JP4807328B2 - Playback device - Google Patents

Description

  The present invention relates to a playback apparatus that can change a playback speed when playing back video data, and in particular, can easily determine an appropriate playback speed during slow playback.

  In recent years, playback devices such as HDD / DVD recorders that can play back video data stored in a large-capacity storage medium such as a DVD (Digital Versatile Disc) or a hard disk have become widespread. Such a playback apparatus generally has a special playback function that can change the playback speed when playing back video data stored in a storage medium. For example, there are fast forward / fast reverse playback, slow playback, frame advance playback, and the like.

  In the playback apparatus, depending on the type of video content stored in the storage medium, the user may be able to edit the video data himself. For example, after recording a program provided by television broadcasting on a storage medium, a user performs an editing operation of deleting video such as a main part of a program by deleting an extra video such as a CM. In this editing operation, slow playback is often used when setting the cutout position of video data.

As a technique related to special reproduction of the reproduction apparatus, there are techniques described in Patent Documents 1 to 3.
For example, Patent Document 1 acquires information about a video from a video storage device, and simultaneously acquires the acquired video at different playback speeds (for example, 1, 2, and 4 times speed) in a plurality of windows displayed on one screen. A technique for displaying is disclosed.
Patent Documents 2 and 3 disclose a technique for simultaneously reproducing a plurality of moving image data, displaying each reproduced image on a plurality of sub-screens, and a technique for adjusting a reproduction speed on each sub-screen. ing.
JP 2005-352933 A JP 2006-114161 A Japanese Patent Laid-Open No. 10-228758

  By the way, in the above-described editing work, when video data is slowly played back, it is considered that an appropriate slow playback speed differs depending on the editing accuracy desired by the user. In other words, if you want to set the exact cutout position of the video data (for example, almost in units of frames), it is desirable to slow down the slow playback speed, and if you want to edit efficiently even if some unnecessary video is included There is no need to slow down the slow playback speed.

  However, since it is not possible to easily determine an appropriate slow playback speed in a conventional playback device, the user searches for and determines an appropriate playback speed while sequentially changing the slow playback speed.

  Moreover, since the above-mentioned patent documents 1 to 3 are techniques for efficiently searching for desired video data from a plurality of video data, they are intended for fast-forward playback. Therefore, there is no description or suggestion about slow playback. In addition, in order to improve the convenience at the time of slow playback, it is considered that the prior application technique cannot be easily conceived.

  It is an object of the present invention to provide a playback apparatus that can change the playback speed when playing back video data stored in a storage medium and can easily determine an appropriate playback speed during slow playback.

  In order to achieve the above object, the invention described in claim 1 reproduces video data stored in a storage medium (for example, a hard disk), and control for controlling the reproduction speed of the video data by the reproduction means. And the control means is slower than the original reproduction speed (for example, 30 frames / second) based on the one video data stored in the storage medium by the reproduction means, A plurality of playback images that are played back at a plurality of different playback speeds (1/2 times, 1/3 times, and 1/4 times speed) are displayed on one screen on the display means, and a predetermined operation signal is input from the operation means. The one video data is played back at a playback speed corresponding to a playback video selected from the plurality of playback videos.

  According to a second aspect of the present invention, in the reproduction apparatus according to the first aspect, the control means repeatedly displays the plurality of reproduced videos in a predetermined area within the same screen.

  According to a third aspect of the present invention, in the playback apparatus according to the second aspect of the present invention, the control means plays back a predetermined time length of one video data stored in the storage medium at different playback speeds. The plurality of reproduced videos having different values are repeatedly displayed at the same reproduction start timing.

  According to a fourth aspect of the present invention, in the playback apparatus according to the second aspect, the control means plays back different time lengths of one video data stored in the storage medium at different playback speeds. The plurality of reproduced videos having the same number are repeatedly displayed.

  According to a fifth aspect of the present invention, there is provided a playback apparatus comprising: playback means for playing back video data stored in a storage medium; and control means for controlling a playback speed of the video data by the playback means. The means is a plurality of playback videos having different playback times, each of which is played back at a different slow playback speed by a predetermined time length of one video data stored in the storage medium by the playback means, or stored in the storage medium. A plurality of playback videos having the same playback time, which are played back at different slow playback speeds for a different time length of the same video data, are repeatedly displayed in a predetermined area within the same screen of the display means, The one video data is played back at a playback speed corresponding to the playback video selected from the plurality of playback videos based on the input of the operation signal. And features.

  According to the present invention, since a plurality of playback videos obtained by playing back video data stored in a storage medium such as a hard disk at different playback speeds are displayed on one screen (slow playback speed selection screen), the user can select the playback speed. Differences can be compared and the appropriate playback speed for slow playback can be easily determined. Further, on the slow playback speed selection screen, the user can select a desired slow playback speed by an extremely simple operation, and video data can be played back at the selected playback speed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram functionally showing each component incorporated in a hard disk recorder 1 as an embodiment of a playback apparatus according to the present invention.

  The HDD recorder 1 of this embodiment includes a control unit 11, a receiving unit (tuner) 12, an operation unit 13, a hard disk drive (HDD) 14, a video decoder 15, an audio decoder 16, a buffer 17, a video signal output unit 18, an audio signal. An output unit 19 is provided, and each block is electrically connected via a bus 20.

  The receiving unit 12 receives a digital television broadcast signal corresponding to a desired channel via an antenna and separates the digital television broadcast signal into video data and audio data.

The operation unit 13 is a remote control device on which various operation buttons provided on the front panel of the HDD recorder 1 and a plurality of operation buttons are arranged.
The HDD 14 records video / audio data on a hard disk as a storage medium and reproduces video / audio data stored on the hard disk. The video data stored in the HDD 14 can be subjected to special reproduction such as slow reproduction, and can be edited by the user.

  The video decoder 15 performs predetermined signal processing such as decoding processing on input video data (for example, video data separated from a television broadcast signal by the receiving unit 12 or video data read from the HDD 14). Further, when playing back video data stored in the HDD 14, the playback speed of the video data can be changed. For example, when predetermined signal processing is performed on video data for 1 second (for example, 30 frames) and this video data is played back in 2 seconds, it becomes a slow playback at 1/2 times speed.

The audio decoder 16 performs various signal processing such as decoding processing and surround processing on input audio data (for example, audio data separated from a television broadcast signal by the receiving unit 12 or audio data read from the HDD 14). Do.
The buffer 17 temporarily stores the video data (reproduced video data) subjected to signal processing in the video decoder 15. When a plurality of playback videos based on one video data is displayed on the slow playback speed selection screen that allows the user to select a playback speed at the time of slow playback, the video decoder 15 plays back at a plurality of different playback speeds. A plurality of video data is stored in the buffer 17.

The video signal output unit 18 converts the video data stored in the buffer 17 into a predetermined signal format and outputs it to a display device such as a TV monitor. In addition, when displaying the slow playback speed selection screen, a composition process for displaying a plurality of video data stored in the buffer 17 on one screen is performed.
The audio signal output unit 19 converts the audio data from the audio decoder 16 into an analog audio signal and outputs it to a speaker or the like.

  The control unit 11 includes a CPU 11A, a RAM 11B, and a ROM 11C. The CPU 11A reads various programs stored in the ROM 11C, develops them in the work area of the RAM 11B, and executes them to control the entire HDD recorder 1 and the operation of each block.

For example, the control unit 11 controls the playback speed when the video data stored in the HDD 14 is played back by the video decoder 15 as playback means.
In particular, in the present embodiment, an appropriate slow playback speed can be easily determined in so-called slow playback in which video data stored in the HDD 14 is played back slower than the original playback speed (for example, 30 frames / second). I am doing so.

  Specifically, based on one video data stored in the HDD 14, a plurality of playback videos played at a plurality of different slow playback speeds are displayed on one screen (slow playback speed selection screen). Then, on the slow playback speed selection screen, based on the input of a predetermined operation signal from the operation unit 13, the one video data is played back at a playback speed corresponding to the selected playback video.

  FIG. 2 is a flowchart illustrating an example of the slow playback process according to the present embodiment. This flowchart is realized by the CPU 11A of the control unit 11 executing a program related to the slow playback process.

  First, in step S101, it is determined whether the video data stored in the HDD 14 is being reproduced at a normal reproduction speed (equal speed). If it is determined that the video data is being played back at the normal playback speed, the process proceeds to step S102. If it is determined that the video data is not being played back, the process ends.

  In step S102, it is determined whether or not an operation of the slow playback button of the operation unit 13 is input during playback of video data at the same speed. If the operation of the slow playback button has been input, the process proceeds to step S103, and if not, the process ends.

  In step S103, a slow playback speed selection screen is displayed. Specifically, when the slow playback button is operated, three different playback speeds (for example, 1/2 speed, 1/3 speed, 1 / speed) that are slower than the normal speed and different from each other based on the video data being played back. The video data reproduced at the 4 × speed is stored in the buffer 17, and the reproduced video based on the three video data is displayed on one screen on the TV monitor.

  The slow playback button is operated not only when the slow playback button is operated during playback of the video data but also when the video content to be played back is selected on the title list screen of the video content stored in the HDD 14. In such a case, a slow playback speed selection screen may be displayed.

FIG. 3 is a display example of a slow playback speed selection screen displayed on the TV monitor when the slow playback button is operated. In FIG. 3, reproduced video slow 1, slow 2 and slow 3 reproduced at 1/2 times speed, 1/3 times speed, and 1/4 times speed are respectively displayed on the sub-screen. In addition, a case is shown in which the sub-screen of the playback video “Slow 2” is focused and selected.
On this slow playback speed selection screen, for example, a playback video that is played back at a different slow playback speed for a predetermined time length (for example, 10 seconds) of the original video data is repeatedly displayed. That is, since the playback video data stored in the buffer 17 is repeatedly displayed, the burden on the video decoder 15 can be reduced as compared with the case where the original video data is played back as it is, and the playback video data on the slow playback speed selection screen is reduced. Display processing becomes efficient.

FIG. 4 is an explanatory diagram showing an example of playback time and playback start timing of playback video slow 1, slow 2 and slow 3 displayed on the slow playback speed selection screen. As shown in FIG. 4, for example, when the original video data for t seconds (that is, playback time at the same speed is t seconds) is played back at 1/2 times speed, 1/3 speed, or 1/4 speed. The playback time of one time is 2 t seconds for slow 1, 3 t seconds for slow 2, and 4 t seconds for slow 4. Also, in FIG. 4, in each of the playback video slow 1, slow 2, and slow 3, when the playback of the original video data for t seconds is completed, the slow playback is immediately repeated from the beginning.
Thus, by repeatedly displaying the original video data for a predetermined length of time, the playback speeds can be compared in almost the same scene, so that an appropriate slow playback speed can be accurately determined.

Next, in step 104 of FIG. 2, it is determined whether or not a playback speed selection operation has been performed on the slow playback speed selection screen. If it is determined that there is a reproduction speed selection operation, the process proceeds to step S104. If it is determined that there is no reproduction speed selection operation, the process proceeds to step S105.
In the slow playback speed selection screen shown in FIG. 3, for example, the user moves the focus between the sub-screens by operating the cursor button or the like of the operation unit 13, and performs the slow-down operation with an extremely simple operation of operating the enter button. The playback speed can be determined.

  In step S105, it is determined whether the slow playback button has been operated and the display of the slow playback speed selection screen has been canceled. In this embodiment, the display of the slow playback speed selection screen is canceled by re-operating the slow playback button. However, when the other buttons of the operation unit 13 are operated, the display of the slow playback speed selection screen is performed. May be canceled.

  If it is determined in step S105 that a cancel operation has been performed, the process proceeds to step S106, the slow playback speed selection screen is deleted, and the video data is played back at a normal playback speed. If it is determined in step S105 that there is no cancel operation, the process proceeds to step S104. That is, it waits until a predetermined operation is performed on the slow playback speed selection screen.

On the other hand, in step S107, the slow playback speed selection screen is deleted, and the video data is played back at a playback speed corresponding to the selected playback video.
For example, as shown in FIG. 3, when the determination button is operated in a state where the slow 2 playback video is selected, the original video data is played back at the playback speed (1/3 speed) corresponding to the playback video. It will be displayed on the monitor. At this time, based on the timing when the enter button is operated, the playback video from that point is displayed on the main screen. Alternatively, the video data may be reproduced from the beginning.

  As described above, according to the slow playback processing of the present embodiment, it is possible to compare the playback images being played back at a plurality of different slow playback speeds on one screen, so that the user can easily set an appropriate slow playback speed. Can be judged. Further, since the video data can be played back at the selected playback speed only by selecting the video played back at the desired slow playback speed on the slow playback speed selection screen, it is excellent in convenience.

  For example, when a user edits video data stored in a storage medium, slow playback is often used to determine the cutout position, and an appropriate slow playback speed at this time can be easily determined and selected. . Therefore, the editing work can be performed efficiently.

(Modification 1)
FIG. 5 is an explanatory view showing another example of the playback time and playback start timing of playback video slow 1, slow 2 and slow 3 displayed on the slow playback speed selection screen.

In the playback method shown in FIG. 4, the scenes displayed in each of the playback video slow 1, slow 2 and slow 3 are almost the same, but as the time elapses.
Therefore, in FIG. 5, the playback start timings of the three playback video slow 1, slow 2 and slow 3 are made the same. Slow 1 and Slow 2 display a still image at the end or start of the playback video from the end of the playback video to the end of the playback video of Slow 3, respectively.

That is, the plurality of playback videos having different playback times, which are played back at different playback speeds (1/2 times speed, 1/3 times speed, 1/4 times speed) of a certain time length t of one video data stored in the HDD 14. The display is repeated at the same playback start timing.
This makes it possible to compare playback images that are played at multiple different slow playback speeds on a single screen and to compare playback speeds for the same scene by making the playback start timing the same. The playback speed can be accurately determined.

(Modification 2)
FIG. 6 is an explanatory diagram showing another example of the playback time and playback start timing of playback video slow 1, slow 2, and slow 3 displayed on the slow playback speed selection screen.

In the playback method shown in FIG. 4, the scenes displayed in each of the playback video slow 1, slow 2 and slow 3 are almost the same, but as the time elapses.
Therefore, in FIG. 6, the playback start timings are made the same so that the playback times of the three playback video slow 1, slow 2, and slow 3 are the same. Specifically, the playback video slow 1 is a video that has been played back for t seconds of the original video data, the playback video slow 2 is a video that has been played back 2/3 t seconds of the original video data, and the playback video slow 3 is This is an image obtained by reproducing 1/2 t second of the original image data. Accordingly, the playback time of each of the playback video slow 1, slow 2, and slow 3 is 2 t seconds.

  That is, different video data stored in the storage medium in the HDD 14 for different time lengths (t seconds, 2/3 t seconds, 1/2 t seconds) are reproduced at different reproduction speeds (1/2 times speed, 1/3 times speed, 1 A plurality of reproduced videos (2 t seconds) reproduced at / 4 times speed are displayed repeatedly. Since each reproduction time is the same, the reproduction start timing when displaying repeatedly is naturally the same.

  This makes it possible to compare playback images that are played at multiple different slow playback speeds on a single screen and to compare playback speeds for the same scene by making the playback start timing the same. The playback speed can be accurately determined. Further, since the playback video slow 1, slow 2, and slow 3 do not become still images as in the first modification, the user can efficiently compare the slow playback speeds.

  As mentioned above, although the invention made by this inventor was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

  For example, the slow playback speed of the playback video displayed on the slow playback speed selection screen is not limited to ½ times speed, ３ times speed, and ¼ times speed, and may be changed as appropriate. The display form of the slow playback speed selection screen is not particularly limited, and the screen of the TV monitor may be divided into a plurality of parts so that the playback video slow 1, slow 2, and slow 3 are displayed in each area.

In addition, it is desirable to provide a plurality of video decoders 15 so that video data of a plurality of slow playback videos can be generated in parallel.
The present invention can be applied not only to the HDD recorder but also to a television receiver, a DVD recorder, and the like provided with a storage medium.

It is the block diagram which showed functionally each component built in the hard disk recorder 1 as one Embodiment of the reproducing | regenerating apparatus based on this invention. It is the flowchart shown about an example of the slow reproduction process which concerns on this embodiment. It is an example of a slow playback speed selection screen displayed on the TV monitor when a slow playback button is operated. It is explanatory drawing shown about the example of the reproduction | regeneration time and reproduction | regeneration start timing of reproduction | regeneration video slow 1, slow 2, and slow 3 displayed on a slow reproduction speed selection screen. It is explanatory drawing shown about the other example of the reproduction time of reproduction | regeneration video slow 1, slow 2, and slow 3 displayed on a slow reproduction speed selection screen, and a reproduction start timing. It is explanatory drawing shown about the other example of the reproduction time of reproduction | regeneration video slow 1, slow 2, and slow 3 displayed on a slow reproduction speed selection screen, and a reproduction start timing.

Explanation of symbols

1 HDD recorder (playback device)
11 Control unit (control means)
12 Receiver 13 Operating Unit 14 HDD (Storage Medium)
15 Video decoder (reproduction means)
16 Audio decoder 17 Buffer 18 Video signal output unit 19 Audio signal output unit

Claims (5)

Playback means for playing back video data stored in a storage medium;
Control means for controlling the playback speed of the video data by the playback means,
The control unit is configured to display a plurality of reproduced videos reproduced at a plurality of different reproduction speeds on a single screen on a display screen, which are slower than the original reproduction speed and based on one image data stored in the storage medium. And displaying the one video data at a playback speed corresponding to a playback video selected from the plurality of playback videos based on a predetermined operation signal input from the operation means. A playback device.   The playback apparatus according to claim 1, wherein the control unit repeatedly displays the plurality of playback videos in a predetermined area within the same screen.   The control means is configured to repeatedly display the plurality of playback videos having different playback times, which are played back at different playback speeds for a certain length of time of one video data stored in the storage medium, at the same playback start timing. The reproducing apparatus according to claim 2, wherein the reproducing apparatus is characterized.   The control means repeatedly displays the plurality of playback videos having the same playback time, in which different lengths of video data stored in the storage medium are played at different playback speeds. 2. The playback device according to 2. Playback means for playing back video data stored in a storage medium;
Control means for controlling the playback speed of the video data by the playback means,
The control means reproduces a predetermined time length of one video data stored in the storage medium at different slow playback speeds, or a plurality of playback videos having different playback times, or one stored in the storage medium A plurality of playback videos having the same playback time, which are played back at different slow playback speeds for different lengths of video data, are repeatedly displayed in a predetermined area on the same screen of the display means, and a predetermined operation signal is received from the operation means. The playback apparatus, wherein the one video data is played back at a playback speed corresponding to a playback video selected from the plurality of playback videos based on the input.

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