JP2001036865A - Video reproducer and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video reproducer which records information of plural languages in particular with respect to the video reproducer for reproducing video information. SOLUTION: In a video reproducer which reproduces a main video, a sub- video of plural languages synchronized with the former main video and sound of plural channels, (n) decoded, which are obtained by being decoded by reading means 2, 3 and 4 for reading encoding data of the sub-video of the plural languages, (n) decoding means 7 for decoding the encoding data read by the reading means and generating the (n) decoding data and the (n) decoding means, are mixed outputted by a mixing circuit 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for recording information on a recording medium such as an optical disk and reproducing the recorded information, and in particular, a video reproducing apparatus for a recording medium on which multilingual information is recorded. About.

[0002]

2. Description of the Related Art DVDs on which compression-encoded video information, sub-picture information and audio information are recorded are on the market. In this optical disc, sub-picture information and audio information are recorded in a plurality of languages, and any language can be selected by an application of the information reproducing apparatus during reproduction. The sub-picture information includes subtitle information and commentary information of a movie.

[0003]

The subtitle information, which is sub-picture information recorded on an information recording medium, can be switched in language during playback, but only one of the languages can be displayed. I could not do it. For this reason, subtitle information cannot be displayed at the same time even if it supports multiple languages, so even if you watch a movie at the same time as a foreigner who can not understand Japanese or English (for example, French) (only audio is in English) There was a problem that foreigners could not understand the contents of the movie.

Accordingly, it is an object of the present invention to provide an information reproducing apparatus capable of simultaneously viewing a plurality of languages. It is another object of the present invention to provide an information reproducing apparatus which can save the trouble of returning a disk to a short time when a person who is slow in reading subtitles fails to read subtitles.

[0005]

In order to solve this problem, the present invention is directed to a main image, a sub-image in a plurality of languages synchronized with the main image, and encoded data of audio in a plurality of channels. A main video read / decode means for reading and decoding the encoded data of the main video, a sub video encoded data read means for reading the encoded data of the sub video in a plurality of languages, N decoding means for decoding the encoded data read by the encoded data reading means to generate decoded data; and decoding decoded data selected from the n decoded data decoded by the n decoding means. And a mixing circuit that mixes and outputs the main video with the main video, wherein the main video and a plurality of languages synchronized with the main video are provided. In a video playback device that plays back a recording signal from a recording medium on which sub-pictures and encoded data of a plurality of channels of audio are recorded, a main picture reading and decoding unit that reads and decodes the encoded data of the main picture from the recording medium, A sub-picture encoded data reading means for reading the encoded data of the sub-pictures of the plurality of languages from the recording medium; and decoding the encoded data read by the sub-picture encoded data reading means to generate decoded data. Decoding means, and a mixing circuit for mixing decoded data selected from the n decoded data decoded by the n decoding means with the decoded main video and outputting the mixed data. A video playback apparatus is provided, wherein the invention of claim 3 records a main video, sub-videos in a plurality of languages synchronized with the main video, and coded data of audio in a plurality of channels. A video reproducing apparatus for reproducing a recording signal from a recorded recording medium, a main video reading and decoding means for reading and decoding encoded data of the main video from the recording medium, and encoding of the multi-language sub-video from the recording medium. Sub-picture encoded data reading means for reading data; decoding means for decoding the encoded data read by the sub-picture encoded data reading means at n times the normal decoding processing speed to generate decoded data; N storage means for storing the decoded data decoded by the decoding means for each of the languages; and a main memory for decoding the decoded data selected from the n decoded data obtained by the n storage means. 5. A video reproducing apparatus comprising: a mixing circuit for mixing and outputting a video and a main video; and a sub-video synchronized with the main video. And, in a video reproducing apparatus of a recording medium on which audio information is recorded, a main video reading and decoding unit that reads and decodes the encoded data of the main video from the recording medium, and encodes the encoded data of the sub video from the recording medium. Sub-picture encoded data reading means to be read, decoding means to decode the encoded data read by the sub-picture encoded data reading means to generate decoded data, and sequentially shift the decoded data decoded by the decoding means. And a mixing circuit for mixing decoded data selected from among the n decoded data obtained by the n storage means with the decoded main video and outputting the mixed data. The present invention provides a video playback apparatus characterized in that a main video, sub-videos of a plurality of languages synchronized with the main video, and audio data of a plurality of channels are encoded. In the video reproducing method for reproducing the data, the encoded data of the main video and the encoded data of the sub-video in the plurality of languages are read out, and the read-out encoded data of the main video are decoded by decoding means. The encoded data of the sub-picture is decoded by n decoding means, and the decoded data selected from the n decoded data decoded by the n decoding means is mixed with the decoded main picture and output. And a video recording method in which a main video, sub-videos in a plurality of languages synchronized with the main video, and audio data of a plurality of channels are recorded. In a video reproducing method for reproducing a recording signal from a medium, encoded data of the main video and encoded data of sub-videos in the plurality of languages are respectively read from the recording medium, and the main video is encoded. The encoded data of the read sub-picture is decoded by n decoding means, and the decoded data selected from the n decoded data decoded by the n decoding means is decoded by the decoding means. 8. A method for reproducing a video, wherein the video is mixed with the decoded main video and outputted. The invention according to claim 7, wherein the main video, a sub-video in a plurality of languages synchronized with the video, and a plurality of channels are provided. In a video reproduction method of reproducing a recording signal from a recording medium on which encoded data of audio is recorded, the encoded data of the main video and the encoded data of the sub-video in the plurality of languages are read from the recording medium, respectively. The encoded data of the main video is decoded by decoding means, and the read encoded data of the sub-video is converted to n at a normal decoding processing speed.
The decoded data is decoded by the decoding unit having double speed, and the decoded data decoded by the decoding unit is stored in the n storage units for each of the languages, and among the n decoded data obtained by the n storage units, A video reproduction method characterized in that the decoded data selected from the above is mixed with the encoded data of the main video decoded and output, and the invention of claim 8 provides a main video, In a video playback method for a recording medium on which a synchronized sub-picture and audio information are recorded, the encoded data of the main picture and the encoded data of the sub-picture are read from the recording medium, respectively, and the encoded data of the main picture are read out. And coded data of sub-pictures are respectively decoded by decoding means, the sub-pictures decoded by the decoding means are sequentially shifted and stored in n storage means, and the n data obtained by the n storage means are Decryption of To provide a video reproducing method characterized by the the to select the decoded data decoded by mixing with the main video output from the motor.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a video reproducing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a hardware configuration of a system according to an embodiment of the present invention.

As shown in FIG. 1, a video reproducing apparatus D
The VD playback device 100 transmits the RF from the recording medium (DVD) 1
A pickup 2 for reproducing a signal, and the pickup 2
Is supplied, and the RF signal 2
An RF circuit 3 for performing a value conversion process and the like; a data decoder 4 to which reproduction data is supplied from the RF circuit 3 to perform a decoding process such as an error correction; A demultiplexer 5 for distributing the data into compressed sub-picture data and compressed audio data.

[0008] Here, subtitles, subtitle data, character information, and audio data have various languages.
Multiple languages to be decoded are selected. This is selected according to the control of the system control unit 12.

[0009] The video compressed data separated by the demultiplexer 5 is supplied to a video decoder 6 and subjected to a decoding process corresponding to the type of the display device. For example, NTS
It is converted to C, PAL, SECAM, wide screen, or the like. The sub-picture compressed data separated by the demultiplexer 5 is supplied to the sub-picture decoder 7 and decoded as subtitles and character images.

[0010] The video data decoded by the video decoder 6 is input to an adder 9, where it is added to the subtitles and character images from the sub-picture decoder 7, and the added output is led to a video output terminal 10. The audio data separated by the demultiplexer 5 is supplied to the audio decoder 8 and demodulated, and is output to the audio output terminal 11.

The DVD reproducing apparatus 100 further includes a system controller 1 for controlling the pickup 2, RF circuit 3, data decoder 4, demultiplexer 5, video decoder 6, sub-picture decoder 7, and audio decoder 8.
2 and a remote control operation unit 13 for the user to operate and input the system control unit 12.

As shown in FIG. 2, the recording medium 1 reproduced by the DVD reproducing apparatus 100 is recorded as a unit of one movie or the like by a Video Object Set (hereinafter referred to as VOBS). I have.

The VOBS is composed of a plurality of Video Objects (VOBs). DVD is
For example, it is configured such that different movies are developed in different VOBs corresponding to a multi-story function that allows one movie to be viewed in a plurality of stories. And
The VOB is composed of a plurality of cells.

The cell Cell is a unit such as one scene in a movie. In other words, the combination for each scene becomes a VOB, and the difference in the combination constitutes the multi-story function. The cell Cell includes a plurality of video object units Video
It is composed of ObjectUnit (hereinafter referred to as VOBU).

[0015] One VOBU includes one navigation pack (NVPCK), a plurality of audio packs (APCK), a plurality of video packs (VPCK), and a plurality of sub-picture packs (SPPCK).

The navigation pack (NVPCK)
It is mainly used as control data for controlling reproduction and display of data in the VOBU to which the VOBU belongs, and control data for performing data search of the VOBU.

A video pack (VPCK) is main video information and is compressed according to a standard such as MPEG. The sub-picture pack (SPPCK) is sub-picture information having auxiliary contents with respect to the main picture. An audio pack (APCK) is audio information.

FIG. 3 shows an embodiment of a sub-picture packet. The information of the sub-picture is recorded in the data area as a pack sequence. That is, one pack (SPPC
K) are arranged in the order of a pack header, a packet header, a sub-stream ID, and sub-picture data. The demultiplexer determines the SPPCK by referring to the stream ID and the upper bit of the substream ID described in the pack header.

When the stream to be reproduced is selected and determined based on the control of the system control unit 12, the lower bits of the sub-stream ID of the packet are referred to, and the sub-stream corresponding to the selected stream is referred to. The packet having the ID is sorted by the demultiplexer 5 and supplied to the sub-picture decoder 7 to be decoded.

The DVD reproducing apparatus 100 of the present invention is configured to simultaneously reproduce subtitle data in a plurality of languages. FIG. 4 shows a detailed view of the sub-picture decoder (the sub-picture decoder 7 in FIG. 1) of the DVD reproducing apparatus of the present invention.

As shown in FIG. 4, in this DVD reproducing apparatus, the first sub-picture decoder 7 which is supplied by switching the sub-picture compressed data from the demultiplexer 5 for each subtitle data of each country by a switch 70 is provided.
1, the second sub-picture decoder 72, the n-th sub-picture decoder 73, and the first video decoder 7
And a mixing circuit 74 for mixing decoded image (caption) data output from the first, second video decoder 72, and the n-th sub-picture decoder 73, respectively.

The image (caption) data mixed here is
The selection is performed by the switches 71S, 72S, and 73S, and only the selected image data is mixed by the mixing circuit 74. The present invention uses n sub-picture decoders, usually one.
The feature is that it is provided.

The DVD reproducing apparatus 10 configured as described above
0 is the decoded subtitle data output from the first sub-picture decoder 71, the decoded subtitle data output from the second sub-picture decoder 72, and the decoding output from the n-th sub-picture decoder 73 by the mixing circuit 74. The subtitle data and the video data output from the video decoder 6 are mixed by the adder 9 and output.

By mixing and outputting in this way, for example, the first sub-picture decoder 71 outputs decoded sub-picture data constituting the first subtitle information,
When the decoded sub-picture data constituting the second subtitle information is output from the sub-picture decoder 72 of FIG.
As shown in FIG. 5A and FIG. 5B, the first subtitle data (shown in FIG. 5A) and the second subtitle data (FIG.
(B). ) Can be displayed simultaneously (shown in FIG. 5C).

FIG. 6 is a block diagram showing a second embodiment of the sub-picture decoder of the video reproducing apparatus according to the present invention. A changeover switch 76 is provided after the sub-picture decoder 75, and a first subtitle data memory 77, a second subtitle data memory 78, an n-th subtitle data memory 79, and a first subtitle data memory 79 are provided for each subtitle data of each country. Data memory 7
7, a second subtitle data memory 78, and a mixing circuit 74 for mixing the decoded subtitle data output from the n-th subtitle data memory 79.

The image data to be mixed here is selected by the switches 77S, 78S, 79S, and only the selected image data is mixed by the mixing circuit 74. In the case of this configuration, the processing speed of the sub-picture decoder 75 needs to be n times the processing speed of the sub-picture decoder of the normal decoding processing speed in FIG.

Next, how the sub-picture stream is determined when the recording medium 1 shown in FIG. 1 is reproduced by the DVD reproducing apparatus 100 will be described below. Since sub-pictures of a plurality of languages are recorded on the recording medium 1, a plurality of arbitrary sub-pictures can be selected when the reproducing apparatus is started.
When the reproducing apparatus starts reproducing, the management information of the optical disk is read, demodulated and error corrected, and then supplied to the system controller 12 through the demultiplexer 5.

The system control unit 12 reads the language code and grasps what kind of language exists as a sub-picture. As shown in FIG. 7, when a menu screen of a plurality of subtitles such as Japanese, English, French, and German is displayed, the viewer operates the remote controller 13 to select a desired channel. Select multiple subtitles from. The reproduction stream of the sub-picture is determined by selecting some in this way.

Next, a third embodiment of the video reproducing apparatus of the present invention will be described below with reference to the drawings. As shown in FIG. 8, this embodiment is a DVD reproducing apparatus configured to reproduce a DVD by applying the video reproducing apparatus according to the present invention. The DVD reproducing apparatus according to this embodiment is configured not to display subtitles in a plurality of countries, but to display subtitles in one country, but to display subtitles up to n times before. .

Therefore, in this DVD reproducing apparatus, as shown in FIG. 8, the configuration of the sub-picture decoder loads the subtitle data processed by the sub-picture decoder into the first subtitle data memory 77, and the subtitle data is newly stored in the first subtitle data memory 77. When input to the first subtitle data memory 77, the subtitle data in the first subtitle data memory 77 is converted to the second subtitle data memory 7
8, the subtitle data in the second subtitle data memory 78 is sequentially shifted to the next subtitle data memory.

It is also possible to hold without shifting by the switches 80 and 81. Further, it has a mixing circuit 74 for mixing the decoded caption data output from the caption data memories 77, 78, 79. The image data to be mixed here is determined by switches 77S, 78S, 79S
And the mixing circuit 74 mixes only the selected image data.

FIG. 9 shows a monitor screen of the DVD reproducing apparatus according to the embodiment. FIG. 9A shows an example in which the previous subtitle is displayed, and FIG. 9B shows an example in which the desired subtitle is held. DVD playback device 100 configured as above
Can display the subtitles up to n times earlier, so that if a person who is slow to read the subtitles fails to read the subtitles, it can save the trouble of returning the disc to a slightly earlier position.

It is also possible to hold desired subtitles, such as subtitles that could not be read well, while the reproduction is continued by the remote control operation unit 13. By doing so, it is possible to prevent the subtitles from being missed.

[0034]

According to the present invention, by displaying subtitle information, which is transmitted or reproduced subpicture information, in multiple languages at the same time, a foreigner who cannot understand Japanese or English (for example, France) Foreigners can understand the contents of the movie by displaying Japanese subtitles and French subtitles at the same time as watching the movie (in English only). It is also effective when learning a language by displaying many languages.

Further, according to the present invention, it is possible to display the subtitles up to the nth subtitle, so that if a person who is slow to read the subtitles fails to read the subtitles, it is possible to save the trouble of returning the disk to a slightly earlier position. Can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a hardware configuration of a system according to a first embodiment of a video playback device of the present invention.

FIG. 2 shows a video object set (VOB) to be transmitted.
FIG. 3 is a diagram illustrating an example of the configuration of S).

FIG. 3 is a diagram showing a configuration of a data packet of a sub-picture.

FIG. 4 is a detailed block diagram of a sub-picture decoder of the first embodiment of the video reproducing apparatus of the present invention.

FIG. 5 shows a bilingual subtitle screen of the first embodiment of the video reproducing apparatus of the present invention.

FIG. 6 is a detailed block diagram of a sub-picture decoder of a video reproducing apparatus according to a second embodiment of the present invention.

FIG. 7 shows a subtitle selection menu screen of the second embodiment of the video reproducing apparatus of the present invention.

FIG. 8 shows a detailed block diagram of a sub-picture decoder of a third embodiment of the video reproducing apparatus of the present invention.

FIG. 9 shows a monitor screen of a third embodiment of the video reproducing apparatus of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Recording medium (DVD) 2 Pickup 3 RF circuit 4 Data decoder 5 Demultiplexer 6 Video decoder 7, 75 sub-picture decoder 8 Audio decoder 9 Adder 10 Video output terminal 11 Audio output terminal 12 System control part 13 Remote control operation part 70, 76, 80, 81 switch 71 first sub-picture decoder 71S, 72S, 73S, 77S, 78S, 79S switch 72 second sub-picture decoder 73 n-th sub-picture decoder 74 mixing circuit 77 first subtitle data memory 78 second subtitle data memory 79 n-th subtitle data memory 100 DVD playback device (recording medium playback device)

Claims (8)

[Claims] An image reproducing apparatus for reproducing encoded data of a main video, sub-videos of a plurality of languages synchronized with the main video, and audio of a plurality of channels, wherein a main video for reading and decoding the encoded data of the main video. Reading / decoding means; sub-picture coded data reading means for reading coded data of the sub-pictures of the plurality of languages; and decoding the coded data read by the sub-picture coded data reading means to generate decoded data. Decoding means, and a mixing circuit for mixing and outputting decoded data selected from n decoded data decoded by the n decoding means with the decoded main video. Video playback device. 2. A video reproducing apparatus for reproducing a recording signal from a recording medium in which a main video, sub-videos of a plurality of languages synchronized with the main video, and audio encoded data of a plurality of channels are recorded. Main video read / decode means for reading and decoding the encoded data of the main video; sub video encoded data read means for reading the encoded data of the multi-language sub video from the recording medium; and read of the sub video encoded data Means for decoding the coded data read by the means to generate decoded data, and the main video decoding the decoded data selected from the n pieces of decoded data decoded by the n pieces of decoding means And a mixing circuit for mixing and outputting. 3. A video reproducing apparatus for reproducing a recording signal from a recording medium in which a main video, sub-videos of a plurality of languages synchronized with the main video, and audio data of a plurality of channels are recorded. Main video read / decode means for reading and decoding the encoded data of the main video; sub video encoded data read means for reading the encoded data of the multi-language sub video from the recording medium; and read of the sub video encoded data Decoding means for decoding the encoded data read by the means at n times the normal decoding processing speed to generate decoded data; and n storages for storing the decoded data decoded by the decoding means for each language. Means, and a mixing circuit for mixing and outputting decoded data selected from n decoded data obtained by the n storage means with the decoded main video. Video reproducing apparatus characterized by comprising. 4. A video reproducing apparatus for recording on a recording medium on which a main video, a sub-video synchronized with the main video, and audio information are recorded, wherein a main video readout for reading and decoding encoded data of the main video from the recording medium. Decoding means; sub-picture coded data reading means for reading the coded data of the sub-picture from the recording medium; decoding for decoding the coded data read by the sub-picture coded data reading means to generate decoded data Means, n pieces of storage means for sequentially shifting and storing the decoded data decoded by the decoding means, and decoding the decoded data selected from n pieces of decoded data obtained by the n pieces of storage means. A video reproducing apparatus, comprising: a mixing circuit that mixes and outputs a main video. 5. A video reproducing method for reproducing encoded data of a main video, sub-videos of a plurality of languages synchronized with the main video, and audio data of a plurality of channels, wherein the encoded data of the main video and the sub-language of the plurality of languages are reproduced. Reading the encoded data of the video, decoding the read encoded data of the main video by decoding means, decoding the encoded data of the read sub-video by n decoding means, A decoded data selected from the n pieces of decoded data decoded with the main video decoded and output. 6. A video reproducing method for reproducing a recording signal from a recording medium on which a main video, sub-videos of a plurality of languages synchronized with the main video, and audio encoded data of a plurality of channels are recorded. The encoded data of the main video and the encoded data of the sub-video in the plurality of languages are respectively read, and the encoded data of the read main video are decoded by a decoding unit. Wherein the decoded data selected from the n decoded data decoded by the n decoding means is mixed with the decoded main video and outputted. Method. 7. A video reproducing method for reproducing a recording signal from a recording medium on which a main video, sub-videos of a plurality of languages synchronized with the video, and audio encoded data of a plurality of channels are recorded. The encoded data of the main video and the encoded data of the sub-video in the plurality of languages are respectively read, the encoded data of the main video are decoded by decoding means, and the encoded data of the read sub-video is decoded at a normal decoding processing speed. The decoding data decoded by the decoding means at n times the speed is stored in the n storage means for each language, and the decoded data obtained by the n storage means is stored. Wherein the decoded data selected from the above is mixed with the decoded encoded main video data and output. 8. A video reproducing method for a recording medium on which a main video, a sub video synchronized with the main video, and audio information are recorded, wherein the encoded data of the main video and the sub video are encoded from the recording medium. The data is read out respectively, the encoded data of the main image and the encoded data of the sub-image are respectively decoded by decoding means, and the sub-images decoded by the decoding means are sequentially shifted and stored in n storage means. A video reproducing method, characterized in that decoded data selected from n decoded data obtained by the n storage means is mixed with the decoded main video and outputted.