JP3630251B2 - Video editing system, playback device and editing device - Google Patents

Description

[0001]
【table of contents】
The present invention will be described in the following order.
Prior art (FIG. 5)
Means for Solving the Problems to be Solved by the Invention Embodiment of the Invention (FIGS. 1 to 4)
Effect of the Invention
BACKGROUND OF THE INVENTION
The present invention relates to a recording apparatus and a video editing system, and is suitable for application to, for example, editing video data captured by a camera-integrated video tape recorder.
[0003]
Conventionally, a camera-integrated video tape recorder has a dedicated video tape recorder for recording video data composed of image data and audio data formed integrally with the video camera. As shown in FIG. 6, a VHS-C format or 8 [mm] format video tape 2 on which video data has been recorded by a camera-integrated video tape recorder 1 is played back by a playback device 3, and the played back video is displayed on a television. The image is displayed on the screen of the John receiver 4.
[0004]
In recent years, video tape recorders for business use generally record video data using digital signals. In general video tape recorders, 1/4 [inch] digital video tape recorders are being standardized and commercialized as next-generation video tape recorders.
[0005]
[Problems to be solved by the invention]
By the way, highly developed computers are now widely used. On the other hand, as an external recording device so-called streamer for recording data used by a computer on a magnetic tape, a device capable of storing a large amount of data and transferring it at high speed as the computer processing speeds up is used. Therefore, the streamer can record the compressed video data for a practically sufficient time.
[0006]
For this reason, it is thought that it is wasteful to develop the above-described general-use 1/4 [inch] digital video tape recorder and a dedicated camera-integrated digital video tape recorder. Also, when video data recorded by a camera-integrated digital video tape recorder is played back and edited, it takes time to rewind the tape in order to cue the desired video. There was a problem that it was not easy to use and the cost increased.
[0007]
The present invention has been made in consideration of the above points, and intends to propose a recording device and a video editing system having a simple configuration that allows video data recorded on a tape to be easily reproduced and edited by a computer device. Is.
[0008]
[Means for Solving the Problems]
In order to solve such a problem, in the present invention, an image signal corresponding to an image captured by the camera unit is converted into image data of a predetermined file format to be processed by a computer, and then the image data is recorded on a recording medium together with a time code. A recording device, a playback device for playing back a recording medium, and a computer device having a data processing unit for processing image data played back by the playback device, wherein the playback device plays back an image obtained by playing back a recording medium The data is transmitted to the computer device via a predetermined transmission means, and the data processing unit of the computer device displays the video corresponding to the image data transmitted from the playback device and the time code corresponding to the video on the monitor. The time code at the timing specified by the user monitoring the monitor is used as the editing start point. Recognizing and recognizing the time code at the timing designated again by the user as an editing end point, and outputting the editing start point and the editing end point by outputting a control signal indicating the editing start point and the editing end point to the playback device. The edited image data corresponding to the end point is received from the playback device, and the edited image data is generated by returning the edited image data to the image signal before being converted into the file format.
[0009]
The image data of the file format that can be processed by the computer recorded on the recording medium by the recording device is played back by the playback device, and the playback video is displayed on the monitor by the computer device together with the time code, and the edit start point and Since the edited image data between the editing start point and the editing end point can be imported from the playback device to the computer device by a simple operation that only indicates the editing end point, the computer device converts the edited image data to a file format. An edit video corresponding to the edit start point and the edit end point can be easily generated simply by returning to the previous image signal.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 shows the overall configuration of a video editing system 11 according to the present invention. The video editing system 11 is a camera-integrated video tape recorder 12 which is a recording side equipped with a streamer, a tape 13 which is a recording medium for recording video data by the streamer, and the recorded video data is read out by a computer streamer 14. After being taken in via the cable 15, it is composed of a computer device 16 which is a reading side for editing.
[0012]
The video editing system 11 includes a computer device 16 that generates an analog video signal composed of an image signal generated by imaging with a camera head 17 of a camera-integrated video tape recorder 12 as a recording device and an audio signal generated by picking up a microphone 18. It is converted into digital video data that can be read by recording on the tape 13. A computer streamer 14 serving as a playback device plays back the tape 13 to read video data, and transmits the video data requested by the user to the computer device 16 via the SCSI cable 15.
[0013]
As shown in FIG. 2, the camera-integrated video tape recorder 12 includes a camera head 17, a microphone 18, a streamer 19 as a recording / reproducing unit, and an output as a data conversion unit that communicates data between the camera head 17 and the streamer 19. An interface unit 20 and a SCSI (small computer systems interface) cable 21 are included.
[0014]
The camera head 17 sends the video signal S1 to the analog / digital converter 22 of the output interface unit 20. The analog / digital converter 22 converts the video signal S 1 into digital data S 2 and sends it to the encoder 23.
[0015]
The encoder 23 encodes and compresses the digital data S2 in accordance with the MPEG (Motion Picture Experts Group) standard, and sends it to the video memory 24 as data S3. The video memory 24 temporarily stores data S3.
[0016]
The image processing CPU 26 controlled by the main CPU 25 takes in a control signal CTL1 generated by processing with a SCSI driver program (hereinafter referred to as a SCSI driver) incorporated in the RAM 27 and sends it to the video memory 24. Then, the video memory 24 sends the data S3 as data S4 to the SCSI formatter 28 in the order of FIFO (First-In First-Out) according to the control signal CTL1 given from the image processing CPU 26.
[0017]
The SCSI formatter 28 converts the data S4 into a file format that can be processed by the computer device 16. Further, the SCSI formatter 28 divides the converted data into logical blocks of a predetermined data size according to the logical format shown in FIG. 3, and sequentially adds identification numbers (ID1, ID2,..., ID7000) to the respective logical blocks. At the same time, the data size and address information of each logical block are added as a header before the first logical block (ID1) and converted to SCSI standard data S5. Thereafter, the SCSI formatter 28 transmits the data S5 to the buffer 30 of the streamer 19 via the buffer 29 and the SCSI cable 21.
[0018]
The CPU 31 of the streamer 19 takes in the control signal CTL 2 generated by processing with the SCSI driver incorporated in the RAM 32 and sends it to the video memory 33. The video memory 33 sends the data S5 fetched from the buffer 30 to the ECC (Error Correcting Code) circuit 34 as data S6 in the order of FIFO according to the control signal CTL2. The ECC circuit 34 adds a parity bit for error correction to the data S6 and sends it to the formatter 35 as data S7.
[0019]
The formatter 35 generates arbitrary information other than video data to be recorded in an unused area provided at the head of the tape 13 in accordance with the tape format shown in FIG. 4, and inserts a preamble into each logical block, The code is added and sent to the RF amplifier 36 as data S8.
[0020]
The RF amplifier 36 amplifies the data S8 to a predetermined level and sends it to the recording / reproducing head 37 as data S9. The recording / reproducing head 37 records the data S9 on the tape 13. Thereby, the camera-integrated video tape recorder 12 can convert the video signal S1 into data in a file format that can be processed by the computer device 16 and record the data on the tape 13.
[0021]
Next, as shown in FIG. 5, the configurations of the computer streamer 14 on the data reading side and the computer interface unit 41 of the computer device 16 are shown.
The computer streamer 14 sends a reproduction RF signal S 10 obtained by reproducing the tape 13 with the head 42 to the RF amplifier 43. The RF amplifier 43 amplifies the RF signal S10, converts it into data S11 via an internal analog / digital converter (not shown), and sends it to the formatter 44.
[0022]
The formatter 44 converts the data S11 into a data string before being formatted according to the tape format shown in FIG. 4, and sends it to the ECC circuit 45 as data S12. The ECC circuit 45 corrects the data error by calculating the data loss caused by the recording / reproducing of the tape based on the previously added parity bit, and sends it to the video memory 46 as data S13.
[0023]
Further, the CPU 47 inputs a control signal CTL 3 generated by processing with a SCSI driver incorporated in the RAM 48 of the computer interface unit 41 from the CPU 50 via the SCSI cable 15. Incidentally, the control signal CTL3 is a signal for instructing a time code of desired video data to be edited by the user. The CPU 47 processes the control signal CTL 3 with a SCSI driver incorporated in the RAM 51 to generate the control signal CTL 4, and sends it to the video memory 46.
[0024]
The video memory 46 transmits the video data of the time code instructed according to the control signal CTL4 as the data S14 to the buffer 53 via the buffer 52 and the SCSI cable 15. The CPU 50 of the computer interface unit 41 fetches the data S 14 transmitted to the buffer 53 into the SCSI formatter 54.
[0025]
The SCSI formatter 54 removes the identification number from the fetched data S14, converts the data into continuous data S15 before being formatted according to the logical format shown in FIG. Thus, the data S15 becomes file format video data that can be easily processed by the computer device 16. At this time, the CPU 50 takes out video data to be displayed on the monitor screen and a time code corresponding to the video data, and displays them on the monitor screen during reproduction. The video memory 55 sends the data S15 to the decoder 56 as data S16 in the FIFO order.
[0026]
The decoder 56 decodes the data S16 and sends it to the digital / analog converter 57 as data S17. The digital / analog converter 57 converts the data S17 into an analog video signal S18 and outputs it. Thus, the computer device 16 can capture the video data of the identification number designated by the control signal CTL3 corresponding to the time code designated by the user.
[0027]
In the above configuration, the video signal S1 imaged by the camera-integrated video tape recorder 12 is converted into data in a file format that can be processed by the computer device 16 by the SCSI formatter 28 of the output interface unit 20, and is transferred to the tape 13 of the streamer 19. To be recorded.
[0028]
When editing the video data recorded on the tape 13, the user reproduces the tape 13 with the computer streamer 14 and edits it with the computer device 16. At this time, the user designates a time code corresponding to the desired video data currently being reproduced.
[0029]
The computer device 16 recognizes the time code designated by the user as the start point of editing, and recognizes the time code designated by the user as the end point of editing in the same procedure. Thereby, the computer device 16 can reproduce and easily edit the video data corresponding to the time code from the start point to the end point instructed by the user by the computer streamer 14.
[0030]
According to the above configuration, the video editing system 11 converts the video data into the file format video data that can be processed by the computer device 16 by the camera-integrated video tape recorder 12 and records the video data on the tape 13. Thus, the video data recorded on the tape 13 can be easily reproduced and edited by the computer device 16 by being reproduced by the streamer 14 and taking in the file format video data. Further, by processing the video data recorded and reproduced by the streamer 19 with the computer device 16, the configuration can be simplified as a whole.
[0031]
Also, the video editing system 11 can transmit the edited video data to a remote place in accordance with a broadcasting system such as a composite signal and a component signal using a computer network such as Ethernet.
[0032]
In the above-described embodiment, the case where the SCSI formatter 28 converts the data into the data conforming to the SCSI standard has been described. However, the present invention is not limited to this, and any standard that can be processed by a computer device, for example, VME (Versa Module). (Europe) Data may be converted according to an arbitrary standard such as a standard and transmitted by other transmission means such as a VME bus. In this case, the same effect as described above can be obtained.
[0033]
In the above-described embodiment, the case where the logical format having the configuration shown in FIG. 3 is used has been described. However, the present invention is not limited to this, and the logical format may be of another configuration as long as it can be formatted into a file format that can be processed by a computer. Things can be used.
[0034]
In the above-described embodiments, the case where a tape is used as the recording medium has been described. However, the present invention is not limited to this, and an arbitrary recording medium may be used.
[0035]
Furthermore, in the above-described embodiment, a case has been described in which video data is recorded on the tape 13 by the streamer 19, data is read by the computer streamer 14 using the tape 13 as a recording medium, and video is reproduced and edited by the computer device 16. However, the present invention is not limited to this, a modem as modulation / demodulation means is connected to the buffer 30 of the streamer 19, and video data read out by the recording / reproducing head 37 is transmitted to a remote computer device using a telephone line. It may be transmitted using radio waves. As a result, the video data recorded in the field can be quickly transmitted after being imaged and edited by the computer device.
[0036]
【The invention's effect】
As described above, according to the present invention, image data in a file format that can be processed by a computer recorded on a recording medium by a recording device is played back by the playback device, and the playback video is displayed on the monitor by the computer device together with the time code. Since the edited image data between the edit start point and the edit end point can be taken from the playback device to the computer device by a simple operation that only allows the user to specify the edit start point and the edit end point at a desired timing. The apparatus can easily generate an edited video corresponding to the editing start point and the editing end point simply by returning the edited image data to the image signal before the file format conversion, and thus the video data recorded on the recording medium can be generated by the computer. A video editing system that can be easily played back and edited by the device can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a configuration of a video editing system.
FIG. 2 is a block diagram showing the configuration of a camera-integrated video tape recorder equipped with a streamer.
FIG. 3 is a schematic diagram showing a logical format;
FIG. 4 is a schematic diagram showing a tape format.
FIG. 5 is a block diagram showing a configuration of a computer device and a computer streamer.
FIG. 6 is a schematic diagram showing the process from recording to playback of conventional video data.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,12 ... Camera integrated video tape recorder, 2, 13 ... Tape, 3 ... Playback apparatus, 4 ... Television receiver, 11 ... Video editing system, 14 ... Computer streamer, 15, 21 ...... SCSI cable, 16 ... Computer device, 17 ... Camera head, 18 ... Microphone, 19 ... Streamer, 20 ... Output interface unit, 22 ... Analog / digital converter, 23 ... Encoder, 24, 33, 46, 55 ... Video memory, 28, 54 ... SCSI formatter, 25 ... Main CPU, 31, 47, 50 ... CPU, 27, 32, 48, 51 ... RAM, 29, 30, 52, 53 …… Buffer, 34, 45 …… ECC circuit, 35, 44 …… Formatter, 36, 43 …… RF amplifier, 37 …… Recording / reproducing head 42 ...... head, 41 ......-computer in tough ace unit, 56 ...... decoder, 57 ...... digital / analog converter.

Claims (6)

And recordings device the image data that records on a recording medium together with the time code after converted into image data of a predetermined file format to process the image signal according to the image captured by the computer by the camera unit,
A reproducing apparatus for reproducing the recording medium;
A computer device having a data processing unit for processing the image data reproduced by the reproduction device ;
The playback device is
Transmitting the image data obtained by reproducing the recording medium to the computer device via a predetermined transmission means;
The data processing unit of the computer device is configured to display a video corresponding to the image data transmitted from the playback device and the time code corresponding to the video on a monitor by a user who is monitoring the monitor. The time code at the designated timing is recognized as the editing start point, the time code at the timing designated again by the user is recognized as the editing end point, and the control signal indicating the editing start point and the editing end point is reproduced. The edited image data corresponding to the edit start point and the edit end point is received from the playback device by outputting to the device, and the edited video is returned to the image signal before the edit image data is converted into the file format. A video editing system characterized by generating . Reproduction means for reproducing image data obtained by converting an image signal captured by the camera unit into a predetermined file format to be processed by a computer from a recording medium together with a time code corresponding to the image data;
An input means for inputting a control signal indicating an editing start point or an editing end point of the image data designated by the user;
Control means for controlling the reproduction operation of the reproduction means based on the control signal input by the input means;
Output means for outputting edited image data controlled by the control means to the computer device together with the time code;
A playback device comprising: The reproducing means has a memory unit for storing the image data,
The control means controls an input / output operation of the memory unit so as to generate edited image data corresponding to the time code from the editing start point to the editing end point.
The reproducing apparatus according to claim 2, wherein: A reproduction step of reproducing image data obtained by converting an image signal captured by the camera unit into a predetermined file format to be processed by a computer from a recording medium together with a time code corresponding to the image data;
An input step of inputting a control signal indicating an editing start point or an editing end point of the image data designated by the user;
A control step for controlling the reproduction operation in the reproduction step based on the control signal input in the input step;
An output step of outputting the edited image data reproduced by the control of the control step to the computer device together with the time code;
A playback method characterized by comprising: The image signal captured by the camera unit is converted into a predetermined file format for processing by the computer. The time code at the timing designated by the user for the image data recorded on the recording medium is output as a control signal indicating the editing start point or the editing end point of the image data to an output device for reproducing the recording medium. Means,
Input means for inputting edit image data corresponding to the time code from the edit start point to the edit end point from the playback device;
Image conversion means for returning the edited image data input by the input means to an image signal before conversion to the file format;
Display output means for displaying and outputting the image signal returned before the file format conversion by the image conversion means;
An editing device characterized by comprising: The time code of the timing designated by the user for the image data recorded on the recording medium after the image signal captured by the camera unit is converted into a predetermined file format to be processed by the computer is edited or the editing start point of the image data An output step of outputting to the playback device that plays back the recording medium as a control signal indicating an end point;
An input step of inputting edited image data corresponding to the time code from the edit start point to the edit end point from the playback device;
An image conversion step for converting the edited image data input in the input step back to an image signal before conversion into the file format;
A display output step for displaying and outputting the image signal returned before the file format conversion in the image conversion step;
The editing method characterized by comprising.

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