KR100536701B1 - Device for editing character on the optical disk recording and playback system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character editing apparatus of an optical disc recording and reproducing apparatus, and in particular, a character information storage unit storing character information of subpicture data to be recorded on an optical disc, and a subpicture in which character information of the character information storage unit is selected or created. A subpicture encoder for encoding data, and a recording unit for recording data of the subpicture encoder on an optical disc. Therefore, the present invention can easily and variously insert and edit characters of an optical disc by generating or editing characters of subpicture data in the optical disc recording and reproducing apparatus and recording them on the optical disc.

Description

Character Editing Device for Optical Disc Recording and Playback Device {DEVICE FOR EDITING CHARACTER ON THE OPTICAL DISK RECORDING AND PLAYBACK SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording and reproducing an optical disc such as a DVD (Digital Video Disk), and more particularly, to a character editing apparatus for an optical disc recording and reproducing apparatus capable of adding or editing characters of a sub picture. .

In general, an optical disc recording and reproducing apparatus such as a DVD-RW capable of rewriting an optical disc is an apparatus capable of creating and editing various titles in comparison with floppy disks, audio cartridge tapes, and video cartridge tapes.

An optical disc such as a DVD reads out video and audio data recorded as a main title, decodes it, and processes the signal, and then outputs high quality video and high quality audio through a connected device such as a general television. Subtitle data of various countries may be additionally recorded as sub picture data on the DVD. Sub picture data may be reproduced in association with video and audio data corresponding to a main title. Is recorded randomly in some sections of the DVD. As a result, a playback apparatus such as a DVD not only plays back video and audio data recorded as a main title on the DVD, but also plays back subpicture data recorded as a subtitle in a part of the DVD. Here, the sub picture data may be, for example, a character for supplementing or explaining the main title content, or another foreign language subtitle character.

However, such an optical disc recording and reproducing apparatus such as a DVD requires research and development to edit various titles efficiently by using the characteristics of the disc. To this end, in DVD-RW, a technology for producing and storing subpicture data used as a subtitle has been researched and developed.

An object of the present invention is to add or edit the characters of the subpicture to record on the optical disk in order to solve the problems of the prior art as described above, the character of the optical disk recording and reproducing apparatus can easily and variously insert and edit the characters of the optical disk To provide an editing device.

In order to achieve the above object, the present invention provides an optical disc recording and reproducing apparatus, comprising: a character information storage unit storing character information of subpicture data to be recorded on an optical disc, and a subpicture in which character information of the character information storage unit is selected or created; A subpicture encoder for encoding data, and a recording unit for recording data of the subpicture encoder on an optical disc.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing an optical disk recording apparatus such as a DVD having a character editing apparatus according to the present invention. Referring to FIG. 1, the optical disc recording apparatus according to the present invention includes a key input unit 10, a control unit 12, a character information storage unit 14, a video / audio input unit 16, a video encoder 18, Audio encoder 20, subpicture encoder 22, video / audio buffer 24, subpicture buffer 26, MPEG stream encoder 28, stream buffer 30, recording unit 32 and Optical disk 34 or the like.

The key input unit 10 is a portion in which an operation key signal is input through a key switch or an operation key signal from a remote controller is received. The control unit 12 controls the internal device of the optical disc recording apparatus according to the key signal input to the key input unit 10.

The character information storage unit 14 is a table in which character information of subpicture data is stored, and the character type, character color, size, font, and the like are stored.

The video / audio input unit 16 receives an analog video / audio signal and converts it to digital or receives digital video / audio data as it is.

The video and audio encoders 18 and 20 encode the video and audio signals of the video / audio input unit 16 according to the control signals of the controller 12 and store them in the video / audio buffer 24 for a while. At this time, the video encoder 28 encodes the data according to the MPEG video format, and the audio encoder 20 encodes the data according to the AC-3 or MPEG audio data standard.

The sub picture encoder 22 encodes the created or edited sub picture data by selecting the character information of the character storage unit 14 according to the key signal input from the key input unit 10, and then temporarily converts the sub picture data into the sub picture buffer 26. Save it.

The MPEG stream encoder 28 encodes encoded video, audio data and subpicture data into one stream data according to a control signal of the controller 12 and temporarily stores the encoded video, audio data and sub picture data in the stream buffer 30.

The recording unit 32 generates power by amplifying the stream data of the MPEG stream encoder 28, and irradiates the optical disk 34 with laser light provided in the optical pickup circuit (not shown).

The character editing apparatus of the optical disc recording apparatus of the present invention configured as described above operates as follows.

When the character creation key signal of the DVD optical disc is input through the key input unit 10, the control unit 12 displays character information such as character type, character color, size, and font stored in the character information storage unit 14 (OSD). Display and output to an image output device such as a television (TV) connected to the device.

When the selected character type, color, size, font, etc. are input through the key input unit 10, the control unit 12 uses the sub picture encoder 22 to display the character information of the character storage unit 14 by the key input value of the character information. Select to create and encode new subpicture data. The encoded sub picture data is temporarily stored in the sub picture buffer 26.

The subpicture data of the subpicture encoder 22 or the buffer 26 is encoded into the stream data together with the data of the video / audio encoders 18 and 20 via the MPEG stream encoder 28 and the optical disc via the recording unit 32. Is recorded at 34.

2 is a block diagram showing an optical disc reproducing apparatus such as a DVD according to the present invention. 2, the optical disk reproducing apparatus to which the present invention is applied includes a motor driver 36, an optical pickup unit 38, a signal processor 40, an MPEG stream decoder 42, a video decoder 44, and a sub. And a picture decoder 46, an audio decoder 48, a synthesizer 50, a video / audio output unit 52, and the like. Here, the key input unit 10, the control unit 12, the video / audio buffer 24, the sub picture buffer 26, the stream buffer 30, and the optical disc 34 are overlapped with the recording apparatus of FIG. The description will be omitted.

The motor driver 36 controls the drive of the spindle motor for rotating the optical disc 34. The optical pickup unit 38 picks up a signal recorded on the optical disc 34 and sends it to the signal processing unit 40. The signal processor 40 sends the signal picked up by the optical pickup unit 38 to the MPEG stream decoder 42 through amplification and digital signal processing.

The MPEG stream decoder 42 decodes one stream data in a decoding method corresponding to the encoding method of the stream encoder according to the control signal of the controller 12 and temporarily stores it in the stream buffer 30.

The video and audio decoders 44 and 48 decode the video and audio signals from the stream data of the MPEG stream decoder 42 according to the control signals of the controller 12, and temporarily store them in the video / audio buffer 24.

The subpicture decoder 46 decodes the subpicture data from the stream data of the MPEG stream decoder 42 according to a control signal of the controller 12 and stores the subpicture data in the subpicture buffer 26.

The synthesizer 50 synthesizes the data of the video decoder 44 and the subpicture decoder 46 and delivers the data to the video / audio output unit 52 as one video data.

The video / audio output unit 52 converts the video data of the synthesizer 50 and the audio data of the audio decoder 48 into analog signals or outputs the digital signals to video output devices such as televisions as they are.

1 and 2, the character editing apparatus of the optical disc reproducing apparatus of the present invention configured as described above operates as follows.

When the character editing key signal of the DVD optical disc is input through the key input unit 10, the controller 12 controls the optical pickup unit 38, the signal processing unit 40, the MPEG stream decoder 42, and the subpicture decoder 46. The sub picture data recorded on the optical disc 34 is decoded through the video / audio output unit 52 and output to a video output device such as a television.

Accordingly, when any one sub picture data is selected from among the sub picture data displayed on the image output apparatus through the key input unit 10, the controller 12 outputs the sub picture data to the image output apparatus and the character information storage unit 14. Character information such as character type, character color, size, and font stored in the OSD is generated and output to the image output apparatus.

When the selected character type, color, size, font, etc. are input through the key input unit 10, the control unit 12 selects the character information of the character storage unit 14 based on the key input value of the character information, and then the sub picture encoder 22. After editing the subpicture data, the encoder is encoded. The encoded sub picture data is temporarily stored in the sub picture buffer 26.

The sub picture data of the sub picture encoder 22 or the buffer 26 is encoded into the stream data through the MPEG stream encoder 28 and rewritten on the optical disc 34 through the recording unit 32.

3A and 3B are diagrams illustrating an example of inserting data of a newly created or edited subpicture into a VOB.

An optical disc such as a DVD includes a lead-in area, a lead-out area, and a data recording area. The data recording area includes a logical format area indicating a relationship between a physical address and a logical address, and a video data recording area in which a video manager recording area and video data, audio data, and the like are recorded. Here, in the video data recording area, data is recorded into a plurality of files divided into a plurality of sets, and each set is layered into a set unit, a cell unit, a unit unit, a pack unit, and the like. Accordingly, a plurality of video title sets (VTSs) that can be recorded in the highest recording unit each include a video object set (VBO), and each video object set includes one or more video objects identified by IDs. (VOB) is included. Each video object VOB includes one or more cells and each cell includes one or more video object units VOBU.

The video object unit VOBU includes an audio pack (A_PCK) 102 composed of audio data, a video pack (V_PCK) 104 of video data, and a sub picture pack (SP_PCK) 106 of character data. In this case, the video object unit VOBU further includes a header NV_PCK 100 of unit ID data.

As shown in Fig. 3A, newly created sub picture data according to the present invention is newly stored in a sub picture pack (SP_PCK) 106 area inserted with a margin when recording an optical disc. Alternatively, as shown in Fig. 3B, the newly created sub picture data is inserted in place of any video pack (V_PCK) 104a area recorded on the optical disc. Alternatively, the edited sub picture data is stored in the original recording area of the optical disc.

4 is a diagram illustrating a character generation or edit screen displayed on a TV according to the present invention. Referring to FIG. 4, a screen for generating or editing characters is displayed on a TV screen, a window 202 displaying character data, a window 204 displaying character key data, a character type, font, color, and the like. Selection key buttons 206, 208, 210, direction key buttons 212, key buttons 214, 216, 218, such as start / modify / complete, etc., for selecting.

While watching the character generation or editing screen displayed on such a TV screen, character key data is input to a key input unit to generate or edit characters of sub picture data on an optical disc and record them.

As described above, the present invention has an effect of easily and variously inserting and editing characters of an optical disc by adding or editing characters of sub-picture data in the optical disc recording and reproducing apparatus and recording them on the optical disc.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

1 is a block diagram showing an optical disc recording apparatus such as a DVD having a character editing apparatus according to the present invention;

2 is a block diagram showing an optical disc reproducing apparatus such as a DVD to which the present invention is applied;

3A and 3B are diagrams illustrating an example of inserting data of a newly created or edited subpicture into a VOB;

4 is a view showing a character generation or editing screen displayed on a TV according to the present invention;

<Description of the code | symbol about the principal part of drawing>

10: key input unit 12: control unit

14: character information storage unit 16: video / audio input unit

18: Video Encoder 20: Audio Encoder

22: Subpicture Encoder 24: Video / Audio Buffer

26: subpicture buffer 28: MPEG stream encoder

30: stream buffer 32: recording unit

34: disc

Claims (3)

In the optical disc recording and reproducing apparatus, A character information storage unit for storing character information of subpicture data to be recorded on the optical disc; A sub picture encoder for encoding the created or edited sub picture data by selecting the character information of the character information storage unit; A recording unit for recording the data of the subpicture encoder on an optical disc Character editing apparatus of the optical disc recording and playback device comprising a. The method of claim 1, And the sub picture encoder reproduces the sub picture data recorded on the optical disc, edits and encodes the reproduced sub picture data with the character information selected by the character information storage unit, and encodes the reproduced sub picture data. . The method of claim 1, And the character information includes a character type, a character color, a size, and a font.