KR100278441B1 - Internet TV set with RDS transmission device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rate adaptive digital subscriber line (RADSL) transmission apparatus, and more particularly, to an Internet TV set capable of easily selecting a channel of an Internet TV through a RADSL network and transmitting and receiving at high speed. The present invention provides a RADSL device (RADSL-COT) installed on the operator side connected to the Internet network, a plurality of RADSL devices (RADSL-RT) installed on the subscriber side, and images and data transmitted through the plurality of RADSL-RTs. It consists of a plurality of Internet TVs which are respectively displayed. The Internet TV converts a subscriber request signal into a packet data format and transmits it to the RADSL-RT. The RADSL-RT transmits upstream data in which an overhead is added to the subscriber request packet data to the RADSL-COT. The RADSL-COT is electrically connected through a telephone line to manage the plurality of subscriber-side RADSL devices, and provides downstream data of the corresponding station to the subscriber-side RADSL device according to the subscriber request.

Description

Internet TV set with RDS transmission device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rate adaptive digital subscriber line (RADSL) transmission apparatus, and more particularly, to an Internet TV set having a RADSL transmission apparatus for easily selecting a channel of an Internet television (TV) and transmitting and receiving at high speed.

In general, in order to use the Internet, a computer such as a personal computer or a workstation is required, and a complicated environment for Internet access is required. This is not only difficult for general subscribers who are not used to computer operation, but also has the inconvenience of having to go through a cumbersome process such as running an information retrieval program after accessing the Internet. In order to alleviate the inconvenience of using the Internet through such a computer, an Internet TV that can access the Internet at any time even while watching TV has been developed.

In general, Internet TVs include a built-in Internet TV in which an Internet module is embedded in an existing TV model, and a set-top box type Internet TV connected to an existing TV by a set top box (STB) capable of searching the Internet. Such Internet TV is for the general public to easily access the Internet through a wired / wireless keyboard based on a remote control through a TV.

In particular, the set-top box-type TV that can use the existing TV in the home as it is, as shown in Figure 1, to connect the STB 11 to the TV 12 and the telephone line to connect to the Internet network 10 It is composed. The Internet TV may be connected to the Internet using a channel setting device such as a remote controller (not shown) after turning on the STB 11 and switching the TV 12 mode to an external input mode. This is similar to the operation for VCR viewing. That is, the power is supplied to the STB 11 and the Internet TV 12, and the Internet can be used without any environment setting.

You can also search for all Internet website information by selecting the "direct" menu on the remote control and entering only the Internet address. Further, the STB 11 and a printer (not shown) may be connected to print information data of electronic mail or the Internet.

In addition, a user of the Internet TV can install an e-mail program such as 'Navigator Messenger' or 'Outlook', and can use the e-mail service without any special configuration. For example, a user may select an “e-mail” menu on the initial screen and then press a menu such as “receive or send” to send and receive e-mail. In addition, it is possible to conveniently write an e-mail through a remote controller or a wireless keyboard, and an e-mail frequently used through an address book menu may send an e-mail without inputting an address. In other words, the same functions can be obtained using the Internet TV without limitless information and functions that can be obtained by accessing the Internet using a computer.

The user can access the Internet network using the remote control on the initial screen and select various menus provided by the Internet servers, and receive new information and services for convenience of life.

The Internet TV 11 automatically connects to the Internet by pressing a desired channel using a remote controller or the like while the power is connected. Therefore, even if you watch a baseball game or a drama, you can connect to the Internet very easily as if you are changing channels.

However, Internet TV is connected to the Internet by connecting a general modem (modem speeds of 28Kbps, 33Kbps, 56Kbps connected to a regular telephone line) has a disadvantage of slow transmission speed. In addition, there is a disadvantage in that a separate set-top box (STB) must be purchased for Internet access.

Accordingly, the present invention has been made to overcome the above disadvantages, the Internet having a Rate Adaptive Digital Subscriber Line (RADSL) transmission apparatus that enables high-speed Internet access and transmission and reception through a general telephone line The purpose is to provide a TV set.

The present invention for achieving the above object is a plurality of Internet TV that can be connected to the Internet network for converting the subscriber request signal into a packet data format and output; A plurality of subscriber-side RADSL devices (RADSL-RT) for transmitting the subscriber request packet data as upstream data and receiving and transmitting downstream data to the plurality of Internet TVs; And an operator electrically connected through a telephone line to manage the plurality of subscriber-side RADSL devices, and accessing the Internet network through an Internet-dedicated line to deliver downstream data of the corresponding station according to the subscriber request to the subscriber-side RADSL device. It is characterized by including a side RADSL apparatus (RADSL-COT).

1 is a schematic configuration diagram of a conventional Internet TV set,

2 is a block diagram of a RADSL transmission apparatus according to the present invention;

3 is a detailed circuit diagram of the frame processor of FIG. 2;

4 is an overall configuration diagram of an Internet TV set including the RADSL transmission apparatus of FIG. 2.

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

20: Rate Adaptive Digital Subscriber Line-Central Office Terminal (RADSL-COT) 21: Rate Adaptive Digital Subscriber Line-Remote Terminal (RADSL-RT)

22: Unshield Twisted Pair (UTP)

201,214: chip bridge 202,213: frame processor

203, 212: Modem 204, 211: AFE part

30, 40: Synchronous header insert 31, 41: Overhead insert

32, 42: Transmission buffer 33, 43: Sync detection unit

34, 44: error detector 35, 45: receiving buffer

First, the RADSL technique will be described to help understand the present invention.

xDSL is a new modem technology for transmitting broadband using twisted pair (TP). The fastest 56.6 Kbps of voiceband modems must experience significant delays when browsing the Internet, and even 128 Kbps ISDN is not enough to handle applications such as real-time multimedia or video conferencing. Developed to solve this problem, xDSL uses advanced modulation technologies such as Discrete Multi-Tone (DMT) or Carrierless AM / PM (CAP) to transmit data from TP to several Mbps to tens of Mbps. xDSL is DSL, high bit rate DSL (HDSL), Asymmetric DSL (ADSL), Rate Adaptive DSL (RADSL), and VDSL (Very high speed) depending on bidirectional speed symmetry, transmission distance, and plain old telephone service acceptance. DSL). In particular, ADSL currently provides 1 Mbps to 8 Mbps downstream from the telephone station to the subscriber, up to 16 Kbps to 1 Mbps from the subscriber to the telephone, and at the same time, existing telephone service (POTS).

In addition to the ADSL modem function, RADSL allows various downstream speeds according to the transmission distance, so that it can be adaptively serviced at the maximum bit rate regardless of the distance.

The present invention is to configure the Internet TV set using the RADSL transmission device, to provide the convenience of subscribers by ensuring a faster Internet access and various channel selection than the general modem.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

2 is a configuration diagram of a RADSL transmission apparatus according to the present invention, and FIG. 4 is an overall configuration diagram of an Internet TV set including the RADSL transmission apparatus of FIG. 2.

First, referring to FIG. 4, a rate adaptive digital subscriber line-central office terminal (RADSL-COT) 420 installed on an operator side connected to the Internet network 410 and a RADSL device (RADSL-- installed on a subscriber side) are installed. Rate Adaptive Digital Subscriber Line-Remote Terminal (RT) 411 and Internet TV 451 displaying images and data received through the RADSL-RT 411.

The configuration and operation of the RADSL-COT 20 and the RADSL-RT 21 will now be described with reference to FIG. 2.

The RADSL-COT 20 includes a chip bridge 201, a frame processor 202, a modem 203, and an analog front end (AFE) 204. Similar to the RADSL-COT 20, the RADSL-RT 21 includes an AFE unit 211, a modem 212, a frame processing unit 213, and a chip bridge 214.

The chip bridge 201 has an interface function and an interface matching function corresponding to an operation network (Internet network), and the chip bridge 214 has an interface function and an interface matching function corresponding to a subscriber network (LAN, ISDN).

Each frame processor 202 or 213 inserts an overhead into packet data transmitted from each chip bridge 201 and 214 to form a frame and transmits the frame to each modem 203 or 212. In the reverse direction, the overhead is removed from the frames transmitted from the modems 203 and 212 and converted into data in the form of packets, and then transferred to the chip bridges 201 and 214. The frame processing units 202 and 213 may be implemented by programmable logic, for example, Field Programmable Gate Arrays (FPGAs).

Each of the modems 203 and 212 modulates transmission data in the form of a frame and transmits the data through the respective AFE units 204 and 211, and demodulates the received data in the form of a frame to each frame processing unit 202 or 213. As a modem transmission method, for example, a quadrature amplitude modulation (QAM), a CAP method, or a DMT method may be used.

Each AFE unit 204, 211 converts digital data into an analog signal for transmission over an unshielded twisted pair (UTP) 22, and converts the analog signal into digital data for reception.

In the downstream transmission process in the RADSL-COT 20, the payload A transmitted in the form of packet data from a station (Internet server or Internet broadcasting station) is transmitted to the frame processor 202 through the chip bridge 201. 20a). The frame processing unit 202 inserts overhead (header H and tail T) into the packet data, generates a frame B, provides the frame B to the modem 203 (20b), and modulates it through the modem 203. The frame is converted into an analog signal via the AFE unit 204 and transmitted to the RADSL-RT 21 via the UTP 22.

In the upstream reception process of the RADSL-COT 20, the request signal of the subscriber is converted to an upstream data signal transmitted from the RADSL-RT 21 through the AFE 204, and then the modem 203 is received. By demodulation in the form of frame D, and provided to frame processing unit 202 (20d). The frame processor 202 removes the overhead from the received frame D and transfers only the pure payload portion C to the chip bridge 201 (20c).

The downstream reception process in the RADSL-RT 21 and the upstream transmission process in the RADSL-RT 21 operate in the same manner as the transmission and reception process of the RADSL-COT 20 described above.

The frame data transmitted on the UTP 22 is formed by inserting a header H and a tail T for each predetermined payload. For example, as in 25 of FIG. 2, five payloads form one frame, H1 is a frame synchronization word section for synchronizing transmission and reception, and H2, H3 is an inserted operation channel (indicative of an operation channel). Embedded Operation Channels (EOC) section, T5 is a parity section for detecting data errors. A kind of cyclic redundancy check (CRC) can be employed for error detection.

3 is a detailed circuit diagram of the frame processor of FIG. 2, in which the frame processor 202 on the RADSL-COT side and the frame processor 213 on the RADSL-RT side are shown. In this embodiment, the frame processing units 202 and 213 are implemented as FPGAs.

In the COT side frame processing unit 202, a component for downstream transmission includes a synchronization head inserting unit 30 and an overhead inserting unit 31 for inserting an overhead into the packet-shaped data to form a frame, and temporarily storing the frame. And a transmission buffer 32 for storing and outputting downstream data DOWN DATA according to the down clock signal DOWN_CLK.

In the RT-side frame processing unit 213, a component for downstream reception includes a synchronization detector 33 and an error detector 34 for detecting frame synchronization and transmission errors from the downstream data, and an overhead in the downstream data frame. After removal, only the payload is extracted and temporarily stored, and is configured as a reception buffer 35 outputted according to the clock signal CLK.

The component for upstream transmission in the RT-side frame processing unit 213 includes a sync head inserter 40 and an overhead inserter 41 which form a frame by inserting an overhead into the packet data and temporarily store the frame. And a transmission buffer 42 for outputting upstream data UP DATA in accordance with the clock signal CLK.

The component for upstream reception in the COT side frame processing unit 202 may include a synchronization detector 43 and an error detector 44 that detect frame synchronization and transmission errors from the upstream data, and then remove the overhead from the upstream data frame. It consists of a receiving buffer 45 which extracts only the load and temporarily stores it and outputs it according to the up clock signal UP_CLK.

Now, the operation and effect of the Internet TV set including the RADSL transmission apparatus described with reference to FIGS. 2 to 3 will be described with reference to FIG.

As shown in FIG. 4, a plurality of stations 401 to 404 such as an Internet server and a broadcasting station connected to the Internet network 410, and an RADSL-COT 420 connected to the Internet network 410 and an Internet dedicated line 430. And a plurality of RADSL-RTs 441 to 444 and RADSL-RTs 441 to 444 connected to the RADSL-COT 420 and a telephone line 431 / UTP 432 to receive Internet broadcasts. Internet TV (451-454) is comprised. In addition, the UTP 432 may be connected to a telephone to receive a general telephone service at the same time as the Internet TV.

When the subscriber selects a control key for accessing the Internet or watching an Internet TV through a remote controller or a wired / wireless keyboard (not shown), the subscriber receives the control signal from the Internet TV 451, converts the control signal into packet data, and then RADSL. Forward to RT 441. The RADSL-RT 441 transmits the received data upstream to the RADSL-COT 420 by inserting overhead by the frame processing unit 213 of FIG. 3 as in the upstream transmission process described above.

The control signal transmitted to the RADSL-COT 420 is transmitted to the corresponding station through the Internet network 410. The service provided by the station selected by the subscriber is delivered to the subscriber through the downstream transmission process described above.

In a more preferred embodiment of the present embodiment, when the subscriber wants to change the channel, the RADSL-RT receives the control signal through the remote controller and carries the channel change control signal in the overhead section in the frame of the uplink signal. Then, the RADSL-COT on the operator side can change the channel to the corresponding station.

The RADSL transmission apparatus of the present embodiment can be applied to not only Internet TV but also various systems requiring bidirectional transmission. In particular, the RADSL transmission apparatus can provide high quality video and high quality audio service using a telephone line.

The invention is not limited by the embodiments described above, but can be variously modified and changed by those skilled in the art, which are included in the spirit and scope of the invention as defined in the appended claims.

As described above, the Internet TV set using the RADSL transmission apparatus of the present invention can provide a convenient Internet connection and high-speed data transmission and reception (for example, a transmission speed about 100 times faster than a general modem). In addition, since a regular telephone line is used, it is possible to save telephone charges due to prolonged use. In addition, since there is no need to purchase a separate set-top box when using the existing Internet TV there is an economic benefit.

Claims (6)

A plurality of Internet TVs connected to the Internet network for converting and outputting a subscriber request signal into a packet data format; A plurality of subscriber-side RADSL devices (RADSL-RT) for transmitting the subscriber request packet data as upstream data and receiving and transmitting downstream data to the plurality of Internet TVs; And The operator side is electrically connected through a telephone line to manage the plurality of subscriber-side RADSL devices, and accesses the Internet network through an Internet-dedicated line to deliver downstream data of the corresponding station to the subscriber-side RADSL device according to the subscriber request. An Internet TV set with a RADSL transmission device comprising a RADSL device (RADSL-COT). The method of claim 1, wherein the subscriber-side RADSL device (RADSL-RT), A first chip bridge providing an interface corresponding to the subscriber network; Inserting overhead into the subscriber request packet data transmitted through the first chip bridge to generate a frame of upstream data, and removing overhead from a frame of the received downstream data and providing the frame to the first chip bridge; 1 frame processing unit; A first modem which modulates the frame of the upstream data and demodulates the received frame of the downstream data to the first frame processor; And A first analog before / after converting the frame of the modulated upstream data into an analog signal for transmission over the telephone line, and converting the downstream data signal received through the telephone line into digital data and providing it to the first modem An Internet TV set having a RADSL transmission device comprising a processing unit (AFE; Analog Front End). The method of claim 1, wherein the operator-side RADSL device (RADSL-COT) A second chip bridge providing an interface corresponding to the Internet network; Inserting overhead into packet data of the station transferred through the second chip bridge to generate a frame of downstream data, and removing overhead from a frame of the received upstream data and providing the frame to the second chip bridge. 2 frame processing unit; A second modem which modulates the frame of the downstream data and demodulates the received frame of the upstream data to the frame processor; And A second analog before / after converting the frame of the modulated downstream data into an analog signal for transmission over the telephone line, and converting the upstream data signal received through the telephone line into digital data and providing it to the second modem Internet TV set having a RADSL transmission device, characterized in that it comprises a processing unit (AFE). 2. The Internet TV set with a RADSL transmission device according to claim 1, wherein the overhead includes a channel change request signal of a subscriber. The method of claim 2, wherein the first frame processing unit, A first sync head inserter for inserting sync and error detection data into the packet data of the upstream data; A first overhead inserter which inserts an overhead into output data of the first synchead inserter to form a frame; A first transmission buffer for temporarily storing the frame and outputting upstream data; A first synchronization detector for detecting frame synchronization of the downstream data; A first error detector for detecting a transmission error of the downstream data; And And a first receiving buffer configured to temporarily store only payloads by removing the intra-frame overhead of the downstream data. The method of claim 3, wherein the second frame processing unit, A second sync head inserter for inserting sync and error detection data into the packet data of the downstream data; A second overhead inserting unit inserting an overhead into output data of the second sync head inserting unit to form a frame; A second transmission buffer configured to temporarily store the frame and output downstream data; A second synchronization detector for detecting frame synchronization of the upstream data; A second error detector detecting a transmission error of the upstream data; And And a second receiving buffer configured to temporarily store only payloads by removing the intraframe overhead of the upstream data.