KR102099682B1 - Display apparatus and control method thereof - Google Patents

Abstract

A display device according to the present invention includes a first tuner capable of receiving a video signal of any one of a plurality of channels; A signal processing unit capable of performing a plurality of signal processing; A display unit that displays an image based on the image signal; The first tuner is controlled to receive a first video signal of a first channel, and signal processing corresponding to a reception characteristic of the received first video signal among the plurality of signal processing is determined, and the first video signal is And a control unit controlling the signal processing unit to perform the determined signal processing, and controlling the display unit to display a first image based on the processed first image signal.
Accordingly, in a display device, it is possible to improve reception performance by automatically providing signal processing suitable for a signal environment.

Description

DISPLAY APPARATUS AND CONTROL METHOD THEREOF}

The present invention relates to a display device and a control method of the display device, and more particularly, to a display device and a control method of the display device for optimal signal processing by checking a signal environment in a tuner of the display device.

A display device such as a TV receives an image signal containing a predetermined image from a broadcasting station such as digital TV broadcasting, cable TV broadcasting, etc., and performs image processing on the received image signal to output an image. In receiving such a video signal, the tuner of the display device first receives an RF (Radio Frequency) signal through an antenna and a cable, excludes unnecessary signals from the input signal, selects and amplifies only the necessary signals to amplify the frequency with an IF signal. Lowers. The IF signal is decoded by a signal demodulator and then output to TS, CVBS and I2S to show the broadcast on the TV.

As described above, when one tuner simply receives a signal and outputs it to TS, CVBS, and IS2 for broadcasting, when the sudden signal environment changes (for example, in the direction of the antenna due to changes in weather such as wind, rain, snow, etc.) Change, etc.), the viewer has the inconvenience of watching the broadcast video in which interference occurs.

Accordingly, an object of the present invention is to provide a control method of a display device for improving reception performance by automatically providing signal processing suitable for a signal environment in a display device.

The object, according to the present invention, a control method of a display device, comprising: receiving a first video signal of a first channel among a plurality of channels in a first tuner; Analyzing reception characteristics of the received first video signal; Determining signal processing corresponding to the reception characteristics among a plurality of signal processing; Performing the determined signal processing on the first video signal; And displaying the first image on the display unit based on the processed first image signal.

Here, analyzing the reception characteristics may include determining at least one of a signal strength, a bit error rate, a signal-to-noise ratio, and a carrier-to-noise ratio of the received first video signal.

Here, determining the signal processing may include determining the corresponding signal processing based on at least one of the determined signal strength, bit error rate, signal-to-noise ratio, and carrier-to-noise ratio.

Here, the step of performing signal processing may include signal processing for a first video signal while displaying a second video based on a second video signal of a first channel or another channel among the plurality of channels received from the second tuner. It may include the step of performing.

Also, the step of performing signal processing may include displaying information on at least one of the analyzed reception characteristics and the determined signal processing.

Here, the method may further include receiving a user's instruction, and determining the signal processing may include determining a corresponding signal processing based on the received user's instruction.

Here, the signal processing is, interference cancellation, forward error correction (FEC), ATV / DTV AGC Speed change, equalizer slope change, pilot size change, symbol rate detection range change, phase tracking It may include processing for at least one of a phase tracking loop gain and a frequency change.

The object is, according to the present invention, a display device comprising: a first tuner capable of receiving a video signal of any one of a plurality of channels; A signal processing unit capable of performing a plurality of signal processing; A display unit that displays an image based on the image signal; The first tuner is controlled to receive a first video signal of a first channel, and signal processing corresponding to a reception characteristic of the received first video signal among the plurality of signal processing is determined, and the first video signal is transmitted to the first video signal. It can be achieved by a display device including a control unit that controls the signal processing unit to perform the determined signal processing, and controls the display unit to display a first image based on the processed first image signal.

Here, the reception characteristics include a signal strength, a bit error rate, a signal-to-noise ratio, and a carrier-to-noise ratio of the received first video signal, and the control unit is based on at least one of a signal strength, a bit error rate, a signal-to-noise ratio, and a carrier-to-noise ratio. Corresponding signal processing can be determined.

Here, the plurality of channels may further include a second tuner that receives a second image signal of a first channel or another channel, and the controller controls the first image while displaying the second image based on the received second image signal. The signal processing unit may be controlled to perform signal processing on the image signal, and the display unit may be controlled to display the first image based on the processed first image signal.

Also, the control unit may display information on at least one of the analyzed reception characteristics and the determined signal processing on the display unit.

Here, the command receiving unit for receiving a user's command may be further included, and the control unit may determine a corresponding signal processing based on the received user's command.

Here, the signal processing is, interference cancellation, forward error correction (FEC), ATV / DTV AGC Speed change, equalizer slope change, pilot size change, symbol rate detection range change, phase tracking It may include processing for at least one of a phase tracking loop gain and a frequency change.

As described above, according to the present invention, in a display device, it is possible to improve reception performance by automatically providing signal processing suitable for a signal environment.

1 and 2 are block diagrams showing a configuration of a display device according to an embodiment of the present invention.
3 to 6 are flowcharts illustrating a method of controlling a display device according to an embodiment of the present invention.
7 and 8 illustrate a signal analysis and signal processing process of a display device according to an embodiment of the present invention.
9 and 10 illustrate a user interface of a display device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification.

Hereinafter, features of each component included in the display device according to the present invention will be described in detail with reference to FIGS. 1 and 2, and will be described with reference to FIGS. 7 to 10.

1 is a block diagram showing the configuration of a display device according to an embodiment of the present invention. As shown in FIG. 1, the display apparatus 100 includes a first tuner 110, a signal processing unit 130, an image processing unit 140, a control unit 150, and a display unit 160. In one embodiment, the display device 100 may further include a command receiving unit 170 and may be connected to the user input unit 200. The user input unit 200 may be implemented by a remote control, a keyboard, a mouse, or a smart phone. Alternatively, the user input unit 200 may also be implemented in the form of an input panel provided outside the display device 100.

The first tuner 110 receives an image signal of any one of a plurality of channels. The first tuner 110 may be provided in various formats according to a standard of a received signal or a method of implementing an image supply source and a display device, for example, a radio frequency (RF) broadcast signal or a satellite signal transmitted from a broadcasting station. It can be implemented as a receiving tuner. In addition, it can be implemented in the form of receiving a video signal connected to a peripheral video device such as a DVD or PC.

The signal processing unit 130 may perform a plurality of signal processing on the image signal received from the first tuner 110. Multiple signal processing eliminates interference for video signals, forward error correction (FEC), ATV / DTV AGC Speed change, equalizer slope change, pilot size change, symbol rate detection range change , Phase tracking loop gain, frequency change, and the like, and are not limited to this embodiment.

The image processing unit 140 processes the image signal processed by the signal processing unit 130 according to a preset image processing process. Examples of the image processing process performed by the image processing unit 140 include decoding, de-interlacing, scaling, noise reduction, and detail enhancement. The kind is not limited. The image processing unit 140 may be implemented as a system-on-chip (SOC) incorporating these various functions or an image processing board equipped with individual components capable of independently performing each process.

The display unit 160 displays an image based on the image signal output from the image processing unit 140. The implementation method of the display unit 160 is not limited, and the display unit 160 includes various PDPs (Plasma Display Panel), LCD (Liquid Crystal Display), OLED (Organic Light Emitting Diodes), and flexible displays. It can be implemented in the form.

As illustrated in FIG. 8, the control unit 150 controls the first tuner 110 to receive the first image signal of the first channel, and according to the reception characteristics of the first image signal received during the plurality of signal processing. The signal processing unit 130 is controlled to determine the corresponding signal processing and perform the determined signal processing on the first video signal. Here, the reception characteristics may include the signal strength, a bit error rate (BER), a signal-to-noise ratio (SNR), and a carrier-to-noise ratio (CN) of the received first video signal, and the control unit 150 may perform a signal. It may be implemented to determine corresponding signal processing based on at least one of intensity, bit error rate (BER), signal-to-noise ratio (SNR), and carrier-to-noise ratio (CN). At this time, the reception characteristics are not limited by the present embodiment, and include all channel information and signal environment information that may affect the reception sensitivity of the video signal, for example, terrestrial / satellite antenna direction, strong field, It may include multipath, noise caused by LTE / GSM / WIFI wireless signals, and other channel information. In addition, the control unit 150 controls the display unit 160 to display the first image based on the processed first image signal.

As another embodiment of FIG. 1, the display device 100 further includes a command receiving unit 170 and may be connected to the user input unit 200. At this time, the command receiving unit 170 may receive a user's command from the user input unit 200, for example, as shown in FIG. 9, the user's command is displayed on the TV screen while the user is watching the TV ( 161) may be made by selecting the automatic signal processing 163 menu. At this time, the control unit 150 may determine the corresponding signal processing based on the user's command received from the command receiving unit 170.

2 is a block diagram showing the configuration of a display device according to an embodiment of the present invention. FIG. 2 is another embodiment of FIG. 1, in which a second tuner 120 is further provided in addition to the first tuner 110. Here, the second tuner 120 receives a second image signal of a first channel or another channel among a plurality of channels, and the controller 150 displays a second image based on the received second image signal. The signal processing unit 130 is controlled to perform signal processing on the image signal, and the display unit 160 is controlled to display the first image based on the processed first image signal. As shown in FIG. 7, the control unit 150 allows a user watching a TV to view a second image based on the second image signal received from the second tuner while simultaneously receiving the first image received from the first tuner in real time. The signal processing unit 130 is controlled to analyze the reception characteristics of the signal and perform suitable signal processing to increase reception sensitivity. After the signal processing is finished, the user can watch the improved image by the screen changed from the second image to the first image.

Meanwhile, in FIGS. 1 and 2, the control unit 150 may display information on at least one of the analyzed reception characteristics and the determined signal processing on the display unit 160. As shown in FIG. 10, the reception characteristics of the first video signal received from the first tuner, that is, at least one of signal strength, bit error rate (BER), signal-to-noise ratio (SNR), and carrier-to-noise ratio (CN) Information may be displayed, or signal processing information determined according to reception characteristics may be displayed (not shown). In addition, information regarding channel information among reception characteristics may be displayed on the display unit 160. The channel information includes information such as adding, changing, and deleting channels and the number of channels. As another embodiment, the controller 150 may display a signal processing selection window according to environmental information such as weather on the display unit 160, and control the signal processing to be performed by the signal processing selected by the user in the selection window. You can.

Hereinafter, features of the control method of the display device according to the present invention will be described in detail with reference to FIGS. 3 to 6. 3 is a flowchart illustrating a method of controlling a display device according to an embodiment of the present invention. As shown in FIG. 3, in operation S110, the display apparatus receives the first image signal of the first channel among the plurality of channels from the first tuner, and in operation S120, receives characteristics of the received first image signal. Analyze. Here, the reception characteristic may include information on at least one of signal strength, bit error rate (BER), signal-to-noise ratio (SNR), and carrier-to-noise ratio (CN), and analysis of the reception characteristic determines whether the reception characteristic is good or not. It is to judge whether, for example, signal strength is outside the appropriate reference range. If the appropriate reference range of signal strength is a dB or more and b dB or less, it is judged that reception characteristics are not good if it is less than a dB or exceeds b dB. In addition, the bit error rate (BER) of the reception characteristics is a ratio of error bits to the total number of received signals in terms of bits, and if it is a predetermined value or more, it is determined that the reception characteristics are not good. Among the received characteristics, the signal-to-noise ratio (SNR) is the ratio of the magnitude of the signal and the magnitude of the noise, and if it is less than a predetermined value, it is considered that a lot of noise is generated and it is determined that the reception characteristic is not good. Among the reception characteristics, the carrier-to-noise ratio (CN) is a ratio of carrier level and noise in modulating and transmitting a carrier wave, which is a high-frequency current having a constant amplitude and frequency, and reception characteristics are not good if it is less than a predetermined value. Judge. This reception characteristic is not limited to the present embodiment, and may include other characteristics that may affect the reception performance of the broadcast signal. Next, in operation S130, signal processing corresponding to the reception characteristic among the plurality of signal processing is determined. Here, in the signal processing corresponding to the reception characteristic, when it is determined in operation S120 that analyzes the reception characteristic that the reception characteristic is not good, that is, the signal strength is out of an appropriate range, the bit error rate is greater than the reference value, or the signal band Signal processing that enables improved signals to be obtained despite poor reception characteristics, such as when the noise ratio (SNR) and carrier-to-noise ratio (CN) are less than the reference value, eliminating interference, forward error correction (FEC), and ATV / DTV AGC Speed change, Equalizer slope change, Pilot size change, Symbol rate detection range change, Phase Tracking Loop gain, Frequency change processing It may include, and is not limited to this embodiment. Here, the interference cancellation is a technology that removes the interference caused by the occurrence of a disturbance signal by mixing signals other than the target signal when receiving a broadcast signal, thereby obtaining an improved signal. In addition, Forward Error Correction (FEC) is a technique used to protect data from the modulation of signals, and there are LDPC, HCH, Hamming, RS Coding, etc., and through this, an improved signal can be obtained. . Signal processing other than this may also be used as a process for obtaining an improved signal when it is determined that the reception characteristics are not good. Next, in operation S140, the determined signal processing is performed on the first video signal. Here, the operation S140 of performing the determined signal processing may include displaying information on at least one of the analyzed reception characteristics and the determined signal processing. In addition, in operation S140 for performing the determined signal processing, a signal for the first video signal is displayed while displaying a second video based on a second video signal of a first channel or another channel among a plurality of channels received from the second tuner. And performing an operation. Finally, in operation S150, the first image is displayed on the display unit based on the processed first image signal.

4 is a flowchart illustrating a method of controlling a display device according to an embodiment of the present invention. 4 is a flowchart similar to the configuration of the operation described in FIG. 3, but shows a more specific embodiment.

First, in operation S110, the first tuner receives a first image signal of a first channel among a plurality of channels, and in operation S125, among the signal strength, bit error rate, signal-to-noise ratio, and carrier-to-noise ratio of the received first image signal Decide at least one. Next, in operation S135, a corresponding signal processing is determined based on at least one of the determined signal strength, bit error rate, signal-to-noise ratio, and carrier-to-noise ratio. At this time, the signal processing is to remove interference from the first video signal, forward error correction (FEC), ATV / DTV AGC Speed change, equalizer slope change, pilot size change, symbol rate It may include processing for at least one of a detection range change, a phase tracking loop gain, and a frequency change, and is not limited to this embodiment. Next, in operation S140, the determined signal processing is performed on the first image signal, and in operation S150, the first image is displayed on the display unit based on the processed first image signal.

5 is a flowchart illustrating a method of controlling a display device according to an embodiment of the present invention. 5 illustrates a method of controlling a display device according to a user's command when a second tuner is further provided in addition to the first tuner.

First, in operation S115, the first video signal of the first channel among the plurality of channels is received by the first tuner, and the second video signal of the first channel or the other channel of the plurality of channels is received by the second tuner. Next, in operation S170, a user command is received. At this time, as illustrated in FIG. 9, the user's command may be made when the user selects the automatic signal processing 163 menu from the TV screen menu 161 while watching the TV. Next, in operation S120, the reception characteristic is analyzed for the received first video signal, and in operation S137, a corresponding signal processing is determined based on the received user's command. Next, in operation S145, while displaying the second image based on the second image signal, the determined signal processing is performed on the first image signal, and in operation S150, the first image is processed based on the processed first image signal. It is displayed on the display.

6 is a flowchart illustrating a method of controlling a display device according to an embodiment of the present invention. 6 illustrates a method of controlling a display device according to a user's command when only the first tuner is provided.

First, in operation S110, a first video signal of a first channel among a plurality of channels is received by the first tuner. Next, the user's command is received in operation S170, and the reception characteristics of the first video signal received in S120 are analyzed. Next, in S137, the corresponding signal processing is determined based on the received user's command, and in S140, the determined signal processing is performed on the first video signal. Finally, in S150, the first image is displayed on the display unit based on the processed first image signal.

As described above, the present invention has been described in detail through preferred embodiments, but the present invention is not limited thereto, and may be variously implemented within the scope of the claims.

100: display device
110: first tuner
120: second tuner
130: signal processing unit
140: image processing unit
150: control unit
160: display unit
170: command receiving unit
200: user input unit

Claims (12)

In the control method of the display device,
Receiving a first video signal of a first channel among a plurality of channels in a first tuner;
Analyzing a reception characteristic including at least one of signal strength, bit error rate, signal-to-noise ratio, and carrier-to-noise ratio for the received first image signal;
Elimination of interference, Forward Error Correction (FEC), ATV / DTV AGC Speed change, Equalizer slope change, Pilot size change, Symbol rate detection range change, Phase Tracking Loop gain gain), and determining a signal processing corresponding to the analyzed reception characteristic among a plurality of signal processing including a frequency change;
Performing the determined signal processing on the first video signal;
And displaying the first image on the display unit based on the processed first image signal. delete According to claim 1,
The step of performing the signal processing,
A display comprising the step of performing signal processing on the first image signal while displaying a second image based on the second image signal of the first channel or another channel among the plurality of channels received from the second tuner. How to control the device. According to claim 1,
The step of performing the determined signal processing,
And displaying information on at least one of the analyzed reception characteristics and the determined signal processing. According to claim 1,
Receiving a user command;
The determining of the signal processing includes determining the corresponding signal processing based on the received user's command. delete In the display device,
A first tuner capable of receiving a video signal of any one of a plurality of channels;
A signal processor;
A display unit that displays an image based on the image signal;
Control the first tuner to receive the first video signal of the first channel among the plurality of channels, and include at least one of signal strength, bit error rate, signal-to-noise ratio, and carrier-to-noise ratio for the received first image signal Analyzing the reception characteristics to be performed, eliminating interference, changing forward error correction (FEC), changing ATV / DTV AGC Speed, changing equalizer slope, changing pilot size, changing symbol rate detection range, phase The signal processing corresponding to the analyzed reception characteristic is determined among a plurality of signal processing including a phase tracking loop gain and a frequency change, so that the determined signal processing is performed on the first video signal. A display device including a control unit that controls a signal processing unit and controls the display unit to display a first image based on the processed first image signal. delete The method of claim 7,
Further comprising a second tuner for receiving the second video signal of the first channel or the other of the plurality of channels,
The control unit controls the signal processing unit to perform signal processing on the first image signal while displaying the second image based on the received second image signal, and the first image is based on the processed first image signal. Display device for controlling the display unit to display. The method of claim 7,
The control unit displays information on at least one of the analyzed reception characteristics and the determined signal processing on the display unit. The method of claim 7,
Further comprising a command receiving unit for receiving a user's command,
The control unit determines the corresponding signal processing based on the received user's command. delete

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