JP2004213729A - Dvd player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a DVD player capable of searching a specified playing position without using TMU, and eliminating a shift from the specified playing position. <P>SOLUTION: When a point setting key for setting an A or B point is depressed during playing, data necessary for playing is stored together with the address of NV<SB>-</SB>PCK being reproduced. If the title under reproduction is finished before the setting of the B point after the setting of the A point, the address of the last NV<SB>-</SB>PCK of the title is stored as the B point. When a plurality of groups of A and B points are set and an A-B repeat execution key is depressed, the addresses of the NV<SB>-</SB>PCK of the stored A and B points are read. The stored data are read, and A-B repeating is executed in setting order. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a DVD playback device having an AB repeat function or a marker search function.
[0002]
[Prior art]
In recent years, DVDs (Digital Versatile Discs) have been standardized and are becoming popular. The DVD playback device has various playback functions. Among these functions, the A and B repeat functions for determining points A and B by pressing a predetermined key during playback and repeating playback between A and B, and the marker by pressing a predetermined key during playback. There is a marker search function that allows you to set a point and play from the marker position at any time during playback.
[0003]
As in the above two functions, when reproducing from a designated position, the reproducing position is stored and searched using a TMU (time map unit: second). TMU is an approximate time interval of MAP_ENT (map entry), and is set arbitrarily for each disc (normally, 1 ≦ TMU ≦ 4). MAP_ENT is a number recorded at regular intervals.
[0004]
For example, when the point A (or the point B or the marker point) is set, the time information of the point A (or the point B or the marker point) is stored. When searching for the set point, the head address of the VOBU (video object unit) is obtained from MAP_ENT_Ns (map entry number) calculated by dividing the time of point A (or point B or marker point) by TMU. And start playback.
[0005]
The information reproducing apparatus disclosed in Patent Document 1 has two decoders. Playback is performed while being processed by the decoder 1. When a repeat start position (point A) is designated, the GOP currently being processed is read from the disk drive and stored in the stream buffer. The data is supplied from the head of the GOP to the paused decoder 2, decoded to the repeat start position, and temporarily stopped. When the execution of the repeat reproduction is instructed, the output is switched to the decoder 2 side, the processing from the start position by the decoder 2 is started, and the repeat reproduction is executed instantaneously. Similarly, the decoder 1 is supplied with data from the beginning of the GOP, performs decoding to the start position, and temporarily stops. When the repeat reproduction is instructed, the output is switched again from the decoder 1 side.
[0006]
In the digital information recording / reproducing system disclosed in Patent Document 2, the points A and B set by the AB repeat key are set at the beginning of the corresponding image data (GOP (group of picture)) immediately after the setting. It points to an address.
[0007]
Further, in the disk reproducing apparatus and the reproduction control method disclosed in Patent Document 3, an address on the disk of data (VOBU) to be read is set according to reproduction management information such as NV_PCK (navigation pack). Further, the reading means searches the address set by the setting means, and reads the target data from the disk by the obtained reproduction signal.
[0008]
[Patent Document 1]
JP 2001-203977 A [Patent Document 2]
JP 2002-176625 A [Patent Document 3]
Japanese Patent Application Laid-Open No. 2002-222584
[Problems to be solved by the invention]
However, when performing AB repeat, marker search, or the like using the TMU, the search cannot be performed unless the TMU is described on the disc. In addition, as the value of TMU increases and the interval of MAP_ENT increases, the deviation from the playback position specified by the user also increases.
[0010]
Further, in Patent Literature 1 and Patent Literature 2, a GOP is stored and reproduced. However, if a GOP is damaged, it cannot be used. Further, the reproduction method of Patent Document 3 is a method generally used in normal reproduction.
[0011]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a DVD reproducing apparatus which enables a specified reproduction position to be searched without using a TMU and eliminates deviation from the specified reproduction position.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in a DVD reproducing apparatus having an AB repeat function for repeatedly reproducing between two set points, a point setting key for setting an A point or a B point during reproduction is depressed. Then, the address of the NV_PCK being reproduced is stored, and when the AB repeat execution key is pressed, the stored addresses of the NV_PCK at the points A and B are read out and reproduced from the points A to B. It is characterized by the following.
[0013]
As described above, by using the address of the NV_PCK as the information of the playback position of the AB repeat, the designated playback position can be searched without using the TMU, and the deviation from the designated playback position can be eliminated. it can. Therefore, the user can perform each setting operation in the same manner as in the related art, and is a DVD playback device that can be reproduced accurately from a desired scene and that is comfortable and easy to use.
[0014]
In the above-described DVD reproducing apparatus, data necessary for reproduction may be stored together with the address of the NV_PCK being reproduced, and the stored data may be read out together with the reading of the stored NV_PCK address.
[0015]
For example, when an angle, subtitle designation (language designation), and audio type are stored as data necessary for reproduction, those conditions can be reproduced at the time of AB repeat. Therefore, the AB repeat can reproduce not only that section but also other reproduction conditions at the time of setting the point A.
[0016]
Also, in the above-mentioned DVD reproducing apparatus, if the title being reproduced ends after the point A is set and before the point B is set, the address of the last NV_PCK of the title is stored as the point B. You may. Thus, AB repeat across titles can be prohibited.
[0017]
Further, in the above-described DVD reproducing apparatus, a plurality of sets of points A and B may be set, and when the AB repeat execution key is pressed, AB repeat may be performed in the set order.
[0018]
As a result, a plurality of AB repeat sections can be connected and reproduced sequentially. Therefore, it is possible to collect desired scenes and create a highlight or the like of the title.
[0019]
Further, according to the present invention, in a DVD reproducing apparatus having a marker search function for reproducing from a set marker point, when a marker setting key for setting a marker point is pressed during reproduction, the address of the NV_PCK being reproduced is stored. When the marker search execution key is pressed, the NV_PCK address of the stored marker point is read and reproduced.
[0020]
As described above, by using the address of NV_PCK as the information of the reproduction position of the marker search, the specified reproduction position can be searched without using the TMU, and the deviation from the specified reproduction position can be eliminated. Therefore, the user can perform the setting operation in the same manner as in the related art, and is a DVD playback device that is reproduced accurately from a desired scene and is comfortable and easy to use.
[0021]
In the above-described DVD reproducing apparatus, data necessary for reproduction may be stored together with the address of the NV_PCK being reproduced, and the stored data may be read out together with the reading of the stored NV_PCK address.
[0022]
For example, when an angle, subtitle designation (language designation), and audio type are stored as data necessary for reproduction, those conditions can be reproduced at the time of marker search. Therefore, the marker search can be reproduced not only from the designated position but also to other reproduction conditions at the time of setting the marker point.
[0023]
Further, in the above-described DVD reproducing apparatus, when a plurality of marker points are set and the marker search execution key is pressed, any one of the markers may be searched.
[0024]
For example, when a marker search execution key is pressed, a list of markers is displayed, and if any marker point can be selected from the list, reproduction can be performed from a desired marker point.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a diagram illustrating a hierarchical structure of information recorded on a DVD. The data recording area formed on the DVD has a structure as shown in FIG. The logical format of this structure is determined based on, for example, one of the standards ISO 9660 and Universal Disk Format (UDF) Bridge.
[0026]
The data recording area between the lead-in area and the lead-out area is allocated as a volume space. The volume space includes a space for volume and file structure information (volume / file structure), a space for DVD standard applications (DVD video area), and a space for non-applications of this standard (other recordings). Area).
[0027]
The volume space is physically divided into a number of sectors, and these physical sectors are numbered sequentially. The logical address of the data recorded in this volume space means a logical sector number as defined by ISO9660 and the UDF bridge.
[0028]
The volume / file structure area corresponds to a management area defined in ISO9660 and the UFD bridge. Based on the description of this area, the contents of a VMG (video manager) are stored in a system microcomputer inside the DVD playback device described later. The VMG describes information for managing a VTS (video title set).
[0029]
The VTS includes VTSI (video title set information), VTSM_VOBS (video title set menu video object set), VTSTT_VOBS (video title set title video object set), and VTSI_BUP (video title set information backup).
[0030]
VTSTT_VOBS describes the ID number of a Cell (cell) included in each VOB (video object). In the VTSI, PGCI (program chain information) is recorded.
[0031]
In the other recording area, information usable in the above-described VTS or other information unrelated to the VTS can be recorded. This area is not essential.
[0032]
FIG. 2 is a diagram illustrating the configuration of the PGCI. The PGCI is composed of a plurality of PGCs (program chains), and each PGC records the number of a Cell constituting the PGC. In the PGCI, time information of PGC_PB_TM (program chain playback time) and C_PBTM (cell playback time) is recorded by a time code. PGC_PB_TM is a time code representing the total playback time required to reproduce a series of cells contained in the PGC, and C_PBTM is a time code representing the playback time of each cell contained in the PGC. is there.
[0033]
FIG. 3 is a diagram illustrating a hierarchical structure of information included in VTSTT_VOBS. A VOBS (video object set) is composed of a plurality (i in FIG. 3) of VOBs. The VOB is composed of a plurality of (j in FIG. 3) Cells. Note that VOB_IDNk in the figure indicates the ID number of the VOB, and C_IDNk indicates the ID number of the Cell.
[0034]
The Cell is composed of a plurality of VOBUs (Video Object Units). The VOBU includes NV_PCK (navigation pack), A_PCK (audio pack), V_PCK (video pack), and SP_PCK (sub-picture pack). As shown in FIG. 3, NV_PCK is arranged only at the head of each VOBU.
[0035]
A_PCK contains audio data, V_PCK contains video data, and SP_PCK contains subtitle data, which are individually compressed and encoded and recorded. In NV_PCK, additional information for smoothly performing processes such as normal reproduction and special reproduction is recorded. One of them is PCI (presentation control information), and NV_PCK_LBN (LBN of navigation pack) is recorded therein. Have been. By reading this data, the start address of the navigation pack can be known.
[0036]
FIG. 4 is a block diagram illustrating a configuration of the DVD reproducing device 10. The DVD reproducing device 10 includes a pickup 11, an RF amplifier 12, a motor 14, a servo circuit 14, a signal processing circuit 15, a track buffer 16, a system decoder 17, a system microcomputer 18, and a display unit 19. Have.
[0037]
The pickup 11 irradiates a laser beam having a predetermined wavelength toward the recording surface of the disk d, receives the reflected light, and converts the reflected light into an electric signal (reflected light detection signal). The pickup 11 supplies the reflected light detection signal to the RF amplifier 12. Note that the pickup 11 is supported by a predetermined guide shaft or the like so as to be movable in the radial direction of the disk d so that target data can be appropriately read from the disk d.
[0038]
The RF amplifier 12 generates an RF signal, a tracking signal, a focus signal, and the like from the reflected light detection signal supplied from the pickup 11. Further, a binary signal obtained by data slicing the RF signal is generated. The RF amplifier 12 supplies the generated tracking signal and the like to the servo circuit 14, and supplies the generated binary signal to the signal processing circuit 15 as a reproduction signal.
[0039]
The motor 13 includes a spindle motor for rotating a predetermined turntable on which the disk d is mounted. The motor 13 is controlled by the server circuit 14 and drives the disk d to rotate at a constant linear velocity, for example.
[0040]
The servo circuit 14 controls the driving of the motor 13 and drives it to rotate at a predetermined rotation speed. Further, the servo circuit 14 controls the driving of a thread motor (not shown) by a tracking signal or the like supplied from the RF amplifier 12, and moves the pickup 11 in the radial direction of the disk d as appropriate.
[0041]
The signal processing circuit 15 demodulates the reproduction signal supplied from the RF amplifier 12 and performs error correction and the like. The signal processing circuit 15 sequentially supplies the demodulated data obtained by the demodulation and the like to the track buffer 16.
[0042]
The track buffer 16 includes a RAM having a predetermined capacity or the like, and sequentially stores demodulated data supplied from the signal processing circuit 15. The demodulated data stored in the track buffer 16 is sequentially supplied to the system decoder 17.
[0043]
The system decoder 17 decodes the demodulated data supplied from the track buffer 16 and generates video data, audio data, and the like. The system decoder 17 supplies the generated video data and audio data to a predetermined AV amplifier or the like.
[0044]
The system microcomputer 18 is composed of, for example, a one-chip microcomputer including a ROM, a RAM, and a CPU, and controls the entire DVD playback device 10. The system microcomputer 18 controls the servo circuit 14 and the like, acquires the PGCI recorded in advance on the disk d, and stores it in its own RAM or the like. Then, a PGC operation for reading the target Cell according to the stored PGCI is executed.
[0045]
Specifically, when executing the PGC operation, the system microcomputer 18 obtains NV_PCK, which is the reproduction management information of the above-described VOBU forming the Cell, and reproduces the target data (VOBU) from the disk d according to the NV_PCK. That is, upon acquiring NV_PCK, the system microcomputer 18 sets the address of the target data to be read, controls the servo circuit 14 and the like, and searches for the target data at the set address. Then, the searched target data is read from the disk d, and the signal control circuit 15 is controlled to perform demodulation and error correction of the read target data (reproduced signal), and store the demodulated data in the track buffer 16. The system microcomputer 18 repeatedly performs a series of operations including address setting, search, reading, demodulation / error correction, data storage, and the like according to the free space of the track buffer 16 and the like.
[0046]
In parallel with these operations, the system microcomputer 18 controls the system decoder 17 to decode the demodulated data stored in the track buffer 16 and sequentially reproduce video data and audio data.
[0047]
The display unit 19 includes an LCD (Liquid Crystal Display) panel or the like, and displays the operation status of the DVD playback device 10 and the like.
[0048]
Hereinafter, the operation of the DVD playback device 10 will be described. First, an AB repeat function for repeatedly reproducing between two set points will be described. FIG. 5 is a flowchart showing an example of the operation at the time of setting the AB repeat. If the user presses the remote control or the point setting key (not shown) of the main body in step S10 during the reproduction of the DVD, the process proceeds to step S11 to store the address of the NV_PCK being reproduced as point A. Subsequently, the process proceeds to step S12 to store data necessary for reproduction (current reproduction conditions). This data includes an angle, designation of a subtitle (designation of a language), a type of audio, and the like.
[0049]
Next, the process proceeds to step S13, and it is determined whether or not the currently reproduced title has ended. If the title being reproduced has ended in step S13, the process proceeds to step S15 to forcibly set the point B. This is because in normal use, there is no need to set AB repeat across titles. On the other hand, if the title being reproduced has not ended in step S13, the flow advances to step S14 to determine whether or not the point setting key has been pressed. If the location setting key has not been pressed in step S14, the process returns to step S13. On the other hand, if the point setting key is pressed in step S14, it is determined that point B has been set, and the process proceeds to step S15.
[0050]
In step S15, the address of the NV_PCK being reproduced is stored as point B. When the title ends, the address of the last NV_PCK is stored as point B. After step S15 is completed, the process returns to step S10, and a series of AB repeat setting processing can be repeated. At this time, a plurality of sections of AB repeat may be stored by storing the next set points A and B separately from the points already stored. If the specification is made such that the points A and B to be set next are overwritten on the points already stored, only the latest points A and B are always stored.
[0051]
Step S13 is not always necessary, and may be omitted depending on the specifications of the product. In that case, AB repeat can be set across titles.
[0052]
When the setting of AB repeat is completed by the above method, AB repeat can be executed. FIG. 6 is a flowchart showing an example of the operation at the time of executing the AB repeat. When the user presses an AB repeat execution key (not shown) on the remote controller or the main body, the address of the NV_PCK at point A is read in step S20. Subsequently, the process proceeds to step S21, in which the stored data necessary for reproduction is also read. Then, the process proceeds to step S22 to set the conditions of the read data, and to start the reproduction from the point A.
[0053]
Next, the process proceeds to step S23 to read out the address of NV_PCK at point B, and then proceeds to step S24 to determine whether or not reproduction has been performed up to point B. When the reproduction to the point B has been completed in step S24, it is determined that the AB repeat section has ended, and the flow advances to step S25 to end the reproduction. Thereafter, the process returns from step S25 to step S20 to repeat a series of execution processing. Here, when a plurality of AB repeat sections are set, the next AB repeat section is reproduced, and when only the latest AB repeat section is set, the AB repeat section is reproduced. Play repeatedly.
[0054]
Next, a marker search function for reproducing from the set marker points will be described. FIG. 7 is a flowchart illustrating an example of an operation when setting a marker. If the user presses a marker setting key (not shown) of the remote controller or the main body in step S30 during the reproduction of the DVD, the process proceeds to step S31 to store the address of the NV_PCK being reproduced as a marker point. Then, the process proceeds to step S32 to store data necessary for reproduction (current reproduction conditions). This data includes an angle, designation of a subtitle (designation of a language), a type of audio, and the like.
[0055]
After step S32 is completed, the process returns to step S30, and a series of marker setting processing can be repeated. At this time, a plurality of markers may be stored by storing the marker points to be set next separately from the points already stored. If the next marker point is set so as to overwrite the already stored marker point, only the latest marker point is always stored.
[0056]
When the marker setting is completed by the above method, a marker search can be executed. FIG. 8 is a flowchart illustrating an example of an operation when executing a marker search. When the marker search execution key (not shown) on the remote control or the main body is pressed by the user, the NV_PCK address of the marker point is read in step S40. Subsequently, the process proceeds to step S41, in which the stored data necessary for reproduction is also read. Then, the process proceeds to step S42 to set the conditions of the read data, and starts reproduction from the marker point.
[0057]
When a plurality of markers are stored, a list of markers (marker number, title, time, etc.) may be displayed when the marker search execution key is pressed, so that a desired marker can be selected.
[0058]
As described above, by using the address of NV_PCK as the information on the playback position of the AB repeat or marker search, the designated playback position can be searched without using the TMU, and the deviation from the designated playback position can be detected. Can be eliminated. Therefore, the user can perform each setting operation in the same manner as in the related art, and is a DVD playback device that can be reproduced accurately from a desired scene and that is comfortable and easy to use.
[0059]
Further, in Patent Literature 1 and Patent Literature 2, since a GOP is stored and reproduced, if the GOP is damaged, it cannot be used. Furthermore, even if NV_PCK has a flaw, it cannot be reproduced. On the other hand, according to the present invention, when a GOP is damaged, the GOP is skipped and reproduced, so that there is no problem. Then, if the NV_PCK is not damaged, it can be used. As described above, since reproduction is possible if NV_PCK can be read, it can be said that the DVD reproduction apparatus is not easily affected by DVD scratches.
[0060]
【The invention's effect】
According to the present invention, by using the address of NV_PCK as information of the playback position of AB repeat or marker search, the designated playback position can be searched without using the TMU, and the search from the designated playback position can be performed. Misalignment can be eliminated. Therefore, the user can perform each setting operation in the same manner as in the related art, and can provide a comfortable and easy-to-use DVD reproducing apparatus that is accurately reproduced from a desired scene.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a hierarchical structure of information recorded on a DVD.
FIG. 2 is a diagram illustrating a configuration of a PGCI.
FIG. 3 is a diagram illustrating a hierarchical structure of information included in VTSTT_VOBS.
FIG. 4 is a block diagram illustrating a configuration of a DVD playback device of the present invention.
FIG. 5 is a flowchart illustrating an example of an operation at the time of AB repeat setting.
FIG. 6 is a flowchart illustrating an example of an operation at the time of executing AB repeat.
FIG. 7 is a flowchart illustrating an example of an operation when setting a marker.
FIG. 8 is a flowchart illustrating an example of an operation when executing a marker search.
[Explanation of symbols]
Reference Signs List 10 DVD playback device 11 Pickup 12 RF amplifier 13 Motor 14 Servo circuit 15 Signal processing circuit 16 Track buffer 17 System decoder 18 System microcomputer 19 Display unit

Claims (8)

In a DVD reproducing apparatus having an AB repeat function for repeatedly reproducing between two set points,
When a point setting key for setting the point A or the point B is pressed during the reproduction, data necessary for the reproduction is stored together with the address of the NV_PCK being reproduced,
If the title being played ends after point A is set and before point B is set, the address of the last NV_PCK of the title is stored as point B,
When a plurality of sets of the points A and B are set and the AB repeat execution key is pressed, the stored addresses of the NV_PCK of the points A and B are read, and the stored data is read and set. A DVD playback device that performs AB repeat in order. In a DVD playback device having a marker search function for playing back from a set marker point,
When a marker setting key for setting a marker point is pressed during reproduction, data necessary for reproduction is stored together with the address of NV_PCK being reproduced,
When a plurality of marker points are set and a marker search execution key is pressed, the NV_PCK address of any of the stored marker points is read, and the stored data is read and reproduced. apparatus. In a DVD reproducing apparatus having an AB repeat function for repeatedly reproducing between two set points,
When the point setting key for setting the point A or the point B is pressed during the reproduction, the address of the NV_PCK being reproduced is stored,
When the AB repeat execution key is pressed, the stored NV_PCK addresses of the points A and B are read out and reproduced from the points A to B. In addition to storing the address of the NV_PCK during playback, data necessary for playback is stored.
4. The DVD reproducing apparatus according to claim 3, wherein the stored data is read together with the reading of the stored NV_PCK address. 5. When the title being reproduced ends after the point A is set and before the point B is set, the address of the last NV_PCK of the title is stored as the point B. The DVD playback device according to the above. 5. The DVD reproducing apparatus according to claim 3, wherein a plurality of sets of point A and point B are set, and when the AB repeat execution key is pressed, AB repeat is performed in the set order. In a DVD playback device having a marker search function for playing back from a set marker point,
When a marker setting key for setting a marker point is pressed during reproduction, the address of NV_PCK being reproduced is stored,
A DVD reproducing apparatus characterized in that when a marker search execution key is pressed, the NV_PCK address of the stored marker point is read and reproduced. In addition to storing the address of the NV_PCK during playback, data necessary for playback is stored.
8. The DVD reproducing apparatus according to claim 7, wherein the stored data is read together with the reading of the stored NV_PCK address.

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