JP2011091478A - Recording apparatus and reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that an entire video cannot be reproduced, in a case where a high resolution video signal is divided and recorded and a part of divided video signals is missing. <P>SOLUTION: A recording apparatus includes: an input part which inputs a video signal; a resolution conversion part 2 which converts resolution with respect to a one frame of the video signal from the input part to output a converted video; a division part 1 which spatially divides the one frame of the video signal from the input part to output a plurality of divided videos and division position identification information showing positions of the divided videos in the video signal before being divided; a video identification information giving part 3 which gives the same video identification information to the converted video and the divided videos, with respect to the one frame of the video signal from the input part; a recording part which records information into a plurality of recording media; and a recording control part 4 which performs control to respectively record, into recording media via the recording part, the converted video together with the video identification information and the divided videos together with the video identification information and the division position identification information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a recording apparatus that performs spatial division or resolution conversion on an input video signal and records the video on a plurality of recording media, and a playback apparatus that reproduces the video recorded on the plurality of recording media. It is about.

  Starting with digital television broadcasting, the quality of video has been improved, and HD (High Definition) video, video with a higher resolution of about 4000 horizontal pixels × 2000 vertical pixels, and 8000 horizontal pixels on the video. X Development of a device that supports a vertical pixel count of 4000 is underway.

  When recording such a high-resolution video, the recording device may be difficult to compress and record the video as it is because of the load at the time of compression processing, the problem of recording capacity, and the problem of video image quality. .

  In order to cope with this, for example, in Patent Document 1, an image frame represented by an input video signal is divided into a plurality of areas, and the input video signal is divided and compressed and encoded individually for each area. By recording on the medium, each of the divided video signals has a low resolution, so that a high-quality video signal can be recorded.

JP 2004-214861 A

  However, the conventional configuration has a problem that the entire video cannot be reproduced when a part of the divided video signal is lost. In addition, there is a problem that the case where the divided video signals are recorded on different recording media has not been studied.

  In order to solve the above-described problems, a recording apparatus of the present invention includes an input unit that inputs a video signal, and a resolution conversion unit that converts the resolution of one frame of the video signal from the input unit and outputs a converted video. And a division unit that spatially divides the video signal of one frame from the input unit, and outputs a plurality of division videos and division position identification information indicating the position of the division video in the video signal before division, and A video identification information adding unit that gives the same video identification information to the converted video and the divided video, and a recording unit that records information on a plurality of recording media, for one frame of video signal from the input unit; A recording system for controlling the recording unit to record the converted video together with the video identification information and the divided video together with the video identification information and the division position identification information via the recording unit. It comprises a part, a.

  With the above configuration, even when a part of the divided video signal is lost when the recorded video is played back, the video is played back without interruption by playing back the converted video with the converted resolution. be able to.

FIG. 2 is a block diagram illustrating a configuration of a recording apparatus according to Embodiment 1. FIG. 3 is a block diagram showing a configuration of a playback device in the first embodiment. 7 is a flowchart showing the operation of the recording apparatus in the first embodiment. Flowchart showing the operation of the playback apparatus in the first embodiment FIG. 4 is a diagram illustrating an example of a data configuration on a recording medium in the first embodiment FIG. 10 is a diagram illustrating another example of the data configuration on the recording medium according to the first embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
(1-1. Configuration of recording apparatus)
FIG. 1 is a block diagram illustrating a configuration of a recording apparatus according to the first embodiment. In FIG. 1, the recording apparatus includes a video space dividing unit 1 that spatially divides an input high-resolution video signal for each frame, and a down-conversion unit 2 that converts the resolution of the input high-resolution video signal into a low-resolution video signal. The video identification information (UMID) is added to the video identification information (UMID) according to the video signal, and the video identification information (UMID) is added to the video identification information (UMID). A video identification information (UMID) giving unit 4 for giving recording medium individual information such as a serial number for identifying a medium, a master recording medium 5 for recording a down-converted low resolution video signal and video identification information (UMID), and a space It comprises a slave recording medium group 6 for recording the divided video signal and video identification information (UMID). Each recording medium in the slave recording medium group 6 is referred to as a slave recording medium 7.

  The video space dividing unit 1 receives a high-resolution video signal of one frame, spatially divides the input high-resolution video signal, and outputs the divided video signal. The video space dividing unit 1 includes a color space dividing unit 14, a surface space dividing unit 15, and a surface space shuffling unit 16. The color space dividing unit 14 performs a process of separating the color signal elements of the RGB signal or the YPBPR signal. The surface space dividing unit 15 performs processing to divide a video signal within one frame of high resolution into 1 / n equal surface spaces when the number of recording media in the slave recording medium group 6 is n. The surface space shuffling unit 16 takes out the pixel elements randomly and evenly from each block obtained by space-dividing the video signal in one frame into n pieces by the surface space dividing unit 15 and re-divides them into n groups. Divide it.

  In the first embodiment, the surface space dividing unit 15 performs surface space division by the number n of recording media of the slave recording medium group 6. However, the number of divisions is not limited to this, and the number is smaller than the number n of recording media. It may be.

  The down-conversion unit 2 receives a high-resolution video signal of one frame, and the video signal for one frame of the high-resolution video is equivalent to the recording time capacity of the master recording medium 5 and the recording time capacity of the slave recording medium group 6. n-resolution down-conversion resolution conversion is performed to generate a low-resolution video signal. The down-conversion unit 2 includes a pixel thinning unit 17 and a horizontal / vertical down-sampling unit 18. The pixel thinning unit 17 receives a high resolution video signal of one frame as input, performs a thinning process on the input high resolution video signal in the time axis direction, and performs a signal band bit rate reduction process. The horizontal / vertical downsampling unit 18 performs horizontal and vertical down-conversion filter processing on the video signal thinned out by the pixel thinning unit 17 to apply a band limitation that falls within a low resolution frequency band, thereby reducing the low resolution. Generate a video signal.

  The video identification information (UMID) assignment control unit 3 generates various video identification information (UMID), which will be described later, from the n divided video signals divided by the video space division unit 1, and also includes video identification information (UMID). ) Is generated at an appropriate timing, and is output to the video identification information (UMID) adding unit 4.

  The video identification information (UMID) adding unit 4 reads individual recording medium information such as serial numbers of the master recording medium 5 and the slave recording medium group 6 and also inputs the video identification input from the video identification information (UMID) giving control unit 3. The information (UMID) and its control signal are combined with the space division video signal input from the video space division unit 1 and output to the slave recording medium group 6 for recording. In addition, the video identification information (UMID) input from the video identification information (UMID) assignment control unit 3 and its control signal are combined with the low resolution video signal input from the down-conversion unit 2 and output to the master recording medium 5. And record.

(1-2. Configuration of playback device)
FIG. 2 is a block diagram showing the configuration of the playback apparatus in the first embodiment. In FIG. 2, the reproducing apparatus reproduces the master recording medium 5 and the slave recording medium group 6 simultaneously or individually, and extracts video identification information (UMID) from each frame for each frame. Based on the control signals from the video identification information (UMID) extraction and coupling control unit 9 that controls various output signals from the extracted video identification information (UMID) and the control signals from the video identification information (UMID) extraction and coupling control unit 9, A video space combining unit 10 that combines one high-resolution video signal for each frame, an up-conversion unit 11 that converts up-resolution resolution of a low-resolution video signal reproduced from the master recording medium 5, and video identification information (UMID) extraction Based on the information from the coupling control unit 9, the high-resolution video output signal from the video space coupling unit 10 and the high-resolution from the up-conversion unit 11. Zodo and an output selecting section 12 for selecting a video output signal. In order to synchronize the synchronization phases of all output signals, the output synchronization control unit 13 generates a synchronization signal based on the control signal from the video identification information (UMID) extraction / coupling control unit 9, and the up-conversion unit 11 Output to the memory unit 22 to match all output phases.

  The video identification information (UMID) extraction unit 8 reproduces the master recording medium 5 and the slave recording medium group 6 simultaneously or individually, and in the reproduced signal from the master recording medium 5, the video identification information (UMID) is extracted from the signal. And the information is output to the video identification information (UMID) extraction / coupling control unit 9. In the reproduction signal from the slave recording medium group 6, the video identification information (UMID) is extracted from the signal, and the information is output to the video identification information (UMID) extraction / coupling controller 9. At the same time, the temporal and spatial relationship between the spatially divided video signal and the video identification information (UMID) is output from the reproduction signal of the slave recording medium group 6 to the video identification information (UMID) extraction / coupling control unit 9. A reproduction signal including a low-resolution image reproduced from the master recording medium 5 is output to the up-conversion unit 11 after the video identification information (UMID) is extracted by the video identification information (UMID) extraction unit 8. A signal including 1 / n space-divided video reproduced from the slave recording medium group 6 is extracted from the video identification information (UMID) by the video identification information (UMID) extraction unit 8, and then the video space combination unit 10. Is output.

  The video identification information (UMID) extraction / combination control unit 9 decodes and analyzes the video identification information (UMID) of each divided video to combine the spatially divided 1 / n space division video signals, and the video space combination unit 10 is output at an appropriate timing. In addition, the output timings of the high resolution video signal generated by the video space combining unit 10, the high resolution video signal generated by the up-conversion unit 11, and the low resolution video signal output from the memory 22 are controlled. A signal is output to each block. Further, the output selection unit 12 is prepared in case the video identification information (UMID) extracted by the video identification information (UMID) extraction unit 8 has some omission or the like and the video space combination unit 10 cannot combine the divided videos correctly. Then, a selection signal for outputting a high-resolution video signal generated by the video space combining unit 10 or a high-resolution video signal generated by the up-conversion unit 11 is output.

  The up-conversion unit 11 converts the input of the low resolution video signal into a high resolution video signal by performing pixel interpolation through horizontal and vertical filters, and outputs it to the output selection unit 12.

  The image space combining unit 10 includes a surface space deshuffling unit 19, a surface space combining unit 20, and a color space combining unit 21. The surface space deshuffling unit 19 performs deshuffling conversion on the divided and shuffled video based on the control signal from the video identification information (UMID) extraction / coupling control unit 9. The plane space coupling unit 20 couples the space-divided 1 / n high-resolution video signal to a high-resolution video signal for one frame based on a control signal from the video identification information (UMID) extraction and coupling control unit 9. . The color space combining unit 21 rearranges the signals separated into the respective elements of the RGB color signal or the YPBPR color signal, and outputs the rearranged signals to the output selection unit 12.

  Based on the control signal from the video identification information (UMID) extraction and coupling control unit 9, the output selection unit 12 and the high resolution video signal generated by the video space coupling unit 10 and the high resolution generated by the up-conversion unit 11. Select which video signal will be final output and output.

(1-3. Data structure of video identification information)
FIG. 5 shows the data structure of video identification information (UMID) recorded on the master recording medium 5.

  The video identification information (UMID) holds a recording device serial number, a slave recording medium serial number and 1 / n division position ID, a content ID, and a master ID for each clip to be recorded. In addition, for each frame, a frame number, date / time, and time code are stored.

  Here, a clip is a set of video signal files, audio signal files, and metadata files related to these video signals from the start to the end of shooting when shooting is performed with a professional camcorder.

  FIG. 6 shows a data structure of video identification information (UMID) recorded on the slave recording medium 7 in the slave recording medium group 6.

  The video identification information (UMID) holds a recording device serial number, a master recording medium serial number, a 1 / n division position ID, a content ID, and a slave ID for each clip to be recorded. In addition, for each frame, a frame number, date / time, and time code are stored.

  The recording device serial number is a serial number assigned to each device in order to uniquely identify the recording device that has recorded the clip, and this value can be used to determine which recording device has recorded the clip. it can.

  The slave recording medium serial number is identification information assigned to read the serial number previously held in the recording medium and uniquely identify the recording medium for each slave recording medium.

  The master recording medium serial number is identification information assigned to read the serial number previously held in the recording medium and uniquely identify the recording medium for each master recording medium.

  The 1 / n division position ID is identification information for identifying which part of the 1 / n equal surface space division is a video signal when the 1 / n equal surface space division is performed.

  The content ID is identification information unique to a clip that is self-generated by this apparatus so as to have a unique value for each recording.

  The master ID is identification information indicating that a down-converted video has been recorded on the master recording medium.

  The slave ID is identification information indicating that a 1 / n equivalent space-space-divided video of the high-resolution video is recorded on the slave recording medium.

  The frame ID is identification information assigned to uniquely identify a frame constituting the video / audio signal.

  The date / time is given for each frame, and is information related to the date / time when the recording of the frame is started.

  The time code is information used for synchronization and editing in the video / audio recording / reproducing apparatus, and is defined based on time information and the like.

(2-1. Operation of recording apparatus)
FIG. 3 is a flowchart showing the operation of the recording apparatus shown in FIG.

  The recording device receives a high-resolution video signal (S301). The recording device distributes the input video signal to the video space division unit 1 and the down-conversion unit 2. The video space division unit 1 and the down-conversion unit 2 operate simultaneously.

  The video space division unit 1 divides the plane space into 1 / n equal parts with the number of recording media of the slave recording medium group 6 = n for the signal of one frame of the high resolution video (S302). The video space division unit 1 outputs information and timing of the video space division to the video identification information (UMID) assignment control unit 3 and outputs the divided high-resolution video to the video identification information (UMID) addition unit 4. .

  The down-conversion unit 2 performs 1 / n resolution down-conversion resolution conversion, which makes the recording time capacity of the master recording medium and the recording time capacity of the slave recording medium group equivalent to the signal for one frame of high-resolution video. A resolution video is generated (S303).

  The video identification information (UMID) assignment control unit 3 reads the space division position information for each space division video obtained from the video space division unit 1, and uses the read space division information and its timing information as video identification information (UMID). It outputs to the grant part 4 (S304).

  The video identification information (UMID) giving unit 4 reads individual recording medium information such as the serial number of the slave recording medium 7 and gives video identification information (UMID) to the slave recording medium group 6 in accordance with the spatially divided video signal. Output and record (S305).

  The video identification information (UMID) giving unit 4 further reads individual recording medium information such as the serial number of the master recording medium 5 and gives video identification information (UMID) in accordance with the down-converted converted video signal. 5 is output and recorded (S306).

(2-2. Operation of playback device)
FIG. 4 is a flowchart showing the operation of the playback apparatus shown in FIG.

  The reproduction apparatus outputs a signal obtained by reproducing the master recording medium 5 and the slave recording medium group 6 simultaneously or individually to the video identification information (UMID) extraction unit 8.

  The video identification information (UMID) extraction unit 8 extracts the video identification information (UMID) shown in FIG. 5 from the playback signal from the slave recording medium group 6 every frame (S401), and extracts the video identification information (UMID) extracted for each frame (S401). UMID) is determined whether it is missing (S403), and the extracted video identification information (UMID) and the presence / absence determination information are output to the video identification information (UMID) extraction coupling control unit 9 and the video space coupling unit 10. To do.

  The video identification information (UMID) extraction unit 8 extracts the video identification information (UMID) shown in FIG. 6 from the reproduction signal from the master recording medium 5 every frame (S402), and the video identification information (UMID) extracted for each frame. ) Is output, and the extracted video identification information (UMID) and the presence / absence determination information are output to the video identification information (UMID) extraction combination control unit 9 and the output selection unit 12 (S404). For the video signal lacking the video identification information (UMID), the low-resolution video signal reproduced from the master recording medium 5 is output as it is (S409).

  The up-conversion unit 11 performs pixel interpolation on the low-resolution video signal reproduced from the master recording medium 5 through horizontal and vertical filters, converts it to an n-fold high-resolution video signal, and outputs it to the output selection unit 12 (S406).

  The video identification information (UMID) extraction and combination control unit 9 decodes the video identification information (UMID) of each divided video in order to combine the space-divided 1 / n divided video signal with one frame of high-resolution video signal. Analyzing and outputting a control signal to the image space combining unit 10 at an appropriate timing (S410). The video space combining unit 10 uses the content ID, the 1 / n division position ID, and the frame No. information in the video identification information (UMID) to convert the space division video reproduced by the slave recording medium group 6 into the original. The high-resolution video is combined and output to the output selection unit 12 (S405).

  The video identification information (UMID) extraction / combination control unit 9 outputs the high-resolution video signal generated by the video space combination unit 10 and the output timings of the high-resolution video signal and the low-resolution video signal generated by the up-conversion unit 11. A signal for controlling is output to each block. Further, the video identification information (UMID) extraction / combination control unit 9 analyzes the missing information of the video identification information (UMID) extracted by the video identification information (UMID) extraction unit 8 and correctly separates the divided video by the video space coupling unit 10. The output selection unit 12 outputs a selection signal as to which of the high-resolution video signal generated by the video space combining unit 10 and the high-resolution video signal generated by the up-conversion unit 11 is finally output. (S410).

  Thus, regardless of the arrangement of each of the slave recording media 7, the high-resolution video can be correctly combined from the content ID, the 1 / n division position ID, and the frame number information shown in FIG. Have.

  The output selection unit 12 uses the video identification information (UMID) extraction / combination control unit 9 to display the content ID and frame No. information from the master recording medium 5 shown in FIG. 5 and the contents of the slave recording medium group 6 shown in FIG. Based on the ID, the 1 / n division position ID, and the frame No. information, the video identification information (UMID) extraction / combination control unit 9 determines whether any of the space division video signals are missing. By receiving the determination information signal, it is selected whether to use the high-resolution video signal generated by the video space combining unit 10 or the high-resolution video signal generated by the up-conversion unit 11 (S407). ) And output as a high-resolution video signal (S408). Thereby, even when one piece of information on the slave recording medium 7 is missing, the high resolution video signal can be output continuously.

  Note that the output selection unit 12 uses the high-resolution video signal generated by the up-conversion unit 11 when any of the space-division video signals is missing. However, the present invention is not limited to this. For example, during normal playback, The high-resolution video signal generated by the higher-definition video space combining unit 10 may be used, and the high-resolution video signal generated by the up-conversion unit 11 may be used during special playback such as fast-forwarding. Thereby, it is possible to reproduce an appropriate high-resolution video signal in accordance with the reproduction form.

(3. Summary)
As described above, according to the recording device and the playback device according to the present embodiment, the converted video having the converted resolution and the spatially divided divided video are generated for the video signal of one frame of the input high resolution video signal. In addition, by adding video identification information that associates the converted video and the divided video with each other, the resolution is converted even when part of the divided video signal is lost when the recorded video is played back. By playing the converted video, the video can be played without interruption.

  Further, when recording the divided video, the slave recording medium is recorded with the content ID, the 1 / n division position ID, and the frame number information, so that the slave recording mediums are arranged in any arrangement. Even so, high-resolution video can be correctly combined.

  Also, when playing back recorded video, by selecting and outputting the video that combines the split video during normal playback and the video that has undergone resolution conversion during special playback, an appropriate high resolution can be selected according to the playback format. A video signal can be reproduced.

  The recording device and the playback device according to the present embodiment perform spatial division or resolution conversion on the input video signal, record the result on a plurality of recording media, and record the information on the plurality of recording media. Since the video can be played without interruption even when a part of the divided video signal is missing, it can be applied and useful in the field of video equipment related industries. It is.

DESCRIPTION OF SYMBOLS 1 Image | video space division part 2 Down conversion part 3 Image | video identification information (UMID) provision control part 4 Image | video identification information (UMID) provision part 5 Master recording medium 6 Slave recording medium group 7 Slave recording medium 8 Image | video identification information (UMID) extraction part 9 Video Identification Information (UMID) Extraction / Combination Control Unit 10 Video Space Combination Unit 11 Up-Conversion Unit 12 Output Selection Unit 13 Output Synchronization Control Unit

Claims (4)

An input unit for inputting a video signal;
A resolution conversion unit that converts a resolution and outputs a converted video for one frame of video signal from the input unit;
A division unit that spatially divides the video signal of one frame from the input unit, and outputs a plurality of division images and division position identification information indicating a position of the division image in the video signal before division;
A video identification information adding unit for giving the same video identification information to the converted video and the divided video corresponding to the same video signal;
A recording unit for recording information on a plurality of recording media;
A recording control unit that controls the recording unit to record the converted video together with the video identification information and the divided video together with the video identification information and the division position identification information;
A recording apparatus comprising: The recording control unit
The recording apparatus according to claim 1, wherein content recording information for uniquely identifying the input video signal is controlled to be recorded on the recording medium. Converted video obtained by converting the resolution of one frame of video signal, video identification information for identifying the video signal of one frame, or divided video obtained by spatially dividing the video signal of one frame, video before division Dividing position identification information indicating the position of the divided video in a signal and video identification information identifying the video signal of one frame are reproduced from a plurality of recorded recording media.
A reading unit for reading information from the plurality of recording media;
A video identification information extraction control unit that controls to read the converted video and the divided video having the same video identification information via the reading unit;
A divided video reproduction unit that generates a video constituting a video before division from the plurality of divided videos based on the division position identification information;
A resolution converter for converting the resolution of the converted video;
An output unit for playing back images,
An output control unit that selects and outputs either the divided video reproduction unit or the output video of the resolution conversion unit to the output unit;
A playback device comprising: The playback apparatus according to claim 3, wherein the output control unit selects and outputs the output video of the divided video playback unit during normal playback and the output video of the resolution conversion unit during special playback.

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