KR20060066268A - Display apparatus and display method - Google Patents

Abstract

The present invention relates to an image display apparatus and an image display method capable of extracting an audio signal from a received broadcast signal and providing the audio signal in a sign language or subtitle.

An image display device according to the present invention comprises: a tuner for tuning a broadcast signal received through an antenna; A channel decoder for decoding the channel tuned in the tuner; A demux for receiving a broadcast signal of a channel decoded by the channel decoder and separating the video signal, an audio signal, and additional information; A voice signal processor that receives the voice signal separated from the demux and processes the voice signal into an output signal; An image signal processing unit which receives the image signal separated from the demux and processes the image signal into a displayable signal; A speaker for outputting the audio signal and a display unit for outputting the video signal; A sign language generator that extracts sign language information from a sign language DB by analyzing the voice signal and generates a graphic of the sign language information; An OSD generator for generating an OSD of the graphic generated by the sign language generator and displaying the graphic with the video signal; And extracting and transmitting the voice signal to the sign language generating unit and controlling the graphic generated by the sign language generating unit to be generated and displayed by the OSD.

Subtitles, characters, sign language

Description

Image display device and image display method {DISPLAY APPARATUS AND DISPLAY METHOD}

1 is a block diagram showing the configuration of a conventional digital TV.

2 is a view for explaining an embodiment of an image display device according to the present invention;

3 is a view for explaining the configuration of the sign language generation unit in the present invention.

4 is a view for explaining another embodiment of an image display device according to the present invention;

5 is a view for explaining the configuration of the caption generation unit in the present invention.

6 is a view for explaining an image display method according to the present invention;

7 is a view for explaining another embodiment of the image display method according to the present invention;

<Explanation of symbols for main parts of drawing>

101; Tuner 102; Channel decoder

103; Demux 104; Voice signal processor

105; Speaker 106; Image signal processor

107; Display unit 108; Control

109; Storage 111; Control

112; Sign language generating unit 113; OSD generator

117; Subtitle generator 1121; Voice analysis

1122; Search extractor 1123; Sign language DB

1124; Graphic generator 1171; Voice analysis

1172; Search extractor 1173; Character DB

1174; Subtitle generator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video display device and a video display method, and more particularly, to a video display device and a video display method capable of extracting a voice signal from a received broadcast signal and providing the audio signal by sign language or subtitle.

Recently, with the development of the method of transmitting broadcast signals, digital TVs using the digital transmission method have been spreading.

Digital broadcasting of high quality / high quality broadcasted through satellite / terrestrial / cable has several advantages, and it provides high quality, high sound quality and various additional information compared to analog broadcasting.

In digital broadcasting, MPEG-2 is used for video, and AC-3 compression method is used for audio. The compressed information is transmitted to each user through the existing satellite / ground / cable band using QPSK / VSB / QAM transmission method.

This compression technology has made it possible to provide a variety of services. In the case of terrestrial waves, it is possible to broadcast 4 or more channels of SD level in one channel, and HD level can provide 1 channel. In addition, the digital TV transmits additional information along with video / audio in order to provide various services. By using such additional information, a service such as broadcast guide for increasing channel information can be provided.

As mentioned earlier, digital video uses the MPEG-2 method, and it basically supports 18 formats. Digital audio adopts the AC-3 standard, which uses Dolby Digital as the standard. Supporting the Program Service Information Protocol (PSIP) standard, it supports the major, minor channel number, video and audio stream information, and detailed information of the current program.

The digital stream is composed of a video signal, an audio signal, additional information and channel information and is multiplexed in. Therefore, the receiver demultiplexes it according to a predetermined standard to reconstruct the video signal, audio signal, and additional information.

Hereinafter, a configuration of a conventional digital TV will be described with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a conventional digital TV.

As shown in FIG. 1, the digital TV includes a tuner 101 for tuning a broadcast signal received through an antenna according to a user's request, and a channel decoder 102 for decoding a channel tuned by the tuner 101. The demux 103 receives the broadcast signal of the channel decoded by the channel decoder 102 into a video signal, an audio signal, and additional information, and receives a voice signal separated from the demux 103. An audio signal processing unit 104 processing a signal output through 105 and an image signal processing unit receiving a video signal separated by the demux 103 and processing the signal as a displayable signal on the display unit 107. 106, a control unit 108 for outputting a control signal according to a user's request, and a storage unit 109 for storing various information separated from the demux 103 under control of the control unit 108. It consists of.

Referring to the operation of the digital TV configured as described above, the broadcast signal received through the tuner 101 is transmitted in the form of a transport stream video signal, audio signal and additional information, which is a video signal, audio signal and additional information Can be thought of as a set of information in the form of a packetized elementary stream (PES) of 188 bytes each.

The stream-type information transmitted as described above is input to the demux 103 and classified according to the type of the stream. The service information is converted into a database through section filtering and parsing, and the database is a program such as a graphical user interface. To the user. In addition, the video and audio streams are restored by MPEG and output as video and audio information.

As described above, the digital TV provides a user with a character broadcast of additional information separated from the broadcast signal, so that the hearing impaired person can easily grasp the broadcast content.

However, if the text signal is not included in the broadcast signal, the subtitles cannot be displayed, which causes inconvenience to TV viewing for the hearing impaired.

It is an object of the present invention to provide a video display device useful for the hearing impaired by decoding and analyzing a voice signal included in a broadcast signal to be displayed in sign language or subtitles.

In addition, an object of the present invention is to provide a video display device that makes it possible to easily understand the broadcast contents even when it is necessary to mute the volume of the speaker, such as when making a telephone call by displaying the audio signal in subtitles or sign language It is done.

An image display device according to the present invention comprises: a tuner for tuning a broadcast signal received through an antenna; A channel decoder for decoding the channel tuned in the tuner; A demux for receiving a broadcast signal of a channel decoded by the channel decoder and separating the video signal, an audio signal, and additional information; A voice signal processor that receives the voice signal separated from the demux and processes the voice signal into an output signal; An image signal processing unit which receives the image signal separated from the demux and processes the image signal into a displayable signal; A speaker for outputting the audio signal and a display unit for outputting the video signal; A sign language generator that extracts sign language information from a sign language DB by analyzing the voice signal and generates a graphic of the sign language information; An OSD generator for generating an OSD of the graphic generated by the sign language generator and displaying the graphic with the video signal; And extracting and transmitting the voice signal to the sign language generating unit and controlling the graphic generated by the sign language generating unit to be generated and displayed by the OSD.

In addition, the image display device according to the present invention includes a tuner for tuning a broadcast signal received through an antenna; A channel decoder for decoding the channel tuned in the tuner; A demux for receiving a broadcast signal of a channel decoded by the channel decoder and separating the video signal, an audio signal, and additional information; A voice signal processor that receives the voice signal separated from the demux and processes the voice signal into an output signal; An image signal processing unit which receives the image signal separated from the demux and processes the image signal into a displayable signal; A speaker for outputting the audio signal and a display unit for outputting the video signal; A caption generating unit for extracting text information from the caption DB by analyzing the voice signal and generating caption information for the text information; An OSD generator for generating an OSD of the caption generated by the caption generator to be displayed together with the video signal; And extracting and transmitting the audio signal to the caption generating unit and controlling the text generated by the caption generating unit to be generated and displayed by the OSD.

According to an aspect of the present invention, there is provided a video display method comprising: separating an audio signal, an image signal, and additional information from a received broadcast signal, and extracting an audio signal; Analyzing the voice signal to extract sign language information, and generating a graphic of the extracted sign language information; And generating a graphic of the sign language information through an OSD and displaying the graphic with the video signal.

In addition, the video display method according to the present invention comprises the steps of separating the audio signal, video signal, additional information from the received broadcast signal, and extracting the audio signal; Analyzing the voice signal to extract text information, and generating caption information on the extracted text information; The subtitle information may be generated by the OSD and displayed together with the video signal.

Hereinafter, an image display device and an image display method according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a view for explaining an embodiment of an image display apparatus according to the present invention.

2, a video display device according to the present invention includes a tuner 101 for tuning a broadcast signal received through an antenna according to a user's request, and a channel decoder for decoding a channel tuned by the tuner 101. 102, a demux 103 for receiving a broadcast signal of a channel decoded by the channel decoder 102 into a video signal, an audio signal, and additional information, and a demultiplexed audio signal separated from the demux 103. An audio signal processor 104 which receives an input and processes the signal as an outputable signal through the speaker 105 and an image signal which is received from the demux 103 and is processed into a displayable signal on the display unit 107. A signal processor 106, a sign language generator 112 for generating a sign language from the voice signal, and a sign language generated by the sign language generator 112 after temporarily storing a voice signal separated from the demux 103. Temporary storage Memory 110, the control unit 111 for controlling the sign language is generated from the speech signal separated from the demux 103, the OSD (On Screen) for receiving a sign language signal from the control unit 111 to represent the sign language OSD generation unit 113 for generating a display) is included.

Referring to the process of displaying a sign language in the video display device configured as described above, first, the control unit 111 extracts an audio signal from the broadcast signal through the demux 103.

The extracted voice signal is temporarily stored in the memory 110 and sent to the sign language generator 112.

As shown in FIG. 3, the sign language generation unit 112 includes a speech analyzer 1121 for analyzing a voice signal input through the controller 111, and a sign language including sign language information for each voice signal. Search extraction unit for extracting the sign language information for the input voice signal based on the DB (Data Base) 1123 and the speech signal analyzed by the speech analyzer 1121 and the sign language information stored in the sign language DB 1123. 1122 and a graphic generator 1124 for generating a graphic about the sign language information extracted by the search extractor 1122 are included.

In more detail, the speech analyzer 1121 may use various types of speech recognition techniques, and the sign language DB 1123 stores sign language information about a speech signal.

The search extractor 1122 searches and extracts sign language information of the analyzed voice signal from the sign language DB 1123.

The graphic generator 1124 generates the extracted sign language information as a two-dimensional or three-dimensional graphic. The graphic generator 1124 generates a graphic so that a sign language can be displayed by a human face and hand gesture.

The sign language generation unit 112 configured as described above generates a graphic signal by extracting sign language information of an input voice signal.

The graphic about the sign language information is sent to the OSD generator 113, and the OSD generator 113 generates the sign language information through the OSD to be transmitted to the image signal processor 114 to be displayed together with the image signal. .

4 is a view for explaining another embodiment of an image display apparatus according to the present invention.

Referring to FIG. 4, an image display device according to the present invention includes a tuner 101 for tuning a broadcast signal received through an antenna according to a user's request, and a channel decoder for decoding a channel tuned by the tuner 101. 102, a demux 103 for receiving a broadcast signal of a channel decoded by the channel decoder 102 into a video signal, an audio signal, and additional information, and a demultiplexed audio signal separated from the demux 103. An audio signal processor 104 which receives an input and processes the signal as an outputable signal through the speaker 105 and an image signal which is received from the demux 103 and is processed into a displayable signal on the display unit 107. A signal processor 106, a subtitle generator 117 for generating subtitles from the voice signal, a voice signal separated from the demux 103, and a subtitle generated by the subtitle generator 117 Memory (110) And a control unit 111 that controls subtitles to be generated from the voice signal separated by the demux 103, and generates an on-screen display (OSD) for receiving subtitle signals from the control unit 111 to display the subtitles. The OSD generator 113 is configured to be included.

Referring to the process of displaying the subtitles in the video display device configured as described above, first, the control unit 111 extracts the audio signal from the broadcast signal through the demux 103.

The extracted audio signal is temporarily stored in the memory 110 and sent to the subtitle generator 117.

As shown in FIG. 5, the subtitle generator 117 includes a voice analyzer 1171 for analyzing a voice signal input through the controller 111, and a character including text information about each voice signal. A search extracting unit for extracting text information on an input voice signal based on a voice signal analyzed by a DB (Data Base) 1173 and the voice signal analyzed by the voice analyzer 1171 and the text information stored in the text DB 1173. And a caption generating unit 1174 for generating captions for the character information extracted by the search extracting unit 1172.

In more detail, the speech analysis unit 1171 may use various types of speech recognition techniques, and the text DB 1173 stores text information on a speech signal. The search extractor 1172 searches for and extracts text information about the analyzed voice signal from the text DB 1173.

The caption generating unit 117 configured as described above generates caption information by extracting text information on the input voice signal.

The caption information is sent to the OSD generator 113, and the OSD generator 113 generates the caption information into the OSD so that the caption information is transmitted to the video signal processor 114 to be displayed together with the video signal.

6 is a view for explaining an image display method according to the present invention.

First, an audio signal, a video signal, and additional information are separated from the received broadcast signal, and an audio signal is extracted (S100).

Then, the sign language information is extracted by analyzing the voice signal, and a graphic about the extracted sign language information is generated (S110) (S120).

Here, the extracted voice signal may be temporarily stored in the memory, and graphics generated for the sign language information may also be temporarily stored in the memory.

Then, the graphic of the sign language information is generated by the OSD and displayed together with the image signal (S130).

Through the above process, the present invention may convert and display a voice signal of a received broadcast into a sign language signal.

7 is a view for explaining another embodiment of the image display method according to the present invention.

First, a voice signal, a video signal, and additional information are separated from the received broadcast signal, and the voice signal is extracted (S200).

The voice signal is analyzed to extract text information, and subtitle information is generated for the extracted text information (S210) (S220).

Here, the extracted voice signal may be temporarily stored in the memory, and subtitle information may also be temporarily stored in the memory.

The caption information is generated by the OSD and displayed together with the video signal (S130).

Through the above process, the present invention may convert and display a voice signal of a received broadcast into a caption signal.

The video display device according to the present invention may extract a voice signal from a received broadcast signal, analyze the extracted voice signal, and generate a sign language signal or a caption signal and generate the same by using an OSD.

As described above, the present invention converts and provides a voice signal into a sign language signal or a caption signal, and thus has an advantage of helping the hearing impaired to watch a broadcast.

In particular, the present invention can be provided to convert the audio signal into a subtitle signal when the volume of the video display device is to be lowered or the volume is muted, which is a useful function in a situation where a broadcast must be watched without sound.

Claims (8)

A tuner for tuning a broadcast signal received through an antenna; A channel decoder for decoding the channel tuned in the tuner; A demux for receiving a broadcast signal of a channel decoded by the channel decoder and separating the video signal, an audio signal, and additional information; A voice signal processor that receives the voice signal separated from the demux and processes the voice signal into an output signal; An image signal processing unit which receives the image signal separated from the demux and processes the image signal into a displayable signal; A speaker for outputting the audio signal and a display unit for outputting the video signal; A sign language generator that extracts sign language information from a sign language DB by analyzing the voice signal and generates a graphic of the sign language information; An OSD generator for generating an OSD of the graphic generated by the sign language generator and displaying the graphic with the video signal; And a controller for extracting the audio signal and transmitting the extracted audio signal to the sign language generator and controlling the graphic generated by the sign language generator to be generated and displayed by an OSD. The method of claim 1, And a memory for temporarily storing the extracted audio signal or sign language information. The method of claim 1, The sign language generation unit includes a voice analyzer for analyzing a voice signal input through the controller, a sign language DB including sign language information for each voice signal, and a sign language stored in the voice information and sign language DB analyzed through the voice analyzer And a graphic extracting unit for extracting sign language information of a voice signal input based on the information, and a graphic generating unit for generating a graphic about the sign language information extracted by the search extracting unit. A tuner for tuning a broadcast signal received through an antenna; A channel decoder for decoding the channel tuned in the tuner; A demux for receiving a broadcast signal of a channel decoded by the channel decoder and separating the video signal, an audio signal, and additional information; A voice signal processor that receives the voice signal separated from the demux and processes the voice signal into an output signal; An image signal processing unit which receives the image signal separated from the demux and processes the image signal into a displayable signal; A speaker for outputting the audio signal and a display unit for outputting the video signal; A caption generating unit for extracting text information from the caption DB by analyzing the voice signal and generating caption information for the text information; An OSD generator for generating an OSD of the caption generated by the caption generator to be displayed together with the video signal; And a controller for extracting the audio signal and transmitting the extracted audio signal to the caption generating unit and controlling the text generated by the caption generating unit to be generated and displayed by the OSD. The method of claim 4, wherein And a memory for temporarily storing subtitles of the extracted voice signal or text information. The method of claim 4, wherein The caption generating unit includes a voice analysis unit analyzing the voice signal input through the control unit, a text DB including text information of each voice signal, and texts stored in the voice information and text DB analyzed through the voice analysis unit. And a capturing extracting unit for extracting text information on the input voice signal based on the information, and a caption generating unit for generating subtitles for the text information extracted from the search extracting unit. . Separating a voice signal, a video signal, and additional information from the received broadcast signal, and extracting a voice signal; Analyzing the voice signal to extract sign language information, and generating a graphic of the extracted sign language information; And displaying the graphic of the sign language information in OSD and displaying the image with the image signal. Separating a voice signal, a video signal, and additional information from the received broadcast signal, and extracting a voice signal; Analyzing the voice signal to extract text information, and generating caption information on the extracted text information; And displaying the caption information in the OSD and displaying the caption information together with the video signal.

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