KR100466931B1 - Method for reproducing and searching a caption data - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing and searching for caption data. In an optical disc device such as a DVD-Player, a caption data is read out and recorded and stored in a memory provided in the device during a normal playback operation. Then, at the request of the user, only the caption data is reproduced and outputted, or the caption data is recorded and stored in the memory, and the search information for searching the recording position of the recorded video data stream including the caption data is stored. Then, by searching and playing the recording position of the optical disc on which the caption data corresponding to the character input by the user is recorded, it is possible to output and display only the caption data more quickly even when the normal playback operation is stopped. Automatically and quickly the recording position of video data streams in which caption data of characters are recorded It is a very useful invention that can be searched and played back easily.

Description

How to play caption data {Method for reproducing and searching a caption data}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing and searching for caption data, and more particularly, to reproducing and outputting caption data in an optical disc device such as a DVD-Player or the like, or to recording an optical disc using caption data. A caption data reproduction and search method for searching and reproducing a position is provided.

In general, an optical disc device such as a DVD player or the like reads video and audio data recorded on a DVD (Digital Versatile Disc), which is a high-density recording medium, processes a playback signal into a digital video and audio signal, and then connects it with an ordinary television. High-quality video and high-quality sound are output through the device.

On the other hand, the DVD (DVD), the caption data for the hearing impaired, that is, caption data can be additionally recorded, the caption data is being widely used for general users who want to learn the language in addition to the hearing impaired In addition, the caption data is recorded in the video data stream recorded on the DVD.

Accordingly, in the optical disc device such as the DVD player, the caption data is read and decoded when caption data is recorded in the video data stream while reading and playing the video and audio data streams recorded on the DVD. By performing the processing operation, the caption image corresponding to the caption data is displayed along with the video signal of the video data on the screen of a general television.

Therefore, the general user can simultaneously watch the subtitle image together with the high quality video recorded on the DVD, thereby improving the language ability more efficiently.

However, in an optical disc device such as a general DVD player, in order to process the caption data recorded in the video data stream as a caption image as described above, a general playback operation of reproducing the video data stream recorded on the DVD must be performed. Since only the caption data can be outputted and displayed quickly, and in order to search the recording position of the DVD in which the caption data desired by the user is recorded, the user must search the recording position directly through several keystrokes. Because of the inconvenience in use.

Accordingly, the present invention has been made in view of the above situation, and in an optical disc device such as a DVD player, when performing a normal playback operation, the caption data is read out, recorded and stored in a memory provided in the device, Accordingly, an object of the present invention is to provide a caption data reproduction method for quickly reproducing and outputting only caption data.

In addition, the present invention, in the optical disk device such as DVD player, etc., during the normal playback operation, the caption data is read and recorded in the memory provided in the device, and the recording position of the recorded video data stream including the caption data is recorded. The present invention provides a caption data search method for automatically searching and reproducing a recording position of an optical disc on which caption data corresponding to a character input by a user is recorded after storing searchable search information in association. will be.

1 is a block diagram illustrating a DVD player to which a caption data reproduction and search method according to the present invention is applied.

2 illustrates caption data and search information stored in association with a caption data reproduction and search method according to the present invention in a table form;

3A and 3B illustrate an operation flowchart of a caption data reproduction and search method according to the present invention;

4 and 5 illustrate a television screen corresponding to a caption learning mode and a caption search mode according to the present invention.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup

12: RF signal processor 13: digital signal processor

14: Video Decoder 15: Audio Decoder

16: caption decoder 17: signal summing unit

18: spindle motor 19: sled motor

20: servo unit 21: motor drive unit

22: control unit 23: memory

24: OSD generator

The caption data reproduction method according to the present invention for achieving the above object, the caption data recorded in the video data stream, and the recorded video data including the caption data while playing the video data stream recorded on the optical disc A first step of reading time information or position information for searching the recording position of the stream and storing the information in association with the memory; Reading the caption data stored in the memory and performing signal processing on the caption image; And outputting and displaying the signal-processed closed caption image through a screen of an external connection device.

Further, the caption data searching method according to the present invention, while reproducing the video data stream recorded on the optical disc, to search the caption data recorded in the video data stream and the recording position of the video data stream on which the caption data is recorded. Reading and retrieving search information, and storing the association information in a memory; Outputting and displaying a character input window for retrieving caption data stored in the memory through a screen of an external connection device; Searching for caption data corresponding to a character received through the character input window in the memory, and reading and confirming search information stored in association with the caption data; And searching for a recording position of a video data stream of the optical disc on which the caption data is recorded based on the search information.

Hereinafter, preferred embodiments of a caption data reproduction and search method according to the present invention will be described in detail with reference to the accompanying drawings.

First, the caption data reproduction and searching method according to the present invention can be applied to an optical disc device, for example, a DVD player or the like. The DVD player includes a video recorded on the optical disc 10, as shown in FIG. And an optical pickup 11, an RF signal processor 12, a digital signal processor 13, a video decoder 14 and an audio decoder 15 for reading out and reproducing audio data streams. And a caption decoder 16 for processing playback signals of the caption data recorded therein, and a memory 23 for recording and storing the caption data.

And a spindle motor 18 for rotating the optical disk, a sled motor 19 for moving the position of the optical pickup, and a motor driver 21 for driving control of the spindle motor and the sled motor. The servo unit 20 is included, and also includes an OSD generator 24 for generating and outputting an OSD image and a controller 22 for controlling the operation of the components.

Meanwhile, as shown in FIG. 2, the memory 23 searches for caption data read through the caption decoder 16 and a recording position of a recorded video data stream including the caption data. Information, for example, recording position information (Address) of the video data stream or presentation time stamp (PTS) may be stored in association.

In this case, the caption data recorded and stored in the memory 23 may be separately stored as a recording unit having a predetermined recording size, for example, a caption data entry (Caption_Data_Entry) having a temporal continuity. As the start recording position information (Start_Address) or the start reproduction time information (Start_PTS) of the caption data entry, the head caption data of the caption data entry is recorded at a value corresponding to the recording position information or the reproduction time information of the recorded video data stream. .

Meanwhile, when the user selects and inputs a predetermined key, for example, a 'caption learning key', the controller 22 reads the caption data recorded in the memory 23 and processes the signal as a caption image. Afterwards, the caption data reproduction operation of outputting and displaying through the screen of an external connection device such as a general television is performed.

In addition, when the user selects and inputs a preset key, for example, a 'caption search key', the controller 22 operates and controls the OSD generating unit 24 so that a text input window is displayed. After the output is displayed through the OSD screen of the external connected device such as the above, the caption data corresponding to the character received through the text input window is searched in the memory, and then the search information is stored in association with the caption data. Reads and confirms the caption data search operation for quickly searching and reproducing the recording position of the optical disc corresponding to the search information, which will be described in detail below.

First, FIGS. 3A and 3B illustrate an operation flowchart of a caption data reproduction and search method according to the present invention. As described above, in the controller 22, a DVD is input according to a normal user's reproduction key input. Each of the constituent means is controlled to perform a series of reproducing operations for reading out and reproducing the video data stream and the audio data stream from the DVD 10 inserted in the player (S10).

Meanwhile, the caption decoder 16 searches and reads caption data recorded as user data (User_Data) in the video data stream (S11), records and stores the caption data in the memory 23, and includes the caption data. The recording position information or the reproduction time information of the recorded video data stream is searched and stored together with the caption data as search information (S12).

In this case, the caption data recorded and stored in the memory 23 may be separately stored as caption data entries (Caption_Data_Entry) of a predetermined recording size having temporal continuity, as described above with reference to FIG. 2. The start recording position information (Start_Address) or the start playback time information (Start_PTS) of the video data stream including the caption data entry of the caption data entry is recorded, for example, a recording object unit (VOBU: Video Object Unit) having a predetermined recording size. May be stored in association with the caption data entry.

Thereafter, the controller 22 determines that a predetermined caption learning mode is requested from the user when a predetermined key, for example, a 'caption learning key' is input (S13). The normal playback operation is interrupted and the caption decoder 16 is controlled for operation.

Accordingly, the caption decoder 16 sequentially reads caption data stored in the memory 23 (S14), and displays caption images, that is, caption images, corresponding to the caption data on the screen of an external connection device such as a general television. The caption data reproducing operation of outputting the display is performed (S15).

In this case, when caption data is reproduced and output through the above-described process, the caption data is preset to be displayed and displayed together with the video image during the normal optical disc playback operation, for example, in the upper part or the lower part of the general television screen. By processing the signal as a caption image of a size larger than the size of the caption image set to be superimposed only, as shown in FIG. 4, the caption image of the large screen is output and displayed so that the user can easily display more caption characters on the same screen. Make sure you can watch.

In addition, as shown in FIG. 3B, when the predetermined specific key, for example, a 'caption search key' is input, the controller 22 determines that a corresponding caption search mode is requested from the user ( S20). The normal reproducing operation is stopped, and the OSD generator 24 is controlled for operation.

Accordingly, the OSD generating unit 24 generates an OSD input window for allowing a user to input a desired search character, and displays it on the screen of a general television as shown in FIG. 5. (S21).

Subsequently, when a key for requesting a search start is input from the user (S22), the controller 22 checks whether the search text inputted by the user, that is, a search word, is input through the OS input window, and is randomly input from the user. When a search word is input (S23), a series of caption data search operations are performed to compare and search whether caption data corresponding to the search word is recorded and stored in the memory 23 (S24).

When the caption data corresponding to the search word input by the user through the above process is stored in the memory, the search information associated with the caption data is searched and confirmed (S25), and the read confirmed search is performed. Using the information, that is, the recording position information or the reproduction time information, the recording position of the video data stream recorded on the DVD 10 is searched for (S26).

For example, when the controller 22 searches for and checks the start recording location information Start_Address of the caption data entry Caption_Data_Entry including the caption data corresponding to the search word, the controller 22 operates the servo unit 20. By controlling, the optical pickup 11 searches for the recording position of the video data stream having the start recording position information, and then automatically performs a normal playback operation of reading out and reproducing the video and audio data streams from the recording position. Preferably, the respective constituent means are controlled for operation.

In the meantime, when the controller 22 searches for and checks the start reproduction time information Start_PTS of the caption data entry Caption_Data_Entry including the caption data corresponding to the search word, the controller 22 operates and controls the servo unit 20. The optical pickup 11 searches for the recording position of the video data stream in which the start reproduction time information is recorded, and then automatically executes a normal reproduction operation of reading and reproducing the video and audio data streams from the recording position. The operation of each of the components is controlled.

As mentioned above, the above-described preferred embodiment of the present invention is disclosed for the purpose of illustration, and may be applied to another optical disc device other than a DVD player, and those skilled in the art will also appreciate the technical spirit of the present invention disclosed in the appended claims. And various other embodiments may be improved, changed, replaced or added to within the technical scope of the present invention.

Caption data reproduction and search method according to the present invention as described above, in the optical disk device, such as a DVD player, when performing the normal playback operation, the caption data is read and stored in the memory provided in the device, and then at the request of the user According to the present invention, the caption data is reproduced and outputted, or the caption data is recorded and stored in a memory, and the search information for searching for a recording position of the recorded video data stream including the caption data is stored. By searching and reproducing the recording position of the optical disc on which the caption data corresponding to the character is recorded, only the caption data can be outputted and displayed quickly even when the normal playback operation is stopped, and the caption data of the character desired by the user is recorded. Automatically and quickly the recording position of the video data stream It is a very useful invention that can be browsed and played back.

Claims (7)

While reproducing the video data stream recorded on the optical disc, caption data recorded in the video data stream and time information or position information for searching the recording position of the recorded video data stream including the caption data are read out, 1 step of storing in association with the memory; In a state in which a reproduction operation of the video data stream is stopped, in response to a user key input, reading caption data stored in the memory and performing signal processing on a caption image; And Caption data reproduction method comprising the step of outputting the signal-processed subtitle image through the entire screen of the external connection device. delete While reproducing the video data stream recorded on the optical disc, caption data recorded in the video data stream and search information for searching the recording position of the video data stream in which the caption data is recorded are read and stored in the memory. Step 1 to do; Outputting and displaying a character input window for searching for caption data stored in the memory through a screen of an external connection device; Searching for caption data corresponding to a character received through the character input window in the memory, and reading and confirming search information stored in association with the caption data; And Caption data searching method comprising: searching for a recording position of a video data stream of an optical disc on which the caption data is recorded based on the search information. The method of claim 3, wherein The search information is caption data search method, characterized in that the time information or position information that can search the recording position of the video data stream recorded with the caption data. The method of claim 3, wherein In the step 4, when the recording position of the video data stream is searched, the caption data searching method characterized in that the playback operation of the optical disc is automatically performed from the recording position. The method of claim 1, The caption image reproduction method of the caption data, characterized in that the output is displayed on the screen of the external connection device, without a video image. The method of claim 1, The size of the caption image is larger than the caption image in normal playback, and a larger amount of caption video is displayed on one screen than in normal playback.