KR100884664B1 - Apparatus and method for displaying subtitle in digital broadcasting receiver - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subtitle display apparatus and method in a digital broadcast receiver. For example, in various types of digital broadcast receivers such as a digital television or a set top box, video and audio received through digital broadcast, and a sub Decoding and signal processing of the title data, respectively, but when the improved subtitle display mode is set according to the user's request, the output state of the left channel audio or the right channel audio is detected, and the caption character superimposed on the main video is displayed. By displaying the subtitle on a part of the left side of the display area to be suitable for the left channel audio or on the part of the right side of the display area to suit the right channel audio, the user hears the stereo audio while watching the broadcast. Of course, you can feel the three-dimensional sense, of course, Watching the display area of the title to be displayed in the variable, such as the left or right, it is extremely useful to be able to visually inventors feel a stereoscopic effect.

Digital broadcast receiver, left channel audio, right channel audio, subtitle, display area

Description

Apparatus and method for displaying subtitle in digital broadcasting receiver

1 illustrates a configuration of a subtitle display apparatus in a digital broadcast receiver according to the present invention.

2 is a flowchart illustrating a subtitle display method in a digital broadcast receiver according to the present invention;

3 and 4 illustrate embodiments in which subtitles are selectively displayed on a part of a right side and a part of a left side of the display area according to the present invention.

FIG. 5 illustrates a configuration of another embodiment of a subtitle display device in a digital broadcast receiver according to the present invention.

6 illustrates an embodiment in which audio channel information is detected from audio header information according to the present invention.

7 illustrates an operation flowchart of another embodiment of a subtitle display method in a digital broadcast receiver according to the present invention.

※ Explanation of code for main part of drawing

10: video processing unit 11: subtitle processing unit

12: audio processing unit 13: synthesis unit

14: OSD generator 15: delay unit

16: left and right detection unit 17: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subtitle display apparatus and method in a digital broadcast receiver. For example, in a digital broadcast receiver of various types such as a digital television or a set top box (STB), a main video is provided. The present invention relates to a subtitle display device and a method of superimposing and displaying subtitle characters on (Main Video).

In general, a digital broadcast receiver such as a digital television (D-TV) or a set-top box (STB) receives broadcast data of an MPEG2 transport stream transmitted through, for example, digital broadcast, thereby receiving a video. ), Audio, and subtitle data.

In addition, the separated video, audio, and subtitle data are respectively decoded and signal processed. The video data is decoded by a video decoder to be displayed as a main video, and the subtitle data is displayed. For example, the signal is decoded into text data by a subtile decoder, and then signal-processed into a subtitle image of a subtitle character by an OSD generator to generate a part of the main video. Overlaid on the area.

The audio data is decoded by an audio decoder and output as high quality audio. For example, in case of stereo audio, the left channel (L_CH) audio and the right channel (R_CH) are output. Since the audio is separated from each other and output through different speakers, the user can listen to the stereo audio while watching the subtitle of the subtitle characters superimposed on the main video.

However, in the general digital broadcasting receiver as described above, even if only audio of one channel of left channel audio or right channel audio is continuously output for a predetermined time or more, for example, the subtitle of the subtitle character superimposed on the main video is displayed. Since the title is continuously displayed at a fixed position in the display area (for example, the center position at the bottom of the screen), the user can only sense the stereoscopic sound by listening to the stereo audio, but also the subtitle image of the subtitle character. There is a problem that you can not visually feel the three-dimensional effect at all.

Compared with the auditory stereoscopic effect by stereo audio, there is a problem that the visual stereoscopic effect by the subtitle of the subtitle character is lowered.

Accordingly, the present invention has been created to solve the above problems, for example, while processing the video, audio, and subtitle data received through digital broadcasting, respectively, the output of left channel audio or right channel audio A subtitle display apparatus and method in a digital broadcasting receiver for displaying a subtitle of a subtitle character superimposed on a main video on a part of a left or a part of a display area according to a state thereof, There is a purpose.

In accordance with another aspect of the present invention, there is provided a method of displaying a subtitle in a digital broadcasting receiver, the method comprising: signal processing video, audio, and subtitle data received through digital broadcasting; Detecting and comparing a left channel audio and a right channel audio among the audio signals processed; And three steps of separately displaying subtitles to be superimposed on the video on the left part or the right part of the display area according to the comparison result.

In addition, the subtitle display apparatus in the digital broadcast receiver according to the present invention includes video processing means for processing video, audio, and subtitle data received through digital broadcasting, audio processing means, subtitle processing means, and Detecting means for detecting and comparing a left channel audio and a right channel audio among audio processed by the audio processing means; And control means for operationally controlling the OSD generating means in order to separately display the subtitles to be superimposed on the video on the left part or the right part of the display area according to the comparison result. ,

In addition, the subtitle display method in the digital broadcast receiver according to the present invention comprises the steps of signal processing video, audio, and subtitle data received through digital broadcasting, respectively; Detecting audio channel information from header information of the audio data processed by the signal; And displaying, according to the detected audio channel information, subtitles to be superimposed on the video on a part of a left side or a part of a right side of the display area.

In addition, the subtitle display apparatus in the digital broadcast receiver according to the present invention includes video processing means for processing video, audio, and subtitle data received through digital broadcasting, audio processing means, subtitle processing means, and Detecting means for detecting audio channel information from header information of audio data signal-processed by the audio processing means, and overlaying the video according to the detected audio channel information. And controlling means for operationally controlling the OSD generating means in order to distinguish and display the subtitle to be displayed on a part of the left side or the part of the right side of the display area.

Hereinafter, exemplary embodiments of a subtitle display apparatus and method in a digital broadcast receiver according to the present invention will be described in detail with reference to the accompanying drawings.

1 shows a configuration of a subtitle display device in a digital broadcast receiver according to the present invention. For example, a digital broadcast receiver such as a digital television or a set-top box includes a video processor 10 and a subtitle processor. (11), audio processing unit 12, synthesizing unit 13, OSD generating unit 14, delay unit 15, left / right detection unit 16, control unit 17, and the like.

On the other hand, the video processor 10, for example, as shown in Figure 1, a video decoder for decoding the video data separated from the broadcast data of the MPEG2 transport stream received through digital broadcast signal processing to the main video A video decoder may be used, and the audio processor 12 decodes stereo audio data separated from the broadcast data and processes the audio signal into left channel audio and right channel audio. Can be used.

The subtitle processor 11 may use a subtitle decoder that decodes the subtitle data separated from the broadcast data and outputs the subtitle data as text data. The text data may be generated by the OSD. The unit 14 converts and generates the subtitle image of the subtitle character Text, and then displays the super video with the main video.

The left / right detection unit 16 detects and compares the signal levels of the left channel audio L_Audio and the right channel audio R_Audio which are signal-processed by the audio processor 12, respectively. In operation 17), if the level of the left channel audio is larger than a level of the right channel audio by more than a predetermined reference value, the OSD generator 14 controls the subtitle character to be superimposed on the main video. The subtitle of is displayed on the left part of the display area.

On the other hand, if the level of the right channel audio is greater than a predetermined reference value than the level of the left channel audio, the controller 17 operates and controls the OSD generator 14 to control the main video. The subtitle of the subtitle character to be superimposed on is displayed on the right part of the display area.

On the other hand, in the OSD generation unit 14, the subtitle of the subtitle character is divided and displayed on any one part of the left part, the right part, and the center part of the display area according to the operation control of the controller 17. In order to do this, each area is set in advance in advance.

The delay unit 15 detects and compares the left channel audio and the right channel audio as described above, and separately displays the subtitles of the subtitle characters on a part of the left side or the right of the display area. During the predetermined time, the output time of the left channel audio and the right channel audio is delayed, which will be described in detail below.

FIG. 2 is a flowchart illustrating a method of displaying a subtitle in a digital broadcast receiver according to the present invention. For example, as described above with reference to FIG. 1, in the OSD generator 14, The area in which the subtitle of the subtitle character is superimposed on the main video is divided into a left part, a right part, a center part, and the like of the display area to be stored in settings (S10).

On the other hand, in the controller 17, when an arbitrary specific key is input by the user, for example, when an advanced subtitle display key is input, the controller 17 enters the corresponding improved subtitle display mode. In step S11, the left / right detection unit 16 detects signal levels of left channel audio L_Audio and right channel audio R_Audio, which are decoded and signal-processed by the audio processor 12, respectively. The comparison is made (S12).

In addition, when the level of the right channel audio (R_Audio) is much greater than the level of the left channel audio (L_Audio) (S13), for example, the control unit 17 further exceeds a predetermined reference value. If large, the subtitle display area corresponding to the right channel audio is selected and determined (S14).

On the other hand, as a result of the comparison, when the level of the left channel audio (L_Audio) is much larger than the level of the right channel audio (R_Audio) (S15), for example, greater than a predetermined reference value set in advance, the left channel audio The corresponding subtitle display area is selected and determined (S16). If the level difference between the level of the left channel audio L_Audio and the right channel audio R_Audio does not exceed the predetermined reference value, the left / right channel is selected. The subtitle display area corresponding to all of the audio, for example, the center area, is selected and determined (S17).

In response to the determination, the controller 17 controls the OSD generation unit 14 so that the subtitle of the subtitle character to be superimposed and displayed on the main video is part of the left side, the right side, or the center of the display area. The part is marked separately (S18).

For example, as shown in FIG. 3, a subtitle of a subtitle character superimposed on the main video is displayed in a part of the lower right of the display area so as to conform to the right channel audio (for example, TV reference), or FIG. As shown in Fig. 4, the left part of the lower portion of the display area is displayed to be suitable for the left channel audio.

On the other hand, when the controller 17 releases the improved subtitle display mode as described above, for example, by a user's key input (S19), the OSD generator 14 is operated and controlled in advance. Subtitles of the subtitle characters are superimposed and displayed in the subtitle display area (for example, the center area) set as the default (S20).

Accordingly, while listening to stereo audio while watching a broadcast, the user may not only sense an audible stereoscopic feeling but also visually feel a three dimensional effect while watching the display area of the subtitle variably displayed to the left or the right. do.

FIG. 5 illustrates a configuration of another embodiment of a subtitle display device in a digital broadcast receiver according to the present invention. As described above with reference to FIG. 1, for example, a digital television such as a digital television or a set-top box. The broadcast receiver includes a video processor 10, a subtitle processor 11, an audio processor 12, a synthesizer 13, an OSD generator 14, a delayer 15, a left / right detector 26. And a controller 17 and the like.

On the other hand, the left and right detection unit 26, as shown in Fig. 6, decoding and signal processing by the audio processing unit 12 of the broadcast data of the MPEG2 transport stream (TS) transmitted through digital broadcasting In the header information of the audio data stream, audio channel information indicating left channel audio or right channel audio is detected.

When the left channel audio information is continuously detected by a predetermined reference value or more by the left / right detection unit 26, the control unit 17 operates to control the OSD generation unit 14 to provide a main video. The subtitles of the subtitle characters to be superimposed are displayed on the left part of the display area.

On the other hand, if the right channel audio information is continuously detected by the left / right detection unit 26 more than a predetermined reference value, the OSD generator 14 is operated to control the subtitle of the subtitle character to be superimposed on the main video. The title is displayed on the right part of the display area, which will be described in detail below.

FIG. 7 illustrates an operation flowchart of another embodiment of a subtitle display method in a digital broadcast receiver according to the present invention. For example, as described above with reference to FIG. In step S30, the area where the subtitle of the subtitle character is superimposed on the main video is divided into a left part, a right part, a center part, and the like of the display area, and the setting is stored (S30).

On the other hand, in the controller 17, when an arbitrary specific key is input by the user, for example, when an advanced subtitle display key is input, the controller 17 enters the corresponding improved subtitle display mode. In step S31, the left / right detection unit 26 detects audio channel information in the header information of the audio data stream decoded and signal-processed by the audio processing unit 12 ( S32).

The control unit 17 selects and determines the subtitle display area corresponding to the right channel audio when the right channel audio (R_Audio) information is continuously detected over a predetermined reference value (S33). It is made (S34).

On the other hand, if the left channel audio (L_Audio) information is continuously detected over a predetermined reference value (S35), the subtitle display area corresponding to the left channel audio is selected and determined (S36). When the left channel audio (L_Audio) information or the right channel audio (R_Audio) information is alternately detected, the subtitle display area corresponding to both the left and right channel audio, for example, the center area, is selected and determined. S37).

In response to the determination, the controller 17 controls the OSD generation unit 14 so that the subtitle of the subtitle character to be superimposed and displayed on the main video is part of the left side, the right side, or the center of the display area. The part is marked separately (S38).

For example, as described above with reference to FIGS. 3 and 4, subtitles of subtitle characters superimposed and displayed in the main video are placed on the right part of the bottom of the display area so as to be suitable for right channel audio (for example, TV reference). To the left side of the bottom of the display area, or to be suitable for left channel audio.

On the other hand, the controller 17, when canceling the improved subtitle display mode as described above by a user's key input (S39), controls the OSD generation unit 14 and defaults in advance. The subtitle of the caption character is superimposed on the subtitle display area (for example, the center area) set to (Default) (S40).

Accordingly, while listening to stereo audio while watching a broadcast, the user may not only sense an audible stereoscopic feeling but also visually feel a three dimensional effect while watching the display area of the subtitle variably displayed to the left or the right. do.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The subtitle display apparatus and method in the digital broadcast receiver according to the present invention constructed and configured as described above may be used in various types of digital broadcast receivers, such as digital television or set-top boxes, and the like. Decode and signal the audio and subtitle data, respectively, and when the improved subtitle display mode is set according to a user's request, the output state of the left channel audio or the right channel audio is detected and displayed in the main video. By displaying a subtitle of a subtitle character to be displayed on a part of the left side of the display area to be suitable for the left channel audio or on a part of the right side of the display area to be suitable for the right channel audio, the user can display stereo audio during broadcasting. While listening, sense the three-dimensional sense acoustically Doemeun able, of course, that while the display area of subtitles to be displayed in the variable, such as the left or right, it is extremely useful to be able to visually inventors feel a stereoscopic effect.

Claims (16)

delete delete delete delete delete delete delete delete Signal processing of video, audio, and subtitle data received through digital broadcasting, respectively; Detecting audio channel information indicating left channel audio or right channel audio in header information of the audio data processed by the signal; And As a result of the detection, when the left channel audio is continuous for a predetermined reference value, the subtitle to be superimposed on the video is displayed on a part of the left side of the display area. And displaying the subtitles to be superimposed on the right part of the display area. delete The method of claim 9, Pre-dividing each corresponding area in advance in order to distinguish and display the subtitle to be superimposed on the video in any one of a left part, a right part, and a center part of the display area; And a subtitle display method in a digital broadcast receiver. The method of claim 9, An output time point of the left channel audio and the right channel audio for a predetermined time required for detecting the audio channel information and separately displaying a subtitle to be superimposed on the video on a part of a left side or a part of a right side of a display area. The subtitle display method of the digital broadcast receiver, characterized by further comprising the step of delaying. It includes video processing means for processing video, audio, and subtitle data received through digital broadcasting, audio processing means, subtitle processing means, and OSD generating means, Detecting means for detecting audio channel information for indicating left channel audio or right channel audio in header information of audio data signal-processed by said audio processing means; and As a result of the detection, when the left channel audio is continuous for a predetermined reference value, the subtitle to be superimposed on the video is displayed on a part of the left side of the display area. And control means for operationally controlling the OSD generating means to display the subtitles to be superimposed on the right part of the display area. delete The method of claim 13, The OSD generating means presets each region corresponding thereto in advance in order to separately display the subtitles to be superimposed on the video in any one of the left part, the right part, and the center part of the display area. A subtitle display apparatus in a digital broadcast receiver. The method of claim 13, An output time point of the left channel audio and the right channel audio for a predetermined time required for detecting the audio channel information and separately displaying a subtitle to be superimposed on the video on a part of a left side or a part of a right side of a display area. Subtitle display device in a digital broadcast receiver, characterized in that it further comprises a delay means for delaying.

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