JP2007158531A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of reproducing contents at an optimum aspect ratio by referring to aspect ratio information and automatically switching the aspect ratio of a display unit through the transmission of a switching signal to the display unit when the aspect ratio of the contents is changed on the way. <P>SOLUTION: A control section discriminates whether or not the aspect ratio of the reproduced contents is changed into 16:9 (s7). This discrimination is executed by comparing the aspect ratio information of the reproduced contents with aspect ratio information recorded in a storage section stated later in a step s14. The control section transmits the switching signal (instruction) denoting switching of the aspect ratio of the television receiver into the changed aspect ratio 16:9 to the television receiver (s9). Upon the receipt of the switching signal (instruction), the television receiver switches the aspect ratio to 16:9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical disk apparatus that reads content recorded on an optical disk set in the apparatus main body, and more particularly to an optical disk apparatus that refers to aspect ratio information of the content.

  2. Description of the Related Art Conventionally, an optical disc apparatus that reads content recorded on an optical disc such as a DVD (Digital Versatile Disk), generates a playback signal based on the content, and outputs playback video or playback audio to a display device has been widely used. . The display device is connected to the optical disc device via a transmission line, and is a monitor such as a TV receiver or a liquid crystal display. The content is, for example, a TV program or a movie. The optical disk device is, for example, a DVD player or a DVD recorder.

Along with the content, the aspect ratio information of the content is recorded on the optical disc. The aspect ratio information is information relating to the aspect ratio and is control data relating to the content. The aspect ratio is, for example, 4: 3 or 16: 9.
In the content, programs having different aspect ratios may be arranged in one content.

Among the latest display devices, the latest model can refer to the aspect ratio information by itself and automatically change the aspect ratio of the display device when the aspect ratio of the content changes midway. Such switching of the aspect ratio is made possible by the user setting the aspect ratio auto in the operation means.
Thus, the conventional optical disc apparatus can reproduce the content with the optimum aspect ratio on the display only by outputting the generated reproduction signal to the display.

On the other hand, a DVD recorder as described in Patent Document 1 has been proposed.
This DVD recorder has an aspect ratio information detector that detects aspect ratio information while recording video on a DVD, and the aspect ratio of the video changes with reference to the aspect ratio information detected by the aspect ratio information detector. And an MPU that acquires address information of a change point at which the aspect ratio has changed when it is detected that the change has occurred.
When the address information of the change point at which the aspect ratio has changed is acquired, the MPU indicates that “the aspect ratio from here is 4: 3 (or 16: 9)” in the program chain information (PGCI) that is the DVD control data. Record the information.
JP 2004-120473 A

However, most displays cannot refer to the aspect ratio information themselves.
Since most display devices cannot refer to the aspect ratio information themselves, if the aspect ratio of the content changes midway, the aspect ratio of the display device cannot be automatically switched.

  Also, the latest models among the display units do not refer to the aspect ratio information themselves when the user forgets to set the aspect ratio auto in the operation means. For this reason, when the aspect ratio of the content changes midway, a display device that is not set to aspect ratio auto cannot automatically change the aspect ratio.

  For this reason, the conventional optical disc apparatus has a problem that, when the aspect ratio of the content changes in the middle, the content cannot be reproduced with an optimum aspect ratio on most displays including the latest models.

  This problem is particularly noticeable when the display has an aspect ratio of 16: 9. For example, when the aspect ratio of the content changes from 4: 3 to 16: 9, the display device refers to the aspect ratio information itself even though the 16: 9 content can be played back at the aspect ratio of 16: 9. The aspect ratio cannot be switched automatically. For this reason, even when the aspect ratio of the content changes from 4: 3 to 16: 9, there is a problem that the display device has to continue reproduction with an aspect ratio of 4: 3.

  Further, in Patent Document 1, the DVD recorder can grasp the place where the aspect ratio has changed by referring to the PGCI recorded on the DVD, but the display does not refer to the place or the aspect ratio information. Therefore, the aspect ratio of the display cannot be automatically switched, which is the same as the conventional optical disc apparatus. Therefore, the DVD recorder has the same problem as the conventional optical disk device.

  The present invention seeks to solve such a conventional problem, and refers to the aspect ratio information, and when the aspect ratio of the content changes in the middle, a switching signal is transmitted to the display to display the aspect ratio of the display. It is an object of the present invention to provide an optical disc apparatus capable of automatically switching between and reproducing contents with an optimal aspect ratio.

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

(1) In an optical disc apparatus that includes a reading unit that irradiates an optical disc set in the apparatus main body with a laser beam from a pickup head and reads data from the optical disc, and is connected to a display.
The reading means refers to aspect ratio information related to the aspect ratio of the content while reading the content recorded on the optical disc, and determines whether the aspect ratio of the content has changed,
When the reading unit determines that the aspect ratio of the content has changed, the reading unit includes a command transmission unit that transmits a switching signal for switching the aspect ratio of the display unit to the changed aspect ratio to the display unit.

In this configuration, the optical disk device is, for example, a DVD recorder or a DVD player. The optical disc is, for example, a CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-R, DVD + R, DVD-RAM, DVD-RW, or DVD + RW.
The display is connected to the optical disk device via a transmission line, and is a monitor such as a TV receiver or a liquid crystal display. The content is, for example, a TV program or a movie.
Along with the content, the aspect ratio information of the content is recorded on the optical disc. The aspect ratio information is information relating to the aspect ratio and is control data relating to the content. The aspect ratio is, for example, 4: 3 or 16: 9.
The reading means confirms the aspect ratio information during reproduction, and determines whether or not the aspect ratio of the content has changed midway.
The command transmission means transmits the switching signal to the display when the aspect ratio of the content changes midway.
When the switching signal (command) is received, the display unit switches the aspect ratio from 4: 3 to 16: 9, or the aspect ratio from 16: 9 to 4: 3.
As described above, there is an effect that the content can be reproduced with the optimum aspect ratio in the display device.
Also, when the aspect ratio of the display is 16: 9 and the content aspect ratio changes from 4: 3 to 16: 9, the 16: 9 content is played back with the aspect ratio of 16: 9. it can. That is, there is an effect that the specifications of the display can be utilized to the maximum.
Note that the technology for switching the screen resolution and the like by an external signal is a commonly used technology, and the above configuration is based on this technology.

(2) The command transmission means determines whether or not a certain time has elapsed since the last transmission of the switching signal, and transmits the switching signal to the display when it is determined that the certain time has elapsed.

In this configuration, the fixed time is, for example, 5 minutes or 10 minutes.
In the above (1), the command transmission means transmits the switching signal to the display every time the aspect ratio of the content changes midway. Here, the aspect ratio of the content changes midway and When a predetermined time has elapsed since the last switching signal was transmitted, the switching signal is transmitted to the display.
For this reason, the display device does not frequently switch the aspect ratio, and the switching is moderate.
As described above, it is possible to avoid frequent switching of the aspect ratio of the display device. Therefore, it is possible to prevent the user from feeling uncomfortable.
The optical disc apparatus may be provided with operation means for setting the predetermined time. In this case, when the predetermined time is set by the operation means, the command transmission means determines whether or not the set fixed time has elapsed since the previous switching signal was transmitted. Thereby, there exists an effect that a user can set a fixed time freely now. The frequency at which the aspect ratio of the display is switched varies depending on the change over a certain period of time.

  According to the present invention, it is possible to reproduce content with an optimal aspect ratio on the display.

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

FIG. 1 is a block diagram showing a main configuration of an optical disc apparatus according to an embodiment of the present invention.
The optical disc apparatus 1 is a so-called DVD recorder, and includes a control unit 4 that controls the apparatus main body 1, a pickup head 2 that records and reads data on the optical disc 100 (hereinafter referred to as a PU head 2), and an RF amplifier. A recording / reproducing unit 3 such as a reproduction key, a recording key or an operation unit 5 provided with trick play keys such as a recording key, a display unit 7 for displaying information, a storage unit 6 for storing data, and a voice A D / A converter 11 that converts data into an analog reproduced audio signal; a video processing unit 13 that converts video data into an analog reproduced video signal; a receiving unit 10 that receives a TV broadcast signal and acquires data; It has.
Furthermore, the optical disc apparatus 1 is connected to the television 101 via an audio terminal, a video terminal, and a control terminal. Control lines and control terminals between the optical disc apparatus 1 and the television 101 are lines and terminals for transmitting commands in later-described FIGS. 3S9 and S12.

In this embodiment, the control line and the control terminal are provided. However, the control line and the control terminal are provided for ease of explanation, and the control line and the control terminal may not be provided separately, and are not limited thereto. The commands to be transmitted in FIGS. 3 s 9 and s 12 to be described later can be transmitted to the television 101 via the audio line and the audio terminal or the video line and the video terminal.
In this embodiment, the television 101 is connected, but a monitor such as a liquid crystal may be used.
In this embodiment, the DVD recorder is described, but a DVD player may be used.

  The optical disc 100 is, for example, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-R, a DVD + R, a DVD-RAM, a DVD-RW, or a DVD + RW.

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

First, the operation during reproduction will be described.
The PU head 2 irradiates the optical disc 100 with a laser beam having a reading power, and detects the reflected light from the optical disc 100 with a photodetector. Thereby, information recorded on the optical disc 100, that is, control data and content are optically read out. The content is, for example, a TV program or a movie. The control data is aspect ratio information, for example. The aspect ratio information is information relating to the aspect ratio and is control data relating to the content. The aspect ratio is, for example, 4: 3 or 16: 9.
The recording / reproducing unit 3 generates an RF signal based on the outputs of the plurality of light receiving elements in the PU head 2 and amplifies the RF signal. Then, the recording / reproducing unit 3 processes the RF signal to extract and decode video and audio data (AV data). At this time, control data is also taken out. Here, the extracted video and audio data is encoded by, for example, MPEG. Then, the recording / reproducing unit 3 outputs the audio data to the D / A converter 11 and the video data to the video processing unit 13 while synchronizing both data.
The D / A converter 11 converts the expanded audio data into an analog reproduction audio signal, and outputs the reproduction audio signal to the external television 101.
If the television 101 is digital compatible, it may be output digitally.

The video processing unit 13 converts the input video data into an analog playback video signal and outputs it to the external television 101.
If the television 101 is digital compatible, it may be output digitally.

  A television 101 is connected to the D / A converter 11 and the video processing unit 13, and the user can use the television 101 to output video based on the video signals output from the D / A converter 11 and the video processing unit 13, and Audio based on the audio signal can be viewed.

Next, the operation during recording will be described.
The receiving unit 10 is a tuner, for example.
The receiving unit 10 extracts a TV broadcast signal of a selected channel from an antenna that receives a TV broadcast or the like, A / D converts it, digitizes it, and outputs it. If it is input as data as in the Internet or digital broadcasting, the receiving unit 10 extracts the data from the packet or TV broadcast signal and outputs it.
Here, the receiving unit 10 not only receives a TV broadcast signal or the like from an antenna for TV broadcast or the like, but also receives a moving image captured by the imaging device.

The recording / reproducing unit 3 encodes the input data (for example, in MPEG) and outputs a digital signal to the PU head 2. The input data includes AV (audio visual) data and is encoded after being separated.
When a digital signal is input from the recording / reproducing unit 3, the PU head 2 controls a laser beam having a recording power in accordance with the digital signal and irradiates the recording surface of the optical disc 100.

The operation unit 5 is used by the user to input various commands (commands) to the optical disc apparatus 1, and is provided with a plurality of keys including a setting key and a trick play key. A command input by the user to the optical disc apparatus 1 is transmitted to the control unit 4.
The trick play key is, for example, a reproduction key, a recording key, a skip key, a fast-forward key, or a repeat key.
This setting key is a key for inputting in advance an aspect ratio that can be handled by the television 101.

  The storage unit 6 is composed of, for example, an EEPROM, and stores a main control program for the apparatus main body 1. Furthermore, the storage unit 6 stores an aspect ratio that can be handled by the television 101 that is input in advance using the setting key of the operation unit 5. The aspect ratio is, for example, 4: 3 or 16: 9.

The display unit 7 displays the time, the setting state of the optical disc apparatus 1 and the like.
The control unit 4 is composed of, for example, a microcomputer, and controls each unit of the optical disc apparatus 1 in accordance with a command input to the optical disc apparatus 1 from a user.
Further, the control unit 4 incorporates a timer circuit (clock unit) that measures time in FIGS. 3 s 8, s 11, and s 13 described later. Further, the timer circuit (clock unit) passes the time.
In an actual optical disc apparatus, tracking servo control for adjusting the laser beam irradiation position to the center of the track of the optical disc at the time of reading or recording, focus servo control for adjusting the focal position of the laser beam to the recording surface of the optical disc, Although not shown in the embodiment of the present invention.

  Here, the PU head 2, the recording / reproducing unit 3, and the control unit 4 correspond to the “reading unit” of the present invention. The control unit 4 corresponds to the “command transmission unit” of the present invention. The television 101 corresponds to the “display” of the present invention.

FIG. 2 is a diagram showing a data structure of data on an optical disc recorded in the DVD-Video format. On the optical disc 100 recorded in the DVD-Video format, VMGI, VMGM_VOBS, and titles 1 to 3 are recorded from the inner periphery to the outer periphery as shown in FIG.
In this embodiment, the DVD-Video format is described. However, the present invention is not limited to this, and the VR format may be used.

VMGI (Video Manager InforMation) describes reproduction-related information (control data) of the entire DVD-Video, so-called root menu information. For example, VTSI address information and chapter information are also described here. The chapter information is information indicating the position of the chapter to be set.
VMGM_VOBS (Video Object Set for VMG Menu) describes the content used in the title menu. In some cases, reproduction-related information (control data) of the entire DVD-Video including VTSI address information and the like is described.
VMGIbup is a VMGI backup file.
Hereinafter, VMG refers to VMGI or VMGM_VOBS.

  The title is composed of VTSI (Video Title Set InforMation), VOBS (Video Object Set), and VTSIbup (see FIG. 2 (a)), and can record up to 99 titles. In FIG. 2 (a), three titles are recorded.

The VTSI describes control data for the VTS.
VOBS describes contents for title reproduction, and is composed of a plurality of cells as shown in FIG. In FIG. 2B, #n is a cell number.
Note that VOBS and VTS represent the same thing.
VTSIbup describes a backup file of VTSI.
Here, VTSI, VOBS, and VTSIbup # 1 to # 3 correspond to title numbers.

In the DVD-Video format, data is recorded in predetermined cell units.
The cell is composed of a plurality of VOBUs (Video Object Units) (see FIG. 2C). In FIG. 2C, #m is a VOBU number. The maximum number of cells for one title is 255 cells. Therefore, when 10 hours worth of data is recorded on the optical disc, one cell is 2 minutes 30 seconds, for example.
Here, 10 hours of data may be recorded in one cell. However, since it is necessary to write the playback time of the cell in NV_PCK, once the cell starts to be recorded on the optical disc 100, even if the user stops recording. Recording cannot be stopped until the cell has been recorded. Therefore, in consideration of convenience, a time of about 2 minutes 30 seconds is desirable for one cell.

In the VOBU, NV_PCK (Navigatyion Pack) is placed at the head, and then contents such as video data and audio data (AV data) are packed and inserted (see FIG. 2D).
Here, in order to record the current VOBU, it is necessary to write the start addresses of a plurality of VOBUs to be recorded after the current VOBU, the playback time of cells, and the like into NV_PCK in the current VOBU.
In the DVD-Video format, data is recorded in order from the beginning, for example, as if it were a single stroke, so editing after recording cannot be performed.

The aspect ratio information is described in NV_PCK. It may also be described in the sequence header of the video pack.
More specifically, NV_PCK describes RDI_GI, DCI, CCI, and MNFI.
RDI_GI is real-time data information general information, and includes the presentation start time and VOBU recording time of the first video field of the VOBU to which this RDI_GI belongs. DCI is display control data and includes aspect ratio information. The CCI is copy control data and includes copy prohibition information and copy permission information. MNFI is manufacturer information.
The aspect ratio information (0000) indicates, for example, 4: 3, and (0001) indicates, for example, 16: 9.

  FIG. 3 is a flowchart showing an operation performed by the control unit when the reproduction key is pressed in the optical disc apparatus according to the embodiment of the present invention. The playback key pressing routine shown in FIG. 3 is a routine (preinstalled) related to the main control program, and is called from the main control program when the playback key is pressed.

FIG. 4 is a diagram illustrating how the aspect ratio of the television 101 is switched.
FIG. 4A is a diagram illustrating a state in which the aspect ratio of the television 101 is switched to 4: 3.
FIG. 4B is a diagram illustrating a state in which the aspect ratio of the television 101 is switched to 16: 9.

  When the reproduction key is pressed, it becomes a trigger, and the control unit 4 executes the reproduction key pressing routine shown in FIG. 3 and performs the following operations.

  First, the control unit 4 determines whether the optical disc 100 is set in the apparatus main body 1 (s1). This determination is made, for example, by irradiating the PU head 2 with laser light and whether the PU head 2 can detect the reflected light. If the PU head 2 can detect the reflected light, the recording / reproducing unit 3 converts the reflected light into an electric signal and transfers it to the control unit 4. The control unit 4 can determine that the optical disc 100 is set in the apparatus main body 1 when the electric signal is transferred.

  If it is determined in s2 that the optical disc 100 is not set in the apparatus main body 1, the control unit 4 ends this process. Here, at the end, the control unit 4 may cause the display unit 7 to display a character requesting the user to set the optical disc on the apparatus main body. For example, the character for requesting the user to set the optical disk in the apparatus main body is to set the disk in the apparatus main body.

  On the other hand, when it is determined in s1 that the optical disc 100 is set in the apparatus main body 1, the control unit 4 controls each part of the apparatus main body 1 to perform reproduction (s2). As a result, the PU head 2 starts reading data from the optical disc 100, that is, reading content.

  The control unit 4 refers to the aspect ratio of the television 101 stored in the storage unit 6 (s3). The aspect ratio of the television 101 is information registered in advance by the user. The user checks the aspect ratio of the television 101 and registers in advance using the setting key of the operation unit 5.

The control unit 4 determines whether or not the aspect ratio of the referenced television 101 is 16: 9 (s4).
In s4, since it is desirable to apply the reproduction key pressing routine to a display device having an aspect ratio of 16: 9 rather than a display device having an aspect ratio of 4: 3, the display device having an aspect ratio of 4: 3 is determined to be negative. However, if the playback key pressing routine is also used for a display with an aspect ratio of 4: 3 instead of excluding the display with an aspect ratio of 4: 3, s4 may be passed.
If it is determined that the aspect ratio of the referenced television 101 is not 16: 9, the control unit 4 ends this process.

  On the other hand, when determining that the aspect ratio of the referred television 101 is 16: 9, the control unit 4 determines whether or not the reproduction is currently being performed (s5).

  If not currently being played back, the control unit 4 ends this processing. That is, during playback, the control unit 4 repeats the processes of s5, s6, s7, and s10.

If currently being reproduced, the control unit 4 confirms the aspect ratio of the content currently being reproduced (s6). The aspect ratio of the content being reproduced is confirmed by the control unit 4 referring to the aspect ratio information of the control data taken out by the recording / reproducing unit 3. In s6, the control unit 4 refers to the aspect ratio information of NV_PCK in the NV_PCK and the sequence header of the video pack (see FIG. 2).
It should be set in advance which of NV_PCK and video pack sequence header is to be referred to.

Then, the control unit 4 determines whether or not the aspect ratio of the content being reproduced has changed to 16: 9 (s7). This determination is made by comparing the aspect ratio information of the content being reproduced with the aspect ratio information recorded in the storage unit 6 in s14 described later. Further, in s7 determination affirmation, it is assumed that the aspect ratio of the content being reproduced has changed from 4: 3 to 16: 9.
Note that aspect ratio information is not recorded in the storage unit 6 in s14, which will be described later, that is, if it is the first time, in s7, the control unit 4 determines whether or not the aspect ratio of the content being reproduced is 16: 9. To do.

If it is determined that the aspect ratio of the content being reproduced has not changed to 16: 9, the control unit 4 determines whether or not the aspect ratio of the content being reproduced has changed to 4: 3 (s10). This determination is made by the same method as in s7. In s10 judgment affirmation, a scene is assumed in which the aspect ratio of the content being reproduced has changed from 16: 9 to 4: 3.
It should be noted that the aspect ratio information is not recorded in the storage unit 6 in s14 to be described later, that is, if it is the first time, in s10, the control unit 4 determines whether or not the aspect ratio of the content being reproduced is 4: 3. To do.

  When determining that the aspect ratio of the content being reproduced has not changed to 4: 3, the control unit 4 proceeds to s5 and continues the processing.

On the other hand, when it is determined that the aspect ratio of the content being reproduced has changed to 16: 9, the control unit 4 determines whether or not a certain time has elapsed since the previous command was transmitted to the television 101 ( s8). This determination is made by referring to the time when the measurement is started in s13, which will be described later, with a timer circuit built in the control unit 4. The certain time is, for example, 5 minutes. The purpose of providing s8 is that if the aspect ratio of the television 101 is frequently switched, the user is uncomfortable. Therefore, in s8, the aspect ratio of the television 101 is avoided from being frequently switched (see FIG. 4).
Note that if the command is not transmitted in s9 described later, that is, if it is the first time, the control unit 4 determines s8 as affirmative.
As described above, it is possible to avoid frequent switching of the aspect ratio of the television 101. Therefore, it is possible to prevent the user from feeling uncomfortable.
The operation unit 5 may be provided with a key for setting the predetermined time. In this case, when a certain time is set by the operation unit 5, the control unit 4 determines whether or not the set certain time has elapsed since the previous switching signal was transmitted. Thereby, there exists an effect that a user can set a fixed time freely now. By changing this fixed time, the frequency at which the aspect ratio of the television 101 is switched also varies.

  If it is determined in s8 that the predetermined time has not elapsed since the previous command was transmitted to the television 101, the control unit 4 returns to s5 and continues the processing.

On the other hand, if it is determined in s8 that a certain time has elapsed since the previous command was transmitted to the television 101, the control unit 4 switches to change the aspect ratio of the television 101 to the changed aspect ratio 16: 9. A signal (command) is transmitted to the television 101 (s9).
When receiving this switching signal (command), the television 101 switches the aspect ratio to 16: 9 as shown in FIG.
The technology for switching the screen resolution and the like by an external signal is a commonly used technology, and the embodiment of the present invention is premised on this technology.
As described above, the television 101 has an effect that the content can be reproduced with an optimal aspect ratio of 16: 9.
Further, the television 101 can play back 16: 9 content with an aspect ratio of 16: 9. That is, there is an effect that the specifications of the television 101 can be fully utilized.

On the other hand, if it is determined in s10 that the aspect ratio of the content being reproduced has changed to 4: 3, the control unit 4 determines whether or not a certain time has elapsed since the previous command was transmitted to the television 101. Judgment is made (s11). This determination is similar to s8 and has the same purpose.
Note that if the command is not transmitted in s12 described later, that is, if it is the first time, the control unit 4 determines s11 as affirmative.

  If it is determined in s11 that the predetermined time has not elapsed since the previous command was transmitted to the television 101, the control unit 4 returns to s5 and continues the processing.

On the other hand, if it is determined in s11 that a certain time has elapsed since the previous command was transmitted to the television 101, the control unit 4 switches to change the aspect ratio of the television 101 to the changed aspect ratio 4: 3. A signal (command) is transmitted to the television 101 (s12).
When receiving this switching signal (command), the television 101 switches the aspect ratio to 4: 3 as shown in FIG.
As described above, there is an effect that the television 101 can reproduce the content with the optimum aspect ratio 4: 3.

As soon as the command is transmitted in s9 or s12, the control unit 4 starts the timer of the built-in timer circuit (s13). This timer is used in the determination of s8 and s11.
The control unit 4 records the aspect ratio information of the switched aspect ratio in the storage unit 6 (s14), and returns to s5 to continue the processing. The aspect ratio information recorded in the storage unit 6 is used in the determination of s7 and s10.

1 is a block diagram showing a main configuration of an optical disc apparatus according to an embodiment of the present invention. The figure which shows the data structure of the data on the optical disk recorded by the DVD-Video format 7 is a flowchart showing an operation performed by the control unit when the playback key is pressed in the optical disc apparatus according to the embodiment of the present invention. The figure which shows a mode that the aspect-ratio of the television 101 switches.

Explanation of symbols

1-optical disk device 2-PU head 3-recording / reproducing unit 4-control unit 5-operation unit 6-storage unit 7-display unit 10-receiving unit 11-D / A converter 13-video processing unit 100-optical disk 101-TV John

Claims (3)

In an optical disc apparatus provided with reading means for irradiating an optical disc set in the apparatus main body with a laser beam from a pickup head and reading data from the optical disc, and connected to a display device,
The reading means refers to aspect ratio information related to the aspect ratio of the content while reading the content recorded on the optical disc, and determines whether the aspect ratio of the content has changed,
When the reading means determines that the aspect ratio of the content has changed, it determines whether or not a certain time has elapsed since the last switching signal was transmitted, and when it is determined that the certain time has elapsed, the aspect of the display device An optical disc apparatus comprising command transmission means for transmitting a switching signal for switching the ratio to the changed aspect ratio to the display. In an optical disc apparatus provided with reading means for irradiating an optical disc set in the apparatus main body with a laser beam from a pickup head and reading data from the optical disc, and connected to a display device,
The reading means refers to aspect ratio information related to the aspect ratio of the content while reading the content recorded on the optical disc, and determines whether the aspect ratio of the content has changed,
An optical disc apparatus comprising command transmission means for transmitting a switching signal for switching the aspect ratio of the display to the changed aspect ratio when the reading means determines that the aspect ratio of the content has changed.   The said command transmission means judges whether fixed time passed since transmitting the last switching signal, and when it is judged that this fixed time passed, it transmits the said switching signal to a display. Optical disk device.

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