KR20070040102A - Apparatus for receiving a broadcast signal and method for displaying a window on a screen - Google Patents

Abstract

The present invention relates to a broadcast receiving apparatus and a screen presentation method. According to an aspect of the present invention, there is provided a broadcast receiving apparatus for receiving a broadcast signal and displaying the same on a screen, the broadcast receiving apparatus comprising: a signal decoder to decode an image of the received broadcast signal on a screen; An image output unit which displays an image output by the signal decoder on a screen; And a screen display unit capable of displaying a splash window screen on the video output unit when power is supplied to the broadcast receiving device or when a broadcast channel is switched. do. According to the present invention, the mute screen does not appear on the screen when the broadcasting receiver is turned on or when the broadcasting channel is switched, so that the mute screen is misunderstood during the time when the user misunderstands whether the broadcasting receiver is powered or responds to the screen. It can get rid of the frustration you need to watch.

Mute, OSD, Splash, Channel Switching

Description

Apparatus for receiving a broadcast signal and method for displaying a window on a screen}

1 is a block diagram showing an embodiment of a DMB receiving apparatus

2 is a block diagram illustrating a process of decoding an MPEG 2 transport stream of a DMB signal during channel switching;

3 is a block diagram showing an embodiment of a screen display unit of the broadcast receiving apparatus according to the present invention

4 is a flowchart illustrating an embodiment of a broadcast presentation method according to the present invention.

5 (a) and 5 (b) are views showing the result of expressing the splash window according to an embodiment of the present invention.

<Description of Signs of Major Parts of Drawings>

100: tuner 200: baseband portion

210: A / D section 220: transmission signal synchronization section

230: transmission signal demodulator 240: deinterleaver

250: Viterbi decoder 260: audio decoder

300: DMB processor unit 310: DMB receiver

320: synchronization detection unit 330: TS deinterleaver

340: RS decoding unit 400: multimedia unit

410: MPEG2TS synchronization unit 420: DMB decoding unit

421 system decoding unit 425 H.264 decoding unit

426: OD decoding unit 428: BSAC decoding unit

500: screen output unit 510: first layer

520: second layer 600: image output unit

The present invention relates to a broadcast receiving apparatus and a screen displaying method, and more particularly, to a broadcast receiving apparatus and a screen displaying method which can make a mute screen invisible when the broadcast receiving apparatus is turned on or when a broadcasting channel is switched. It is about.

Digital broadcasting offers a higher quality CD quality than conventional AM and FM radios, and digital broadcasting enables various data services. Digital multimedia broadcasting (DMB) is now becoming a next generation broadcasting service by providing two-way communication and excellent mobile reception quality.

The DMB standard includes information for transmitting MPEG-4 (Moving Picture Experts Group 4; MPEG-4) data to the data broadcasting standard within the digital audio broadcasting (DAB) standard. Therefore, in addition to MPEG-4 data, the DMB standard enables other types of data transmission and supports multimedia broadcasting that can be received. This can lead to many applications, such as complex products and portable receivers that combine the functions of cellular phones and DMB broadcast receivers.

However, such a broadcast receiver requires a lot of time in processing the digitized data, so the initial booting time is long when the power is turned on, and a black screen (hereinafter, referred to as a user) during normal channel switching is displayed. There is a problem of generating a mute screen. As a result, a user may feel uncomfortable in use, such as being able to re-manipulate a keypad or the like, by misunderstanding that the broadcasting receiver is not turned on or channel switching is not normally performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a broadcast receiving device and a method of displaying a screen so that a mute screen does not occur on the screen when the broadcast receiving device is turned on or when a broadcast channel is switched. To provide.

In order to achieve the above object, the present invention provides a broadcast receiving apparatus for receiving and displaying a broadcast signal on a screen, comprising: a signal decoder for decoding an image of the received broadcast signal to be output on a screen; An image output unit which displays an image output by the signal decoder on a screen; And a screen display unit capable of displaying a splash window screen on the image output unit when power is applied to the broadcast receiving apparatus or when a broadcast channel is switched.

The screen display unit may be an on screen display (OSD) unit for adjusting a screen display by providing a user interface on a screen.

The screen display unit includes a first layer for adjusting a screen display by providing a user interface on the screen; And a second layer capable of displaying a splash window screen on the image output unit when power is supplied to the broadcast receiving apparatus or when a broadcast channel is switched.

The screen display unit outputs a splash window to the image output unit until the image of the receiving channel is displayed on the screen by applying power to the broadcast receiving apparatus, or when the broadcasting channel is switched, an image of the switched channel is output. It is preferable to display the splash window to the image output unit until

As another aspect of the invention, the present invention comprises the steps of applying power to a broadcast receiving apparatus for receiving and expressing a broadcast; Displaying a splash window on a screen of the broadcast receiving device; And turning off a splash window screen when the reception channel is displayed on the screen.

In addition, the present invention comprises the steps of displaying the image of the selected channel of the received broadcast signal on the screen; Switching a channel to a channel different from the displayed channel; Displaying a splash window on the screen; And turning off the splash window screen when an image of the switched channel is displayed.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

1 is a block diagram showing an embodiment of a DMB receiver as a broadcast receiver. A process of decoding and outputting a broadcast signal received by the DMB receiving apparatus will be briefly described with reference to FIG. 1. The DMB receiving apparatus includes a tuner unit 100, a baseband unit 200, a DMB processor unit 300, a multimedia unit 400, a screen display unit 500, and an image output unit 600.

The tuner 100 selects a desired DMB broadcast signal from a transmission signal of a radio frequency (RF) band. The baseband unit 200 converts the received signal into a baseband, and the analog / digital unit 210 samples the signal into a digital signal. The transmission signal synchronizer 220 synchronizes the sampled signal, and the transmission signal demodulator 230 demodulates the synchronized signal according to a modulation scheme. Deinterleaver 240 handles the error of the synchronized signal. The viterbi decoder 250 minimizes and outputs an error included in the signal, and the audio decoder 260 decodes and outputs a digital audio broadcasting (DAB) audio signal.

The DMB processor unit 300 extracts a signal according to the DMB transmission standard with respect to the signal output from the baseband unit 200. To this end, the DMB receiver 310 receives a DMB transport stream (TS), detects synchronization of the stream in the synchronization detector 320, and de-interleaves the transport stream in the TS deinterleaver 330. To relocate the stream. The RS (Reed-Solomon) decoding unit 340 corrects an error included in the stream and outputs a transport stream TS in the form of Moving Picture Experts Group 2 (MPEG 2).

The MPEG2TS synchronizer 410 of the multimedia unit 400 receives the MPEG 2 transport stream output from the DMB processor 300 and performs synchronization of each header in the stream. The video signal is output as an image from the image output unit 600 via the H.264 decoder 425 and the object description (OD) decoder 426, and the DMB audio signal is BSAC (Bit Sliced Arithmetic Coding) decoding. It is output as an audible signal via the unit 428.

2 illustrates a process of decoding an MPEG 2 transport stream of a DMB signal by the multimedia unit 400 of the DMB receiving apparatus during channel switching.

The multimedia unit 400 parses data of a program associate table (PAT), a program map table (PMT), and an object description (OD) section from an MPEG 2 transport stream received each time a channel is converted. Packet ID according to a video / audio elementary stream identifier (ES_ID). Through the above process, when the specific information is parsed from the video / audio signal of the current channel and the system decoder 421 of the multimedia unit 400 is initialized, the H.246 decoder 425 is thereafter. In the BSAC decoder 428, decoding of the video / audio signal is started.

According to the DMB specification, PAT information having a PID for a PMT section is every 500 ms (millisecond), PMT information having an PID (initial object description) information and PID information for each ES_ID is 500 ms, and a video ES_ID and an audio ES__ID and Since the OD information having the video decoder information and the audio decoder information is transmitted every 500 ms, it may take up to 1.5 seconds or more to know all of the above information, which is a major influence on the response time of the DMB broadcast selected by the DMB receiver. It becomes a factor. In addition, in order to display an image on the screen of the DMB receiver during channel conversion, it takes about 5 seconds to acquire the FIC (Fast Information Channel) and PSI (Program Specific Information) data. It takes

When power is supplied to the DMB receiver and initially booted, the DMB receiver initializes a clock and initializes a storage device, for example, synchronous dynamic random access memory (SDRAM). After going through a process such as setting up an external memory interfacing (EMIF), the system starts to boot by copying an operating system (OS) stored in a read only memory (ROM), which is a nonvolatile storage device, to a read access memory (RAM). do. The initial boot time required by the DMB receiver is up to four seconds. Due to the time taken during the channel switching or initial booting, the user may be mistaken that the system of the DMB receiver is down or powered off.

3 shows an embodiment of the screen display unit 500 of the broadcast receiving apparatus according to the present invention. The broadcast receiving apparatus according to the present invention may generate a splash window in the screen display unit 500 during the mute screen is generated during channel switching or initial booting. The screen display unit 500 may be an OSD (on screen display) unit having a user interface on the screen. In addition, the screen display unit 500 has a first layer 510 functioning to control a screen by a user interface like a conventional OSD unit and a second window displaying a splash window during a mute screen generation. It may have a multilayer structure of a layer 520.

4 is a flowchart illustrating an embodiment of a broadcast presentation method according to the present invention. An embodiment of a broadcast presentation method according to the present invention will be described as an example when implemented through a broadcast receiving apparatus including a screen display having a multi-layer structure. It is assumed that the first layer of the screen display unit serves as a user interface, and the second layer displays a splash window when a mute screen occurs on the screen.

When power is initially applied to the broadcast receiving apparatus, the second window of the screen display unit may first display a splash window on the screen (S10).

During the initial booting time, the second layer of the screen display unit reads one of the screens of the splash window stored in the broadcast receiving apparatus and outputs it to the screen (S20). In addition, the process of outputting the splash window is continued until the broadcast receiving apparatus receives and executes a task according to a user's command, that is, preparation of the user interface is completed (S30).

When the mute screen does not occur on the screen and the user can perform a work command by the user, the first layer of the screen display unit operates and the second layer of the screen display unit is disabled (S40).

If there is a channel change by the user watching the screen (S50), the second layer of the screen display unit, which is disabled (disabled), operates to display the splash window screen on the screen (S60).

After decoding of the converted channel is completed, it is determined whether a mute picture on the screen no longer occurs (S70), and when it is no longer generated, the second layer of the screen display unit is disabled. Without operation (S80), the screen of the switched channel is displayed.

5 (a) and 5 (b) show examples of splash windows that are displayed on a screen while a mute screen is generated when power is applied to a broadcast receiving apparatus or a channel is converted according to the present invention. FIG. 5A illustrates an example of a splash window that may appear when the first layer of the screen display unit does not operate and only the second layer operates.

FIG. 5B illustrates an example of a splash window in which an example in which the first layer and the second layer of the screen display unit operate. Therefore, the image not shown in FIG. 5A in FIG. 5B is an image by the first layer of the screen display unit.

The effects of the broadcast receiving apparatus and the screen presentation method according to the present invention described above are as follows.

According to the broadcast receiving apparatus and the screen displaying method according to the present invention, when the power of the broadcast receiving apparatus is turned on or when the broadcasting channel is switched, the mute screen does not occur on the screen so as to misunderstand whether the user is the power of the broadcast receiving apparatus or to display the screen. It can eliminate the frustration of watching the mute screen during the time to respond to.

Claims (6)

In a broadcast receiving device for receiving a broadcast signal and displaying on a screen, A signal decoder which decodes the received image of the broadcast signal on a screen; An image output unit which displays an image output by the signal decoder on a screen; And And a screen display unit capable of displaying a splash window screen on the video output unit when power is supplied to the broadcast receiver or when a broadcast channel is switched. The method of claim 1, And the screen display unit is an OSD (on screen display) unit for adjusting a screen display by providing a user interface on a screen. The method of claim 1, The screen display unit includes a first layer for adjusting a screen display by providing a user interface on the screen; And And a second layer capable of displaying a splash window screen on the image output unit when the power is applied to the broadcast receiving apparatus or when the broadcasting channel is switched. The method of claim 1, The screen display unit outputs a splash window to the image output unit until the image of the receiving channel is displayed on the screen by applying power to the broadcast receiving apparatus, or when the broadcasting channel is switched, an image of the switched channel is output. And outputting a splash window to the video output unit until a splash window is displayed. Applying power to a broadcast receiving apparatus that receives and expresses a broadcast; Displaying a splash window on a screen of the broadcast receiving device; And And turning off a splash window screen when the reception channel is displayed on the screen. Displaying an image of a selected channel among received broadcast signals on a screen; Switching a channel to a channel different from the displayed channel; Displaying a splash window on the screen; And Turning off the splash window screen when an image of the switched channel is displayed.

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