KR20070081583A - Apparatus and method for processing music information in digital tv - Google Patents

Abstract

An apparatus and a method for processing music information in a digital TV system are provided to display music information such as lyrics on a screen when a user watches a music broadcasting program. Broadcasting stream data is received and divided into a video signal and an audio signal(S11). The video signal is split into a user data region and video data(S13). Music broadcasting information data included in caption data of the user data region is stored. The music broadcasting information data is decoded and output in the form of caption data(S14).

Description

Apparatus and method for processing music information in digital TV}

1 is a block diagram showing a signal processing system of a digital TV of the prior art.

2 is a diagram illustrating syntax of user data according to an exemplary embodiment of the present invention.

3 is a diagram illustrating a process of processing music broadcasting information according to an embodiment of the present invention.

4 is a block diagram showing an apparatus for processing music broadcasting information according to an embodiment of the present invention.

5 is a flow chart showing a music broadcast information processing method according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

31.Demultiplexer 32 ... MPEG decoder

33 Memory unit 34 Caption decoder unit

35 ... OSD processing unit 36 ... Display unit

37.Audio output

The present invention relates to caption data reception, and more particularly, to an apparatus and method for processing music broadcasting information in a digital TV so that music broadcasting information corresponding to the caption data can be displayed as a caption.

With the recent development of the broadcasting environment, dozens or hundreds of broadcast channels exist, and accordingly, the amount of broadcast programs or services has increased exponentially.

In addition, it provides not only video and audio services of broadcast channels but also broadcast schedules and information on broadcast programs, and audio dedicated channels for high quality audio services are provided.

In the case of a signal received through the audio dedicated channel, only an audio stream exists so that only a single screen such as a still image is displayed by the display means.

Hereinafter, an audio dedicated channel of a digital TV of the prior art will be described.

1 is a block diagram showing a signal processing system of a digital TV of the prior art.

Recently developed TV (TV) systems provide data that users can use in addition to video signals and audio signals that are generally provided.

The provided data mainly includes information necessary for a program guide provided on a TV system, and a user may use the data using an application such as a program guide.

Here, the program guide shows schedules and respective information according to time for channels and programs.

In addition, it receives the signal transmitted from the TV and outputs through a multi-step process, the configuration for this is as follows.

Referring to FIG. 1, in a digital TV system, video, audio, and data signals transmitted in the form of MPEG 2 are received through the tuner 11, and the received signals are received by the decoder 13 from the CPU through the input device 12. Under the control of (14), the video decoding is divided into video, audio, and data through channel decoding, de-multiplexing, video / audio / data decoding, and the video and audio signals are respectively displayed on the display unit 15. Is output through the output device of the audio output unit 16.

Data used in an application such as a Program Guide in the digital TV is stored in a data storage unit (17).

In addition, in the case of a general analog TV, data is transmitted through VBI (Vertical Blanking Interval) and stored in the data storage unit 17.

The data stored in the data storage unit 17 is displayed through the output device along with the path of ② when the application is executed, such as a video signal.

In addition, as the broadcasting environment changed from analog to digital broadcasting, ATSC (Advanced Television System Committee) standard was established as the terrestrial broadcasting standard in the United States, and for this purpose, digital closed caption (DTVCC), which is reinforced than the conventional analog closed caption, was established. Standards (EIA 708) have been established and used.

However, among the TV channels undergoing the signal processing as described above, there are audio-only channels mainly for music broadcasting, and in the case of the audio-only channels, only a single screen is displayed and only an audio service such as music is output. There is a problem that does not satisfy the needs of the user who wants to know information about the music.

Disclosure of Invention The present invention has been made to solve the above problems, and an object thereof is to provide an apparatus and method for processing music broadcasting information in a digital TV which can display music broadcasting information while following a predetermined standard of music broadcasting.

Music broadcasting information processing method in the digital TV according to the present invention for achieving the above object,

Receiving broadcast stream data into video / audio signals, and separating the separated video signal into a user data area and video data;

Storing music broadcasting information data included in a caption data area of the user data area;

And decoding the music broadcast information data in the form of caption data.

In the present invention, when the still image of the broadcast stream data and the music broadcast is output, if a request for output of the music broadcast information data is input,

The method may further include reading and decoding the corresponding data from the stored music broadcasting information data and outputting the data on the screen in the form of a caption.

In the present invention, if the music broadcast information data is included, the icon information for identifying them is displayed on the screen.

In the present invention, the stored music broadcasting information data is music information including at least one or more of the lyrics information corresponding to the music output from the current channel or the description related to the music.

In the present invention, the music broadcast information data is characterized in that the caption data conforming to the A-53B standard of the ATSC standard.

In addition, the apparatus for processing music broadcasting information in a digital TV according to the present invention for achieving the above object,

A demultiplexer which receives a broadcast stream and divides the video / audio signal into a video / audio signal, and divides the separated video signal into a user data area and video data;

A decoder unit for decoding the separated video / audio data so as to output still images and music;

A memory unit for storing music broadcasting information data included in the user data area;

A caption decoder to process the music broadcasting information data to generate caption data;

When the music is output, it characterized in that it comprises an OSD processing unit for processing to display the caption data on the screen.

In the present invention, the OSD processing unit is characterized in that the processing so that the icon information to identify whether the inclusion of the music broadcast information data is displayed on the screen.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a diagram illustrating syntax of user data according to an exemplary embodiment of the present invention.

2 shows user data syntax processed to transmit music broadcasting information according to the A-53B standard, which is an ATSC standard according to the present invention.

In the case of a digital closed caption (DTVCC), the caption data itself is transmitted using a user data area included in a header of a picture constituting the video data area, and is in compliance with the MPEG-2 video standard and the ATSC standard. It is stated.

Therefore, in the present invention, the music broadcast information is processed so that the music broadcast information data is included in the caption data area in the user data area so as to conform to the ATSC standard A-53B and is described as follows.

user_data_type_code: Since it is expressed in 8 bits and the caption is already designated as '0x03', it is possible to know that the music broadcasting information is included by determining the number that can be represented by the remaining 8 bits except the '0x03' (21). ).

reserved: The process_em_data_flag, process_cc_data_flag, and additional_data_flag fields transmitted in the caption are inserted into the reserved area because they are unnecessary when transmitting music broadcast information (22).

The remaining parts 23 to 28 correspond to the data format transmitted from the caption, and only the field name is added with the name audio to distinguish the music broadcasting information from the caption data.

In addition, the genre, lyrics, composer, and music description of the output music may be added using the cc_audio_type 26, cc_audio_data1 27, and cc_audio_data2 28 portions.

For example, when a classical music broadcast is output, the composer and a musical description of the classic may be displayed on the screen of the TV.

In addition, it is also possible to change and transmit additional functions such as color or font of lyrics displayed through the portion.

3 is a diagram illustrating a process of processing music broadcasting information according to an embodiment of the present invention.

As shown in FIG. 3 (a), the transmitter processes and processes music broadcast information such as lyrics and composer in accordance with the transmission data standard described with reference to FIG. 2 through a caption encoder.

As shown in FIG. 3 (b), the caption decoder of the receiver receives data including music broadcast information, decodes the data, and processes the data to be displayed on the screen as an on screen display (OSD) in the same form as a caption.

4 is a block diagram showing an apparatus for processing music broadcasting information according to an embodiment of the present invention.

Referring to FIG. 4, a MPEG-2 type broadcast stream is received under the control of a CPU and separated into a video / audio signal, and the separated video signal is divided into a user data area User_data () and MPEG-. A demultiplexer 31 for separating the video data into two types; An MPEG decoder (32) for decoding the video / audio data; A memory unit 33 for storing music broadcasting information included in the user data area; A caption decoder 34 for processing the music broadcast information data to generate caption data; An OSD processor (35) for processing the caption data to be displayed on a screen; A display unit 36 for displaying the OSD processed data on a screen; And an audio output unit 37 for outputting the decoded audio signal.

5 is a flowchart illustrating a music broadcast information processing method according to an embodiment of the present invention.

4 and 5, when a channel is selected by the viewer, the broadcast stream data according to the selected channel, that is, the music professional broadcast is received (S11).

When the received broadcast stream data is separated into a video / audio signal by the demultiplexer 31 and includes music broadcast information (S12), the user data area (User_data ()) as shown in FIG. MPEG-2 video data is separated and output (S13).

In this case, the music broadcast information data included in the caption data area in the user data area is stored in the memory unit 33, and the video / audio data is output to the MPEG decoder unit 32.

In addition, the OSD processing unit 35 processes and displays an icon indicating that the music broadcasting information is included and outputs the same to the display unit 36.

In this case, the user may check the icon on the screen to determine whether music broadcasting information is included, and the icon may be displayed in at least one of a character and a picture.

At this time, when the user wants to know the information of the music output to the audio output unit 37 and presses the music broadcast information confirmation button by a command input means such as a remote controller, the music unit 33 stores the music broadcast information data existing on the current channel. ) And the caption decoder 34 outputs the caption decoder 34 to decode the caption data and output the caption data to the OSD processing unit 35.

The OSD processor 35 processes the generated caption data to be displayed on the screen and outputs the caption data to the display unit 36, and the caption data of the music broadcast information corresponding to the music output to the audio output unit 37. Is processed to be displayed on the display unit 36.

Therefore, the user can check the information of the music output from the current channel through the screen.

That is, the broadcast stream data is parsed, and the music broadcast information data included in the caption data area in the user data area is separated to generate caption data and displayed on the screen simultaneously with the audio output (S14).

If the music broadcast information is not included, a single screen is displayed as in the conventional art and only audio is output (S15).

In addition, the display menu of the music broadcast information may be selected so that the music broadcast information is automatically displayed on the screen in the form of caption data without user selection if the music broadcast information is included.

As described above, the present invention includes the music broadcast information data transmitted according to the A-53B standard, which is the ATSC standard, and the received TV processes the music broadcast information data in the form of an icon to be displayed on the screen. So that the user can check it.

In this case, when an information request is input through a remote controller or the like, information corresponding to the currently output music broadcast is processed to be displayed in the form of caption data and displayed on the screen.

In addition, since it transmits and receives music broadcasting information to meet the ATSC standard A-53B, it can be applied to the existing ATSC standard without major modification.

So far, the present invention has been described with reference to the embodiments, and those skilled in the art to which the present invention pertains may implement embodiments of the present invention in a different form from the detailed description of the present invention within the essential technical scope of the present invention. Could be. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

According to the apparatus and method for processing music broadcast information in a digital TV according to the present invention, when viewing a music professional broadcast or the like, it is possible to display music information such as lyrics corresponding to music on a screen.

In addition, there is an effect that allows the user to check whether the music broadcast information is included or not to display on the screen.

In addition, by applying the AT-SC standard A-53B standard can be applied to the existing ATSC standard without major modifications.

Claims (7)

Receiving broadcast stream data into video / audio signals, and separating the separated video signal into a user data area and video data; Storing music broadcasting information data included in a caption data area of the user data area; And decoding the music broadcast information data and outputting it in the form of caption data. The method of claim 1, When a still image of the broadcast stream data and a music broadcast are output, when a request for outputting music broadcast information data is input, And reading out and decoding the corresponding data from the stored music broadcasting information data, and outputting the data on the screen in a caption form. The method of claim 1, The music broadcast information processing method of the digital TV, characterized in that the icon information is displayed on the screen to identify if the music broadcast information data is included. The method of claim 1, And the stored music broadcasting information data is music information including at least one of lyrics information corresponding to music output from a current channel or a description related to the music. The method of claim 1, The music broadcasting information data is caption data conforming to the A-53B standard of the ATSC standard standard. A demultiplexer which receives a broadcast stream and divides the video / audio signal into a video / audio signal, and divides the separated video signal into a user data area and video data; A decoder unit for decoding the separated video / audio data so as to output still images and music; A memory unit for storing music broadcasting information data included in the user data area; A caption decoder to process the music broadcasting information data to generate caption data; And a OSD processing unit for processing the caption data to be displayed on the screen when the music is output. The method of claim 6, The OSD processing unit is a music broadcasting information processing apparatus for digital TV, characterized in that for processing to display the icon information to identify whether the inclusion of music broadcast information data on the screen.

Images