JP2008035053A - Video-editing device, video-reproducing device, video-editing method and video-reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce data quantity, and to improve the convenience of a user by making a specific scene remain in the case of edition, and creating continuous data after editing. <P>SOLUTION: This video-editing device is provided with a storage means (memory 27) for storing a conversion table in which significance, relating to a video signal and the rate of the conversion of the video signal into predetermined image quality corresponding to the significance are associated with each other; a significance determination means (17) for determining significance for each chapter of the video signal; a bit-rate conversion means (17) for converting the video signal into a predetermined image quality for each chapter, according to the determined significance by using a conversion table; and a video signal output means (14) for connecting chapters, and for outputting the video signal configured of the chapters whose bit rates are different. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video reproduction device for reproducing a video signal stored in a storage medium. The present invention also relates to a video editing apparatus for editing a video signal stored in a storage medium.

  Currently, video reproduction apparatuses that record video on a recording medium such as an HDD (hard disk drive) or a DVD (digital video disk) have been commercialized. Such a video playback apparatus can easily record (record) video and music (hereinafter collectively referred to as video).

The video signal recorded (recorded) on the recording medium can be edited such as dividing a title (program) to create a playlist or specifying a chapter.
Patent Document 1 discloses a technique related to digest video creation. Then, the technical method (cut, telop, camera work) used in the image data is analyzed to detect the time point (start point) when the technical method starts to be used, and the image of the starting point of the technical method is detected. The image data is divided into a plurality of video sections with the frame as a delimiter, and the information value is determined according to the length of the video section. A technique is disclosed in which a video section having a higher information value is reproduced and displayed at a speed close to a normal reproduction speed, and a digest video is created so that a lower information value is reproduced and displayed at a higher speed. However, although the reproduction speed is changed in Patent Document 1, there is a problem that the data amount related to video and audio does not change.
JP-A-2005-252372

  Accordingly, the present invention has been made in consideration of the above-described circumstances, and an object thereof is to reduce the amount of data in editing a video signal stored in a storage medium. It is another object of the present invention to automatically leave a specific scene at the time of editing or to prevent deletion, to make continuous data after editing, to reduce the amount of data, and to improve user convenience.

  The video editing apparatus according to the present invention is a video editing apparatus that edits a video signal composed of a plurality of chapters, and converts the video signal into a predetermined image quality corresponding to the importance of the video signal and the importance. Storage means storing a conversion table associated with a ratio (bit rate), importance level determination means for receiving the video signal and determining the importance level for each chapter of the video signal, and stored in the storage means A bit rate conversion means for converting a video signal into a predetermined image quality (bit rate) for each chapter according to the determined importance, and a plurality of bit rates converted for each chapter. Consists of video signal output means for connecting video chapters and outputting video signals composed of multiple chapters including chapters with different bit rates To have.

  A video playback device according to the present invention is a video playback device that plays back a video signal composed of a plurality of chapters, a storage medium storing a video signal composed of a plurality of chapters including chapters having different bit rates, and Storage means storing a conversion table in which a bit rate related to the video signal and a reproduction speed are associated with the bit rate, and a conversion received from the video signal stored in the storage medium and stored in the storage means A table is used to provide video signal reproducing means for reproducing a video signal at a reproduction speed associated with the bit rate.

  The video editing method according to the present invention includes a step of receiving a video signal and determining an importance level for each chapter of the video signal, an importance level related to the video signal, and a video signal having a predetermined image quality corresponding to the importance level. Converting each video signal into a predetermined image quality (bit rate) for each chapter according to the determined importance, using a conversion table in which the rate of conversion to (bit rate) is associated, and for each chapter Are connected to a plurality of chapters each having a bit rate converted, and a step of outputting a video signal composed of a plurality of chapters including chapters having different bit rates is provided.

  According to the video playback method of the present invention, a step of receiving a video signal composed of a plurality of chapters including chapters having different bit rates, and a playback speed is associated with the bit rate of the video signal and the bit rate. The conversion table is used to provide a step of reproducing the video signal at a reproduction speed associated with the bit rate.

According to the configuration described above, it is possible to reduce the amount of data in editing the video signal stored in the storage medium. In addition, the present invention automatically prevents a specific scene from being left or deleted during editing, makes continuous data after editing, reduces the amount of data, and improves user convenience.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an example of the configuration of a video editing apparatus / video playback apparatus according to an embodiment of the present invention.
In this video reproducing apparatus, both a DVD-RAM and a hard disk can be handled as a recording medium, but the hard disk or the DVD-RAM may be replaced with a recording medium such as a semiconductor memory. .

Note that this video playback apparatus is configured to record video.
In the video playback apparatus shown in FIG. 1, when each block is roughly divided, the main block of the recording unit exists on the left side, and the main block of the playback unit exists on the right side.
That is, this video reproduction apparatus has two types of disk drive units. First, it has a disk drive unit 12 that rotationally drives an optical disk 11 as a first medium, which is an information recording medium that can construct a video file, and executes reading and writing of information. In addition, an HDD (Hard Disk Drive) unit 13 that drives a hard disk 13a as a second medium is provided.

  A D-PRO (Data-Processor) unit 14 can supply recording data to the disk drive unit 12 and the HDD unit 13 and can receive a reproduced signal. The disk drive unit 12 includes a rotation control system, a laser drive system, an optical system, and the like for the optical disk 11.

The D-PRO unit 14 handles data in recording or reproduction units, and includes a buffer circuit, a modulation / demodulation circuit, an error correction unit, and the like.
In addition, the video reproducing apparatus mainly includes an encoder unit 15 constituting the recording side, a decoder unit 16 constituting the reproducing side, and a microcomputer block 17 for controlling the operation of the apparatus main body.

  The encoder unit 15 includes an analog-to-digital converter for video and audio that digitizes an input analog video signal or analog audio signal, a video encoder, and an audio encoder. Furthermore, a sub-picture encoder is also included.

  The output of the encoder unit 15 is converted into a predetermined DVD-RAM format by a formatter 19 including a buffer memory 18 and is supplied to the previous D-PRO unit 14.

  The encoder unit 15 receives an external analog video signal and an external analog audio signal from an A / V (Audio / Video) input unit 20, or an analog video signal and an analog audio signal from a TV (Television) tuner unit 21. Is done.

  The encoder unit 15 can also supply the compressed digital video signal or digital audio signal directly to the formatter 19 when the compressed digital video signal or digital audio signal is directly input.

  The encoder unit 15 can also directly supply a digital video signal or audio signal that has been subjected to analog-digital conversion to a V (Video) mixing unit 22 or an audio selector 23.

  In the video encoder included in the encoder unit 15, the digital video signal is converted into a digital video signal compressed at a variable bit rate based on MPEG (Moving Picture Experts Group) 2 or MPEG1 standard.

  The digital audio signal is converted into a digital audio signal compressed at a fixed bit rate based on the MPEG or AC (Audio Compression) -3 standard, or a digital audio signal of linear PCM (Pulse Code Modulation).

  When a sub video signal is input from the A / V input unit 20 (for example, a signal from a DVD video player with an independent output terminal of a sub video signal), or a DVD video signal having such a data structure is broadcast, When it is received by the TV tuner unit 21, the sub-picture signal in the DVD video signal is encoded (run-length encoded) by the sub-picture encoder to become a sub-picture bitmap.

  The encoded digital video signal, digital audio signal, and sub-picture data are packed by the formatter 19 to become a video pack, an audio pack, and a sub-picture pack. Further, these packs are collected and converted into a format defined by a DVD-VR (Video Recording) standard (for example, a standard for recording on DVD-RAM, DVD-R, DVD-RW, etc.).

  Here, the video playback apparatus in FIG. 1 sends the information (packets of video, audio, sub-picture data, etc.) formatted by the formatter 19 and the created management information to the HDD unit 13 via the D-PRO unit 14. Alternatively, it can be supplied to the disk drive unit 12 and recorded on the hard disk 13 a or the optical disk 11.

  Information recorded on the hard disk 13a or the optical disk 11 can also be recorded on the optical disk 11 or the hard disk 13a via the D-PRO unit 14 and the disk drive unit 12.

  It is also possible to perform an editing process such as deleting a part of video objects of a plurality of programs recorded on the hard disk 13a or the optical disk 11 or connecting objects of different programs. This is because the data unit handled by the format according to this embodiment is defined to facilitate editing.

  The microcomputer block 17 includes an MPU (Micro Processing Unit) or CPU (Central Processing Unit), a ROM in which a control program and the like are written, and a RAM for providing a work area necessary for executing the program. .

  The MPU of the microcomputer block 17 uses a RAM as a work area according to a control program stored in the ROM, detects a defect location, detects an unrecorded area, sets a recording information recording position, records a UDF (Universal Disk Format), Performs AV address setting and the like.

  The microcomputer block 17 has an information processing unit necessary for controlling the entire system, and includes a work RAM 24, a method difference detection unit 25, a VMG (total video management information) information creation unit, and a copy related information detection. Copy, scrambling information processing unit (RDI processing unit), packet header processing unit, sequence header processing unit, aspect ratio information processing unit, and the like.

  The microcomputer block 17 also includes a data bit rate conversion means 26, which will be described later, and a memory 27 in which a conversion table for associating the importance of video / audio data with bit rate conversion is stored. Here, the bit rate is a rate at which a video signal is converted into a predetermined image quality.

The chapter skip reproduction means 26 stores information on the thumbnail position corresponding to the chapter number calculated in a predetermined chapter. And the control means which acquires the thumbnail position of this calculated chapter number is provided.

  Among the execution results of the microcomputer block 17, contents to be notified to the user are displayed on the display unit 28 of the video reproduction device or displayed on the monitor display 29 as OSD (On Screen Display).

  Further, the microcomputer block 17 has a key input unit 30 for giving an operation signal for operating the video reproduction apparatus. The key input unit 30 corresponds to, for example, operation switches provided on the main body of the video reproduction device or a remote controller. Further, it may be a PC (Personal Computer) personal computer or the like connected to the video reproduction apparatus by means of wired communication, wireless communication, optical communication, infrared communication, or the like.

  In any form, the user operates the key input unit 30 to perform recording processing of the input video / audio signal, playback processing of the recorded content, editing processing on the recorded content, and the like. Can be applied.

  The timing at which the microcomputer block 17 controls the disk drive unit 12, HDD unit 13, D-PRO unit 14, encoder unit 15, decoder unit 16 and the like is based on time data from an STC (System Time Clock) 31. Can be executed. The recording and reproduction operations are normally executed in synchronization with the time clock from the STC 31, but other processes may be executed at a timing independent of the STC 31.

  The decoder unit 16 separates and extracts each pack from a DVD format signal having a pack structure, a memory used when pack separation or other signal processing is performed, and main video data (video pack of the video pack) separated by the separator. V decoder that decodes (content)), SP (Sub Picture) decoder that decodes sub-picture data (sub-picture pack contents) separated by a separator, and audio data (audio pack contents) separated by a separator An A decoder. In addition, a video processor is provided that appropriately synthesizes the decoded sub-video with the decoded main video, and outputs the menu, highlight button, subtitles, and other sub-videos superimposed on the main video.

  The output video signal of the decoder unit 16 is input to the V mixing unit 22. The V mixing unit 22 synthesizes text data. The V mixing unit 22 is also connected to a line that directly takes in signals from the TV tuner unit 21 and the A / V input unit 20.

  Further, a frame memory 32 used as a buffer is connected to the V mixing unit 22. When the output of the V mixing unit 22 is an analog output, it is externally output via an I / F (Interface) 33, and when it is a digital output, an external monitor display 29 is provided via a D / A (Digital / Analog) converter 34. Is output.

The output audio signal of the decoder unit 16 is converted into an analog signal by a D / A converter 35 via a selector 23 and output to an external speaker 36.
The selector 23 is controlled by a select signal from the microcomputer block 17. Thus, the selector 23 can directly select a signal that has passed through the encoder unit 15 when directly monitoring a digital signal from the TV tuner unit 21 or the A / V input unit 20.

  Note that the formatter 19 of the encoder unit 15 creates each segmentation information during recording and periodically sends it to the MPU of the microcomputer block 17 [information at the time of GOP (Group Of Picture) head interrupt, etc.]. The segmentation information includes the number of VOBU (Video Object Unit) packs, the end address of an I (Intra) picture from the beginning of the VOBU, the playback time of the VOBU, and the like.

  At the same time, information from the aspect ratio information processing unit is sent to the MPU at the start of recording, and the MPU creates VOB (Video Object) stream information (STI). Here, the STI stores resolution data, aspect ratio data, and the like, and at the time of reproduction, each decoder unit is initialized based on this information.

  In this video reproduction apparatus, one video file is stored on one disc. Also, in order to continue playback without interruption while accessing (seeking) data, a minimum continuous information unit (size) is determined. This unit is called CDA (Contiguous Data Area). The CDA size is a multiple of an ECC (error correction code) block (16 sectors), and the file system performs recording in units of CDA.

  The D-PRO unit 14 receives data in VOBU units from the formatter 19 of the encoder unit 15 and supplies data in CDA units to the disk drive unit 12 or the HDD unit 13.

  Also, the MPU of the microcomputer block 17 creates management information necessary for reproducing the recorded data, and when recognizing a data recording end command, sends the created management information to the D-PRO unit 14. Thereby, management information is recorded on the optical disk 11 or the hard disk 13a.

  For this reason, when encoding is performed, the MPU of the microcomputer block 17 receives data unit information (eg, segmentation information) from the encoder unit 15. The MPU of the microcomputer block 17 recognizes the management information (file system) read from the optical disk 11 or the hard disk 13a at the start of recording, recognizes the unrecorded area of each disk, and sets the recording area on the data as D- The disc is set via the PRO unit 14.

FIG. 2 is a diagram for explaining digest editing in video / audio data in the video editing apparatus / video playback apparatus according to the embodiment of the present invention.
Here, reference numeral 201 denotes video / audio data output from the storage medium and used for digest editing. In the embodiment of the present invention, the importance is associated with the video / audio data 201 to be digest edited in accordance with the taste and taste of the viewer.

Reference numeral 202 indicates that the reproduction time of the video / audio data 201 is associated with the degree of importance according to the taste of the viewer.
For example, here, the video / audio data is divided by the start time and the end time in units of importance. Furthermore, it is managed on a database associated with bit rates. The importance here is, for example, one created by processing based on a per-minute audience rating of a recorded TV program, or a time and importance arbitrarily set in advance by the viewer according to hobbies and preferences. .

A conversion table for associating the importance of the video / audio data with the bit rate conversion is stored in the memory 27.
Further, the microcomputer block 17 includes data bit rate conversion means 26, and performs bit rate conversion according to the importance of the video / audio data based on the conversion table stored in the memory 27.

Reference numeral 203 indicates video / audio editing data converted by the data bit rate conversion means 26.
FIG. 3 is a diagram for explaining video / audio data management in the video editing apparatus / video playback apparatus according to the embodiment of the present invention. Here, it is expressed as a management table of video / audio data.

That is, here, chapter number 1 has a start time of 00:00:00, an end time of 00:30:00, and an importance level of 1.
FIG. 4 associates the importance level of video / audio data with the conversion table indicating the bit rate conversion of video / audio data and the playback speed during digest playback in the video editing apparatus / video playback apparatus according to the embodiment of the present invention. It is a table.

  Here, for example, with respect to importance 1, the bit rate is 1/5 times and the reproduction speed is 5 times. Also, the bit rate is 2/5 times the importance level 2 and the playback speed is 4 times, the bit rate is 3/5 times the importance level 3 and the playback speed is 3 times, and the bit rate is the importance level 4. Is 4/5 times, the playback speed is 2 times, the bit rate is 1 time and the playback speed is 1 time for the importance 5.

FIG. 5 is a flowchart for explaining digest editing of video / audio data in the video editing apparatus / video playback apparatus according to the embodiment of the present invention.
For example, the user operates the key input unit 30 to select digest editing displayed on a display screen (not shown). Then, the video editing device / video playback device divides the video / audio data so that the video / audio data corresponds to the chapter management table shown in FIG. Then, the video / audio data is converted in accordance with the bit rate shown in the bit rate association table shown in FIG. Then, after this data conversion, the video / audio data is connected again, and the video / audio editing data 203 converted by the data bit rate conversion means 26 is created.

Reference numeral S201 represents a start step here. Subsequently, the process proceeds to a step marked S202.
Reference numeral S202 denotes a step of expanding the video / audio data into an editable format. Subsequently, the process proceeds to a step marked S203.
Reference S203 is a step of dividing the video / audio data into, for example, a plurality of chapters with reference to the database indicating the importance. Subsequently, the process proceeds to the step marked S204.

  Reference S204 is a step of converting the video / audio data divided into a plurality of chapters into a bit rate corresponding to the importance. Then, it progresses to the step which attached | subjected code | symbol S205.

Reference S205 is an end step, and the processing here ends.
That is, in the video editing apparatus according to the embodiment of the present invention, the conversion table in which the degree of importance relating to the video signal and the ratio (bit rate) for converting the video signal into a predetermined image quality are associated with the degree of importance. Is determined using a storage means (memory 27) in which is stored, importance determination means (17) for receiving video signals and determining the importance for each chapter of the video signal, and a conversion table stored in the storage means The bit rate conversion means (17) for converting the video signal into a predetermined image quality (bit rate) for each chapter according to the degree of importance, and a plurality of chapters each converted for the bit rate for each chapter are connected to form a bit. Video signal output means (14) for outputting a video signal composed of a plurality of chapters including chapters having different rates is provided.

FIG. 6 is a flowchart for explaining digest playback of video / audio data in the video editing apparatus / video playback apparatus according to the embodiment of the present invention.
Reference numeral S301 is a starting step here. Subsequently, the process proceeds to a step marked S302.
Reference numeral S302 is a step for determining whether or not to perform digest reproduction. If it is determined that digest reproduction is to be performed, the process proceeds to the step denoted by reference numeral S303 (Yes). If it is determined that digest reproduction is not performed, the process proceeds to the step denoted by reference numeral S304 (No).

  Reference numeral S303 is a step of determining a reproduction speed corresponding to the bit rate with reference to the database indicating the importance. Subsequently, the process proceeds to a step marked S304.

Reference numeral S304 denotes a step of reproducing a video signal. Then, it progresses to the step which attached | subjected code | symbol S305.
Reference numeral S305 denotes an end step, and the process here ends.
In the video reproduction apparatus according to the embodiment of the present invention, a storage medium (12, 13) storing video signals composed of a plurality of chapters including chapters having different bit rates, and a bit rate related to the video signal The storage means (27) storing the conversion table in which the reproduction speed is associated with the bit rate, and the video signal stored in the storage medium (12, 13) are received and stored in the storage means (27). Video signal reproduction means for reproducing the video signal at a reproduction speed associated with the bit rate using the conversion table is provided.

With the configuration as described above, the embodiment of the present invention has an effect that the data amount can be reduced in the editing of the video signal stored in the storage medium (12, 13). In the embodiment of the present invention, when the video editing apparatus performs the above-described operation during editing, it automatically prevents a specific scene from being left or deleted, makes continuous data after editing, and reduces the data amount. Thus, the convenience of the user can be improved.

  Note that the present invention is not limited to the above-described embodiment as it is, and various modifications can be made to the constituent elements without departing from the spirit of the invention at the implementation stage.

1 is a block diagram showing an example of a configuration of a video editing device / video playback device according to an embodiment of the present invention. The figure explaining the digest edit in the video / audio data in the video editing device / video playback device according to the embodiment of the present invention. The figure explaining the management of the video / audio data in the video editing device / video playback device according to the embodiment of the present invention. 4 is a table associating the importance level of video / audio data with a video editing apparatus / video playback apparatus according to an embodiment of the present invention, a conversion table indicating bit rate conversion of video / audio data, and a playback speed during digest playback. 6 is a flowchart for explaining video / audio data digest editing in the video editing apparatus / video reproduction apparatus according to the embodiment of the present invention; The flowchart explaining the digest reproduction of the video / audio data in the video editing apparatus / video playback apparatus according to the embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Optical disk, 12 ... Disk drive part, 13 ... HDD part, 14 ... D-PRO part, 15 ... Encoder part, 16 ... Decoder part, 17 ... Microcomputer block, 18 ... Buffer memory, 19 ... Formatter, 20 ... A / V input unit, 21 ... TV tuner unit, 22 ... V mixing unit, 23 ... selector, 24 ... work RAM, 25 ... method difference detection unit, 26 ... data bit rate conversion means, 27 ... memory storing conversion table , 28 ... display section, 29 ... monitor display, 30 ... key input section, 31 ... STC, 32 ... frame memory section, 33 ... I / F, 34 ... D / A converter, 35 ... D / A converter, 36 … Speaker.

Claims (6)

In a video editing apparatus for editing a video signal composed of a plurality of chapters,
Storage means for storing a conversion table in which an importance level related to the video signal and a ratio (bit rate) for converting the video signal into a predetermined image quality corresponding to the importance level are stored;
Importance determining means for receiving the video signal and determining the importance for each chapter of the video signal;
Bit rate conversion means for converting a video signal into a predetermined image quality (bit rate) for each chapter according to the determined importance, using the conversion table stored in the storage means,
A video editing apparatus comprising video signal output means for connecting a plurality of chapters each having a bit rate converted for each chapter and outputting a video signal composed of a plurality of chapters including chapters having different bit rates. . In a video editing apparatus for editing a video signal composed of a plurality of chapters,
Storage means for storing a conversion table in which a degree of importance relating to the video signal and a ratio of converting the video signal to a predetermined image quality (bit rate) corresponding to the importance are stored;
A storage medium storing a video signal composed of a plurality of chapters;
Importance determining means for receiving the video signal stored in the storage medium and determining the importance for each chapter of the video signal;
Bit rate conversion means for converting a video signal into a predetermined image quality (bit rate) for each chapter according to the determined importance, using the conversion table stored in the storage means,
A video editing apparatus comprising video signal output means for connecting a plurality of chapters each having a bit rate converted for each chapter and outputting a video signal composed of a plurality of chapters including chapters having different bit rates. .   The video editing apparatus according to claim 1, wherein the importance determined for each chapter of the video signal is determined according to a viewer's preference registered in advance. In a video playback device that plays back a video signal composed of a plurality of chapters,
A storage medium storing a video signal composed of a plurality of chapters including chapters having different bit rates;
Storage means storing a conversion table in which a bit rate relating to the video signal and a reproduction speed are associated with the bit rate;
Video signal reproduction means for receiving a video signal stored in the storage medium and reproducing the video signal at a reproduction speed associated with a bit rate using a conversion table stored in the storage means; Video playback device. In a video editing method for editing a video signal composed of a plurality of chapters,
Receiving a video signal and determining the importance for each chapter of the video signal;
Using a conversion table in which the degree of importance relating to the video signal and the ratio of converting the video signal to a predetermined image quality (bit rate) corresponding to the degree of importance are used, and for each chapter according to the determined degree of importance Respectively converting the video signal into a predetermined image quality (bit rate);
A video editing method comprising: connecting a plurality of chapters each having a bit rate converted for each chapter and outputting a video signal composed of a plurality of chapters including chapters having different bit rates. In a video playback method for playing back a video signal composed of a plurality of chapters,
Receiving a video signal composed of a plurality of chapters including chapters having different bit rates;
A video playback method comprising the step of playing back a video signal at a playback speed associated with the bit rate using a bit rate relating to the video signal and a conversion table in which the playback speed is associated with the bit rate. .

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