KR101099271B1 - Method for transmitting and receiving media signal, and receiving apparatus thereof - Google Patents

Abstract

The present invention relates to a method for transmitting and receiving a signal and a receiving apparatus using the same, the method comprising: transmitting and receiving a signal in a device receiving a media signal from a transmitting device connected through a wireless network, and searching for an external receiving device connected through a wireless network; Checking whether the found external receiving device exists in the retransmission list; And compressing a media signal received from the transmitting apparatus and transmitting the compressed media signal to the external receiving apparatus when the external receiving apparatus is not present in the retransmission list.

Description

Signal transmitting and receiving method and receiving apparatus using same

The present invention relates to a method and apparatus for transmitting and receiving a signal, and more particularly, to a method and apparatus for transmitting and receiving a media signal using wireless communication.

In general, a display device includes a broadcast receiving unit that receives and processes a broadcast signal from an airwave, a cable, and other external devices (VCR, DVD, etc.) and outputs it, and a display unit displaying an image of the processed broadcast signal on a screen. Can be.

On the other hand, the broadcast receiving unit and the display unit may be configured separately, each of which is a wireless (wireless) method of transmitting and displaying a broadcast signal received using a separate receiving device to the display device using a wireless communication in recent years Display systems are provided.

An object of the present invention is to provide a signal transmission and reception method and apparatus capable of efficiently transmitting and receiving media signals using wireless communication.

A signal transmission and reception method according to an embodiment of the present invention, transmitting and receiving a signal in a device receiving a media signal from a transmitting device connected to a wireless network, searching for an external receiving device connected to the wireless network; Checking whether the searched external receiving device exists in a retransmission list; And compressing a media signal received from the transmitting device and transmitting the compressed media signal to the external receiving device when the external receiving device is not present in the retransmission list.

According to an embodiment of the present invention, a receiving apparatus includes: an RF receiving unit receiving a media signal from a transmitting apparatus connected to a wireless network, and receiving the media signal from the transmitting apparatus; A scanning unit searching for an external receiving device connected to a wireless network; An encoder which compresses the received media signal; And an RF transmitter for transmitting the compressed signal to an external receiving apparatus found by the scanning unit.

On the other hand, the display device according to an embodiment of the present invention may be configured to include the receiving device.

In addition, the signal transmission and reception method may be implemented as a computer-readable recording medium recording a program for execution in a computer.

According to an embodiment of the present invention, the media signal can be retransmitted between a transmitting device and a plurality of receiving devices connected to a wireless network, so that a user can easily reproduce desired content using any of the receiving devices. As a result, the space limitation in the signal transmission / reception system using the wireless network can be eliminated.

Hereinafter, a signal transmission and reception method and a reception device using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an embodiment of a configuration of a signal transmission / reception system, and the signal transmission / reception system may include a transmission device 100 and a reception device 200.

Referring to FIG. 1, the transmission apparatus 100 receives a media signal including video and audio data from an airwave, a cable, or an external device, and converts the received media signal into data in a form capable of wireless transmission. By wireless transmission.

In an embodiment according to the present invention, the media signal is not limited to a signal received from a broadcasting station through an antenna or a cable, but may be a signal including content composed of video and audio.

The receiving device 200 receives and processes a media signal wirelessly transmitted from the transmitting device 100, and for this purpose, at least one wireless communication for transmitting and receiving data wirelessly between the transmitting device 100 and the receiving device 200. The standard may be preset.

Meanwhile, the transmitting apparatus 100 may include an HDMI or a high-definition multimedia interface (HDMI) terminal, a universal serial bus (USB) terminal, a component terminal, an external input terminal, an RGB terminal, and an antenna to which an external device is connected. Various input terminals such as a cable terminal may be provided to receive a signal using the input terminal.

The transmitting device 100 may be a set-top box (STB) that receives a media signal using a wired or wireless network, converts the received media signal and wirelessly transmits the received media signal to the receiving device 200.

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

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

In addition, the receiving device 200 may receive and process a signal transmitted wirelessly from the transmitting device 100, and then transmit the processed signal to an external device that outputs a video or audio signal.

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

According to an embodiment of the present invention, the transmitting device 100 and the receiving device 200 may be connected to various wireless communication standards, for example, wireless HD (WiHD), wireless home digital interface (WHDi), or wireless LAN (WiFi). Media signals may be transmitted and received using communication standards.

The WiHD uses a frequency band of about 60 GHz and transmits and receives data at a transmission rate of about 4 Gbps, thereby enabling transmission without compressing HD image data of 1080p (1920 × 1080). However, since the WiHD uses a high frequency of 60 GHz band, the data transmission / reception distance is about 10 m, and the transmission / reception quality may be easily affected by peripheral obstacles in the installation space.

The WHDi may 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 the transmission / reception quality may not be greatly influenced by peripheral obstacles in the installation space. On the other hand, according to a transmission rate of about 1.8 Gbps, when the HD video data of 1080p (1920 x 1080) is to be transmitted using the WHDi, the transmitter 100 needs to compress and transmit the HD video data.

In addition, the WiFi may transmit and receive data at a transmission rate of about 54 Mbp using a frequency band of 2.4 GHz. Since the WiFi uses a low frequency band of 2.4 GHz, the transmission and reception distance is about 50 ~ 200m, the transmission and reception quality may be hardly affected by the surrounding obstacles of the installation space. On the other hand, according to a low transmission rate of about 54Mbp, if you want to transmit 1080p (1920 × 1080) HD video data using the WiFi, the transmitting device 100 must compress and transmit the HD video data, accordingly An image quality deterioration may occur in an image signal received by the reception apparatus 200.

Meanwhile, in addition to the wireless communication standard described above, the transmitting device 100 and the receiving device 200 may use various short range wireless communication standards such as Bluetooth, ZigBee, or binary CDMA. It is possible to wirelessly transmit and receive data according to a media signal using communication standards such as).

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

Meanwhile, the transmitter 100 and the receiver 200 may transmit and receive video and audio data using two or more of the above-described wireless communication standards. For example, the transmitter 100 and the receiver may be used. According to the performance, the installation environment, and the resolution of the image, any one of the two or more supported standards may be selected and used for data transmission and reception.

2 is a block diagram illustrating a configuration of a signal transmission and reception system according to an embodiment of the present invention. The signal transmission and reception system illustrated in FIG. 2 includes a transmission device 100 and a plurality of reception devices 200 and 210. Can be.

Referring to FIG. 2, the transmitting device 100 may be connected to a plurality of receiving devices 200 and 210 through a wireless network. That is, the transmitting apparatus 100 may convert the media signal received from the outside into data capable of wireless transmission, and then wirelessly transmit the data to at least one of the plurality of receiving apparatuses 200 and 210.

For example, the transmitting apparatus 100 receives one or more receiving apparatuses from among a plurality of receiving apparatuses 200 and 210 to receive a media signal from a user, and receives the media signal received from the outside by the user. Wireless transmission.

To this end, the transmitter 100 may include a plurality of wireless transmitters (not shown) corresponding to each of the plurality of receivers 200 and 210, and each of the plurality of wireless transmitters (not shown) may correspond to each other. Video and audio data can be wirelessly transmitted to the 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 and 210. For example, wireless communication standards for receiving data from each of the plurality of receiving apparatuses 200 and 210 may be set differently according to the performance or the installation location of each of the plurality of receiving apparatuses 200 and 210. have.

Meanwhile, the transmitting apparatus 100 may include a number smaller than the number of the plurality of receiving apparatuses 200 and 210, for example, one wireless transmitter (not shown). In this case, the transmitting apparatus 100 may be Data may be wirelessly transmitted using multi-channel communication, that is, using a plurality of channels corresponding to each of the plurality of receiving apparatuses 200 and 210.

According to an exemplary embodiment of the present invention, the plurality of receiving apparatuses may be connected to each other through a wireless network to transmit and receive media signals received from the transmitting apparatus 100.

As the plurality of receiving apparatuses transmit and receive signals using the wireless network, the media signal received from the transmitting apparatus 100 may be reproduced using any of the plurality of receiving apparatuses.

In addition, while receiving and playing a signal from the transmitting apparatus 100 using any one of the plurality of receiving apparatuses, the reproduced content may be easily viewed without restriction of space using another receiving apparatus.

Referring to FIG. 2, the first receiving device 200 and the second receiving device 210 are connected to a wireless network, and media signals received from the transmitting device 100, for example, image data and audio data (AV data). ) Can be wirelessly transmitted and received with each other.

That is, the first receiving device 200 may be connected to the second receiving device 210 using a wireless network according to a wireless communication standard such as WiHD, WHDi, or WiFi, and receives a media signal from the transmitting device 100. Thereafter, the received media signal may be retransmitted to the second receiving device 210 using the wireless network.

Meanwhile, although the first receiving device 200 may wirelessly transmit the media signal received from the transmitting device 100 to the second receiving device 210 as it is, the second receiving device converts the received media signal. Or transmit to 210.

For example, the first receiving device 200 may receive an uncompressed media signal, that is, a signal including uncompressed AV data, from the transmitting device 100, and compresses the received uncompressed media signal. After that, the wireless transmission may be performed to the second receiving device 210.

According to another embodiment of the present invention, a wireless communication method for transmitting and receiving a signal between the transmitting device 100 and the first receiving device 200 and between the first receiving device 200 and the second receiving device 210. Wireless communication methods for transmitting and receiving signals may be different from each other.

When the transmitting device 100 and the first receiving device 200 are located close to each other, the transmitting device 100 and the first receiving device 200 may transmit and receive signals using a wireless communication method having a relatively short data transmission / reception distance. Can be.

For example, when the transmitting device 100 and the first receiving device 200 are located in one room, the transmitting device 100 and the first receiving device 200 may transmit and receive a media signal using a WiHD method. Accordingly, the transmitting device 100 may transmit a signal including the uncompressed AV data to the first receiving device 200.

Meanwhile, when the first receiving device 200 and the second receiving device 210 are located far from each other, the transmitting device 100 and the first receiving device 200 use a wireless communication method having a relatively long data transmission / reception distance. Can send and receive signals.

For example, when the first receiving device 200 and the second receiving device 210 are located in different rooms, the first receiving device 200 and the second receiving device 210 are wireless such as WHDi or WiFi. The media signal may be transmitted and received using a communication method, and accordingly, the first receiving device 200 may compress and transmit the AV data to the second receiving device 210.

That is, the wireless communication method between the transmitting device 100 and the first receiving device 200 and the wireless communication method between the first receiving device 200 and the second receiving device 210 are based on a distance or an obstacle between the devices. It may be set differently from each other by the presence or the like, and it may be determined whether to compress the AV data transmitted and received according to the set wireless communication scheme.

According to the retransmission method of the media signal as described above, the transmitting apparatus 100 and the receiving apparatuses 200 and 210 which are far apart from each other, for example, located in different rooms, may transmit and receive desired media signals.

The first receiving device 200 may receive a media signal from the second receiving device 210 by using the wireless network, and the received media signal is received by the second receiving device 210 from the transmitting device 100. It may be a received media signal.

The first and second receiving devices 200 and 210 may use various wireless signals in addition to the media signal, for example, the current of each receiving device by using a wireless network according to a wireless communication standard such as WiHD, WHDi, or WiFi as described above. A status signal having information on status, a remote control signal received from an external remote controller, or a voice signal generated by receiving a user's voice may be transmitted and received to each other.

Meanwhile, the first and second receiving devices 200 and 210 may be implemented by various types of devices. For example, the first and second receiving devices 200 and 210 may transmit and receive signals using a wireless network. Display device having a RF transceiver (not shown), a video controller such as a remote controller, a DVD player, a Divx player or a Blu-ray player, PC, game machine, home theater, portable It may be implemented as a terminal.

3 is a block diagram illustrating a configuration of a transmitter according to an exemplary embodiment of the present invention. The illustrated transmitter 100 includes an interface unit 110, a signal processor 120, and an RF transceiver 130. can do. A description of the same configuration as that described with reference to FIGS. 1 and 2 among the configuration of the transmitter 100 shown in FIG. 3 will be omitted below.

Referring to FIG. 3, the interface unit 110 is connected to an external device 300 to receive a signal, and includes input terminals such as HDMI, USB, component, and RGB for connection with the external device 300. Can be.

The signal processor 120 may convert a signal, for example, an image signal and an audio signal, input from the external device 300 into data in a form capable of wireless transmission according to a preset wireless communication standard and output the converted signal.

For example, when a signal received from the external device 300 is encoded according to a coding scheme such as MPEG, the signal processor 120 may decode and output the received video and audio signals. Can be.

The RF transceiver 130 wirelessly transmits a signal output from the signal processor 120 to the receiver 200. For that purpose, the RF transceiver 130 may include an antenna (not shown) and a converter (not shown), for example, an up converter and a down converter.

For example, the RF transceiver 130 may transmit the external device information as described above to the receiving device 200 through WiHD, WHDi, or WiFi.

According to an embodiment of the present invention, the RF transceiver 130 may receive the uncompressed AV data from the signal processor 120 and transmit it to the receiving device 200, for this purpose using a WiHD wireless communication method. The signal may be transmitted to the receiving device 200.

4 is a block diagram illustrating a configuration of a receiving apparatus according to an exemplary embodiment of the present invention. The illustrated receiving apparatus 200 may include an RF receiver 201, a signal processor 202, and an RF transmitter 203. have.

The RF receiver 201 may wirelessly receive a media signal from a transmitting device 100 connected through a wireless network, for example, a network using a wireless communication standard such as WiHD, WHDi, or WiFi.

According to an embodiment of the present invention, the RF receiving unit 201 may receive a media signal including uncompressed AV data from the receiving apparatus 100, and for this purpose, transmits a media signal using a WiHD wireless communication scheme. Can be received from 100.

The signal processor 202 may convert the signal received from the RF receiver 201 into a form that can be output and output the converted signal. For example, when a signal received from the transmitting device 100 is compressed according to a coding scheme such as MPEG, the signal processor 202 may include an A / V processor for decoding the received video and audio signals. Not shown).

Meanwhile, the RF transmitter 203 may wirelessly transmit a signal received from the transmitter 100 to an external device, for example, an external second receiver 210.

For example, the RF transmitter 203 of the first receiver 200 transmits the media signal received from the transmitter 100 to the second receiver 210 using a wireless communication standard such as WiHD, WHDi, or WiFi. Can be resent

5 is a block diagram illustrating a configuration of a receiving apparatus according to a second embodiment of the present invention. The receiving apparatus 200 illustrated includes an RF receiver 201, an encoder 204, a scanner 205, and a controller. 206 and an RF transmitter 203. A description of the same configuration as that described with reference to FIGS. 1 to 4 among the configurations of the reception apparatus illustrated in FIG. 5 will be omitted below.

Referring to FIG. 5, the scanning unit 205 searches for external devices connected to a wireless network, for example, other receiving devices, and the encoder 204 receives the media signal received from the RF receiver 201. Compress and print.

For example, the RF receiver 201 receives an uncompressed media signal from the transmitter 100, and the RF transmitter 203 wirelessly transmits the compressed media signal to the searched external receiver through the encoder 204. Can be.

The controller 206 controls the operations of the RF receiver 201, the encoder 204, the scanner 205, and the RF transmitter 203 as a whole, and more specifically, the media signal received from the transmitter 100. The compression may be controlled to retransmit to an external receiving device, for example, the second receiving device 210.

6 is a block diagram showing the configuration of a signal transmission and reception system according to a second embodiment of the present invention.

Referring to FIG. 6, the first receiving device 200 that receives a media signal from the transmitting device 100 is connected to external receiving devices, that is, the second to fourth receiving devices 210, 220, and 230. Can be connected to.

For example, the first receiving device 200 may retransmit the media signal received from the transmitting device 100 to the second receiving device 210 and the third receiving device 220 connected through the wireless network. 2 The receiving device 210 may retransmit the media signal received from the first receiving device 210 to the fourth receiving device 230.

Hereinafter, a signal transmission and reception method according to an embodiment of the present invention will be described in more detail with reference to FIGS. 7 and 8.

FIG. 7 is a flowchart illustrating a signal transmission and reception method according to an embodiment of the present invention. The broadcast reception method shown in FIG. 7 will be described with reference to a block diagram showing an embodiment of the configuration of the reception device shown in FIG. Let's do it.

Referring to FIG. 7, the scanning unit 205 of the first receiving apparatus 200 searches for external receiving apparatuses (400). For example, after the RF receiver 201 receives a media signal from the transmitter 100, the scanning unit 205 may search for other receivers connected to a wireless network under the control of the controller 206.

The controller 206 checks whether the found external receiving device exists in the retransmission list (step 410). The retransmission list may include information about each of the receiving devices that have received the media signal, for example, an identifier (UID, Unique ID) of the receiving device.

For that purpose, the RF receiving unit 201 may receive the retransmission list including the identifiers (UIDs) of the receiving device, and more specifically, may exchange the retrieved external receiving device and the retransmission list with each other.

The controller 206 checks whether a UID of the searched external receiving device, more specifically, the searched external receiving device, exists in the retransmission list, and if present, the external receiving device has retransmitted the media signal, or It can be determined that it is in a state of being resent.

Therefore, when the searched external receiving device exists in the retransmission list, the controller 206 controls not to retransmit the media signal received to the searched external receiving device.

On the other hand, when the searched external receiving apparatus exists in the retransmission list, the encoder 204 compresses and outputs an uncompressed media signal received from the transmitting apparatus 100 (step 420), and the RF transmitter 203 Wirelessly transmits the compressed media signal output from the encoder 204 to the searched external receiver.

For example, the RF transmitter 203 may transmit the compressed media signal to an external receiver to a wireless network based on a wireless communication method such as WHDi or WiFi.

Referring to FIG. 6, the scanning unit 205 of the first receiving device 200 may search for the second receiving device 210 and the third receiving device 220 connected through a wireless network.

In this case, the control unit 206 of the first receiving device 200 exchanges the retransmission list with the retrieved second and third receiving devices 210 and 220 through the RF receiving unit 201 and the RF transmitting unit 203, and The identifier (UID) of each of the searched second and third receivers 210 and 220 may be checked in the retransmission list.

If the identifiers (UIDs) of the second and third receivers 210 and 220 are not present in the retransmission list, the RF transmitter 203 of the first receiver 200 receives the compressed media signals in the second and third receivers. It may be retransmitted to each of the receiving apparatuses 210 and 220.

At this time, the identifier (UID) of each of the second and third receivers 210 and 220 that have retransmitted the media signal, and more specifically, the second and third receivers 210 and 220 may be included in the retransmission list.

Meanwhile, the second receiving device 210 may search for the fourth receiving device 230 connected through the wireless network and check whether the found identifier (UID) of the fourth receiving device 230 exists in the retransmission list. .

If the identifier UID of the fourth receiving device 230 does not exist in the retransmission list, the second receiving device 210 transmits the media signal received from the first receiving device 200 to the fourth receiving device 230. Can be resent

The identifier UID of the fourth receiving device 230 which has retransmitted the media signal is included in the retransmission list.

In addition, the third receiving device 220 may also search for the fourth receiving device 230 connected through the wireless network, and as described above, the identifier (UID) of the fourth receiving device 230 may exist in the retransmission list. . In this case, the third receiving device 220 does not retransmit the media signal to the fourth receiving device 230.

FIG. 8 is a flowchart illustrating a signal transmission and reception method according to a second embodiment of the present invention, and descriptions of the same as those described with reference to FIGS. 1 to 7 in the signal transmission and reception method shown in FIG. 8 will be omitted below. do.

According to an embodiment of the present invention, the reception apparatus 200 may internally manage one or more variables in order to retransmit a media signal received from the transmission apparatus 100 to an external reception apparatus connected to a wireless network.

More specifically, the controller 206 of the reception device 200 may manage a plurality of variables in order to control retransmission of the media signal. The plurality of variables indicate a first variable AV_ENCODER indicating whether to compress and retransmit the received media signal, a second variable AV_RELAY_EN indicating whether the media signal is retransmitted and whether the media signal has been retransmitted. It may include a third variable AV_RELAY_DONE.

Referring to FIG. 8, the scanning unit 205 of the first receiving device 200 searches for the second receiving device 210 connected through a wireless network (step 500), and the controller 206 performs the second variable AV_RELAY_EN. (1) (step 510).

In operation 510, the controller 206 may determine whether the first receiving device 200 may retransmit the media signal received from the transmitting device 100 using the second variable AV_RELAY_EN.

For example, when the second variable AV_RELAY_EN is set to '1', the controller 206 may determine that the first receiving device 200 can retransmit the media signal.

When the second variable AV_RELAY_EN is '1', the controller 206 transmits and receives a retransmission list and exchanges the retransmission list with the searched second receiver 210 through the RF receiver 201 and the RF transmitter 203. (Step 520). Meanwhile, when the second variable AV_RELAY_EN is '0', the controller 206 controls not to retransmit the media signal.

Thereafter, the controller 206 checks whether an identifier (UID) of the second receiving device 210 exists in the retransmission list (step 530).

If the identifier UID of the second receiving device 210 does not exist in the retransmission list, the controller 206 checks whether the first variable AV_ENCODER is '1' (step 540). Meanwhile, when the identifier UID of the second receiving device 210 exists in the retransmission list, the controller 206 controls not to retransmit the media signal.

If the first variable AV_ENCODER is '1', the encoder 204 compresses and outputs the media signal received from the transmitting apparatus 100 (step 550).

That is, the encoder 204 may compress and output the media signal received by the RF receiver 201 according to a preset encoding method under the control of the controller 206, and the encoding method may be the second receiver 210. ) May vary depending on the communication standards of the wireless network.

Meanwhile, when the media signal received by the RF receiver 201 includes compressed AV data, step 550 may be omitted.

The RF transmitter 203 transmits the compressed media signal to the second receiver 210 (step 560).

For example, the RF transmitter 203 may retransmit the signal output from the encoder 204 to the second receiver 210 according to a preset wireless communication method under the control of the controller 206.

When retransmitting the media signal to the second receiving device 210, the controller 206 may set the third variable AV_RELAY_DONE to '1'.

For example, when it is determined in step 540 that the first variable AV_ENCODER is '1', the controller 206 retransmits the media signal by setting the third variable AV_RELAY_DONE to '1'. The media signal may be retransmitted to the second receiving device 210.

FIG. 9 is a block diagram illustrating another embodiment of the configuration of the signal transmission and reception system, and descriptions of the same operations described with reference to FIGS. 1 to 8 among the operations of the signal transmission and reception system shown in FIG. 9 will be omitted below. Let's do it.

Referring to FIG. 9, the display apparatus 600 according to the exemplary embodiment of the present invention may include the receiving apparatus 200 and the display module 601 as described above.

The display module 601 may display an image using an image signal input from the receiving device 200, and for this, a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescent display (ELD), and a VFD It may include a display panel (not shown) of various display methods such as a (Vacuum Fluorescent Display).

That is, the transmitting device 100 receives a media signal from the outside and wirelessly transmits the media signal to the first receiving device 200, and the first receiving device 200 included in the first display device 600 transmits the wirelessly transmitted data. May be processed into an image signal of a displayable form and output to the first display module 601.

Meanwhile, the first receiving apparatus 200 receives a second signal provided in the second display apparatus 610 by receiving the media signal received from the transmitting apparatus 100 using the signal transmitting / receiving method according to the embodiment of the present invention as described above. The device 210 may retransmit.

In addition, the above-described signal transmission and reception method according to the present invention may be stored in a computer-readable recording medium that is produced as a program for execution in a computer, and examples of the computer-readable recording medium include ROM, RAM, CD- ROMs, magnetic tapes, floppy disks, optical data storage, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet).

The computer readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the broadcast reception method may be easily inferred by programmers in 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 details may be made therein without departing from the spirit and scope of the present invention.

1 is a block diagram illustrating an embodiment of a configuration of a signal transmission and reception system.

2 is a block diagram showing the configuration of a signal transmission and reception system according to a first embodiment of the present invention.

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

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

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

6 is a block diagram showing the configuration of a signal transmission and reception system according to a second embodiment of the present invention.

7 is a flowchart illustrating a signal transmission and reception method according to a first embodiment of the present invention.

8 is a flowchart illustrating a signal transmission and reception method according to a second embodiment of the present invention.

9 is a block diagram showing the configuration of a signal transmission and reception system according to a third embodiment of the present invention.

Claims (20)

A method for transmitting and receiving a signal in a device receiving a media signal from a transmitting device connected to a wireless network, Searching for an external receiving device connected to a wireless network; Checking whether the searched external receiving device exists in a retransmission list; And And compressing a media signal received from the transmitting device to the external receiving device when the external receiving device is not present in the retransmission list. The method of claim 1, And a media signal received from the transmitting device comprises uncompressed AV data. The method of claim 1, And transmitting and receiving the retransmission list with the searched external receiving apparatus when retransmission of the media signal is possible. The method of claim 1, And receiving the retransmission list from the searched external receiving device. The method of claim 4, wherein the retransmission list is Signal transmission and reception method comprising an identifier (UID, Unique ID) for at least one receiving device receiving the media signal. The method of claim 1, And the retransmission list is exchanged with the external receiving device. The method of claim 1, wherein the transmitting step Determining whether to compress and retransmit the received media signal. The method of claim 1, Before searching for the external receiving device, Setting at least one of a first variable indicating whether to compress and retransmit the received media signal, a second variable indicating whether or not retransmission of the media signal is possible, and a third variable indicating whether or not the media signal has been retransmitted Signal transmission and reception method further comprising. The method of claim 8, And transmitting the signal to the external receiving device, setting the third variable to '1'. The method of claim 1, And the media signal is received from the transmitting apparatus using WiHD. The method of claim 1, And the compressed media signal is transmitted to the external receiving device using any one of WHDi and WiFi. An apparatus for receiving a media signal from a transmitter connected via a wireless network, the apparatus comprising: An RF receiver for receiving a media signal from the transmitter; A scanning unit searching for an external receiving device connected to a wireless network; An encoder which compresses the received media signal; And And an RF transmitter for transmitting the compressed media signal to an external receiver retrieved by the scanning unit. The method of claim 12, A first variable indicating whether to compress and retransmit the received media signal; A second variable indicating whether retransmission of the media signal is possible; And a control unit managing at least one of a third variable indicating whether the media signal has been retransmitted. The method of claim 13, wherein the control unit And receiving the first variable to control the media signal compression of the encoder. The method of claim 13, wherein the control unit The receiving device to check the second variable to control the media signal transmission of the RF transmitter. The method of claim 13, wherein the control unit The receiver sets the third variable to '1' when transmitting a signal to the external receiver. The method of claim 13, wherein the RF receiver Receiving a retransmission list including an identifier (UID, Unique ID) for a receiving device receiving the media signal, The control unit checks whether the external receiving device is included in the retransmission list. The method of claim 17, wherein the control unit And control the RF transmitter to retransmit the media signal to the external receiver when the external receiver is not included in the retransmission list. The method of claim 12, The media signal received from the transmitting device comprises uncompressed AV data, And the RF receiver receives the media signal from the transmitter by using WiHD. The method of claim 12, wherein the RF transmitter A receiving device for transmitting the compressed media signal to the external receiving device using any one of WHDi and WiFi.

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