KR20040066623A - System and the methode for tv transmission and receive using of wireless lan - Google Patents

Abstract

PURPOSE: A TV transceiving system using a wireless LAN and a method therefor are provided to apply a wireless LAN to a server and a client, and to comprise one TV decoder in the server, so that plural clients can use the TV decoder for mobile functions without another TV decoder. CONSTITUTION: A TV decoder receives TV data signals being transmitted externally, decodes the received signals into audio/video signals, and transmits the decoded audio/video signals. A server(301) receives the TV data signals decoded into the audio/video signals, and wirelessly transmits the received TV data signals. A client receives the TV data signals transmitted from the server(301). The TV decoder comprises as follows. A TV tuner(307) receives TV signals. An A/V decoder(308) decodes the TV signals into audio/video signals. The first USB(310) encodes the audio/video signals into USB signals, and transmits the USB signals to the server(301).

Description

TV transmission / reception system using wireless LAN and method thereof {SYSTEM AND THE METHODE FOR TV TRANSMISSION AND RECEIVE USING OF WIRELESS LAN}

The present invention relates to a system for transmitting / receiving a TV using a wireless LAN and a method thereof, and in particular, by applying a wireless LAN to a server and a client, a single TV decoder is provided in a server, and a plurality of clients can be used as a mobile without a separate TV decoder. The present invention relates to a TV transmission and reception system using a WLAN and a method thereof.

In general, most data communication forms have been made through twisted pair, coaxial cable or fiber optic cable. However, the limitation that the computer-to-computer cable must be connected at all times for communication is insufficient to satisfy the information needs of those who want to obtain necessary information regardless of time and place.

In addition, cables that are connected to each computer and peripheral devices and wrap around walls, floors, and ceilings like snakes are a big problem for users who use wired communication, especially network administrators. These cables are not only cumbersome to install in an existing office environment, but they also incur additional cable and labor costs after each installation of the computer.

Therefore, in recent years, there has been an active movement to apply a wireless LAN without space restrictions. Wireless LAN is a network construction method using radio waves (RF), light (infrared rays), etc. instead of wired cables, and is a concept of implementing a LAN environment wirelessly without connecting cables.

The WLAN can be divided into two basic technologies, that is, a radio method using a radio wave technology and an infrared method using a light. The WLAN using a radio method is again spread spectrum method and narrowband micro device according to specific technical characteristics. It is classified into a narrowband microwave method. Among them, the spread spectrum WLAN using ISM band is the most common among WLAN technologies because of the low interference and different users can use the same frequency band at the same time.

Wireless LAN is a determinant of wireless communication technology that provides various advantages of LAN that can share various information and resources and convenience of providing unlimited connectivity.It also provides flexibility and ease of installation as well as reliable data transmission. Installability is an advantage.

In particular, since wireless LAN does not use a cable, it is not restricted by geopolitical installation, and even when the location of the terminal is changed, added, or deleted, there is no need to expand or change the line, which can drastically reduce human and economic costs compared to a wired LAN. .

1 is a diagram schematically illustrating a system configuration of a server and a client using a general WLAN. As shown therein, the server 101 is configured to wirelessly transmit data signals, and the client 102 is configured to receive data signals transmitted wirelessly from the server 101.

The field of applying the server 101 and the client 102 to a wireless LAN is increasing.

2 is a diagram schematically illustrating a configuration of a system having a TV decoder according to the related art. As shown in the figure, the TV decoder 202 receives and decodes and transmits a TV signal from the outside, and the main board 201 receives a signal decoded and transmitted by the TV decoder 202. .

The TV decoder 202 includes a TV tuner 207 for receiving a TV signal from the outside, and an A / V decoder 208 for decoding the TV signal received from the TV tuner 207 into an audio signal and a video signal. And a first USB (Universal Serial Bus) 210 for transmitting the audio and video signals decoded by the A / V decoder 208 to the main board 201.

The main board 201 may include a second USB 204 for receiving an audio / video signal transmitted from a first universal serial bus (USB) 210 of the TV decoder 202, and the second USB 205. The graphics card 206 converts the received video signal into a signal for display and a sound card 205 for converting the received audio signal from the second USB 204 into a signal for output. It is configured to include.

However, in the above configuration, since image data is displayed only in the display device of the system equipped with the TV decoder 202, and the main board and the display device having the TV decoder are connected by wires, the mobile cannot be mobile. Is generated.

The present invention provides a TV transmission and reception system and method using a wireless LAN that can be used as a mobile without a separate TV decoder by having a single TV decoder in the server by applying a wireless LAN to the server and the client. The purpose is.

1 is a diagram schematically illustrating a system configuration of a server and a client using a general wireless LAN.

2 is a diagram schematically showing a configuration of a system having a TV decoder according to the related art.

3 is a diagram schematically illustrating a configuration of a system for transmitting and receiving a TV signal to a server and a client using a wireless LAN according to the present invention.

<Description of the symbols for the main parts of the drawings>

301 --- Server 302 --- Client

303 --- TV decoder 304, 314 --- CPU

305,317 --- sound card 306, 310 --- 1st, 2nd USB

307 --- TV Tuner 308 --- A / V Decoder

309 --- MPEG Encoder 312 --- MPEG Decoder

TV transmission and reception system using a wireless LAN according to the present invention to achieve the above object,

A TV decoder which receives a TV data signal transmitted from the outside, decodes the audio / video signal and transmits the decoded audio / video signal;

A server for wirelessly receiving the TV data signal decoded as audio / video from the TV decoder;

It is characterized in that it includes a client for receiving an audio / video TV data signal transmitted from the server.

Here, in particular, the TV decoder includes a TV tuner unit for receiving a TV signal from the outside;

An A / V decoder which decodes the TV signal received by the TV tuner into an audio signal and a video signal;

The A / V decoder includes a first USB for encoding the audio signal and the video signal decoded by the A / V decoder into a USB signal and transmitting the same to a server.

In particular, the TV decoder is characterized by further configuring an MPEG encoder for compressing the transmitted data signal.

Here, in particular, the server comprises: a second USB for receiving the video signal transmitted from the first USB of the TV decoder;

A sound card for receiving an audio signal transmitted from the first USB of the TV decoder;

A CPU for decoding an audio / video signal transmitted from the second USB and the sound card and encoding the audio / video signal according to a wireless communication protocol;

It is characterized in that it comprises a first wireless LAN for wirelessly transmitting the TV data signal encoded in the CPU.

Here, in particular, the client may include a second WLAN for receiving a TV data signal transmitted from the first WLAN;

A client CPU decoding the TV data signal received from the second WLAN according to a wireless communication protocol;

A speaker for converting and outputting an audio signal decoded in accordance with a wireless communication protocol from the client CPU in the client CPU;

The CPU may include a display unit configured to display a video signal decoded according to a wireless communication protocol by the CPU.

In particular, the client is characterized in that the MPEG decoder for further decompressing the compressed and transmitted data is further configured.

In addition, the method of the TV transmission and reception system using a wireless LAN according to the present invention to achieve the above object,

Receiving a TV data signal transmitted from the outside;

Decoding an audio / video signal of the received TV data signal;

When the decoded audio / video signal is transmitted via USB, receiving an audio / video signal via USB;

Wirelessly transmitting the received audio / video signal by a wireless communication protocol;

And receiving the wirelessly transmitted audio / video signal through an output device suitable for each signal.

According to the present invention, by applying the wireless LAN to the server and the client by having a single TV decoder in the server can be used as a mobile in a plurality of clients without a separate TV decoder.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram schematically illustrating a configuration of a system for transmitting and receiving a TV signal using a wireless LAN to a server and a client according to the present invention. As shown in the figure, a TV decoder 303 which receives a TV data signal transmitted from the outside, decodes it into an audio / video signal and then transmits the signal; A server 301 which receives the TV data signal decoded as audio / video from the TV decoder 303 and wirelessly transmits it; And a client 303 for receiving the audio / video TV data signal transmitted from the server 301.

The TV decoder 303 may include a TV tuner unit 307 for receiving a TV signal from the outside, and an A / V decoder unit 308 for decoding the TV signal received from the TV tuner unit 307 into an audio signal and a video signal. And a first USB (Universal Serial Bus) 310 for encoding the audio signal and the video signal decoded by the A / V decoder unit 308 into a USB signal and transmitting the same to a server.

In addition, the TV decoder 303 further configures an MPEG encoder 309 for compressing a transmitted data signal.

The server 301 may include a second USB 306 for receiving a video signal transmitted from the first universal serial bus (USB) 310 of the TV decoder 303, and a first USB of the TV decoder 303. The sound card 305 to receive the audio signal transmitted from the Universal Serial Bus 310 and the audio / video signal received from the second USB 306 and the sound card 305 to wirelessly communicate again. And a first wireless LAN 304 for wirelessly transmitting the TV data signal encoded by the CPU 304.

The client 303 wirelessly communicates the TV data signal received from the second WLAN 311 and the second WLAN 311 to receive the TV data signal transmitted from the first WLAN 304. A client CPU 314 for decoding in accordance with a protocol, a speaker 318 for converting and outputting an audio signal decoded in accordance with a wireless communication protocol in the CPU 314 in a sound card 317, and in the CPU 314. And a display unit 317 for displaying and decoding the video signal decoded according to the wireless communication protocol in the graphic card 315.

The client 303 further includes an MPEG decoder 312 for decompressing the compressed and transmitted data.

A method using a TV transmission / reception system using a wireless LAN according to the above configuration will be described.

First, the TV tuner 307 of the TV decoder 303 receives a TV data signal transmitted from an air wave or a cable. The A / V decoder 308 decodes an audio / video signal from the received TV data signal, respectively.

Subsequently, the decoded audio / video signal is transmitted back to the server 301 through the first USB 310, and then received by the second USB 306 of the server 301.

Meanwhile, the MPEG encoder 309 transmits the received audio / video signal according to a specification of the CPU 314 of the client 303 or a wireless communication protocol used in the first WLAN 304. The video signal is compressed.

More specifically, the MPEG encoder 309 compresses the audio / video signal according to a wireless communication protocol. The MPEG (Moving Picture Experts Group) is a file that reduces the volume and efficiently stores files to reduce the burden on transmission. Compressed video is a standard technology for compressing video. MPEG-compressed video is reproduced in real time in communication, storage media, and broadcast media.

The received audio / video signal is wirelessly transmitted by the wireless communication protocol in the WLAN. Here, the protocol refers to a set of procedures or norms that allow one communication system to perform the transmission through another communication system and a transmission medium at a remote location.

Subsequently, the wirelessly transmitted audio / video signal is received by the second wireless LAN 311 of the client 303 and output through an output device suitable for each signal.

In detail, the sound card 317 of the client 303 converts the audio signal and outputs the audio signal through the speaker 318, and the graphic card 315 converts the video signal to the display unit 316. The image will be displayed on the screen.

Meanwhile, if the TV decoder 303 encodes an audio / video signal using the MPEG encoder 309, the MPEG decoder 312 of the client 303 decodes the audio / video signal.

The MPEG decoder 312 generally decompresses an audio / video signal compressed by the MPEG encoder 309 using a codec for releasing a compressed video or music file.

The client 303 may be connected in an AP (access point) manner to simultaneously access a plurality of clients.

The AP is one of the devices constituting the wireless LAN. Since the AP is handed off from one AP to another AP according to the user's location, the AP can be used as the user moves. . Here, the AP is generally a standalone device, which can be plugged into an Ethernet hub or server.

On the other hand, the user may be provided with a program of the user interface, such as changing the TV channel on the server or the client.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, a system for transmitting / receiving a TV using a wireless LAN according to the present invention and a method thereof include a single TV decoder in a server by applying a wireless LAN to a server and a client, and thus the mobile terminal can be used without multiple TV decoders. Can be used as

Claims (7)

A TV decoder which receives a TV data signal transmitted from the outside, decodes the audio / video signal and transmits the decoded audio / video signal; A server for wirelessly receiving the TV data signal decoded as audio / video from the TV decoder; And a client receiving the audio / video TV data signal transmitted from the server. The method of claim 1, The TV decoder includes a TV tuner unit for receiving a TV signal from the outside; An A / V decoder which decodes the TV signal received by the TV tuner into an audio signal and a video signal; And a first USB encoding the audio signal and the video signal decoded by the A / V decoder unit as a USB signal and transmitting the same to a server. The method of claim 2, The TV decoder further comprises an MPEG encoder for compressing the transmitted data signal TV transmission and reception system using a wireless LAN. The method of claim 1, The server includes a second USB for receiving a video signal transmitted from the first USB of the TV decoder; A sound card for receiving an audio signal transmitted from the first USB of the TV decoder; A CPU for decoding an audio / video signal transmitted from the second USB and the sound card and encoding the audio / video signal according to a wireless communication protocol; And a first WLAN for wirelessly transmitting the TV data signal encoded by the CPU. The method of claim 1, The client may include a second WLAN for receiving a TV data signal transmitted from the first WLAN; A client CPU decoding the TV data signal received from the second WLAN according to a wireless communication protocol; A speaker for converting and outputting an audio signal decoded in accordance with a wireless communication protocol from the client CPU in the client CPU; And a display unit configured to display a video signal decoded in accordance with a wireless communication protocol in a CPU by the CPU. The method of claim 5, And a MPEG decoder configured to decompress the compressed and transmitted data in the client. Receiving a TV data signal transmitted from the outside; Decoding an audio / video signal of the received TV data signal; When the decoded audio / video signal is transmitted via USB, receiving an audio / video signal via USB; Wirelessly transmitting the received audio / video signal by a wireless communication protocol; And receiving the wirelessly transmitted audio / video signal and outputting the same through an output device suitable for each signal.