JP2008219775A - Disc player - Google Patents

Abstract

An object of the present invention is to prevent discontinuity or variation of a still image after canceling a prestop when a prestop operation is performed in a slide show playback mode.
Information recorded on a disk medium is read by a pickup unit, image / audio data is reproduced from the read information, and a sequence end code included in a VOBU recorded on the disk medium is detected. A data playback unit, a video / audio decoder that decodes still image data and audio data and supplies them to a display unit and an audio output unit to enable playback of a slide show, an operation unit that can be operated by a user, and a disk medium A control unit that determines slide show reproduction by detecting a sequence end code during reproduction and controls a display form in a slide show reproduction mode in response to an operation of the operation unit.
[Selection] Figure 1

Description

The present invention relates to a disk playback apparatus that plays back information recorded on a DVD (Digital Versatile Disk) that is a disk medium, and more particularly to a disk playback apparatus that enables playback of a slide show.

  2. Description of the Related Art In recent years, disk reproducing apparatuses that record information such as audio signals and video signals on an optical disk medium (hereinafter referred to as DVD) conforming to the DVD-Video standard or DVD-Audio standard and reproduce the information have become widespread. One of the playback processing functions of such a disc playback apparatus is a slide show function.

  A slide show is a program that decodes slide show still image signals and audio signals recorded in the DVD-Video and DVD-Audio video zones, and reproduces audio at the same time while displaying still images. This is a function for switching and displaying still images every time. Slide show playback is suitable for in-vehicle playback equipment and the like because music is important and changes in video are small.

  Patent Document 1 describes an example of an information reproducing apparatus having a slide show function.

  Incidentally, some conventional disk reproducing apparatuses have a pre-stop function (PRE-STOP). The pre-stop function operates the stop button during video playback or slide show playback, and when the stop button is pressed once, the playback position is memorized, the currently displayed image is erased, and the sound is stopped. Then, the playback is resumed from the stopped position by pressing the playback button. Note that the playback can be completely stopped by pressing the stop button twice or for example for 2 seconds or more.

  FIG. 7 is a timing chart for explaining a slide show playback operation in a conventional disc playback apparatus, where (a) shows a normal slide show mode, and (b) shows an operation when the slide show is restarted after a pre-stop operation. Is shown.

  In FIG. 7, the horizontal axis indicates the time axis. The slide image still image data (S1, S2,... Sn) has navigation information stored on the disk medium so that it is reproduced at predetermined time intervals.

  When the slide show is reproduced, the still image data (S1, S2,... Sn) recorded at predetermined intervals are sequentially read as shown in FIG. 7A, and the same still image is read until new still image data is read. Is displayed repeatedly. At this time, the audio signal A1 is reproduced without interruption.

  On the other hand, when the slide show is pre-stopped, as shown in FIG. 7B, the playback return point is stored at the pre-stop operation timing T1, the image is erased, and the sound playback is stopped. Thereafter, when the slide show is resumed, the playback is started from the position where the pre-stop is again performed by pressing the playback button.

  However, when playback is attempted again from the pre-stop location T1, no still image data is recorded at the playback return location, so the audio remains in a non-image state until the next still image update timing T2 is reached. Only play. In the case of moving image reproduction, when pre-stop is performed and then reproduction is performed from the same position, both the corresponding image and audio data exist, so there is no problem even if the reproduction is restored.

As described above, when the slideshow is prestopped during playback and then played back, there is a problem that the display of the still image is temporarily interrupted. In order to solve this problem, a method of reproducing from the position of a nearby still image at the time of resuming reproduction can be considered. For example, when the pre-stop is canceled at t1 in FIG. 7B, playback is started after returning to the recording position of the still image data S1, and when the pre-stop is canceled at t2, the recording position of the still image data S2 Return to and start playback. However, even if such a method is adopted, reproduction is restored from a point different from the point where the user has pre-stopped, which gives a sense of incongruity.
Republished patent publication WO 2004/114657

  In a conventional disc playback device, when a pre-stop operation is performed during slide show playback and then playback is performed, the display of still images is temporarily interrupted, or playback resumes from the point where the user pre-stopped. , There is a drawback that the user feels uneasy or uncomfortable.

  In view of such circumstances, the present invention prevents disc breaks and variations of still images after canceling pre-stop, and disc playback that notifies an appropriate message when a pre-stop operation is performed during slide show playback. An object is to provide an apparatus.

  According to a first aspect of the present invention, there is provided a disc reproducing apparatus according to the present invention, a pickup unit for reading information recorded on a disc medium, and reproducing image / audio data from the information read by the pickup unit, and recording the information on the disc medium. A data playback unit that detects a sequence end code (Sequence_end_code) included in the video object unit (VOBU), a display unit that decodes still image data and audio data played back by the data playback unit, and A video / audio decoder that is supplied to the audio output unit and enables playback of the slide show, an operation unit that can be operated by the user, and the sequence end code is detected during playback of the disc medium to detect the slide show. A reproduction discrimination is performed, and the slice is responded to the operation of the operation unit. A control unit for controlling the display form of the reproduction mode of the show, characterized by comprising comprises a.

 According to a fourth aspect of the present invention, there is provided a disc reproducing apparatus according to the present invention, a pickup unit for reading information recorded on a disk medium, reproducing image / audio data from the information read by the pickup unit, and A data reproduction unit for detecting a sequence end code (Sequence_end_code) included in a recorded video object unit (VOBU), and still image data and audio data reproduced by the data reproduction unit are decoded and displayed. A video / audio decoder that is supplied to a video output unit and an audio output unit to enable playback of a slide show, an operation unit that can be operated by a user, and detecting the sequence end code during playback of the disc medium, The slide show playback mode is determined, and based on the determination result, Characterized by comprising a control unit for notifying the message to the reproduction mode of the slide show.

  The disc playback apparatus of the present invention can display a still image with no sense of incompatibility when the prestop operation is canceled in the slide show playback mode. In the slide show playback mode, an appropriate message can be notified when a pre-stop operation is performed.

  Hereinafter, an embodiment of a disk reproducing apparatus of the present invention will be described with reference to the drawings.

 FIG. 1 is a block diagram showing the overall configuration of a disc playback apparatus 100 of the present invention. In FIG. 1, reference numeral 1 denotes a disk medium (DVD), which is rotated by a motor 2 at a constant linear velocity. Information recording and reproduction with respect to the disk medium 1 are performed by the optical pickup 3. The optical pickup 3 is driven in the radial direction of the disk medium 1 by a linear motor 4, and the linear motor 4 is controlled by a linear motor control circuit 5.

 The optical pickup 3 is provided with an objective lens 31. The objective lens 31 is moved in the focusing direction (the optical axis direction of the lens 31) and the tracking direction (the direction orthogonal to the optical axis of the lens 31) by the actuator 32. Movement is controlled.

  Information writing to the disk medium 1 is performed by irradiating the disk medium 1 with a light beam emitted from the semiconductor laser oscillator 33 via the beam splitter 34. Reading (reading) information from the disk medium 1 is performed as follows. The reflected light from the disk medium 1 is guided to the photodetector 37 through the objective lens 31, the beam splitter 34, the condenser lens 35, and the cylindrical lens 36.

  The semiconductor laser oscillator 33 is driven and controlled by the laser control circuit 6, and the light beam emitted from the semiconductor laser oscillator 33 is irradiated onto the disk medium 1 via the collimator lens 38, the beam splitter 34, and the objective lens 31. The laser control circuit 6 controls the light beam emitted from the semiconductor laser oscillator 33 according to recording / reproduction.

  The photodetector 37 is composed of, for example, four-divided photodetector cells, and the output signal of each photodetector cell is supplied to the signal processing circuit 38 via an amplifier for current / voltage conversion. The signal processing circuit 38 outputs a focus control signal, a tracking control signal, and a data reproduction signal based on the output signal of the photodetector 37.

  The focus control signal is supplied to the focusing control circuit 7, and the output signal of the focusing control circuit 7 is supplied to the actuator 32. As a result, control is performed so that the light beam is always just focused on the disk medium 1.

The tracking control signal is supplied to the tracking control circuit 8. The tracking control circuit 8 creates a track drive signal and supplies it to the actuator 32. Thereby, the movement of the optical pickup 3 in the tracking direction is controlled. The track drive signal from the tracking control circuit 8 is also supplied to the linear motor control circuit 5.
When the objective lens 31 is moved by the tracking control circuit 8, the optical pickup 3 is moved so that the objective lens 31 is positioned near the center position in the optical pickup 3 by controlling the motor 4 by the linear motor control circuit 5. Be controlled. The motor 2 is controlled by a motor control circuit 9.

  Further, a signal for data reproduction from the signal processing circuit 38 is supplied to the data reproduction circuit 11 via the amplifier circuit 10. The data reproduction circuit 11 digitizes the output of the amplifier circuit 10 and reproduces the recorded data based on the reproduction signal from the PLL circuit 12 from the digitized signal.

  The linear motor control circuit 5, the laser control circuit 6, the focusing control circuit 7, the tracking control circuit 8, the motor control circuit 9, the data reproduction circuit 11, and the PLL circuit 12 are connected to the bus 13, and these circuits are connected via the bus 13. Are controlled by the controller 14.

  The controller 14 includes a CPU 141, and the CPU 15 performs a predetermined operation according to a program recorded in the ROM 15. A RAM 16 is connected to the bus 13 so as to store data processed by executing the program.

  Further, an operation unit 17 and a video / audio decoder 18 are connected to the bus 13. The operation unit 17 is operated by a user and includes, for example, a playback button 171, a stop button 172, a fast reverse button 173, a fast forward button 174, a power button 175, and the like.

  The video / audio decoder 18 decodes the video signal and the audio signal from the data reproduced by the data reproduction circuit 11, supplies the video signal to the display unit 19, and supplies the audio signal to the audio output unit (speaker) 20. The video / audio decoder 18 generates video and audio signals in a mode corresponding to normal playback or slide show playback under the control of the controller 14 in response to the operation of the operation unit 17. The video / audio decoder 18 is connected to a storage unit (memory) 21.

  The disc playback apparatus 100 of the present invention detects a sequence end code (Sequence_end_code) included in the video object unit (VOBU) of the disc medium 1 to determine that it is a slide show playback mode, and It is characterized in that the processing when the stop operation is performed is different from the normal processing and that the user is visually informed that the slide show is being reproduced.

  FIG. 2 is a diagram showing a hierarchical structure of DVD data, and is a diagram for explaining a sequence end code.

  The hierarchical structure of data recorded on the disc medium 1 (DVD 1) is determined in accordance with the DVD-V standard. As shown in FIG. 2, the DVD video area includes a video manager (VMG) and a number of data. Video title set (VTS) data is recorded. The VMG describes data for managing the VTS, and the contents of the VMG are stored in the controller 14.

  VTS includes video title set information (VTSI), video title set menu video object set (VTSM_VOBS), video title set title video object set (VTSTT_VOBS), and backup of video title set information (VTSI_BUP). ) Etc.

  VTSTT_VOBS is composed of a plurality of video object identification numbers (VOB_IDN), and the hierarchical structure of data included in VOB_IDN is composed of a plurality of cells.

  The Cell is composed of a plurality of video object units (VOBU). The VOBU includes a navigation pack (NV_PCK), an audio pack (A_PCK), a video pack (V_PCK), and a sub-picture pack (SP_PCK). It is constituted by. A plurality of V_PCK, A_PCK, and SP_PCK are included in the VOBU. In V_PCK, A_PCK, and SP_PCK, data such as video data, audio data, and captions is individually compressed and encoded and recorded.

  One NV_PCK is always included in the VOBU, and the NV_PCK is composed of a presentation control information packet (PCI_PKT), a data search information packet (DSI_PKT), and the like. Additional information for smoothly performing normal reproduction and special reproduction processing is recorded.

  Further, PCI_PKT describes PCI which is navigation data for controlling playback of VOBU, and a sequence end code (Sequence_end_code) is recorded in PCI.

  The sequence end code describes the reproduction end time of the video data in the VOBU. In the case of a moving image, the image data is always updated, and is a code added only to the final image. In the case of a slide show, since there is a time interval until the next still image, this code is always used to indicate the end of the still image. Therefore, if the sequence end code can be detected from the VOBU being reproduced, it can be determined that the slide show is being reproduced.

  The present invention pays attention to this point, and performs various processes by detecting a sequence end code during reproduction of the disk medium 1. The sequence end code can be detected by the data reproducing circuit 11 and the detection result is transmitted to the controller 14. The controller 14 controls the video / audio decoder 18 in response to the detection result, and constitutes a control unit for notifying various messages.

  In the following description, the sequence end code (Sequence_end_code) is abbreviated as an end code for convenience.

  FIG. 3 is a diagram for explaining the slide show playback mode of the disc playback apparatus 100 of the present invention. Still image data (S1, S2, S3... Sn) for a slide show is recorded on the disk medium 1 at predetermined time intervals, and is recorded during a still image display update timing period. The audio data A1 is continuously recorded.

  Therefore, when the playback button 171 is operated and a VOBU having an end code recorded on the disc medium 1 is played, playback by a slide show is executed. At this time, still image data (S1, S2, S3... Sn) recorded at predetermined intervals are sequentially read, and the previous still image is repeatedly displayed until the next still image data is read. The audio signal A1 is reproduced without interruption. Further, since the above-described end code is detected, the controller 14 determines that the slide show mode is set using the detection result.

  On the other hand, when the operation unit 17 is operated and the stop button 172 is pressed only once, the slide show is pre-stopped. The pre-stop timing is, for example, T1. The reproduction return point is stored in the RAM 16 at the pre-stop operation timing T1, and the still image data S1 displayed at that time is written in the storage unit (memory) 21 and temporarily stored.

  Next, when the playback button 171 is operated (for example, at timing t1), the slide show is resumed, and the still image data S1 written in the memory 21 is read at timing T1. Thereby, the still image when pre-stopped is repeatedly displayed on the display unit 18. When the next still image data S2 is read from the disk medium 1, a new still image is displayed after the timing T2. An audio signal is also reproduced at the same time.

  FIG. 4 is a diagram for explaining another playback mode in the slide show of the disc playback apparatus 100 of the present invention.

  In FIG. 4, when the playback button 171 is operated and a VOBU having an end code recorded on the disk medium 1 is played back, playback by a slide show is executed. Further, since the above-described end code is detected, the controller 14 determines that the slide show mode is set using the detection result.

  On the other hand, when the operation unit 17 is operated and the stop button 172 is pressed only once, the slide show is pre-stopped. For example, when the pre-stop timing is T1, normal pre-stop processing is not performed, but a pause (Pause) state is set, and a display image at the time of pre-stop is covered and displayed. At this time, the sound stops. Therefore, although it is in the pre-stop state, the actual operation is in a pause state.

  When the playback button 171 is operated next (for example, at timing t1), the pause state is maintained until the next still image data S2 is read from the disk medium 1, and the still image data S2 is read at the timing T2 to newly A still image is displayed. The audio signal is reproduced from the pause position immediately after the reproduction button 171 is operated.

  Thus, according to the present invention, it is possible to display a still image without a sense of incongruity when the prestop operation is released. An audio signal is also reproduced at the same time.

  5 and 6 are diagrams for explaining a second embodiment of the disk reproducing apparatus 100 according to the present invention, and for explaining another reproduction mode in a slide show.

  In this embodiment, when the above-described end code is detected during reproduction of the disk medium 1, the controller 14 determines that the slide show mode is in use using the detection result, and sends a message to the display unit 18 to the user. Is displayed.

  That is, when a VOBU having an end code is reproduced, the controller 14 determines that the slide show mode is in effect, and displays a display M 1 such as “playing slide show” as the current reproduction mode on the display unit 18.

  In addition, when a pre-stop operation is performed during slide show reproduction, the user is allowed to select a pre-stop operation.

  That is, as shown in FIG. 5, a message indicating that the pre-stop operation is prohibited during slide show playback, for example, a message M2 such as “Cannot pre-stop during slide show playback” is displayed. Do not accept operations.

  Alternatively, as shown in FIG. 6, when the pre-stop operation is performed during the slide show reproduction, a message M3 such as “Image may be mutated when the slide show is resumed” is displayed to notify the user in advance. is there. At this time, for example, the slide show is restarted as described with reference to FIG. 7B. However, since the user has already understood, the sense of discomfort can be reduced.

  Further, the user may select whether to display the message M2 as shown in FIG. 5 or the message M3 as shown in FIG. 6, and may be preset to display the selected message.

  As described above, the disc playback apparatus of the present invention can prevent an operation unintended by the user due to a pre-stop operation during slide show playback.

  In the above description, the pre-stop mode is described by pressing the stop button 172 once. However, a dedicated button for pre-stop may be provided, and the button arrangement of the operation unit 17 is arbitrary. .

  In the example of FIG. 6, an example in which a message such as “Image may be mutated” is displayed when the slide show is resumed, but a graphical user interface (GUI) is added and the display unit 18 is displayed. Further, “Do you want to execute pre-stop”, “Yes”, “No” or the like may be displayed so that the user can select.

  The present invention is not limited to the above description, and various modifications can be made without departing from the scope of the claims.

1 is an overall configuration diagram showing an embodiment of a disc playback apparatus of the present invention. FIG. 3 is an exemplary view for explaining a hierarchical structure of data recorded on the disk medium according to the embodiment. Explanatory drawing explaining the reproduction | regeneration operation | movement of a slide show in the embodiment. Explanatory drawing explaining another reproduction | regeneration operation | movement of a slide show in the embodiment. Explanatory drawing explaining the reproduction | regeneration operation | movement of the slide show in other embodiment of the disc reproducing | regenerating apparatus of this invention. Explanatory drawing explaining another reproduction | regeneration operation | movement of a slide show in other embodiment. Explanatory drawing explaining the reproduction | regeneration operation | movement of a slide show in the conventional disc reproduction | regeneration apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Disk medium 2 ... Motor 3 ... Optical pick-up 4 ... Linear motor 5 ... Linear motor control circuit 6 ... Laser control circuit 7 ... Focusing control circuit 8 ... Tracking control circuit 9 ... Motor control circuit 10 ... Amplifier circuit 11 ... Data reproduction circuit 12 ... PLL circuit 13 ... bus 14 ... controller 15 ... ROM
16 ... RAM
17 ... Operation unit 18 ... Video / audio decoder 19 ... Display unit 20 ... Audio output unit 21 ... Storage unit

Claims (8)

A pickup section for reading information recorded on a disk medium;
Data for reproducing image / sound data from information read by the pickup unit and detecting a sequence end code (Sequence_end_code) included in a video object unit (VOBU) recorded on the disk medium A playback unit;
A video / audio decoder that decodes still image data and audio data reproduced by the data reproduction unit and supplies the decoded data to a display unit and an audio output unit;
An operation unit operable by a user;
A control unit that performs playback determination of the slide show by detecting the sequence end code during playback of the disk medium, and controls a display mode in the playback mode of the slide show in response to an operation of the operation unit; A disc reproducing apparatus comprising: The control unit controls the video / audio decoder in response to an operation of the operation unit,
When a reproduction operation is performed by the operation unit, the still image data recorded on the disk medium is sequentially read to reproduce the slide show,
When a pre-stop operation is performed by the operation unit, the slide show playback is stopped, and the still image data played before the stop is stored in the storage unit,
2. The disc reproducing apparatus according to claim 1, wherein when the pre-stop mode is canceled, the still image data stored in the storage unit is read and reproduced. The control unit controls the video / audio decoder in response to an operation of the operation unit,
When a reproduction operation is performed by the operation unit, the slide image is reproduced by sequentially reading still image data recorded on the disk medium,
When the pre-stop operation is performed by the operation unit, the still image data reproduced before the pre-stop operation is displayed in a pause state,
2. The disc reproducing apparatus according to claim 1, wherein when the pre-stop mode is canceled, the pause state is maintained until new still image data is read. A pickup section for reading information recorded on a disk medium;
Data for reproducing image / sound data from information read by the pickup unit and detecting a sequence end code (Sequence_end_code) included in a video object unit (VOBU) recorded on the disk medium A playback unit;
A video / audio decoder that decodes still image data and audio data reproduced by the data reproduction unit and supplies the decoded data to a display unit and an audio output unit;
An operation unit operable by a user;
A control unit that determines the slide show playback mode by detecting the sequence end code during playback of the disc medium, and notifies a message in the slide show playback mode based on the determination result; A disc player characterized by that.  5. The disc reproducing apparatus according to claim 4, wherein the control unit displays a message indicating that the slide show is being reproduced on the display unit based on the determination result. The control unit controls the video / audio decoder in response to an operation of the operation unit,
When a reproduction operation is performed by the operation unit, the still image data recorded on the disk medium is sequentially read to reproduce the slide show,
5. The disc reproducing apparatus according to claim 4, wherein when a pre-stop operation is performed by the operation unit, a message suggesting that the pre-stop operation is impossible is displayed during reproduction of the slide show. The control unit controls the video / audio decoder in response to an operation of the operation unit,
When a reproduction operation is performed by the operation unit, the still image data recorded on the disk medium is sequentially read to reproduce the slide show,
5. The disk reproducing apparatus according to claim 4, wherein when a pre-stop operation is performed by the operation unit, a message indicating a possibility that a variation occurs in an image after canceling the slide show is displayed.  5. The control unit according to claim 4, wherein the control unit is configured to prepare a plurality of messages to be notified when a pre-stop operation is performed by the operation unit, and to display a message selected by the user. Disc playback device.

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