JPH11122584A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize sub video information being bit map data by providing a changeover processing section that superimposes sub video information onto main video information and provides an output of the result, or that provides outputs of the main video information and the sub video information separately. SOLUTION: A video decoder 103 applies decoding to video data that are compressed by the MPEG system and provides an output of it as the main video information to a changeover processing section 106. Furthermore, a sub picture decoder 104 applies decoding to sub picture data, converts the data into bit map data and provides an output of the converted data to the changeover processing section 106. The changeover processing section 106 selects whether sub video information is superimposed onto main video information and the superimposed signal is outputted or the sub video information and the main video information are separately outputted based on an instruction from a control means. Thus, the sub video information and the main video information are outputted on different monitors respectively making the content of the sub video information different from that of the main video information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus capable of reproducing video information and audio information recorded on a recording medium.

[0002]

2. Description of the Related Art Although compact disks (CDs) have become widespread as optical disks, it has been considered difficult to record and reproduce video information over a long period of time in terms of recording capacity. Therefore, development of an optical disk capable of recording video information and audio information at high density has been desired.

In such a situation, in recent years, a digital versatile disk (DVD) capable of recording data of a moving image and recording long-term video information and audio information has recently been developed. ) Was developed. A DVD records information by using pits having a width and a length that are about half those of conventional pits on a CD. The information includes main video information, sub-video information such as characters, and music and the like. This is a time-division multiplexed recording of audio information.

In order to record moving picture information for a long time, D
VD stands for MPEG (Moving Picture Image Coding Exper
A data compression method called “t Group” is used, and the amount of information is compressed by a method such as encoding data using a correlation within a frame or between frames.

[0005] A reproducing apparatus for reproducing the DVD will be described. FIG. 4 is a schematic diagram showing a schematic configuration of a conventional reproducing apparatus. 4, the playback device 401 includes a data processor 402, a video decoder 403, a sub-picture decoder 404, an audio decoder 405, and a video mixing unit 406. Video information played back by the playback device 401 is displayed on a monitor 407, The audio information is output from the speaker 408.

In the reproducing apparatus 401, a recording medium (DV
D) The digital data read from 409 is separated by the data processor 402 into video data, sub-picture data and audio data, the video data is sent to the video decoder 403, the sub-picture data is sent to the sub-picture decoder 404, and the audio data Is output to the audio decoder 405.

[0007] Video decoder 403 decodes the video data and outputs it to video mixing section 406 as main video information. Further, the sub-picture decoder 404 converts the sub-picture data into bitmap data, which is sub-picture information, and outputs it to the video mixing unit 406. Video mixing unit 4
Reference numeral 06 superimposes sub-picture information, which is bitmap data output from the sub-picture decoder 404, on main video information output from the video decoder 403, and outputs the resultant to the monitor 407 as video information.

The audio data output from the data processor 402 is decoded into audio information by an audio decoder 405 and output from a speaker 408 via an amplifier (not shown).

[0009]

The playback apparatus described above has
Video information in which captions are superimposed on a moving image such as a movie is output to a monitor, and audio information is output to a speaker. The sub-picture information that is bitmap data can also represent a pattern other than characters, but the output from the playback device is video information in which the sub-picture information is superimposed on the main video information. It is used only for characters such as subtitles and lyrics for movies.

[0010] That is, the bitmap data as the sub-picture information can express a picture or the like, but is output only by being superimposed on the main picture information, so that it is used only as characters such as lyrics and subtitles. Are not effectively used as bitmap data capable of displaying pictures and the like.

In view of the above, according to the present invention, by outputting separately the main video information and the sub video information reproduced from the recording medium, it is possible to effectively use the sub video information which is bitmap data. It is an object of the present invention to provide a playback device that can perform the playback.

[0012]

According to the first aspect of the present invention, there is provided a reproducing apparatus capable of reproducing video information and audio information recorded as digital data on a recording medium. A data processor that separates the obtained digital data into video data and sub-picture data, a video decoder that performs a decoding process on the video data to generate main video information, and a decoder that performs a decoding process on the sub-picture data to generate sub-video information It is characterized by comprising a sub-picture decoder and a switching processing unit for performing switching so as to superimpose the sub-picture information on the main picture information and to output the main picture information and the sub-picture information separately.

In the present invention according to claim 2,
2. The playback device according to claim 1, wherein the first monitor is configured to display the main video information on which the main video information or the sub-video information output from the switching processing unit is superimposed, and the first monitor is disposed at a distance from the first monitor. And a second monitor for displaying the sub-picture information output from the switching processing unit.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a schematic configuration of one embodiment of a reproducing apparatus according to the present invention. In FIG. 1, the reproducing apparatus 101 includes a data processor 102, a video decoder 103, a sub-picture decoder 104, an audio decoder 105, and a switching processing unit 106. Here, the recording medium 107 is an optical disk (DVD).

The data processor 102 includes a storage medium 10
7 is separated into video data, sub-picture data, and audio data, and the video data is output to a video decoder 103, the sub-picture data is output to a sub-picture decoder 104, and the audio data is output to an audio decoder 105.

The video data is moving image data that has been compressed by the MPEG method. The sub-picture data is bitmap data representing run-length encoded characters and the like. The audio data is audio or music data encoded by a PCM (Pulse Code Modulation) method, an audio encoding method capable of providing a sense of realism by a plurality of channel data, or the like.

The sub-picture data is divided into pixel data and control data, and is converted into bitmap data by a decoding process. In the control data, information on the display position of the bitmap data on the monitor, the display pixel color, and the contrast of the display pixel is recorded.

The video decoder 103 decodes the video data compressed by the MPEG system and outputs the decoded video data to the switching processing unit 106 as main video information. Further, the sub-picture decoder 104 performs a decoding process on the sub-picture data, converts the data into bitmap data, and outputs the bitmap data to the switching processing unit 106. The audio decoder 105 decodes and outputs audio data.

The switching processing unit 106 superimposes the sub-picture information on the main picture information and outputs it, or separates the main picture information and the sub-picture information separately according to an instruction from a control means (not shown). Switch whether to output.

The playback apparatus having the above configuration can switch between superimposing and outputting the main video information and the sub video information or outputting them separately. The video information can be used to display a pattern other than characters. That is, since the main video information and the sub video information can be separately output to different monitors as the sub video information having a different content from the main video information, the user can enjoy the video more.

FIG. 2 is a schematic diagram showing a schematic configuration of another embodiment of the reproducing apparatus of the present invention. In FIG. 2, a playback device 201 includes a data processor 202, a video decoder 203, a sub-picture decoder 204, an audio decoder 205, a switching processing unit 206, and a first monitor 20.
And a second monitor 208. Playback device 201
Are displayed on the first monitor 207, and the sub-video information is displayed on the second monitor 208. The audio information output from the playback device 201 is output from the speaker 209 via an amplifier (not shown).
Here, the recording medium 210 is an optical disk (DVD).

The data processor 202 stores the data in the recording medium 21.
The digital data read from 0 is separated into video data, sub-picture data, and audio data, and the video data is output to the video decoder 203, the sub-picture data is output to the sub-picture decoder 204, and the audio data is output to the audio decoder 205.

The video data is moving image data that has been compressed by the MPEG method. The sub-picture data is bitmap data representing run-length encoded characters and the like. The audio data is audio or music data encoded by a PCM (Pulse Code Modulation) method, an audio encoding method capable of providing a sense of realism by a plurality of channel data, or the like.

The sub-picture data is divided into pixel data and control data, and is converted into bitmap data by a decoding process. In the control data, information on the display position of the bitmap data on the monitor, the display pixel color, and the contrast of the display pixel is recorded.

The sub-picture data has the following types of pixels:
There are four types: background pixel (BackgroundPixel), pattern pixel (Pattern Pixel), emphasis pixel 1 (Emphasis Pixel)
1) There is an emphasis pixel 2 (Emphasis Pixel 2). For example, when sub-picture information is used for a caption or the like, it is often configured by a combination of a background pixel and one of a pattern pixel or one of the emphasized pixels 1 and 2. When superimposed on the main video information, the contrast of the background pixel (transmittance with the main video information) is often set to 0, and the subtitle portion is often displayed as the contrast 1.

The video decoder 203 performs a decoding process on the video data compressed by the MPEG system and outputs the decoded video data to the switching unit 206 as main video information. Further, the sub-picture decoder 204 performs a decoding process on the sub-picture data, converts the data into bitmap data, and outputs the bitmap data to the switching processing unit 206. The audio decoder 205 decodes and outputs audio data.

The switching processing unit 206 superimposes the sub-picture information on the main picture information and outputs it, or separates the main picture information and the sub-picture information separately according to an instruction from a control means (not shown). Switch whether to output.

In the reproducing apparatus 201 having the above configuration, the digital data read from the recording medium 210 is separated into video data, sub-picture data, and audio data by the data processor 202 and then decoded by the respective decoders. Processing is performed. The video data and the sub-picture data are input to the switching processing unit 206. The switching processing unit 206 superimposes the sub-video information on the main video information and displays it on the first monitor 207 or sets the main video information on the first monitor 207 according to the setting of the control unit (not shown). The sub-picture information is displayed on the second monitor 208. The audio data separated by the data processor 202 is subjected to a decoding process by an audio decoder 205 and output from a speaker 209 via an amplifier (not shown).

The above-described reproducing apparatus 201 will be specifically described. FIG. 3 is a schematic diagram for explaining the playback device of the present embodiment. In the playback device 201 shown in FIG.
A television or the like is used for the first monitor 207, and the second monitor 20
The monitor 8 uses a liquid crystal shutter. The first monitor 207 and the second monitor 208 are arranged with a distance therebetween without making close contact. Then, the first monitor 20
By displaying the main video information on 7 and the sub-video information on the second monitor 208, it is possible to obtain a video having a stereoscopic effect.

For example, a moving image of a fish swimming is displayed on the first monitor 207, foam in the water tank is displayed on the second monitor 208, and a moving image of a bird flying in the sky is displayed on the first monitor 207. By displaying an image and displaying clouds floating in the sky on the second monitor 208, an image having a three-dimensional effect can be obtained.

The foam to be displayed on the second monitor 208 is generated by bitmap data as sub-picture data. From the control data of the sub-picture data decoded by the sub-picture decoder 204, the bit map data is displayed in the 720 × 478 area of the second monitor 208. Here, the maximum display size of the bitmap data is an area of 720 × 478, and the maximum display size of the main video information is an area of 720 × 480. Set to release.

Second monitor 20 using liquid crystal shutter
In FIG. 8, the portion where the background pixel of the bitmap data is set is released by the liquid crystal shutter, and the portion of the pixel where the background pixel is not set is closed by the liquid crystal shutter, so that the pixel is set on the second monitor 208. The part is displayed as foam, and the other area can be seen through the main video information.

The above-described setting of the foam is a case where the contrast of the display pixel is set to 1 while the contrast of the background pixel is set to 0. The degree of opening and closing of the liquid crystal shutter is adjusted in accordance with the contrast of the display pixel. May be adjusted.

That is, as shown in FIG. 3, an image of a fish swimming in an aquarium is displayed on the first monitor 207, and a second monitor 208 arranged at a distance from the first monitor 207.
Shows the foam in the aquarium. For this reason, the bubbles of the sub-picture information appear to be raised in front of the fish picture of the main picture information, so that the picture has a three-dimensional effect.

As described above, the first monitor 207 and the second monitor 208 are arranged with a distance between them,
07, the second monitor 20 displays the main image information so that the main image information can be seen through except for the pixel portion of the sub-image information.
By displaying the sub-picture information on 8, an image with a three-dimensional effect can be obtained.

Further, the reproducing apparatus of this embodiment may be used for video such as a movie. In such a case, it is possible to obtain a three-dimensional effect by making subtitles pop out to the front of a video such as a movie. Further, since the video and the subtitle appear to be separated, even if the video is originally hidden behind the subtitle and cannot be seen, the video can be easily viewed by changing the viewing angle.

[0037]

According to the present invention, by outputting separately the main video information and the sub video information reproduced from the recording medium, the sub video information which is bitmap data can be effectively used. Further, since the main video information and the sub video information can be output separately, a video with a three-dimensional effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of an embodiment in a reproducing apparatus of the present invention.

FIG. 2 is a schematic diagram showing a schematic configuration of another embodiment of the reproducing apparatus of the present invention.

FIG. 3 is a schematic diagram for explaining the playback device of the present embodiment.

FIG. 4 is a schematic diagram showing a schematic configuration of a conventional reproducing apparatus.

[Description of Reference Codes] 101 playback device, 102 data processor, 1
03 video decoder, 104 sub-picture decoder, 105 audio decoder, 106 switching processing unit, 107 recording medium 201 playback device, 202 data processor, 2
03 video decoder, 204 sub-picture decoder, 205 audio decoder, 206 switching processor, 207 first monitor, 208 second monitor, 209 speaker, 210 recording medium 301 playback device, 302 data processor, 3
03 video decoder, 304 subpicture decoder, 305 audio decoder, 306 video mixing unit, 307 monitor, 308 speaker, 3
09 Recording media

Claims (2)

[Claims] 1. A reproducing apparatus capable of reproducing video information and audio information recorded as digital data on a recording medium, wherein said digital data reproduced from said recording medium is separated into video data and sub-picture data. A video decoder for performing decoding processing on the video data to generate main video information; a sub-picture decoder for performing decoding processing on the sub-picture data to generate sub-video information; A reproducing apparatus comprising: a reproducing apparatus including a switching processing unit that performs output by superimposing video information or that separately outputs the main video information and the sub-video information. 2. The reproduction apparatus according to claim 1, wherein the first monitor displays the main video information or the main video information superimposed with the sub-video information output from the switching processing unit, and the first monitor. A second monitor arranged at a distance from the second processing unit to display the sub-picture information output from the switching processing unit.