KR100793187B1 - Broadcasting signal receiving device and processing method thereof - Google Patents

Abstract

Disclosed are a broadcast signal receiving apparatus and a broadcast signal processing method thereof. In accordance with another aspect of the present invention, a broadcast signal receiving apparatus includes a tuner for receiving a broadcast signal, a video output unit for processing and outputting a video signal among broadcast signals received by the tuner, and an audio output for processing and outputting an audio signal among the broadcast signals. An apparatus for receiving broadcast signals, comprising: an image output selection unit for receiving an image on / off control signal selected by a user, an image data buffer for buffering a signal processed image signal, and transmitting the image signal to an image output unit; A synchronization processor for transmitting the audio signal synchronized with the buffered video signal to the audio output unit, and when the video off control signal is received from the video output selection unit, the video signal stored in the video data buffer is erased to transmit the video signal to the video output unit. It includes a video signal controller for blocking. As a result, the broadcast signal receiving apparatus can control the output of the image on / off by the user's selection.

Broadcast signal, video signal, audio signal, tuner, buffer

Description

Broadcasting signal receiving device and processing method thereof

1 is a block diagram schematically illustrating a configuration of a general broadcast signal receiving apparatus.

2 is a block diagram schematically showing the configuration of a broadcast signal receiving apparatus according to the present invention.

3 is a view illustrating a panel structure of a typical three-electrode surface discharge AC PDP as an example of a display constituting the broadcast signal receiving apparatus of FIG. 2.

4 is a schematic diagram illustrating one method used to drive the AC PDP panel of FIG. 3.

5 is a flowchart illustrating a broadcast signal processing method by the broadcast signal receiving apparatus of FIG. 2.

Explanation of symbols on the main parts of the drawings

11: channel selection unit 12: main control unit

13 tuner 14 image signal processing unit

15: audio signal processor 16: video output unit

17, 30: audio output unit 18, 32: synchronization processing unit

19, 38: power supply 20: video control unit

21: voice control unit 26: image data buffer

28: PDP panel 34: video output selection unit

36: video signal controller

The present invention relates to a broadcast signal receiving apparatus and a broadcast signal processing method, and more particularly, to a broadcast signal receiving apparatus capable of selectively outputting a video signal among received broadcast signals and reducing power consumption in that case. A broadcast signal processing method.

In general, a television receives a broadcast signal through an antenna or a wire, performs signal processing by separating a video signal and an audio signal from the received broadcast signal, and then outputs the processed video and audio signals through a display and a speaker, respectively. Output

1 is a block diagram schematically illustrating a configuration of a general broadcast signal receiving apparatus. Referring to the drawings, the broadcast signal receiving apparatus 100 includes a channel selector 11, a main controller 12, a tuner 13, an image signal processor 14, an audio signal processor 15, and an image output unit ( 16), an audio output unit 17, a synchronization output unit 18, a power supply unit 19, an image control unit 20, and a voice control unit 21.

The channel selector 11 is implemented in the form of a plurality of input keys (not shown), and a frequency channel is set to correspond to each input key or each combination of the input keys.

When any one frequency channel is selected by the channel selector 11, the main controller 12 synchronizes the frequency channel of the tuner 13 with the frequency channel selected by the channel selector 11.

The tuner 13 is a device in which an inductance and a condenser are combined, and receives a corresponding broadcast signal through the frequency channel in synchronization with a specific frequency channel among a plurality of frequency channels transmitted from various broadcast signal transmitting stations (not shown). do. At this time, the broadcast signal is composed of a video signal and an audio signal.

The video signal processor 14 separates and processes the video signal among the broadcast signals received through the tuner 13. Types of signal processing by the video signal processing unit 14 include compression and decoding processing of video data, color correction signal processing, color coordinate conversion processing, noise signal removal processing, amplification processing of video data, and the like.

The voice signal processor 15 separates the voice signal from the broadcast signal received through the tuner 13 and processes the signal. Types of signal processing by the voice signal processing unit 15 include compression and decoding processing of voice data, noise signal removing processing, amplification processing of voice data, and the like.

The video signal signal-processed by the video signal processor 14 is output as an image through the video output unit 16, and the audio signal signal-processed by the audio signal processor 15 is sound through the audio output unit 17. Is output. In this case, a time delay may occur between the video signal output through the video output unit 16 and the audio signal output through the audio output unit 17. In order to prevent such a phenomenon, the synchronization output unit 18 synchronizes the video signal output through the video output unit 16 and the audio signal output through the audio output unit 17 with each other.

The power supply unit 19 supplies power to each component of the broadcast signal receiving apparatus 100. However, in general, since the video output unit 16 and the audio output unit 17 consume the highest power in the broadcast signal receiving apparatus 100, the image output unit 16 and the audio output unit 17 are supplied to the image output unit 16 and the audio output unit 17 in the drawing. Only the power supply is displayed.

The image adjusting unit 20 allows the user to adjust the color of the image output through the image output unit 16, the size of the screen, the movement of the screen, and the like. The image adjusting unit 20 may be implemented in the form of an input key (not shown) or in the form of an OSD (On Screen Display).

The voice controller 21 allows the user to adjust the size, height, and the like of the sound output through the voice output unit 17. Like the image controller 20, the voice controller 21 may be implemented in the form of an input key (not shown) or in the form of an OSD.

As described above, the general broadcast signal receiving apparatus separates the received broadcast signal into a video signal and an audio signal, and then outputs them through the video output unit and the audio output unit, respectively.

However, such a broadcast signal receiving apparatus must always output both a video signal and an audio signal at the same time, and there is a problem of outputting an image by driving the video output unit even when the user needs only the audio signal without the video signal. .

In particular, CRT (Cathode Ray Tube), PDP (Plasma Display Panel), etc., which are the general forms of the image output unit, consume the highest power in the broadcast signal receiving apparatus, and thus only the audio signal is output without the need to output the video signal. Even in this case, there is a problem of consuming unnecessary power by driving the image output unit.

The present invention was devised to solve the above problems, and is capable of selectively outputting an image signal among received broadcast signals, and in this case, a broadcast signal receiving apparatus and a broadcast signal processing method capable of reducing power consumption. The purpose is to provide.

In accordance with another aspect of the present invention, a broadcast signal receiving apparatus includes a tuner for receiving a broadcast signal, an image output unit for processing and outputting a video signal among the broadcast signals received by the tuner, and the broadcast signal. A broadcast signal receiving apparatus having an audio output unit for processing and outputting an audio signal, the broadcast signal receiving apparatus comprising: an image output selection unit receiving an image on / off control signal selected by a user; An image data buffer for buffering the signal processed image signal and transmitting the buffered image signal to the image output unit; A synchronization processor for transmitting an audio signal synchronized with the video signal buffered by the video data buffer to the audio output unit; And an image signal controller configured to block transmission of the image signal to the image output unit by erasing the image signal stored in the image data buffer when the image off control signal is received from the image output selector.

Preferably, the broadcast signal receiving apparatus further includes a power supply unit for selectively supplying power to the image output unit. In this case, when an image off control signal is received from the image output selection unit, the image signal controller controls the power supply unit to cut off power supplied to the image output unit.

The image output unit may include a plasma display panel.

On the other hand, the broadcast signal receiving apparatus according to the present invention, the step of separating the video signal and the audio signal of the broadcast signal received by the tuner, respectively signal processing; Buffering the signal processed image signal; Synchronizing the video signal buffered by the buffering step with the signal processed audio signal; Determining whether an image off control signal is input by a user; And if it is determined that the video off control signal is input by the determining step, erasing the video signal buffered by the buffering step, and outputting the processed audio signal. to provide.

Preferably, the broadcast signal processing method further includes the step of shutting off the power supplied to the display when it is determined that the video off control signal is input by the determining step.

As a result, the apparatus for receiving broadcast signals according to the present invention can selectively output video signals among the received broadcast signals, and in this case, power consumption can be reduced.

Hereinafter, a broadcast signal receiving apparatus and a broadcast signal processing method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram schematically showing the configuration of a broadcast signal receiving apparatus according to the present invention. Referring to the drawings, the broadcast signal receiving apparatus 200 according to the present invention includes a channel selector 11, a main controller 12, a tuner 13, a video signal processor 14, an audio signal processor 15, Image control unit 20, audio control unit 21, image data buffer 26, PDP panel 28, audio output unit 30, synchronization processing unit 32, image output selection unit 34, image signal A control unit 36 and a power supply unit 38 are provided. Here, the channel selector 11, the main controller 12, the tuner 13, the video signal processor 14, the audio signal processor 15, the image controller 20, and the voice controller 21 are illustrated in FIG. Since the configuration and function of the general broadcast signal receiving apparatus 100 of 1 are the same, the same member numbers are assigned and the description thereof will be omitted.

The image data buffer 26 buffers the image signal processed by the image signal processor 14 and transmits the buffered image signal to the PDP panel 28. At this time, the video data buffer 26 is a temporary storage device that temporarily stores the video signal signaled by the video signal processor 14, and synchronizes the video signal and the audio signal by the synchronization processor 32 described below. In addition to the purpose of signal processing, it is used for erasing to quickly erase contents stored by an external signal.

Here, it is preferable that the time delay from being buffered by the image data buffer 26 to being transmitted to the PDP panel 28 and displayed as an image is so small as to be negligible.

The PDP panel 28 displays the video signal received from the video data buffer 26 as an image.

3 is a schematic diagram illustrating a panel structure of a typical three-electrode surface discharge AC PDP as an example of a display constituting the broadcast signal receiving apparatus of FIG. 2. Referring to the drawings, the conventional PDP panel structure includes an upper plate 1 and a lower plate 2.

Here, the upper plate 1 includes a plurality of sustain electrodes Z and scan electrodes Y patterned on substantially parallel to the plate glass, an upper plate dielectric layer 8 on which wall charges generated during plasma discharge are accumulated, and A protective layer 9 is provided to prevent damage to the top dielectric layer 8 due to sputtering generated during plasma discharge and to increase discharge efficiency of secondary electrons.

The sustain electrode Z and the scan electrode Y are each a wide linear transparent electrode (not shown) made of an indium-tin oxide (ITO) thin film (not shown), and at least one of Ag, Cu, and Cr. It consists of a narrow linear bus electrode (not shown) formed of one or more metal thin films. The bus electrode is arranged at the far end of the transparent electrode far from the surface discharge gap. By employing such an electrode structure, the light emission efficiency can be increased by widening the surface discharge area while minimizing light shielding.

The lower plate 2 is applied in parallel with the address electrode X arranged to intersect the sustain electrode Z and the scan electrode Y, the partition wall 3 for partitioning each discharge cell, and the address electrode X. A phosphor 4 applied to the side and bottom of the partition 3 to generate visible light, and a lower dielectric layer 5 covering the address electrode X and serving as a reflective layer.

The upper plate 1 and the lower plate 2 of the illustrated panel are joined. By joining, the partition 3 has a discharge space at the site where the sustain electrode Z and the scan electrode Y of the upper plate 1 and the address electrode X of the lower plate 2 cross each other. A plurality of unit discharge cells are formed. The interior of the bonded panel is evacuated, and the discharge space between the upper plate 1 and the lower plate 2 is filled with an inert gas including a binary or ternary inert gas such as xenon (Xe) gas.

The three-electrode surface discharge PDP configured as described above is driven as follows. First, an address discharge is generated between the scan electrode Y and the address electrode X to accumulate wall charges on the surface of each electrode. Subsequently, by exciting the phosphor 4 with vacuum ultraviolet rays generated by sustain discharge between the scan electrode Y and the sustain electrode Z, visible light is emitted from the phosphor 4 to the outside through the upper plate 1.

The three-electrode alternating surface discharge PDP performs time division driving by dividing one frame into several subfields having different number of emission times in order to realize gray level of an image. Each subfield further includes an initialization period R for uniformly causing discharge, an address period (or writing period) W for selecting discharge cells, and a sustain period (discharge sustain period) for implementing gradation according to the number of discharges. Is divided into (S). For example, when the image is to be displayed in 256 gradations, a frame period (16.66 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8 as shown in FIG. 4. do. In addition, each of the eight subfields SF1 to SF8 is divided into a reset and an address period and a sustain period. Here, the reset and address periods of each subfield are the same for each subfield, while the sustain period increases at a rate of 2 ⁿ (n = 0, 1, 2, 3, 4, 5, 6, 7) in each subfield. And the length of the discharge sustain period corresponding to 2 ⁰ , 2 ¹ , 2 ² , 2 ³ , 2 ⁴ , 2 ⁵ , 2 ⁶ , 2 ⁷ . As described above, since the sustain period is changed in each subfield, gray levels of an image can be realized.

Here, in the reset period, a reset pulse is supplied to the scan electrode Y to cause reset discharge. In the address period, a scan pulse is supplied to the scan electrode Y and a data pulse is applied to the address electrode X. As the voltage difference between the scan pulse and the data pulse and the wall voltage generated during the reset period are added, an address discharge is generated in the cell to which the data pulse is applied. During address discharge, wall charges are formed in the dielectric layers 5 and 8 of the upper plate 1 and the lower plate 2, respectively. In the sustain period, sustain pulses are alternately applied to all scan electrodes Y and sustain electrodes Z. FIG. Then, the wall voltage and the sustain pulse in the cell are added to the cell selected by the address discharge, and a sustain discharge is generated in the form of surface discharge between the sustain electrode Z and the scan electrode Y whenever the sustain pulse is applied. The address discharge and the sustain discharge of the AC surface discharge PDP driven in this way require a high voltage of several hundred volts or more. Although the drawings illustrate and illustrate that an image signal is output as an image through the PDP panel 28, the present invention is not limited thereto. Instead, the CRT (Cathode Ray Tube) and LCD (Liquid Crystal Display) panels may be used instead of the PDP panel 28. It may be replaced by an image output unit.

The voice output unit 30 outputs the voice signal signal-processed by the voice signal processor 15 as sound. In this case, a time delay may occur between the video signal buffered through the image data buffer 26 and the audio signal output through the audio output unit 30. In order to prevent such a phenomenon, the synchronization processor 32 synchronizes the video signal buffered by the video data buffer 26 and the audio signal output through the audio output unit 30 to each other, thereby causing the video data buffer 26 to be synchronized with each other. Prevents time delay between the video signal buffered by the audio signal and the audio signal output through the audio output unit 30.

The image output selector 34 may be implemented in the form of an input key (not shown) on the outer surface of the broadcast signal receiving apparatus 200 or in the form of an input key on a remote controller (not shown). It allows the user to control on / off the displayed image of the PDP panel 28.

The image signal controller 36 receives an image on / off control signal of the user input through the image output selector 34. At this time, when the image off control signal is received from the image output selection unit 34, the image signal control unit 34 removes the image signal erasing signal so that the image signal temporarily stored in the image data buffer 26 is erased. To be sent). Such erasing of the video signal is preferably performed continuously while the user keeps the input key for inputting the video off control signal ON.

In addition, the image signal control unit 36 controls the power supply unit 38 to cut off the power supplied to the PDP panel 28 when the image off control signal is received from the image output selection unit 34.

In the drawing, although the image signal controller 36 controls both the image data buffer 26 and the power supply 38, the present invention is not limited to the illustrated drawings. It may be configured to control only.

5 is a flowchart illustrating a broadcast signal processing method by the broadcast signal receiving apparatus of FIG. 2. With reference to the drawings will be described in detail a broadcast signal processing method by the broadcast signal receiving apparatus 200 according to the present invention.

The broadcast signal received by the tuner 13 is divided into a video signal and an audio signal, and the video signal among the separated broadcast signals is signal-processed by the video signal processor 14. In addition, the voice signal of the separated broadcast signal is signal-processed by the voice signal processor 15 (S101).

The image data buffer 26 buffers the image signal signal-processed by the image signal processor 14 (S103). At this time, the image data buffer 26 is implemented to instantaneously erase the image signal buffered by an external signal.

The synchronization processor 32 synchronizes the video signal and the audio signal so that a time difference does not occur between the video signal buffered by the video data buffer 26 and the audio signal transmitted to the audio output unit 30 (S105). . In this case, it is assumed that the time delay of the voice signal does not occur in the process of being transmitted from the voice signal processor 15 to the voice output unit 30.

When the user inputs an image off control signal through the image output selector 34 (S107), the image signal controller 36 controls the image data buffer 26 to erase the buffered image signal, and process the signal-processed voice. The signal is output through the voice output unit 30 (S109). In addition, the image signal controller 36 controls the power supply unit 38 to cut off the power supplied to the PDP panel 28 (S111). In this case, although the broadcast signal receiving apparatus 200 includes both the image data buffer 26 and the power supply unit 38, the image data buffer 26 for the purpose of erasing the image signal may be omitted. In this case, the image signal controller 36 may be implemented to control only the power supply 38.

When the video off control signal is not inputted through the video output selector 34, the video signal buffered by the video data buffer 26 and the audio signal signal processed by the audio signal processor 15 are respectively PDP panels. 28 and the audio output unit 30 output the image and sound (S113).

Thus, when the user does not want to output the image, the broadcast signal receiving apparatus 200 according to the present invention can select and output only the audio signal among the broadcast signals, in which case the power supplied through the display panel is directly output. By cutting off, the power consumption can be prevented.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the present invention is not limited to the specific embodiments of the present invention without departing from the spirit of the present invention as claimed in the claims. Anyone skilled in the art can make various modifications, as well as such modifications are within the scope of the claims.

According to the present invention, the broadcast signal receiving apparatus can control the output of the video on / off according to the user's selection, and prevents unauthorized power consumption by outputting the video even when only the voice of the broadcast signal is listened to. You can do it.

In addition, the broadcast signal receiving apparatus according to the present invention can directly cut off the power supplied to the display, thereby preventing the possibility that power is consumed unprotected even when the image is removed from the broadcast signal and only the voice is output.

Claims (6)

A broadcast signal receiving apparatus having a tuner for receiving a broadcast signal, an image output unit for processing and outputting a video signal among the broadcast signals received by the tuner, and a voice output unit for processing and outputting a voice signal among the broadcast signals. To An image output selection unit configured to receive an image on / off control signal selected by a user; An image data buffer for buffering the signal processed image signal and transmitting the buffered image signal to the image output unit; A synchronization processor for transmitting an audio signal synchronized with the video signal buffered by the video data buffer to the audio output unit; And And a video signal controller for canceling transmission of the video signal to the video output unit by erasing the video signal stored in the video data buffer when the video off control signal is received from the video output selection unit. Receiver. The method of claim 1, Further comprising a power supply for selectively supplying power to the image output unit, And receiving the image off control signal from the image output selection unit, the image signal control unit controlling the power supply unit to cut off power supplied to the image output unit. The method of claim 1, And the image output unit comprises a plasma display panel. A broadcast signal receiving apparatus having a tuner for receiving a broadcast signal, an image output unit for processing and outputting a video signal among the broadcast signals received by the tuner, and a voice output unit for processing and outputting a voice signal among the broadcast signals. To An image output selection unit configured to receive an image on / off control signal selected by a user; A synchronization processor for synchronizing the signal-processed video signal and audio signal; A power supply unit supplying power to the image output unit and the audio output unit; And And a video signal controller configured to control the power supply unit such that when the video off control signal is received from the video output selection unit, the power supplied to the video output unit is cut off and the synchronized audio signal is output through the audio output unit. Broadcast signal receiving apparatus, characterized in that. Separating and processing a video signal and an audio signal among broadcast signals received by the tuner; Buffering the signal processed image signal; Synchronizing the video signal buffered by the buffering step with the signal processed audio signal; Determining whether an image off control signal is input by a user; And And determining that the video off control signal is input by the determining step, erasing the video signal buffered by the buffering step, and outputting the processed audio signal. Treatment method. The method of claim 5, If it is determined that the image off control signal is input by the determining step, cutting off the power supplied to the display.

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