JP2006180407A - Recording/playback device and image editing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording/playback device and image editing method therefor in which the operability of image editing is improved by editing moving image data in an external editor without moving or copying the moving image data from a medium whereon the moving image data are recorded. <P>SOLUTION: The recording/playback device 101 comprises: a still image stream generating function 205 to which an external editor 102 is connected for editing a digitally recorded moving image, for creating a still image stream constituted of a plurality of still images and time information of the still images from a moving image based on a transmission request of the still image stream from the external editor 102; and an external editing control function 202 for receiving an editing instruction of the moving image based on the still image stream from the external editor 102 and controlling execution processing of the editing instruction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording / playback apparatus capable of digitally recording a moving image, and more particularly to a recording / playback apparatus and an image editing method for the recording / playback apparatus that allow editing from an external editing device without moving or copying moving image data. It is.

  Conventionally, in order to edit a digitally recorded moving image, editing is performed using a recording / playback apparatus that records moving image data.

  In recent years, small terminals such as personal computers have been widely used for editing digitally recorded moving images due to an increase in processing speed and resolution of a display screen. In order to perform editing using a computer as an external editing device, first, editing is started after moving or copying all moving image data from the recording / playback device to the external editing device. Some use a low-resolution moving image in consideration of the data movement time (see, for example, Patent Document 1).

  There is also an index file that is created and edited to prevent an increase in edit data (see Patent Document 2).

  On the other hand, with the start of digital broadcasting, a recording / playback apparatus capable of receiving and recording digital broadcasting has enabled digital recording without video degradation. Since a digitally recorded moving image can be duplicated without video deterioration, the recording / playback apparatus has a management function by copy control for the purpose of copyright protection.

  The video broadcast with the copy-once attribute can be recorded only once by the recording / playback apparatus, and the recorded video is managed as data of a copy prohibition (No More Copy) attribute. When the copy-controlled video is moved from the recording / playback apparatus, CPRM (Content Protection for Recordable Media), DTCP (Digital Transmission Content Protection), DTCP-IP (DTCP over Internet Protocol) GC ) Is protected. For this reason, restrictions are imposed on the destination device or medium during data movement.

In addition, when digital broadcasting is converted and recorded at a low resolution, restrictions are imposed by copy control.
JP 2004-72476 A JP-A-11-260039

  When a moving image in the recording / playback apparatus is edited by an external device, it is necessary to move all target moving image data before starting the editing operation, and it takes time to move the data. In addition, when using a low-resolution moving image, it is necessary to record a low-resolution second moving image in advance, and it is also necessary to move the moving image data.

  When the editing operation is performed in the recording / reproducing apparatus, the editing confirmation is performed while using the television connected to the recording / reproducing apparatus, so that the television is occupied. Further, it is necessary to perform an editing operation using an input device unique to the recording / playback device, and there is a problem that the input device cannot be selected depending on the operation content.

  For a moving image managed by copy control, there are restrictions on the number of times of copying when copying a moving image, device authentication of the destination device when moving a moving image, and copying control that deletes moving image data of the moving source. is there.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recording / playback apparatus and a video editing method for the same that can edit moving image data with an external editing device without moving or copying from the recorded medium and improving the operability of video editing. There is to do.

  The recording / playback apparatus according to the present invention is a recording / playback apparatus for digitally recording a moving image and playing back the digitally recorded moving image, and is connected to an external editing device for editing the digitally recorded moving image. Based on a still image sequence transmission request from the device, a still image sequence including a plurality of still images and time information of each still image is created from a moving image, and the created still image sequence is transmitted to an external editing device. The image processing apparatus includes an image sequence generation unit and an external editing control unit that receives a moving image editing command using a still image sequence from an external editing device and controls execution processing of the editing command.

  The video editing method of the present invention is a video editing method of a recording / playback apparatus that performs digital recording of a moving image and playback of the digitally recorded moving image, and an external editing device that edits the digitally recorded moving image. A still image sequence composed of a plurality of still images and time information of each still image based on a still image sequence transmission request from the video, and transmits the created still image sequence to an external editing device. A moving image editing command based on a still image sequence is received from the editing device, and execution processing of the editing command is controlled.

  According to the present invention, since the moving image data is not moved and a still image having a smaller data amount than the moving image data is transmitted to the external editing device, the editing operation can be performed while confirming the still image with the external editing device. it can.

  Further, according to the present invention, since an editing operation can be performed using an external editing device without requiring a display device connected to the recording / playback device, an input device and environment suitable for the editing operation can be selected.

  Further, according to the present invention, since moving image data to be edited is not moved and duplicated, moving images managed under copy control can also be edited.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

<Outline of video editing by external editing device of recording / playback device>
With reference to FIG. 1, an outline of video editing by an external editing device of a recording / playback device according to an embodiment of the present invention will be described. FIG. 1 is an explanatory diagram for explaining an outline of video editing by an external editing device of a recording / playback device according to an embodiment of the present invention.

  In FIG. 1, moving image data is recorded in the recording / playback apparatus 101, and an editor uses an external editing apparatus 102 to perform moving image editing work.

  The recording / playback apparatus 101 and the external editing apparatus 102 are connected via a communication line 103, and the editor performs an editing operation while confirming a still image displayed on the external editing apparatus 102.

  Video data transmitted from the recording / playback apparatus 101 is content-protected 104 by, for example, DTCP.

  The communication line 103 includes, for example, IEEE 1394, Ethernet (registered trademark), USB, Bluetooth, and a telephone line network, and mediates communication between the recording / playback apparatus 101 and the external editing apparatus 102.

  The still image is, for example, an I picture included in an image format of JPEG, BMP, GIF, PNG, TIFF format or an MPEG moving image.

<Functions of recording / playback device and external editing device>
Next, referring to FIG. 2, functions of the recording / playback apparatus and the external editing apparatus for editing video on the recording / playback apparatus according to an embodiment of the present invention will be described. FIG. 2 is an explanatory diagram for explaining the functions of the recording / playback apparatus and the external editing apparatus that performs video editing on the recording / playback apparatus according to the embodiment of the present invention.

  In FIG. 2, the recording / playback apparatus 101 includes an editing processing function 203 that is editing processing means, a moving image codec 204, a still image encoder 206, a still image sequence generation function 205 that is still image sequence generation means, a streaming function 207, and external editing control. An external editing control function 202 as a means; a copy control management 218 as a copy control management means; and a still image protection function 219 as a still image protection means. The recording / playback apparatus 101 is in a state where the moving image data 201 to be edited can be played back.

  The editing processing function 203 reads the target moving image data 201, processes the data, and creates and saves new moving image data and creates a playlist.

  The moving image codec 204 is an algorithm for compressing and expanding the moving image data 201, and assists the reproduction and production of moving image data.

  The still image encoder 206 is an algorithm for compressing still image data and assists the creation of a still image.

  The still image sequence generation function 205 reads the moving image data 201, creates a still image from the moving image data 201 at regular time intervals, and creates a still image sequence 216 composed of the still image and time information.

  The streaming function 207 reads out the moving image data 201 and transmits the moving image data subjected to copy control and encryption processing and content-protected to the external editing apparatus 102 as a streaming video 215.

  The external editing control function 202 receives an editing command 213 or a still image request 214 and a streaming request 217 from the external editing device 102, and controls execution processing of each function of the recording / playback device 101.

  The copy control management 218 controls content protection information of the moving image data 201 and manages data protection.

  The still image protection function 219 performs content protection processing on a still image when creating a still image sequence.

  The external editing apparatus 102 that performs video editing on the recording / playback apparatus 101 includes a video request function 208, an editing command generation function 209, a still image sequence display function 210, a still image decoder 211, and a streaming playback function 212.

  The video request function 208 requests the recording / playback apparatus 101 to transmit a still image sequence 216 or a streaming video 215.

  The editing command generation function 209 analyzes the editing operation input by the editor and generates an editing command 213 to be transmitted to the recording / playback apparatus 101.

  The still image sequence display function 210 displays a still image and time information as thumbnails from the still image sequence 216 transmitted from the recording / playback apparatus 101.

  The still image decoder 211 is an algorithm for decompressing compressed still image data, and assists the still image sequence display function 210 for displaying still images.

  The streaming playback function 212 plays back and displays the streaming video 215 transmitted from the recording / playback apparatus 101. Content protection is also performed so that video data cannot be stored on a recording medium.

  Also, an editing command 213, a still image request 214, or a streaming request 217 is transmitted from the external editing device 102 to the recording / playback device 101.

  The editing command 213 includes a designation of a moving image to be edited, an editing type, an editing command, and time information on an editing position.

  The still image request 214 includes a request data format, designation of a target moving image, the number of still images, and editing position time information.

  The streaming request 217 includes a request data format and designation of a target moving image.

<Example of editing screen of external storage device>
Next, an example of an editing screen of an external editing apparatus that performs video editing on the recording / playback apparatus according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4 are display examples for explaining an example of an editing screen of an external editing device that performs video editing on the recording / playback device according to an embodiment of the present invention. FIG. 3 shows the entire video to be edited. 4 shows an example in which still images are displayed at equal intervals, and FIG. 4 shows an example in which a part designated in FIG. 3 is displayed at still intervals.

  In FIG. 3, the editing screen of the external editing apparatus includes thumbnails 701 to 710 displaying still images and time positions, and an editing bar 721 displayed by adding editing information to the time bar of moving images. Reference numeral 710 is displayed in chronological order.

  Further, as editing information of the editing bar 721, for example, in the example shown in FIG. 3, a portion indicated by diagonal lines is information designated as a portion to be skipped by video editing.

  In addition, above the editing bar 721, triangular marks 711 to 720 indicating the time positions of the thumbnails 701 to 710 currently displayed are displayed.

  In FIG. 3, in order for an editor to display and edit an image at a time between thumbnail 701 and thumbnail 702, thumbnail 701 and thumbnail 702 are selected and display update operation is performed. This change operation can be performed by, for example, a change button (not shown) displayed on the screen, a change button (not shown) provided on the keyboard of the external editing apparatus 102, or the like. Yes.

  The external editing apparatus 102 transmits a still image request 214 including time information of the editing position to the recording / reproducing apparatus 101, newly receives a still image sequence 216 from the recording / reproducing apparatus 101, and updates and displays thumbnails 701 to 710. .

  As shown in FIG. 4, the updated and edited editing screen displays thumbnails 801 to 810 displaying the updated still image and time position between the time position of thumbnail 701 and the time position of thumbnail 702 shown in FIG. 3. With a time position of.

  Further, above the editing bar 721, a triangle mark 811 indicating the time position of the updated thumbnails 801 to 810 is displayed. The editor performs editing work while checking the updated thumbnails 801 to 810.

<Operation of recording / playback apparatus and external editing apparatus>
Next, the operation of the recording / playback apparatus and the external editing apparatus that performs video editing on the recording / playback apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 5 and FIG. 6 are explanatory diagrams for explaining the operation of the recording / playback apparatus and the external editing apparatus that performs video editing on the recording / playback apparatus according to an embodiment of the present invention. FIG. 6 shows an example in which a still video sequence is acquired from a recording / playback apparatus, and FIG. 6 shows an example in which the recording / playback apparatus acquires an editing command from an external editing apparatus and executes editing processing.

  FIG. 7 is a flowchart showing processing of the still image sequence generation function of the recording / playback apparatus according to the embodiment of the present invention, and FIG. 8 shows processing of the editing processing function of the recording / playback apparatus according to the embodiment of the present invention. It is a flowchart.

  First, as an operation in which the external editing apparatus 102 acquires a still video sequence from the recording / playback apparatus 101, as shown in FIG. 5, when an editor using the external editing apparatus 102 starts an editing operation, external editing is performed. The apparatus 102 transmits a still image request 214 to the recording / playback apparatus 101 by the video request function 208 (step S10).

  Next, when receiving the still image request 214 by the external editing control function 202, the recording / playback apparatus 101 calls and executes the still image sequence generation function 205 (step S11), and the still image sequence generation function 205 is the target moving image. The data portion corresponding to the editing position time and the copy control information are read from the data 201 (steps S12 and S13).

  Next, a specified number of still images are generated from the moving image data read using the still image encoder 206 and the still image protection function 219 (step S14).

  Then, a still image sequence 216 composed of the still image generated in step S14 and time information of each still image is generated and transmitted to the external editing apparatus 102 (step S15).

  Next, the external editing apparatus 102 uses the still image sequence display function 210 to display the received still image sequence 216 as a thumbnail list of still images and time on an editing screen as shown in FIG. 3, for example.

  If the external editing apparatus 102 is compatible with DTCP, the still image protection function 219 encrypts the still image in the still image sequence 216 to be created. Is set arbitrarily.

  When the external editing apparatus 102 does not support DTCP, for example, if the moving image data 201 is recorded at a video size: 720 × 480 and a frame rate: 30 fps and is a copy-controlled video, If 30 still images for each frame are transmitted for one second, the original video can be reproduced from the still images. In order to prevent this, processing is performed to limit the size to 144 × 96 for up to one still image per second of video, and content protection (makes copying meaningless) is performed.

  The recording / playback apparatus 101 acquires an editing command from the external editing apparatus 102 and executes the editing process. As shown in FIG. 6, first, an editor using the external editing apparatus 102 performs editing. When the execution operation is performed, the external editing device 102 transmits the editing command 213 generated by the editing command generation function 209 to the recording / playback device 101 (step S20).

  Next, when receiving the editing command 213, the recording / playback apparatus 101 calls the editing processing function 203 by the external editing control function 202 (step S21).

  Next, the edit processing function 203 sequentially executes edit work based on the edit command 213, creates the edited moving image data 51 or the edit play list 52, and ends the edit processing (step S22, step S23).

  Further, as processing of the still image sequence generation function 205 in FIG. 5, as shown in FIG. 7, first, in step S40, the still image sequence generation function 205 is read and the processing is started.

  Next, in step S41, it is determined whether or not there is time information on the editing position in the transmission request. If there is no time information in step S41, it is determined that the request is the first still image sequence request for the target moving image, and the process proceeds to step S42. In step S41, when there is time information, the process proceeds to step S43.

  In step S42, the target moving image is read out, and the start time and the end of the video are set as time information of the editing position, and the process proceeds to step S43.

  Next, in step S43, it is determined whether the moving image to be edited is a video that is copy-controlled. In step S43, if the video is copy-controlled, the process proceeds to step S44. In step S43, if the video is not subject to copy control, the process proceeds to step S45.

  In step S44, if the video is copy-controlled, the number of still images and the size of the image are changed, and the process proceeds to step S45.

  Next, in step S45, the time position of each still image is calculated from the time information of the editing position and the number of still images.

  Next, in step S46, the target moving image is read, and a still image is generated from the frame image corresponding to the time position calculated in step S43.

  Next, in step S47, still image protection processing is performed on the still image generated based on the copy control information. This still image protection process is performed, for example, by inserting a digital watermark into the still image.

  Next, in step S48, the generated still images and the time position information of each still image calculated in step S43 are collected for the number of still images, and a still image sequence is generated.

  Next, in step S49, the still image sequence is transmitted to the external editing apparatus, and the process is terminated.

  Further, as the processing of the editing processing function 203 in FIG. 6, as shown in FIG. 8, first, in step S60, the editing processing function is read and the processing is started.

  In step S61, it is determined whether the edit command 213 shown in FIG. 6 can be executed. If there is an instruction that cannot be executed in step S61, an editing function that is not installed in the recording / playback apparatus 101 is included in the editing instruction, and the process proceeds to step S62. In step S61, if possible, the process proceeds to step S63.

  In step S62, an error process is performed and the editing process is terminated.

  Next, in step S63, the editing type is determined. In step S63, if the edit type is playlist creation, the process proceeds to step S64.

  In step S64, a playlist is created from the editing command. The actual moving image data is not edited.

  Next, in step S67, the editing process ends.

  If it is determined in step S63 that the editing type is not playlist creation but editing for which moving image data needs to be newly created, the process proceeds to step S65.

  In step S65, it is determined whether the moving image to be edited is prohibited from being copied by the copy control. In step S65, if duplication is prohibited, the process proceeds to step S62 to perform error processing and finish editing.

  If duplication is possible in step S65, the process proceeds to step S66.

  In step S66, the moving image to be edited is read, and editing processing of the editing command is sequentially executed to create new moving image data that has been edited.

  Next, in step S67, the editing process is terminated.

  When the editor wants to confirm the edited result as a moving image video, the streaming request 217 is transmitted from the external editing device 102 and the streaming video 215 is received from the recording / playback device 101 in FIG. Play this back and check the editing results.

  As described above, in this embodiment, moving image data is not transferred from the recording / playback apparatus 101 to the external editing apparatus 102, and a still image having a smaller data amount than the moving image data is transmitted to the external editing apparatus 102. Since the editing is performed, the editing operation can be performed while confirming the still image on the external editing apparatus 102.

  In addition, since an editing operation can be performed using the external editing device 102 without requiring a display device connected to the recording / playback device 101, an input device and environment suitable for the editing operation can be selected.

  Further, since moving image data to be edited is not moved or duplicated, moving images managed under copy control can also be edited.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

It is explanatory drawing for demonstrating the outline | summary of the video editing by the external editing apparatus of the recording / reproducing apparatus which concerns on one embodiment of this invention. It is explanatory drawing for demonstrating the function of the external editing apparatus which performs the video editing on the recording / reproducing apparatus which concerns on one embodiment of this invention, and a recording / reproducing apparatus. It is an example of a display for demonstrating the example of an edit screen of the external editing apparatus which performs the video editing on the video recording / reproducing apparatus concerning one embodiment of this invention. It is an example of a display for demonstrating the example of an edit screen of the external editing apparatus which performs the video editing on the video recording / reproducing apparatus concerning one embodiment of this invention. It is explanatory drawing for demonstrating operation | movement of the external editing apparatus which performs the video editing on the recording / reproducing apparatus which concerns on one embodiment of this invention, and a recording / reproducing apparatus. It is explanatory drawing for demonstrating operation | movement of the external editing apparatus which performs the video editing on the recording / reproducing apparatus which concerns on one embodiment of this invention, and a recording / reproducing apparatus. It is a flowchart which shows the process of the still image sequence production | generation function of the recording / reproducing apparatus which concerns on one embodiment of this invention. It is a flowchart which shows the process of the edit process function of the video recording / reproducing apparatus which concerns on one embodiment of this invention.

Explanation of symbols

  51 ... Edited moving image data, 52 ... Editing playlist, 101 ... Recording / playback device, 102 ... External editing device, 103 ... Communication line, 104 ... Content protection, 201 ... Moving image data, 202 ... External editing control function, 203 ... Editing processing function, 204 ... Video codec, 205 ... Still image sequence generation function, 206 ... Still image encoder, 207 ... Streaming function, 208 ... Video request function, 209 ... Edit command generation function, 210 ... Still image sequence display function, 211: Still image decoder, 212: Streaming playback function, 213 ... Editing command, 214 ... Still image request, 215 ... Streaming video, 216 ... Still image sequence, 217 ... Streaming request, 218 ... Copy control management, 219 ... Still image protection Function, 701-710 ... Thumbnail, 711-720 ... Three Mark, 721 ... editing bar, 801-810 ... thumbnail, 811 ... triangle.

Claims (5)

A recording / playback apparatus for digitally recording a moving image and playing back the digitally recorded moving image,
An external editing device for editing the digitally recorded moving image is connected;
Based on a still image sequence transmission request from the external editing device, a still image sequence including a plurality of still images and time information of each still image is created from the moving image, and the created still image sequence is Still image sequence generation means for transmitting to an external editing device;
A recording / playback apparatus comprising: an external editing control unit that receives a moving image editing command by the still image sequence from the external editing device and controls execution processing of the editing command. The recording / reproducing apparatus according to claim 1,
The still image sequence generation means receives a transmission request for a still image sequence including time information of an editing position from the external editing device, and generates the still image sequence based on the time information of the editing position. A recording / reproducing apparatus characterized in that the range of the recording is changed. The recording / reproducing apparatus according to claim 1 or 2,
Copy control management means for performing copy control management for the moving image;
A recording / reproducing apparatus comprising: still image protection means for performing image protection processing on a still image included in the still image sequence to be created from copy control information of the moving image. The recording / reproducing apparatus according to claim 1, 2, or 3,
An editing process for executing the editing command received from the external editing device, creating a playlist from the editing command, reproducing a moving image according to the created playlist, or creating an edited moving image A recording / reproducing apparatus comprising: means. A video editing method of a recording / playback apparatus for performing digital recording of a moving image and playback of the digitally recorded moving image,
Based on a still image sequence transmission request from an external editing device that edits the digitally recorded moving image, a still image sequence including a plurality of still images and time information of each still image is generated from the moving image. And transmitting the produced still image sequence to the external editing device, receiving a moving image editing command by the still image sequence from the external editing device, and controlling execution processing of the editing command. A video editing method for the recording / playback apparatus.

Images