JP2004334964A - Recording medium, reproducing method, reproducing device, recording method, and recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproducing technology for sound data which does not depend on a reproduced state of a still picture and has the degree of freedom when still pictures are displayed continuously. <P>SOLUTION: When a video information file and a sound information file are recorded on a recording medium on which information is recorded in a file form, sound selecting information is recorded which indicates the relation between the video information file and the sound information file which is selectable when reproducing the video information file. When the video information file is reproduced from this recording medium, the sound information file included the sound selecting information is reproduced together with the video information file. Music is reproduced as BGM in application indicating a still picture continuously, at this time, reproduction of the music is performed independently from the selected still picture. That is, even when a user switches indication of the still picture, reproduction of the music can be performed continuously. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reproduction technique for reproducing an image and a sound recorded on a recording medium, and more particularly to a recording medium, a reproduction technique, and a recording technique for simultaneously reproducing a still image and a sound.
[0002]
[Prior art]
DVD players for reproducing video and audio recorded on an optical disk called a DVD (Digital Versatile Disc) are widely used. In addition to moving images, DVDs can record and reproduce still images and audio.
[0003]
For example, Patent Document 1 discloses a playback device that plays back audio and video in association with each other.
[0004]
[Patent Document 1]
JP 2000-333126A
[0005]
[Problems to be solved by the invention]
In the above-described reproducing apparatus, a still image is associated with each piece of audio data, and the still image is automatically displayed like a picture-story show with the reproduction of the audio. If the user stops displaying a specific still image, the sound will also stop. In addition, when an operation such as returning to the previous still image or skipping to the next still image is performed, the sound is also operated at the same time, so that continuous reproduction cannot be performed. In other words, music can be reproduced only in a form depending on the reproduction state of the still image.
[0006]
However, when considering music reproduction on an application that continuously displays still images, such as a slide photograph, there is a demand to reproduce music as BGM (Back Ground Music). In this case, the reproduction of the music must be performed independently of the still image to be displayed. That is, even when the user switches the display of the still image or pauses and continues to display the specific still image, the music needs to be continuously played.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a technique for reproducing audio data having a degree of freedom which does not depend on the reproduction state of a still image when a still image is continuously displayed.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, an area for storing a video information file, an area for storing an audio information file, the video information file and the video An area is provided for storing audio selection information indicating a relation with an audio information file that can be selected at the time of reproducing the information file.
[0009]
When reproducing the video information file recorded on the recording medium, the audio selection information is reproduced from the recording medium, and the audio information file recorded on the recording medium is reproduced based on the audio selection information. I decided to.
[0010]
Furthermore, when recording the video information file and the audio information file, audio selection information indicating the relationship between the video information file and the audio information file that can be selected when reproducing the video information file is recorded.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the contents of each drawing will be described.
FIG. 1 is a block diagram of a reproducing apparatus according to an embodiment to which the present invention is applied.
In FIG. 1, 101 is an optical disk, 102 is an optical pickup, 103 is a reproduction signal processing circuit, 104 is an output control circuit, 105 is a servo circuit, 106 is a drive control circuit, 107 is an audio decoder, 108 is an audio output terminal, and 109 is an audio output terminal. A video decoder, 110 is a video output terminal, 111 is a system control circuit composed of a CPU or MPU, and 112 is a remote control receiving circuit. The operation of each block will be described later.
[0012]
FIG. 2 is a diagram showing a file configuration on an optical disc used in the reproducing apparatus shown in FIG.
In FIG. 2, 201 is menu information, 202 is a playlist table, 203 is a playlist file, and 204 is a stream file.
[0013]
Data recorded on the optical disc 101 as a recording medium is recorded in a file format, and a file identifier (file name) is added to each file. In the file management information area of the optical disc 101, information such as a file identifier, a file size, a file recording area, and a file recording time of each recorded file is recorded as file management information. When reading a file, the file management information is read from the file management information area, and by referring to the file management information corresponding to the required file identifier, the recording area on the optical disc can be determined, and the file can be read. it can.
[0014]
Here, the stream file 204 is a file in which video information and audio information are recorded. Here, the video information is data that has been subjected to image compression processing such as the MPEG2 method. The audio information is data that has been subjected to audio compression processing such as the MPEG1 method or data recorded in a linear PCM (Pulse Coded Modulation) format. Each data may be converted into, for example, an MPEG transport stream (TS) having a predetermined length and recorded in a file format.
[0015]
In the stream in the stream file 204, both the video information packet and the audio information packet may be recorded, or only one information packet may be recorded. Further, one or more pieces of still image information may be recorded as the video information packet.
[0016]
Information on these file configurations is recorded in a file management information recording area on the optical disc 101.
[0017]
FIG. 3 is a diagram showing the structure of the playlist table.
In FIG. 3, reference numeral 301 denotes a data ID, 302 denotes the number of playlists, and 303 denotes playlist information.
The playlist table lists playlists recorded on the recording medium.
At the head of the playlist table, a data ID 301 indicating that this data is a playlist table is written. For example, it may be character string data such as “PL-TABLE”.
The playlist number 302 indicates the number of pieces of playlist information recorded in the playlist table.
The playlist information 303 indicates an identifier of a file in which an actual playlist is recorded. Specifically, it is a character string such as “0001.PLS”.
By using the number of playlists and the playlist information, file information of all the playlists recorded on the recording medium can be obtained.
[0018]
FIG. 4 is a diagram showing the structure of a playlist.
4, reference numeral 401 denotes a data ID, 402 denotes the number of main streams, 403 denotes the number of selected streams, 404 denotes main stream information, 405 denotes file identifier information, 406 denotes a reproduction start packet number, 407 denotes a reproduction end packet number, and 408 denotes an addition. Information 409 is selected stream information.
[0019]
At the head of the playlist, a data ID 401 indicating that this data is a playlist table is written. For example, it may be character string data such as "PLAYLIST".
The number of main streams 402 indicates the number of main streams included in the playlist.
Similarly, the number of selected streams 403 indicates the number of selected streams included in the playlist.
[0020]
Each stream information 404 includes file identifier information 405, reproduction start packet number 406, reproduction end packet number 407, and additional information 408. Here, the file identifier information 405 is a file identifier of a file recording the stream. The reproduction start packet number 406 indicates the number of a packet to start reproduction in each file when reproducing a stream. The reproduction end packet number 407 indicates the last packet number for reproducing each file. The additional information 408 is an area for recording a flag for identifying a data type included in the main stream or the selected stream, a name of the main stream, or thumbnail information if still image data is used.
[0021]
When a play list is selected and a reproducing operation is performed, data of each main stream 404 included in the play list is continuously reproduced. Specifically, a file corresponding to the file identifier 405 included in each main stream information is read, and packets from the reproduction start packet number 406 to the reproduction end packet number 407 of the stream included in this file are reproduced and decoded. By doing so, the data is reproduced.
[0022]
Although a plurality of main stream information 404 are described in the drawing, one may be of course.
[0023]
On the other hand, the selected stream 409 indicates a stream that can be reproduced by a user's selection while reproducing the main stream.
In the drawing, a plurality of selected streams 409 are described. However, one stream may be used, or when there is no stream that allows the user to make a selection, there may be no selected stream. In this case, if the number of selected streams is set to 0, no contradiction occurs. It may be one.
[0024]
FIG. 5 is a diagram illustrating a recording format of the MPEG stream according to the present embodiment.
The MPEG transport stream is a set of packets 501 having a length of 188 bytes. Each packet is recorded with a 4-byte packet header 502 added thereto. In this packet header 502, a 30-bit time stamp 503 indicating the transmission time of the packet and an AUX 504 as 2-bit additional information are recorded. Here, the time stamp is time information counted at 27 MHz, and is used for controlling the transmission timing of a packet during reproduction. The 2-bit additional information can be used to record, for example, copyright management information.
[0025]
Hereinafter, the reproducing operation of the reproducing apparatus will be described with reference to the drawings.
When the optical disc 101 as a recording medium is inserted, the system control unit 111 reads out file management information from a file management information area on the optical disc. Specifically, the system control unit 111 instructs the drive control unit 106 to read data from the file management information area. The drive control unit 106 controls the servo 105 and controls the rotation speed of the optical disc 101 and the position of the optical pickup 102 in order to read data in a designated area. A reproduction signal read from a predetermined position on the optical disk 101 by the optical pickup 102 is subjected to predetermined demodulation processing, error correction processing, and the like by the reproduction signal processing circuit 103. The digital data including the file management information reproduced by this process is supplied to the system control unit 111 via the drive control unit 106.
The file management information includes detailed information such as an identifier of a file recorded on the optical disc 101, a recording position, and a recording time.
[0026]
The system control unit 111 reads a playlist table as shown in FIG. 3 using the reproduced file management information. In the playlist table, the number of playlists 302 and the file identifier (file name) 303 of each playlist are recorded. The system control unit 111 displays the playlist in the playlist table on a monitor screen.
[0027]
The user selects a desired file from the playlist displayed on the monitor screen. When selecting a playlist, an “arrow button”, an “enter button”, or the like provided on a remote controller (not shown) is used.
[0028]
The user's remote control operation is transmitted from the remote control receiving unit 112 to the system control unit 111 and immediately reflected on the monitor screen. When the user selects a playlist to be reproduced, the system control unit 111 starts reproduction of video / audio corresponding to the selected playlist. Here, the main stream information 404 and the selected stream information 409 are recorded in the playlist as shown in FIG.
[0029]
The system control unit 111 reads the stream file on the optical disc using the file identifier information 405 included in the main stream information 404, and converts the stream file into digital data by the reproduction signal processing circuit 103. The reproduced digital data is in the data format shown in FIG. The reproduction signal processing circuit 103 supplies packet data to be reproduced to the output control unit 104 according to the reproduction start packet number and the reproduction end packet number input from the system control unit 111.
[0030]
The output control unit 104 controls the output timing of each packet using a packet header in the input digital data. In addition, each packet is identified as a video packet or an audio packet using the packet ID in the MPEG packet, and each packet is assigned to a video decoder or an audio decoder according to the identification result.
[0031]
The video data packet input to the video decoder 109 is decoded into a video signal by the video decoder. The decoded video signal is displayed on an external monitor screen via the video signal output terminal 110.
[0032]
Similarly, the audio data packet input to the audio decoder 107 is decoded into an audio signal by the audio decoder. The decoded audio signal is output from an external speaker or the like via the audio output terminal 108.
[0033]
Here, when there is a selectable stream in the playlist, the system control unit 111 displays on the monitor that the user has a selectable stream. Specifically, the stream name and the thumbnail information in the additional information of each selected stream are displayed to urge the user to select the selected stream.
[0034]
The user selects a desired selected stream from the displayed name and thumbnail information of the selected stream. Here, only one selected stream may be selected, or a plurality of selected streams may be selected. Also, a configuration may be adopted in which reproduction conditions such as whether to reproduce the selected stream repeatedly or only once are selected.
[0035]
When the selected stream is selected by the user, the system control unit 111 reproduces the selected stream in parallel with the reproduction of the main stream. At this time, if the selected stream is an audio stream, an instruction is given to the output control unit 104 so that audio information included in the main stream is not reproduced. This is for giving priority to the reproduction of the selected stream.
[0036]
When the selected stream selected by the user is an audio stream, the system control unit 111 reads a file corresponding to the selected stream from the optical disc 101 and controls the output control unit 104 so that data is supplied to the audio decoder 107. I do. At this time, since the main stream must be reproduced in parallel, the output of the main stream and the read of the selected stream are alternately performed, and the output destination is switched by the output control unit 104. And video output can be performed simultaneously.
[0037]
The reproduction of the selected stream is controlled so as to sequentially reproduce the selected stream selected by the user. The reproduction of the selected stream is performed independently of the reproduction of the main stream.
[0038]
Here, when the user performs an operation such as pause, fast-forward, or skip on the main stream, the output data of the stream reproduced as the main stream changes according to the user's operation. The main stream data is input to the video decoder 109, and the video according to the user operation is decoded by the video decoder and displayed on the monitor screen. For example, when the user presses the skip button, the system control unit 111 performs control so that reproduction of a stream corresponding to the next main stream information in the playlist is started.
[0039]
At this time, since the reproduction of the selected stream is performed independently of the reproduction of the main stream, the audio in the selected stream is continuously output regardless of the operation of the user. The selection of the audio is performed by a selected stream operation.
[0040]
Therefore, even when operations such as pause, fast forward, and skip are performed on the video of the main stream in the playlist, the audio in the selected stream can be continuously played back, thereby preventing the audio from being interrupted.
[0041]
When still image information is recorded as the main stream video, the user can select an arbitrary screen like a slide picture, and at that time, the sound is continuously reproduced like BGM.
[0042]
In the above specific example, the user is prompted to select the selected stream at the start of the reproduction of the playlist. However, the present invention is not limited to this. For example, a menu for selecting the selected stream by a remote control operation by the user is displayed. However, there is no problem even if the selection is made at any place during the main stream reproduction.
[0043]
In the above specific example, an optical disk is used as a recording medium, but this is not a limitation, and any recording medium that can be randomly accessed using a hard disk device, a semiconductor memory, or the like can be used.
[0044]
The present invention is possible regardless of the hardware configuration, the file system, and the data structure by providing a stream that can be selected by the user in addition to the main stream and controlling the stream to be reproduced in parallel with the main stream. .
[0045]
【The invention's effect】
According to the present invention, during reproduction of video information, any audio information can be reproduced independently of the video information. Therefore, when the displayed video is stopped, returned, or advanced, However, the sound is reproduced continuously. Therefore, even when the slide display of the still image is performed, the music as the BGM is continuously reproduced without interruption.
[Brief description of the drawings]
FIG. 1 is a block diagram of a reproducing apparatus according to an embodiment to which the present invention is applied.
FIG. 2 is a diagram showing a file configuration on an optical disc used in the reproducing apparatus shown in FIG. 1;
FIG. 3 is a diagram showing a structure of a playlist table.
FIG. 4 is a diagram showing a structure of a playlist.
FIG. 5 is a diagram illustrating a recording format of an MPEG stream according to the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 ... Optical disk, 102 ... Optical pickup, 103 ... Reproduction signal processing circuit, 104 ... Output control part, 107 ... Audio decoder, 109 ... Video decoder, 111 ... System control part, 404 ... Main stream information, 405 ... File identifier information, 406: reproduction start packet number, 407: reproduction end packet number, 408: additional information, 409: selected stream information.

Claims (9)

A recording medium for recording information in a file format,
An area where the video information file is stored,
An area where the audio information file is stored;
A recording medium, comprising: an area for storing audio selection information indicating a relationship between the video information file and an audio information file selectable when reproducing the video information file. A reproducing method for reproducing information recorded on a recording medium,
When playing back the video information file recorded on the recording medium, audio selection information indicating the relationship between the video information file and the audio information file recorded on the recording medium selectable at the time of reproducing the video information file, A reproducing method comprising: reproducing from the recording medium; and reproducing an audio information file recorded on the recording medium based on the audio selection information. 3. The reproducing method according to claim 2, wherein
A reproduction method characterized by controlling so that an arbitrary audio information file can be selected from audio information files included in the audio selection information. 4. The reproduction method according to claim 3, wherein
A reproducing method, wherein the selected audio information file is repeatedly reproduced during reproduction of the video information file. A reproducing apparatus for reproducing information recorded on a recording medium,
When playing back the video information file recorded on the recording medium, audio selection information indicating the relationship between the video information file and the audio information file recorded on the recording medium selectable at the time of reproducing the video information file, A reproducing method comprising: means for reproducing from the recording medium and reproducing an audio information file recorded on the recording medium based on the audio selection information. The playback device according to claim 5, wherein
A reproducing apparatus, comprising: means for selecting an arbitrary audio information file from audio information files included in the audio selection information. The playback device according to claim 6, wherein
A reproducing apparatus, wherein during reproduction of the video information file, an audio information file selected by a user is repeatedly reproduced. A recording device that records information in a file format on a recording medium,
When recording the video information file and the audio information file, the recording apparatus includes means for recording audio selection information indicating a relationship between the video information file and the audio information file that can be selected when the video information file is reproduced. Characteristic recording device. A recording method for recording information in a file format on a recording medium,
Recording a video information file and an audio information file, recording audio selection information indicating an association between the video information file and the audio information file selectable when reproducing the video information file; .

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