JP3869619B2 - DVD audio disc still image playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for reproducing still images in a DVD audio disk reproducing apparatus, and in particular, to provide an operator with information on reproducing still images displayed during reproduction of an audio track.
[0002]
[Prior art]
In general, a compact disc (CD) and its playback device are provided as a playback device for audio sound. CDs have been provided as audio-only playback media, replacing conventional analog record boards, and thereafter storing video (moving pictures or still pictures) in the storage area and playing back video CDs together with audio signals.
[0003]
In recent years, a DVD audio standard has been formulated for the above-mentioned CD in order to use a DVD (Digital Versatile Disc) having a further storage capacity as an audio medium. This DVD audio stores multi-channel audio information, which has not been possible with CDs, on a disc, and provides users with high-quality and high-quality audio reproduction.
[0004]
In this DVD audio standard, still image information called audio still video (hereinafter referred to as ASV) can be stored on the disc in addition to the main audio signal, and the ASV is recorded together with the audio in the DVD audio playback device. Can be played.
[0005]
This ASV is designated to play back one or more pieces of still image information within a sound reproduction period, with one sound track as a minimum unit, and display of a plurality of still image information within the sound reproduction period. Is switched and played.
[0006]
This still image switching is performed by the DVD audio playback device based on the still image playback control information stored on the disc.
[0007]
Switching of a plurality of still images allocated within the specific audio playback period is controlled by the DVD audio playback apparatus reading information in the DVD audio format in addition to switching by the operator.
[0008]
[Problems to be solved by the invention]
By the way, in the switching described above, the control information stored on the disc includes one of a reproduction period of a still image to be reproduced or a range of the reproduction period that is minimum and maximum. The DVD audio playback apparatus automatically switches still images during the track playback period based on the playback period included in the control information. Here, when the reproduction period of the still image is represented by the minimum and maximum ranges, an arbitrary period within the minimum and maximum range is selected by the DVD audio reproduction apparatus as the reproduction period of the still image. The still image is automatically switched.
[0009]
In this case, when there are a plurality of still images displayed simultaneously with the reproduced audio sound, the reproduction period of each still image is performed based on the reproduction period information stored on the DVD audio disk, and each still image is actually The time until switching is not included in the stored information of the still image to be played back.
[0010]
Therefore, since the still image stored on the disc does not have information on the reproduction period of the display, the reproduction period is not displayed only by displaying the image read from the disc, and the operator can reproduce the image. I cannot know when the still image is switched.
[0011]
For example, when a still image contains text, the operator becomes crazy about the first sentence and switches to the next still image before reading to the end. There is a problem of giving.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, the DVD audio disk playback apparatus of the present invention stores a plurality of still image information to be played back together with main playback sound, audio sound information, and control information for playing back still image information. A data reading unit for reading stored information of the DVD audio disk, a demultiplexer unit for separating the information read by the data reading unit into audio data, still image information, and control information into individual data streams; The control information includes a decoding unit for decoding the separated audio / sound information and still image information, and a display unit for displaying the decoded still image, and a period for reproducing each still image on the display unit. Each still image whose playback period has been determined becomes the next still image. Ri remaining time until alternatives are those having a control unit for displaying on the display unit together with the still image.
[0013]
Further, in the DVD audio disk reproducing apparatus of the present invention, the control unit displays the number of still images displayed corresponding to the audio sound being reproduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
1. Configuration of DVD Audio Disc Playback Device FIG. 1 shows an example of the configuration of a DVD audio disc playback device according to the present invention.
Reference numeral 1 denotes a DVD audio disk which stores audio information and still image information reproduced by this apparatus. Information stored in the DVD audio disk 1 is read by the optical pickup 2. Servo information for controlling the position of the optical pickup 2 is written on the DVD audio disk 1, the data reading unit 3 sends the read servo information to the control unit 30, and the control unit 30 detects the position of the optical pickup 2. Take control.
[0016]
The still image and audio reproduction data on the DVD audio disk read by the optical pickup 2 are error-corrected by the data decoder unit 4 from the data reading unit 3 and then demultiplexer 6 via the ASVU buffer 5 and the track buffer 7. , 8 is sent.
[0017]
Control information for reproducing the DVD audio disk 1 is sent from the data decoder unit 4 to the control unit 30.
[0018]
The control unit 30 temporarily stores the control information received from the data decoder 4 in the control information memory 34, and plays back the reproduced audio sound (song) based on the operation information of the operator input through the operation input unit 32. The reproduction information of the specified music is generated and stored in the reproduction information memory 36.
The reproduction information includes the specified audio sound, information on a still image displayed during reproduction of the audio sound, and information on a position where the information is recorded on the DVD audio disk 1.
[0019]
Based on the generated reproduction information, the control unit 30 sends a control signal for reproducing the DVD audio disk 1 to the optical pickup 2, instructs the data reading unit 3 to read, and is read from the DVD audio disk 1. Audio audio information and still image information are read out. The read still image information is temporarily stored in the ASVU buffer 5.
[0020]
Audio audio information read from the DVD audio disk 1 is similarly error-corrected by the data decoder 4 and then temporarily stored in the track buffer 7.
[0021]
The still image information stored in the ASVU buffer 5 and the audio / audio information stored in the track buffer 7 are sent to the demultiplexers 6 and 8 based on the reproduction control signal from the control unit 30, respectively. Converted to an audio / audio information stream.
[0022]
The audio / audio information stream converted by the demultiplexer 8 is decoded into a digital audio signal by the audio / audio decoder 12, further converted into an analog signal by the D / A conversion circuit 18, and audio audio is output.
[0023]
Similarly to the above, the still image information stream separated by the demultiplexer 6 is decoded into an image signal by the still image decoding unit 10 and sent to the still image display synthesis unit 14.
The data conversion in the demultiplexers 6 and 8 and the decoding and reproduction by the still image decoding unit 10 and the audio / sound decoding unit 12 are performed in synchronization with the program reproduction by the reproduction control signal sent from the control unit 30.
[0024]
In the reproduction of the still image, the still image display synthesis unit 14 calculates the remaining time of the currently displayed still image in the control unit 30 based on the reproduction period of each still image stored in the reproduction information memory 36. The result is combined with the image information sent from the still image decoding unit 12. The synthesized image is displayed on the display unit 16.
[0025]
2. DVD Audio Format Next, the format of control information stored in the DVD audio disk 1 will be described.
FIG. 2 is a diagram showing the logical structure of DVD audio.
The logical structure of DVD audio is composed of a volume space structure (Volume and File Structure), a DVD audio space (DVD Audio Zone), a DVD video space (DVD Video Zone), and another DVD space (DVD Other Zone).
The DVD audio space consists of one simple audio manager (SAMG), one audio manager (Audio Manager: AMG), one audio still video set (ASVS), and 1 to 99 audio title sets (Audio_Title_Set: ATS). It is configured.
[0026]
The AMG manages the configuration of the DVD audio disk, and includes an AMGI (Audio Manager Information) file including control information and VOB (Video Object) information for the AMG menu, as shown in FIG. It is composed of an AMGM_VOBS (Video Object Set for AMG Menu) file and an AMGI backup file (Backup for AMGI).
[0027]
Each ATS is composed of an ATSI (Audio Title Set Information) file including control information, an AOB title file (AOTT_AOBS), and an ATSI backup file (Backup for ATSI).
[0028]
The configuration of the AOTT_AOBS file is as shown in FIG. 2 (b), and includes an AOB ID number reproduced by each ATS and a cell ID number included in the AOB ID number. Information for playback of each ATS is described in the program chain information table in the ATSI file.
[0029]
FIG. 3 shows the structure of the ATSI.
ATSI is composed of an ATSI management table (ATSI_MAT) and an ATS program chain information table (ATS_PGCIT).
[0030]
The configuration of the ATS_PGCIT is shown in FIG.
ATS_PGCIT is composed of 1 to n (n ≦ 99) ATS_PGCI search pointers (ATS_PGCI_SRP # 1 to n) describing the information, and ATS program chain information (ATS_PGCI) corresponding to each search pointer. ing.
As shown in FIG. 5, this ATS_PGCI includes ATS_PGC general information (ATS_PGC_GI), an ATS program information table (ATS_PGIT), an ATS cell playback information table (ATS_C_PBIT), and an ATS still image playback information table (ATS_ASV_PBIT).
[0031]
FIG. 8 shows the contents of ATS_ASV_PBIT. This table includes search pointer information (ATS_ASV_PBI_SRP # 1 to #m) of ASV playback information that is played back according to each program included in the ATS, and playback information (ATS_ASV_PBI # 1 to #n) specified by each ATS_ASV_PBI_SRP. ). Here, the relationship between n and m is n ≦ m ≦ 99. That is, one ATS_ASV_PBI can be specified from a plurality of search pointer information (ATS_ASV_PBI_SRP).
[0032]
FIG. 9 is a diagram illustrating a configuration of ATS_ASV_PBI_SRP. Each ATS_ASV_PBI_SRP is composed of an ASV unit number (ASVU), ASV_DMD that defines the display mode of ASV, start address information (ATS_ASV_PBI_SA) and end address information (ATS_ASV_PBI_EA) of ASV reproduction information reproduced in each ATS.
[0033]
ATS_ASV_PBI is also called D_List and stores ASV playback information corresponding to the display mode defined by ASV_DMD. The contents of this D_List differ in the following ASV playback modes. FIG. 10 shows the contents of D_List corresponding to the following modes.
[0034]
In ASV playback, two types of slide shows and three types of browserable pictures are defined as types of playback based on management information stored in the disc.
Here, a slide show is used when ASV display timing and AOB playback are synchronized, and in other cases, a browsable picture is used.
ASV display in the slide show is controlled by a display period stored on the disc, and is displayed at a specific timing during the AOBS playback period. There are two types of slide shows due to the difference in the display order of the ASV.
[0035]
The first slide show is called a sequential slide show as shown in FIG. 61 1). The ASV is displayed in the display order and display period (described in ATS_PGCI) stored on the disc. Playback is displayed.
[0036]
FIG. 10A shows the contents of D_List in the sequential slide show. One ASV number (1 byte), hold (1 byte), FOSL_BTNN (1 byte) in the ASV collection (ASVU) played back by this program, consisting of 10 bytes in size, start displaying this ASV Program number (1 byte) played back at the time, display start timing (4 bytes) (This timing is a set of ASV played back in each program. The playback start timing of the first ASV is set to 0, and the next This includes various information on the effect mode at the start of playback and its duration (1 byte), the effect mode at the end of playback and its duration (1 byte).
[0037]
The second slide show is called a random / shuffle slide show as shown in FIG. 62), and the ASV is played back during the display period stored on the disc in the order arbitrarily set by the playback device. Is done.
[0038]
FIG. 10B shows the contents of D_List in the random / shuffle slide show. The contents are the same as in FIG. 10A except that the ASV number is reserved. (Because the order of ASV to be played is arbitrarily selected from ASVU).
In the above slide show, the user cannot change the display timing from the playback device.
[0039]
FIG. 7 schematically shows the three types of browseable pictures.
FIG. 7 1) is a sequential browsable picture, and the display order of ASV is the order stored on the disk. The display period of each ASV is the period stored on the disc, or if the maximum value and minimum value of the display period are stored for each ASV, the playback device can arbitrarily set between the maximum value and the minimum value. It will be one of the selected periods. Note that the right side of the figure shows ASV transitions when ASV switching is performed by a user operation during the display period of each ASV. Here, prev. Indicates that the operation input unit 32 has performed an operation to return to the previously played ASV during playback of a certain ASV, and next refers to the next playback during a certain ASV playback. This shows that the operation input unit 32 has performed an operation to reproduce the ASV that is being played. The home selection is an operation input for selecting one ASV (in this case, ASV # 2) as a reference set by the control unit 30 according to the recorded contents of the disc in a series of ASVs to be reproduced. This represents what has been performed by the unit 32.
[0040]
FIG. 10C shows the contents of D_List in this sequential browserable picture.
ASV number (1 byte), hold (1 byte), FOSL_BTNN (1 byte), Home D_List number (1 byte), maximum duration (2 bytes), minimum duration (2 bytes), effect mode at the start of playback and its duration (1 byte), the effect mode at the end of playback, and various information of the period (1 byte). Here, when the values of the maximum period and the minimum period are the same, one playback period is given to this ASV, and when there is a difference, an arbitrary value can be set between the maximum period and the minimum period. Is set by the playback apparatus.
[0041]
FIG. 7 2) represents a random / shuffled browsable picture. The display order of each ASV is arbitrarily selected by the playback device. The display period of each ASV is the period stored on the disc, or if the maximum value and minimum value of the display period are stored for each ASV, the playback device can arbitrarily set between the maximum value and the minimum value. It will be one of the selected periods. Note that the right side of the figure shows ASV transitions when ASV switching is performed by a user operation during the display period of each ASV.
[0042]
FIG. 10D shows the contents of D_List in this random / shuffled browserable picture.
10C is the same as FIG. 10C except that the ASV number defined in FIG. 10C is reserved. (Because the order of ASV to be played is arbitrarily selected from ASVU).
[0043]
FIG. 73) represents a sequential browseable picture that does not involve automatic transition (the display period is infinite). The display order of each ASV is the order stored on the disc. However, since each ASV has no specified playback period, each ASV is switched only by a user operation.
[0044]
In the case of a sequential browseable picture not accompanied by this automatic transition, the contents of D_List have the same structure as in FIG. 10C, but the values of the maximum period and the minimum period are 0000h.
[0045]
Actual reproduction of the audio disc is performed by reading each AOB from the disc and decoding and reproducing it based on the program information described in the ATS_PGCI.
When still image information is assigned to each AOB (when still image information to be reproduced is described in ATS_ASV_PBIT in the ATS_PGCI), the playback device extracts still image information from the disc based on ATS_ASV_PBIT and related information. Reading, decoding and reproducing and displaying on the display device.
The present invention is characterized in that the playback display period of each ASV played back in each of the above presentations is displayed.
[0046]
3. Regarding the operation of the present invention, the reproducing apparatus reads data from the disk 1 with the optical pickup 2, and among the read data, control information relating to reproduction of the DVD audio disk 1 is sent from the data decoder 4 to the control unit 30, After being converted into a prescribed format, it is temporarily stored in the control information memory 34.
[0047]
The control unit 30 reads the control information temporarily stored in the control information memory 34 in response to a user operation on the operation input unit 32, confirms a program (ATS_PGCI) for reproducing audio information, and reproduces information for one track. Is stored in the reproduction information memory 36, and audio / audio information (AOB) and still image information (ASV) are specified when reproduction of a still image is designated based on the reproduction information stored in the reproduction information memory 36. The optical pickup 2 reads out from the disk 1 and stores the still image information in the ASVU buffer 5 and the audio / sound information in the track buffer 7 via the data decoder 4.
[0048]
Based on the control signal from the control unit 30, still image information stored in the ASVU buffer 5 is sent to the demultiplexer 6, converted into a still image data stream, and similarly, audio / audio information stored in the track buffer 7. Is sent to the demultiplexer 8 and converted into an audio data stream.
[0049]
The generated audio data stream is decoded into audio information by the audio audio decoding unit 12 in accordance with an instruction from the control unit 30 based on the control information from the reproduction information memory 36, and after analog conversion by the D / A conversion circuit 18, Output as audio sound.
[0050]
Similarly, the still image data stream is decoded into still image information by the still image decoding unit 10 according to an instruction from the control unit 30 based on the control information from the reproduction information memory 36, and the decoded still image information is displayed as a still image display. It is sent to the synthesis unit 14. The control unit 30 calculates the remaining display time based on the still image display period stored in the reproduction information memory 36 and the elapsed time from the start of display of the still image, and the calculated remaining time is calculated as the still image display combining unit 14. To send.
[0051]
The still image display combining unit 14 combines the still image information transmitted from the still image decoding unit 10 and the remaining time information transmitted from the control unit 30 and displays them on the display unit 16.
[0052]
This remaining time is determined by checking the ASV that is scheduled to be played and the display mode of that ASV from the search pointer (ATS_ASV_PBI_SRP) for playing a still image specified in the audio title (ATS) that the user has specified to play. It can be easily calculated from the contents of the D_List.
[0053]
In other words, once the audio title (ATS) to be played is determined, the information on the ASV played on the ATS from the ATS program information (ATSI_PGCI) (the number of ASV played, the ASV display mode, and the playback of each ASV) The timing or reproduction period) is determined by the following procedure and stored in the reproduction information memory 36.
[0054]
(1) In the case of a slide show When an ASV is displayed in either a sequential slide show or a random / shuffle slide show, the display timing of each ASV is uniquely determined by D_List as shown in FIG. 30 reads the display timing of the ASV to be reproduced from the D_List stored in the control information memory 34 and stores it in the reproduction information memory 36.
The control unit 30 calculates the remaining time by calculating the difference between the cumulative playback period of the ASV from the playback start timing of the first ASV to the present time and the playback timing of the next ASV, and via the still image display synthesis unit 14, The display unit 16 displays the remaining reproduction time together with the still image.
[0055]
(2) For browserable pictures In the case of sequential browserable pictures with automatic transition or random / shuffled browserable pictures, the playback period stored on the disc 1 of each ASV to be played is the maximum period and the minimum period. In the case of two values, the control unit 30 arbitrarily sets the reproduction period of each ASV as a period between the permitted maximum period and the minimum period, and stores the set period in the reproduction information memory 36.
[0056]
The control unit 30 calculates the remaining reproduction time by obtaining the difference between the reproduction period of each ASV stored in the reproduction information memory 36 and the elapsed reproduction time, sends it to the still image display synthesis unit 14, and sends it to the display unit 16. The remaining time is displayed together with the still image.
[0057]
In the above case, the control unit 30 of the playback device arbitrarily sets the playback period of each ASV. However, the user can determine this period setting between the maximum period and the minimum period.
[0058]
In both cases of (1) slide show and (2) browserable picture, the control unit 30 determines how many ASVs are reproduced in the ATS stored in the reproduction information memory 36 and how many ASVs have been displayed. It is also possible to send information for displaying on the display unit 16 whether the reproduction of the ASV is left on the display unit 16 and display it.
[0059]
The control information memory 34 preferably stores the control information (AMGI and ATSI) stored in the disk 1 when the disk 1 is loaded into the playback device.
The playback device can easily select audio information that the user desires to play by causing the display unit 16 to display the control information stored in the control information memory 34.
[0060]
【The invention's effect】
As described above, according to the present invention, the remaining playback time of each ASV that is played back by the ATS program is displayed on the display unit 16, so that the time until the next ASV is switched is displayed. Compared to the case where there is no time display, the user can confirm the information of the ASV according to the time until switching of the ASV being reproduced.
[0061]
Further, the present invention displays the total number of ASVs played back by the ATS that is playing back the audio sound from the information stored in the playback information memory 36 and the number of played back ASVs. ATS will be able to know the total number of unplayed ASV.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a DVD audio playback apparatus according to the present invention.
FIG. 2 is a diagram for explaining a DVD audio logical block structure. FIG. 3 is a diagram for explaining an ATSI file structure. FIG. 4 is a diagram for explaining a structure of ATSI_PGCIT. FIG. 5 is a diagram for explaining a structure of ATS_PGCI. FIG. 7 illustrates an AVS slide show. FIG. 8 illustrates an ATS_ASV_PBIT structure. FIG. 9 illustrates an ATS_ASB_PBI_SRP structure. FIG. 10 illustrates a D_List structure. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 DVD disc 2 Optical pick-up 3 Data reading part 4 Data decoder 5 ASVU buffer 7 Track buffer 6, 8 Demultiplexer 10 Still picture decoding part 12 Audio sound decoding part 14 Still picture display composition part 16 Display part 18 D / A conversion circuit 30 Control unit 32 Operation input unit 34 Control information memory 36 Reproduction information memory

Claims (1)

A data reading unit for reading information from a DVD audio disk in which audio / sound information, at least one still image information reproduced together with the sound information, audio / sound information, and control information for reproducing still image information are stored on the disc When,
A demultiplexer unit that separates information read by the data reading unit into audio data, still image information, and control information into individual data streams;
A decoding unit for decoding the separated audio / voice information and still image information;
A display unit for displaying the decoded still image;
The period for reproducing at least one still image on the display unit is determined from the reproduction period information of the still image stored in the control information, and the remaining time until each determined still image is switched to the next still image is determined. A control unit that displays on the display unit together with the still image,
The control unit has a reproduction period stored in the disc of the audio sound to be reproduced and a still image reproduced in accordance with the audio sound having a maximum period and a minimum period. 2 If there are two values, the list of the still images and the maximum period and the minimum period 2 A DVD audio disc reproducing apparatus, wherein one value is displayed on the display unit, and an operator can set a reproduction period of the still image between the two values of the maximum period and the minimum period.

Images