JP2008263303A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device which is configured so that a user can freely specify the reproduction speed of high-speed reproduction. <P>SOLUTION: When high-speed reproduction (fast forwarding) is instructed during reproduction, a control unit 6 decides whether a jump destination VOBU of a VOBU 1029 reproduced at present is (M=) 6 VOBUs, ahead of the VOBU 1029 being reproduced at the present. When the jump destination VOVU is present 7 VOBUs or more ahead, the control unit 6 refers to an ADMAP 200 recorded in a RAM 6A. Furthermore, the control unit 6 retrieves position information, corresponding to the VOBU 1029 being reproduced at present from the ADMP 200. Then the control unit 6 detects the address of the jump destination VOBU from the ADMAP 200, based on the position information corresponding to the VOBU 1029 being reproduced at the present. Lastly, the control unit 6 makes a PU head 2 read out the jump destination VOBU existing in the detected address to reproduce it. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical disk apparatus that reproduces digital information from an optical disk such as a DVD (Digital Versatile Disc), and more particularly to an optical disk apparatus that performs high-speed reproduction at a higher reproduction speed than normal reproduction.

  2. Description of the Related Art Conventionally, an optical disk device that reproduces an optical disk such as a DVD has a high-speed playback function called fast forward. In this optical disc, content data is recorded in units called video object units (VOBU). In the DVD standard, the address of the VOBU acquired after the VOBU currently being reproduced is recorded as VOBU_SRI (video object unit search information) in the navigation pack NV_PCK recorded at the head of the VOBU. In VOBU_SRI, a plurality of head addresses of VOBU to be played back at 0.5 × M seconds before and after the playback time of the current VOBU are recorded.

  The optical disc apparatus plays back in the order of recorded VOBUs during normal playback. On the other hand, at the time of high-speed playback, which has a higher playback speed than normal playback, the optical disc apparatus plays back VOBU by skipping every other VOBU based on the above VOBU_SRI, and sequentially plays back VOBUs separated in time. In this high-speed playback, in order to support high-speed high-speed playback with a large number of interlaces, the VOBU head address of the VOBU that is far away from the current VOBU needs to be recorded in the VOBU_SRI.

When the user designates a desired reproduction speed and instructs high-speed reproduction of the optical disk to the optical disk apparatus as described above, the optical disk apparatus reproduces the optical disk at a designated reproduction speed at high speed.
In Patent Document 1, a playback apparatus is proposed.
JP 2006-202402 A

However, it is determined by the DVD standard how many VOBUs away from the current VOBU are written in VOBU_SRI. For example, in the DVD + VR format, it is determined that up to 6 (= M) VOBU leading addresses are described. For this reason, the conventional optical disk apparatus has a limitation on the reproduction speed of high-speed reproduction according to the DVD standard.
Therefore, there is a limit to the playback speed of high-speed playback that can be specified by the user. For example, in the DVD + VR format, since M = 6, only high-speed reproduction with a skip of 0.5 × 6 = 3 seconds was possible. Therefore, in the conventional optical disc apparatus, the user convenience is poor.

  An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an optical disc apparatus configured so that a user can freely specify a reproduction speed for high-speed reproduction.

  The optical disc apparatus of the present invention has the following configuration in order to solve the above problems.

(1) Reproducing means for sequentially reading and reproducing each unit from an optical disc in which content data is recorded for each unit and all position information indicating the address of each unit is recorded on the inner periphery of each unit With
In each of the optical disk apparatuses, each unit stores M pieces of position information indicating addresses of units existing from the own unit to a predetermined M pieces ahead of the content data.
When high-speed playback in which each unit is skipped and played back at a time is instructed during playback, the jump destination unit that is the jump destination of the unit currently being played back is from the currently playing unit to the M destinations. Address detection means for determining whether or not the
The address detecting means includes
(ST1) If the destination unit exists up to the M destinations, the address of the destination unit is detected with reference to the M location information stored in the currently reproduced unit,
(ST2) When the jump destination unit is present at least M + 1, the address of the jump unit is detected with reference to the all position information,
The reproducing means reads and reproduces the jump destination unit existing at the address detected by the address detecting means.

In this configuration, the optical disk is recorded in advance in the DVD + VR format, for example.
When the user instructs high-speed playback during playback, the address detection means makes the above determination. Then, the address detection unit changes the subsequent processing according to the determination result.
When there are M destination units, the address detection unit refers to the M position information because the address of the destination unit is described in the M position information in the unit currently being reproduced. The address of the jump destination unit is detected. Then, the reproducing means reproduces the destination unit existing at the address of the destination unit. As a result, the optical disc apparatus skips and reproduces every other unit based on the M position information of the unit being reproduced, and sequentially reproduces units that are separated in time.
On the other hand, when there are M + 1 or more destination units ahead, the address detection means once accesses the inner circumference from the current playback position because the addresses of M destination units are not described in the position information. Then, all position information is referred to. Then, the address detecting means detects the address of the jump destination unit from all the position information. As a result, the optical disk apparatus jumps and reproduces every other unit based on the total position information, and sequentially reproduces the units that are separated in time.
As described above, the optical disk apparatus can perform high-speed reproduction of an optical disk recorded in any format, skipping M / 2 seconds or more. Therefore, the user can freely specify the playback speed for high-speed playback regardless of the DVD standard. Therefore, user convenience can be improved.

(2) comprising storage means for storing the all-position information recorded on the optical disc when the reproduction of the optical disc is instructed;
In the ST2 during the high-speed playback, the address detecting unit refers to the all-position information from the storage unit when the jump destination unit exists before the M destinations, and the address of the jump destination unit Is detected.

  In this configuration, since the storage unit stores all the position information, the address detecting unit can refer to the entire position information more quickly than when referring to the entire position information from the optical disc. As a result, it is possible to shorten the time from when the user gives an instruction for high-speed playback until the high-speed playback starts. Therefore, user convenience can be further improved.

(3) A switching means for switching whether or not to store the all position information recorded on the optical disk in the storage means when the reproduction of the optical disk is instructed.

In this configuration, when the user switches with the switching key to store all the position information recorded on the optical disc in the storage means, the address detection means refers to the all position information from the storage means as described above. Therefore, it is possible to shorten the time from when the user gives an instruction for high speed playback until the high speed playback starts.
On the other hand, when the user switches with the switch key so that all the position information recorded on the optical disk is not stored in the storage means, the address detection means refers to the entire position information from the optical disk. When referring from the optical disk, the address detection means must move from the currently accessed unit to the inner periphery of the optical disk where all the position information exists. For this reason, it takes a long time until the high-speed reproduction starts after the user instructs the high-speed reproduction. However, since all the position information recorded on the optical disk is not stored in the storage means, the time from when the user gives an instruction for reproduction until the reproduction is started is shortened.
Therefore, the user can decide whether to reduce the time from the start of playback to the start of playback, or to reduce the time from the start of high-speed playback to the start of high-speed playback, depending on how the user uses it. Can be switched. Therefore, user convenience can be further improved.

  According to the present invention, the user can freely specify the playback speed for high-speed playback regardless of the DVD standard. Therefore, user convenience can be improved.

  Hereinafter, an optical disc apparatus according to an embodiment of the present invention will be described.

FIG. 1 is a block diagram showing a main configuration of an optical disc apparatus according to an embodiment of the present invention. An optical disc apparatus 1 includes a pickup head 2 (hereinafter referred to as a PU head 2) that reads data at a designated address with respect to an optical disc 100 set in the apparatus main body 1, a reproduction circuit 3 such as an RF amplifier, A decoder 4 for decoding data, a D / A circuit 5 for D / A converting the data, a control unit 6 for controlling the operation of each unit of the apparatus body 1, a display unit 9 for displaying information, and input from a user An operation unit 10 that receives an operation and a storage unit 11 that stores a control program in which a control method is described in advance are provided.
The optical disk device 1 is a so-called DVD player. The optical disc 100 is a Blu-ray disc, CD, or DVD. Content such as a TV program is recorded on the optical disc 100.
In this embodiment, the optical disk apparatus is described, but a hard disk recorder may be used. In this case, the medium is a hard disk.

The PU head 2 includes a laser diode (LD), a collimator lens, a beam splitter, an objective lens, a photodetector, a thread motor, and a biaxial actuator (not shown).
The PU head 2 is movably attached to an axis extending in the radial direction of the optical disc 100. The sled motor 7 moves the PU head 2 in the radial direction of the optical disc 100.
The LD is a light source that outputs laser light. The photodetector is formed of a plurality of light receiving elements and detects reflected light from the optical disc 100. In the photodetector, for example, the light receiving area is divided into four substantially equally, and four light receiving areas are formed.
The objective lens adjusts the irradiation position of the laser beam on the optical disc 100. The biaxial actuator moves the objective lens in the direction in which the objective lens is brought into contact with and separated from the optical disc 100 and in the radial direction of the optical disc 100.

Next, the operation during reproduction will be described below.
The PU head 2 irradiates the optical disc 100 with a laser beam having a reading power, and detects reflected light from the optical disc 100 with a photodetector. Thereby, the data recorded on the optical disc 100 is optically read.
The reproduction circuit 3 generates and amplifies an RF signal based on the outputs of the plurality of light receiving elements of the PU head 2, processes the RF signal, and extracts AV (Audio Visual) data. Here, the extracted AV data is data in which the content of the optical disc 100 is described, and is encoded by, for example, MPEG (Moving Picture Experts Group). Then, the AV data is temporarily stored in a buffer RAM (not shown) built in the reproduction circuit 3 and then sequentially read out and transferred (output) to the decoder 4.
The decoder 4 decodes AV data stored (stored) in the buffer RAM. The decoded AV data is temporarily stored in a decode RAM (not shown) built in the decoder 4, read again, and sequentially transferred to the D / A circuit 5.
The D / A circuit 5 converts the AV data expanded by the decoder 4 into an analog reproduction signal, and outputs the reproduction signal to the outside. A television 101 is connected to the D / A circuit 5. A user views an image and sound based on the reproduction signal on the television 101.

  The operation unit 10 also includes a plurality of operation keys (not shown) for performing input operations on the apparatus main body, and a remote control receiving unit (not shown) for receiving a control code for the apparatus main body 1 transmitted from a remote controller (not shown). have. The operation unit 10 transmits the control code corresponding to the operation key operated by the user and the control code received by the remote control receiving unit to the control unit 6.

  Among the plurality of operation keys, there are a reproduction key (not shown) for reproducing an image and sound recorded on the optical disc 100, a selection key (not shown) for selecting a desired reproduction title, and a reproduction speed. And a fast-forward key (not shown) for reproducing images and sounds recorded on the optical disc 100 at high speed.

  The storage unit 11 is composed of, for example, an EEPROM.

  The display unit 9 is constituted by a liquid crystal panel, for example. The display unit 9 displays the time, the setting state of the optical disc apparatus 1 and the like.

  The control unit 6 is composed of, for example, a microcomputer. The control unit 6 includes a RAM 6A as a work field for expanding data processed by the control program.

Here, the reproducing circuit 3 and the PU head 2 correspond to “reproducing means” of the present invention. The optical disk device 1 corresponds to the “reproducing device” of the present invention. The control unit 6 corresponds to “address detection means” of the present invention.
In an actual optical disc apparatus, at the time of reading, tracking servo control for adjusting the irradiation time of the laser beam to the center of the track of the optical disc and focus servo control for adjusting the focusing time of the laser beam to the recording surface of the optical disc are performed. However, illustration is omitted in the embodiment of the present invention.

FIG. 2 is a diagram showing a data structure of data on an optical disc recorded in the DVD + VR format. As shown in FIG. 2A, VMGI 95, VMGM_VOBS 96, VMGIbup 97, and titles 1001 to 3001 are recorded on the optical disc 100 recorded in the DVD-Video format from the inner periphery to the outer periphery. In this embodiment, three titles are recorded.
VMGI (Video Manager Information) 95 describes reproduction-related information (control information) of the entire DVD-Video, so-called root menu information. For example, VTSI address information and the like are also described here.
In VMGM_VOBS (Video Object Set for VMG Menu) 96, contents used in the title menu are described. This content is, for example, a title screen showing a list of all titles recorded on the optical disc 100 (see FIG. 5 described later).
VMGIbup 97 is a backup file of VMGI 95.
Hereinafter, VMG refers to VMGI95 or VMGM_VOBS96.

  Next, since the titles 1001 to 3001 are close to the data structure of DVD-VIDEO, which is the DVD standard, the respective components in the title are separated, and are recorded on the optical disc 100 together with the same types of components. . Specifically, the VTSIs 1002 to 3002 of the titles 1001 to 3001 are collected and recorded behind the VMGIbup 97. Similarly, the VOBSs 1003 to 3003 are collectively recorded after the VTSIs 1002 to 3002. Therefore, the optical disc 100 recorded in the DVD + VR format can be reproduced by a reproducing apparatus that can reproduce only DVD-VIDEO.

As a representative of the titles 1001 to 3001, the data structure of the title 1001 will be described below.
The title 1001 includes a VTSI (Video Title Set Information) 1002, a VOBS (Video Object Set) 1003, and a VTSIbup 1004 (see FIG. 2A).
The VTSI 1002 describes control information for the VOBS 1003.
In the VOBS 1003, content for title reproduction is described. The VOBS 1003 includes a plurality of cells 1010 to 1019 as shown in FIG. 2B.
In VTSIbup 1004, a backup file of VTSI 1002 is described.

In the DVD + VR format, data is recorded in predetermined cell units. The cell 1010 includes a plurality of VOBUs (Video Object Units) 1020 to 1029 (see FIG. 2C). The maximum number of cells for one title is 255 cells. Therefore, when 10 hours worth of data is recorded on the optical disc, one cell is 2 minutes 30 seconds, for example. One VOBU is, for example, 0 or 5 seconds.
Note that other cells, for example, the cell 1011 have the same structure as the cell 1010.

In the VOBU 1029, NV_PCK (Navigatyion Pack) 1030 is placed at the head, and then video data, audio data (AV data), etc. are packed and inserted (see FIG. 2D).
Note that other VOBUs such as VOBU1020 have the same structure as VOBU1029.

  Here, the VOBU 1029 will be described below on behalf of all VOBUs. At this time, description will be made assuming that the VOBU 1029 is currently being played back.

  FIG. 3 is a diagram showing the contents stored in the NV_PCK 1030 of FIG. In the DVD standard, the address of the VOBU acquired after the currently played VOBU 1029 is recorded as VOBU_SRI (video object unit search information) 30 in the navigation pack NV_PCK 1030 recorded at the head of the VOBU 1029. The FWDI shown in FIG. 3 is information indicating the start address of the VOBU that is played back 0.5 × M seconds before the playback time of the current VOBU 1029. The BWDI shown in FIG. 3 is information indicating the start address of the VOBU that is played back 0.5 × M seconds after the playback time of the current VOBU 1029. That is, the VOBU_SRI 30 records the start address of the VOBU that is played back 0.5 × M seconds before and after the playback time of the current VOBU 1029. Since M = 6 in the DVD + VR format, the start address of the VOBU that is played back 3 seconds before and after the playback time of the current VOBU 1029 is recorded in the VOBU_SRI 30.

The optical disc apparatus 1 plays back in the order of recorded VOBUs during normal playback. On the other hand, at the time of high-speed playback, the optical disc apparatus 1 skips and plays back VOBUs every plurality of VOBUs based on the VOBU_SRI of the VOBU being played back, and plays back VOBUs that are separated in time.
Note that the VOBU 1029 corresponds to a “unit” of the present invention. Further, VOBU_SRI 30 corresponds to “M position information” of the present invention.

  Next, the VTSI 1002 of the title 1001 will be described below on behalf of all the VTSIs.

FIG. 4 is a diagram showing the contents stored in the VTSI 1002 of FIG. In the VTSI 1002, an ADMAP (address map) 1102 indicating each address of all VOBUs existing in the title 1001 is recorded. The ADMAP 1102 is defined as a collection of position information. For example, when a time search reproduction designating a specific reproduction time of the title 1001 is instructed by the user, the optical disc apparatus 1 detects the address of the VOBU corresponding to the specific reproduction time from the ADMAP 200, and AV from the VOBU of that address. Play the data.
The ADMAP 200 corresponds to “all position information” of the present invention.

  FIG. 5 is a flowchart showing an operation performed by the control unit of the optical disc apparatus according to the embodiment of the present invention. This operation is performed when the user sets the optical disc 100 in the optical disc apparatus 1 and presses the reproduction key.

  When the reproduction key is pressed to instruct reproduction of the optical disc 100, the control unit 6 instructs the PU head 2 to reproduce the VMG 96 recorded on the optical disc 100 (S1).

  As a result, a list of titles recorded in the VMG 96 is displayed on the television 101 (S2). The user views the list of titles on the television 101 and presses a selection key to select a desired title. This embodiment will be described below assuming that the user has selected the title 1001.

  The control unit 6 moves the PU head 2 to the title 1001 selected by the selection key (S3).

  Then, the control unit 6 makes the PU head 2 refer to the VTSI 1002 of the title 1001 (S4). As a result, the control unit 6 acquires the control information of the title 1001 via the playback circuit 3. The control information includes the above-described ADMAP 200.

The control unit 6 expands the ADMAP 200 stored in the VTSI 1002 on the RAM 6A (S5).
In this embodiment, the ADMAP 200 is developed on the RAM 6A in S5. However, in the implementation, the process of S5 may be passed. In this case, the ADMAP 200 is referred from the optical disc 100 in S104 described later. In implementation, the ADMAP 200 may be expanded on the storage unit 11 in S5.

  The control unit 6 instructs the PU head 2 to reproduce the VOBS 1003 in the title 1001 (S6). As a result, the optical disc apparatus 1 reproduces the VOBU recorded on the VOBS 1003 in order from the first VOBU 1020. As a result, the user views images and sounds included in the VOBS 1003 on the television 101.

  Until the end of the last cell 1019 is reached (S8), that is, during playback, the control unit 6 determines whether or not fast-forwarding is instructed by the operation unit 10 (S7). In S7 and S8, the user can press the fast forward key during playback to play back the playback title at a desired playback speed. This reproduction speed increases according to the number of times the fast-forward key is pressed. The relationship between the playback speed and the number of times of pressing is “X seconds skipping high speed playback = 0, 5 × number of times of pressing”. For example, when the user presses the fast-forward key three times, the high-speed playback is skipped for 15 seconds.

  When the end of the last cell 1019 is reached (S8), the control unit 6 instructs the PU head 2 to stop the reproduction of the optical disc 100 (S9), and ends this process.

  On the other hand, when high speed playback (fast forward) is instructed during playback, the control unit 6 executes + VR fast forward processing (S10).

  FIG. 6 is a flowchart showing the operation of the control unit in the + VR fast-forward process. This operation is performed when the user presses the fast-forward key during playback of the VOBU. This operation will be described below on the assumption that the VOBU currently being reproduced is VOBU1029.

  When high-speed playback (fast forward) is instructed during playback, the control unit 6 includes jump destination VOBUs to which the currently played VOBU 1029 is jumped up to (M =) six ahead of the currently played VOBU 1029. It is determined whether or not to perform (S101). In S101, the following operation is changed according to the playback speed designated by the user. That is, when high-speed playback up to 3 seconds is instructed, that is, when the user presses the fast-forward key 6 times or less, the determination is affirmative. For example, when the user presses the fast-forward key three times, the high-speed playback is skipped for 1 to 5 seconds, so that the determination is affirmative. On the other hand, if the user presses the fast-forward key 8 times, the high-speed playback with a skip of 4 seconds results in a negative determination.

  When there are up to six jump destination VOBUs in S101, the control unit 6 reads the VOBU_SRI30 stored in the currently reproduced VOBU 1029 with the PU head 2, and refers to the VOBU_SRI30 (S102). The reason for providing this processing is that the address of the jump destination VOBU is described in the VOBU_SRI 30 if there are six ahead.

  The control unit 6 detects the address of the jump destination VOBU from the VOBU_SRI 30 (S103).

  The control unit 6 reads and reproduces the jump destination VOBU present at the detected address (S107).

  The control unit 6 then repeats S101, S102, S103, and S107 in order until reproduction is instructed (S108). As a result, based on the VOBU_SRI of the VOBU being played back, the optical disc apparatus 1 skips, for example, every third VOBU and plays back VOBUs that are separated in time. That is, high-speed playback is performed by skipping for 15 seconds. In detail, when the jump destination VOBU is played back as the currently played back VOBU in S107, the control unit 6 refers to the VOBU_SRI in the jump destination VOBU and further jumps over the jump destination VOBU. The address of the destination destination VOBU is detected (S101, S102, S103). In step S107, the control unit 6 reproduces the jump destination VOBU existing at the detected address. Thereafter, this is repeated to realize high-speed reproduction. During this high-speed playback, the user presses the playback key at the point where playback is to be resumed.

  When the playback key is pressed during high-speed playback, the control unit 6 resumes normal playback (S109). And the control part 6 returns to S7 of FIG. 5, and continues a process.

On the other hand, when there are seven or more destination VOBUs in S101, the control unit 6 refers to the ADMAP 200 recorded in the RAM 6A in S5 of FIG. 5 (S104). The reason for providing this processing is that the address of the jump destination VOBU is not described in the VOBU_SRI 30 when there are seven or more destinations. Therefore, in S104, the ADMAP 200 in which the address of the jump destination VOBU is described is referenced.
When the process of S5 is passed, the control unit 6 refers to the ADMAP 200 from the optical disc 100 in S104. However, when referring from the optical disc 100, the control unit 6 must move the PU head 2 from the currently accessed VOBU 1029 to the inner VTSI 1002. For this reason, it takes a long time until the high-speed reproduction starts after the user instructs the high-speed reproduction. Meanwhile, the user is kept waiting.

  The control unit 6 searches the ADMAP 200 for position information corresponding to the VOBU 1029 currently being reproduced (S105). This process is performed by the control unit 6 acquiring the address of the VOBU 1029 currently being reproduced from the PU head 2 and searching the ADMAP 200 for position information describing the same address. Here, the position information corresponding to the VOBU 1029 currently being reproduced is the position information 1200 (see FIG. 4). It is assumed that the address information 1200 describes the address of the VOBU 1029 currently being reproduced.

  Subsequently, the control unit 6 detects the address of the jump destination VOBU from the ADMAP 200 with reference to the position information corresponding to the VOBU 1029 currently being reproduced (S106). This processing is performed, for example, by referring to the positional information 1208 of the eight VOBUs ahead of the reference positional information 1200 if the fast-forward key is pressed eight times and skipped for 4 seconds (see FIG. 4). reference). This position information 1208 describes the address of the 8th VOBU ahead.

  The control unit 6 causes the PU head 2 to read and reproduce the jump destination VOBU present at the detected address (S107).

  The control unit 6 then repeats S101 and S104 to S107 in order until reproduction is instructed (S108). As a result, based on the ADMAP 200, the optical disc device 1 reproduces, for example, every VOBU by skipping every eight VOBUs, and sequentially reproduces the VOBUs separated in time. That is, high-speed playback with a skip of 4 seconds is performed. During this high-speed playback, the user presses the playback key at the point where playback is to be resumed.

  When the playback key is pressed during high-speed playback, the control unit 6 resumes normal playback (S109). And the control part 6 returns to S7 of FIG. 5, and continues a process.

As described above, the optical disc apparatus 1 can perform high-speed reproduction of the optical disc 100 recorded in the DVD + VR format for three or five seconds or more. Therefore, the user can freely specify the playback speed for high-speed playback regardless of the DVD standard. Therefore, user convenience can be improved.
Further, since the control unit 6 develops the ADMAP 200 on the RAM 6A in S5 of FIG. 5, it can quickly refer to the ADMAP 200 in S104 of FIG. As a result, it is possible to shorten the time from when the user gives an instruction for high-speed playback until the high-speed playback starts. Therefore, user convenience can be further improved.

Moreover, the following modifications can be employed in the embodiment of the present invention.
When the reproduction of the optical disc 100 is instructed, a switching key for switching whether to store the ADMAP 200 recorded on the optical disc 100 in the RAM 6A may be provided in the operation unit 10.

When the user switches the ADMAP 200 recorded on the optical disc 100 to the RAM 6A using the switching key, the control unit 6 refers to the ADMAP 200 from the RAM 6A in S104 of FIG. 6 as described above. Therefore, it is possible to shorten the time from when the user gives an instruction for high speed playback until the high speed playback starts.
On the other hand, when the user switches the ADMAP 200 recorded on the optical disc 100 so as not to be stored in the RAM 6A with the switch key, the control unit 6 passes through S5 in FIG. 5 and refers to the ADMAP 200 from the optical disc 100 in S104 in FIG. . When referring from the optical disc 100, the control unit 6 must move the PU head 2 from the currently accessed VOBU 1029 to the inner VTSI 1002. For this reason, it takes a long time until the high-speed reproduction starts after the user instructs the high-speed reproduction. However, the time from when the user issues a playback instruction to when playback is started is shortened by the amount of passing through the process of S5 for expanding the ADMAP 200 recorded on the optical disc 100 to the RAM 6A.

  Therefore, the user can decide whether to reduce the time from the start of playback to the start of playback, or to reduce the time from the start of high-speed playback to the start of high-speed playback, depending on how the user uses it. Can be switched. Therefore, user convenience can be further improved.

1 is a block diagram showing a main configuration of an optical disc apparatus according to an embodiment of the present invention. The figure which shows the data structure of the data on the optical disk recorded by the DVD + VR format The figure which shows the content stored in NV_PCK1030 of FIG. The figure which shows the content stored in VTSI1002 of FIG. The flowchart which shows the operation | movement which the control part of the optical disc apparatus which is embodiment of this invention performs + Flowchart showing the operation of the control unit in the VR fast-forward process

Explanation of symbols

1-optical disk device 2-pickup head 3-reproducing circuit 4-decoder 5-DAC
6A-RAM
6-control unit 9-display unit 10-operation unit 11-storage unit 30-VOBU_SRI
100-optical disc 101-television 200-ADMAP

Claims (4)

Content data is recorded for each unit, and is provided with reproducing means for sequentially reading and reproducing each unit from an optical disc in which all position information indicating the address of each unit is recorded on the inner periphery of each unit.
In each of the optical disk apparatuses, each unit stores M pieces of position information indicating addresses of units existing from the own unit to a predetermined M pieces ahead of the content data.
When high-speed playback in which each unit is skipped and played back at a time is instructed during playback, the jump destination unit that is the jump destination of the unit currently being played back is from the currently playing unit to the M destinations. Address detection means for determining whether or not the
The address detecting means includes
(ST1) If the destination unit exists up to the M destinations, the address of the destination unit is detected with reference to the M location information stored in the currently reproduced unit,
(ST2) When the jump destination unit is present at least M + 1, the address of the jump unit is detected with reference to the all position information,
The optical disc apparatus, wherein the reproduction means reads and reproduces the jump destination unit existing at the address detected by the address detection means. Storage means for storing the all-position information recorded on the optical disc when the reproduction of the optical disc is instructed;
In the ST2 during the high-speed playback, the address detecting unit refers to the all-position information from the storage unit when the jump destination unit exists before the M destinations, and the address of the jump destination unit The optical disc apparatus according to claim 1, wherein   3. The optical disc apparatus according to claim 2, further comprising a switching unit that switches whether to store the all position information recorded on the optical disc in the storage unit when an instruction to reproduce the optical disc is given.   The optical disc apparatus according to claim 1, wherein the optical disc is a DVD.

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