KR20030079514A - Digital TV system for multi-visual - Google Patents

Abstract

PURPOSE: A digital TV system for multi view is provided to view different channels at different places at the same time by using a TV main body capable of receiving and multi-tuning broadcasting signals and a plurality of auxiliary receivers having only display function. CONSTITUTION: A main receiver simultaneously tunes a plurality of channels for decoding in real time. A plurality of auxiliary receivers view broadcasting contents of specific channels only through the main receiver. The main receiver generates identifiers capable of discriminating the plurality of auxiliary receivers and includes the generated identifiers in header information. The main receiver inserts broadcasting signals of the channel requested by the auxiliary receiver corresponding to the identifier next to the header information and transmits the same to the plurality of auxiliary receivers. The plurality of auxiliary receivers transmit the channel wanted by a user to the main receiver with own identifiers, and parses the header information from the data transmitted from the main receiver for selecting broadcasting contents of the channel consistent with own identifiers to display the same.

Description

Digital TV system for multi-viewing {Digital TV system for multi-visual}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital TV system for multi-viewing that allows a plurality of users to simultaneously watch TV at different locations by using a plurality of auxiliary TV terminals and a TV body having a multi-tuning function.

In general, among the numerous contents provided by digital broadcasting, the content available to one TV set at a time is limited to one.

At this time, there may be a difference in opinion about channel selection among members who use the TV set, which may become a problem as the amount of content increases.

For this reason, certain households may purchase several TV sets to bridge the gap between users. In this case, there is a problem in that the volume and purchase cost of the TV set become large. In addition, there is a problem in that an additional cost is generated for each set when watching a cable, a satellite broadcast, etc., which has a restriction condition to pay for each receiver unit in addition to the airwaves.

The present invention is to solve the above problems, an object of the present invention by using a plurality of auxiliary receivers and a TV main body having a multi-tuning function in the same time zone, a plurality of users using different content while increasing the cost or increase the volume To provide a digital TV system for multi-view to minimize the.

1 is a block diagram illustrating a digital TV system for multi-viewing according to the present invention.

FIG. 2 illustrates an example in which a return channel module having a hub function is configured in the main receiver of FIG. 1.

3 illustrates an example of transmitting an identifier generated by the return channel module of FIG. 2 to an auxiliary receiver.

4 is a detailed block diagram of the codecs of the primary and secondary receivers of FIG.

According to an aspect of the present invention, there is provided a digital TV system for multi-viewing, comprising: a main receiver for simultaneously tuning a plurality of channels and decoding them in real time; And a plurality of secondary receivers capable of viewing broadcast content of a specific channel only through the primary receiver, wherein the primary receiver simultaneously tunes and decodes a plurality of channels requested by the plurality of secondary receivers in real time. After generating identifiers for distinguishing the secondary receiver, the broadcast signal of the channel requested by the auxiliary receiver corresponding to the identifier and included in the header information is inserted after the header information, and transmitted to the plurality of secondary receivers. The receiver transmits a channel desired by the user to the main receiver along with its identifier, and parses the header information from the data transmitted from the main receiver to select and display only the broadcast content of the channel matching the identifier. .

The primary receiver includes a broadcast signal processor for simultaneously tuning and decoding a plurality of channels requested by the plurality of auxiliary receivers in real time, and a return channel module including a hub for generating a virtual identifier for distinguishing the plurality of auxiliary receivers. The virtual identifier output through the return channel module is included in header information, and the header information and the corresponding broadcast content output from the broadcast signal processor are synthesized and converted into a format suitable for an auxiliary receiver, and then output to a plurality of auxiliary receivers. It comprises a network connection for receiving data output from the auxiliary receiver.

The auxiliary receiver converts the channel information and its identifier desired by the user into a format suitable for the main receiver and outputs the data to the main receiver or receives data output from the main receiver, and from the data transmitted through the network connection. An identifier division and addition unit for parsing header information and classifying its identifier and selecting only broadcast content corresponding to its identifier, and a display unit for displaying the broadcast content selected by the identifier division and addition unit. It features.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, By the technical spirit of the present invention described above and its core configuration and operation is not limited.

1 is a block diagram illustrating a digital TV system for multi-viewing according to an embodiment of the present invention, and includes a TV main body capable of directly receiving a broadcast signal, that is, a main receiver, and a plurality of auxiliary contents capable of viewing broadcast content only through the main receiver. It consists of receivers 1-N.

The main receiver is a multi-tuner capable of simultaneously selecting a plurality of channels from a broadcast signal, a multi-processing unit which processes a plurality of channels tuned by the multi-tuner in real time, and controls to exchange data between the main receiver and the auxiliary receiver. Is configured to include a codec.

Each of the auxiliary receivers includes a codec and a display device that can exchange data with the primary receiver. The auxiliary receiver may be installed by using a codec card in a computer.

In addition, the multi-tuner of the main receiver may replace its function by combining several existing tuners, or may be configured as a simple tuner using various multiplexing methods (eg, time multiplexing).

The multi-processing unit has a function of simultaneously processing in real time the content received from the multiple channels tuned through the multi-tuner. To this end, the multi-processing unit includes a demultiplexer, an A / V decoder, various software engines for a digital broadcasting service, a conditional access module, and the like. The limited access module may decode various broadcast signals in real time.

A codec is required for the primary receiver and the secondary receiver to exchange data between the primary receiver having all modules for receiving broadcast and processing data and the secondary receiver having only a display function through an interface with the primary receiver. The codec supports the transmission standard between the primary receiver and the secondary receiver.

In this case, a standard for data transmission between the main receiver and the auxiliary receiver may use a conventional coaxial line or a wireless LAN standard. When using a coaxial line, which is a wired transmission, stability is guaranteed, and when using a wireless LAN, a wireless LAN can be expected to have various effects connected with a home network system. In the present invention, no limitation is placed on such transmission lines.

In addition, the primary receiver needs a method for distinguishing a plurality of secondary receivers in order for a specific secondary receiver to transmit data of a desired channel.

According to an embodiment of the present invention, the primary receiver and the secondary receiver exchange data through a return channel and generate an identifier for distinguishing a plurality of secondary receivers.

That is, when the main receiver is connected to the general telephone network, the Internet network, and the satellite network as the return channel of the digital broadcasting receiver, a satellite network return channel module, a telephone network return channel module, and an internet network return channel module for connecting to the network are connected to the main receiver. exist.

In this case, the return channel of the secondary receiver uses a channel of the primary receiver rather than using a different channel. That is, the secondary receiver shares the identifier (Receiver ID, Caller ID, IP Address) of the primary receiver.

In such a system, the return channel module of the primary receiver includes a hub for the secondary receiver as shown in FIG. 2.

The hub has a similar operation to a hub that is designed to be used by multiple computers with one IP address used in the existing Internet network. That is, it generates an identifier of the secondary receiver by itself and distinguishes the secondary receivers therewith.

In this way, the virtual identifier generated by the hub module of the primary receiver is used as the identifier of the secondary receiver for the return channel.

When transmitting data from the primary receiver to the secondary receiver, a virtual identifier is included in the header information as shown in FIG. 3, and data of a predetermined length prescribed in the codec is transmitted in a time division or frequency division manner.

That is, data transmitted from the primary receiver to the secondary receiver is composed of header information and a broadcast signal. The broadcast signal is raw data that appears on an actual screen. If the data is data broadcast, the data has passed through the software engine of the corresponding format.

In this case, the auxiliary receiver may distinguish its own data through code division, frequency division, and the like. In addition, the auxiliary receiver may transmit its own data through code division, frequency division, and the like, even when data is transmitted to the primary receiver.

4 is a detailed block diagram of a codec of a primary receiver and an auxiliary receiver when configuring a digital TV receiver for multi-view using the above-described return channel and a virtual identifier.

Referring to FIG. 4, the codec of the main receiver distinguishes and generates a virtual identifier, a buffer for temporarily storing the virtual identifier of the return channel module and the channel data output from the broadcast signal processor, and the virtual identifier and the corresponding channel. It is configured to include a network connection to convert the data to the format of the auxiliary receiver to output to the auxiliary receiver or to receive data from the auxiliary receiver. Here, the multi tuner and the multi processor are called broadcast signal processors.

The return channel module includes a return channel module network connection unit and a hub.

The hub generates a virtual identifier when transmitting the received broadcast signal to a plurality of auxiliary receivers, and when the auxiliary receiver requests a broadcast signal of a specific channel, the hub analyzes the virtual identifier transmitted by the auxiliary receiver and requests the broadcast signal. Separate

The return channel network connection unit is a module for connecting to the network when the main receiver is connected to a telephone network, an internet network, a satellite network, etc., and transmits an identifier of the corresponding main receiver to the network.

The codec of the auxiliary receiver receives a data output from the main receiver or outputs data to the main receiver, and separates the identifier from the data received through the network connection to distinguish the identifier for receiving the broadcast signal of the corresponding channel. And an adder, a buffer configured to temporarily store channel data output from the identifier and output the display for display, a display unit to display the channel data output from the buffer on a screen, and the network connection unit and an identifier. And a control unit for controlling the addition unit, the buffer, and the display unit.

That is, the broadcast signal processing unit of the primary receiver simultaneously tunes a plurality of channels desired by the plurality of auxiliary receivers, demodulates them in real time, and outputs them to the network connection through a buffer.

At this time, the hub of the return channel module generates the virtual identifier and outputs it to the network connection through the buffer.

The network access unit of the primary receiver includes the virtual identifier in a header and inserts a broadcast signal of a channel corresponding to the virtual identifier into the rear part of the header to a plurality of auxiliary receivers, and then synthesizes the data synthesized in this process. The secondary receiver converts the desired format into a plurality of secondary receivers.

Then, each secondary receiver selects and displays only the broadcast signal of the channel that matches its identifier.

For example, secondary receiver 1 is assigned a virtual identifier A, and the secondary receiver 1 requests a broadcast signal for channel 11, secondary receiver 2 is assigned a virtual identifier B, and the secondary receiver 2 for channel 7 Suppose you have requested a broadcast signal.

Then, the secondary receiver 1 and the secondary receiver 2 transmits this information to the primary receiver through the network connection unit together with its virtual identifier generated by the identifier division and addition unit.

After receiving the data of the auxiliary receiver through the network connection, the primary receiver detects which channel is requested from which secondary receiver by identifying identifiers at the hub and outputs the detected information to the broadcast signal processor.

Then, the broadcast signal processor of the main receiver simultaneously tunes the broadcast signals of the channel 11 and the channel 7 and decodes them in real time, and outputs them to the network access unit together with the virtual identifier generated by the hub.

The network access unit of the main receiver includes the virtual identifier A in the header information, inserts a broadcast signal for channel 11 after the header including the virtual identifier A, and broadcasts the channel 7 after the header including the virtual identifier B. After inserting the signal, it is converted into a format suitable for the auxiliary receiver and output to the auxiliary receiver.

Then, in the case of the auxiliary receiver 1, the virtual identifier A is separated from the header information, only data following the header including the virtual identifier A is selected, and then output to the display through a buffer. Therefore, the auxiliary receiver 1 can watch the broadcast signal of the channel 11. Similarly, the auxiliary receiver 2 can watch the broadcast signal of the channel 7 at the same time. The other auxiliary receiver performs the same process to display the broadcast of the requested channel.

As such, the present invention generates an identifier that must exist for the return channel configuration of the secondary receiver in the hub of the primary receiver and uses it as an interface identifier between the primary receiver and the secondary receiver.

To this end, a hub for generating an identifier for distinguishing a plurality of auxiliary receivers exists in the return channel module of the primary receiver, and the virtual identifier generated in the hub is added to the header information to be used as an identifier of the auxiliary receiver.

In this case, the data transmission / reception method may use time division or frequency division according to the implementation of the interface network.

As described above, according to the digital TV system for multi-viewing according to the present invention, a single TV main body capable of receiving broadcast signals and multi-tuning and a plurality of auxiliary receivers having only display functions can be used simultaneously in different places. You can watch other channels. Therefore, when multiple users want to watch different channels in one home, it is not necessary to purchase several TV sets to solve them, so it is possible to obtain a considerable effect on volume and cost, and pay for each receiver unit. There is an effect that additional costs are not incurred even when watching a broadcast having a restriction condition.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (3)

A main receiver for simultaneously tuning a plurality of channels and decoding them in real time; And It consists of a plurality of auxiliary receivers that can watch the broadcast content of a specific channel only through the primary receiver, The primary receiver simultaneously tunes and decodes a plurality of channels requested by the plurality of secondary receivers in real time, generates identifiers for distinguishing the plurality of secondary receivers, and includes the identifiers in header information and corresponds to the identifiers. Inserting a broadcast signal of a channel requested by an auxiliary receiver after the header information and transmitting the broadcast signal to a plurality of auxiliary receivers, The secondary receiver transmits a channel desired by the user to the primary receiver along with its identifier, parses header information from the data transmitted from the primary receiver, and selects and displays only broadcast content of a channel matching the identifier. Digital TV system for multi viewing. The method of claim 1, wherein the main receiver A broadcast signal processor for simultaneously tuning and decoding a plurality of channels requested by the plurality of auxiliary receivers in real time; A return channel module having a hub for generating a virtual identifier for distinguishing the plurality of auxiliary receivers; The virtual identifier output through the return channel module is included in the header information, the header information and the corresponding broadcast content output from the broadcast signal processor are synthesized, converted into a format suitable for an auxiliary receiver, and output to a plurality of auxiliary receivers, And a network connection unit for receiving data output from the auxiliary receiver. The method of claim 1, wherein the auxiliary receiver A network connection unit converting channel information and its identifier desired by a user into a format suitable for a main receiver and outputting the data to the main receiver or receiving data output from the main receiver; An identifier division and addition unit for parsing the header information from the data transmitted through the network connection unit, and identifying only the broadcast content corresponding to the identifier of the identifier; And a display unit for displaying the broadcast content selected by the identifier division and addition unit.