JP2007080329A - Still picture switching position retrieving apparatus of disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a still picture switching position retrieving apparatus of a disk in which position information of a switching point of time of a still picture displayed at the time of reproduction is displayed quickly and a load of a disk evaluator can be lightened largely. <P>SOLUTION: The apparatus is provided with a reading means 4 reading management information about video data including animation and a still picture recorded in a user data area from the disk 1 recorded in a management area, a discriminating means 9 receiving the management information read by the reading means 4 obtaining title information of the video data, and discriminating whether still picture information is included in the video data or not from address data of a head video object unit in cell information constituting each title, and a control means 16 in which when the still picture information is included, information of a reproduction position time of the still picture information is obtained from the control information, also, title numbers of respective still picture information and a time of its switching position are displayed on a display screen by controlling a display means 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disc apparatus for recording / reproducing data on a disc such as a DVD (Digital Versatile Disc), and more particularly to a disc still image switching position search device capable of easily analyzing position information of a defective portion in still image display. About.

Multipurpose discs that record moving images and still images have different recording modes depending on the recording contents of the video / audio information, so that there may be problems with the reproduced images, and various proposals have been made.
For example, a recording apparatus that records information so that the recorded information can be reproduced accurately and smoothly in response to various reproduction modes such as scan reproduction on an information recording medium capable of reproducing a variety of information, and the information A reproducing apparatus for reproducing is known.
This is actually in VOB (Video Object) unit search information included in DSI (Data Search Information) data separated by a system buffer from a demodulated signal Sdm demodulated including moving images and still images. Based on the presence information indicating the video information to be reproduced at the designated reproduction time, the system controller performs reproduction control.
And even if the video data to be played back at the specified playback time and the audio data to be played back at the playback time are recorded at different positions on the DVD, the video and audio can be accurately played back in correspondence. It has become.
Japanese Laid-Open Patent Publication No. 9-259542 is also known, a recording format for handling a plurality of still image information, and a still image continuous information recording method and an information reproducing device for obtaining a data structure of management information. This is an information recording medium capable of recording and reproducing at least still image information. A first information recording unit (VOBU 1641 to 1649) having one piece of still image information and a set of the first information recording units. And has a first group unit (VOB 1632 to 1634 to PTT 1407 and 1408) having a plurality of still image information of different contents, and information is recorded in this first group unit. JP, 2000-32378, A Still picture information management system aiming at improving a still picture information management system is proposed. This management system uses a group of video objects composed of one or more still images and an information medium for recording control information thereof. The control information includes still image cell information for managing a reproduction unit of a still image. The still image cell information includes one or more still image cell entry point information corresponding to one or more reproduction units of a still image, 1 The above still picture cell general information related to the still picture reproduction unit is included. In this still picture cell general information, entry number information corresponding to a video object of a specific still picture is described. Further, there is known a management system for digital information including video information for the purpose of improving a management system for digital information such as handling of a plurality of still image information. In this system, an information recording medium such as a DVD used in the management system can record predetermined control information and object information. This DVD is adapted to record a group of still picture video objects composed of one or more still pictures and predetermined additional audio information. The control information includes still image AV file information for managing a still image video object, the still image AV file information includes group information of the still image video object, and the group information of the still image video object includes still image AV file information. Contains video object entry information. The entry information of the still picture video object is configured to include additional audio group number information indicating a group number of the additional audio information and additional audio entry number information indicating an entry number of the additional audio information. In the picture video object, a sub-picture stream including sub-picture information can be recorded. As a result, in a DVD_RTR (optical disk using phase change) recording / playback system that ensures a certain degree of compatibility and continuity with DVD video, the recording format and management information are consistent or continuous between video and still images. Since a plurality of still picture information is handled while ensuring the security, digital information can be protected and provisional erasure can be managed. By the way, the popular DVD can record moving image information, still image information and audio information at random, but the data structure of the recording track is slightly different depending on the manufacturing company. For this reason, after recording moving image information and still image information, when a desired still image is designated for reproduction by time search or the like and displayed on the monitor screen, or when still images are sequentially reproduced in a slide show, the still images are switched. There was nothing. Therefore, the evaluator sets the inspection mode in the DVD player, checks the defective part of the DVD, and analyzes the cause. In this inspection mode, the address information recorded for each title constituting the picture data of the still image information recorded in the user data area is converted into time data, and the position of each still image is displayed in time on the monitor screen. I am doing so. That is, when this inspection mode is executed, the control unit of the DVD player reproduces the recorded image of the DVD from the beginning, converts the address information into time data, and displays the title of each still image and its recording position on the monitor screen. Are displayed sequentially. The evaluator was checking the time point when the still image was not switched while viewing this display image.

However, such an inspection method requires a long time to analyze one disk because the evaluator keeps viewing the display image on the monitor screen from the beginning and knows when the still image does not switch. , It was a considerable burden for the evaluator.
Each of the inventions in Patent Documents 1 to 4 is intended to improve the handling of still image information, but analyzes the problem that still images do not switch when reproducing pre-recorded image information as described above. Therefore, there has been a need for a technique that can easily check for a defective portion during still image playback.
The present invention has been made in view of the above problems, and displays still position information at the time of switching of a still image displayed at the time of reproduction, and a still image switching position of the disc that can greatly reduce the burden on the disc evaluator. The object is to provide a search device.

In order to achieve the above object, a disc still image analyzing apparatus according to the present invention is a reading means for reading recorded information from a disc in which management information relating to video data including moving images and still images recorded in a user data area is recorded in the management area. In response to the management information read by the reading means, the title information of the video data is acquired, and the still image information is included in the video data from the address data of the first video object unit in the cell information constituting each title. A discriminating unit for discriminating whether or not it is included; and, when the still image information is included, obtains information on the reproduction position time of the still image information from the management information, and controls the display unit Control means for displaying the title number of each still picture information and the time of the switching position on the display screen. It is.
Further, when the control means receives a time search command, based on the information on the reproduction position time of the still image information, the control means starts reproduction from the image information immediately before the still image information specified by the time search time, and A feature is that still images are sequentially displayed on the display screen.
When the control means receives an AB repeat playback command, playback starts from the image information immediately before the still image information corresponding to the point A of the AB repeat position based on the playback position time information of the still image information. Then, still images are sequentially displayed on the display screen.
In addition, when the control means receives the resume reproduction command, it starts reproduction from the image information immediately before the still image information corresponding to the time when the reproduction is stopped based on the reproduction position time information of the still image information. Further, still images are sequentially displayed on the display screen.

As described above, the still image analysis apparatus for discs according to the present invention controls the display means to control each still image information on the display screen when the video data recorded in the user data area includes still image information. Since the title number and the time of the switching position are displayed, it is not necessary to check the position information at the time when the still image is not switched while displaying the still image on the display screen. There is an effect that it is possible to easily analyze the defective part in
Also, when a time search command is received, playback starts from the image information immediately before the still image information specified by the time search time, and the still images are sequentially displayed on the display screen. There is an advantage that can be checked quickly.
When an AB repeat playback command is received, playback starts from the image information immediately before the still image information corresponding to the point A of the AB repeat position and the still images are sequentially displayed on the display screen. There is an advantage that it is possible to quickly check an unswitchable portion of the image.
In addition, when a resume playback command is received, playback starts from the image information immediately before the still image information corresponding to the point at which playback is stopped, and still images are sequentially displayed on the display screen. There is an advantage that the impossible part can be checked quickly.

Embodiments of a disk still image switching position searching apparatus according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a block diagram showing an electrical configuration of a disk still image switching position search device according to an embodiment of the present invention.
The apparatus of the present embodiment is applied to a DVD recorder, and is configured to reproduce recorded information on the DVD 1 by pressing a remote controller (remote controller) 22 and to record information of external input on the DVD 1. Yes. In this example, description will be made mainly on the playback function.
In FIG. 1, reference numeral 2 denotes a disk tray on which a DVD 1 is placed, and is rotated by a disk motor 3. An optical pickup 4 outputs reproduction information optically read from a track of the DVD 1 to the RF amplifier 5.
The RF amplifier 5 sends reproduction information to a DSP (Digital Signal Processor) 6 and a servo control unit 7 which are signal processing units. The output of the servo control unit 7 is guided to the DSP 6.
These RF amplifier 5, DSP 6, servo control unit 7, and the like are controlled by a microcomputer 9 that reproduces information from the DVD 1 (hereinafter referred to as a front-end microcomputer: FE).
The front-end microcomputer 9 includes a buffer and stores management information read by the optical pickup 4.
When there is an access from the back-end microcomputer 16 described later, management information corresponding to the request is output.
The front-end microcomputer 9 receives management information read by the optical pickup 4 and acquires title information of video data recorded on the DVD 1. Then, it is determined from the address data of the first video object unit (VOBU) in the cell information constituting each title whether or not still image information is included in the video data.
The DSP 6 is connected to a track buffer RAM 8, and temporarily stores data amplified by the RF amplifier 5 and decoded in accordance with the DVD standard (here, compressed by MPEG: Motion Picture Expert Group). It has become.
The DSP 6 is connected to a video encoder 13 and a D / A converter 14 via an AV (Audio / Video) decoder 12.
The servo control unit 7 performs focusing servo and tracking servo control for the optical pickup 4 in accordance with commands and control data transmitted and received from the front-end microcomputer 9 via the DSP 6.
Further, the configuration is such that the sled motor 10 that moves the optical pickup 4 in the radial direction of the DVD 1 and the tray motor 11 that drives the disc tray 2 are controlled.
The AV decoder 12 is connected to a microcomputer (hereinafter referred to as a back-end microcomputer: BE) 16 that performs operation control for outputting various information reproduced from the DVD 1.
The AV decoder 12 decompresses the compressed data by MPEG read from the track buffer RAM 8.
The AV decoder 12 is connected to an AV decode RAM 15 and stores several screens of the digital data expanded as described above.
The video encoder 13 encodes the video data from the AV decoder 12 and sends it to the monitor side (not shown) via the output terminal 13a.
Further, the D / A converter 14 converts the audio data from the AV decoder 12 into an analog signal and sends it to the speaker side (not shown) via the output terminal 14a.
The back-end microcomputer 16 includes a work RAM 16a. The work RAM 16a stores time data corresponding to the address assigned to the track of the user data area.
The back-end microcomputer 16 receives information from the front-end microcomputer 9 and executes a process of searching a time map table (TMAPT) relating to the recording position of the still image information recorded on the DVD 1.
At this time, management information related to the recording position of the video title data is acquired, and a switching point of each still image information is searched.
A front panel controller 18 is connected to the back end microcomputer 16. The front panel controller 18 controls the front panel 19 composed of an LCD or the like. The output of the key input unit 20 and the output of the receiving unit 21 that receives an infrared transmission signal from the remote controller 22 are guided.
Further, an OSD (On Screen Display) circuit 17 is connected to the back-end microcomputer 16.
The OSD circuit 17 has an output connected to the video encoder 13 side, outputs an OSD signal based on display control of the back-end microcomputer 16, and displays a menu and still image information on the screen 23a of the monitor 23 shown in FIG. Display the switching position time, etc.
At this time, when the back-end microcomputer 16 converts the reproduction position time information into time data and outputs it to the OSD circuit 17, the OSD circuit 17 sends the data in units of "hours, minutes, seconds" to the monitor 23 side. The time of the switching position of the still image information is displayed on the screen 23a together with each title number.
The remote controller 22 includes various operation keys. As the operation keys, a power key for turning on / off the power, an opening / closing key for opening / closing the tray, a numeric keypad, a menu key, a setting determination key, and the like are provided.
A time search key, AB repeat key, resume playback key, and the like are also provided.
Furthermore, various function keys such as play, stop, fast forward, and fast reverse keys are provided. This function key also serves as a cursor key for selecting a menu item displayed on the screen 23a of the monitor 23.
The menu key outputs a command to display the menu item on the screen 23a of the monitor 23. One of the menu items includes “time display of still image switching position”.
When this “time display of still image switching position” is selected, the display mode is entered, and switching of the still image is performed as described above by VOBU data to be described later indicating the point at which the main data switches from the moving image to the still image. Display position in time.
In the still image information switching position display mode, when the time search key, AB repeat key or resume playback key is selected and operated, the time search mode, AB repeat mode and resume playback mode can be commanded. Yes.
Next, a DVD will be described as an example of a disk.
The DVD 1 has a recording track spirally formed from the inner periphery to the outer periphery, and has a lead-in area, a user data area, and a lead-out area as shown in FIG.
The user data area is set so that the inner circumference side becomes an address “0” and the value increases sequentially toward the outer circumference side.
When audio / video data (AV data) composed of moving images, still images, and audio information is recorded in the user data area, continuous addresses are added to the continuous AV data.
This address is recorded as address number data corresponding to the elapsed time information from the recording start position of each title (video title data) of the video data.
Therefore, when this address number data is read, the recording start and end positions of each title number (for example, title number 1: TT1) recorded in the user data area of the track, and further detailed recording are recorded. The time or the like can be displayed on the screen 23a of the monitor 23.
In this user data area, an AV data area is provided between computer data areas as shown in FIG. 2B, and the AV data is recorded in this area in the smallest sector unit.
This sector is composed of a synchronization signal indicating the boundary between sectors, a sector address indicating the position of the sector on the track, and main data.

All information recorded in the user data area is in file units. The relationship between each data file is managed by a directory structure.
That is, as shown in FIG. 2 (c), a video object, a picture object, an audio object, a thumbnail object, etc., which means a collection (group) of information classified for each content (content), is stored as one AV file. Recorded in the data area.
Here, the video object is video data content recording information, and the picture object is still image information such as a still image or a slide image.
The audio object is recording information of content of audio data.
Furthermore, the thumbnail object is reduced image information such as a thumbnail used when searching for a portion to be viewed in the video data or editing.
Therefore, all video information recorded in the AV data area is included in the video object, all audio information is included in the audio object, and all thumbnail information is included in the thumbnail object.
By the way, the minimum basic unit of video information is referred to as a video object unit (VOBU), and data in this VOBU is configured as an aggregate of each VOBU.
These VOBUs are divided and recorded for each sector of 2048 bytes. Each sector is recorded in a pack structure format.
That is, raw video information, sub-video information, audio information, and dummy information are recorded in each pack format for each pack.
FIG. 2D shows an example of the data structure of a VOBU of still picture information constituting a picture object.
Note that such MPEG video information is divided into groups called group of pictures (GOP) with a required time of 0.5 seconds, and the video information is compressed in units of GOP.
Then, a video information compression unit of VOBU is formed in synchronization with the GOP with substantially the same size as this GOP. Therefore, the length of one VOBU is around 0.5 seconds.
On the other hand, at the time of reproduction, a reproduction procedure is recorded in the reproduction control information (pack control information), and an arbitrary range in an arbitrary VOB can be designated and reproduction can be performed in an arbitrary reproduction order.
Therefore, when video data such as a moving image or a still image is reproduced, the reproduction procedure described in the reproduction control information can designate a range in an arbitrary VOB and reproduce it in an arbitrary reproduction order. The basic unit of video information at the time of reproduction is also called a cell.
Information indicating the video information playback sequence is set by a program chain (PGC). This reproduction sequence is described by designation of one cell or connection information of a plurality of cells.
Here, PGC indicates a unit for executing a series of playbacks in which the playback order of the cells is specified, and the cell indicates a playback section in which playback data in each VOB is specified by a start address and an end address.
Thus, the reproduction data is designated as a cell in, for example, a reproduction section from cell A to cell N, and PGC information is defined in each PGC.
That is, PGC # 1 shows an example composed of cells in which continuous playback sections are designated, and the playback order is started from one of the cells according to the playback mode.
As this playback mode, time search, AB repeat and resume playback are possible.
The lead-in area has an emboss data area and a management area as shown in FIG.
In the embossed data area, as shown in FIG. 2 (c), information on the entire disk such as disk type, disk size, recording density, physical sector number indicating recording start / end positions, etc. Information about production is recorded in advance.
Further, management information related to the main data is recorded in the management area. When the main data is video data, a video title set map table (abbreviation: VTS.TMAPT) is generated as management information.
And this VTS. In the TMAPT, the start address (abbreviation: VTS.TMAPT.SA) of the video title set map table from the title (TT) 1 is described.
This VTS. TMAPT. As shown in FIG. PACK and VIDEO. PACK, AUDIO. PACK, SPU. PACK, NAVI. Information indicating the content of the moving image information or still image information is recorded in the PACK.
In the case of still image information, the number of each still image information and time information indicating each recording position are recorded.
Since the data structure of the recording track is slightly different depending on the production company, the popular DVD configured as described above can reproduce the still image information when moving image information and still image information are recorded. When playing back still images sequentially in a slide show, the still images sometimes switched and were not displayed.
For this reason, it is necessary for the evaluator to check and analyze the defective portion of the DVD, and after setting the DVD in the DVD player, the time display mode at the still image switching position is executed from the menu.
Next, the operation of the disk still image switching position search device will be described with reference to the drawings.
FIG. 3 is a flowchart for explaining the operation of the disk still image switching position search device.
First, when the evaluator checks the disc, the DVD 1 to be evaluated is set on the tray of the DVD recorder.
Then, the remote controller 22 is operated, and the menu is displayed on the screen 23a of the monitor 23 by the menu key, and “time display of still image switching position” is selected from the menu items.
Along with this, the microcomputers 9 and 16 shift to the still image switching position time display mode and start the still image position information acquisition process (step S11).
First, the front-end microcomputer 9 operates the optical system so that the optical pickup 4 reads management information from the lead-in area of the DVD 1 and stores it in the buffer.
First, the title information of the entire title related to the video data including still image information is acquired (step S12).
Next, cell information constituting each title is acquired from the title information (step S13).
Subsequently, a head VOBU address (VTS.TMAPT.SA) in which the position of each cell in which video data is recorded is described is obtained from the cell information (step S14).
Thereafter, VOBU data is acquired from the head VOBU address (step S15).
Then, it is determined whether or not information related to a still image is included in the VOBU data (step S16).
If still image information is included, information on the current playback position time is acquired (step S17) and stored in the buffer (step S18).
Next, it is determined whether or not all cells have been searched (step S19). If the search has not been completed yet, the cell number searched this time is counted up (step S20). In step S13, cell information is acquired again.
On the other hand, if it is determined in step S19 that the search for all cells has been completed, it is determined whether or not all titles have been searched (step S21). If the search has not been completed yet, the title number searched this time is counted. Up (step S22).
In step S12, the title information is acquired again.
On the other hand, if it is determined in step S21 that all titles have been searched, the buffer information is read out, the OSD signal is output from the OSD circuit 17, and the still image position information is displayed on the screen 23a of the monitor 23 before the operation. Exit.
As shown in FIG. 4, the still image position information displays the still image position (switching time point) for each program chain in each title number in units of “hour, minute, second” as still image information.
For example, if there are twelve still images in title number 1 within 1 hour and 35 minutes, “TT1: PGC: 1/00: 00: 00” to “TT1: PGC: 1/01: 35: 00” Is displayed.
Thereafter, the evaluator determines whether or not the still image is displayed without any trouble by designating each time and reproducing the DVD 1. Then, if there is a defective portion that cannot be switched, the time point is analyzed.
As described above, when the evaluator selects the still image information switching position display mode, the time of a plurality of images is displayed on the screen 23a of the monitor 23. At this time, since it is not necessary to reproduce the DVD 1 and it can be displayed within a few seconds from the operation time, it is easy to confirm the switching time of the still image information, and the burden on the evaluator can be reduced.
This DVD recorder can execute various playback modes in addition to the still image information switching position display mode.
This playback mode includes the time search, AB repeat and resume playback described above.
When any playback command is issued from the remote controller 22, the back-end microcomputer 16 operates the playback system together with the front-end microcomputer 9, and executes a mode according to the command content.
First, when a time search command is received, based on the VOBU data of the head VOBU address (VTS.TMAPT.SA) that is information on the reproduction position time of still image information, the time search command immediately before the still image information designated by the time search time is specified. Start playback from image information.
As a result, since still images are sequentially displayed on the screen 23a of the monitor 23, it is possible to quickly check a place where still images cannot be switched in the time search.
Next, when an AB repeat playback command is received, VTS. TMAPT. Based on the SA VOBU data, reproduction is started from the image information immediately before the still image information corresponding to the point A of the AB repeat position.
As a result, the still images are sequentially displayed, so that it is possible to quickly check a place where still images cannot be switched in AB repeat playback.
In addition, when a resume playback command is received, VTS. TMAPT. Based on the VOBU data of SA, the reproduction is started from the image information immediately before the still image information corresponding to the time when the reproduction is stopped.
As a result, still images are sequentially displayed, so that it is possible to quickly check where still images cannot be switched during resume reproduction.
In addition, this apparatus is not limited to said each embodiment, A various change is possible in the range which does not deviate from the meaning of this invention.

It is a block diagram which shows the electric constitution of the still image switching position search device of the disc which is one Embodiment of this invention. It is a schematic explanatory drawing which shows the data structure of a disc. It is a flowchart for demonstrating the still image switching position search processing operation of a disc. It is the screen figure which displayed the time of the still picture switching position.

Explanation of symbols

1 Disc 4 Reading means 9 Discriminating means 16 Control means 17 Display means

Claims (4)

Reading means for reading recorded information from a disc in which management information relating to video data including moving images and still images recorded in the user data area is recorded in the management area;
In response to the management information read by the reading means, the title information of the video data is acquired, and the video data includes still image information from the address data of the first video object unit in the cell information constituting each title. Determining means for determining whether or not
If the still image information is included, information on the reproduction position time of the still image information is acquired from the management information, and the title number of each still image information and its switching are displayed on the display screen by controlling the display means. And a disc still image switching position search device comprising: control means for displaying a position time. When the control means receives a time search command, based on the information on the playback position time of the still image information, playback starts from the image information immediately before the still image information specified by the time search time, and the display screen 2. The disk still image switching position searching device according to claim 1, wherein still images are sequentially displayed on the disc. When the control means receives the AB repeat playback command, it starts playback from the image information immediately before the still image information corresponding to the point A of the AB repeat position based on the playback position time information of the still image information. 2. The disk still image switching position search device according to claim 1, wherein still images are sequentially displayed on the display screen. When the control means receives the resume reproduction command, based on the information on the reproduction position time of the still image information, the control means starts reproduction from the image information immediately before the still image information corresponding to the time when the reproduction is stopped, 2. The disk still image switching position search device according to claim 1, wherein still images are sequentially displayed on a display screen.