KR101625675B1 - Digital broadcasting receiver capable of selecting multi channel - Google Patents

Abstract

The present invention relates to a multi-channel selectable digital broadcast receiver capable of selecting and receiving multiple channels.

The present invention provides a tuner comprising: a tuner for tuning at least one channel of a broadcast signal received through an antenna; A switching unit for separating the broadcasting signals of the tuned channel into two or more and switching the broadcasting signals; At least one demodulator for receiving and demodulating the switched broadcast signal; At least one output unit for outputting a demodulated broadcast signal in each of the demodulation units; And a controller for controlling operations of the tuner unit, the switching unit, the demodulator unit, and the output unit, respectively. Channel digital broadcast receiver.

Digital broadcasting receiver, broadcasting signal, tuner, channel, demodulation, switching

Description

[0001] DIGITAL BROADCASTING RECEIVER CAPABLE OF SELECTING MULTI CHANNEL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a multi-channel digital broadcasting receiver, and more particularly, to a multi-channel digital broadcasting receiver capable of selecting and receiving multiple channels.

Generally, a digital broadcasting receiver is a device for selecting and receiving a digital broadcasting, such as a digital satellite receiver, a digital terrestrial receiver, a digital cable receiver, and a DMB receiver. Digital broadcasting refers to a system for compressing and transmitting digital video and audio data using a predetermined compression algorithm, for example, a hybrid coding algorithm, and restoring compressed and transmitted video and audio data to original data to provide various broadcast data to viewers do. Such digital broadcasting receivers are becoming increasingly complicated and used in various products in accordance with the trend of popularization and upgrading. Recently, digital broadcasting receivers selectively receiving multiple channels have been proposed.

1 is a block diagram showing an example of a conventional digital broadcast receiver.

1, the conventional digital broadcast receiver 10 includes tuners 12 and 22, demodulators 13 and 23, and output units 14 and 24, respectively, for simultaneously selecting two channels. . The tuners 12 and 22 tune at least one channel set among the broadcast signals received via radio waves via the antennas 11 and 21. [ The demodulators 13 and 23 demodulate the broadcast signal of the tuned channel and output an audio / video (A / V) signal through the output units 14 and 24. In the conventional digital broadcast receiver 10, each of the tuners 12 and 22 independently operates to tune a broadcast signal of a different channel among the received broadcast signals. For example, if the KBS satellite broadcasting channel is tuned in the first tuner 12, the KBS phase broadcasting is output at the first output terminal 14 and the second output terminal 24 is tuned in the European satellite broadcasting channel at the second tuner 22, The European satellite broadcast is output. At this time, the European satellite broadcast can not be selected and received through the first output terminal 14, and the KBS satellite broadcast can not be selected and received through the second output terminal 24.

Therefore, in the related art, when a KBS satellite broadcast is watched over a specific channel while recording the KBS satellite broadcast through another channel, or when another European satellite broadcast is recorded, and when a KBS satellite broadcast is viewed through a specific channel, The tuning operation must be separately performed in the tuner. In this tuning, a slight time delay may occur. Since the signal line from the antenna to the output part is separately added to the channel, the circuit becomes complicated, There is a problem that it is accompanied by the spatial restriction of the PCB to be implemented.

The present invention relates to a digital broadcast receiver having a multi-channel selectable function for enabling selection and reception of multiple channels.

The present invention provides a tuner comprising: a tuner for tuning at least one channel of a broadcast signal received through an antenna; A switching unit for separating the broadcasting signals of the tuned channel into two or more and switching the broadcasting signals; Two or more demodulators for receiving and demodulating the switched broadcasting signals, respectively; At least two output units outputting the demodulated broadcast signals; And a controller for controlling operations of the tuner unit, the switching unit, the demodulator unit, and the output unit, respectively. Channel digital broadcast receiver.

The tuner unit tunes one channel, and the switching unit separates the broadcast signals of the tuned one channel into two or more and switches them to different demodulators.

Also, the tuner unit tunes two or more channels, and the switching unit switches broadcast signals of the tuned two or more channels to one demodulator unit.

The switching unit switches the broadcasting signal to another demodulating unit while demodulating the broadcasting signal in one of the two or more demodulating units.

According to another aspect of the present invention, there is provided a tuner comprising: at least two tuners each tuning at least one channel of a broadcast signal received via two or more corresponding antennas; A switching unit for separating the broadcasting signals of the channels tuned by the respective tuner units into at least one or more broadcasting signals and switching the broadcasting signals; Two or more demodulation units for receiving and demodulating the switched broadcasting signal; At least two output units for outputting demodulated broadcast signals in the respective demodulation units; And a controller for controlling operations of the tuner unit, the switching unit, the demodulator unit, and the output unit, respectively. Channel digital broadcast receiver.

The two or more tuner units tune different channels, and the switching unit separates the tuned broadcast signals of the different channels into two or more, and switches them to different demodulators.

The two or more tuner units tune different channels, and the switching unit switches the broadcasting signals of the tuned different channels to one demodulator.

The switching unit switches the broadcasting signal to another demodulating unit while demodulating the broadcasting signal in one of the two or more demodulating units.

According to the present invention, it is possible to selectively receive multiple channels in a digital broadcast receiver applied to satellite broadcast, terrestrial broadcast, cable broadcast, DMB broadcast, etc. through a simple and inexpensive circuit design.

In addition, according to the present invention, while viewing a specific broadcast, it is possible to view another broadcast while recording the specific broadcast.

Further, according to the present invention, other broadcasts can be viewed using the PIP or PBP function while watching a specific broadcast.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. do.

2 is a configuration diagram of a multi-channel selectable digital broadcast receiver according to an embodiment of the present invention.

2, a digital broadcasting receiver 100 capable of selecting multiple channels according to an embodiment of the present invention includes an antenna 110, a tuner unit 120, a switching unit 130, a plurality of demodulation units 140, a plurality of output units 150, and a controller 160. The antenna 110 wirelessly receives a broadcast signal and the tuner unit 120 tunes at least one set channel among the broadcast signals received through the antenna 110. [ The switching unit 130 separates the broadcasting signals tuned in the tuner unit 120 according to the control signal of the controller 160 into two or more and switches them. The plurality of demodulators 140 receive and demodulate the broadcast signals switched by the switching unit 130, respectively. The output unit 150 outputs the demodulated broadcast signals to a TV or a PVR (Personal Video Recorder) (not shown) at a subsequent stage. The controller 160 controls the overall operation of the digital broadcast receiver 100 of the present invention. In particular, the controller 160 controls the tuner 120 to tune a channel of a specific broadcast using information input from a user via a remote controller or the like, separates the broadcast signals of the tuned channel into two or more signals, The demodulation unit 140 and the output unit 150 are provided for controlling the switching unit 130 to switch to the demodulation unit 140 and demodulating and outputting the broadcasting signal for outputting to a downstream apparatus (e.g., TV, PVR, etc.) .

According to such a configuration, the multi-channel selectable digital broadcast receiver 100 according to an embodiment of the present invention tunes one channel in the tuner unit 120 and outputs the broadcast signal corresponding to the tuned channel in the switching unit 130 And outputs a plurality of broadcast signals B11 to B1n through the demodulating unit 140 and the output unit 150 to the tuner 120 so as to broadcast the tuned channel Thereby enabling the signal to be selectively received on a plurality of channels. For example, the switching unit 130 separates a broadcasting signal of one channel tuned by the tuner unit 120 into a plurality of broadcasting signals, switches them to a specific demodulation unit 140, and outputs the B1 broadcasting signal and the B2 broadcasting signal through the output unit 150, Signal, thereby separating the same broadcast signal and simultaneously receiving two channels. As a result, the B1 broadcast signal can be viewed on a TV, for example, and the B2 broadcast signal can be recorded on a PVR. Of course, the opposite is also possible. Further, the tuner 120 tunes two or more channels, and the switching unit 130 separates two or more tuned broadcast signals of two or more channels into one or more demodulation units 140, 140 and the output unit 150, it is possible to view two satellite broadcasts through a function of a picture in picture (PIP) or a picture by picture (PBP) in one and the same TV. Here, the switching unit 130 may switch a broadcasting signal to another demodulating unit while demodulating the broadcasting signal in any one of the plurality of demodulating units 140. Thus, the user can record the broadcast through the PVR while watching the broadcast on the TV.

3 is a configuration diagram of a multi-channel selectable digital broadcast receiver according to another embodiment of the present invention.

FIG. 3 illustrates a digital broadcast receiver capable of receiving two channels according to another embodiment of the present invention. 3, the two-channel selectable digital broadcast receiver 200 according to the present invention includes two tuner units 220, a switching unit 230, two demodulators 240 and an output unit 250, And a control unit 260. Each of the tuner units 220 is for dual mode channel reception and tunes at least one of the broadcast signals received via RF through each corresponding antenna 210. The switching unit 230 separates the broadcasting signals tuned in the respective tuner units 220 according to the control signal of the control unit 260 into two or more and switches them to the demodulation unit 240 in the subsequent stage. Each demodulation unit 240 receives and demodulates each of the broadcast signals switched by the switching unit 230. The output unit 150 outputs the demodulated broadcast signal to the TV or PVR (not shown) of the subsequent stage, respectively. The controller 260 controls the overall operation of the digital broadcast receiver 200 of the present invention. In particular, the control unit 260 controls each tuner 220 to tune a channel of a specific broadcast using information input from a user via a remote controller or the like, separates the broadcast signals of the tuned channel into two or more signals, The demodulator 240 and the demodulator 240 are controlled to demodulate and output the broadcast signal to control the switching unit 230 to switch to each specific demodulator 240 and to output the demodulated signal to a device (e.g., TV, PVR, etc.) And controls the output unit 250.

With this configuration, in the multi-channel selectable digital broadcast receiver 200 according to another embodiment of the present invention, the broadcast signals of the tuned channel in the two tuner units 220 for dual mode channel reception are separated and switched It is possible to output the same broadcasting signals to different channels or to output different broadcasting signals to two channels. For example, when different broadcasting signals (for example, KBS satellite broadcasting and European satellite broadcasting) tuned in each tuner unit 220 are switched to one demodulation unit 240 and demodulated and output, respectively, in picture, or picture-by-picture (PBP), and the two demodulation units 240 are switched to demodulate and demodulate the signals, Allows the recording of European satellite broadcasts. Here, the switching unit 230 can switch the same or different broadcasting signal to another demodulating unit while demodulating the broadcasting signal in any one of the plurality of demodulating units 240. This is to allow the corresponding broadcast to be recorded through the PVR while watching the broadcast on the TV.

An example of a multiple channel selection and reception process according to broadcast signals S1, S2.S3, and S4 switched in the switching unit 230 will be described with reference to FIG. First, the switching unit 230 switches a broadcasting signal of one channel tuned by the first tuner unit at the upper stage to a specific demodulation unit (B1), and a broadcasting signal of another channel tuned by the second tuner unit at the lower stage is switched to another When switching to the demodulation unit B4, the switched broadcasting signals S1 and S4 are demodulated by the respective demodulation units 240 and then output through the respective output units 250 as a B21 broadcasting signal and a B22 broadcasting signal. In this case, it is possible to view the TV using the B21 broadcast signal and perform the recording using the B22 broadcast signal.

The switching unit 230 separates the broadcasting signals of two channels (for example, KBS satellite broadcasting and European satellite broadcasting) tuned in the first and second tuner units 240 into two, (S1 and S4 or S2 and S4) or switch to two different demodulators (S1 and S4 or S2 and S3). In the former case, it is possible to demodulate different broadcasting signals in each demodulation unit and to be able to simultaneously watch them through the PIP or PBP function on the TV. In the latter case, different broadcasting signals are separated and switched to two demodulators, respectively, and demodulated and outputted to output two broadcasting signals B21 and B22. For example, the broadcasting can be watched on TV, and at the same time, .

Although FIG. 3 shows an example for selectively receiving two broadcast channels, in another embodiment of the present invention, three or more tuner units 220 may be provided to selectively receive three or more broadcast channels . Accordingly, three or more demodulators 240 and 250 may be provided.

As described above, in the digital broadcasting receiver capable of selecting multiple channels according to the embodiments of the present invention, the tuner unit applied to the digital broadcasting receiver for satellite broadcasting, terrestrial broadcasting, cable broadcasting, and DMB broadcasting selectively receives multiple channels simultaneously . This can be achieved through relatively simple and easy circuit design. The present invention can be very usefully used when a portable communication device has been popularized and it is desired to simultaneously record while watching a broadcast.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

1 is a block diagram showing an example of a conventional digital broadcast receiver.

2 is a configuration diagram of a multi-channel selectable digital broadcast receiver according to an embodiment of the present invention.

3 is a configuration diagram of a multi-channel selectable digital broadcast receiver according to another embodiment of the present invention.

 Description of the Related Art [0002]

110, 210: antennas 120, 220:

130, 230: switching unit 140, 240:

150, 250: output unit 160, 260:

Claims (8)

A tuner unit for tuning at least one channel among broadcast signals received via an antenna; A switching unit for separating the broadcasting signals of the tuned channel into two or more and switching the broadcasting signals; Two or more demodulators for receiving and demodulating the switched broadcasting signals, respectively; At least two output units outputting the demodulated broadcast signals; And And a controller for controlling operations of the tuner unit, the switching unit, the demodulator unit, and the output unit, Wherein the tuner unit tunes one channel and the switching unit separates the broadcast signals of the tuned one channel into two or more, and switches the demultiplexed signals to different demodulators. delete delete The method according to claim 1, Wherein the switching unit switches the broadcasting signal to another demodulating unit while demodulating the broadcasting signal in any one of the two or more demodulating units. At least two tuners each tuning at least one channel of a broadcast signal received via two or more corresponding antennas, respectively; A switching unit for separating the broadcasting signals of the channels tuned by the respective tuner units into at least one or more broadcasting signals and switching the broadcasting signals; Two or more demodulation units for receiving and demodulating the switched broadcasting signal; At least two output units for outputting demodulated broadcast signals in the respective demodulation units; And And a controller for controlling the operation of each of the tuner unit, the switching unit, the demodulator unit, and the output unit, Wherein the at least two tuner units tunes different channels and the switching unit separates the tuned broadcast signals of the different channels into two or more and switches to different demodulation units. delete delete 6. The method of claim 5, Wherein the switching unit switches the broadcasting signal to another demodulating unit while demodulating the broadcasting signal in any one of the two or more demodulating units.

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