JP2007312376A - Playback apparatus, program, and playback method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a playback apparatus, a program, and a playback method that prevent the user from complaining about the product, while maintaining the video output at 24 frames/sec. <P>SOLUTION: The playback apparatus includes: a Clip information reading circuit 5 that reads supplementary information from a recording medium 1, which also includes a video signal, and judges based on the supplementary information whether a frame frequency of the video signal is of a first frame frequency or of a second frame frequency; a mode setting unit 13 that sets either a continuation or non-continuation mode, the continuation mode prohibiting and the non-continuation mode allowing a switch between frame frequencies during a playback; and a 24 Hz-60 Hz conversion circuit 7 and a digital modulation circuit 9 that, if the continuation mode is set, output the obtained video signal if the frame frequency of the video signal is of the first frame frequency as it is, and generate a video signal of the first frame frequency by converting the obtained video signal and output the generated video signal if the obtained video signal is of the second frame frequency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of video output technology.

The video output technique is a technique for reproducing video information recorded on a recording medium or video information transmitted through a transmission path, and outputting a video signal by a method according to the mode setting of the playback device.
Conventionally, video output of 60 frames / second is usually used for such video output so that it can be played back by a television receiver. Recently, monitors and projectors that support a frame frequency of 24 frames / second have also been put on the market. It is being done.

The introduction of such products to the market is to use video information such as movies that are recorded and sold on BD-ROM, the next generation optical disc, and use the same 24 frames / second video signal as the film of the signal source for the main movie. Is expected to increase. In other words, it is intended to respond to market demands for higher image quality by outputting video signals of 24 frames / second as they are.
Regarding the video output technology, there are prior arts described in Patent Document 1 and Non-Patent Document 1.
Japanese Patent Laid-Open No. 2001-223983 (FIG. 1) 1999 AV Review No.87 (Ongen Publishing)

  By the way, for the connection between the BD-ROM player and the monitor, a connection conforming to the HDMI standard (HDMI: High Definition Multimedia Interface) capable of broadband data transmission is often used. In connection with the HDMI standard, data is exchanged between apparatuses in synchronization, and therefore resynchronization is required between apparatuses in order to switch the frame frequency of a video signal. This resynchronization process may take several seconds, during which video output stops. Also, unlike the HDMI standard, even when a connection method that does not require resynchronization is used, if the frame frequency of the video signal changes suddenly, the display is disturbed or the display is interrupted.

  Here, in the BD-ROM package software, even if the movie main part is recorded with a video signal of 24 frames / second, filming is generally not performed for parts other than the main part such as extra images and menus such as making, etc. As usual, it is recorded with a video signal of 60 frames / second. Therefore, if a playback path that moves from the menu to the main part is selected during playback of the BD-ROM package, the frame frequency may be different between the menu and the main part, and video output may stop for a few seconds due to HDMI resynchronization processing. There is.

No matter how high the image quality can be achieved by video output at 24 frames / second, the sudden occurrence of a stop for several seconds is a problem that can develop into a product complaint.
An object of the present invention is to provide a playback device, a program, and a playback method capable of avoiding the development of product complaints while maintaining the opportunity for video output at 24 frames / second.

  In order to achieve the above object, a playback apparatus according to the present invention is a playback apparatus that outputs a video signal obtained by reading video information recorded on a recording medium to a display device, and the recording medium includes The accompanying information indicating whether the frame frequency of the video signal is the first frame frequency or the second frame frequency is recorded together with the video information, and the video signal to be reproduced by reading the accompanying information from the recording medium May be a video signal determination means for determining whether the first frame frequency signal or the second frame frequency signal, a continuous mode in which there is no switching of the frame frequency during playback, and a switching of the frame frequency during playback may occur. Mode setting means for setting any one of the non-continuous modes as an operation mode of the own device according to the user's selection; If the result of determination by the video signal determination means is that the video signal to be reproduced is a first frame frequency signal, the first frame frequency signal is output at the first frame frequency, and the video signal determination If the video signal to be reproduced is a second frame frequency signal as a result of the determination by the means, a reproduction means for converting the frame frequency of the second frame frequency signal into the first frame frequency and outputting the converted signal is provided. Yes.

  In order to achieve the above object, the program according to the present invention can be read by a computer incorporated in a playback device that outputs a video signal obtained by reading video information recorded on a recording medium to a display device. In the program, the recording medium records accompanying information indicating whether the frame frequency of the video signal is a first frame frequency or a second frame frequency, together with the video information, and the recording medium A video signal determination step for determining whether the video signal to be reproduced is the first frame frequency signal or the second frame frequency signal by reading the accompanying information from the video signal, and a continuous mode in which there is no switching of the frame frequency during reproduction Depending on the user's selection, select one of the non-continuous modes that can cause frame frequency switching during playback. A mode setting step for setting the operation mode of the playback device; and when the playback device is set to the continuous mode, if the video signal to be played back is the first frame frequency signal, the first frame frequency signal is set to the first frame frequency. When the video signal to be reproduced is a second frame frequency signal, the computer is caused to execute a reproduction step of converting the frame frequency of the second frame frequency signal to the first frame frequency and outputting it. It is a feature.

  In order to achieve the above object, a playback method according to the present invention is a playback method incorporated in a playback device that outputs a video signal obtained by reading video information recorded on a recording medium to a display device, On the recording medium, accompanying information indicating whether the frame frequency of the video signal is the first frame frequency or the second frame frequency is recorded together with the video information, and the accompanying information is read from the recording medium. A video signal determination step for determining whether the video signal to be reproduced is the first frame frequency signal or the second frame frequency signal, a continuous mode in which the frame frequency is not switched during playback, and a frame during playback. One of the discontinuous modes in which frequency switching can occur is set as the operation mode of the playback device according to the user's selection If the video signal to be reproduced is the first frame frequency signal, the first frame frequency signal is output at the first frame frequency and reproduced when the playback device is set to the continuous mode. If the video signal is a second frame frequency signal, it has a reproduction step of converting the frame frequency of the second frame frequency signal into a first frame frequency and outputting it.

  When the user sets the operation mode to continuous mode without allowing the display to be interrupted, the video signal with a frame frequency of 24 Hz is converted to 60 Hz and output, so that the frame frequency does not change during playback and is displayed. There will be no interruption. When the user makes a positive willingness to change the operation mode of the playback device to the discontinuous mode, video output is performed at a frame frequency of 24 Hz, so even if the display device is interrupted, It becomes rare to develop a product complaint.

  In addition, the playback device allows the user to select a discontinuous mode in which a signal output with a frame frequency of 24 Hz is performed only when the display device that is the connection partner has both display capabilities. Can display only the frame frequency of 60 Hz, but there is no inconvenience when the user selects the discontinuous mode for executing the signal output of the frame frequency of 24 Hz.

Since such an inconvenience can be eliminated, a signal output with a frame frequency of 24 Hz can be fully exhibited, and the user can be attracted with high-quality video.
When playing a package as described above, the mode setting means accepts a selection of either a non-continuous mode or a continuous mode from a user via a graphics user interface, and the graphics user interface is a mixed type. When the video signal is output in the discontinuous mode, it is desirable to warn the user that the display on the display device may be interrupted.

Since the user is made aware of the possibility of interruption of reproduction when signals are mixed, the discontinuous mode is selected, so even if disturbance occurs during reproduction, it is rare that the interruption will develop into a product complaint. . When the playback device is placed in an environment that realizes playback at 24 frames / second, the capabilities of the playback device and the display device can be exhibited.
Here, the graphics user interface has two image states that are switched by a user operation, and the two image states are an image state that accepts selection of a continuous mode and an image state that accepts selection of a discontinuous mode. Preferably, the GUI generation unit generates the graphics user interface in an image state that accepts the selection of the continuous mode before receiving a user operation.

  By generating a graphics user interface that accepts the selection of continuous mode in the initial state, selection of discontinuous mode requires the user's active operation of switching the image state, so the display is interrupted. Well-known can be made more reliable. In addition, when the graphics user interface is displayed, even if the user does not confirm the details and performs the decision operation without changing the image state in response to the image display, the operation mode is set to the continuous mode. Therefore, the display is not interrupted and does not develop into a product complaint.

  Further, by using Clip information defined in the BD-ROM standard as accompanying information, the present invention can be implemented in a playback apparatus without modifying the data structure of the BD-ROM standard.

The best mode for carrying out the present invention will be described below with reference to the drawings.
(First embodiment)
First, among the implementation actions of the playback apparatus according to the present invention, the mode of use action will be described. FIG. 1 is a diagram showing a form of usage of the playback apparatus according to the present invention. In FIG. 1, the playback apparatus according to the present invention is a playback apparatus 200, which is used in a home theater system formed by a remote controller 300, a hybrid monitor 400, and a 60Hz dedicated monitor 500.

  The playback device 200 plays back the video signal recorded on the optical disc 1. Video output by the playback device includes an interlaced video signal of 60 fields / second (hereinafter referred to as a 60 Hz interlaced signal) and a progressive video signal of 24 frames / second (progressive video signal). This playback device has a digital output terminal, and sends these video signals to the hybrid monitor 400 and the 60 Hz dedicated monitor 500 via the HDMI connector.

The hybrid type monitor 400 can display a 60 Hz interlaced video signal and a progressive video signal.
The 60 Hz dedicated monitor 500 can display a 60 Hz interlaced video signal.
This completes the description of the act of using the playback apparatus according to the present invention.
Next, a description will be given of the form of production of the playback apparatus according to the present invention. The reproducing apparatus according to the present invention can be industrially produced based on the internal configuration diagram in FIG.

  FIG. 2 is a block diagram of the playback device in the first embodiment. In this figure, the reproduction apparatus includes an optical disc 1, an optical pickup 2, a motor 3, a demodulation circuit 4, a clip information reading circuit 5, a video demodulation circuit 6, a 24Hz-60Hz conversion circuit 7, a switch 8, a digital modulation circuit 9, and a terminal 10. , HDMI synchronization control unit 14, display capability determination unit 11, GUI generation unit 12, mode setting unit 13, and switch control circuit 15. Of these components, the portions from the demodulating circuit 4 to the switch control circuit 15 excluding the terminal 10 are integrated as one system LSI.

<Disk 1>
The disc 1 is a BD-ROM on which a video signal compressed by the MPEG2 system (ITU-T recommendation H.262 / ISO / IEC13818-2) is recorded. FIG. 3 shows the internal structure of the BD-ROM.
The BD-ROM is shown in the fourth level of the figure, and the tracks on the BD-ROM are shown in the third level. The track in this figure is drawn by extending the track formed in a spiral shape from the inner periphery to the outer periphery of the BD-ROM in the horizontal direction. This track includes a lead-in area, a volume area, and a lead-out area. The volume area in this figure has a layer model of a physical layer, a file system layer, and an application layer. When the application layer format (application format) of the BD-ROM is expressed using the directory structure, it becomes like the first level in the figure. In the first stage, the BD-ROM has a BDMV directory under the Root directory.

Under the BDMV directory, there are three subdirectories called a PLAYLIST directory, a CLIPINF directory, and a STREAM directory, and a file called INDEX.BDMV and a file called MovieObject.bdmv are arranged.
The STREAM directory is a directory that stores a file that is a video signal main body, and includes a file with an extension M2TS.

In the PLAYLIST directory, there are files with the extension MPLS.
In the CLIPINF directory, there is a file with the extension CLPI.
Hereinafter, these files will be described.

<AVClip>
First, a file with the extension .M2TS will be described. A file with the extension .M2TS stores an AVClip that encodes a video signal.

There are two types of video signals recorded on the disc 1. FIG. 4 is a diagram showing two types of video signals recorded on the optical disc 1.
The progressive video signal is a video signal whose source is a video signal picked up by a film. As shown in the 4-1 stage of FIG. 4, frames n, n + 1, n + 2 of 24 frames / second are used. , n + 3.

The 60 Hz interlaced video signal is mainly a signal picked up by a video camera, and a field appearing every 30 frames / second and 60 fields / second as shown in the 4-2 stage of FIG. It consists of odd, even, odd, even, odd, even, odd, even.
In the actual movie, in addition to the main part, cut scenes, interview videos, making videos, etc. are recorded, but these are divided into different types, such as progressive video signals and 60 Hz interlaced video signals, respectively. Most of them are. In addition, for the convenience of editing, there may be a mixture of progressive video signals and 60 Hz interlaced video signals in the main part of one movie. Therefore, in the reproduction of the optical disc 1, the progressive video signal and the 60 Hz interlaced video signal may be read in a mixed state.

<Clip information>
A file with the extension “CLPI” is Clip information corresponding one-to-one with each AVClip. FIG. 5 is a diagram showing the structure of Clip information. Because of the management information, the Clip information has information such as the resolution of the video signal in the AVClip, the scanning method, the frame rate, and the aspect ratio. FIG. 5 is a diagram showing the structure of Clip information. As shown on the left side of this drawing, Clip information includes “ProgramInfo”. ProgramInfo includes “StreamCodingInfo” as indicated by a dashed arrow pi1. A broken line pi2 in the figure closes up the internal structure of StreamCodingInfo. As shown in this figure, StreamCodingInfo is composed of “video_format” indicating the resolution and scanning method of the video signal included in the corresponding AVClip, “frame_rate” indicating the frame rate of the video signal, and “aspect_ratio” indicating the aspect ratio. Become.

Accordingly, by reading out the Clip information from the disc 1 and referring to the frame_rate, the playback device can know the type of the corresponding video signal prior to playback of the video signal.

<PlayList information>
A file with the extension “MPLS” is a file storing PlayList (PL) information. The PL information is information that defines a playlist with reference to the AVClip. FIG. 6 is a diagram showing the configuration of the PL information. As shown on the left side of the figure, the PL information is composed of “MainPath information”, “PLMark information”, and “SubPath information”.

  The MainPath information (MainPath ()) includes a plurality of pieces of PlayItem information (PlayItem ()) as indicated by a dashed arrow mp1. A PlayItem is a playback section defined by specifying In_Time and Out_Time on the AVClip time axis. By arranging a plurality of PlayItem information, a playlist (PL) consisting of a plurality of playback sections is defined. A broken line mp2 in the figure closes up the internal structure of the PlayItem information. As shown in the figure, the PlayItem information is composed of “Clip_information_file_name” indicating the corresponding AVClip, “In_time”, and “Out_time”.

Plural PlayItem information can be defined in the PL information, but the AVClip designated by each PlayItem information is defined by the BD-ROM standard so that the encoding conditions are constant throughout the entire playlist. Therefore, the video signal obtained by play list reproduction has the same frame frequency regardless of which AVClip is used.

<Movie Object>
MovieObject.bdmv stores Movie Object. FIG. 7 shows the structure of MovieObject.bdmv. As shown at the left end of the figure, MovieObject.bdmv is composed of “type_indicater” indicating a code string “MOBJ”, “version_number”, and “MovieObjects ()” which is one or more MovieObjects. A lead line vh1 in the figure closes up the internal structure of MovieObjects. MovieObjects () includes “length” that is its own data length, “number_of_mobjs” that is the number of MovieObjects included in itself, and “MovieObjects” that is number_of_mobjs MovieObjects. These number_of_mobjs MovieObjects are identified by an identifier mobj_id. A lead line vh2 in the drawing closes up the internal configuration of an arbitrary MovieObject [mobj_id] () specified by the identifier mobj_id.

  As shown in this leader line, when a MenuCall is made, the MovieObject “resume_intention_flag” indicating whether or not to resume playback after MenuCall, information “menu_call_mask” indicating whether or not to mask the MenuCall, title It consists of “title_search_flag” indicating whether to mask the search function, “number_of_navigation_command” which is the number of navigation commands, and number_of_navigation_command “navigation commands”.

The navigation command string is composed of command strings that realize conditional branching, setting of a status register in the playback device, acquisition of a setting value of the status register, and the like. The commands that can be described in Movie Object are shown below.

PlayPL command Format: PlayPL (first argument, second argument)
The first argument is a playlist number, which can specify a PL to be reproduced. The second argument can specify the playback start position using PlayItems included in the PL, arbitrary time in the PL, Chapter, and Mark.

PlayPLatPlayItem (), PlayPL function that specifies the playback start position on the PL time axis by PlayItem,
PlayPLatChapter (), a PlayPL function that specifies the playback start position on the PL time axis by Chapter
A PlayPL function in which a playback start position on the PL time axis is specified by time information is referred to as PlayPLatSpecified Time ().

JMP command Format: JMP argument
The JMP command is a branch in which the current dynamic scenario is discarded halfway (discard) and the branch destination dynamic scenario as an argument is executed. The JMP instruction format includes a direct reference that directly specifies a branch destination dynamic scenario and an indirect reference that indirectly refers to a branch destination dynamic scenario.

The description of the navigation command in the Movie Object is very similar to the description method of the navigation command in the DVD, so that the work of porting the disc content on the DVD to the BD-ROM can be performed efficiently. Regarding Movie Object, there is a prior art described in the following International Publication. Please refer to this International Publication for details.

International Publication No.W0 2004/074976

<Index.bdmv>
Index.bdmv is the file that is read first after the disc is inserted into the playback device, and includes a table that associates multiple titles that can be played back on the BD-ROM and objects that define the individual titles. It is. Hereinafter, types of titles that can be recorded on the BD-ROM will be described. Titles that can be recorded on the BD-ROM include “FirstPlayTitle”, “Top_menuTitle”, and “Title # 1, # 2, # 3”.

“FirstPlayTitle” plays the role of reproducing the dynamic trademark before loading the BD-ROM. With this FirstPlayTitle, it is possible to realize the custom of playing a dynamic trademark representing the creator and distributor of a movie work at the time of loading.
“Top_menuTitle” is a Title that reproduces the menu located at the top in the menu hierarchy in the BD-ROM.

“Title # 1, # 2, # 3” are titles corresponding to general movie works. INDEX.BDMV indicates the correspondence between titles such as “FirstPlayTitle”, “Top_menuTitle”, and “Title # 1, # 2, # 3” and individual MovieObjects.
FIG. 8 shows the structure of INDEX.BDMV. As shown in the figure, Index.bdmv includes Title information such as “FirstPlayTitle information”, “Top_menuTitle information”, “Title # 1 information”, “Title # 2 information”, and “Title # 3 information”. Each piece of Title information indicates a correspondence between a Title number and a MovieObject that defines the title. The above-described Title information can identify the MovieObject that defines the title, and the PlayList information to be reproduced can be derived from this MovieObject. This completes the explanation of Index.bdmv.

The details of Index.bdmv are described in the following international publications. For details, see this publication.
International Publication WO 2004/025651
This completes the description of the disk 1.

<Pickup 2, motor 3, demodulation circuit 4>
The pickup 2 converts the signal recorded on the disc 1 into an electrical signal.

The motor 3 rotates the disk 1 at a speed suitable for reproduction.
The demodulating circuit 4 demodulates the electric signal resulting from the conversion of the pickup 2 to obtain a bit string. The bit string is subjected to error correction and the like, and a compressed video signal and incidental information necessary for reproduction are output. The incidental information includes PlayList information, Clip information, and the like.

<Clip information reading circuit 5>
The Clip information reading circuit 5 reads the above-described Clip information from the output of the demodulation circuit 4, refers to the frame_rate of the Clip information, and determines whether the video signal reproduced from the disc 1 is a progressive video signal or 60 Hz interlaced. It is determined whether it is a video signal. This determination result is input to the switch control circuit 15.

The discrimination by the clip information reading circuit 5 is executed prior to AVClip playback when the playback target playlist is switched by a command or the like in the Movie Object.

<Video demodulation circuit 6>
The video demodulation circuit 6 demodulates the compressed video signal output from the demodulation circuit 4 to obtain a digital video signal. The digital video signal demodulated by the video demodulation circuit 6 is input to the contact a of the switch 8 and the 24 Hz-60 Hz conversion circuit 7.

<24Hz-60Hz conversion circuit 7>
The 24 Hz-60 Hz conversion circuit 7 converts the progressive video signal recorded at 24 frames / second into a 60 Hz interlace video signal and outputs it to the contact b of the switch 8. Steps 4-3 and 4-4 in FIG. 4 show the processing procedure of the 24 Hz-60 Hz conversion circuit 7. The 24 Hz-60 Hz conversion circuit 7 converts frames n and n + 2 among the frames of the progressive video signal as shown in the stage 4-3 in FIG. 4 into three fields. Frames n + 1 and n + 3 are converted into two fields. As a result, a 60 Hz interlaced video signal as shown in stage 4-4 is obtained.

<Switch 8>
The switch 8 selectively outputs the output of the video demodulation circuit 6 and the output of the 24 Hz-60 Hz conversion circuit 7 to the digital modulation circuit 9 by connecting to either the contact a or contact b.

<Digital modulation circuit 9>
The digital modulation circuit 9 modulates the digital video signal in the HDMI format for any one of the 24 Hz progressive video signal and 60 Hz interlaced video signal input from the switch 8, and the modulation result is sent to the monitor 400 or 500. Output. As a result, a video signal is output.

<Terminal 10>
The terminal 10 is a terminal conforming to the HDMI standard, and includes a digitally modulated video signal transmission path and a serial for intercommunication defined by both the VESA / E-DDC and EIA / CEA 861-B standards. A transmission line is included. Monitors 400 and 500 are connected to the terminal 10. There is a ROM inside the monitor, and information (EDID) about the displayable video standard of the monitor is stored in the ROM. Therefore, the displayable video standard stored in this ROM is stored via the serial transmission path described above. Information can be read out.

<Display capability determination unit 11>
The display capability determination unit 11 extracts “information relating to the monitor displayable video standard” from the ROM existing in the monitor via the serial transmission path described above, and monitors the connection partner based on the displayable video standard information. Is a hybrid monitor 400 or a 60 Hz dedicated monitor 500. Then, the determination result is notified to the switch control circuit 15 and the mode setting unit 13.

<GUI generator 12>
The GUI generation unit 12 generates a graphics user interface (GUI) described using OSD (On Screen Display) graphics or BML (Broadcast Markup Languege), outputs the generated graphics user interface (GUI) to the hybrid monitor 400, and displays it on the hybrid monitor 400.

<Mode setting unit 13>
The mode setting unit 13 causes the GUI generation unit 12 to generate a GUI for receiving the mode setting, and causes the hybrid monitor 400 to output the GUI. FIG. 9 is a diagram illustrating a GUI generated by the GUI generation unit 12. The buttons in this drawing accept settings of the image quality priority mode and the continuity priority mode, and have states such as a normal state, a focus state, and an active state.

The “continuity priority mode” is a mode in which there is no change in the frame frequency during playback.
The “image quality priority mode” is a discontinuous mode in which a change in frame frequency during playback can occur.

A change in the frame frequency in the image quality priority mode will be described. FIG. 10 is a diagram illustrating an operation at a change point between the progressive video signal and the 60 Hz interlaced video signal. In general, in the case of a movie material in which the main video signal recorded on the disc 1 is filmed, a progressive video signal and a 60 Hz interlaced video signal are displayed by switching the playlist, as shown in FIG. It may change. Such switching seems to be combined with the making of the main part, which consists of frames n, n + 1, n + 5, n + 6 at 24 frames per second, with a 60Hz interlaced video signal. Occurs when playing a MovieObject. Stage 10-2 shows an output to the digital modulation circuit 9 when the MovieObject is reproduced.

   With MovieObject # 1, the progressive video signal PL # 1 is switched to the 60Hz interlaced video signal PL # 2, and then the progressive video signal PL # 3 is switched again, so progressive video signal → interlaced video signal, interlaced video Resynchronization with the monitor occurs when the signal → progressive video signal changes. Therefore, it is inevitable that the video output stops during the resynchronization.

Although this change occurs, the main video can be reproduced at a display frequency of 24 Hz, so that the movement of a person or the like in a movie filmed on film can be reproduced beautifully. “Image quality priority” in the image quality priority mode means that the above-described movement can be clearly reproduced by display at a display frequency of 24 Hz.
In FIG. 9, the user can switch the button to be focused by pressing the left and right keys on the remote controller, and the mode setting unit 13 changes the button to the currently focused button in response to pressing of the Enter key. The corresponding mode is the current mode of the playback device. The greatest feature of this GUI is that it allows the user to understand the disadvantages of setting the playback device to the image quality priority mode. The warning “In the image quality priority mode, playback may be interrupted depending on the type of video” in the figure represents a demerit when the image quality priority mode is entered. The continuity priority mode is set to the focus state as a default setting after allowing the user to understand the disadvantages of setting the image quality priority mode. As a result, when the progressive video signal and the interless video signal are mixed, the playback device is set to the image quality priority mode after allowing the user to understand the disadvantage that the display is interrupted. Even if playback disturbance occurs due to playback of mixed signals, it does not develop into a product complaint.

<HDMI synchronization control unit 14>
The HDMI synchronization control unit 14 is a functional block that controls synchronization with the monitor in the HDMI video signal transmission path, and according to the number of frames notified from the switch control circuit 15 when the image quality priority mode is set. Perform resynchronization with the monitor.

<Switch control circuit 15>
The switch control circuit 15 controls the switch 8 according to the combination of the frame frequency of the AVClip recorded on the optical disc 1, the type of monitor to which the playback device is connected, and the mode setting in the playback device, In accordance with this control, the frame frequency notified from the clip information reading circuit 5 is notified to the HDMI synchronization control unit 14. Hereinafter, details of the switch control in the switch control circuit 15 will be described.

<Details of Switch Control Circuit 15>
(When the connection partner is the hybrid monitor 400 and is in the image quality priority mode)
FIG. 11 shows the output of the video demodulation circuit 6 and the switch control by the switch control circuit 15 when the playback device is connected to the hybrid monitor 400 and the status setting of the playback device is the image quality priority mode. FIG.

Stage 11-1 in the figure shows a progressive video signal that is output through to the contact a. Stage 11-2 shows a 60 Hz interlaced video signal that is output through to the contact a. According to this figure, when the input is 60Hz interlace video signal, 60Hz interlace video signal is output,
When the input is a progressive video signal, it can be seen that the progressive video signal is output.

Stage 11-3 shows switch control by the switch control circuit 15 when the connection partner is the hybrid monitor 400 and the image quality priority mode is set.
Regardless of the video signal, the switch control circuit 15 sets the switch 8 to the a contact, and outputs the output of the video demodulation circuit 6 to the digital modulation circuit 9 as a through output.
Therefore, when the image quality priority mode is set and the video signal is a progressive video signal, a video signal of 24 frames / second is output. When the video signal is an interlaced video signal, a 60 Hz interlaced video signal is output by setting the switch 8 to the a contact.

<Details of Switch Control Circuit 15 Part 2>
(Switching in continuity priority mode)
FIG. 12 shows the input / output of the video demodulation circuit 6 and the 24 Hz-60 Hz conversion circuit 7 and the switch control circuit when the connection partner of the playback apparatus is the hybrid monitor 400 and the mode setting of the playback apparatus is the continuity priority mode. FIG. 15 is a diagram illustrating the switch control according to 15 in association with the switch control.

  The 12-1 and 12-2 stages in this figure indicate the input and output of the 24 Hz-60 Hz conversion circuit 7 when the input signal is a progressive video signal. At this time, the 24 Hz-60 Hz conversion circuit 7 converts the original 24 frames / second video of the progressive video signal as shown in the stage 12-1 of FIG. 12 into 2 fields and 3 fields alternately. As a result, as shown in stage 12-2, a 60 Hz interlaced video signal is obtained. Stage 12-3 shows a 60 Hz interlaced video signal that is output through to the contact a. Stage 12-4 shows switch control by the switch control circuit 15 when the input / output of the 24 Hz-60 Hz conversion circuit 7 is shown in 12-1 to 12-2.

When it is determined that the video signal is a 24 Hz progressive video signal, the switch 8 is set to the b contact, and the output of the 24 Hz-60 Hz conversion circuit 7 is output to the digital modulation circuit 9.
If the video signal is a 60 Hz interlaced video signal, the switch is set to contact a, and the output of the video demodulation circuit 6 is output to the digital modulation circuit 9. Therefore, a video signal of 60 fields / second is always sent to the digital modulation circuit 9.

<Details of Switch Control Circuit 15 Part 3>
(When the playback device is connected to a 60Hz monitor 500)
FIG. 13 is a diagram showing the input / output of the video demodulation circuit 6 and the 24 Hz-60 Hz conversion circuit 7 and the switch control by the switch control circuit 15 when the playback device is connected to the 60 Hz dedicated monitor 500. .

  The 13-1 stage and 13-2 stage in this figure show the input / output of the 24 Hz-60 Hz conversion circuit 7 when the input signal is a progressive video signal. At this time, the 24 Hz-60 Hz conversion circuit 7 converts the original 24 frames / second image of the progressive image signal in stage 13-1 in FIG. 13 into 2 fields and 3 fields alternately. As a result, as shown in stage 13-2, a signal of 60 fields / second is obtained. Stage 13-3 shows a 60 Hz interlaced video signal that is output through to the contact a. Stage 13-4 shows switch control by the switch control circuit 15 when the input / output of the 24 Hz-60 Hz conversion circuit 7 is shown in 13-1 to 13-2.

When it is determined that the video signal is a progressive video signal, the switch 8 is set to the b contact, and the output of the 24 Hz-60 Hz conversion circuit 7 is output to the digital modulation circuit 9.
If the video signal is a 60 Hz interlaced video signal, the switch is set to contact a, and the output of the video demodulation circuit 6 is output to the digital modulation circuit 9. Therefore, a video signal of 60 fields / second is always sent to the digital modulation circuit 9.

Therefore, in the continuity priority mode, even when the video signal switches between the progressive video signal and the 60 Hz interlaced video signal, the video signal of 60 fields / second continues to be output. There is no need for synchronization and video signal output does not stop.
Therefore, the user can select a video output suitable for the intention by selecting the image quality priority mode when priority is given to playback and selecting the continuity priority mode when priority is given to video continuity. .

  Hereinafter, software implementation of the clip information reading circuit 5, the display capability determination unit 11, the GUI generation unit 12, the mode setting unit 13, and the switch control circuit 15 will be described. The clip information reading circuit 5, the display capability determination unit 11, the GUI generation unit 12, the mode setting unit 13, and the switch control circuit 15 create a program that performs the processing procedure of FIGS. It can be implemented in a playback device.

  FIG. 14 is a flowchart showing a procedure of overall control of the playback device by the clip information reading circuit 5, the display capability determination unit 11, the GUI generation unit 12, the mode setting unit 13, and the switch control circuit 15. In this figure, when the playback apparatus is activated, the process proceeds to a loop process consisting of step S1. This step S1 is a determination as to whether or not a connection with the monitor has been made, and this loop process proceeds to step S2 if a connection with the monitor has been made. Step S2 is processing for extracting information relating to the displayable video standard from the monitor through the serial transmission path for mutual communication of the HDMI standard. Step S3 is a determination step for switching whether to execute the processing of step S4 to step S12 or the processing of step S13 to step S17 in FIG. 15 based on the information relating to the extracted displayable video standard.

If the monitor as the connection partner only allows 60 Hz scanning, the process proceeds to the flowchart of FIG. If the connection partner monitor is capable of both 24 Hz scanning and 60 Hz scanning, the process proceeds to steps S4 to S12.
Step S4 is a step of accepting the setting of either the image quality priority mode or the continuity priority mode when both scans are possible.

Step S5 is a determination as to whether the playback device is set to the image quality priority mode or the continuity priority mode. When the playback device is set to the continuity priority mode, the process proceeds to the process of FIG. If it is the image quality priority mode, the process proceeds to steps S6 to S12.
Steps S6 to S12 execute a process of switching the switch 8 to the contact a (step S10) and a process of switching the switch 8 to the contact a (step S12) according to the execution results of the steps S6 to S8. .

Whether to execute step S10 or step S12 depends on the determination result of step S8.
Step S6 prior to step S7 and step S8 is a determination as to whether or not the playback target is switched to a new playlist, and this loop process proceeds to step S7 when the playback target playlist is switched.

Step S7 is a process of reading the clip information of the AVClip defined at the top in the new playlist for which switching of playback has been determined in step S6.
Step S8 is a determination step for determining whether or not frame_rate defined in the read Clip information indicates 24 Hz. If it indicates 24 Hz, it is determined in step S9 that the frame frequency of the video signal is 24 Hz. The HDMI synchronization control unit 14 is notified, and the process proceeds to step S10. If frame_rate indicates 60 Hz, the HDMI synchronization control unit 14 is notified in step S11 that the frame frequency of the video signal is 60 Hz, and step S12 is executed. Thereafter, as long as the input of the video signal is continued, the processes in steps S6 to S12 are repeated. The above is the flowchart of FIG.

FIG. 15 is a flowchart showing the processing procedure of the playback device when the connection partner is the 60 Hz dedicated monitor 500 or when the mode setting of the playback device is the continuity priority mode.
This flowchart executes processing for switching the switch 8 to the b contact (step S16) and processing for switching the switch 8 to the a contact (step S17) according to the execution results of the steps S13 to S15.

Which of step S16 and step S17 is executed depends on the determination result of step S15.
Step S13 prior to step S14 and step S15 is a determination as to whether or not the playback target is switched to a new playlist, and this loop process proceeds to step S14 when the playback target playlist is switched.

Step S14 is a process of reading the clip information of the AVClip defined at the top in the new playlist for which switching of playback has been determined in step S13.
Step S14 is a determination step for determining whether or not frame_rate defined in the read Clip information indicates 24 Hz. If it indicates 24 Hz, step S16 is executed. When frame_rate indicates 60 Hz, step S17 is executed. Thereafter, as long as the input of the video signal is continued, the processes in steps S13 to S17 are repeated. The above is the flowchart of FIG.

  As described above, according to the present embodiment, the difference in the frame frequency of the video signal being reproduced and the difference in the displayable frame frequency of the connected monitor are detected, and the frame frequency of the output video signal is determined accordingly. It can be changed, and the user can select whether to display the image quality with priority or whether to display it without interruption of the image, so it is possible to select the displayable frame frequency of the monitor and the frame of the video signal. Depending on the combination of frequencies, there is an advantage that an image is not output, an optimum image quality cannot be achieved, and video output is not interrupted.

Note that the playback apparatus 200 according to the present embodiment warns the user that the image is interrupted when the frequency is switched when the image quality priority mode is set, on the GUI for accepting the mode setting, and informs the user. For this reason, even if reproduction interruptions due to frequency switching occur, the user can easily estimate the cause and deal with it.
However, after setting the operation mode to the image quality priority mode, the user may forget the above warning if only the optical disc that does not include the progressive video signal is viewed for a long time. In such a situation, when a movie breakage, etc., in which 60Hz interlace signal and progressive video signal are mixed for the first time in a long time, and playback interruption occurs due to frequency switching, the user can not estimate the cause and deal with it May cause confusion.

Hereinafter, a description will be given of a modification in which a GUI for accepting mode setting can be displayed even when the user cannot estimate the cause when a playback interruption occurs due to frequency switching. This modification can be implemented in the playback apparatus by creating a program that performs the processing procedure of FIGS. 15 and 16 and causing the CPU to execute the program.
In FIG. 16, a loop process including steps S21 to S22 is executed during the reproduction process. This step S21 is a determination of whether or not the help key provided on the remote controller 300 has been pressed. If the help key is pressed, the process proceeds to the determination of step S22. In the determination in step S22, the operation mode of the device itself and the operation history of the HDMI synchronization control unit 14 are verified.

  If the operation mode of the own apparatus is the image quality priority mode, and HDMI resynchronization accompanying the switching of the frame frequency is executed in the HDMI synchronization control unit 14 for 10 seconds before the help key is pressed (step S22). : Yes), it is presumed that the user pressed the help key without knowing the cause of the reproduction interruption in the situation where the reproduction interruption accompanied with the frame frequency switching occurred. In such a case, the reproduction process is interrupted (step S23), and a GUI for accepting the mode setting shown in FIG. 9 is generated by the GUI generation unit 12, and either the image quality priority mode or the continuity priority mode is set. Is received (step S24). Accordingly, since the image quality priority mode is set, a warning that the image is interrupted when the frequency is switched and a method for solving the warning are provided to the user in a timely manner.

After S25, the same process as the process after step S5 shown in FIG. 14 and the process shown in FIG. 15 are executed, and the reproduction process is resumed.
By providing an opportunity for mode setting as shown in the above modification, the above problem can be addressed.

(Second Embodiment)
The second embodiment is an embodiment assuming that the monitor is a multi-frame monitor. The multi-frame type monitor means a monitor that performs display at the scanning frequency at the time of display instructed from the playback device. In this embodiment, the multi-frame type monitor is 48 Hz that is an integer multiple of 24 frames / second. The video is reproduced by scanning. The film material is suitable for display at 24 frames / second as shown in the first embodiment, but flicker may occur at 24 frames / second. In order to avoid this kind of flicker, movie projectors in the movie theater project light twice for each frame. Therefore, if the playback apparatus performs video display at 48 frames / second in this embodiment, the quality at the time of display conforms to the quality seen in a movie theater.

Hereinafter, the internal configuration of the playback apparatus according to the second embodiment will be described. FIG. 17 is a diagram illustrating an internal configuration of a playback apparatus according to the second embodiment. As shown in the figure, in the playback apparatus according to the second embodiment, a display frequency instruction unit 20 and a 24 Hz-48 Hz conversion circuit 21 are newly added. Further, since these components are added, the display capability determination unit 11 and the switch control circuit 15 perform processing unique to the second embodiment as described below. The improvements and new components will be described above.

<Improvement of Display Capability Determination Unit 11 in Second Embodiment>
The display capability determination unit 11 extracts “information relating to the monitor displayable video standard” from the ROM existing in the monitor via the serial transmission path described above, and monitors the connection partner based on the displayable video standard information. Is a multi-frame type monitor.

<Display frequency instruction unit 20>
When the display capability determination unit 11 determines that the connection partner monitor is a multi-frame monitor, the display frequency instruction unit 20 displays the scan frequency to be displayed via HDMI as the connection partner display. Notify the device. The “scanning frequency to be displayed” here is the above-mentioned 48 frames / second, and after the display device is instructed to display at 48 frames / second, in the image quality priority mode, 48 frames / second. The signal output in seconds is performed by the 24 Hz-48 Hz conversion circuit 21.

<24Hz-48Hz conversion circuit 21>
The 24 Hz-48 Hz conversion circuit 21 converts the progressive video signal output from the video demodulation circuit 6 into 48 frames / second. FIG. 18 is a diagram showing the input / output of the 24 Hz-48 Hz conversion circuit 21. In the figure, stage 17-1 indicates an input signal (progressive video signal) to the 24Hz-48Hz conversion circuit 21, and stage 17-2 indicates an output signal from the 24Hz-48Hz conversion circuit 21. Referring to this figure, frames n, n + 1, n + 2 constituting a progressive video signal such as stage 17-1 to frames n, n, n + 1, n + 1, n + 2, n + 2 It can be seen that is generated.

<Improvement of Switch Control Circuit 15 in Second Embodiment>
The switch control circuit 15 performs processing unique to the second embodiment when the connection partner is a multi-frame monitor and is in the image quality priority mode.

When the playback apparatus is set to the image quality priority mode, the switch control circuit 15 outputs the 48 frame / second video signal output from the 24 Hz-48 Hz conversion circuit 21 to the monitor 400 if the input signal is a progressive video signal. Therefore, as shown in FIG. 19, control is performed so that the switch 8 is switched.
FIG. 19 shows the correspondence between the input / output of the 24 Hz-48 Hz conversion circuit 21 and the switch control by the switch control circuit 15 when the playback device is connected to a multi-frame monitor and the playback device status setting is the image quality priority mode. FIG. 18-1 and 18-2 in the drawing indicate input / output in the 24 Hz-48 Hz conversion circuit 21. Stage 18-3 shows the output of the video demodulation circuit 6 when a 60 Hz interlace video signal is input. According to this figure, when the input is a 60 Hz interlaced video signal, a 60 Hz interlaced video signal is output, and when the input is a progressive video signal, a 48 Hz progressive video signal is displayed as shown in stage 18-2. It can be seen that is output.

The 18-4 stage indicates switch control by the switch control circuit 15 when the input / output of the 24 Hz-48 Hz conversion circuit 21 is 18-1 stage to 18-2 stage.
When it is determined that the video signal is a progressive video signal, the switch control circuit 15 sets the switch 8 to the c contact, and outputs the output of the 24 Hz-48 Hz conversion circuit 21 to the digital modulation circuit 9.

  When it is determined that the video signal is a 60 Hz interlaced video signal, the switch control circuit 15 sets the switch 8 to the “a” contact, and outputs the output of the video demodulation circuit 6 to the digital modulation circuit 9. Accordingly, when the image quality priority mode is set and the video signal is a progressive video signal, a video signal of 48 frames / second is output. When the video signal is a 60 Hz interlaced video signal, the 60 Hz interlaced video signal is output by setting the switch 8 to the c contact.

  A change in the frame frequency of the video signal output in the image quality priority mode will be described. FIG. 20 is a diagram illustrating an operation when the progressive video signal and the interlace video signal are changed. In general, in the case of a movie material in which the video signal of the main part recorded on the disc 1 is filmed, when the play list to be reproduced is switched, the progressive video signal and the 60 Hz interlace are displayed as shown in FIG. The video signal may be switched. Switching is based on a MovieObject that is composed of a main frame composed of frames n, n + 1, n + 5, and n + 6 of 24 frames / second combined with a making composed of 60Hz interlaced video signals. Occurs during playback.

In MovieObject # 19 shown in the figure, the progressive video signal PL # 19-1 is switched from the PL # 19-1 of the progressive video signal to the PL # 19-2 of the 60 Hz interlaced video signal at the change point t1. Switch to 19-3.
The clip information reading circuit 5 reads the clip information at the change points t1 and t2, and the switch is switched from the c contact to the a contact and then to the c contact again, so that the output is shown in the stage 19-2. The video signal changes from a 48 Hz progressive video signal to a 60 Hz interlaced video signal, and then changes again to a 48 Hz progressive video signal. Therefore, the video is interrupted at the change point.

Therefore, even when the playback device outputs at 48 frames / second, the processing of the first embodiment is necessary. That is, when the monitor to be connected is a multi-frame, the mode setting unit 13 displays the GUI on the GUI generation unit 12, and when the user gives a positive response despite the warning shown in FIG. It is necessary to output frames / second.
As described above, according to the present embodiment, the connected display device can display at 48 frames / second so that the user can enjoy the reproduction quality like a movie theater. Even if the display is interrupted when switching between the 48 Hz progressive video signal and the 60 Hz interlaced video signal as the video signal, it is not necessary to develop a product complaint.

(Third embodiment)
As in the second embodiment, the third embodiment is an embodiment assuming that the monitor is a multi-frame type. The multi-frame type monitor means a monitor that performs display at the scanning frequency at the time of display instructed from the playback device. In this embodiment, the monitor is scanned at 72 Hz, which is an integer multiple of 24 frames / second. Play video.

Hereinafter, the internal configuration of the playback apparatus according to the third embodiment will be described. FIG. 21 is a diagram illustrating an internal configuration of a playback apparatus according to the third embodiment. This figure is based on the internal configuration of the playback apparatus according to the second embodiment shown in FIG. Compared to FIG. 17, the difference is that the playback apparatus according to the third embodiment is different in that the 24 Hz-48 Hz conversion circuit 21 is replaced with a 24 Hz-72 Hz conversion circuit 24. Since these additions / improvements exist, the display capability determination unit 11 and the switch control circuit 15 perform processing specific to the third embodiment as described below. The improvements and new components will be described above.

<Improvement of Display Capability Determination Unit 11 in Third Embodiment>
The display capability determination unit 11 extracts “information relating to the monitor displayable video standard” from the ROM existing in the monitor via the serial transmission path described above, and monitors the connection partner based on the displayable video standard information. Is a multi-frame type monitor.

<Display frequency instruction unit 23>
When the display capability determination unit 11 determines that the connection partner monitor is a multi-frame monitor, the display frequency instruction unit 23 sets 72 frames / second, which is a scanning frequency to be displayed, via HDMI. , Notify the display device as the connection partner. After instructing the display device to display at 72 frames / second, the 24 Hz-72 Hz conversion circuit 24 outputs a signal at 72 frames / second in the image quality priority mode.

<24Hz-72Hz conversion circuit 24>
The 24 Hz-72 Hz conversion circuit 24 converts the progressive video signal output from the video demodulation circuit 6 into 72 frames / second. FIG. 22 is a diagram showing the input / output of the 24 Hz-72 Hz conversion circuit 24. In the figure, stage 21-1 indicates an input signal (progressive video signal) to the 24 Hz-72 Hz conversion circuit 24, and stage 21-2 indicates an output signal from the 24 Hz-72 Hz conversion circuit 24. Referring to this figure, frames n, n + 1, n + 2 constituting a progressive video signal such as stage 21-1 to frames n, n, n, n + 1, n + 1, n + 1, n It can be seen that + 2, n + 2, n + 2 are generated.

This completes the description of the 24 Hz-72 Hz conversion circuit 24. Since the 24 Hz-48 Hz conversion circuit 21 is replaced with the 24 Hz-72 Hz conversion circuit 24, the switch control circuit 15 executes the following switch switching.

<Improvement of switch control circuit 15>
The switch control circuit 15 performs processing unique to the third embodiment when the connection partner is the hybrid monitor 400 and is in the image quality priority mode.

The switch control circuit 15 controls to switch the switch 8 as shown in the 21-3 stage in FIG. 22 in the third embodiment. Stage 21-3 shows switch control by the switch control circuit 15 according to the third embodiment.
When the playback device is set to the image quality priority mode and it is determined that the input video signal is a progressive video signal, the switch control circuit 15 sets the switch 8 to the c contact, and the 24 Hz-72 Hz conversion circuit. 24 outputs to the digital modulation circuit 9. As a result, a video signal of 72 frames / second is output to the monitor.

When the playback apparatus is set to the image quality priority mode and the input video signal is a 60 Hz interlaced video signal, the switch 8 is set to the a contact and the output of the video demodulation circuit 6 is output to the digital modulation circuit 9. .
As described above, according to the present embodiment, the connected display device can perform display in 72 frames, and an interlaced video signal is mixed with a progressive video signal as a video signal. If there is a display disorder or interruption, it is not necessary to develop a product complaint.

(Remarks)
As mentioned above, although the best embodiment which an applicant can know was demonstrated at the time of the application of this application, about the technical topic shown below, a further improvement and change implementation can be added. It should be noted that whether or not to make these improvements / changes is arbitrary and depends on the intention of the practitioner.

(Realization of control procedure)
Since the control procedure described with reference to the flowcharts in each embodiment and the control procedure using functional components are specifically realized using hardware resources, the technical idea using the laws of nature is used. Satisfaction requirements for "invention of the program" even if it is a creation.
-Production form of the program according to the present invention The program according to the present invention can be created as follows. First, a software developer uses a programming language to write a source program that implements each flowchart and functional components. In this description, the software developer describes a source program that embodies each flowchart and functional components using a class structure, a variable, an array variable, and an external function call according to the syntax of the programming language.

The described source program is given to the compiler as a file. The compiler translates these source programs to generate an object program.
Translation by the compiler consists of processes such as syntax analysis, optimization, resource allocation, and code generation. In the syntax analysis, lexical analysis, syntax analysis, and semantic analysis of the source program are performed, and the source program is converted into an intermediate program. In the optimization, operations such as basic block formation, control flow analysis, and data flow analysis are performed on the intermediate program. In the resource allocation, in order to adapt to the instruction set of the target processor, a variable in the intermediate program is allocated to a register or memory of the processor of the target processor. In code generation, each intermediate instruction in the intermediate program is converted into a program code to obtain an object program.

  The generated object program is composed of one or more program codes that cause a computer to execute each step of the flowcharts shown in the embodiments and individual procedures of functional components. Here, there are various kinds of program codes such as a processor native code and JAVA (registered trademark) bytecode. There are various modes for realizing each step by the program code. When each step can be realized by using an external function, a call statement that calls the external function becomes a program code. In addition, a program code that realizes one step may belong to different object programs. In a RISC processor in which instruction types are restricted, each step of the flowchart may be realized by combining arithmetic operation instructions, logical operation instructions, branch instructions, and the like.

When object programs are generated, the programmer activates the linker for them. The linker allocates these object programs and related library programs to a memory space, and combines them into one to generate a load module. The load module generated in this way is premised on reading by the computer, and causes the computer to execute the processing procedure and the processing procedure of the functional component shown in each flowchart. Through the above processing, the program according to the present invention can be created.

-Usage form of the program according to the present invention The program according to the present invention can be used as follows.

(i) Use as an embedded program When the program according to the present invention is used as an embedded program, a load module corresponding to the program is stored in an instruction ROM together with a basic input / output program (BIOS) and various middleware (operation system). Write. By incorporating such an instruction ROM into the control unit and causing the CPU to execute it, the program according to the present invention can be used as a control program for the playback apparatus.

(ii) Use as an application When the playback device is a model with a built-in hard disk, the basic input / output program (BIOS) is built into the instruction ROM, and various middleware (operation system) is preinstalled on the hard disk. Yes. Also, a boot ROM for starting the system from the hard disk is provided in the playback device.

  In this case, only the load module is supplied to the playback device via a portable recording medium or network, and is installed on the hard disk as one application. Then, the playback device performs bootstrap using the boot ROM, starts the operation system, causes the CPU to execute the application as one application, and uses the program according to the present invention.

Since the hard disk model playback apparatus can use the program of the present invention as one application, the program according to the present invention can be transferred, lent or supplied through a network.

(Realization of demodulation circuit 4 to switch control circuit 15)
Each of the demodulation circuit 4 to the switch control circuit 15 shown in each embodiment can be realized as one system LSI. Further, the demodulation circuit 4 to the switch control circuit 15 can be realized as one system LSI.

The system LSI is a package in which a bare chip is mounted on a high-density substrate and packaged. A system LSI that includes a plurality of bare chips mounted on a high-density substrate and packaged to give the bare chip an external structure like a single LSI is also included in system LSIs (such systems LSI is called a multichip module.)
Focusing on the type of package, there are two types of system LSIs: QFP (Quad Flood Array) and PGA (Pin Grid Array). QFP is a system LSI with pins attached to the four sides of the package. The PGA is a system LSI with many pins attached to the entire bottom surface.

These pins serve as an interface with other circuits. Since pins in the system LSI have such an interface role, by connecting other circuits to these pins in the system LSI, the system LSI plays a role as the core of the playback device.
The bare chip packaged in the system LSI includes a “front end unit”, a “back end unit”, and a “digital processing unit”. The “front end part” is a part for digitizing an analog signal, and the “back end part” is a part for outputting the data obtained as a result of digital processing in an analog form.

Each component shown as an internal configuration diagram in each embodiment is mounted in this digital processing unit.
As described above in “Use as Embedded Program”, a load module corresponding to a program, a basic input / output program (BIOS), and various middleware (operation system) are written in the instruction ROM. In this embodiment, since the part of the load module corresponding to this program was created in particular, the system LSI according to the present invention can be produced by packaging the instruction ROM storing the load module corresponding to the program as a bare chip. it can.

  For specific implementation, SoC implementation or SiP implementation can be used. SoC (System on chip) mounting is a technology that burns multiple circuits on a single chip. SiP (System in Package) mounting is a technology in which multiple chips are made into one package with resin or the like. Through the above process, the system LSI according to the present invention can be made based on the internal configuration diagram of the playback apparatus shown in each embodiment.

The integrated circuit generated as described above may be called IC, LSI, super LSI, or ultra LSI depending on the degree of integration.
Furthermore, some or all of the components of each playback device may be configured as one chip. The circuit integration is not limited to the above-described SoC mounting and SiP mounting, and may be realized by a dedicated circuit or a general-purpose process. It is conceivable to use a programmable gate array (FPGA) that can be programmed after manufacturing the LSI and a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI. Furthermore, if integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative technology, it is naturally also possible to carry out function block integration using this technology. For example, biotechnology can be applied.

(Type of recording medium)
In the first embodiment, the disk 1 as a recording medium is described as an example of a read-only optical disk, but the recording method, the form of the recording medium, and the like are not limited. The optical pickup 2 and the motor 3 are also necessary because they are described on the assumption that the disk 1 is used. However, if the type and form of the recording medium is another configuration such as a semiconductor memory card, it is necessary. As the recording medium driving means and the signal recording / reproducing means for the recording medium, those suitable for the recording medium are used.

(Frame frequency)
In the first to third embodiments, the case where the output video signal frequency is an integral multiple of 24 Hz and 60 Hz has been described. However, the present invention can also be applied to cases where the output video signal frequency has other values. is there. For example, the effect of the present invention can be similarly exhibited even in an integer multiple of 24000/1001 Hz and 60000/1001 Hz, which are frequently used in actual video equipment.

(Mode setting)
In the first to third embodiments, the case where the mode setting is received via the GUI has been described. However, the present invention can also be applied to the case where another method is used to receive the mode setting. For example, the playback apparatus may be provided with a microphone and voice analysis means, and may be configured to accept mode settings by using voice navigation and voice input instead of the GUI.

  The effect of the present invention is the same even when a button for switching between the image quality priority mode and the continuity priority mode is arranged on the operation panel on the front surface of the playback device, and the mode setting is changed at an arbitrary timing by operating the button. It can be demonstrated to. Similarly, the present invention can be implemented as a configuration in which the image quality priority mode and the continuity priority mode are switched by a dip switch.

  Since the internal configuration of the playback apparatus according to the present invention is disclosed in the above-described embodiment, and it is clear that the playback device is mass-produced based on this internal configuration, it can be industrially utilized in qualities. Therefore, the playback apparatus according to the present invention has industrial applicability.

The figure which shows the form about the usage act of the reproducing | regenerating apparatus which concerns on this invention The block diagram of the reproducing | regenerating apparatus in 1st Embodiment Diagram showing the internal structure of the BD-ROM The figure which shows two types of video signals recorded on the optical disk 1 Diagram showing the structure of Clip information Diagram showing the structure of PL information Diagram showing the structure of MovieObject.bdmv Diagram showing the structure of INDEX.BDMV The figure which shows GUI produced | generated by the GUI production | generation part 12. Diagram showing the change point operation of progressive video signal and 60Hz interlace video signal FIG. 5 is a diagram showing the input / output of the video demodulation circuit 6 and the switch control by the switch control circuit 15 when the playback apparatus is connected to the hybrid monitor 400 and the playback apparatus status setting is the image quality priority mode. When the playback device is connected to the hybrid monitor 400 and the mode setting of the playback device is the continuity priority mode, input / output of the video demodulation circuit 6 and 24 Hz-60 Hz conversion circuit 7 and switch control by the switch control circuit 15 Figure showing in association with The figure which shows the input / output of the video demodulation circuit 6 and the 24 Hz-60 Hz conversion circuit 7 in association with the switch control by the switch control circuit 15 when the connection partner of the playback device is the 60 Hz dedicated monitor 500 The flowchart which shows the procedure of the whole control of the reproducing | regenerating apparatus by the Clip information reading circuit 5, the display capability determination part 11, the GUI production | generation part 12, the mode setting part 13, and the switch control circuit 15. The flowchart which shows the processing procedure of the reproducing | regenerating apparatus when the connection other party is the 60Hz exclusive monitor 500, or the mode setting of a reproducing | regenerating apparatus is continuity priority mode. The flowchart which shows the process sequence of the modification of 1st Embodiment. The figure which shows the internal structure of the reproducing | regenerating apparatus concerning 2nd Embodiment. Diagram showing input / output of 24Hz-48Hz conversion circuit 21 FIG. 5 is a diagram showing the input / output of the 24 Hz-48 Hz conversion circuit 21 and the switch control by the switch control circuit 15 when the playback apparatus is connected to a multi-frame monitor and the playback apparatus status setting is the image quality priority mode. The figure which shows the operation at the time of the change of the progressive picture signal and the interlace picture signal The figure which shows the internal structure of the reproducing | regenerating apparatus concerning 3rd Embodiment. FIG. 7 is a diagram showing the input / output of the 24 Hz-72 Hz conversion circuit 24 and the switch control by the switch control circuit 15 when the playback device is connected to a multi-frame monitor and the playback device status setting is the image quality priority mode.

Explanation of symbols

1 Disc 2 Optical Pickup 3 Motor 4 Demodulation Circuit 5 Clip Information Reading Circuit 6 Video Demodulation Circuit 7 24Hz-60Hz Conversion Circuit 8 Switch 9 Digital Modulation Circuit 10 Terminal 11 Display Capability Judgment Unit 12 GUI Generation Unit 13 Mode Setting Unit 14 HDMI Synchronization Control Section 15 Switch control circuit 20 Display frequency instruction section 21 24Hz-48Hz conversion circuit 23 Display frequency instruction section 24 24Hz-72Hz conversion circuit 200 Playback device 300 Remote control 400 Hybrid monitor 500 60Hz dedicated monitor 500

Claims (12)

A playback device that outputs a video signal obtained by reading video information recorded on a recording medium to a display device,
In the recording medium, accompanying information indicating whether the frame frequency of the video signal is the first frame frequency or the second frame frequency is recorded together with the video information,
Video signal determination means for reading accompanying information from the recording medium and determining whether the video signal to be reproduced is a first frame frequency signal or a second frame frequency signal;
Mode setting means for setting either the continuous mode in which the frame frequency is not switched during playback or the non-continuous mode in which the switching of the frame frequency during playback is generated as the operation mode of the own device according to the user's selection; ,
When the own apparatus is set to the continuous mode, if the video signal to be reproduced is the first frame frequency signal as a result of the determination by the video signal determination means, the first frame frequency signal is output at the first frame frequency. If the video signal to be reproduced is the second frame frequency signal as a result of the determination by the video signal determining unit, the reproducing unit converts the frame frequency of the second frame frequency signal into the first frame frequency and outputs the converted signal. A playback apparatus comprising: The reproduction process is executed in units of a playlist that specifies a reproduction start point and a reproduction end point in at least one video information,
All of the video information whose playback start point and playback end point are specified by the playlist have the same frame frequency,
The video signal determination means determines a determination result determined based on accompanying information related to any video information for which a playback start point and a playback end point are designated by the playlist during playback processing of the playlist. 2. The playback apparatus according to claim 1, wherein the playback apparatus uses the determination result for all the video information for which the playback start point and the playback end point are specified by. The playback device is connected to a display device via a predetermined interface,
Information relating to the video standard is extracted from the display device via the predetermined interface, and the display device to be connected has only the display capability of the first frame frequency, or the display capability of the first frame frequency, And a connection partner determination means for determining whether both display capabilities of the second frame frequency are provided,
2. The playback apparatus according to claim 1, wherein the mode setting means executes the setting when it is determined that the display device has both display capabilities. If the first frame frequency signal and the second frame frequency signal are continuously output in the discontinuous mode, the user is warned that the display on the display device may be disturbed, and the user is asked to select an operation mode. GUI generation means for generating a graphics user interface and displaying it on a display device,
The mode setting means includes
The playback apparatus according to claim 1, wherein selection of either a non-continuous mode or a continuous mode is received from a user via the graphics user interface. The graphics user interface has two image states that are switched by a user operation,
The two image states are an image state that accepts a selection of continuous mode and an image state that accepts a selection of discontinuous mode,
The playback apparatus according to claim 4, wherein the GUI generation unit generates the graphics user interface in an image state in which selection of the continuous mode is accepted before receiving a user operation. The reproducing means includes
When the own apparatus is set to the discontinuous mode, if the video signal is the first frame frequency signal as a result of the determination by the video signal determination means, the first frame frequency signal is output at the first frame frequency,
As a result of the determination by the video signal determination means, if the video signal is a second frame frequency signal, the display device is instructed to display at a predetermined frame frequency, and the frame frequency of the second frame frequency signal is The playback apparatus according to claim 1, wherein the playback apparatus converts to a predetermined frame frequency and outputs the frame frequency. The predetermined frame frequency is an integer multiple of 24 Hz.
The reproducing means includes
7. The reproducing apparatus according to claim 6, further comprising a frame frequency conversion circuit that converts the frame frequency of the second frame frequency signal input to the apparatus into an integral multiple of 24 Hz and outputs the converted signal. A playback device that outputs a video signal obtained by reading video information recorded on a recording medium to a display device,
Mode setting means for setting one of a first mode in which a predetermined operation does not occur during reproduction and a second mode in which the predetermined operation can occur as an operation mode of the device according to a user's selection;
GUI generation means for generating a graphics user interface that warns the user of possible disadvantages caused by the occurrence of the predetermined operation in the second mode, and that prompts the user to select an operation mode, and displays it on the display device. With
The playback apparatus according to claim 1, wherein the mode setting means receives a selection from the first mode and the second mode from the user via the graphics user interface. The graphics user interface has two image states that are switched by a user operation,
The two image states are an image state for accepting selection of the first mode and an image state for accepting selection of the second mode,
9. The playback apparatus according to claim 8, wherein the GUI generation unit generates the graphics user interface in an image state in which selection of the first mode is accepted before receiving a user operation. A playback device that outputs video signals of a first frame frequency and a second frame frequency to a display device,
If the first frame frequency signal and the second frame frequency signal are continuously output in a non-continuous mode in which switching of the frame frequency during reproduction may occur, the user is informed that the display on the display device may be disturbed. A GUI generating means for generating a graphics user interface for requesting the user so as to select one of the continuous mode and the discontinuous mode in which there is no switching of the frame frequency during playback, and displaying on the display device.
When the graphics user interface is generated by the GUI generation means, a mode setting means for accepting selection from the user from the discontinuous mode or the continuous mode via the graphics user interface and setting it as the operation mode of the own apparatus. When,
Help that causes the GUI generating means to generate the graphics user interface if the user's request for help is made when the operation mode of the device is a non-continuous mode and the frame frequency is switched during playback. And a control means. A program that can be read by a computer incorporated in a playback device that outputs a video signal obtained by reading video information recorded on a recording medium to a display device,
In the recording medium, accompanying information indicating whether the frame frequency totuika number of the video signal is the first frame frequency or the second frame frequency is recorded together with the video information,
A video signal determination step of reading accompanying information from the recording medium and determining whether the video signal to be reproduced is a first frame frequency signal or a second frame frequency signal;
A mode setting step for setting, as a user's selection, an operation mode of the playback device, either a continuous mode in which there is no frame frequency switching during playback or a non-continuous mode in which switching of the frame frequency during playback may occur ,
When the playback apparatus is set to the continuous mode, if the video signal to be played is the first frame frequency signal, the first frame frequency signal is output at the first frame frequency, and the video signal to be played back is the second frame. If it is a frequency signal, a program for causing a computer to execute a reproduction step of converting the frame frequency of the second frame frequency signal into a first frame frequency and outputting the first frame frequency. A playback method incorporated in a playback device that outputs a video signal obtained by reading video information recorded on a recording medium to a display device,
In the recording medium, accompanying information indicating whether the frame frequency of the video signal is the first frame frequency or the second frame frequency is recorded together with the video information,
A video signal determination step of reading accompanying information from the recording medium and determining whether the video signal to be reproduced is a first frame frequency signal or a second frame frequency signal;
A mode setting step for setting, as a user's selection, an operation mode of the playback device, either a continuous mode in which there is no frame frequency switching during playback or a non-continuous mode in which switching of the frame frequency during playback may occur ,
When the playback apparatus is set to the continuous mode, if the video signal to be played is the first frame frequency signal, the first frame frequency signal is output at the first frame frequency, and the video signal to be played back is the second frame. If it is a frequency signal, it has the reproduction | regeneration step which converts and outputs the frame frequency of the said 2nd frame frequency signal to a 1st frame frequency, The reproducing method characterized by the above-mentioned.

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