KR101661973B1 - Image Display Apparatus - Google Patents

Abstract

The present invention relates to an image display apparatus. The image display apparatus according to the present invention includes a remote control device interface unit, a control unit, a video / audio processing unit, and a display unit. The video / audio processing unit generates an OSD signal and outputs a video signal And an OSD generating unit / sub-picture processing unit. Thus, by using the scaler of the OSD generation unit when implementing a channel browser or PIP, a separate sub scaler and video Mux for implementing a channel browser or PIP can be omitted.

Description

Technical Field [0001] The present invention relates to a video display device,

The present invention relates to an image display apparatus, and more particularly, to an image display apparatus that utilizes a scaler of an OSD generating unit when implementing a channel browser or a PIP.

A video display device is a device having a function of displaying an image that a user can view. Also, the video display device can display a broadcast selected by the user among the broadcast signals transmitted from the broadcasting station on the display. Currently, the trend is shifting from analog broadcasting to digital broadcasting worldwide.

Such digital broadcasting transmits digital video and audio signals and provides a clear screen with high data resolution and low error rate compared to analog broadcasting, advantageous for error correction, and high resolution. In addition, with the implementation of digital broadcasting, bidirectional services have become possible.

In addition to the tendency to switch to digital broadcasting, there is an increasing tendency to broadcast in response to various demands of users.

On the other hand, the menu desired by the user in the video display device is also increasing, and the number of chips used in entering the menu may increase.

The present invention provides an image display apparatus capable of omitting a separate sub-scaler and a video Mux when implementing a channel browser or a PIP.

According to an aspect of the present invention, there is provided an image display apparatus including a remote control device interface unit, a control unit, a video / audio processing unit, and a display unit. The video / audio processing unit generates an OSD signal, And an OSD generating unit / sub-picture processing unit for processing a video signal inputted for implementation.

In addition, the OSD generator / sub-picture processor includes a graphic scaler that adjusts an OSD signal and a channel browser or an item output for PIP implementation to fit the display unit.

According to the present invention, by using the scaler of the OSD generation unit when implementing a channel browser or PIP, a separate sub scaler and video Mux for implementing a channel browser or PIP can be omitted.

1 is a view illustrating a video display device system according to an embodiment of the present invention.
2 is an internal block diagram of an image display apparatus according to an embodiment of the present invention.
3 is an internal block diagram of a video / audio processing unit of a video display device according to an embodiment of the present invention.
4 is a flowchart illustrating an operation of the OSD generator / sub-picture processor of FIG.

1 is a view illustrating a video display device system according to an embodiment of the present invention.

The video display device 100 according to an embodiment of the present invention can communicate with the broadcasting station 210, the external communication device 220, or the external device 230. [

The image display apparatus 100 may receive a broadcasting signal including a video signal transmitted from the broadcasting station 210. The image display apparatus 100 processes image signals and audio signals or data signals included in the broadcast signal in a manner suitable for output from the image display apparatus 100 and outputs images or sounds.

The image display apparatus 100 can communicate with the external communication device 220. The external communication device 220 is a device capable of transmitting and receiving signals to and from the image display device 100 via an arbitrary network. For example, the external communication device 220 may be a telephone that can be connected to the video display device 100 through a wired or wireless base station. Also, the external communication device 220 may be a network server capable of providing contents to the video display device 100 through the Internet network. The content provider can provide the content to the video display device 100 using the network server.

The video display device 100 can also communicate with the external device 230. [ The external device 230 is a device capable of transmitting / receiving signals directly to / from the image display device 100 by wire or wirelessly. For example, the external device 230 may be a media storage or playback device used by a user. That is, the external device 230 may be a camera, a DVD or Blu-ray player, a personal computer, or the like.

The broadcasting station 210, the external communication device 220, and the external device 230 may transmit a signal including a video signal to the video display device 100. The image display apparatus 100 can display an image based on a video signal included in an input signal. The video display apparatus 100 may transmit a signal transmitted from the broadcasting station 210 and the external communication apparatus 220 to the video display apparatus 100 to the external apparatus 230. In addition, a signal transmitted from the external device 230 to the video display device 100 may be transmitted to the broadcasting station 210 or the external communication device 220. That is, the video display apparatus 100 can transmit contents included in the signals transmitted from the broadcasting station 210, the external communication apparatus 220, and the external apparatus 230, in addition to directly reproducing the video contents from the video display apparatus 100.

2 is an internal block diagram of an image display apparatus according to an embodiment of the present invention.

2, an image display apparatus 100 according to an exemplary embodiment of the present invention includes a broadcast signal receiving unit 110, a network interface unit 120, an external device input / output unit 130, a remote control device interface unit 140 A control unit 150, a video / audio processing unit 170, a display unit 180, and an audio output unit 185.

The broadcast signal receiving unit 110 may receive an RF broadcast signal corresponding to a channel selected by the user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through the antenna. The broadcast signal receiving unit 110 may convert the received RF broadcast signal into an intermediate frequency signal, a baseband image, or a voice signal, and output the converted signal to the video / audio processing unit 170.

In addition, the broadcast signal receiver 110 may receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme. The broadcast signal receiving unit 110 sequentially selects RF broadcast signals of all broadcast channels stored through the channel memory function among the received RF broadcast signals, and converts the RF broadcast signals into an intermediate frequency signal, a baseband image, or a voice signal.

The network interface unit 120 provides an interface for connecting the video display device 100 to a wired / wireless network including the Internet network.

The network interface unit 120 may include a wireless communication unit capable of wirelessly connecting the video display device 100 to the Internet. For wireless Internet access, WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access)

The network interface unit 120 may receive content or data provided by a content provider or a network operator through a network. That is, it is possible to receive contents such as broadcasts, games, VOD, broadcasting signals, and the related information provided from a contents provider through a network. In addition, the update information and the update file of the firmware provided by the network operator can be received.

The external device input / output unit 130 can connect the external device and the video display device 100. [ To this end, the external device input / output unit 130 may include an A / V input / output unit or a wireless communication unit.

The external device input / output unit 130 is connected to an external device such as a DVD (Digital Versatile Disk), a Blu ray, a game device, a camera, a camcorder, a computer (notebook) The external device input / output unit 130 transmits external video, audio, or data signals to the video / audio processing unit 170 of the video display device 100 through the connected external device. Also, the video / audio processing unit 170 can output the processed video, audio, or data signals to the connected external device.

The A / V input / output unit includes an Ethernet terminal, a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, and an S-Video (Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an RGB terminal, a D-SUB terminal, and the like.

Further, the wireless communication unit can perform wireless communication with other electronic devices. The video display device 100 is connected to other electronic devices in accordance with communication standards such as Bluetooth, Radio Frequency Identification (RFID), IrDA (Infrared Data Association), UWB (Ultra Wideband), ZigBee, Can be connected.

The remote control device interface unit 140 may include a wireless communication unit capable of wirelessly transmitting / receiving signals to / from the remote control device 200. The remote control device interface unit 140 can wirelessly transmit and receive signals to and from the remote control device 200 through the RF module. Also, the remote control device 200 can receive a signal transmitted through the IR module according to the IR communication standard.

The remote control device transmission signal input to the image display device 100 through the remote control device interface unit 140 is output to the control unit 150 of the image display device 100. [ The control unit 150 can determine the information on the key operation or the like of the remote control device from the signal transmitted from the remote control device 200 and control the video display device 100 in accordance with the information.

The control unit 150 controls the overall operation of the image display apparatus 100. The control unit 150 can receive a signal transmitted from the remote control device through the remote control device interface unit 140 and receive the command through the local key included in the image display device 100. [ The controller 150 determines a command included in the received signal or a command corresponding to a local key operation, and controls the image display apparatus 100 to correspond to the command.

For example, when the user inputs a predetermined channel selection command, the control unit 150 controls the broadcast signal receiving unit 110 to receive the broadcast signal provided from the selected channel through the broadcast signal receiving unit 110.

In addition, the video / audio processing unit 170 is controlled so that the video signal and the audio signal of the selected channel are processed. That is, when the user selects the channel browser or the PIP mode, the control unit controls the sub-screen to display the items output for the channel browser or PIP implementation described below.

In addition, the control unit 170 controls the video / audio processing unit 170 so that channel information selected by the user can be output through the display unit 180 or the audio output unit 185 together with the video signal and the audio signal.

As another example, the user can input another kind of video or audio output command through the remote control device. That is, the user may desire to watch a camera or camcorder image signal inputted through the external device input / output unit 130 instead of the broadcast signal. In this case, the control unit 150 controls the video / audio processing unit 170 to output the video or audio signal input through the USB input unit of the external device input / output unit 130 or the like through the display unit 180 or the audio output unit 185 Can be controlled.

The video / audio processing unit 170 receives a video signal or a voice signal included in a signal received through the broadcast signal receiving unit 110, the network interface unit 120, and the external device input / output unit 130, And is processed to be suitable for the output unit 185. The video / audio processing unit 170 may process the video signal or the audio signal based on the information included in the data signal received together with the video signal or the audio signal.

The video / audio processing unit 170 can select a video signal or a voice signal to be processed in response to a user command input through the control unit 150. The video signal or audio signal processed by the video / audio processing unit 170 is a video or audio signal output through the display unit 180 or the audio output unit 185. The command inputted through the control unit 150 may include a broadcast channel selection command, a content selection command to be played back among the contents input to the video display apparatus 100, and a channel browser or a picture-in-picture (PIP) Can be processed.

According to the present invention, when a channel browser or a PIP is implemented by a user's choice, a function of a scaler for implementing a channel browser or a PIP can be performed in the OSD generation unit, and a separate sub scaler And video Mux can be omitted. This will be described later with reference to FIG. 3 and FIG.

The display unit 180 displays a video signal, a data signal, an OSD signal processed by the video / audio processing unit 170, a video signal and a data signal received through the external device input / output unit 130 as R, G, B Signal to generate a driving signal. The display unit 180 may be a PDP, an LCD, an OLED, or a flexible display.

Meanwhile, the display unit 180 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 185 receives a signal processed by the video / audio processing unit 170, for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs it as a voice. The sound output unit 185 may be implemented by various types of speakers.

3 is an internal block diagram of the video / audio processing unit 170 of the video display device according to the embodiment of the present invention.

The video / audio processing unit 170 may include a demodulator 171, a demultiplexer 172, a decoder 173, a graphic mixer 175, and an OSD generator / sub-picture processor 179 .

The demodulator 171 may demodulate the broadcast signal received by the broadcast signal receiver 110. For example, the demodulator 171 may receive the digital IF signal DIF converted by the broadcast signal receiver 110 and perform a demodulation operation. The demodulator 171 may perform channel decoding. For this, the demodulator 171 may include a convolution decoder, a deinterleaver, and a reed-solomon decoder to perform convolutional decoding, deinterleaving, and reed solomon decoding.

The demodulator 171 can demodulate and decode the channel and output the stream signal TS. The stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed. For example, the stream signal may be an MPEG-2 TS (Transport Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The stream signal output from the demodulator 171 may be input to the demultiplexer 172.

The demultiplexer 172 demultiplexes the received stream signal, for example, the MPEG-2 TS into a video signal, a voice signal, and a data signal. The stream signal input to the demultiplexer 172 may be a stream signal output from the demodulator 171, the network interface unit 120, and the external device input / output unit 130.

The demultiplexed data signal may be an encoded data signal. The encoded data signal may include EPG (Electronic Program Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on each channel. For example, the EPG information may be ATSC-PSIP (ATSC-Program and System Information Protocol) information in the case of the ATSC scheme and DVB-Service Information (DVB-SI) information in case of the DVB scheme .

The decoder unit 173 can decode the demultiplexed signal. The decoder unit 173 of the present embodiment includes a video decoder 173a for decoding the demultiplexed video signal and a scaler 173b for adjusting the resolution of the decoded video signal to be output from the video display device 100 .

The OSD generator / sub-picture processor 179 generates an OSD signal and can process a sub-picture image signal input for a channel browser or PIP implementation.

First, the OSD generator / sub-picture processor 179 can generate an OSD (On Screen Display) signal. Specifically, various information is displayed on the screen of the display unit 180 in a graphic or text based on at least one of a video signal and a data signal, or a user input signal inputted through a remote control device or another type of control command input means Lt; / RTI >

The generated OSD signal may be output to the graphic mixer 175 after being controlled by a graphic scaler that adjusts the resolution to be output from the image display apparatus 100.

On the other hand, the OSD signal may include information on a user interface screen, various menu screens, widgets, icons, and the like that the display unit 180 can display as a signal generated for graphic or text display.

When the user selects the channel browser or the PIP mode, the OSD generator / sub-picture processor 179 transmits the demultiplexed signals through the demultiplexer 172 or the external device input / output unit 130 It is possible to output a video signal constituting an item or a thumbnail corresponding to an image to be generated based on the video signal among the input signals.

At this time, the OSD generator / sub-picture processor 179 can adjust the item or the thumbnail image signal output for the channel browser or PIP to fit the display unit 180 using the graphics scaler for adjusting the OSD signal .

Accordingly, a channel browser screen or a PIP screen including items or thumbnails corresponding to images generated based on the video signal input to the image display device 100 may be displayed on the display 180, and a channel browser or a PIP You can omit separate sub scalers and video muxes for implementation.

The demultiplexed video signal through the demultiplexer 172 and the OSD signal generated by the OSD generator / sub picture processor 179 or the item or thumbnail video signal output for the channel browser or the PIP are input to the graphics mixer 175, And mixed. Subsequently, the display unit 180 displays an image based on the mixed video signal.

4 is a flowchart illustrating an operation of the OSD generator / sub-picture processor of FIG.

Referring to FIG. 4, the OSD generator / sub-picture processing unit demultiplexes the OSD data, which is a user input signal, input through at least one of a video signal and a data signal or a remote control device or another kind of control command input means, A sub picture (channel browser or PIP) data, which is a video signal of a multiplexed signal or a signal input through an external device input / output unit, is input.

Meanwhile, if the user selects a channel browser or a PIP mode through a remote controller or a local key provided in the image display device, the sub picture data is adjusted by the graphic scaler of the OSD generator / sub picture processor, .

If the user does not select the channel browser or the PIP mode, the OSD signal generated by the OSD generator / sub-picture processor is adjusted by the graphic scaler and input to the graphic mixer.

Therefore, according to the present invention, it is possible to omit a sub-scaler and a video Mux for implementing a channel browser or a PIP.

100: Video display device
170: Video / audio processing unit
171:
172: Demultiplexer
173:
175: Graphic Mixer
179: OSD generating section / Sub-picture processing section

Claims (7)

A remote control device interface unit, a control unit, a video / audio processing unit, and a display unit,
The video / audio processing unit includes a demodulator for outputting a stream signal, a demultiplexer for demultiplexing the stream signal, a video decoder for decoding the demultiplexed signal, and a decoder for adjusting the resolution of the decoded video signal An OSD generator / sub-picture processor for generating an OSD signal and processing an input video signal for a channel browser or a PIP implementation, and an OSD generator / sub-picture processor for processing the OSD signal and the OSD signal, And a graphics mixer for mixing the channel browser or the items output for PIP implementation,
The OSD generator / sub-picture processor includes a graphics scaler that adjusts the OSD signal and the items output for the channel browser or PIP implementation to fit the display unit,
When an input for selecting a channel browser or a PIP mode is received through the remote control device interface unit, sub picture data is input to the graphic mixer controlled by a graphics scaler of the OSD generator / sub picture processor,
If an input for selecting a channel browser or a PIP mode is not received through the remote controller interface unit, the OSD signal generated by the OSD generator / sub-picture processor is adjusted by the graphic scaler of the OSD generator / sub-picture processor Wherein the input signal is input to the graphic mixer. delete The method according to claim 1,
Wherein the control unit controls the output of the channel browser or the PIP implementation to be displayed on the display as a sub-screen. The method according to claim 1,
And a broadcast signal receiver for receiving a broadcast signal of a selected channel or a broadcast signal of a previously stored channel, wherein the input video signal is a broadcast signal received through the broadcast signal receiver, . delete delete delete

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