JP4037852B2 - Video playback device - Google Patents

Description

  The present invention relates to an information reproducing apparatus, and more particularly to a technique for specifying a reproduction start position of a moving image reproducing apparatus.

2. Description of the Related Art In moving image playback devices, devices that store moving images on a hard disk device or a recordable DVD and can quickly play back the recorded moving images from a specific playback start position have become mainstream. Even in such a device, conventionally, when a user wants to watch a moving image once viewed halfway from another opportunity, it is necessary to specify the playback start position based on the user's memory, It was necessary to reproduce a moving image from the beginning and fast-forward to a desired scene. Further, a means for holding reproduced information that can specify a portion that has been reproduced in the past is disclosed (see, for example, Patent Document 1).
JP-A-11-176096

  However, with the conventional technology, it takes time and effort for the user to search for a scene that is not viewed every time playback is performed using fast-forwarding or the like. On the other hand, the technique described in Patent Document 1 has a problem that only whether or not playback has been performed is recorded, and detailed determination cannot be made as to whether or not the user has actually seen it.

  For example, if the user leaves the seat or falls asleep during playback, the moving image is automatically played to the end. In such a case, when the technique described in Patent Document 1 is used, it is recorded as being played back, and although it is actually a scene that the user has not seen, the playback start position is specified or played back. Therefore, there is a problem that it becomes an erasure target.

  It is an object of the present invention to provide a moving image playback apparatus that can quickly search for a scene that the user has not seen and can make a more detailed determination.

  When the user is viewing the reproduced image, it is considered that some key operation is performed. Therefore, the present invention includes a key operation detection unit, and records the presence / absence of a key operation in a frame in which the key operation was performed during moving image reproduction. Further, there is provided means for starting reproduction after detecting the last frame to which a flag is added during reproduction and skipping to that point. Further, the apparatus further comprises means for clearing (erasing) the set flag. Furthermore, when the flag is not added to the end of the file, it is characterized in that it is confirmed whether or not the user has actually seen the reproduction information.

  According to the present invention, there is provided a moving image playback apparatus capable of quickly searching for and playing back a scene that the user has not seen at the next playback by recording the presence or absence of a user's key operation as a flag, for example, in a frame. realizable.

  The moving picture reproducing apparatus according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a functional block diagram illustrating a configuration example of a moving image reproduction apparatus according to the present embodiment. FIG. 2 is a flowchart showing the flow of processing at the time of reproduction by the moving picture reproducing apparatus according to the present embodiment. FIG. 3 is a flowchart showing the flow of processing during playback of a previously played video file according to this embodiment. FIG. 4 is a diagram showing an example of adding a key operation flag for a moving image file according to the present embodiment.

  As shown in FIG. 1, the moving picture reproducing apparatus according to the present embodiment includes a control unit 101 that controls the whole, a DMA controller 102, a memory 103 that stores a flag to be described later, an image compression / decompression unit 104, and a built-in unit. Keys for detecting key operations from a known large-capacity recording medium 105 such as a hard disk or a DVD-R (W), a display 106 such as an LCD display, and an operation unit attached to the main body or performing various operations by remote control An operation detection unit 107, a skip switch 108 described later, and a clear switch 109 are provided. The reproduction flag storage unit will be described in the second embodiment. Note that the key operation flag is stored in the storage unit 103 in the above case, but other methods may be used. For example, the key operation flag may be stored in a moving image file recorded on the recording medium 105. When the recording medium 105 is not removable, it is preferably stored in another memory 103.

  A reproduction operation relating to the moving image reproduction apparatus shown in FIG. 1 will be described with reference to the flowchart of FIG. A case where a moving image file to be reproduced for the first time or a moving image file in which a key operation flag described later is cleared will be described. When the playback operation is started in step S 1, one moving image file recorded on the recording medium 105 is stored in the memory 103 via the DMA controller 102. Next, the header information is read from the memory 103 to the control unit 101, and the recorded shooting start time is read. The image data written in the memory 103 is sent from the memory 103 to the image compression / decompression unit 104 via the DMA controller 102, decompressed, and stored in the memory 103 again. Next, the decompressed data from the memory 103 is sent to the display 106 via the DMA controller 102 and displayed (step S2).

  At the same time, the decompressed data recorded in the memory 103 is read out to the image compression / decompression unit 104 via the DMA controller 102 and subjected to compression processing. The compressed data is temporarily stored in the memory 103 and then recorded on the recording medium 105 after adding header information according to a predetermined format by the control unit 101. Here, the key operation detection unit 107 detects whether or not the user has performed various key operations such as volume change, fast forward, rewind, and stop (step S3). If a key operation is detected by the key operation detection unit 107 in step S3 (Yes), the process proceeds to step S4, and the key operation flag is set in the corresponding frame when recording a moving image of each frame. Recording in the memory 103, the process returns to step S2. If “NO” in step S3, the decompressed data in the memory 103 is compressed by the image compression / decompression unit 104, and the control unit 101 records it on the recording medium 105 without setting the key operation flag (step S5). . Next, the process returns to step S2.

  As a result of the above processing, when the key operation flag is set as shown in FIG. 4, the frames actually played up to the final time point when the key operation flag is set, and the frames viewed by the user are displayed. It can be estimated that. That is, as shown in FIG. 4, in the time series data 1 of a certain moving image, the key operation flags F1 to F6 are respectively set in time series from time t1 to time t6, and the key operation flag is not raised thereafter. In this case, a time t7 slightly later than the final time t6 is defined as a boundary time between the viewed period 3 and the non-viewed period 5.

  Next, the operation in the case of reproducing a moving image file that has been reproduced once or more will be described with reference to the flowchart of FIG. The moving image file to be reproduced is a moving image file to which the key operation flag shown in FIG. 4 is added. The moving image file described here assumes a case in which the user fast-forwards for each CM from the start during moving image reproduction and falls asleep from the middle. Since the normal reproduction operation is the same until the user presses the skip switch 108, the description is omitted. If the user presses the skip switch 108 during playback in step S11 (step S12), the control unit 101 temporarily stops the playback operation (step S13). Next, the reproduction operation is resumed, the last frame to which the key operation flag set in the memory 103 is added is determined, and the last frame which is recorded on the recording medium 105 and has the key operation flag set. The moving image data is read from (the beginning of the frame including time t7 or a frame several frames before the designated frame), and is displayed on the display 106 via the memory 103 and the image compression / decompression unit 104 (step S14). By pressing the skip switch 108 in this way, it is possible to easily skip to the scene where the user last operated the key.

  As described above, in the moving image playback apparatus according to the present embodiment, it is possible to estimate whether or not the user was actually viewing the moving image during playback based on the presence or absence of a key operation by the user. There is an advantage that it is possible to easily specify the reproduction start position indicating whether or not the reproduction is started from the time point.

  Next, a moving picture reproducing apparatus according to a first modification of the present embodiment will be described with reference to the drawings. In the moving picture reproducing apparatus according to the present modification, only the last flag (F6 in FIG. 4) is recorded among the flags F1 to F6 shown in FIG. 4, and the flag immediately after that is generated by the flag immediately after that. It can also be erased sequentially. With this configuration, it is possible to reduce processing related to flag storage and occupied capacity.

  Next, a moving image playback apparatus according to a second modification of the present embodiment will be described. In the moving image playback apparatus according to this modification, instead of setting an operation flag by the operation key for each frame, if there is a change related to the playback speed, that fact is recorded in association with the frame. It is characterized by that. For example, when there is a large fluctuation in the playback speed, it is considered that the user has operated with an operation key or the like, and a mark indicating that the user was watching at the time of playback is attached. In this case as well, when the final change occurs, the mark may be used as a mark and the reproduction may be performed again shortly before that.

  Next, a moving picture reproducing apparatus according to the second embodiment of the present invention will be described with reference to the drawings. The moving image reproducing apparatus according to the present embodiment includes a clear switch 109 shown in FIG. When the clear switch 109 is pressed, all the key operation flags of the moving image file are cleared. There is an advantage that it is possible to handle the same as a file to be played for the first time when another user views a video file that has already been played several times by a user.

  Next, a moving picture reproducing apparatus according to the third embodiment of the present invention will be described. When the reproduction is finished up to the last frame in step S6 shown in FIG. 2, it is judged whether or not the user has finished the reproduction without performing the key operation until the last frame, and it is judged that the reproduction has been completed without performing the key operation. As an example of the process in the case of the display, an OSD display such as “Did you actually see it?” Is performed to wait for a key input from the user for this display (step S7). When “Yes” is selected in the key input from the user, the file being reproduced is recorded as “reproduced” (step S8). On the other hand, if “No” is selected or if there is no key input for a certain period of time, it is assumed that the user has left his / her seat or is sleeping. ”So as not to be an object of erasure (step S9). In this case, even when the user presses the skip switch 108, the moving image file is reproduced from the first frame regardless of this. In the moving image playback device according to the present embodiment, it is possible to finally determine whether or not the user actually viewed the video based on the user's intention when there is no input using the operation keys. It can be performed.

  Next, a moving picture reproducing apparatus according to the fourth embodiment of the present invention will be described. The moving image reproduction device according to the present embodiment is characterized in that, when a key operation is performed while a moving image is being reproduced, information on the content of the key operation is stored along with the key operation. To do. The contents of the key operation are characterized in that, for example, it is determined whether or not to store as a flag according to the operation contents, such as a reproduction pause key, a reproduction start key, a fast forward key, and a rewind key. For example, when the playback start key is pressed after the pause key, fast-forward key, etc. are operated, the operation of the pause key can be ignored, and the flag is deleted. When the playback start key is pressed after the rewind key is pressed, it is predicted that the user has watched again after rewinding because the previous playback portion before the time when the rewind key was pressed is not seen. Therefore, the flag when the rewind key is pressed may be deleted. In this way, the flag may be set in consideration of the meaning of the operation flag and the relationship before and after.

  Next, a moving picture reproducing apparatus according to the fifth embodiment of the present invention will be described. In the moving image reproduction apparatus according to the present embodiment, the reproduction flag storage unit 110 in FIG. 1 stores the reproduction completion flag and also stores the operation key flag, and starts reproduction again based on both the flags. It is characterized by specifying the playback start position. In other words, whether or not the user is actually viewing is roughly determined based on the playback flag, and the operation start flag is recorded in detail based on the operation key flag. There is an advantage that there is no need to do. It should be noted that whether or not to record each flag according to the present embodiment is preferably selectable by a selection switch.

  As described above, according to each embodiment of the present invention, when the user is viewing the playback image, it is assumed that some key operation is performed, and by recording the presence / absence of the user's key operation in the frame, A moving image reproduction apparatus capable of quickly searching and reproducing a scene that the user has not seen can be realized.

It is a functional block diagram which shows the structural example of the moving image reproducing device by embodiment of this invention. It is a flowchart figure at the time of reproduction | regeneration in the moving image reproduction device by embodiment of this invention. It is a flowchart figure at the time of reproducing | regenerating again the moving image file which was reproduced | regenerated once or more in the moving image reproducing device by embodiment of this invention. FIG. 5 is a diagram exemplarily showing a state in which a key operation flag of a moving image file is added in the moving image reproduction apparatus according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Control part, 102 ... DMA controller, 103 ... Memory, 104 ... Image compression / expansion part, 105 ... Recording medium, 106 ... Display, 107 ... Key operation detection part, 108 ... Skip switch, 109 ... Clear switch

Claims (7)

A moving image reproducing apparatus having a key operation unit, a recording medium for recording moving images, a reproduction processing unit for reproducing moving images recorded on the recording medium, and a storage unit,
A key operation detection unit for detecting a key operation from the key operation unit during reproduction by the reproduction processing unit; a frame in which the key operation has been performed during moving image reproduction; and a key operation flag indicating that the key operation has been performed. when the recording control unit that performs control to record in the storage unit, have a, it is determined that there is a key operation by the key operation flag stored in the storage unit in association, in the storage unit A moving image reproducing apparatus, wherein a frame corresponding to the key operation flag is estimated as a viewing frame viewed by a user .   2. The moving image reproducing apparatus according to claim 1, further comprising skip means for performing control to reproduce from the last frame stored in the storage unit and to which the key operation flag is added.   The recording control unit records a final key operation flag among the key operation flags recorded during reproduction in the storage unit, and key operation flags previously stored in the storage unit are The moving image reproducing apparatus according to claim 1, wherein a process of sequentially erasing with the storage of the final key operation flag is performed.   The moving image reproducing apparatus according to claim 1, further comprising means for collectively clearing the key operation flags stored in the storage unit.   5. The moving image according to claim 1, further comprising a final confirmation unit configured to confirm with a user whether or not the key operation flag is actually viewed when the key operation flag does not exist until the end of the file. Image reproduction device.   The recording control unit performs control to store information on the contents of the key operation in the storage unit in association with the key operation flag when there is a key operation while reproducing a moving image. The moving image reproducing apparatus according to claim 1, wherein: The recording control unit, the frame performs the control for storing the reproducing flag regarding whether already reproduced, on the basis of said operation key flag and the reproducing flag, the last frame in which only the operation key flag when the remaining 7. The moving image playback apparatus according to claim 1, wherein the playback start frame position is set to a playback start frame position at which playback is started again.

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