JPH10108129A - Video disk reproduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and precisely change the size of a caption and its position by dividing data from a video disk into video data and caption data and reproducing and processing the caption data independently of the video data. SOLUTION: Data are read from a video disk 1 and a data detection circuit 6 divides the data into video data and caption data. Since the caption data as to a reference size and position are written in the data of a block from the data detection circuit 6, an image synthesis circuit 9 superimposes the data onto video data and the resulting data are displayed unless otherwise designated. In the case of desiring to change the caption size and position, a caption frame extract circuit 7 extracts the caption data, and a caption size and position conversion circuit 8 converts the caption size and designates the position of the caption data. Then the image synthesis circuit 9 superimposes the video data and the caption data after the conversion and displays the result onto a display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a video disc reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, there is a video disc on which a video signal with a caption is recorded, but when reproducing such a video disc, the position of the caption overlapping the background may be a problem. Therefore, there is a video disc reproducing apparatus which can change the position and size of the subtitles and display them on the screen when reproducing the video disc.

FIG. 5 is a block diagram showing an example of such a video disk reproducing apparatus, and FIG. 6 is a conceptual image diagram illustrating the operation of each component of the video disk reproducing apparatus shown in FIG. In FIG. 5, reference numeral 11 denotes a video disk on which video data in which captions (in this example, “captions” are superimposed) are superimposed on a video signal, 12 is a motor for rotating the video disc 11, and 13 is video data from the video disc 11. , A pickup circuit for reading the reproduced video data, a signal processing circuit for processing the reproduced video data, and a subtitle data from the video data ((A) in FIG. 6) processed by the signal processing circuit 15. (B)) and a subtitle separation circuit for separating the video signal ((C) in FIG. 6), 17
Is a subtitle size and position conversion circuit for converting the size and position of the subtitle data output from the subtitle separation circuit 16 ((D) in FIG. 6), and 18 is the video data from the subtitle separation circuit 16 and the subtitle size and position conversion This is a screen combining circuit that combines the subtitle data from the circuit 17 ((E) in FIG. 6).

[0004]

However, in the video disk reproducing apparatus having the above structure, the video disk 11
Since only the video data in which the subtitles are already overlapped with the original video signal is recorded in subtitles, it is easy to extract the subtitles if the background of the subtitles is only black (no video signal). If the background is not black (there is a video signal), only the subtitles cannot be accurately extracted depending on the background video signal, so that the subtitles whose size and position can be changed have been limited.

It is an object of the present invention to provide a video disk reproducing apparatus which reproduces a video disk on which a video signal with subtitles is recorded and allows the size and position of subtitles to be changed easily and accurately.

[0006]

A video disk reproducing apparatus according to the present invention records only a video signal without subtitles in a first signal block, and stores a reference size and position in a second signal block. Data reading means for reading data from a video disk on which subtitle data is recorded as graphic data, data detecting means for dividing the data read by the data reading means into video data and subtitle data, and A subtitle frame extracting unit that determines a subtitle frame of a size including all of the subtitle data from the subtitle data, and subtitle data within the subtitle frame extracted by the subtitle frame extracting unit to a specified size and position. The subtitle size and position conversion means to be converted, the subtitle data from the subtitle size and position conversion means and the data detection means It is made of the video data from the screen synthesizing means for synthesizing.

[0007]

The video signal with caption is divided into video data only and caption data only, only the video signal without caption is recorded in the first signal block of the video disc, and the reference size, The subtitle data having the position is recorded as graphic data. The video disc reproducing apparatus reproduces the video disc recorded as described above, separates the video data and the subtitle data by the data detection unit, and determines the subtitle frame including all the reference subtitle data by the subtitle frame extraction unit. Then, the subtitle data in the subtitle frame extracted by the subtitle frame extraction unit by the subtitle size and position conversion unit is converted into the specified size and position, and the subtitle data from the subtitle size and position conversion unit is converted by the screen synthesis unit. The video data from the data detection means is synthesized. Therefore,
Since the subtitle data is reproduced and processed independently of the original video signal, the extraction of the subtitle data can be performed accurately and easily regardless of the original video signal.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing an example of a video disc reproducing apparatus according to the present invention, and FIG.
FIG. 3 is a conceptual diagram illustrating the operation of each component of the video disc reproducing apparatus of FIG. 1; FIG. 3 is a flowchart illustrating the operation of the block diagram of FIG. 1; In FIG. 1, 1
Is a video disk, 2 is a motor for rotating the video disk 1, 3 is a pickup for reading data from the video disk 1, 4 is a servo circuit, 5 is a signal processing circuit for processing reproduced data, and 6 is a signal processing circuit 5. A data detection circuit for separating video data and subtitle data from the processed data; 7 a subtitle frame extraction circuit for determining a subtitle frame including all subtitle data from the subtitle data output from the data detection circuit 6; 8 a subtitle frame extraction circuit A subtitle size and position conversion circuit 9 for converting subtitle data in subtitle frame data output from 7 to a specified size and position; 9 a video data from the data detection circuit 6 and a subtitle size and position conversion circuit 8 This is a screen synthesis circuit that synthesizes subtitle data.

The video disk 1 reproduced by the video disk reproducing apparatus having the above-mentioned configuration can be, for example, a digital video disk (DVD) having a data structure shown in FIG. In this video disc, data is recorded as a series of units in which video data, subtitle data, and audio data are made independent blocks.

[0010] The DVD disk recorded as described above is reproduced as a video disk 1 to read data, and the data detection circuit 6 outputs video data (for example, (B) in FIG. 2) and subtitles (in this example, "subtitles"). (Character) data (for example, FIG. 2A). The caption data block data from the data detection circuit 6 has a reference size,
Since the subtitle data of the position is written, unless otherwise specified, this data is directly used by the screen synthesizing circuit 9.
By superimposing the video data on the video data from the data detection circuit 6, a video signal with subtitles can be displayed.

If it is desired to change the size and position of the subtitle, the subtitle frame extraction circuit 7 determines where the reference subtitle data is located on the screen, and determines a frame including all the determined subtitle data. . That is, this frame includes all subtitle data of the reference size and position, and the size of the extracted subtitle frame is automatically changed according to the number of characters of the subtitle and the like. Next, the subtitle size and position conversion circuit 8
Then, extract the graphic data of the subtitles within this frame,
Data obtained by enlarging or reducing the data to a specified size and moving the data to a specified position is defined as final caption data (for example, (C) in FIG. 2). Then, the screen synthesis circuit 9
Then, a signal obtained by superimposing the final caption data and the original video signal from the data detection circuit 6 is used as the final signal, so that the video signal whose subtitle size and position have been changed (for example, (D in FIG. 2) )) Is output and displayed on a display (not shown).

The above operation will be described with reference to the flowchart of FIG. In step S1, data is read from the video disk 1. In step S2, video data and caption data are separately detected by the data detection circuit 6, and data detection is performed.
If the detected data is image (video) data, the process proceeds to step S6, and if the detected data is subtitle data, the process proceeds to step S3. In step S3, the subtitle frame extraction circuit 7
In step S4, the subtitle data frame is extracted. In step S4, the subtitle size is converted by the subtitle size and position conversion circuit 8, the subtitle position is specified in step S5, and in step S6, the image data of step S2 is In step S5, the converted subtitle data is superimposed and displayed on the display.

As described above, the size and position of the subtitle can be changed every time, but when the size and position to be displayed are determined, the values are stored in the video disc as initial values so that they can be read. As a result, a caption of a fixed size and position can always be displayed unless the value is changed.

Since the subtitle data is written on the video disk independently of the original video signal, the extraction of the subtitle data can be performed accurately and easily regardless of the original video signal. Therefore, the size and position of the caption can be changed regardless of the video signal serving as the background of the caption. Therefore,
The display position of the subtitle can be easily changed freely, and the subtitle size can be changed according to the size of the display screen.

[0015]

According to the present invention, it is possible to obtain a video disk reproducing apparatus capable of reproducing a video disk on which a video signal with a subtitle is recorded and changing the size and position of the subtitle easily and accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a video disc reproducing apparatus according to the present invention.

FIG. 2 is an image conceptual diagram illustrating an operation of each component of the video disk reproducing device of FIG. 1;

FIG. 3 is a flowchart illustrating the operation of the block diagram of FIG. 1;

FIG. 4 is an example of a data structure of a digital video disk used as a video disk according to the present invention.

FIG. 5 is a block diagram showing an example of a conventional video disc reproducing apparatus.

6 is an image conceptual diagram illustrating an operation of each component of the video disk reproducing device of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Video disk 2 Motor 3 Pickup 4 Servo circuit 5 Signal processing circuit 6 Data detection circuit 7 Caption frame extraction circuit 8 Caption size and position conversion circuit 9 Screen composition circuit

Claims (1)

[Claims] 1. A video signal in which only a video signal without caption is recorded in a first signal block and caption data having a reference size and position is recorded as graphic data in a second signal block. Data reading means for reading, data detecting means for dividing the data read by the data reading means into video data and subtitle data, and a size including all of the subtitle data from the subtitle data by the data detecting means A subtitle frame extracting unit that determines the subtitle frame of the subtitle frame, subtitle data in the subtitle frame extracted by the subtitle frame extracting unit, a subtitle size and position converting unit that converts the subtitle data into a specified size and position, Screen synthesizing means for synthesizing subtitle data from the position converting means and video data from the data detecting means. A video disk playback device characterized by the following.