an input code transmitted from the portable device And a controller for controlling whether or not the portable terminal is normally connected to the portable device according to the comparison result of the comparison section and controlling the function command code to be transmitted in the portable non- Control system. delete The method according to claim 1, Wherein the sensing unit selects a TV having the largest signal strength when the TV is detected when the TV is at least two or more. The method according to claim 1, Wherein the detecting unit detects only the TV having the same product name at the time of detecting the TV. delete The method according to claim 1, Wherein the authentication code generator is a code generated by combining one or more characters / numbers / symbols or characters / numbers / symbols that can be input from a keyboard. The method according to claim 1, Wherein the authentication code generation unit is a combination of at least one character / number / symbol or a character / number / symbol that can be expressed using a mouse. The method according to claim 1, Wherein the communication between the portable device and the TV uses a wireless communication protocol capable of short-range wireless communication. 9. The method of claim 8, The wireless communication protocol may include any one of infrared communication (IrDA), Bluetooth, Zig-Bee, WiBri, binary CDMA (code devised multiple access), and UWB Features a D-TV wireless control system. The D-TV radio control system according to claim 1, wherein, when the portable bidirectional authentication and the TV mutual authentication process are normally performed, the video information stored in the portable device can be displayed on the TV screen. The mobile device scanning within a predetermined range by a predetermined wireless communication protocol to detect one or more TVs; Requesting a connection with the detected TV; When the connection request is generated, the TV generates an authentication code and displays the generated authentication code on the screen. Comparing the authentication code with an input code transmitted from the portable device; And, And if the authentication code matches the input code, the TV checks whether or not the command code is generated in the portable device, and if the command code is generated, performing the corresponding function. 12. The method of claim 11, Wherein the TV signal having the largest signal strength is selected when two or more TVs are detected in the detecting step. 12. The method of claim 11, Wherein the detecting step detects a unique product name stored as basic information in the TV. 12. The method of claim 11, Wherein the authentication code can be input using a keyboard or input using a mouse / touch pad / touch screen. 12. The method of claim 11, Wherein the wireless communication protocol is a wireless communication protocol capable of short-range wireless communication, and the portable device can transmit a function command code to image information to a TV according to a transmission bandwidth of the wireless communication protocol .

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