DE10051637A1 - Moving image recording and/or reproduction device, records position of a representative image detected when it gives change of scene between coded movement of image data streams - Google Patents

Abstract

Recording and/or reproduction devices used for movement images with the use of key (code) images, generally require manual marking of each required scene as the user observers the movement image content, and since the marking is carried out manually it proves difficult to precisely mark the key (code) images which represent the total scenario of moving images occurring in real-time. The recording device is used to record a position of a representative image which is detected when it gives a change of scene between coded movement image data streams and for recording the movement image data streams on the recording medium. The recording device comprises a key (code) image detection- and marking-unit for detecting the position of a key (code) image that corresponds to the representative image from the movement image data streams and for marking of its position.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a recording and / or re-recording device give a moving picture or a moving picture using a Key image and a method therefor, and relates in particular to a device and Method of recording and / or reproducing a moving image for use Keyframes with which the entire scenario of moving images is included can be detected during trick play mode.

Description of the prior art

In existing moving image recording methods, data streams are moved from Images recorded on the recording medium without change, and in best Moving image reproduction methods are recorded in this way Moving image data streams at normal speed or at high speed reproduced according to a given playback speed factor. During a normal speed playback mode, the reproduction with running at normal speed. During high speed playback The mode is reproduced with two, four or six times the running at normal speed.

Conventional motion picture reproduction methods are with a fixed Ge speed executed from predetermined playback speed factors is selected. The same problem is faced even at high speeds mode, such as trick play mode. In a different way presses, in trick play mode, playback is performed at one speed leads from twice, four times or six times the normal speed is selected. So it’s difficult to just see the keyframe that comes from the  Corresponding representative images desired by the user, based on a con to reproduce conventional moving image reproduction method. Hence it is very difficult for a user to make moving pictures with high speed a desired scene can be played back, for example in a trick play mode (e.g. the title of a film) and record it exactly.

In order to solve the problem described above, a method has been proposed in that while viewing motion picture content a user directly every ge desired scene to be played back is marked, the marked scenes as Keyframes can be used during playback. According to this procedure however, the user must manually mark each desired scene while viewing the Moving image content observed. Since the marking is done manually, it is not simple, just the keyframes that the overall scenario of occurring in real time represent moving images, to mark them exactly.

OVERVIEW OF THE INVENTION

To solve the above problems, it is an object of the present invention to provide a Motion picture display device for automatically recording positions of representative scenes with which the overall scenario can be estimated to provide incoming moving image data streams.

It is another object of the present invention to provide motion picture reproduction Provide direction to automatically find the position of a representative Image recorded by the motion picture recording device and the reproduce it.

It is still another object of the present invention to record a moving image naming and / or playback method for automatically recording the position egg nes representative image with which the overall scenario from the incoming moving image data streams can be estimated, and to reproduce only the above to provide a representative picture.  

Accordingly, in order to accomplish the first object, a moving picture recording device provided with a recording medium, a recording device for Record a position of a representative image that is captured if there is a Scene change under coded moving picture data streams there, and for recording the moving image data streams on the recording medium.

The recording device preferably comprises a key image acquisition and Marking unit for detecting the position of a key frame according to the representative image among the moving image data streams and for marking them Position, and a recording process for recording the moving image data current with the position of the representative image marked on the recording medium.

To achieve the second object, a moving picture display device is provided provides with a recording medium with coded moving picture data streams and one position of a representative image recorded thereon, which is used in a scene change is detected, and a playback device for searching the on the on drawing medium recorded position of the representative image and how give a representative picture.

The rendering device includes a key frame position searching unit for searching the position of the keyframe that corresponds to the representative frame, under the motion picture data streams recorded on the recording medium, and a how dergabrozessor for reading only the moving image data stream, the key sel picture corresponds while all the unmarked pictures are based between key frames rend on the key frame positions determined by the key frame position unit skipped, and to restore the uncoded original image data the read data stream.

In order to solve the third task, a moving picture recording method is provided steps (a) if coded moving picture data streams are supplied, Detect if there is a scene change based on the coding standards, (b) if a scene change is detected in step (a), detecting the position of a picture the one that occurs for the first time after the scene change is detected as one  Representative image position, (c) marking the representative image acquired in step (b) position, and (d) recording the encoded moving image data stream with the mar representative position.

According to another aspect of the present invention, a Be motion picture display method provided for displaying a moving picture from a recording medium on which moving image data streams with a mar therein Kiert representative image position are recorded, the method the steps includes: (a) if a trick play mode is set, searching for the representative image position recorded on the recording medium, (b) during the Controlling the playback position of the recording medium based on the Position data of the representative image found in step (a), reading the on the Recording medium recorded moving image data stream, and (c) recover the moving image data stream read in step (b).

BRIEF DESCRIPTION OF THE DRAWINGS

The above objects and advantages of the present invention will become apparent from the detail described description of a preferred embodiment with reference to the attached Drawings more clearly. Show it:

Fig. 1 in accordance with is a functional block diagram selbildes an apparatus for recording and / or reproducing moving images using of a key of the present invention;

Fig. 2 is a flowchart illustrating a moving picture recording method using a key picture according to the present invention; and

Fig. 3 is a flow flowchart application under a Bewegbildwiedergabeverfahren Ver represents a key image according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention will now be described in detail with reference to the accompanying drawings gene described.

According to Fig. 1 is a Bewegtbildaufzeichnungs- and / or reproducing apparatus according to the present invention comprises a Schlüsselbilderfassungs- and Markierungsein unit 10, a recording processor 12, a recording medium 14, a Keyring selbildpositionssucheinheit 16, and a reproducing processor 18. The key image detection and marking unit 10 and the recording processor 12 correspond to a moving image recording device. The key position search unit 16 and the reproduction processor 18 correspond to a moving picture reproduction device.

The key frame detection and marking unit 10 detects whether there is a scene change or not when encoded moving picture data streams are input based on the coding standards of the input moving image data streams, and detects the position of a key frame corresponding to a representative picture when there is a scene change . The key image capture and marking unit 10 then marks the position of the captured key image. The coded moving picture data streams are received by a predetermined television channel or supplied by an external system.

For example, if the input moving image data streams are encoded based on MPEG coding standards, the key image detection and marking unit 10 recognizes that there is a scene change if the periodic pattern of intra-image areas or sub-image areas of the input moving image data streams is outside the normal periodic pattern of the Intra-image area that is compatible with the MPEG coding standards. After it is determined that there is a scene change, the intra-image area that occurs for the first time is captured as a key image corresponding to a representative image. Furthermore, the position of the captured intra-image area is marked in order to indicate that the captured intra-image area is a key image.

The recording processor 12 records the moving image data stream with the representative image position marked therein and the position of a scene representing a scene change on the recording medium 14 . The position data of the key frame can be recorded in a separate area of the recording medium 14 , or this can be recorded together with the moving image data streams.

The moving picture reproducing device including the key picture position searching unit 16 and the reproduction processor 18 searches for the position data of a representative picture recorded on the recording medium 14 and reproduces only the representative picture. In other words, the key image position search unit 16 searches for the position data of a key image recorded in a separate area of the recording medium 14 or with the moving image data stream.

In the event that the current playback mode is a trick play mode (or a fast forward mode) for estimating the whole scenario, the playback processor reads out only the moving picture data stream corresponding to the key picture based on the key picture position search unit 16 obtained while the play position of the key picture Recording medium 14 is skipped, and this converts the read data stream back into the uncoded original image data, which are then displayed on a screen.

Therefore, in a moving picture recording and / or reproducing device according to the present invention a user in a pleasant way the overall scenario the moving image content played back at high speed and it can switch the high-speed playback mode to normal Switch playback mode when a scene desired by the user appears. As the detailed moving pictures of the desired scene noted user satisfaction with the playback mode be improved.

Fig. 2 is a flow flowchart of a method for recording moving pictures using a key image according to the present invention.

As shown in FIG. 1, when the encoded moving picture data streams are supplied, it is determined in step 21 whether there is a scene change. In step 22 , the intra-image area that has occurred for the first time after the detection of a scene change is detected as the position of the key image that corresponds to a representative image. In step 23 , the captured key frame position is marked to indicate that this is the position of the representative frame. In step 24 , the moving image data stream with the position of the key frame corresponding to the representative image marked therein is recorded on the recording medium 14 .

Fig. 3 is a timing flow chart of a moving picture recording method Ver use of a key frame according to the present invention.

When a trick play mode for estimating the overall moving picture holding scenario is set, in step 31, the location of a key picture corresponding to a representative picture is searched in the recording medium 14 . In step 32 , the marked moving picture data streams are read out, while all unmarked pictures between key pictures are skipped on the basis of the key picture position data determined in step 31 . In step 33 , the read moving image data streams are converted back into the uncoded original image data.

As previously described, according to the present invention, when encoded Moving image data streams are recorded, a key frame that changes a scene is automatically recorded and its position is recorded. While egg Trick play mode is searched for the recorded key frame position and only the moving picture data stream corresponding to the key picture is marked with ho reproduced speed, thereby the overall scenario of moving picture hold can be easily determined without user intervention.

Since it is also possible to estimate the overall scenario, a user can use the Switch the playback mode to a normal playback mode if one of the User desired scene occurs when viewing the overall scenario, which accessing the content desired by the user between moving images streams is simplified.  

From the foregoing, it will be apparent to those skilled in the art that although certain forms of the invention have been illustrated and described, i verse modifications can be carried out without the basic idea of Deviate scope of the invention. It is therefore intended that the Erfin is limited only by the appended claims.

Claims (9)

1. Device for recording moving images with:
a recording medium; and
recording means for recording a position of a representative image which is detected when there is a scene change between encoded moving picture data streams and for recording the moving picture data streams on the recording medium. 2. The moving image recording apparatus according to claim 1, wherein the recording means comprises:
a key frame detection and marking unit for detecting the position of a key frame corresponding to the representative image from the moving image data streams and for marking its position; and
a recording processor for recording the moving image data stream with the position of the representative image marked therein on the recording medium. 3. The moving image recording apparatus according to claim 2, wherein the Key frame capture and marking unit is configured to a Sze based change and a position of a representative image the coding standards of the coded moving picture data streams. 4. The moving picture recording apparatus according to claim 3, wherein when the input moving picture data streams based on MPEG coding standards are coded, the key image acquisition and marking unit be true that there is a scene change when the periodic pattern of Intra-image areas of fed-in moving image data streams outside of the Periodic patterns compatible with the MPEG coding standards for intra-  Image areas, and then captures the intra-image area that is the first Occurs as a keyframe corresponding to a representative image. 5. Device for displaying moving images with:
a recording medium having encoded moving image data streams and a representative image position recorded thereon which is detected when there is a scene change; and
a reproducing device for searching for the representative image position recorded on the recording medium and for reproducing a representative image. 6. The moving picture reproducing apparatus according to claim 5, wherein the reproducing device comprises:
a key image position search unit for searching for the position of the key image corresponding to the representative image among the moving image data streams recorded on the recording medium; and
a reproduction processor for reading out only the moving picture data stream corresponding to the key picture, while all unmarked pictures between key pictures are skipped based on the key picture position data determined by the key picture position search unit, and for restoring the uncoded original picture data from the read data stream. 7. Method for recording moving pictures with the steps:

• a) when coded moving picture data streams are supplied, detecting whether there is a scene change based on the coding standards;
• b) if a scene change is detected in step (a), detecting the position of an image that occurs for the first time after the scene change is detected as a representative image position;
• c) marking the representative image position acquired in step (b); and
• d) recording the coded moving picture data stream with the representative picture position marked therein.

8. The method for recording moving images according to claim 7, wherein in step (b) the position of an intra-image area, which for the first time after the Detection of the scene change occurred when the representative image position is recorded. 9. A moving picture reproducing method for reproducing a moving picture from a recording medium on which encoded moving picture data streams having a representative picture position marked therein are recorded, the method comprising the steps of:

• a) if a trick play mode is set, searching for the representative image position recorded on the recording medium;
• b) while controlling the reproduction position of the recording medium on the basis of the position data for the representative image determined in step (a), reading the moving image data stream recorded on the recording medium; and
• c) restoring the moving image data stream read in step (b).