KR101626161B1 - Power saving method, transmitting apparatus, receiving apparatus and displaying apparatus thereof - Google Patents

Abstract

The present invention relates to a power saving method in a transmission / reception system using a wireless network, the method comprising: receiving a power off request; Transmitting a power off request to a transmitting device; Switching a wireless LAN mode to an Ad-hoc mode; And entering the low power mode after being connected to the transmitting device in the Ad-hoc mode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low power operation method, a transmitting and receiving apparatus using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a method and apparatus for transmitting / receiving a signal, and more particularly, to a method and apparatus for transmitting / receiving a media signal using wireless communication.

In general, the display device is constituted by a broadcast receiving unit for receiving and processing a media signal from an airwave, a cable and other external devices (VCR, DVD, etc.), and a display unit for displaying an image of the processed media signal on the screen .

Meanwhile, the broadcast receiving unit and the display unit may be separately configured separately, and in recent years, a wireless communication method has been proposed in which a received media signal is transmitted to a display device using wireless communication and displayed using a separate receiving device A display system is provided.

It is an object of the present invention to provide a method for efficiently performing low-power operation in a transmission / reception system using a wireless network, and a transceiver and a display device using the same.

A low power operation method according to an exemplary embodiment of the present invention is performed in an apparatus for receiving a media signal from a transmitting apparatus connected to a wireless network, the method comprising: receiving a power off request; Transmitting the power off request to the transmitting device; Switching a wireless LAN mode to an Ad-hoc mode; And entering into a power saving mode after being connected to the transmitter in the Ad-hoc mode.

A low power operation method according to another embodiment of the present invention is performed in an apparatus for transmitting a media signal to a receiving apparatus connected to a wireless network, the method comprising: receiving a power off request from the receiving apparatus; Switching a wireless LAN mode to an Ad-hoc mode; And entering a low power mode after being connected to the receiving device in the Ad-hoc mode.

A receiving apparatus according to an embodiment of the present invention includes: an RF transmitting and receiving unit for receiving a signal from the transmitting apparatus; And a controller for switching the wireless LAN mode from the AP mode to the Ad-hoc mode in response to a power-off request and controlling the RF transceiver to enter a low power mode after being connected to the transmitter, wherein the RF transceiver is powered off The request is forwarded to the sending device.

A transmitting apparatus according to an exemplary embodiment of the present invention includes an RF transmitting and receiving unit transmitting a signal to the receiving apparatus and receiving a power off request from the receiving apparatus; And a controller for switching the wireless LAN mode from the AP mode to the Ad-hoc mode in response to the power-off request reception and controlling the RF transceiver to enter the low power mode after being connected to the receiver.

A display device according to an embodiment of the present invention includes the receiving device.

In addition, the low-power operation method may be implemented by a computer-readable recording medium on which a program for execution by a computer is recorded.

According to the embodiment of the present invention, the transmitting apparatus and the receiving apparatus are synchronized through the message transmission and are switched to the Ad-hoc mode, and then enter the power saving mode, so that the low power operation of the transmitting / , Thereby reducing the power consumption of the wireless transmit / receive system.

Hereinafter, a low power operation method according to an embodiment of the present invention, a transceiver using the same, and a display device will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an embodiment of the configuration of a signal transmission / reception system. The signal transmission / reception system may include a transmission apparatus 100 and a reception apparatus 200. FIG.

Referring to FIG. 1, a transmitting apparatus 100 receives a media signal including an image from an airwave, a cable, or an external device, converts the received media signal into data capable of being wirelessly transmitted, do.

The receiving apparatus 200 receives and processes data wirelessly transmitted from the transmitting apparatus 100 and transmits at least one wireless communication standard for transmitting and receiving data wirelessly between the transmitting apparatus 100 and the receiving apparatus 200 And may be set in advance.

The transmitting apparatus 100 includes a high-definition multimedia interface (HDMI) terminal, a universal serial bus (USB) terminal, a component terminal, an external input terminal, an RGB terminal, A cable terminal, and the like, so that the media signal can be received using the input terminal.

The transmitting apparatus 100 may be a set-top box (STB) for receiving a media signal using a wired or wireless network, converting the received media signal, and wirelessly transmitting the received media signal to the receiving apparatus 200.

However, the transmitting apparatus 100 according to the present invention is not limited to a set top box (STB), and may include any type of apparatus capable of receiving media signals transmitted from the outside and wirelessly transmitting the media signals to the receiving apparatus 200 .

For example, the transmitting apparatus 100 according to the present invention may be implemented in a portable terminal such as a computer or a mobile phone.

In addition, the receiving apparatus 200 may receive and process data wirelessly transmitted from the transmitting apparatus 100, and then transmit the image or audio included in the media signal to an external apparatus that outputs the received signal.

For example, the receiving apparatus 200 can convert a video signal wirelessly transmitted from the transmitting apparatus 100 into a form that can be displayed on a display device (not shown), and output the video signal. More specifically, when a video signal wirelessly transmitted from the transmission apparatus 100 is encoded by a coding scheme such as MPEG (MPEG) or the like, the reception apparatus 200 decodes the received video signal, And output it to a display device (not shown).

The transmitting apparatus 100 and the receiving apparatus 200 may be connected to various wireless communication standards such as Wi-Fi (Wireless HD), Wireless Home Digital Interface (WHDi), or WiFi Media signals can be transmitted and received using communication standards.

The WiHD uses a frequency band of about 60 GHz and can transmit / receive data at a transmission rate of about 4 Gbps, so that transmission can be performed without compressing HD video data of 1080p (1920 × 1080). However, since the WiHD uses a high frequency in the 60 GHz band, the data transmission / reception distance is about 10 m, and transmission / reception quality can be easily affected by surrounding obstacles in the installation space.

The WHDi can transmit and receive data at a transmission rate of about 1.8 Gbps using a frequency band of about 5 GHz. In addition, since the WHDi uses a relatively low frequency band of 5 GHz, the transmission / reception distance is about 30 m, and transmission / reception quality may not be significantly affected by peripheral obstacles in the installation space. On the other hand, when the HD video data of 1080p (1920x1080) is to be transmitted using the WHDI according to the transmission rate of about 1.8Gbps, the transmitting apparatus 100 needs to compress and transmit the HD video data partially.

In addition, the WiFi can transmit and receive data at a transmission rate of about 54 Mbp using the frequency band of 2.4 GHz. Since the WiFi uses a low frequency band of 2.4 GHz, the transmission / reception distance is about 50 to 200 m, and transmission / reception quality may be hardly affected by surrounding obstacles in the installation space. On the other hand, when the HD video data of 1080p (1920x1080) is to be transmitted using the WiFi in accordance with the low transmission rate of about 54Mbps, the transmission apparatus 100 compresses and transmits the HD video data, Picture quality deterioration may occur in the video signal received by the receiving apparatus 200. [

The transmitting apparatus 100 and the receiving apparatus 200 may transmit various short range wireless communication standards such as Blutooth, ZigBee, or binary Code Division Multiple Access (CDMA) ) Can be wirelessly transmitted and received according to a media signal.

According to the embodiment of the present invention, the transmitting apparatus 100 and the receiving apparatus 200 can transmit and receive video and audio data using any one of various wireless communication standards as described above.

The transmitting apparatus 100 and the receiving apparatus 200 may transmit and receive video and audio data using two or more of the above-described wireless communication standards. For example, Any one of two or more standards that can be supported may be selected and used for data transmission and reception according to performance, installation environment, resolution of an image, and the like.

According to an embodiment of the present invention, the transmitting apparatus 100 and the receiving apparatus 200 can transmit and receive data in real time using HD (Wideband), UWB, and IEEE 802.11N wireless home network technologies according to a wireless HDMI or wireless HD solution. (1080i or higher) can be transmitted and received. For example, the transmitting apparatus 100 can convert HDMI, which is a standard of HD video transmission, into a wireless packet and transmit it to the receiving apparatus 200.

More specifically, in the case of the IEEE 802.11N-based wireless communication method, the bandwidth that can be transmitted is at most 600 Mbps, which is smaller than uncompressed HD video data of 1 Gbps or more, so that an image compression technique may be required.

Meanwhile, when the wireless HD solution is attached to the receiving apparatus 200, the transmitting apparatus 100 and the receiving apparatus 200 must be able to communicate in a standby state. Otherwise, a separate remote control receiver is required for each of the transmission apparatus 100 and the reception apparatus 200, which increases the cost and troublesome operation of the remote controller by the user twice or more for the hot mode of the apparatus . Therefore, it is preferable to wake up another apparatus with a remote control signal received from any one of the transmitting apparatus 100 and the receiving apparatus 200. [

However, while the transmitting apparatus 100 and the receiving apparatus 200 are in the standby mode, the wireless transmitting unit and the receiving unit included therein must also operate in a power saving mode (PS mode). Otherwise, there is a problem that the power consumption increases and it is difficult to keep the environmental regulation, and the price of the electric power supply device rises.

Therefore, according to the embodiment of the present invention, when receiving a power off request from a user, the receiving apparatus 200 receiving the request transmits a power off request to the transmitting apparatus 100, 100 and the receiving apparatus 200 to enter the low power mode (PS mode).

FIG. 2 is a block diagram illustrating a configuration of a transmitting apparatus according to an embodiment of the present invention. The transmitting apparatus 100 includes an interface unit 110, a first signal processing unit 120, a first control unit 130, And a first RF transmitting and receiving unit 140.

2, the interface unit 110 receives a media signal from an external device, and tuner (not shown) for selecting and receiving a signal corresponding to a broadcast channel selected by a user from among a data stream transmitted to the outside through an antenna or a cable (Not shown), or an input terminal such as an HDMI, a USB, a component, or an RGB for receiving a signal connected to an external device.

The first signal processing unit 120 may convert the signal received by the interface unit 110 into data of a form capable of wireless transmission according to a predetermined wireless communication standard and output the data.

For example, the first signal processing unit 120 includes a data processing unit (not shown) for extracting service information from a data stream inputted through the interface unit 110 and separating various channel information therefrom, And an AV processing unit (not shown) for decoding the video and audio data extracted from the video and audio data.

The first RF transmitting and receiving unit 140 wirelessly transmits the signal output from the first signal processing unit 120 to the receiving apparatus 200. For this purpose, the RF transceiver unit 120 may include an antenna (not shown) and a converter (not shown), for example, an up converter and a down converter.

The first control unit 130 controls the operation of the reception apparatus 100 as a whole and transmits a signal input through the interface unit 110 to the reception apparatus 200 via the first RF transmission / To be transmitted.

According to an embodiment of the present invention, the first signal processing unit 120, the first control unit 130, and the first RF transmission / reception unit 140 may be configured as a wireless transmitter included in the transmission apparatus 100, The wireless transmitter can receive AV data to be transmitted to the receiving apparatus 200 using Low Voltage Differential Signaling (LVDS) or Transition Minimized Differential Signaling (TMDS).

Meanwhile, the wireless signal transmission and reception performed by the first RF transceiver 140 can be divided into an AP mode and an Ad-hoc mode according to a wireless LAN mode.

The Ad-hoc mode is a basic unit of a wireless LAN, and may be a peer-to-peer scheme in which devices communicate with each other in an equal manner without an access point (AP).

The communicable area is referred to as a BSS (Basic Service Set). The Ad-hoc mode is also referred to as a BSS mode as a suitable method when a small-sized wireless LAN is constructed by one BSS.

In the AP mode, one BSS is configured as an access point (AP) and a wireless device, and an ESS (Extended Service Set) configured to connect a plurality of BSSs by connecting the access points (AP) And is therefore also referred to as the IBSS mode.

The wireless transmitter included in the transmitting apparatus 100 may be provided to be able to change the AP mode and the Ad-hoc mode as described above.

Also, in the AP mode, the access point (AP) can not enter a doze state in which packets can not be received, so that the first RF transceiver 140 operating in AP mode can not perform low power operation .

In the case of the Ad-hoc mode, the Node B may be in a dormant state except for an Announcement Traffic Indication Message (ATIM) interval, so that all nodes can perform a power saving operation. The power consumption can be reduced.

On the other hand, when the wireless transmitter operates in the Ad-hoc mode, when a master node transmitting a signal is not fixed and an SSID (Service Set ID) identical to itself is not found in the neighboring area The boot time of the device may be delayed due to the master search time.

In addition, when the transmitting apparatus 100 serves as a gateway for integrating connection with an external apparatus such as a PDA or a notebook using a wireless LAN or DLNA (Digital Living Network Alliance), the external apparatus transmits an Ad- hoc mode may not be supported, so there may be a problem with function expansion.

In addition, in the case of an IEEE 802.11N-based wireless device, the transmission capability may be slightly lowered in the Ad-hoc mode.

Therefore, according to the embodiment of the present invention, the transmitting apparatus 100 is connected to the receiving apparatus 200 in the AP mode, wirelessly transmits the media signal to the receiving apparatus 200, and transmits the Ad- Mode and enter the low-power mode (PS mode).

FIG. 3 is a block diagram illustrating a configuration of a receiving apparatus according to an embodiment of the present invention. The transmitting apparatus 100 includes a second RF transmitting / receiving unit 210, a second signal processing unit 220, 230).

Referring to FIG. 3, the second RF transceiver 210 may receive a signal from a transmitting apparatus 100 connected to a network using a wireless communication standard such as a wireless network, for example, WiHD, WHDi, or WiFi.

The second signal processing unit 220 processes the signal received through the second RF transmitting / receiving unit 210 and outputs the processed signal. For example, when the received image data is data encoded by a specific coding scheme, for example, an MPEG (MPEG) coding scheme, the second signal processing unit 220 decodes the received image data in a displayable form And output it.

The second controller 230 controls the overall operation of the receiver 200. For example, when the signal received through the second RF transmitter / receiver 210 is converted into a displayable form, the second controller 230 converts the received signal into a display module (not shown) The second signal processing unit 220 can be controlled.

As described above, the second RF transmitting / receiving unit 140 included in the receiving apparatus 200 can operate in either the AP mode or the Ad-hoc mode, and the WLAN mode can be switched .

According to an embodiment of the present invention, the receiving apparatus 200 is connected to the transmitting apparatus 100 in the AP mode and wirelessly receives a media signal from the transmitting apparatus 100. If necessary, the wireless LAN mode is switched to the Ad- It is preferable to enter the low power mode (PS mode).

For example, when there is a user power-off request, the receiving apparatus 200 switches the wireless LAN mode from the AP mode to the Ad-hoc mode, enters the low power mode (PS mode) To transmit the power-off request so that the transmitting apparatus 100 can also enter the low-power mode (PS mode) after being switched to the Ad-hoc mode.

Hereinafter, a low-power operation method of a wireless transmission / reception system according to an embodiment of the present invention will be described in detail with reference to FIG. 4 to FIG.

4 is a flowchart illustrating a first embodiment of a low power operation method of a wireless transmission / reception system according to the present invention. The low power operation method shown in the figure is a block diagram showing the configuration of the reception apparatus 200 shown in FIG. 3, .

Referring to FIG. 4, the receiving apparatus 200 receives a power off request from a user (operation 300).

For example, during a normal operation in which the receiving apparatus 200 receives a media signal from the transmitting apparatus 100, the receiving apparatus 200 operates in the AP mode to enhance the wireless transmitting / receiving performance. The user operates the user input unit (Not shown) or an external remote controller (not shown) to depress the power off button to request the receiving apparatus 200 to be in a standby state.

However, the present invention is not limited to this, and may be applied to a low power mode in which the transmitting apparatus 100 and the receiving apparatus 200 do not transmit and receive signals, And a case where a user request to make a state is received.

Thereafter, the second RF transmitting / receiving unit 210 of the receiving apparatus 200 transmits the input power-off request to the transmitting apparatus 100 (step 310).

For example, the second controller 230 of the receiving apparatus 200 may transmit the power off request to the second RF transceiver 210 (210) so that the user power off request is transmitted to the transmitting apparatus 100 in the form of a wireless LAN packet (UDP over IEEE 802.11) Can be controlled.

Meanwhile, after receiving the transmitted power-off request, the transmitting apparatus 100 may transmit an ACK message to the receiving apparatus 200 in response to the transmitted power-off request.

The second controller 230 of the receiving apparatus 200 switches the wireless LAN mode to the Ad-hoc mode (step 320) and enters the low power mode (step 330).

For example, after confirming that the ACK message has been received from the transmitting apparatus 100, the second controller 230 sets the wireless LAN mode to the Ad-hoc mode to enter the low power mode (PS mode) You can switch.

After the receiving apparatus 200 is connected to the transmitting apparatus 100 in the switched Ad-hoc mode, the second controlling unit 230 controls the receiving apparatus 200, more specifically, It is possible to control the second RF transmitting and receiving unit 210, which is a wireless LAN block, to enter and operate in a low power mode (PS mode).

Also, the transmitting apparatus 100 may enter the low-power mode (PS mode) after switching the wireless LAN mode to the Ad-hoc mode according to the transmitted power-off request.

That is, in step 320, the transmitting apparatus 100 and the receiving apparatus 200 may be switched to the Ad-hoc mode for entry into the low power mode (PS mode) and connected.

According to the embodiment of the present invention, the wireless LAN blocks of the transceivers 100 and 200 in the low power mode (PS mode), i.e., the first and second RF transceivers 140 and 210, , Only the ATIM section is awake at full power for each beacon interval (BI), and the low power operation can be performed in a doze state at another section.

5 is a flowchart illustrating a second embodiment of a low-power operation method according to the present invention. The low-power operation method will be described with reference to a block diagram showing a configuration of the transmission apparatus 100 shown in FIG. 2 do.

Referring to FIG. 5, the transmitting apparatus 100 receives a power off request from the receiving apparatus 200 (operation 400).

For example, during a normal operation in which the receiving apparatus 200 receives a media signal from the transmitting apparatus 100, the receiving apparatus 200 operates in the AP mode to enhance the wireless transmitting / receiving performance, and the receiving apparatus 200 has a user input unit Off request of the user through an external remote controller (not shown) or the like.

Meanwhile, the receiving apparatus 200 transmits the power off request of the user to the transmitting apparatus 100 in the form of a wireless LAN packet (UDP over IEEE 802.11), and the first RF transmitting and receiving unit 240 of the transmitting apparatus 100 And may receive the packet-type power-off request.

After transmitting the power off request, the transmitting apparatus 100 transmits an ACK message to the receiving apparatus 200 in response to the transmitted power off request (step 410).

For example, when the power off request is received from the receiving apparatus 200, the first controller 130 generates the ACK message and transmits the ACK message to the receiving apparatus 200 through the first RF transmitting and receiving unit 140 Wireless transmission.

Thereafter, the first controller 130 of the transmission apparatus 100 switches the wireless LAN mode to the Ad-hoc mode (step 420), and enters the low power mode (step 430).

For example, after the first controller 130 transmits the ACK message to the transmitter 200, the first controller 130 switches the wireless LAN mode to the Ad-hoc mode to enter the low power mode (PS mode) .

After the transmission apparatus 100 is connected to the reception apparatus 200 in the switched Ad-hoc mode, the first controller 130 controls the transmission apparatus 100, more specifically, It is possible to control the first RF transceiver 140, which is a wireless LAN block, to enter and operate in a low power mode (PS mode).

Hereinafter, an embodiment of a method of switching the transmitting apparatus 100 and the receiving apparatus 200 operating in the low power mode (PS mode) to the normal operation mode (hot mode) will be described with reference to FIG. 6 and FIG. I will explain.

6 is a flowchart illustrating a third embodiment of a low-power operation method according to the present invention. The low-power operation method shown in FIG. 6 will be described in connection with a block diagram illustrating a configuration of a reception apparatus 200 shown in FIG. 3 do.

Referring to FIG. 6, the receiving apparatus 200 receives a power on request from a user (operation 340).

For example, during a normal operation in which the receiving apparatus 200 receives a media signal from the transmitting apparatus 100, the receiving apparatus 200 operates in the AP mode to enhance the wireless transmitting / receiving performance. The user operates the user input unit (Not shown) or an external remote control (not shown) to request the receiving apparatus 200 to be in a normal hot mode by pressing a power-on button.

However, the present invention is not limited to this case. The present invention can be applied to a case where the transmitting apparatus 100 and the receiving apparatus 200 are in a normal operation state in which signals are transmitted and received And a case where the user receives a user request to make a request.

Thereafter, the second RF transmitting / receiving unit 210 of the receiving apparatus 200 transmits the input power-on request to the transmitting apparatus 100 (operation 350).

For example, the second controller 230 of the receiving apparatus 200 may transmit the power-on request of the user to the second RF transceiver 210 (210) to be transmitted to the transmitting apparatus 100 in the form of a wireless LAN packet (UDP over IEEE 802.11) Can be controlled.

On the other hand, after receiving the power-on request, the transmitting apparatus 100 may transmit an ACK message to the receiving apparatus 200 in response to the transmitted power-on request.

The second controller 230 of the receiving apparatus 200 switches the wireless LAN mode from the Ad-hoc mode to the AP mode after releasing the low power mode (step 360) and connects the wireless LAN mode to the transmitting apparatus 100 (Step 370).

For example, after confirming that the ACK message has been received from the transmitting apparatus 100, the second controller 230 releases the current low power mode (PS mode) and transmits the wireless LAN mode to the AP mode So that it can be connected to the transmitting apparatus 100.

Also, the transmitting apparatus 100 may switch the wireless LAN mode to the AP mode after releasing the low power mode (PS mode) according to the transmitted power-on request.

That is, in step 370, the transmitting apparatus 100 and the receiving apparatus 200 can release the low power mode (PS mode) and switch to the AP mode to be connected.

In this case, in the AP mode, the transmitting apparatus 100 may be an access point (AP), and the receiving apparatus 200 may be connected to become a station, or vice versa.

FIG. 7 is a flowchart illustrating a fourth embodiment of the low power operation method according to the present invention. The low power operation method shown in FIG. 7 will be described in connection with a block diagram showing a configuration of the transmission apparatus 100 shown in FIG. 2 do.

Referring to FIG. 7, the transmitting apparatus 100 receives a power-on request from the receiving apparatus 200 (step 440).

For example, during a normal operation in which the receiving apparatus 200 receives a media signal from the transmitting apparatus 100, the receiving apparatus 200 operates in the AP mode to enhance the wireless transmitting / receiving performance, and the receiving apparatus 200 has a user input unit The power-on request of the user can be input through an external remote controller (not shown) or the like.

Meanwhile, the receiving apparatus 200 transmits the power-on request of the user to the transmitting apparatus 100 in the form of a wireless LAN packet (UDP over IEEE 802.11), and the first RF transmitting and receiving unit 240 of the transmitting apparatus 100 And may receive the packet-type power-on request.

After receiving the power-on request, the transmitting apparatus 100 transmits an ACK message to the receiving apparatus 200 in response to the transmitted power-on request (operation 450).

For example, when the power-on request is received from the receiving apparatus 200, the first controller 130 generates the ACK message and transmits the ACK message to the receiving apparatus 200 through the first RF transmitting and receiving unit 140 Wireless transmission.

Then, the first controller 130 of the transmitting apparatus 100 releases the low power mode (step 460), switches the wireless LAN mode to the AP mode, and is connected to the receiving apparatus 200 (step 470) step).

8 is a block diagram illustrating another embodiment of the configuration of a signal transmission / reception system. The signal transmission / reception system may include a transmission apparatus 100 and a plurality of reception apparatuses 200, 201, and 202.

Referring to FIG. 8, the transmitting apparatus 100 may be connected to a plurality of receiving apparatuses 200, 201, and 202 through a wireless network. That is, the transmitting apparatus 100 may convert the received media signal into data that can be transmitted wirelessly, and then wirelessly transmit the data to at least one of the plurality of receiving apparatuses 200, 201, and 202.

For example, the transmitting apparatus 100 selects one or more receiving apparatuses from among a plurality of receiving apparatuses 200, 201, and 202 to receive media signals, receives media signals received from the outside from the user, To the receiving device.

To this end, the transmitting apparatus 100 may include a plurality of wireless transmitting units (not shown) corresponding to each of the plurality of receiving apparatuses 200, 201 and 202, and a plurality of wireless transmitting units (not shown) May wirelessly transmit video and audio data to a corresponding receiving device.

The wireless communication standard for data transmission and reception may be the same or different from each other in each of the plurality of receiving apparatuses 200, 201, and 202. For example, the wireless communication standards for receiving data by each of the plurality of receiving apparatuses 200, 201, and 202 are different from each other depending on the performance or installation position of each of the plurality of receiving apparatuses 200, 201, .

Meanwhile, the transmitting apparatus 100 may have a number smaller than the number of the plurality of receiving apparatuses 200, 201 and 202, for example, a single wireless transmitting unit (not shown). In this case, 100 may wirelessly transmit data using a plurality of channels corresponding to each of the plurality of receiving apparatuses 200, 201, and 202 using multi-channel communication.

According to an embodiment of the present invention, the transmitting apparatus 100 receives a power-off request of a user from any of a plurality of receiving apparatuses 200, 201, and 202, After switching, you can enter the low power mode (PS mode).

9 is a block diagram showing another embodiment of the configuration of the signal transmission / reception system. The description of the signal transmission / reception system shown in FIG. 9 that is the same as that described with reference to FIG. 1 to FIG. 8 will be omitted below .

Referring to FIG. 9, the display device 500 according to an embodiment of the present invention may include the receiving device 200 and the display module 510 as described above.

That is, the transmitting apparatus 100 receives a media signal from the outside and wirelessly transmits the received media signal to the receiving apparatus 200, and the receiving apparatus 200 provided in the display apparatus 500 displays the wirelessly transmitted data Signal and output it to the display module 510.

The display module 510 may display an image using a video signal input from the receiving device 200. The display module 510 may be a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescent display (ELD) (Vacuum Fluorescent Display), and the like.

In addition, the low power operation method of the wireless transmission / reception system according to the present invention may be implemented as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer- A RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, as well as a carrier wave (for example, transmission via the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes, and code segments for implementing the upgrade method can be easily inferred by programmers of the art to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

1 is a block diagram showing an embodiment of a configuration of a signal transmission / reception system.

2 is a block diagram showing a configuration of a transmitting apparatus according to an embodiment of the present invention.

3 is a block diagram showing a configuration of a receiving apparatus according to an embodiment of the present invention.

4 is a flowchart illustrating a first embodiment of a low power operation method of a wireless transmission / reception system according to the present invention.

5 is a flowchart illustrating a second embodiment of a low power operation method according to the present invention.

6 is a flowchart showing a third embodiment of a low power operation method according to the present invention.

7 is a flowchart showing a fourth embodiment of a low power operation method according to the present invention.

8 is a block diagram showing another embodiment of the configuration of the signal transmission / reception system.

9 is a block diagram showing another embodiment of the configuration of the signal transmission / reception system.

Claims (21)

A low power operation method of a receiving apparatus for receiving a media signal from a transmitting apparatus connected via a wireless network, Receiving a power off request; Transmitting the power off request to the transmitting device; Switching a wireless LAN mode from an AP mode to an Ad-hoc mode; And And entering into a power saving mode after being connected to the transmitter in the Ad-hoc mode. The method according to claim 1, Wherein the receiving apparatus is connected to the transmitting apparatus in an AP mode to transmit and receive a signal. delete 2. The method of claim 1, And transmitting the power off request as a packet in a signal transmitted to the transmitting apparatus. 5. The method of claim 4, A method of operating a low power operation of a receiving apparatus that transmits a signal to the transmitting apparatus using a wireless communication scheme of any one of WiHD, WHDi, and WiFi. The method according to claim 1, Further comprising receiving from the transmitting device a response message to the transmitted power-off request. The method according to claim 1, Receiving a power on request; Transmitting the power-on request to the transmitting device; Releasing the low power mode; And And switching the wireless LAN mode from the Ad-hoc mode to the AP mode. delete A low power operation method of a transmitting apparatus for transmitting a media signal to a receiving apparatus connected via a wireless network, Receiving a power off request from the receiving device; Switching a wireless LAN mode from an AP mode to an Ad-hoc mode; And And entering the low power mode after connecting to the receiver in the Ad-hoc mode. 10. The method of claim 9, And transmitting a response message to the received power-off request to the receiving device. 10. The method of claim 9, Receiving a power-on request from the receiving device; Releasing the low power mode; And And switching the wireless LAN mode from the Ad-hoc mode to the AP mode. A computer-readable recording medium storing a program for causing a computer to execute the method according to any one of claims 1, 2, 4 to 7, and 9 to 11. A receiving apparatus for receiving a media signal from a transmitting apparatus connected via a wireless network, An RF transmitting and receiving unit for receiving a signal from the transmitting apparatus; And And a controller for switching the wireless LAN mode from the AP mode to the Ad-hoc mode in response to the power-off request and controlling the RF transceiver to enter the low power mode after being connected to the transmitter, And the RF transceiver transmits a power off request to the transmitting apparatus. 14. The apparatus of claim 13, wherein the control unit In response to a power-on request, switches the wireless LAN mode from the Ad-hoc mode to the AP mode after releasing the low power mode, and controls the RF transceiver to be connected to the transmitter. 15. The apparatus of claim 14, wherein the RF transceiver And transmits the power-on request to the transmitting apparatus. A display device comprising the receiving device according to any one of claims 13 to 15. A transmitting apparatus for transmitting a media signal to a receiving apparatus connected via a wireless network, An RF transmitting and receiving unit transmitting a signal to the receiving device and receiving a power off request from the receiving device; And And a controller for switching the wireless LAN mode from the AP mode to the Ad-hoc mode in response to the power-off request reception and controlling the RF transceiver to enter the low power mode after being connected to the receiver. 18. The apparatus of claim 17, wherein the RF transceiver And transmits a response message for the received power-off request to the receiving apparatus. 18. The apparatus of claim 17, wherein the RF transceiver And a power-on request from the receiving device. 20. The apparatus of claim 19, wherein the control unit In response to the power-on request, switches the wireless LAN mode from the Ad-hoc mode to the AP mode after releasing the low power mode and controls the RF transceiver to be connected to the receiver. 14. The receiving apparatus as claimed in claim 13, wherein the RF transceiver receives a response message to the transmitting power off request from the transmitting apparatus.

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