JP4082968B2 - Optical disk playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc reproducing apparatus such as a DVD player.
[0002]
[Prior art]
An optical disc playback device has been developed that reads a bit stream from a recording medium on which a bit stream consisting of a compressed video signal and audio signal is recorded, decodes the read bit stream into the original video signal and audio signal, and reproduces the original video signal and audio signal This is well known. One of the optical disk playback devices is a DVD player.
[0003]
In general, a DVD player has settings for OSD language, audio language, subtitle language, and DVD menu language in addition to parental settings, audio output settings, and video output settings on a setup screen (initial setting screen). It has a function to make the user perform. The setting contents set by the user on the setup screen are retained even when the power is turned off.
[0004]
The initial values (default values) of the audio language, subtitle language, and DVD menu language that can be set on the setup screen usually mean that the highest priority language determined by the DVD disc to be played follows. "Original" to do.
[0005]
When the OSD language is changed on the setup screen, the OSD display language (OSD language) provided by the DVD player is switched.
[0006]
In addition, if the audio language is set to a language other than the “original” which is the initial value on the setup screen, these languages are not particularly specified by the navigation command in the DVD disc, and the set audio language If the same audio language exists in the audio stream recorded on the DVD disc, playback is performed in the set language. The same applies when the subtitle language is set to a language other than “original” which is the initial value on the setup screen.
[0007]
In addition, if the DVD menu language is set to a language other than “original” which is the initial value on the setup screen, the same DVD menu language as the set DVD menu language is prepared on the DVD disc. The DVD menu screen is displayed according to the set DVD menu language. The DVD menu screen is a menu screen displayed based on the recording data in the DVD disc, and the user can set the playback start position, audio language, subtitle language, and the like on the DVD menu screen.
[0008]
Furthermore, the user can switch the audio language (audio stream) by operating an audio language switching key provided on the remote control transmitter of the DVD player. That is, every time the audio language switch key is pressed, the audio stream is cyclically switched.
[0009]
Further, the user can switch the subtitle language (subtitle stream) by operating the subtitle key provided on the remote control transmitter of the DVD player. That is, when the subtitle key is operated, a subtitle language switching menu screen as shown in FIG. 1 is displayed on the screen. In this example, a subtitle language display unit 101 for displaying the currently selected subtitle language is displayed at the center. A mark 102 representing a left arrow key on the left side of the subtitle language display unit 101, a mark 103 representing a right arrow key on the right side of the subtitle language display unit 101, and an up arrow key on the upper side of the language display unit 101 A character “ON” is displayed together with the mark 104, and a character “OFF” is displayed below the language display unit 101 together with the mark 105 representing the down arrow key.
[0010]
Left, right, up, and down arrow keys are provided on the remote control transmitter of the DVD player, and each time the left arrow key (subtitle language switching key) is pressed while the subtitle language switching menu screen is displayed on the screen. In addition, the subtitle stream is cyclically switched in descending order of the subtitle stream number. Each time the right arrow key (subtitle language switching key) is pressed while the subtitle language switching menu screen is displayed on-screen, the subtitle stream is cyclically switched in ascending order of the subtitle stream number. In addition, when the up arrow key (caption on key) is pressed while the subtitle language switching menu screen is displayed on the screen, caption display is turned on (caption display is performed). When the down arrow key (subtitle off key) is pressed while the subtitle language switching menu screen is displayed on the screen, the subtitle display is turned off (subtitle display is not performed).
[0011]
By the way, DVDs containing Hollywood movies released in Europe and Japan are authored with audio and subtitles in multiple languages according to the region where they are released, in addition to English audio and English subtitles. There are many cases. For example, in the case of a DVD released in Germany, the subtitle languages are English, German, Norwegian, Danish, Finnish, Arabic, English for people with hearing impairments, and hearing loss. German for free people is authored.
[0012]
In such a DVD, Finnish is set as the subtitle language on the setup screen of the DVD player, but when English is selected as the subtitle language by the operation of the subtitle key and subtitle switching key (left and right arrow keys), To return the subtitle language to the Finnish language set on the setup screen, the user needs to press the subtitle language switch key to display the subtitle language switch menu screen and press the right arrow key or the left arrow key four times. there were.
[0013]
When a DVD that contains a Hollywood movie and is released in Japan is played, the DVD navigation information is generally played in a combination of English audio and Japanese subtitles. During playback of such a DVD, the user may operate the voice language switching key to switch the voice language to Japanese for playback. Thus, when the audio language is switched to Japanese, Japanese subtitles are not required. Therefore, the user needs to press the subtitle key to display the subtitle language switching menu screen and operate the down arrow key (subtitle off key).
[0014]
[Problems to be solved by the invention]
An object of the present invention is to provide an optical disc playback apparatus that can quickly switch a subtitle language to a subtitle language set by a user on a setup screen.
[0015]
The present invention also provides an optical disc playback apparatus capable of automatically turning off subtitle display when the audio language is switched to an audio stream in the same language as the subtitle language when the subtitle is displayed. The purpose is to do.
[0019]
[Means for Solving the Problems]
According to the first aspect of the present invention, the means for determining whether or not the caption is being displayed when the switching of the audio stream based on the audio stream switching operation is confirmed during the optical disc reproduction, the caption is being displayed. In this case, means for determining whether the language of the switched audio stream and the language of the subtitle being displayed are the same, and the language of the switched audio stream and the language of the subtitle being displayed are the same. In some cases, a subtitle display automatic off means for automatically turning off the subtitle display is provided.
[0020]
According to the second aspect of the present invention, when the audio stream switching based on the audio stream switching operation is confirmed during reproduction of the optical disc, the means for determining whether or not the subtitle is being displayed, the subtitle is being displayed. In this case, a means for determining whether or not the language of the switched audio stream and the language of the subtitle being displayed are the same, and the language of the switched audio stream and the language of the subtitle being displayed are the same In the case, the means for determining whether or not the audio language code extension of the switched audio stream is a predetermined value, and the audio language code extension of the switched audio stream is a predetermined value. In some cases, a subtitle display automatic off means for automatically turning off the subtitle display is provided.
[0021]
According to a third aspect of the present invention, in the optical disk reproducing apparatus according to any one of the first and second aspects, the subtitle display is automatically performed by the subtitle display automatic-off means during the optical disk reproduction and the subtitle display is automatically turned off. When the audio stream switching based on the audio stream switching operation is confirmed in the off state, the subtitle stream whose display is turned off by the subtitle display automatic off means is automatically displayed. It is characterized by that.
[0022]
According to a fourth aspect of the present invention, in the optical disc playback apparatus according to any one of the first and second aspects, the subtitle display is automatically turned off by the subtitle display automatic off means during the optical disc playback. If the audio stream switching based on the audio stream switching operation is confirmed in the off state, it is determined whether the subtitle language is set to a language other than the initial value determined by the optical disc on the setup screen. If it is determined that the subtitle language is set to a language other than the initial value determined by the optical disc on the setup screen and the subtitle stream in the same language as the subtitle language set on the setup screen It is characterized by comprising means for displaying.
[0023]
According to a fifth aspect of the present invention, in the optical disc playback apparatus according to any one of the first and second aspects, the subtitle display is automatically turned off by the subtitle display automatic off means during the optical disc playback. If the audio stream switching based on the audio stream switching operation is confirmed in the off state, it is determined whether the subtitle language is set to a language other than the initial value determined by the optical disc on the setup screen. If it is determined that the subtitle language is set to a language other than the initial value determined by the optical disc on the setup screen and the subtitle stream in the same language as the subtitle language set on the setup screen And display the subtitle stream whose subtitle language code extension is a predetermined value Characterized in that it comprises means for.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a DVD player will be described.
[0025]
[1] Description of configuration of DVD player
FIG. 2 shows the configuration of the DVD player.
[0027]
The drive unit 1 reads information from the disk. The bit stream read by the drive unit 1 is sent to the AV decoder 2.
[0028]
The AV decoder 2 demultiplexes the bit stream sent from the drive unit 1 into PCI information (playback control information), video information, sub-picture information, and audio information by an internal DEMUX (demultiplexer), Decoding is performed by a decoder, a video decoder, a sub-picture decoder, and an audio decoder. Each decoded information is stored in the memory 3 inside the AV decoder which can be read by the CPU 6.
[0029]
The decoded audio signal, video signal and sub-picture signal are synchronized at a predetermined transfer timing, the audio signal is output as audio, and the video signal and sub-picture signal are transmitted to the video mixer 7.
[0030]
An operation signal from the user (a remote control signal from the remote controller or a key input signal from the operation unit provided in the DVD player main body) is input to the CPU 6 via the user interface unit 4. The on-screen generation unit 5 generates graphic information (on-screen image information) according to an instruction from the CPU 6 and sends it to the video mixer 7. The video mixer 7 mixes the video signal and sub-picture signal sent from the AV decoder 2 and the graphic information sent from the on-screen generator 5 into one video signal, and outputs the video.
[0031]
This DVD player has a function capable of setting an OSD language, an audio language, a caption language, and a DVD menu language on a setup screen.
[0032]
In addition, in this DVD player, an audio language switching key, a subtitle key, and left / right / up / down arrow keys are provided on an operation unit (an operation unit provided on a remote control or a DVD player main body) as in the conventional case. A setup priority subtitle language switching key for switching the language to the subtitle language set on the setup screen is provided.
[0033]
The method of switching the speech language using the speech language switching key is the same as the method described in the conventional example. Also, the method of switching the subtitle language using the subtitle key and the left and right arrow keys is the same as the method described in the conventional example. The method for switching on / off the subtitle display using the subtitle key and the up and down arrow keys is the same as the method described in the conventional example.
[0034]
[2] Explanation of operation when the setup priority subtitle language switching key is pressed during playback.
FIG. 3 shows an example of the processing procedure of the CPU 6 when the setup priority subtitle language switching key is pressed during reproduction.
[0036]
When the setup priority subtitle language switch key is pressed during playback (step 1), there are two or more subtitle streams in the DVD being played back and the subtitle language set on the setup screen is other than the initial value (original) It is determined whether or not the condition of being is satisfied (step 2).
[0037]
If the above condition is not satisfied, the current process is terminated without switching the subtitle stream.
[0038]
If the above condition is satisfied, a search for a subtitle stream having the same language as the subtitle language set on the setup screen is started (step 3). In this case, if the current subtitle stream number is n, the search is performed in ascending order of the stream numbers, for example, n + 1 and n + 2.
[0039]
When a subtitle stream having the same language as the subtitle language set on the setup screen can be searched (YES in step 4), the currently displayed subtitle stream is switched to the subtitle stream that can be searched (step 5). And this process is complete | finished.
[0040]
As a result of searching for all the subtitle streams, if a subtitle stream with the same language as the subtitle language set in the setup screen is not found (NO in step 4), the current subtitle stream is not switched. The process ends.
[0041]
By the way, the caption language code extension is added to the caption language. Subtitle language extensions include, for example, 00h (not specified), 01h (normal size character subtitles), 02h (large size character subtitles), 03h (children subtitles), and the like. h is a symbol indicating a hexadecimal number. Some DVD players have a stream confirmation function using a subtitle language code extension.
[0042]
FIG. 4 shows an example of the processing procedure of the CPU 6 when the setup priority subtitle language switching key is pressed during reproduction when the DVD player has a stream confirmation function using a subtitle language code extension. .
[0043]
When the setup priority subtitle language switch key is pressed during playback (step 11), there are two or more subtitle streams in the DVD being played back and the subtitle language set on the setup screen is other than the initial value (original) It is determined whether or not the condition is satisfied (step 12).
[0044]
If the above condition is not satisfied, the current process is terminated without switching the subtitle stream.
[0045]
When the above conditions are satisfied, a search for a subtitle stream having the same language as the subtitle language set on the setup screen and having a subtitle language code extension of 00h or 01h is started (step 13). In this case, if the current subtitle stream number is n, the search is performed in ascending order of the stream numbers, for example, n + 1 and n + 2.
[0046]
If a subtitle stream having the same language as the subtitle language set on the setup screen and a subtitle language code extension of 00h or 01h can be searched (YES in step 14), the subtitle stream being displayed is selected. The subtitle stream is switched to the retrieved subtitle stream (step 15). And this process is complete | finished.
[0047]
As a result of searching for all subtitle streams, if a subtitle stream having the same subtitle language and language set on the setup screen and having a subtitle language code extension of 00h or 01h is not found (step 14). NO), the current process is terminated without switching the subtitle stream.
[0048]
In the above embodiment, a setup priority subtitle language switching key for switching the subtitle language to the subtitle language set on the setup screen is provided on the operation unit (the operation unit provided on the remote control or the DVD player main body). However, in the state where the subtitle key is pressed and the subtitle language switching menu screen is displayed, an existing specific key (for example, pause key) is used as a key having the same function as the setup priority subtitle language switching key. You may make it allocate.
[0049]
In this case, when the subtitle key is pressed and the subtitle language switching menu screen is displayed, an existing specific key assigned as a key having the same function as the setup priority subtitle language switching key is displayed. When a key (for example, a pause key) is pressed, the process after step 2 in FIG. 3 or the process after step 12 in FIG. 4 is executed.
[0050]
[3] Explanation of operation when an audio stream is switched by an audio stream switching key operation or a DVD menu during reproduction.
FIG. 5 shows an example of the processing procedure of the CPU 6 when the audio stream is switched by the audio stream switching key operation or the DVD menu during reproduction.
[0052]
When the audio stream switching is confirmed based on the audio stream switching operation during reproduction (step 31), that is, after the audio stream is switched by the audio stream switching key operation or the DVD menu during reproduction, the audio stream is further switched. If a certain time elapses without being displayed, it is determined whether or not the caption is being displayed (caption display on) (step 32).
[0053]
If the subtitle is being displayed, it is determined whether or not the language of the switched audio stream is the same as the language of the currently displayed subtitle stream (step 33).
[0054]
When the language of the switched audio stream is the same as the language of the currently displayed subtitle stream, the subtitle display is automatically turned off, and the subtitle display indicates that the subtitle display is automatically turned off. The display automatic off flag F is set (F = 1) (step 34). And this process is complete | finished.
[0055]
The subtitle display automatic off flag F is reset (F = 0) when the power of the DVD player is turned on or when an operation for loading / unloading a disc, for example, when a tray on which a disc is placed is opened. Further, the caption display automatic off flag F is turned off by a factor other than that the caption display is automatically turned off by the processing of step 34 as in the case where the caption display automatic off flag F is turned off by the user's caption off key (downward key) operation. If the subtitle display is turned on by a user operation, it is also reset (F = 0).
[0056]
If it is determined in step 33 that the language of the audio stream is not the same as the language of the currently displayed subtitle stream, the current process ends.
[0057]
If it is determined in step 32 that no caption is being displayed (caption display off), it is determined whether or not the caption display automatic off flag F is set (step 35). When the subtitle display automatic off flag F is set, it is determined that the subtitle display is turned off by automatically turning off the subtitle display by the process of step 34, and the subtitle display is automatically performed. (Step 36). As a result, the subtitles that were automatically turned off are displayed.
[0058]
If it is determined in step 35 that the caption display automatic off flag F has been reset, the current process is terminated.
[0059]
When the subtitle display is turned on in step 36, the subtitle stream corresponding to the subtitle language set on the setup screen is searched by performing the same processing as steps 2 and 3 in FIG. The searched subtitle stream may be displayed. If the DVD player has a stream confirmation function using a subtitle language code extension, the subtitle language set on the setup screen is performed by performing the same processing as steps 12 and 13 in FIG. And a subtitle stream with a subtitle language code extension of 00h or 01h may be retrieved and displayed.
[0060]
By the way, a voice language code extension is added to the voice language. For example, 00h (unspecified), 01h (normal voice), 02h (blind voice), 03h (director comment 1: voice with director comment 1 added to normal voice) , 04h (director comment 2: voice in which director comment 2 is added to normal voice). h is a symbol indicating a hexadecimal number. Some DVD players have a stream confirmation function using an audio language code extension.
[0061]
FIG. 6 shows the processing procedure of the CPU 6 when the audio stream is switched by the audio stream switching key operation or the DVD menu during reproduction when the DVD player has a stream confirmation function using the audio language code extension. An example is shown.
[0062]
When the switching of the audio stream is confirmed based on the audio stream switching operation during reproduction (step 41), it is determined whether or not the subtitle is being displayed (subtitle display on) (step 42).
[0063]
If subtitles are being displayed, it is determined whether the language of the switched audio stream is the same as the language of the currently displayed subtitle stream (step 43).
[0064]
If the language of the switched audio stream is the same as the language of the currently displayed subtitle stream, it is determined whether or not the audio language code extension of the switched audio stream is 00h or 01h ( Step 44).
[0065]
When the audio language code extension of the switched audio stream is 00h or 01h, the caption display is automatically turned off, and a caption display automatic off flag F indicating that the caption display is automatically turned off is set. Set (F = 1) (step 45). And this process is complete | finished.
[0066]
If it is determined in step 43 that the language of the audio stream is not the same as the language of the currently displayed subtitle stream, the current process ends.
[0067]
If it is determined in step 44 that the audio language code extension of the audio stream is not 00h or 01h, the current process ends. This is because if the audio language code extension is not 00h or 01h, the audio content and the subtitle display content are different even if the language of the switched audio stream is the same as the language of the currently selected subtitle stream. This is because the subtitle display is not automatically turned off because it is expected that they do not match.
[0068]
If it is determined in step 42 that no caption is being displayed (caption display off), it is determined whether or not the caption display automatic off flag F is set (step 46). When the subtitle display automatic off flag F is set, it is determined that the subtitle display is turned off by the fact that the subtitle display is automatically turned off by the processing of step 45, and the subtitle display is automatically set. (Step 47). As a result, the subtitles that were automatically turned off are displayed.
[0069]
If it is determined in step 46 that the caption display automatic off flag F has been reset, the current process is terminated.
[0070]
When the subtitle display is turned on in step 47, the subtitle stream corresponding to the subtitle language set on the setup screen is searched by performing the same processing as steps 2 and 3 in FIG. The searched subtitle stream may be displayed. If the DVD player has a stream confirmation function using a subtitle language code extension, the subtitle language set on the setup screen is performed by performing the same processing as steps 12 and 13 in FIG. And a subtitle stream with a subtitle language code extension of 00h or 01h may be retrieved and displayed.
[0071]
【The invention's effect】
According to the present invention, the subtitle language can be quickly switched to the subtitle language set by the user on the setup screen.
[0072]
Further, according to the present invention, when subtitles are displayed, subtitle display can be automatically turned off when the audio language is switched to an audio stream in the same language as the subtitle language. .
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a subtitle language switching menu screen displayed when a subtitle key is operated.
FIG. 2 is a block diagram showing a configuration of a disk playback device.
FIG. 3 is a flowchart illustrating an example of a processing procedure of a CPU 6 when a setup priority subtitle language switching key is pressed during reproduction.
FIG. 4 is a flowchart showing an example of a processing procedure of the CPU 6 when a setup priority subtitle language switching key is pressed during reproduction when the DVD player has a stream confirmation function using a subtitle language code extension. is there.
FIG. 5 is a flowchart showing an example of a processing procedure of the CPU 6 when an audio stream is switched by an audio stream switching key operation or a DVD menu during reproduction.
FIG. 6 shows a CPU 6 when an audio stream is switched by an audio stream switching key operation or a DVD menu during reproduction when the DVD player has a stream confirmation function using an audio language code extension; It is a flowchart which shows an example of the process sequence of.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drive part 2 AV decoder 3 Memory 4 User interface part 5 On-screen production | generation part 6 CPU
7 Video mixer

Claims (5)

Means for determining whether or not subtitles are being displayed when switching of an audio stream based on an audio stream switching operation is confirmed during optical disc playback;
When subtitles are being displayed, means for determining whether the language of the switched audio stream and the language of the displayed subtitle are the same, and the language of the switched audio stream and the currently displayed subtitle If the language is the same, the subtitle display auto-off means to automatically turn off the subtitle display,
An optical disc reproducing apparatus comprising: Means for determining whether or not subtitles are being displayed when switching of an audio stream based on an audio stream switching operation is confirmed during optical disc playback;
Means for determining whether the language of the switched audio stream and the language of the subtitle being displayed are the same if the subtitle is being displayed;
Means for determining whether or not the audio language code extension of the switched audio stream is a predetermined value when the language of the switched audio stream and the language of the subtitle being displayed are the same; Subtitle display automatic off means for automatically turning off subtitle display when the audio language code extension of the switched audio stream is a predetermined value;
An optical disc reproducing apparatus comprising: When subtitle display is turned off by subtitle display being automatically turned off by subtitle display auto-off means during optical disc playback, when switching of the audio stream based on the audio stream switching operation is confirmed, the optical disk reproducing apparatus according to any one of claims 1 and 2 display the caption display auto-off means, characterized in that it comprises means for automatically displaying the subtitle stream is turned off. When subtitle display is turned off by subtitle display being automatically turned off by subtitle display auto-off means during optical disc playback, when switching of the audio stream based on the audio stream switching operation is confirmed, means subtitle language setup screen is determined whether it is set to a language other than the initial value determined by the optical disc, and the subtitle language setup screen is set to a language other than the initial value determined by the optical disc Means to display a subtitle stream in the same language as the subtitle language set on the setup screen,
The optical disk reproducing apparatus according to any one of claims 1 and 2, characterized in that it comprises a. When subtitle display is turned off by subtitle display being automatically turned off by subtitle display auto-off means during optical disc playback, when switching of the audio stream based on the audio stream switching operation is confirmed, means subtitle language setup screen is determined whether it is set to a language other than the initial value determined by the optical disc, and the subtitle language setup screen is set to a language other than the initial value determined by the optical disc Means for displaying a subtitle stream of the same language as the subtitle language set on the setup screen and having a subtitle language code extension having a predetermined value;
The optical disk reproducing apparatus according to any one of claims 1 and 2, characterized in that it comprises a.

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