JP2005150871A - Optical disc reproducer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disc reproducer having a function capable of pausing automatically without ending a title during fast-forward reproduction when a fast-forward reproduction object reaches the end of the title. <P>SOLUTION: When a decision is made that a fast-forward reproduction object reached the end of a title based on search information and program chain information included in data search information within a video object unit during fast-forward reproduction of the title recorded on an optical disc 1, a system controller 22 controls fast-forward reproduction to stop at that moment in time and to display a still image. Since operation of a reproduction attentive to the operating timing by a user for viewing climax of a movie is not required, convenience is enhanced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to an optical disc reproducing apparatus for reproducing information recorded on an optical disc, and in particular,
The present invention relates to an optical disc playback apparatus having a function capable of pausing during fast-forward playback.

2. Description of the Related Art Conventionally, an optical disk playback apparatus has a fast-forward playback function for performing fast-forward playback (FF) at a high speed in addition to a playback function for playing back information on an optical disk at a normal speed. For example, when a DVD (Digital Versatile Disc) as an optical disc on which movie information is recorded is set in an optical disc playback device and the DVD is fast-forwarded and played by a user operation, the movie title (information for one movie) is stopped. The image is displayed on the display device in a state where the image is skipped.
Japanese Patent Laid-Open No. 11-306640 JP 2000-149514 A

However, when a user wants to watch a climax of a movie title, for example, skips a still image of the video by fast-forwarding and wants to pause when the fast-forward playback target comes to the end of the title. If the key press timing is delayed for a moment,
The optical disc playback apparatus has finished the process for the title, and for example, moved to a menu display process or a process for jumping to another title.

In other words, the conventional optical disc playback apparatus does not have a function of performing pause processing automatically during fast-forward playback. Therefore, when the timing of pressing the playback key by the user is momentarily delayed, fast-forward playback of the title is terminated. , Move on to menu display processing and processing to jump to another title. Therefore, in order to view the climax, it is necessary to skip the still image of the video by fast-forwarding again from the beginning, and when the fast-forward playback target comes to the end of the title, the user must press the playback key. Therefore, the conventional optical disk reproducing apparatus has a problem that it is inferior to use.

In the prior art disclosed in Patent Document 1, the single reproduction or continuous reproduction of the title is controlled, and the pause is not automatically applied at the end of the title, so that the above-described problems can be solved. It is not a thing.

Further, in the prior art of Patent Document 2, the detailed setting contents are grasped before starting the reproduction operation corresponding to each title, and the setting can be easily performed. It is not possible to solve the above-mentioned problems because the pose is not automatically applied.

The present invention has been made to solve the above-described problems, and automatically pauses a title without ending it when the fast-forward playback target reaches the end of the title during fast-forward playback of the title. An object of the present invention is to provide an optical disk reproducing apparatus having a function capable of performing the above.

In order to achieve the above object, according to the first aspect of the present invention, during fast-forward playback of a title recorded on an optical disc, fast-forward playback within a program chain is performed based on program chain information included in data search information within a video object unit. A final cell determination means for determining whether or not the current cell of interest is the last cell; and jumping based on search information in the video object unit when it is determined that the current cell of fast-forward playback is the final cell. A destination determination means for determining whether or not the forward information has a predetermined value indicating that there is no destination, and the forward information of the destination is a predetermined value indicating that there is no destination If it is judged, the zero judgment procedure for judging whether the next program chain number of the program chain information is zero or not. And a system controller having pause processing means for performing pause processing for stopping fast-forward playback and displaying a still image when it is determined that the next program chain number is zero. Providing equipment.

In this configuration, during fast forward playback of the title recorded on the optical disc, the system controller determines that the current cell to be fast forward played in the program chain is the last cell based on the program chain information included in the data search information in the video object unit. Is determined by the final cell determination means, and when it is determined that the current cell to be fast-forwarded playback is the final cell, the forward information of the jump destination is determined based on the search information in the video object unit. It is judged by the jump destination judging means whether or not a predetermined value indicating that there is no occurrence.

When it is determined that the forward information of the jump destination is a predetermined value indicating that there is no jump destination, it is determined by the zero determination means whether the next program chain number of the program chain information is zero or not. To do. The title is Program Chain 1
In the case of being composed of pieces, since there is no jump destination, when it is determined by the jump destination determination means that there is no jump destination, the process proceeds to pause processing by the pause processing means, fast-playback is stopped, and a still image is displayed. Display.

If there are a plurality of titles, it is determined that the forward information of the jump destination has a predetermined value indicating that there is no jump destination, and the next program chain number of the program chain information is zero. Whether or not is determined by zero determination means. And
When it is determined that the next program chain number of the program chain information is zero, the process proceeds to pause processing by the pause processing means, and fast-forward playback is stopped to display a still image.

According to this configuration, during fast-forward playback of a title, when the fast-forward playback target reaches the end of the title, it is possible to automatically pause without ending the title. There is no need to operate the reproduction key so as to care about the operation timing by the user for viewing, which improves usability.

According to a second aspect of the present invention, in an optical disk reproducing apparatus for reproducing information recorded on an optical disk, search information and program chain information included in data search information in a video object unit during fast-forward reproduction of a title recorded on the optical disk An optical disc playback apparatus comprising: a system controller that performs control to stop fast-forward playback and display a still image at this time when it is determined that the fast-forward playback target has reached the end of the title based on provide.

In this configuration, during fast-forward playback of the title recorded on the optical disc, the system controller determines that the fast-forward playback target has reached the end of the title based on the search information and program chain information included in the data search information in the video object unit. When it is determined that the image has been played, control is performed to stop fast-forward playback and display a still image at this point.

According to this configuration, during fast-forward playback of a title, when the fast-forward playback target reaches the end of the title, it is possible to automatically pause without ending the title. There is no need to operate the reproduction key so as to care about the operation timing by the user for viewing, which improves usability.

According to a third aspect of the present invention, in the second aspect of the present invention, the system controller is configured to include the program chain information based on the program chain information included in the data search information in the video object unit during fast-forward playback of the title recorded on the optical disc. Final cell determination means for determining whether or not the current cell subject to fast-forward playback is the last cell, and search information in the video object unit when the current cell subject to fast-forward playback is determined to be the last cell. A destination determination unit that determines whether or not the destination forward information has a predetermined value indicating that there is no destination, and the destination forward information has a predetermined value that indicates that there is no destination. If it is determined that the next program chain number in the program chain information is zero And a pause processing means for performing a pause process for stopping the fast-forward playback and displaying a still image when it is determined that the next program chain number is zero. During playback, when the fast-forward playback target reaches the end of the title, it is possible to pause automatically without ending the title.

As described above, according to the present invention, during fast-forward playback of a title recorded on an optical disc, the current cell to be fast-forward played in the program chain is determined based on the program chain information included in the data search information in the video object unit. Last cell determination means for determining whether or not it is the last cell, and when the current cell to be fast-forwarded playback is determined to be the last cell, forward destination forward information is determined based on search information in the video object unit. A jump destination determination unit that determines whether or not a jump destination has a predetermined value, and when the jump destination forward information is determined to be a predetermined value that indicates that there is no jump destination. Zero determination means for determining whether or not the next program chain number of the program chain information is zero; When the program chain number is determined to be zero, it has a system controller that has a pause processing means for performing pause processing to stop fast-forward playback and display a still image, so fast-forward playback during title fast-forward playback When the target reaches the end of the title, the pause key can be paused automatically without ending the title, so that, for example, a playback key that cares about the user's operation timing for watching a movie climax, etc. The operation of is no longer necessary, improving usability.

According to the present invention, during fast-forward playback of a title recorded on an optical disc, the fast-forward playback target reaches the end of the title based on search information and program chain information included in the data search information in the video object unit. At this point, the system controller that controls to stop the fast-forward playback and display the still image is provided, so that when the fast-forward playback target reaches the end of the title, It is possible to pause automatically without ending, and this eliminates the need to operate the playback key, for example, to worry about the user's operation timing for watching the climax of a movie. To do.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc reproducing apparatus according to an embodiment of the present invention. The optical disk reproducing apparatus includes a spindle motor 5 that rotates the optical disk 1, an optical pickup 2 that emits a laser beam for reproducing information recorded on the optical disk 1 and receives reflected light from the optical disk 1, and the light. A sled 3 for moving the pickup 2 in the radial direction of the optical disc 1, and a spindle motor 5 and the sled 3 are driven in accordance with an instruction from the system controller 22 and an objective lens (not shown) built in the optical pickup 2 is provided. A servo control unit 4 is provided for performing control to move the focal position of the laser beam in the vertical direction and the horizontal direction with respect to the recording surface of the optical disc 1 by moving.

The optical disk reproducing apparatus also includes an RF amplifier 6 that amplifies an RF signal that is a read signal from the optical pickup 2 during reproduction of the optical disk 1, and an RF output from the RF amplifier 6.
A digital signal processing unit 8 that stores data generated by performing signal demodulation processing and error correction processing according to the data format of the optical disk 1 after converting the signal into digital data in the RAM 7, and digital according to instructions from the system controller 22 A stream separation unit 9 is provided that separates audio data, sub-picture data, and video data from the data stream output from the signal processing unit 8.

In addition, the optical disc reproducing apparatus receives audio data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data for performing the decoding process in the audio decoder 11. The RAM 10 to store, the sub-picture decoder 13 that inputs the sub-picture data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data to perform the decoding process in the sub-picture decoder 13 A RAM 12 to store, a video decoder 15 for inputting video data output from the stream separator 9 and performing a predetermined decoding process, and the video decoder 1
And a RAM 14 for temporarily storing data in order to perform the decoding process in FIG.

In addition, this optical disk reproducing apparatus combines the data output from the video decoder 15 and the data output from the sub-picture decoder 13 in accordance with an instruction from the system controller 22, and the video processor 17 outputs the data. A video encoder 18 for converting the synthesized data into a video signal for display and displaying an image on the display device 20, and D for converting the data output from the audio decoder 11 into an analog audio signal and supplying the analog audio signal to the speaker 19, for example. / A converter 16.

In addition, the optical disk playback apparatus controls the operation unit 21 having various operation keys such as a playback key for giving a playback instruction to the system controller 22 and a stop key for instructing a playback stop, and the entire apparatus. The system controller 22 is provided. The operation unit 21 may be a remote controller or an operation unit provided on the operation panel of the apparatus main body.

In addition, this optical disk reproducing apparatus performs a calculation process according to the flash ROM 23 storing a program and data for controlling each component of the apparatus and controlling the entire apparatus, and the program and data of the flash ROM 23. And a CPU 24 for controlling the system controller 22.

The system controller 22 is a component that characterizes the present embodiment.
During the fast-forward playback of the title recorded on the current cell, the current cell of the fast-forward playback target in the program chain (PGC) based on the program chain information (PGCI) included in the data search information (DSI) in the video object unit (VOBU) The final cell determination means 221 for determining whether or not is the last cell, and search information (SRI) in the video object unit (VOBU) when it is determined that the current cell subject to fast-forward playback is the last cell. Based on the jump destination determination unit 222 for determining whether or not the destination forward information (FWDI) has a predetermined value indicating that there is no destination, the destination forward information (FWDI) has no destination. If the program chain information (PGCI) is determined to be a predetermined value indicating that Zero determination unit 223 determines a ram Chain number (Next_PGCN) is whether or not zero, the next program chain number (
And pause processing means 224 for performing pause processing for stopping fast-forward playback and displaying a still image when it is determined that (Next_PGCN) is zero.

Video object unit search information (VOBU_SRI), which is search information (SRI) in a video object unit (VOBU), maps the address of a video object unit (VOBU) played back and forth from the video object unit (VOBU). Say that information. The program chain information (PGCI) is information for reproducing a reproduction unit called a program chain (PGC), and the title is composed of one or more program chains (PGC).

FIG. 2 is a diagram showing a data structure recorded on a DVD video optical disc in the present embodiment. 2, the video object set (VOBS) includes a plurality of video objects (VOB), that is, (V0B_IDN1), (V0B_IDN2),.
(V0B_IDNi). IDN1, IDN2,..., IDNi are
Indicates the identification number. Each video object (VOB) is composed of a plurality of cells (Cells). For example, a video object (V0B_IDN1) has a plurality of cells (
C_IDN1), (C_IDN2),..., (C_IDNj). In addition,
IDN1, IDN2,..., IDNj indicate identification numbers.

For example, the cell (C_IDN1) is composed of a plurality of video object units (VOBU). Each video object unit (VOBU) has a navigation pack (
NV_PCK), audio pack (A_PCK), video pack (V_PCK), and sub-picture pack (SP_PCK).

The navigation pack (NV_PCK) and the audio pack (A_PCK)
) Is composed of, for example, 2048 bytes, for example, a 14-byte pack header (Pac
k header), 24-byte system header (System header),
6-byte packet header (Packet header), 1-byte substream identifier (Sub_stream_id), 979-byte play control information data (PCI data), 6-byte packet header (Packet header)
1-byte substream identifier (Sub_stream_id) and 1017-byte data search information data (DSI data).

A play control packet (PCI_PKT) is composed of a 6-byte packet header (Packet header), a 1-byte substream identifier (Sub_stream_id), and 979-byte play control information data (PCI data). A 6-byte packet header (Packet header), a 1-byte substream identifier (Sub_stream_id), and a 1017-byte data search information data (DSI data) make a data search information packet (DSI_PKT).
Configure.

Data search information data (DSI data) composed of 1017 bytes includes 32-byte data search information general information, 148-byte seamless reproduction information (SMI_
PBI), 54 bytes of seamless angle information (SML_AGLI), 168 bytes of video object unit search information (VOBU_SRI), 144 bytes of synchronization information (SYNCI), and 471 bytes of reserved.

The 168-byte video object unit search information (VOBU_SRI) is composed of 4-byte video forward information (FWDI Video), a 160-byte data area, and 4-byte video backward information (BWDI Video). .
The video forward information (FWDI Video) is the next video object unit (VOBU) in the video stream (navigation pack start address).
Indicates the start address. The video backward information (BWDI Video) indicates the start address of the previous video object unit (VOBU) in the video stream (start address of the navigation pack).

FIG. 3 is a flowchart for explaining the process of pausing at the end of the title in this embodiment. With reference to this flowchart, a process for pausing at the end of the title will be described.

When the DVD video optical disk 1 is set in the optical disk playback apparatus of this embodiment and then the fast-forward key of the operation unit 21 is pressed (step S1), fast-forward playback of information on the optical disk 1 is started, that is, fast-forward playback of a still image. Is started (step S2). Then, during fast forward playback, the final cell determination means 221 in the system controller 22 includes the program chain (PGC) in the program chain (PGC) based on the program chain information (PGCI) included in the data search information (DSI) in the video object unit (VOBU). It is determined whether or not the current cell subject to fast-forward playback is the last cell.

The program chain (PGC) is divided into reproduction units called cells, but the program chain (PGC) has a cell reproduction table (C_PBIT).
) Exists, and the number of cells (Cell) in the program chain (PGC) can be determined by counting the number of the reproduction tables (C_PBIT). That is, since the program chain (PGC) always starts from the cell (Cell # 1), the final cell (Cell) can also be known. Thereby, the reproduction cell determination means 221 can determine the last cell (Cell) during fast-forward reproduction.

When the final cell determination unit 221 determines that the current cell to be fast-forwarded in the program chain (PGC) is the final cell, the jump destination determination unit 222 searches the search information (SRI) in the video object unit (VOBU). ) Based on the forward information (
It is determined whether or not FWDI) is 0x3FFFFFFF indicating that there is no jump destination.

When the title is composed of one program chain (PGC), the jump destination determination means 222 determines that the jump destination forward information (FWDI) is 0x3FFFFFFF, and fast forward playback is performed after that. Since it is natural that there is no target cell (Cell), it is determined that cell end = title end, and in response to this, pause processing means 22
4 performs a pause process. As a result, fast-forward playback is stopped, and the still image at this time is displayed on the display device 20.

If there are a plurality of titles, the zero determination means 223 determines whether or not the next program chain number (Next_PGCN) of the program chain information (PGCI) is zero following the processing of step S4. Program chain information (PG
Looking at the program chain navigation control (PGC_NV_CTL) in CI), there is information called the next program chain number (Next_PGCN). In the next program chain number (Next_PGCN), the number of the program chain (PGC) to be reproduced next to the current program chain (PGC) is written.

Since the next program chain number (Next_PGCN) is 0 (zero) at the end of the title, it is determined that the program chain (PGC) is the final program chain (PGC) of the title, and thereafter, as described above. Similar to the processing in the case where the title consists of one program chain (PGC), the pause processing means 22
4 is performed, whereby fast-forward playback is stopped, and a still image at this time is displayed on the display device 20.

As described above, according to the present embodiment, during fast-forward playback of a title, when the fast-forward playback target reaches the end of the title, it is possible to automatically pause without ending the title. In addition, the operation of the reproduction key that cares about the operation timing by the user for watching the climax of the movie becomes unnecessary, and the usability is improved.

It is a block diagram which shows the structure of the optical disk reproducing | regenerating apparatus concerning one Embodiment of this invention. It is a figure which shows the data structure currently recorded on the optical disk of DVD video in the said embodiment. It is a flowchart for demonstrating the process which pauses at the end of a title in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 22 System controller 221 Final cell determination means 222 Jump destination determination means 223 Zero determination means 224 Pause processing means

Claims (3)

A fast-forward playback target in a program chain based on program chain information included in data search information in a video object unit during fast-forward playback of a title recorded on an optical disk in an optical disk playback device that plays back information recorded on the optical disk A final cell determination means for determining whether the current cell is a final cell, and a jump destination based on search information in the video object unit when it is determined that the current cell to be fast-forwarded playback is the final cell. Destination determination means for determining whether or not the forward information of the destination is a predetermined value indicating that there is no destination, and determination that the forward information of the destination is a predetermined value indicating that there is no destination Whether the next program chain number in the program chain information is zero A system controller having zero determining means for determining and pause processing means for performing a pause process for stopping fast-forward playback and displaying a still image when the next program chain number is determined to be zero; An optical disc reproducing apparatus characterized by the above. In an optical disc playback apparatus that plays back information recorded on an optical disc, during fast forward playback of a title recorded on the optical disc, fast forward playback is performed based on search information and program chain information included in data search information in the video object unit. An optical disc playback apparatus comprising: a system controller that performs control to stop fast-forward playback and display a still image when it is determined that the end of the title has been reached. The system controller determines whether the current cell of the fast-forward playback target in the program chain is the last cell based on the program chain information included in the data search information in the video object unit during fast-forward playback of the title recorded on the optical disc. Final cell determination means for determining whether or not the forward information of the jump destination has no jump destination based on the search information in the video object unit when it is determined that the current cell to be fast-forwarded playback is the final cell Jump destination determination means for determining whether or not a predetermined value indicating whether or not the jump chain forward information is determined to be a predetermined value indicating that there is no jump destination; Zero determination means for determining whether or not the program chain number is zero; The optical disk reproducing apparatus according to claim 2, program chain number is characterized by having a pause processing means for performing a pause process of displaying a still image by stopping the fast-forward reproduction when it is determined to be zero.

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