JPH08221950A - Method for recording and reproducing and device therefor - Google Patents

Abstract

PURPOSE: To provide a reproduced image without a noise by reading out the input video/audio signals to be recorded from an auxiliary recording medium when the position of a main recording medium is located on the editing point of the main recording medium. CONSTITUTION: A system controller 17 recognizes a recording track before an editing point by means of a time code supplied from an error correction processing circuit 22 and, when a timing signal is supplied from a track information detecting circuit 16, instructs a memory controller 19 to start reading-out for recording. The memory controller 19 reads out address data recorded in a storage part by the instruction from the system controller 17 and supplies them to a memory 8d together with a control signal. Consequently, stored data Min are successively read out, supplied to a magnetic head of a tape transport 11 and successively recorded in a recording track starting from an audio sector AV corresponding to the position of an editing point 1P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing method and apparatus suitable for being applied to, for example, a digital VTR of a multi-segment recording system.

[0002]

2. Description of the Related Art Conventionally, as an editing system using a VTR, for example, the one shown in FIG. 12 has been proposed.

[Connection and Configuration] The editing system shown in FIG. 12 has a reproducing side VT for reproducing the video tape cassette 100 in which the material to be dubbed is recorded.
R102 and recording side VT for recording the reproduction signal
R118, and the playback side VTR 102 and recording side VT
It is composed of an editing controller for controlling R118.

Here, the reproducing VTR 102 and the recording V
The TRs 118 are VTRs of composite or component analog recording type.

The reproducing VTR 102 has magnetic heads 103 and 104 mounted on a rotating drum (not shown), and the magnetic head 103 has one fixed contact 10 of a switch 105.
5a, the magnetic head 104 is connected to the other fixed contact 105b of the switch 105, and the movable contact 105c of the switch 105 is connected to the VTR main circuit 106.

The recording side VTR 118 has magnetic heads 119 and 110 mounted on a rotating drum (not shown), and the magnetic head 119 is one fixed contact 11 of a switch 111.
1a, the magnetic head 110 is connected to the other fixed contact 111b of the switch 111, and the movable contact 111c of the switch 111 is connected to the VTR main circuit 112.

The editing controller 120 is a playback side VTR.
102 and the recording-side VTR 118, respectively, and is based on the synchronizing signal of the reproducing-side VTR 102 or the CTL signal recorded by a fixed head (not shown).
R118 is phased to synchronize the reproducing VTR 102 and the recording VTR 118.

[Operation] During so-called dubbing,
With the playback VTR 102 and the recording VTR 118 synchronized by the editing controller 120, the playback VTR 102
The reproduced video signal supplied from TR102 is the VTR on the recording side.
It is supplied to the recording side VTR 118 and recorded by the magnetic heads 119 and 110 of the recording side VTR 118 so as to form inclined tracks on the magnetic tape of the video tape cassette 113. At the same time, a fixed head (not shown) records a CTL (control) signal on a track (control track) in the longitudinal direction of the magnetic tape. As is well known, the CTL signal is recorded corresponding to one recording track.

In addition, at the time of so-called insertion, in which a part of the reproduced video signal obtained by reproducing the video tape cassette 100 is recorded on a predetermined track of the magnetic tape of the video tape cassette, the following is performed. Like

In the editing controller 120, the video tape cassette 100 set in the VTR 102 on the reproducing side is reproduced, and the in point (here, the insert start point) and the out point (here, the insert end point) of the reproduced video signal. ) And are determined by key input. In other words, the edit controller 120 uses the CTL from the playback VTR 102.
The signal is counted, and the value when there is a key input (in addition to the count number itself, it may be converted time information) is held.

On the other hand, the video tape cassette 113 set in the recording VTR 118 is reproduced, and the insert start point is determined by key input while watching the reproduced video signal. In other words, the edit controller 120 counts the CTL signal from the playback VTR 102 and holds the value when the key is input (in addition to the count number itself, it may be converted time information).

After the above-mentioned preprocessing is completed, by inputting a key (not shown) of the editing controller 120,
The edit controller 120 supplies control signals to the playback-side VTR 102 and the recording-side VTR 118, respectively, and controls the playback-side VT.
The position of the magnetic tape of the video tape cassette 100 set in R102 is set to the position before the IN point, that is, the position including the pre-roll portion, and similarly, the recording side VTR 11
Video tape cassette 113 set in 8
The position of the magnetic tape is set to the position before the insert point, that is, the position including the pre-roll portion.

The edit controller 120 sets the video values set in the reproducing-side VTR 102 and the recording-side VTR 118, respectively, based on the held values and the CTL signals supplied from the reproducing-side VTR 102 and the recording-side VTR 118, respectively.
The position of each magnetic tape in the tape cassettes 100 and 113 can be controlled.

Then, the edit controller 120 supplies control signals indicating the start of reproduction to the reproducing VTR 102 and the recording VTR 118, respectively. Editing controller 12
0 counts the CTL signals supplied from the reproducing VTR 102 and the recording VTR 118, and the reproducing VTR 10
When the value obtained by counting the CTL signal supplied from 2 becomes the time code at the IN point, a control signal is supplied to the recording-side VTR 118 to bring the recording-side VTR 118 into the recording state. As a result, reproduced video signals sequentially supplied from the reproducing side VTR 102 are recorded from the insert position on the magnetic tape of the video tape cassette 113 set in the recording side VTR 118. At this time, the edit controller 120 receives the C supplied from the playback VTR 118.
C supplied from the recording side VTR 118 to the phase of the TL signal
Record side VTR 118 so that the phases of the TL signals match.
A servo is applied to the position of the magnetic tape of the video tape cassette 100 set in the VTR 102 on the reproducing side and the position of the magnetic tape of the video tape cassette 113 set in the VTR 118 on the recording side to match each other. Had to do the phase.

The applicant has previously displayed the first and second points of the image data of a predetermined unit on the display means, and the first and second points of the predetermined unit displayed on the display means. Image data is designated by the designating means, and the time code data of the image data at the first or second point designated by the designating means, the state of the related equipment, and the identification number are displayed by the control means, thereby improving the editing efficiency. Editing device that can improve the usability as well as
For example, it is possible to change the contents of the edit files EDL1 to EDLn by deleting, copying, moving, and exchanging the position of the image data in edit units displayed on the screen using a pointing device or a keyboard. You can perform editing work without performing any troublesome work such as playing and rechecking, checking the memory address etc. with the keyboard etc. and entering it, thereby improving the efficiency of editing work. We propose an editing device that can be done (Japanese Patent Application No. 5-874).
No. 13).

[0016]

The editing system as described above, however, has the following problems.

[Problem 1] In the above editing system,
This is a case of using a digital VTR which records so that N tracks are defined as 1 segment and 1 field is configured by M segments, that is, so-called multi-segment recording is performed. For example, compared to an analog VTR that records two tracks to form one frame, a digital VTR has a large number of recording tracks that must be reproduced at the same time, that is, a large amount of information. Response of tape access to analog V
It is difficult to make it equal to that of TR.

[Problem 2] AV of general users is increasing more and more in recent years.
The interest in (audio / visual) devices has increased, and along with this, the knowledge and the technical level for using the devices have been improved, and as a result, the devices required by general users are closer to those for business use. Also,
As for commercial equipment, more sophisticated and highly accurate equipment is required. In other words, whether for general or business use
There is a demand from the user side to further improve the accuracy of the equipment, and therefore the manufacturer side must also respond to this demand. In the editing system as described above, for example, in the case of insert editing or the like, it is a condition that the insert is performed at the position intended by the user, and further, the accuracy of the insert is required to be as high as possible.

Here, the high precision means that, for example, the recording track formed by inserting does not overlap the tracks before and after it, and the recording start position is the same as the recording start position of the original recording track. It means that.

In order to increase the accuracy, the accuracy of the mechanical system is more important than the circuit system for running the magnetic tape. In other words, the electrical processing can improve the accuracy, but the mechanical system that must follow the electrical processing is different from the individual accuracy (dimension, shape, etc.) of each component that constitutes the mechanical system. Assembling accuracy of these parts is the most important.

However, in order to meet the user's request, the accuracy of the mechanical system is improved to improve the operation accuracy of the VTR, and thus the editing accuracy at the time of editing is improved. Since it is necessary to improve the precision of the components and the precision of assembling them, for example, the precision of the equipment that manufactures the components may be increased, or specialized craftsmen may make each one by hand.
As a result, a large change in equipment for manufacturing, a large investment, etc., resulting in a significant increase in the manufacturing cost of the mechanical system,
Eventually, the cost of the device will increase infinitely, which will impose a heavy financial burden on the user. Further, by giving a large financial burden, many users cannot use such a device, and as a result, it is not possible to improve the accuracy of various processes performed using the device. For example, the editing system described above. In such cases, conventional equipment must be used, and if such users are providing video and audio to users such as viewers, the quality of the video and audio to be provided to the user. Can't be improved at any time.

[Problem 3] In the VTR used in the above editing system, when slow motion reproduction is performed without producing noise on the screen, a bimorph for swinging the head left and right with respect to the recording track is used. However, a so-called DT (dynamic tracking) system including a control circuit for generating a high voltage in the bimorph is required, and when this system is used, the cost of the device increases, and as a result, the problem 2 is encountered. It will be similar.

Further, in this dynamic tracking, the reproduction speed at which the head can follow the recording track is 2 to 3 times the normal reproduction speed, that is, double speed reproduction.
3X speed reproduction is technically limited, and it is difficult to make the head follow a recording track at a reproduction speed higher than this. Therefore, even if an expensive dynamic tracking system is adopted, reproduction exceeding 3X speed reproduction is performed. At speed, good reproduction cannot be performed due to noise on the screen.

[Problem 4] Therefore, in order to obtain an image of reproduction exceeding 3 × speed reproduction, for example, 10 × speed reproduction,
1. Double-speed reproduction is performed once, the image obtained by the double-speed reproduction is recorded on a magnetic tape, the magnetic tape is reproduced again at double-speed, and the image is recorded on the magnetic tape. Playing at 5 times speed is very troublesome.

[Problem 5] Further, in the above editing system, when a CTL head for recording a CTL signal on a control track and a VTR without a circuit for generating a CTL signal are used, a magnetic tape is used. It is difficult to control the access to the magnetic tape at high speed and with high accuracy because there is no signal to be used as a reference for running the tape. Especially, in editing, the reference for performing phase adjustment on a plurality of VTRs. Since there is no signal, the operability during editing deteriorates.

The most well-known VTR without a CTL head for recording the CTL signal on a control track and a circuit for generating the CTL signal is a VTR having a tape width of 8 mm (so-called 8).
mmVTR) is well known, for example, this 8mmVT
In R, the size of the video tape cassette is very small compared to the size of the well-known beta system or VHS system video tape cassette, and therefore, this video
The size of the cassette compartment for holding the tape cassette is also very small.

Currently known products are very small, such as a stationary type, a portable type integrated with a liquid crystal display, an in-vehicle type (type mounted in a vehicle), a camera integrated type, and the like. And, there is a multi-functional product.
Among these products, products that are directly related to the user's range of action or utilization of limited space, such as portable type, vehicle-mounted type, and camera-integrated type, are more compact.
The purpose of making it lighter is probably the purpose of the manufacturer to respond to user requests.

That is, in the VTR having a small size of its components and recording medium (width of magnetic tape or size of cassette) like the above 8 mm VTR, it is possible to achieve the above object while realizing high image quality. It's the most possible, and for one reason, it's no exaggeration to say that it was developed for that purpose.

Therefore, the head for recording the CTL signal on the control track and the CT for the head are recorded.
It is not a good idea to mount a circuit for supplying an L signal on a VTR typified by an 8 mm VTR, from the viewpoint of the user, from the viewpoint of cost as well as from the above purpose. .

The present invention has been made in consideration of the above points, and improves the accuracy and access speed of the tape running system, and even at a reproducing speed exceeding 3 times speed without using parts for dynamic tracking. An object of the present invention is to provide a recording / reproducing method and an apparatus thereof which can obtain a noise-free image on a screen and can reduce the size, weight and cost of the apparatus.

[0031]

According to the recording / reproducing method of the present invention,
A recording / reproducing method used in a device in which input video and audio signals to be recorded are subjected to signal processing for recording, and the input video and audio signals subjected to the signal processing for recording are recorded in a main recording medium. When the input video and audio signals to be recorded are recorded from the editing point of the main recording medium, the input video and audio signals to be recorded are subjected to signal processing for recording and then once recorded on the main recording medium. Based on position information on the main recording medium obtained by recording on an auxiliary recording medium having an access speed faster than that of the recording medium, reproducing the main recording medium, and reproducing the main recording medium, When the timing for reading the input video and audio signals to be recorded is obtained from the edit point on the auxiliary recording medium and the position of the main recording medium becomes the edit point on the main recording medium, the timing Based on timing, it reads the input video and audio signals to be the recording from the auxiliary recording medium,
It is recorded on the main recording medium.

In the recording / reproducing method of the present invention, the input video and audio signals to be recorded are subjected to signal processing for recording, and the input video and audio signals subjected to the signal processing for recording are recorded in the main recording medium. First device and second device
In the recording / reproducing method used between the first and second devices, when the video and audio signals obtained by the reproduction by the first device are recorded from the edit point of the main recording medium of the second device, The video and audio signals obtained by being reproduced by the device described above are once recorded in the auxiliary recording medium having an access speed faster than that of the main recording medium of the first device, and then the recorded video and audio signals are read out, An audio signal is output as a reproduced video and audio signal for a monitor, and while the reproduced video and audio signal for the monitor are being output, an edit point to be recorded on the main recording medium of the second device can be designated. If there is, the address data of the designated video and audio signals on the auxiliary recording medium is held, the main recording medium of the second device is reproduced, and the main recording medium is reproduced. On main recording medium The timing of reading the specified video and audio signals from the edit point on the auxiliary recording medium from the auxiliary recording medium of the first device is obtained based on the position information, and the position of the main recording medium of the second device is obtained. Becomes an edit point on the main recording medium, the video and audio signals subsequent to the video and audio signals designated by the first device are transferred to the auxiliary recording medium of the first device based on the timing. From the edit point, the read video and audio signals are subjected to signal processing for reproduction, and then output to the second device for recording, and recorded from the edit point to the main recording medium of the second device. It is a thing.

In the recording / reproducing method of the present invention, the input video and audio signals recorded on the main recording medium are reproduced, the reproduced video and audio signals are subjected to signal processing for reproduction, and the signals for reproduction are reproduced. A recording / reproducing method used in a device which outputs processed video and audio signals as reproduction signals, wherein the video and audio signals recorded in the main recording medium are N times as fast as a normal reproduction speed. When reproducing at the reproduction speed, the video and audio signals obtained by reproducing the main recording medium at the normal reproduction speed are temporarily recorded on an auxiliary recording medium having an access speed faster than that of the main recording medium, and the auxiliary recording is performed. When the video and audio signals are read from the medium, the video and audio signals are output at least every N frames.

Further, the recording / reproducing apparatus of the present invention records the video and audio signals from the recording processing means for recording the video and audio signals to be recorded on the main recording medium. A recording / reproducing means for reproducing a video and audio signal from the main recording medium; a video and audio signal from the recording processing means; and a main recording the video and audio signal reproduced by the recording and reproducing means. An auxiliary recording medium having a faster access speed than the recording medium,
Video and audio signals reproduced by the recording / reproducing means,
And a reproducing system for performing a reproducing process on the video and audio signals from the recording processing means, and the recording / reproducing means is continuously, intermittently or stopped based on the recording mode and the reproducing mode. The auxiliary recording medium is controlled in such a state that the read output from the auxiliary recording medium is apparently reproduced from the main recording medium and directly output during reproduction from the main recording medium. At the time of recording the video and audio signals on the main recording medium, the apparently input video and audio signals are directly recorded on the main recording medium by apparently reading out the output from the auxiliary recording medium.

Further, the recording / reproducing apparatus of the present invention records the video and audio signals to be recorded on the main recording medium and the recording processing means for performing recording processing on the main recording medium. A recording / reproducing means for reproducing a video and audio signal from the main recording medium; a video and audio signal from the recording processing means; and a main recording the video and audio signal reproduced by the recording and reproducing means. An auxiliary recording medium having a faster access speed than the recording medium,
Video and audio signals reproduced by the recording / reproducing means,
And a reproduction system for performing reproduction processing on the video and audio signals from the recording processing means, auxiliary recording medium control means for controlling writing or reading of the video and audio signals on the auxiliary recording medium, and Control means for controlling the recording / reproducing means so as to be continuous, intermittent or stopped, and for controlling timing of the auxiliary recording medium control means, based on the mode and the mode at the time of reproduction. By the control, when reproducing from the main recording medium, it is assumed that the read output from the auxiliary recording medium is apparently reproduced from the main recording medium and directly output, and the When recording audio signals, the video and audio signals that are apparently input are read directly from the auxiliary recording medium and directly input into the main recording. Is obtained is assumed to be recorded in the body.

The recording / reproducing apparatus of the present invention records the video and audio signals to be recorded on the main recording medium and the recording processing means for performing recording processing on the video and audio signals. A recording / reproducing means for reproducing a video and audio signal from the main recording medium; a video and audio signal from the recording processing means; and a main recording the video and audio signal reproduced by the recording and reproducing means. An auxiliary recording medium having a faster access speed than the recording medium,
Video and audio signals reproduced by the recording / reproducing means,
And a reproduction system for performing reproduction processing on the video and audio signals from the recording processing means, auxiliary recording medium control means for controlling writing or reading of the video and audio signals on the auxiliary recording medium, and The recording / reproducing means is controlled so as to be continuously, intermittently, or stopped based on the mode and the mode at the time of reproduction, and the main means is controlled by the recording / reproducing means and the control means for controlling the timing of the auxiliary recording medium controlling means. The input video and audio to be recorded from the auxiliary recording medium from the edit point on the auxiliary recording medium based on the position information on the main recording medium obtained by reproducing the recording medium and reproducing the main recording medium. A timing generating means for obtaining a timing signal for reading the signal is provided, and the input video and audio signals to be recorded are recorded from the editing point of the main recording medium. In this case, after the input video and audio signals to be recorded are subjected to signal processing for recording by the recording processing means, the auxiliary recording medium control means performs recording by the recording processing means under the control of the control means. The video and audio signals that have been subjected to the signal processing for once are once recorded in the auxiliary recording medium, and when the position of the main recording medium becomes an edit point on the main recording medium, Based on the timing signal, the auxiliary recording medium control means reads the input video and audio signals to be recorded from the auxiliary recording medium and records them on the main recording medium.

According to the present invention, in the above recording / reproducing apparatus, the timing generating means includes the position information extracting means for extracting the position information from the reproduction signal reproduced by the recording / reproducing means, and the position information extracting means. Time measuring means for measuring time from the time when the position information is extracted,
Playback time information used for playing between the sector in which the position information is recorded and the sector for recording the next video and audio signal, and the video and audio signal are read from the auxiliary recording medium. To the auxiliary recording medium control means based on the reproduction time information and the signal transmission time information, and holding means for holding the signal transmission time information that is consumed until the recording is actually started on the main recording medium. Comparing the control timing time information from the computing means with the control timing time information from the computing means and the measurement time information from the time measuring means, and if they match, information auxiliary recording to the control means And a timing generating means for supplying a timing signal serving as a reference for controlling the medium.

According to the present invention, in the above recording / reproducing apparatus, at least two recording / reproducing apparatuses are prepared, one recording / reproducing apparatus (hereinafter referred to as a first apparatus) on the reproducing side and the other recording / reproducing apparatus (hereinafter When the video and audio signals obtained by reproduction by the first device are recorded from the edit point of the main recording medium of the second device, the first device is used as the second device. After the video and audio signals obtained by reproduction by the device are once recorded in the auxiliary recording medium by the auxiliary recording medium control means of the first device, the recorded video and audio signals are read out, and the read out video and audio signals Should be recorded on the main recording medium of the second device while outputting the reproduced video and audio signals for the monitor through the reproduction processing means and while outputting the reproduced video and the audio signals for the monitor. Edit point When specified, the address data of the specified video and audio signals on the auxiliary recording medium is held by the control means, and the main recording medium of the second device is played back by the recording / playback means, Based on the position information on the main recording medium obtained by reproducing the main recording medium, the timing of reading the designated video and audio signals from the edit point on the auxiliary recording medium of the first device is set to the above-mentioned timing. When the position of the main recording medium of the second device becomes an edit point on the main recording medium, the control means of the first device obtains the timing generating means of the first device. Based on the timing signal from the timing generating means, the video and audio signals after the video and audio signal designated by the first device are read from the auxiliary recording medium of the first device, and the reading is performed. The output video and audio signals are subjected to signal processing for reproduction by the reproduction processing means of the first device, and then output to the second device for recording, and are output to the main recording medium of the second device. Recording is performed from the editing point by the recording / reproducing means of the second device.

In the recording / reproducing apparatus of the present invention, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed of 1 / N times the normal reproduction speed, the main recording medium is reproduced. From the auxiliary recording medium control means, the auxiliary recording medium control means temporarily records the video and audio signals obtained from the auxiliary recording medium, and the auxiliary recording medium control means controls the video and audio signals from the auxiliary recording medium. At the time of reading, the video and audio signals of at least the original frame are output N times.

Further, in the present invention according to each of the above inventions, when the video and audio signals are read from the auxiliary recording medium and the video signal of at least the original frame is output N times, the first half of the video is the video of the first field. The video signal of the original frame is used for the center frame, and the video signal of the second field is used for the latter half frame.

In the present invention according to each of the above inventions, the video and audio signals obtained by reproducing from the main recording medium are recorded on the auxiliary recording medium, and the video and audio signals are read from the auxiliary recording medium. When performing / N speed playback,
The auxiliary recording medium control means records a predetermined amount of M video and audio signals on the auxiliary recording medium in a period having a length of M times the unit period, and records the M video and audio signals. M recorded later from the auxiliary recording medium in the above period
The individual video and audio signals are sequentially read out within a period of M × N times the unit period.

Further, in the present invention according to each of the above inventions, the video and audio signals obtained by reproducing from the main recording medium are recorded on the auxiliary recording medium, and the video and audio signals are read from the auxiliary recording medium. In order to perform / N speed reproduction, a predetermined amount of M video and audio signals are recorded on the auxiliary recording medium during a period having a length of M times the unit time, and the M video and audio signals are recorded. After that, the recorded M video and audio signals are sequentially read out within a period of M × N times the unit period, and at least when a predetermined amount of M video and audio signals have been reproduced by the recording / reproducing means. In the above, under the control of the control means, the recording / reproducing means puts the reproduction of the main recording medium into the reproduction stopped state or the reproduction paused state, and when the video and audio signals are sequentially written,
Under the control of the control means, the recording / reproducing means reproduces the main recording medium at a time point before the time when the main recording medium is reproduced by the recording / reproducing means and video and audio signals are actually obtained. It is a thing.

Further, in the present invention according to each of the above inventions, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed, the normal recording medium is reproduced from the main recording medium. When the video and audio signals obtained by reproducing at the reproduction speed are temporarily recorded in the auxiliary recording medium by the auxiliary recording medium control means and the video and audio signals are read from the auxiliary recording medium, the video and audio signals are recorded at least every N frames. And an audio signal is output.

Further, in the present invention according to each of the above-mentioned inventions, at the time of reading the video and audio signals from the auxiliary recording medium, at least the video and audio signals in N frames are evenly divided by a field unit every two frames or more every N frames. Is output to.

[0045]

According to the recording / reproducing method of the present invention described above, when the input video and audio signals to be recorded are recorded from the editing point of the main recording medium, the input video and audio signals to be recorded are signals for recording. After the processing, the information is once recorded on an auxiliary recording medium having an access speed faster than that of the main recording medium, the main recording medium is reproduced, and the position information on the main recording medium obtained by reproducing the main recording medium is used. Based on this, the timing of reading the input video and audio signals to be recorded from the auxiliary recording medium from the editing point on the auxiliary recording medium was obtained, and the position of the main recording medium became the editing point on the main recording medium. At this time, based on the timing, the input video and audio signals to be recorded are read from the auxiliary recording medium and recorded in the main recording medium. As a result, when the edit point on the main recording medium is detected from the position information recorded on the main recording medium, the input video and audio signals are read from the auxiliary recording medium and read. The input video and audio signals are recorded on the main recording medium.

According to the recording / reproducing method of the present invention described above, when the video and audio signals obtained by reproducing the first device are recorded from the editing point of the main recording medium of the second device,
The video and audio signals obtained by being reproduced by the first device are once recorded on an auxiliary recording medium having an access speed faster than that of the main recording medium of the first device, and then the recorded video and audio signals are read out and read out. Edited points to be recorded on the main recording medium of the second device while outputting the reproduced video and audio signals for the monitor as the reproduced video and audio signals for the monitor and outputting the reproduced video and the audio signals for the monitor. , The address data of the designated video and audio signals on the auxiliary recording medium is held, the main recording medium of the second device is reproduced, and the main recording medium is reproduced. Based on the obtained position information on the main recording medium, the first
Timing of reading out the specified video and audio signals from the edit point on the auxiliary recording medium of the apparatus, the position of the main recording medium of the second apparatus is the edit point on the main recording medium. Then, based on the above timing, the video and audio signals after the video and audio signals designated by the first device are read from the auxiliary recording medium of the first device, and the read video and audio signals are read. After performing the signal processing for reproduction on the signal, the second
Is output to the device for recording and is recorded from the edit point to the main recording medium of the second device. By this, the first
If the editing point is specified while the video and audio signals recorded on the auxiliary recording medium are reproduced, the address data of the auxiliary recording medium at that time is held and the second device is set. When the playback mode is set and the position information obtained from the playback signal becomes the edit point on the recording medium,
Video and audio signals are read from the auxiliary recording medium,
The read video and audio signals are edited and then sequentially recorded on the recording medium of the second device from the edit point.

According to the above-described recording / reproducing method of the present invention, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed, the main recording medium is normally reproduced. At least N frames when the video and audio signals obtained by reproducing at the reproduction speed are temporarily recorded in the auxiliary recording medium having an access speed faster than that of the main recording medium and the video and audio signals are read from the auxiliary recording medium. Video and audio signals are output every minute. As a result, different video and audio signals are output from the video and audio signals intermittently read out from the auxiliary recording medium every N frames, so that a display state visually and audibly equivalent to high-speed reproduction is provided. To form.

Further, according to the recording / reproducing apparatus of the present invention described above, when reproducing from the main recording medium, the read output from the auxiliary recording medium having an access speed faster than that of the main recording medium is apparently reproduced from the main recording medium. And the video and audio signals are recorded directly to the main recording medium, and at the time of recording the video and audio signals to the main recording medium, the video and audio signals apparently input from the auxiliary recording medium are directly input to the main recording medium. To record. As a result, the processing in which the read output from the auxiliary recording medium is actually used is performed only in the device.

According to the recording / reproducing apparatus of the present invention described above, when the input video and audio signals to be recorded are recorded from the editing point of the main recording medium, the recording processing means for the input video and audio signals to be recorded. After the signal processing for recording is performed by the auxiliary recording medium control means under the control of the control means, the video and audio signals subjected to the signal processing for recording by the recording processing means are temporarily transferred from the main recording medium. When recording on an auxiliary recording medium having a high access speed, and when the position of the main recording medium becomes an editing point on the main recording medium, the auxiliary recording medium is recorded on the basis of the timing signal from the timing generating means. The input video and audio signals to be recorded are read by the auxiliary recording medium control means and recorded in the main recording medium. When the position of the main recording medium reaches the editing point, the video and audio signals are read from the auxiliary recording medium by the auxiliary recording medium control means based on the timing generating means, and the read video and audio signals are the main recording medium. It is recorded sequentially from the above edit point.

Further, according to the present invention described above, in the recording / reproducing apparatus, in the timing generating means,
The position information extracting unit extracts position information from the reproduction signal reproduced by the recording / reproducing unit, and the time measuring unit measures time from the time when the position information extracting unit extracts the position information. Of the reproduction time information used for reproducing between the sector in which is recorded and the sector for recording the next video and audio signal, and actually after the video and audio signal is read from the auxiliary recording medium. The signal transmission time information consumed until the recording is started on the main recording medium is held in the holding means, and the control means controls the auxiliary recording medium control means based on the reproduction time information and the signal transmission time information. The time is obtained by the calculating means, and the control timing time information from the calculating means is compared with the measured time information from the time measuring means by the timing generating means. And supplies a timing signal serving as a reference for controlling the auxiliary recording medium relative to the control means when they are the same. As a result, the control timing time information obtained by the calculation means and the measurement time information spent from the reading of the video and audio signals from the auxiliary recording medium to the actual start of recording in the main recording medium obtained by the measuring means. When the coincidence is detected by the timing generation means, the timing generation means outputs a timing signal, and the timing signal causes the auxiliary recording medium to read the video and audio signals.

According to the present invention described above, the auxiliary recording medium control means of the first device reproduces the video and audio signals obtained by the reproduction of the first device, and the auxiliary recording is faster than the main recording medium. After recording once on the medium, the recorded video and audio signals are read out, and the read out video and audio signals are output as reproduction video and audio signals for monitoring through the reproduction processing means to reproduce the video and audio signals for monitoring. When an editing point to be recorded on the main recording medium of the second device is specified while outputting the audio signal,
The address data of the designated video and audio signals on the auxiliary recording medium is held by the control means, the main recording medium of the second device is reproduced by the recording / reproducing means, and the main recording medium is reproduced. Based on the position information on the main recording medium obtained as described above, the timing generating means of the first device determines the timing of reading the designated video and audio signals from the edit point on the auxiliary recording medium of the first device. And when the position of the main recording medium of the second device becomes the edit point on the main recording medium, the control means of the first device controls the timing from the timing generating means of the first device. Based on the signal, the video and audio signals subsequent to the video and audio signals designated by the first device are read from the auxiliary recording medium of the first device, and the read video and audio signals are read. Is output for recording to the second device after being subjected to signal processing for reproduction by the reproduction processing means of the first device, and is recorded on the main recording medium of the second device by the second device. It is recorded from the editing point by the reproducing means. As a result, when an edit point is specified during reproduction of the video and audio signals reproduced by the first device and recorded on the auxiliary recording medium, the address data of the auxiliary recording medium at that time is held, Put the second device in playback mode,
When the position information obtained from the reproduced signal becomes an editing point on the recording medium, the video and audio signals are read from the auxiliary recording medium, and the read video and audio signals are edited. After that, they are sequentially recorded from the edit point on the recording medium of the second device.

Further, according to the present invention described above, in the above-mentioned recording / reproducing apparatus, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed which is 1 / N times the normal reproduction speed, Video and audio signals obtained by reproducing the main recording medium at a normal reproduction speed are temporarily recorded in the auxiliary recording medium by the auxiliary recording medium control means, and the video and audio signals are recorded from the auxiliary recording medium in the auxiliary recording. When read by the medium control means, at least the video and audio signals of the original frame are output N times. As a result, the video and audio signals read from the auxiliary recording medium N times per frame are output as the same video and audio signals N times, so that the display is visually and audibly equivalent to low-speed reproduction. Form a state.

Further, according to the present invention described above, in each of the above inventions, when the video and audio signals are read from the auxiliary recording medium and at least the video signal of the original frame is output N times, the first half frame is the first frame. The video signal of the original field is used for the central frame, and the video signal of the second field is used for the latter half of the latter frame. As a result, the structure on the time axis of N frames is based on the interpolated frame based on the video signal of the first field in the first half, the video signal of the original frame in the next half, and the video signal of the second field in the second half. The interpolated frame has a less changeable structure, and a so-called smooth display state with little change is visually formed.

Further, according to the present invention described above, in each of the above inventions, the video and audio signals obtained by reproducing from the main recording medium are recorded on the auxiliary recording medium, and the video and audio signals are recorded from the auxiliary recording medium. When performing 1 / N speed reproduction, the auxiliary recording medium control means records a predetermined amount of M video and audio signals on the auxiliary recording medium in a period having a length of M times the unit period. Then, after recording the M video and audio signals, the M video and audio signals recorded in the period are sequentially read from the auxiliary recording medium within a period of M × N times the unit period. by this,
A predetermined amount of M video and audio signals recorded in the auxiliary recording medium in a period having a length of M times the unit period are sequentially read N times each in a period of M × N times the unit period,
The video and audio signals read from the auxiliary recording medium N times each frame output the same video and audio signals N times each, so that a visually and audibly equivalent display state to low-speed reproduction is formed. To do.

According to the present invention described above, in each of the above inventions, the video and audio signals obtained by reproducing from the main recording medium are recorded in the auxiliary recording medium, and the video and audio signals are recorded from the auxiliary recording medium. Is read out and 1 / N speed reproduction is performed, a predetermined amount of M video and audio signals are recorded in the auxiliary recording medium in a period having a length of M times the unit period, and the M video and audio signals are recorded. After recording the signals, the M video and audio signals are sequentially read out within a period of M × N times the unit period, and the reproduction of at least a predetermined amount of M video and audio signals is completed by the recording / reproducing means. At this point, under the control of the control means, the recording / reproducing means puts the reproduction of the main recording medium into the reproduction stopped state or the reproduction paused state, and when the video and audio signals are written next,
Under the control of the control means, the recording / reproducing means reproduces the main recording medium at a time point before the time when the main recording medium is reproduced by the recording / reproducing means and video and audio signals are actually obtained. . As a result, a predetermined amount of M video and audio signals recorded on the auxiliary recording medium in a period having a length M times as long as the unit period is M × N times the unit period.
The video and audio signals sequentially read within the N times period and read N times from the auxiliary recording medium N times per frame, the same video and audio signals are output N times. In addition to forming a display state equivalent to low speed reproduction, preparation for the next process is performed.

According to the present invention described above, in each of the above inventions, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed, the main recording is performed. When the video and audio signals reproduced from the medium at a normal reproduction speed are temporarily recorded in the auxiliary recording medium by the auxiliary recording medium control means and the video and audio signals are read from the auxiliary recording medium, at least N frames are recorded. Video and audio signals are output every minute. by this,
The video and audio signals intermittently read out from the auxiliary recording medium every N frames output different video and audio signals, and thus visually and audibly form a display state equivalent to high-speed reproduction. .

Further, according to the present invention described above, in each of the above inventions, when the video and audio signals are read from the auxiliary recording medium, at least the video and audio signals in N frames are evenly divided by a field unit for two frames or more. Output every N frames. As a result, the N
The video and audio signals that are evenly read out in units of two frames or more for each frame are output as video and audio signals of different frames, and are visually and auditorily equivalent to high-speed reproduction. Form a smooth display state.

[0058]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the recording / reproducing method and apparatus of the present invention will be described in detail below with reference to FIGS.

In the description of one embodiment of the recording / reproducing method of the present invention and the apparatus therefor, the following item explanation will be described at the head of each item, and each item will be explained in the following order.

A. B. Structure and operation of digital VTR to which the recording / reproducing method and apparatus of the present invention are applied (see FIG. 1) B. Example of internal configuration of input / output circuit 8 shown in FIG. 1 and description of operation thereof (see FIG. 2) Internal structure of track information detection circuit 16 shown in FIG. 1 and description of operation thereof (see FIG. 3) D. Explanation of tape format of digital VTR shown in FIG. 1 (see FIG. 4) Operation explanation of the digital VTR shown in FIG. 1 and the track information detection circuit shown in FIG. 2 (see FIG. 5) F. Description of operation during recording of the digital VTR shown in FIG. 1 (see FIG. 6) G. Description of operation during normal speed reproduction of the digital VTR shown in FIG. 1 (see FIG. 7) Operation explanation at the time of 1/5 speed reproduction of the digital VTR shown in FIG. 1 (see FIG. 8) Operation explanation at the time of reproduction at 9 times speed of the digital VTR shown in FIG. 1 (see FIG. 9) Description of output operation at 9 × speed reproduction of the digital VTR shown in FIG. 1 (see FIG. 11) K. Description of the access method of the editing point when editing is performed using the digital VTR shown in FIG. 1 (see FIG. 10) * Second embodiment * Third embodiment * Fourth embodiment * Fifth embodiment

[First Embodiment]

[Outline of First Embodiment] As shown in FIGS. 1 to 3, a configuration is adopted in which video and audio data is input and output through the memory 8d of the input / output circuit 8 during recording and reproduction. At the same time, in the case of the insert, the edit point on the magnetic tape is recognized by the reference sector, and at the time when the input video and audio signals are designated by the key, the corresponding video and audio data is read from the memory 8d, In the case of 1 / N speed reproduction, several hundreds of frames of video and audio data are first recorded from the editing point of the memory 8d.
, Stop the tape transport 11 once,
Video and audio data are read from the memory 8d, and then the tape transport 11 is put into a reproducing state and the reproduced video and audio data is written to the data read area of the memory 8d, and the tape transport 11 is intermittently operated. While reproducing and writing the reproduced video and audio data in the memory 8d intermittently, 1 / N speed reproduction using the memory 8d is realized by making it possible to read continuously, and in the case of N speed reproduction, The range on the magnetic tape is designated in advance, the reproduced video and audio data for the designated period is temporarily written in the memory 8d while thinning out according to the reproduction speed, and the video and audio data written in the memory 8d is read.

A. Description of the structure and operation of a digital VTR to which the recording / reproducing method and apparatus of the present invention are applied (see FIG. 1)

FIG. 1 is a block diagram showing an example of a digital VTR to which the recording / reproducing method and apparatus of the present invention are applied.

[Connection and Configuration] In FIG. 1, reference numeral 1 is an input terminal to which an analog video signal to be recorded is supplied, and 2 is an analog video signal to be recorded supplied via the input terminal 1 and converted into digital video data. An A / D converter, 3 is a frame memory for storing the digital video data from the A / D converter 2, and 4 is a compression coding circuit for compressing and coding the digital video data read from the frame memory 3.

Reference numeral 5 is an input terminal to which an analog audio signal to be recorded is supplied, 6 is an AD converter for converting the analog audio signal to be recorded supplied via the input terminal 6 into digital audio data, 7 Is an error correction code addition circuit for adding an error correction code to the compressed digital data from the compression encoding circuit 4 and the digital audio data from the AD converter 6, respectively.

Here, in the compression coding circuit 4, for example, DCT (discrete cosine transform), ADRC (adaptive dynamic range coding),
Wavelet conversion and variable length coding processing such as Huffman and run length processing are performed. The error correction code adding circuit 7 adds inner parity to the compressed digital data and digital audio data, respectively, and then adds outer parity to the compressed digital data and digital audio data to which the inner parity is added. Is added.

Digital data to which an error correction code such as inner parity or outer parity is added is supplied to the input / output circuit 8 having a memory. The input / output circuit 8 writes the input digital data in the internal memory according to the write / read control signal supplied from the memory controller 19 based on the control signal from the system controller 17, and outputs the digital data written in the internal memory. read out. The read data is supplied to the channel coding circuit 9, is digitally modulated in the channel coding circuit 9, and is then supplied to the magnetic head (not shown) of the tape transport 11 via the recording / amplifying circuit 10. The magnetic tape (not shown) of the video tape cassette set at 11 is recorded so as to form inclined tracks.

Here, the tape transport 11
Is a mechanism for capturing video tape cassettes,
A drive unit including a motor for driving this mechanism, a mechanism for pulling out a magnetic tape from a taken-in video tape cassette and winding the magnetic tape around the rotating drum, a drive unit including a motor for driving this mechanism, for example, two or more. It is composed of a rotary drum on which a magnetic head is mounted and a drive unit including a motor for driving the rotary drum. In this example, one frame is composed of 10 tracks, and the recording method is the digital component recording method.

Reference numeral 12 is a reproduction / amplification circuit, which reproduces the reproduced digital data when the digital data recorded on the magnetic tape of the video tape cassette set in the tape transport 11 is reproduced by the magnetic head. It is amplified and supplied to the synchronization detection / data extraction circuit 13. The synchronization detection / data extraction circuit 13 reproduces a clock from the reproduced digital data, extracts the digital data by the clock, and outputs the synchronization signal SYN.
Detect C. The extracted digital data is supplied to the channel decoding circuit 14, and the detected synchronization signal SYNC is supplied to the system controller 17 and the clock generation circuit 21, respectively. The channel decoding circuit 14 demodulates the digital data from the sync detection / data extraction circuit 13.

The output of the channel decoding circuit 14 is supplied to the input / output circuit 8 and the track information detection circuit 16, respectively. The track information detection circuit 16, which will be described in detail later with reference to FIG. 3, obtains track information such as reference sector information from the channel decoding circuit 14,
Based on this track information, the system controller 17
Outputs a timing signal indicating the timing for outputting the control signal.

The system controller 17 uses the input terminal 1
When processing is performed using the input video and audio signals supplied via 5 and 5, to the memory controller 19 based on the reference clock signal from the clock generating circuit 21 and the timing signal from the track information detecting circuit 16. When performing control and processing by external synchronization, the memory controller 19 is controlled based on the reference clock signal from the clock generation circuit 21 and the reference signal (for example, genlock signal) supplied through the input terminal 18. When the tape transport 11 is reproduced and the reproduced video and audio data is used for processing, the reference clock signal from the reference clock generation circuit 21 and the synchronization signal SYNC from the synchronization detection / data extraction circuit 13 are used. The memory controller 19 is controlled based on the above, and simply stored in the memory 8d. Performing control for the memory controller 19 based on the internal clock from the clock generation circuit 21 when processing the image and audio data. However, the tape transport 11 is controlled using the internal reference clock generated by the clock oscillator 17a.

Further, this system controller 17
Based on the operation information from the user interface 20,
Performs various controls. In addition, this system controller 17
Holds the operation time data from when the instruction is given to when the tape transport 11 is actually operated, when the tape transport 11 is given an instruction to the internal memory. This operation time data is taken into consideration in the control of 19 and the control of the tape transport 11.

Further, the system controller 17 is
When the reproduction speed is slower than the normal reproduction speed, such as ⅕ times speed reproduction, the frame memory 24 is controlled to write and read to convert the frame data into frame data (interpolation). )I do. As the interpolation method, interpolation for obtaining frame data based on the data of the ODD field and interpolation for obtaining frame data based on the data of the EVEN field are appropriately used. This technique is already well known. Of course, an interpolation circuit may be separately provided and the interpolation processing may be performed in parallel with the control of the system controller 17.

Further, the system controller 17 is
Another VTR is controlled via the input / output terminal 15.

Here, the user interface 20 is
As shown in the figure, a display 20a, a jog dial 20j for frame-by-frame playback, a shuttle key 20s for playback at a playback speed based on a rotation angle, and various operation key groups 2
It consists of 0k. Further, various information such as a time code is displayed on the display 20a. Further, the operation key group 20k, for example, a numerical key such as a numeric keypad, a reproduction key, a recording key, a pause key, a stop key, a key for designating an in point and an out point, an insert key, a winding key. It has keys for returning and fast-forwarding.

When performing processing using the input video and audio signals supplied through the input terminals 1 and 5, the clock generation circuit 21 extracts from the video signal supplied through the input terminal 1. When a clock signal is generated based on the vertical synchronizing signal and processing is performed using the reproduced video and audio data obtained by reproducing by the tape transport 11, the synchronizing signal SY from the synchronization detecting / data extracting circuit 13
When a clock signal is generated based on NC and processing is performed using the reference signal supplied via the input terminal 18,
A clock signal is generated based on the reference signal supplied via the input terminal 18.

The digital reproduction data once stored in the input / output circuit 8 is supplied to the error correction processing circuit 22. The error correction processing circuit 22 performs error correction on the digital data supplied from the input / output circuit 8 by using the inner parity and the outer parity, and further performs error correction on the data that cannot be corrected by the outer parity. Make modifications. Further, this error correction processing circuit 22
Supplies the ID data described later to the system controller 17.

Of the outputs of this error correction processing circuit 22,
The compressed digital video data is supplied to the compression / decoding circuit 23, the digital audio data is supplied to the DA converter 27, which is converted into an analog audio signal in the DA converter 27 and then output from the output terminal 28.
It is supplied to a speaker via an amplifier (not shown) or the like, and is output as sound from the speaker.

The compression / decoding circuit 23 performs processing on the compressed digital video data from the error correction processing circuit 22, which is the reverse of the processing in the compression / encoding circuit 4, whereby
Obtain the original digital video data. The digital video data is once stored in the frame memory 24, read out, converted into an analog video signal in the DA converter 25, and then output from the output terminal 26 to be displayed as an image on a television monitor (not shown). It

B. An example of the internal configuration of the input / output circuit 8 shown in FIG. 1 and its operation description (see FIG. 2)

FIG. 2 is a block diagram showing an internal configuration example of the input / output circuit 8 shown in FIG.

[Connection and Configuration] In the figure, 8a is shown in FIG.
The input terminal to which the digital data to which the error correction code is added from the error correction code adding circuit 7 shown in FIG. 1 is supplied, and the demodulated digital data from the channel decoding circuit 14 shown in FIG. 1 is supplied to 8b. An input terminal, 8g is an input terminal for supplying the read digital data to the channel coding circuit 9 shown in FIG. 1, and 8h is an error correction processing circuit 22 shown in FIG.
It is an input terminal for supplying the digital data read out to.

The input terminal 8a is connected to one fixed contact a of the switch 8c, the input terminal 8b is connected to the other fixed contact b of the switch 8c, and the movable contact c of the switch 8c is connected to the data input terminal of the memory 8d. Then, the data output terminal of the memory 8d is connected to the movable contact c of the switch 8f, one fixed contact a of this switch 8f is connected to the input terminal of the channel coding circuit 9 shown in FIG. 1, and the other of this switch 8f is connected. 1 is connected to the input terminal of the error correction processing circuit 22 shown in FIG.

Further, in1 is an input terminal to which the switching control signal from the memory controller 19 shown in FIG. 1 is supplied, and in2 is the memory controller 19 shown in FIG.
Input terminal to which the write side address signal from
in3 is an input terminal to which a write control signal is supplied from the memory controller 19 shown in FIG. 1, in4 is an input terminal to which a read side address signal is supplied from the memory controller 19 shown in FIG. 1, and in5 is an input terminal shown in FIG. 1 is an input terminal to which the read control signal from the memory controller 19 is supplied, and in6 is an input terminal to which the switching control signal from the memory controller 19 shown in FIG. 1 is supplied.

Here, the memory 8d is a FIFO (first in first
Out) Memory configuration. When the FIFO is constructed by software, it is not necessary to use the input / output circuit 8 shown in FIG. In this case, the RAM in the system controller can be made to have a large capacity, and the CPU or the DMA controller can operate as a FIFO.

[Operation] The operation during normal recording (when recording the input video and audio signals) is as follows. When the control signal indicating the normal recording is supplied from the system controller 17, the memory controller 19 supplies the switching control signal to the input / output circuit 8. By this switching control signal, the movable contact c of the switch 8c becomes the fixed contact a.
The movable contact c of the switch 8f is connected to the fixed contact a.

Thereafter, the digital data from the error correction code adding circuit 7 is sent by the write side address signal supplied from the memory controller 19 through the input terminal in2 and the write control signal supplied through the input terminal in3. The data is sequentially written in the memory 8d. The read side address signal supplied from the memory controller 19 through the input terminal in4 and the input terminal i
The digital data written in the memory 8d is read by the read control signal supplied via n5. At this time, it goes without saying that the memory controller 19 shifts the timing so that the read side address does not match the write side address.

The digital data read from the memory 8d is supplied to the magnetic head of the tape transport 11 via the channel coding circuit 9 and the recording / amplifying circuit 10, and the video tape set in the tape transport 11 is supplied. It is recorded to form tilted tracks on the magnetic tape of the cassette.

The operation during normal reproduction (when reproducing video and audio data recorded on the magnetic tape) is as follows. When the control signal indicating the normal reproduction is supplied from the system controller 17, the memory controller 19 supplies the switching control signal to the input / output circuit 8 based on the reproduction synchronization signal supplied from the synchronization detection / data extraction circuit 13. To do. By this switching control signal, the movable contact c of the switch 8c is connected to the fixed contact b, and the switch 8c
The movable contact c of f is connected to the fixed contact b.

Thereafter, the digital data from the channel decoding circuit 14 is sequentially processed by the write side address signal supplied from the memory controller 19 through the input terminal in2 and the write control signal supplied through the input terminal in3. It is written in the memory 8d. Then, from the memory controller 19 to the input terminal in4
The digital data written in the memory 8d is read by the read side address signal supplied via the input terminal and the read control signal supplied via the input terminal in5.

The digital data read from the memory 8d is supplied to the error correction processing circuit 22 and subjected to error correction processing and the like, and then output separately for video and audio, and as described above, from the output terminal 26. It is output as an analog video signal and is output from the output terminal 28 as an analog audio signal.

Input video and audio signals to the video tape set in the tape transport 11.
A case of sequentially recording from a predetermined position on the magnetic tape of the cassette will be described. As a condition, the edit point IP on the magnetic tape of the video tape cassette set in the tape transport 11 is designated in advance,
When the user specifies an edit point on the input video and audio signals while monitoring the input video and audio signals, the digital data (video and audio data after error correction code addition processing) after the input video and audio signals is specified. Based on the sync signal from the sync detection / data extraction circuit 13, the data is read from the memory 8d, and when the position of the magnetic tape of the video tape cassette set in the tape transport 11 becomes the editing point, the data is read from the memory 8d. The condition is that the read digital data reaches the magnetic head. The operation is as follows.

When the control signal indicating the normal reproduction is supplied from the system controller 17, the memory controller 19 supplies the switching control signal to the input / output circuit 8. With this switching control signal, the movable contact c of the switch 8c is connected to the fixed contact a, and the movable contact c of the switch 8f is connected to the fixed contact b. As a result, after the input video and audio signals are once written in the memory 8d, read from the memory 8d and processed by the error correction processing circuit 22, the digital video data is compressed and decoded by the compression decoding circuit 23 and the frame memory. 24, after passing through the D-A converter 25, output terminal 2 as an analog video signal
The digital audio data output from No. 7 is passed through the D-A converter 27 and then output from the output terminal 28 as an analog audio signal, so that the video and audio can be monitored. During this period, the tape transport 11 is in the reproduction state under the control of the system controller 17 (preroll period).

While the user monitors video and audio, the operation key group 2 of the user interface 20 shown in FIG.
When the key for designating the edit point of 0k is pressed, the system controller 17 notifies the memory controller 19 to that effect, whereby the memory controller 1
9 can recognize the address of the edit point in the input video and audio signals designated by the user.

After that, when the track information detection circuit 16 obtains the reference sector information, a timing signal is generated by the above-mentioned processing, and this timing signal is supplied to the system controller 17. System controller 17
Supplies a control signal for starting the reading to the memory controller 19 according to the timing signal from the track information detection circuit 16. Further, the system controller 19 supplies a control signal to the tape transport 11 so that the audio sector in the recording track as the edit point on the magnetic tape of the video tape cassette set in the tape transport 11 is magnetically recorded. When the head plunges, the tape transport 11 is set to the recording state.

In response to the control signal from the system controller 17, the memory controller 19 supplies the address of the editing point (read side address) to the memory 8d through the input terminal in4, and the read control signal through the input terminal in5. Supply to 8d. by this,
The digital data written in the memory 8d is read from the position corresponding to the edit point.

The digital data read from the memory 8d is supplied to the magnetic head of the tape transport 11 via the channel coding circuit 9 and the recording / amplifying circuit 10, and at the same time, the magnetic head causes the audio of the recording track as an editing point. Start scanning the sector. As a result, a recording track as an edit point on the magnetic tape of the video tape cassette set in the tape transport 11 (except the reference sector is not recorded)
It is possible to sequentially record the input video and audio signals from.

When the reproduction speed is slower than the normal reproduction speed, such as 1/5 times speed reproduction, the memory controller 19 controls the writing and reading, and the video and audio data for several hundreds of frames are initially recorded. It is written in the memory 8d. The memory controller 19 reads out the video and audio data written in the memory 8d, and stores the video and audio data that has been read out when it becomes, for example, half of the data of several hundred frames initially written. Write the following video and audio data in the area.

In order to make the explanation here easier to understand, the data of the first several hundreds of frames is converted into the data A of several hundreds of frames which is ½ of the data of several hundreds of frames.
1 and the remaining half, that is, data B1 for several hundreds of frames, area A for writing data A for hundreds of frames, and area b for writing data B for several hundreds of frames. Will be described again.

Initially, the data A1 and B1 for several hundreds of frames are both written in the areas a and b of the memory 8d, respectively. Thereafter, in the first period, data A1 of several hundreds of frames is read from the area a, and subsequently, in the next period, reading of data B1 of several hundreds of frames from the area b is started, and at the same time, the tape transport 11 is started. The next several hundreds of frames of data A2 are reproduced, the several hundreds of frames of data A2 are written in the area a of the memory 8d, and in the next period, several hundreds of frames of data A2 are read from the area a. At the same time, the next several hundreds of frames of data B2 are reproduced from the tape transport 11, the several hundreds of frames of data B2 are written in the area b of the memory 8d, and so on. Writing and reading are performed for one area.

The tape transport 11 is set to the reproduction state only when reproducing data A or B for several hundreds of frames.
When the reproduction of several hundred frames A or B is completed in one period, the reproduction is stopped or the reproduction is suspended until the next period. When writing to or reading from the memory 8d, if the tape transport 11 is in the reproduction state or the reproduction paused state, the synchronization signal from the synchronization detection / data extraction circuit 13 shown in FIG. In this case, the reference clock signal from the clock generator 17a shown in FIG. 1 is used as the reference signal.

The system controller 17 stores the tape transport 11 in the above-mentioned memory or the like so that the tape transport 11 can be reproduced from the stopped state at the beginning of each period (at the time when the reading of each period is completed). The playback operation start command is output before the next period by the time indicated by the operation time data for starting up the tape transport 11.

When the reproduction is started from the reproduction paused state, the final data (data of one recording track) to be written in the memory 8d is continuously supplied during the reproduction paused state. Therefore, writing may be prohibited for the memory controller 19 at the stage when the last writing of the period is completed.

C. Track information detection circuit 1 shown in FIG.
6 internal configuration and operation description (see FIG. 3)

FIG. 3 is a configuration diagram showing an internal configuration example of the track information detection circuit 16 shown in FIG.

[Connection and Configuration] In the figure, 16a is an input terminal to which reproduced digital data supplied from the channel coding circuit 14 shown in FIG.
Reference numeral b is a track information extracting circuit for extracting track information such as the above-mentioned reference sector information from the reproduced digital data supplied through the input terminal 16a, and 16c is a timer when the reference sector information is supplied from the track information extracting circuit 16b. An arithmetic circuit 16f that causes 16e to start time measurement, and subtracts data indicating the time until the recording signal reaches the tape transport 11 from the data indicating the time from the reference sector to the audio sector read from the ROM 16d. Is a timing generation circuit that compares the data indicating the measurement time from the timer 16e with the data as the calculation result from the calculation circuit 16c, and generates a timing signal when these are the same. The generated timing signal is output Through 16g is supplied to the system controller 17 shown in FIG.

Here, the arithmetic circuit 16c stores data indicating the time from the reference sector to the audio sector and data indicating the time until the recording signal reaches the tape transport. Also, the timer 16
e is the input terminal 1 from the clock generation circuit 21 shown in FIG.
The time is measured by counting the clock signals supplied via 6h.

D. Description of the tape format of the digital VTR shown in FIG. 1 (see FIG. 4)

FIG. 4 is an explanatory diagram showing an example of the tape format of the digital VTR shown in FIG.

In this example, in the figure, Tn and T
n + 1 is a recording track formed on the magnetic tape Tp, SS is a subcode sector, VS is a video sector, and A is a video sector.
S is an audio sector, and RS is a reference sector serving as a reference for tracking. Further, IDa indicates the ID data recorded in the hatched area in each of these sectors. The ID data is, for example, a time code (hour, minute, second,
In addition to the data indicating the order of the frame, the known additional information is recorded. By1 indicates the traveling direction of the magnetic tape Tp, and by2 indicates the scanning direction of the magnetic head.

Here, the reference sector information is recorded in the reference sector RS, and the reference sector information means the track information detection circuit 16 with respect to the reference sector RS when the magnetic head finishes scanning the reference sector RS. This is data indicating that the scanning of the magnetic head is completed. For example, "1" from the entrance to the exit of the reference sector RS
Alternatively, one method is to record "0" and record "0" or "1" at the exit portion of the reference sector RS.

In addition, at t, the magnetic head is the reference sector RS.
From one end (corresponding to the outlet of the magnetic head) to one end of the audio sector (corresponding to the protrusion of the magnetic head)
It is time to reach.

E. Description of operation of the digital VTR shown in FIG. 1 and the track information detection circuit shown in FIG. 3 (see FIG. 5)

FIG. 5 is a flow chart for explaining the operation of the track information detection circuit 16 shown in FIG.

In step S1, track information is acquired. That is, the track information extracting circuit 16 shown in FIG.
b is the channel decoding circuit 14 shown in FIG.
The reference sector information as the track information is extracted from the digital data from. Then, the process proceeds to step S2.

In step S2, it is determined whether or not the data has been acquired. If "YES", the process proceeds to step S3. This is confirmation of completion of acquisition of track information.

In step S3, timer measurement is started. That is, when the track information is supplied from the track information extracting circuit 16b, the timer 16d shown in FIG. 2 starts measuring the time from that point. Then, the process proceeds to step S4.

In step S4, the time required for the recording signal to reach the tape transport is subtracted from the time from the reference sector to the audio sector. That is, the arithmetic circuit 16c shown in FIG.
The above calculation is performed when the track information is supplied from 6b. The time from the reference sector to the audio sector is t described with reference to FIG. 4, and both this time t and the time until the recording signal reaches the tape transport 11 are stored in the ROM 16d in advance. Read and subtract. Then, the process proceeds to step S5.

In step S5, the time measured by the timer is compared with the calculation result. Then, the process proceeds to step S6.

In step S6, it is determined whether the measurement time is equal to the calculation result. That is, the timer 1 shown in FIG.
6e determines whether or not the measured time data and the value indicated by the data as the calculation result supplied from the calculation circuit 16c are equal, and when they are equal, the timing generation circuit 16f is measured. The timing generation circuit 16f is supplied with data indicating that the value indicated by the time data and the value indicated by the calculation result data supplied from the calculation circuit 16c are equal. Then, the process proceeds to step S7.

At step S7, a timing signal is generated. That is, the timing generation circuit 16f shown in FIG.
However, the system controller 17 shown in FIG. 1 generates a timing signal for obtaining the timing for supplying the write / read control signal to the memory controller 19. The timing signal generated by the timing generation circuit 16f is supplied to the system controller 17. When the above processing is completed, this routine ends.

F. Description of operation during recording of the digital VTR shown in FIG. 1 (see FIG. 6)

FIG. 6 is an explanatory diagram for explaining the operation of the digital VTR shown in FIG. 1 during recording. In the following description, for convenience of description, the input terminal 1 and the input terminal 5 shown in FIG. 1 are respectively a video signal output terminal and an audio signal output terminal of an analog VTR (a hard disk disk drive or the like is also possible). A video tape that is connected and that specifies edit points in the input video and audio data by the edit point specification method described below, and sequentially sets the input video and audio data after the edit points to the tape transport 11. The case of sequentially recording from the edit point IP on the magnetic tape of the cassette will be described. In this case, a television monitor is connected to the output terminal 26 shown in FIG. 1, and a speaker is connected to the output terminal 28 via an amplifier.

The method of designating the edit point is as follows. An instruction to reproduce the tape transport 11 is given to the system controller 17 via the user interface 20, and thereafter, the tape transport 11 is set to the reproduction state under the control of the system controller 17, and the reproduced video and audio signals to be input are input. The data is once stored in the memory 8b of the input / output circuit 8 and then read out and supplied to the television monitor and the speaker via the output terminals 26 and 28, respectively, and monitored by the television monitor and the speaker. When the designation key of the user interface 20 is pressed, an edit point is designated to the system controller 17, and at this time, the system controller 17 accesses the video and audio data corresponding to the edit point from the memory 8d of the input / output circuit 8. To do so.

When recording video and audio data on a magnetic tape on which recording tracks are already formed, the audio sector AS, the video sector VS, and the sub-code sector SS are also recorded. It is assumed that the original reference sector is used without recording on the reference sector RS shown in FIG.

Further, the edit point IP on the magnetic tape of the video tape cassette set in the tape transport 11 is to reproduce the analog VTR, monitor the reproduced video and audio, and set the edit point IP as the edit point IP. By pressing a predetermined key on the operation panel of the user interface 20 and supplying the time code at that time to the system controller 17 via the input / output terminal 15, it may be designated.

In the figure, Din is set to the input digital data from the error correction code adding circuit 7 input to the memory 8 shown in FIG. 1, Min is set to the data stored in the memory 8, and Tape is set to the tape transport. Showing the magnetic tapes of the respective video tape cassettes.
Further, the broken line arrow attached to the input digital data Din indicates the lapsed time direction, and the stored data Mi.
The solid arrow attached to the right side of n indicates the reading direction, the dashed arrow inside the stored data Min indicates the writing direction, and the arrow indicated as IP on the Tape indicates the edit point (in point). Show.

The input digital data Din,
One block of the storage data Min and the magnetic tape Tape represents one data, and the input digital data Di
n, the storage data Min, and the numbers attached to the magnetic tape Tape respectively indicate the input order for each frame,
For example, in the input digital data Din, the data to which the numeral “1” is attached indicates that it is the data supplied first among the data to which the numeral is attached, and the first data is the memory 8 Memorized in. This data is data to which the number "1" is added in the stored data Min. Then, of the stored data Min, the data to which the numeral “1” is added is recorded on the magnetic tape Tape. This data is magnetic tape T
This is data to which the number "1" is added in the ape.

The area indicated by the dot in the input digital data Din corresponds to the area indicated by the dot in the storage data Min, and the hatched portion in the magnetic tape Tape has already been recorded with other data before recording. Indicates that

That is, in this example, the video and audio signals input from the outside are converted into digital video and audio data, and then sequentially written in the memory 8d.
The video and audio data written in d are sequentially read, and the video and audio data read from the memory 8d are processed by the error correction processing circuit 22, the compression / decoding circuit 23, the frame memory 24, and the DA converters 25 and 27, and then the television. It is supplied to a speaker via a television monitor and an amplifier so that the user can visually observe the image displayed on the television monitor, and the user can listen to and monitor the sound output from the speaker. When the user designates the recording start point via the interface 20, when the system controller 17 recognizes that the edit point IP is the output point of the tape transport 11, the edit point is used as the edit point of the input video and audio data. When reading the specified video and audio data from the memory 8d, When the track information detection circuit 16 detects the reference sector information of the reference sector RS in the reproduction data supplied from the port 11, the system controller 17 causes the memory controller 19 to operate at the timing obtained by the above-described arithmetic processing and the like. By controlling, a case where recording is performed by overlapping the remaining sectors except the reference sector RS of the recording track designated as the edit point IP on the magnetic tape of the video tape cassette set in the tape transport 11 will be described. To explain.

When the user operates the user interface 20 shown in FIG. 1 to bring the analog VTR into the reproducing state and the tape transport 11 into the reproducing state, the digital data from the error correction code adding circuit 7 is obtained. The memory controller 19 is supplied to the memory 8d.
Memory 8d according to the write / read control signal from
The stored digital data is read out and supplied to the error correction processing circuit 22. As shown in FIG. 6, the input digital data Din is sequentially written in the memory 8 and held as the storage data Min.

The digital video data is subjected to error correction processing and error correction processing in the error correction processing circuit 22, and then the compression / decoding circuit 23 and the frame memory 2 are processed.
4, is supplied to the television monitor through the D-A converter 25 and the output terminal 26, and is displayed as an image on the tube surface.

On the other hand, the digital audio data output from the error correction processing circuit 22 is supplied to the speaker via the DA converter 27, the output terminal 28 and an amplifier (not shown), and is output from the speaker as audio.

When the user presses the edit point designating key of the user interface 20 in this state, the system controller 17 supplies the memory controller 19 with a control signal indicating the timing when the key is pressed. The memory controller 19 stores the addresses of the digital video data and the digital audio data on the memory 8d corresponding to the video displayed on the television monitor and the audio output from the speaker at that time, which are not shown in the memory controller 19. Set to the section (register or memory).

Subsequently, the system controller 17 recognizes the recording track before the editing point by the time code supplied from the error correction processing circuit 22, and obtains it from the track information detection circuit 16 by the processing described with reference to FIG. When the timing signal is supplied, the memory controller 19 is instructed to start reading for recording.

In response to an instruction from the system controller 17, the memory controller 19 supplies the address data stored in the storage section (not shown) to the memory 8d together with the read control signal. As a result, the storage data Min held in the memory 8d shown in FIG. 6 are sequentially read from the data with the number “1” added, and the channel coding circuit 9 and the recording amplification circuit 10 shown in FIG. 6 is supplied to the magnetic head of the tape transport 11 via the recording medium, and as shown in FIG. 6, recording corresponding to the position of the edit point IP on the magnetic tape Tape of the video tape cassette set in the tape transport 11. Recording is sequentially performed from the audio sector AV of the track.

What is important here is that no phase adjustment is performed between the tape transport 11 and the input side by electrical and mechanical control. As can be seen from the above description, the tape transport 11 is merely reproducing up to the edit point IP, and is read from the memory 8d just when the magnetic head plunges into the audio sector AS of the edit point IP. The stored data Min is supplied to the magnetic head. That is, desired data can be surely recorded from the edit point IP only by performing electrical processing.

G. Description of operation at normal speed reproduction of the digital VTR shown in FIG. 1 (see FIG. 7)

FIG. 7 is an explanatory diagram for explaining the operation during reproduction of the digital VTR shown in FIG. In the following description, for convenience of explanation, the output terminals 26 and 28 shown in FIG. 1 are the digital VTRs shown in FIG.
A video tape set to the tape transport 11 and connected to the video signal input terminal and the audio signal input terminal of a recording digital VTR (a hard disk disk drive or the like is also possible) having the same configuration as A video tape that is reproduced from a desired frame (recording track of the desired frame) of the magnetic tape of the cassette, supplies the reproduced video and audio data to the recording side digital VTR, and is set in the recording side digital VTR.
The case of sequentially recording from the edit point IP on the magnetic tape of the cassette will be described. Also, the recording side digital VTR
It is assumed that a television monitor for monitoring input video and audio signals, an amplifier and a speaker are connected to.

In the figure, parts corresponding to those in FIG. 6 are designated by the same reference numerals, and detailed description thereof will be omitted. In FIG. 7, Tape indicates the magnetic tape of the video tape cassette set in the tape transport 11 shown in FIG. 1, and the dashed arrow attached to this magnetic tape Tape indicates the time lapse direction. And Dout represents the analog video and audio signals output from the output terminals 25 and 27, respectively.
The dashed arrow attached to t indicates the time lapse direction,
OP indicates the current output.

In this case, first, the user operates a predetermined key on the operation panel of the user interface 20 to access the access point (access of the access point on the magnetic tape of the reproducing side digital VTR by the same method as the above-mentioned edit point designating method. It is necessary to determine the storage data Min of the memory 8d) and the edit point IP on the magnetic tape of the recording side VTR. To determine the access point, a rough access point is determined in advance by the above-mentioned edit point designating method or a method of simply stopping the tape transport 11 at the point where the access point is desired, and then the system controller 17 automatically determines the access point. It is assumed that the tape transport 11 is controlled to a position of several frames or hundreds of frames from the access point, and then the system controller 17 puts the tape transport 11 into a reproducing state.

What is important here is that the first access to the magnetic tape Tape of the video tape cassette set in the tape transport 11 is roughly good. Therefore, for example, the user may operate the user interface 20 to put the tape transport 11 into a reproducing state, monitor the reproduced video and audio, and stop the tape transport 11 at the point where the user wants to set the access point.

The timing of reading the data from the memory 8d is based on the synchronization signal (for example, vertical synchronization signal) supplied from the recording side digital VTR via the input terminal 18, and the system controller 17 causes the memory controller 19 to operate. It shall be done by giving instructions.

Now, the system controller 17 supplies a control signal to the tape transport 11 so that the position of the magnetic tape of the video tape cassette set in the tape transport 11 is roughly determined. The position is returned by rewinding for several frames or hundreds of frames from the point, and then the tape transport 11 is put into a reproducing state.

When the tape transport 11 enters the reproducing state, as shown in FIG. 7, the data recorded on the magnetic tape Tape is sequentially reproduced, and this reproduced data is sequentially stored in the memory 8d via the channel decoding circuit 14. To be done. As shown in FIG. 7, the data reproduced from the magnetic tape Tape is sequentially written in the memory 8d as the storage data Min. The signals used as the reference at the time of writing are the synchronizing signal supplied from the recording side digital VTR via the input terminal 18 and the clock signal from the clock generating circuit 21.

On the other hand, the system controller 17 sends the read data from the memory 8d to the recording side digital VTR.
The memory controller 19 is controlled on the basis of a synchronizing signal (reproduction vertical synchronizing signal) supplied from the input terminal 18 via the input terminal 18. The memory controller 19 supplies the address signal and the read control signal to the memory 8d based on the timing control of the system controller 17, and reads the data stored in the memory 8d.

The data read from the memory 8d is subjected to error correction processing in the error correction processing circuit 22. The video data after error correction is stored in the frame memory 24 after being decoded by the compression / decoding circuit 23.
After that, after being read from the frame memory 24, DA
The converter 25 supplies the converted analog video signal to the analog VTR (not shown) via the output terminal 26. The error-corrected audio data is supplied to the DA converter 27 and converted to the analog audio signal. , And is supplied to an analog VTR (not shown) via the output terminal 28.

The analog video signal supplied to the analog VTR is supplied to the television monitor and displayed as an image on the screen thereof, and the analog audio signal is supplied to the speaker via the amplifier and output as audio. .

When the user specifies an access point through the user interface 20 while monitoring video and audio, the memory controller 19 stores the corresponding address data as in the case described with reference to FIG. When the recording track on the magnetic tape of the video tape cassette set in the recording side digital VTR becomes the track of the editing point, the recording side digital V
A timing signal indicating that is output from the TR
Is supplied to the system controller 17 via.

The system controller 17 controls the memory controller 19 based on the timing signal supplied from the recording side digital VTR via the input / output terminal 15. The memory controller 19 receives the access point address signal and the read address signal from the memory 8d of the input / output circuit 8 according to the control signal from the system controller 17.
Supply to. Similarly to the above, the digital data read from the memory 8d is output as an analog video signal from the output terminal 26 and as an analog audio signal from the output terminal 28, and is supplied to the recording side digital VTR.

At this time, the recording-side digital VTR has just been switched to the recording state. Therefore, the analog video and audio signals output from the reproducing side digital VTR are supplied to the recording side digital VTR connected to the reproducing side digital VTR, and the video tape cassette set in the recording side digital VTR. Is recorded on the magnetic tape to form inclined tracks.

FIG. 7 shows a state in which the storage data Min is sequentially read from the memory 8d and is output as the analog video and audio signal Dout. In this example, the access point is attached with the numeral "1". In the case of the present data, the data with the number “8” added at the point OP indicating the current output point is read from the memory 8d and output.

In the above example, the reproduction side digital V
The video and audio signals reproduced by TR are recorded on the digital V side.
The case of supplying to the TR and recording on the magnetic tape of the video tape cassette set on the recording side digital VTR has been described, but the same applies even if the recording side is not the digital VTR but the analog VTR. However, in the case of the analog VTR, it is detected by the CTL signal or the time code that the position of the magnetic tape has become the position of the recording track immediately before the recording track of the edit point IP or the position of the edit point IP. In that case, it is necessary to inform the reproducing side digital VTR of that fact.

Now, when the data stored in the memory 8d is read out as described above, if the vertical synchronizing signal from another VTR is used as a reference, the reproduced data from the tape transport 11 is supplied to the other VTR. And other VT
When recording on the magnetic tape Tape of the video tape cassette set to R, the operation mode of the other VTR is the edit point on the magnetic tape Tape of the video tape cassette set to the other VTR. If the recording mode is set when the edit point is reached until the playback mode is reached, the output timing of the digital VTR shown in FIG. 1 and the output timing of another VTR do not have to be adjusted. Can be matched.

That is, the VTR on the recording side simply edits the edit point I
At P, it is sufficient to switch the mode from playback to recording. Since the read timing of the memory 8d of the digital VTR shown in FIG. 1 is simply adjusted to the operation timing of the VTR on the recording side, a mechanism for controlling a capstan motor or the like, like the conventional phase adjustment, is used. Unlike the method of controlling the parts, all can be performed electrically.

H. 1 / of the digital VTR shown in FIG.
Explanation of operation during 5x speed playback (see Fig. 8)

FIG. 8 shows the digital VTR 1 shown in FIG.
It is an explanatory view for explaining the operation at the time of / 5 speed reproduction.
In this case, a television monitor is connected to the output terminal 26 shown in FIG. 1, and a speaker is connected to the output terminal 28 via an amplifier. The control of the memory controller 19 for the memory 8d and the control of the system controller 17 for the tape transport 11 are shown in FIG.
Since it has been described with reference to, the description thereof will be omitted here.

In the figure, parts corresponding to those in FIGS. 6 and 7 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, analog video and audio signals D
The code "1st" attached to out indicates that the video signal of the frame is interpolated by the video signal of the first field, and "2st" indicates the video signal of the frame of the video of the second field. It indicates that the interpolation is performed by the signal, and "1/2" means that the image of the frame is output without the interpolation. Interpolation is performed in this manner because the output image is blurred unless output is performed for each field.

That is, in this example, since the reproduction is ⅕ speed, the finally output analog video signal is the video data for each frame recorded on the magnetic tape Tape in the figure at the time of output. In, "1st",
There are five frames such as "1st", "1/2", "2nd", and "2nd". That is, the speed becomes 1/5 times.

The operation is as follows. That is, the user uses the operation key group 20k of the user interface 20 to make a tape transport 1 at a rough access point.
When 1 is stopped, the system controller 17 causes the position of the magnetic tape of the video tape cassette set in the tape transport 11 to be several hundred frames before the rough access point designated by the user. The tape transport 11 is controlled so that reproduction is performed after rewinding. After that, when the user operates the shuttle key 20s of the user interface 20 to instruct the system controller 17 to perform, for example, ⅕ speed reproduction, the system controller 17 supplies a control signal to the tape transport 11 so that the tape transport 11 can be operated. Enter the playback state.

The digital data reproduced in the tape transport 11 and supplied to the memory 8d of the input / output circuit 8 is written as the storage data Min in the memory 8d by the write side address signal and the write control signal from the memory controller 19. At this time, the system controller 17 puts the data in the memory 8d into a paused state until the reading is completed after reproducing the data for several hundreds of frames so that the amount of data always held in the memory 8d becomes several hundreds of frames. , And controls the reading of the tape transport 11.

On the other hand, the memory controller 19 reads digital data from the memory 8d under the control of the system controller 17. At this time, the read reference is the reproduction synchronization signal (vertical synchronization signal, etc.) SYNC in the reproduction data from the tape transport 11 when the tape transport 11 is in the reproduction state or the reproduction paused state. is there.

In this example, since the speed is ⅕, the same frame data may simply be output from the memory 8d five times, and the output may be held in the frame memory 24 and then output. Output terminal 2
Since the analog video signal output from No. 6 is 1/5 times speed, the ODD field, E
VEN field, output in the next field like ODD field, EVEN field, OD
The output image looks blurred on the screen due to the difference between D and EVEN.

Therefore, for example, interpolation is performed when writing or reading video and audio data in the frame memory 24. As the interpolation method, a well-known dedicated interpolation circuit is provided to perform the interpolation, or the ODD field of the digital data to which the numeral “1” is added among the stored data Min stored in the memory 8d. Read digital data twice (1st), then OD
Digital data of D field is read twice (1s
t), followed by EDD digital data and E
The digital data of the VEN field is sequentially read (1/2), the digital data of the EVEN field is read twice (2nd), and the digital data of the EVEN field is read twice (2nd).

That is, the data in the ODD field is written twice in the frame memory 24 in the first frame period, and in the next frame period, the OD field data is written.
The data of the D field and the data of the EVEN field are written, and the data of the EVEN field is written twice in the next frame period. Therefore, the video signal output from the output terminal 26 is "1st", "1st", "1 /" when viewed in frame units as shown in FIG.
2 ”,“ 2nd ”, and“ 2nd ”.

By the above interpolation processing, the analog video signal output from the output terminal 26 shown in FIG. 1 has a "1st" image, a "1st" image, and a "1 / st" image in one frame.
The image is composed of the image "2", the image "2st", and the image "2nd". There is no blur between the first "1st" image and the next "1st" image, and the first "2nd" image. There is no image blur between the image of "1st" and the image of "2nd", and there is no blurring of the image between the image of "1st" and the image of "2nd".
With the "1/2" image, it is possible to reduce the blurring to a minimum.

I. Description of operation at 9 times speed reproduction of the digital VTR shown in FIG. 1 (see FIG. 9)

FIG. 9 shows the digital VTR 9 shown in FIG.
FIG. 8 is an explanatory diagram for explaining an operation during double speed reproduction. In this case, a television monitor is connected to the output terminal 26 shown in FIG. 1, and a speaker is connected to the output terminal 28 via an amplifier.

In the figure, parts corresponding to those in FIGS. 6 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

In this example, it is necessary for the user to specify in advance a period in which high-speed reproduction (also referred to as reproduction at a speed equal to or higher than 1 × speed, quick motion, etc.) is desired. As a method of specifying this, as described above, the tape transport 11 reproduces the recording signal recorded on the magnetic tape of the video tape cassette, and the reproduced image and sound are monitored while being used at high speed reproduction. The start position and the end position of the period to be set are designated in advance by pressing a designation key on the operation panel of the user interface 20.
As a result, the time code of the first track of the period and the time code of the track of the end portion of the period are stored in the memory of the system controller 17 or the like.

When the user specifies the period for high speed reproduction, the system controller 11 controls the tape transport 11 and the tape transport 11 is controlled.
The position of the magnetic tape of the video tape cassette set in is set to the above-mentioned start position (or a position in consideration of the pre-roll period), and then the tape transport 1
1 is set in the reproduction state, and the memory controller 19 is controlled based on the reproduction synchronization signal.

The digital data reproduced by the tape transport 11 is sequentially written in the memory 8d. At this time, the system controller 17 supplies a control signal to the memory controller 19 with the synchronization signal SYNC from the synchronization detection / data extraction circuit 13 as a reference, and writes data to the memory controller 19 every 4 or 5 times. Control to write to.

Further, the system controller 17 monitors the time code supplied from the error correction processing circuit 22, and when it recognizes that it is the time code of the last track of the above period, sends a control signal to the memory controller 19. It is supplied and the writing of digital data to the memory 8d is stopped. As a result, the digital data corresponding to the above period for high speed reproduction is written in the memory 8d once in every 4 or 5 frames.

In FIG. 9, from the digital data with the numeral "1" to the digital data with the numeral "37", the digital data is stored in the memory 8d once every nine times. It shows a state of being written as data Min. In the memory 8d,
"1", "5", "9", "14", "19", "2"
The storage data Min to which the numbers “3”, “28”, “32”, and “37” (considered as frame numbers) are added are sequentially written.

At the time of reading from the memory 8d,
The memory controller 19 supplies an address signal and a read control signal to the memory 8d based on the reference clock signal from the clock generator 17a shown in FIG. As a result, the digital data stored in the memory 8d becomes "1", "5", ... "28", ... "37".
In this order, the reading is performed at the normal reading speed. At this time, as shown in FIG. 9, the memory controller 19 uses the ODD field for the digital data with the numeral “1” and the EVEN field with the numeral “1” for the digital data with the numeral “5”.
OD for digital data with 0 "attached
D field, EVEN field for digital data with numeral "14" added, ... Read out each digital data as ODD, EVE
Alternately read like N.

The digital data read out as described above is subjected to error correction processing in the error correction processing circuit 22. After the error correction processing is performed in the error correction processing circuit 22, the video data passes through the compression / decoding circuit 23, the frame memory 24, and the DA converter 25, and is then output as an analog video signal through the output terminal 26. . On the other hand, the audio data is output via the D / A converter 27 as an analog audio signal via the output terminal 28. The output process will be described in the next item J.

J. Description of the output operation during 9 × speed reproduction of the digital VTR shown in FIG. 1 (see FIG. 11)

FIG. 11 is an explanatory diagram for explaining the output operation of the digital VTR shown in FIG. 1 during 9 × speed reproduction.

In the figure, PV is digital data reproduced from the magnetic tape of the video tape cassette set in the tape transport 11 shown in FIG. 1, OU.
T1 is the output video signal when the interpolation processing described with reference to FIG. 8 is performed and output, and OUT2 is the output when the digital data of the ODD or EVEN field is alternately read from the memory 8d from each frame as described above. Video signal, 1f indicates an ODD field, and 2f indicates an EVEN field.

From the memory 8d, one frame is an ODD field and the other frame is an EVEN field.
The digital data of the field are read out alternately.
The read digital data of the field of each frame is supplied to the error correction processing circuit 22. The digital video data output from the error correction processing circuit 22 is subjected to decoding processing in the compression decoding circuit 23, and then sequentially written in the frame memory 24.

At this time, as the data state of the frame memory 24, as shown in OUT1, the ODD field of the digital data to which the numeral "1" is added in the reproduced digital data PV and the numeral "5" are initially set. The data in the EVEN field of the attached digital data is stored. After these digital data are read from the frame memory 24, they are sequentially converted into analog video signals in the DA converter 25 and output through the output terminal 26.

Next, in the reproduced digital data PV, the data in the ODD field of the digital data with the numeral "9" and the data in the EVEN field of the digital data with the numeral "14" are stored.
After these digital data are read from the frame memory 24, they are sequentially converted into analog video signals in the DA converter 25 and output through the output terminal 26.

Next, in the reproduced digital data PV, the data in the ODD field of the digital data with the numeral "19" and the data in the EVEN field of the digital data with the numeral "23" are stored. After these digital data are read from the frame memory 24, they are sequentially converted into analog video signals in the DA converter 25 and output through the output terminal 26. Then, similarly, the frame memory 2
Digital data of different fields of different frames once stored in 4 are sequentially output as the output video signal OUT2.

Output video signals OUT1 and OU shown in FIG.
As can be seen by comparing T2, the output video signal OUT1
Is a frame interpolated based on each ODD field of the storage data Min of the memory 8d. Therefore, assuming that the reproduced digital data PV is expressed in time series in the figure, each frame of the output video signal OUT1 is generated by being interpolated by the ODD field of the digital data stored in the memory 8d. Therefore, in this example, as information, among the storage data Min stored in the memory 8d, the data of the frame to which the numeral “1” is attached and the frame to which the numeral “9” is attached. The data, the data with the numeral "19", and the data with the numeral "28" are added, and the reproduced images have different information such as "1", "9", "19", and "28". The degree becomes larger, and it is not a smooth transition.

On the other hand, if the reproduced digital data PV is expressed in time series in the figure, the output video signal OUT2 in this example is ODD or E for each frame from the storage data Min stored in the memory 8d.
Since the VEN field is taken out, in this example, as information, the data of the frame to which the number “1” is attached and the number “5” to the storage data Min stored in the memory 8d are attached. Frame data, data with number "9", number "14"
The data attached with, the data attached with the number “19”, the data attached with the number “23”, and the data attached with the number “28” become the reproduced images “1”, “ 5 ”,“ 9 ”,“ 14 ”,“ 19 ”,
The degree of information change such as “23” and “28” is reduced, resulting in a smooth transition.

K. Description of the access method at the editing point when editing is performed using the digital VTR shown in FIG.
reference)

FIG. 11 is an explanatory diagram for explaining the operation when the jog dial of the operation panel of the user interface 20 is used in the digital VTR shown in FIG. In this case, a television monitor is connected to the output terminal 26 shown in FIG. 1, and a speaker is connected to the output terminal 28 via an amplifier.

In the figure, parts corresponding to those in FIGS. 6 to 10 are designated by the same reference numerals, and detailed description thereof will be omitted. The jog dial 20j allows the user to use the tape transport 11
It is often used for the purpose such as searching for the edit point IP of the magnetic tape of the video tape cassette set in.

As a condition for using the jog dial 20j, as described above, the user roughly determines the access point by operating a predetermined key of the operation key group 20k of the user interface 20 while watching the reproduced image. is necessary. When the rough access point is thus determined, the system controller 17 supplies a control signal to the tape transport 11 to put the tape transport 11 into the rewinding state, for example, when rewinding for several hundred frames. Then, the control signal is supplied to the tape transport 11, the tape transport 11 is once stopped, and then the tape transport 11 is brought into the reproduction state.

As shown in FIG. 11, the recorded data is sequentially reproduced from the magnetic tape Tape of the video tape cassette set in the tape transport 11. The reproduced data is once written in the memory 8d under the control of the memory controller 19 as described above.
When, for example, several hundreds of frames of digital data are stored in the memory 8d, the jog dial 20j becomes usable, and the system controller 17 visually notifies that fact through the display 20a of the user interface 20.

The jog dial 20j is operated by rotating it and displays an image at a speed corresponding to the rotating speed at this time. That is, the system controller 17 controls the memory controller 19 so as to change the reading of the stored data Min from the memory 8d based on the rotation speed data supplied from the user interface 20 by operating the jog dial 20j.

The memory controller 19 controls the control signal from the system controller 17 (tape transport 1
1 is in a stopped state, so in this case, the stored data Min of the memory 8d is selectively read out based on the control signal generated based on the internal reference clock. For example, when the jog dial j is rotated at a speed corresponding to the normal reproduction speed, as shown in FIG. 11, the stored data Min is sequentially read from the memory 8d without loss, but the jog dial j corresponds to double speed reproduction. When rotated at a speed, in the example shown in FIG. 11, the numbers "1", "3", "5", "7", and "9" are 1
The storage data Min of the memory 8d is read and output every frame.

As described above, in this example, in the multi-segment recording type digital VTR,
Between the error correction code adding circuit 7 and the channel coding circuit 9, and the channel decoding circuit 14
The memory 8d is provided between the error correction processing circuit 22 and the error correction processing circuit 22, and the processing according to the mode is performed as described below.

During normal recording, the input video and audio data is once written in the memory 8d and then read out, and the read video and audio data is read by the magnetic tape of the video tape cassette set in the tape transport 11. Record on tape.

During normal reproduction, the video and audio data reproduced from the magnetic tape of the video tape cassette set in the tape transport 11 is once written in the memory 8d and then read out to read out the video and audio data. Is output to the outside.

As in so-called insert recording, etc., the input video and audio data at the edit point of the input video and audio data at the edit point IP on the magnetic tape of the video tape cassette set in the tape transport 11 When recording, the memory controller 19 controls the input / output circuit 8 under the control of the system controller 17, the output of the error correction code adding circuit 7 is once written in the memory 8d, and the storage data Min written in the memory 8d is written. The system controller 19 controls the system controller 19 when the video and audio are supplied to the error correction processing circuit 22 and the user monitors the video and audio and the user presses a predetermined key of the operation key group 20k to specify an edit point. Causes the memory controller 19 to control the input / output circuit 8.
The storage data Min read from the memory 8d is supplied to the channel coding circuit 9.

For example, in the case of 1 / N speed reproduction when the normal reproduction speed is set to 1 speed, such as 1/5 speed reproduction, the data reproduced several hundred frames ahead is reproduced in the memory 8d. After that, the stored data Min of the memory 8d is read a plurality of times, and at that time, data interpolated by the data of the ODD field is output from the first frame to the central frame, and the central frame outputs all the frames. The data is output as it is, and the data after that is interpolated with the data of the EVEN field.

[0200] For example, when the normal reproduction speed is set to 1x speed, such as 9x speed reproduction, etc., at the time of Nx speed reproduction,
Data that is reproduced by preceding by several hundreds of frames is intermittently written to the memory 8d, and then, when the stored data Min of the memory 8d is read, like the ODD field in the first frame and the EVEN field in the next frame, The ODD or EVEN field is read alternately for each frame.

When deciding a desired position on the magnetic tape set in the tape transport 11 as in the case of deciding an edit point, the data reproduced in advance of several hundreds of frames is written in the memory 8d. After that, based on the operation information (rotational speed information) of the jog dial 20j, the stored data Min of the memory 8d is selectively read (when the reading is performed at intervals, the intervals are changed, etc.).

By enabling the above processing to be performed, insert recording, which conventionally relies on the control of the capstan motor and the accuracy of the mechanical portion of the tape transport,
Instead of directly accessing the magnetic tape and using the data reproduced from the magnetic tape to determine the editing point, the data reproduced from the magnetic tape is temporarily stored in the memory 8d and the data stored in the memory 8d is read. Since the access is made, it is only necessary to operate the mechanical portion, and in the case of 1 / N speed reproduction, N speed reproduction, etc., it is not necessary to further use the DT head. That is, it is possible to eliminate the conventional control of the operation of the mechanical portion, such as the reproduction by the so-called shuttle key 20s, the reproduction by the jog dial 20j, and the control for the phase adjustment.
Therefore, it is not necessary to use a DT head, and the most accurate access can be performed without increasing the precision and assembly precision of each component of the mechanical portion, thereby improving the precision of image and audio data without increasing the cost. be able to.
In addition, when performing editing, etc. using two or more VTRs, it is possible to electrically perform phase adjustment, so even when using one VTR, use two or more VTRs for the purpose of editing, etc. Also in this case, the above-mentioned great effect can be obtained.

[Second Embodiment] In the first embodiment, the case where the memory 8d is used as a FIFO and the processing is performed while the tape transport 11 is continuously operated has been described. However, for example, a plurality of frame memories are provided and writing is performed. The reading may not collide. For example, one frame memory is A and the other frame memory is B
In such a case, writing is performed in the order of the frame memories A and B, and the reading from the frame memory A is started at the time when the writing to the frame memory A is completed halfway or when the writing is finished, and the writing to the frame memory B The writing and reading may be controlled so that the reading from the frame memory A ends when the writing ends. In the case of this configuration, there is an advantage that the writing and reading control becomes easier.

[Third Embodiment] In the first embodiment described above, the case where the memory 8d is used as a FIFO to perform processing while the tape transport 11 is continuously operated has been described. However, for example, a large capacity memory is provided, After writing the entire portion to be used in the memory, the tape transport 11 is temporarily stopped, the data stored in the memory is read after the access point is determined, and the video tape set in the tape transport 11 is read. When the position on the magnetic tape of the cassette becomes the last data written in the memory, the reproduction may be started from the recording track corresponding to the data next to the data. That is, when the last data stored in the memory is the data corresponding to the ninth recording track of the recording tracks of the frame, after the last data stored in this memory is read out. The data corresponding to the tenth recording track of the frame may be reproduced from the tape transport 11. In this case, since it is not necessary to control the tape transport 11 as well as the control of writing and reading the data to and from the memory 8d, there is an advantage that the process is simplified.

[Fourth Embodiment]

In the first embodiment, the case has been described in which all the data is written in the memory 8d during high-speed reproduction such as 9-times speed reproduction, and selectively read during reading, but the data is written in the memory 8d. At this time, writing may be selectively performed, and at the time of reading, it may be directly read. In this case, if only high-speed reproduction at a predetermined speed is performed, there is an advantage that extra data need not be written and the storage capacity of the memory 8d can be effectively used.

[Fifth Embodiment] In the first embodiment, the case where the present invention is applied to the digital VTR has been described. However, the reproduction data reproduced from the recording medium is once written in the memory and the memory is accessed. By doing so, the processing required when directly accessing the recording medium,
In particular, the idea of enabling high-speed and accurate processing without performing an operation to control a mechanical part is, for example, a magneto-optical disk, a CD-ROM.
It can be applied to optical disks, hard disks, etc. In the case of application, the timing control of the memory shown in FIG. 1 and the system controller 17 and the memory controller 19 shown in FIG. 1 can be applied as they are. Let's do it.

[0208]

According to the recording / reproducing method of the present invention described above,
When the input video and audio signals to be recorded are recorded from the edit points of the main recording medium, the input video and audio signals to be recorded are subjected to signal processing for recording and then once accessed faster than the main recording medium. Recorded on the fast auxiliary recording medium, the main recording medium is reproduced, and the main recording medium is reproduced based on the position information on the main recording medium obtained from the auxiliary recording medium to the auxiliary recording medium. When the timing to read the input video and audio signals to be recorded is obtained from the edit point, and when the position of the main recording medium becomes the edit point on the main recording medium, based on the timing, from the auxiliary recording medium By reading the input video and audio signals to be recorded and recording them on the main recording medium,
When an edit point on the main recording medium is detected from the position information recorded on the main recording medium, the input video and audio signals are read from the auxiliary recording medium, and the read input video is read. Also, the audio signal is recorded in the main recording medium, which has the effect that the access speed and the recording / reproducing accuracy can be improved by the auxiliary recording medium.

According to the above-described recording / reproducing method of the present invention, when the video and audio signals reproduced by the first device are recorded from the editing point of the main recording medium of the second device,
The video and audio signals obtained by being reproduced by the first device are once recorded on an auxiliary recording medium having an access speed faster than that of the main recording medium of the first device, and then the recorded video and audio signals are read out and read out. Edited points to be recorded on the main recording medium of the second device while outputting the reproduced video and audio signals for the monitor as the reproduced video and audio signals for the monitor and outputting the reproduced video and the audio signals for the monitor. , The address data of the designated video and audio signals on the auxiliary recording medium is held, the main recording medium of the second device is reproduced, and the main recording medium is reproduced. Based on the obtained position information on the main recording medium, the first
Timing of reading out the specified video and audio signals from the edit point on the auxiliary recording medium of the apparatus, the position of the main recording medium of the second apparatus is the edit point on the main recording medium. Then, based on the above timing, the video and audio signals after the video and audio signals designated by the first device are read from the auxiliary recording medium of the first device, and the read video and audio signals are read. After performing the signal processing for reproduction on the signal, the second
Of the video and audio signals reproduced by the first device and recorded on the auxiliary recording medium by outputting the data for recording to the second device and recording from the edit point on the main recording medium of the second device. If an edit point is specified during the operation, the address data of the auxiliary recording medium at that time is held, the second device is set to the reproduction mode, and the position information obtained from the reproduction signal is the edit point on the recording medium. Then, the video and audio signals are read from the auxiliary recording medium, and the read video and audio signals are subjected to edit processing and then sequentially recorded from the editing point on the recording medium of the second device. As a result, it is possible to improve the recording / reproducing accuracy by the access speed and the auxiliary recording medium, and to improve the efficiency of the processing work related to the editing and the accuracy of the editing result.

According to the recording / reproducing method of the present invention described above, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed, the main recording medium is usually reproduced. At least N frames when the video and audio signals obtained by reproducing at the reproduction speed are temporarily recorded in the auxiliary recording medium having an access speed faster than that of the main recording medium and the video and audio signals are read from the auxiliary recording medium. By outputting the video and audio signals every minute, the video and audio signals intermittently read out every N frames from the auxiliary recording medium are output as different video and audio signals. In particular, a display state equivalent to high-speed playback is formed, which makes it possible to obtain a noise-free image even during high-speed playback while achieving downsizing, weight reduction, and cost reduction of the device. There is an effect that that.

According to the recording / reproducing apparatus of the present invention described above, when reproducing from the main recording medium, the read output from the auxiliary recording medium having an access speed faster than that of the main recording medium is apparently reproduced from the main recording medium. And the video and audio signals are directly output to the main recording medium when the video and audio signals are recorded on the main recording medium. By recording, the process in which the read output from the auxiliary recording medium is actually used is performed only in the device, and thereby, the operability and the use environment can be provided to the user as before, and more This has the effect of improving work efficiency.

According to the recording / reproducing apparatus of the present invention described above, when the input video and audio signals to be recorded are recorded from the editing point of the main recording medium, the recording processing means for the input video and audio signals to be recorded. After the signal processing for recording is performed by the auxiliary recording medium control means under the control of the control means, the video and audio signals subjected to the signal processing for recording by the recording processing means are temporarily transferred from the main recording medium. When recording on an auxiliary recording medium having a high access speed, and when the position of the main recording medium becomes an editing point on the main recording medium, the auxiliary recording medium is recorded on the basis of the timing signal from the timing generating means. The input video and audio signals to be recorded are read by the auxiliary recording medium control means and recorded on the main recording medium, so that the position of the main recording medium becomes the editing point. In this case, the video and audio signals are read from the auxiliary recording medium by the auxiliary recording medium control means based on the timing generating means, and the read video and audio signals are sequentially recorded from the editing point on the main recording medium. With this, it is possible to reduce the size, weight, and cost of the apparatus, and to improve the accuracy and access speed of the system for recording / reproducing the main recording medium and improve the editing efficiency. .

Further, according to the present invention described above, in the recording / reproducing apparatus, in the timing generating means,
The position information extracting unit extracts position information from the reproduction signal reproduced by the recording / reproducing unit, and the time measuring unit measures time from the time when the position information extracting unit extracts the position information. Of the reproduction time information used for reproducing between the sector in which is recorded and the sector for recording the next video and audio signal, and actually after the video and audio signal is read from the auxiliary recording medium. The signal transmission time information consumed until the recording is started on the main recording medium is held in the holding means, and the control means controls the auxiliary recording medium control means based on the reproduction time information and the signal transmission time information. The time is obtained by the calculating means, and the control timing time information from the calculating means is compared with the measured time information from the time measuring means by the timing generating means. When these match, by supplying a timing signal serving as a reference for controlling the auxiliary recording medium to the control means, the control timing time information obtained by the calculating means and the auxiliary recording medium obtained by the measuring means When the timing generation means detects a match with the measurement time information that is consumed from the time when the video and audio signals are read out to the time when it is actually recorded in the main recording medium, the timing generation means outputs the timing signal. ,
The timing signal causes the auxiliary recording medium to read out the video and audio signals, which has the effect of improving the editing accuracy.

Further, according to the present invention described above, the auxiliary recording medium control means of the first device reproduces the video and audio signals obtained by reproduction by the first device, and the auxiliary recording is faster than the main recording medium. After recording once on the medium, the recorded video and audio signals are read out, and the read out video and audio signals are output as reproduction video and audio signals for monitoring through the reproduction processing means to reproduce the video and audio signals for monitoring. When an editing point to be recorded on the main recording medium of the second device is specified while outputting the audio signal,
The address data of the designated video and audio signals on the auxiliary recording medium is held by the control means, the main recording medium of the second device is reproduced by the recording / reproducing means, and the main recording medium is reproduced. Based on the position information on the main recording medium obtained as described above, the timing generating means of the first device determines the timing of reading the designated video and audio signals from the edit point on the auxiliary recording medium of the first device. And when the position of the main recording medium of the second device becomes the edit point on the main recording medium, the control means of the first device controls the timing from the timing generating means of the first device. Based on the signal, the video and audio signals subsequent to the video and audio signals designated by the first device are read from the auxiliary recording medium of the first device, and the read video and audio signals are read. Is output for recording to the second device after being subjected to signal processing for reproduction by the reproduction processing means of the first device, and is recorded on the main recording medium of the second device by the second device. By recording from the edit point by the reproduction means, if the edit point is specified during reproduction of the video and audio signals reproduced by the first device and recorded on the auxiliary recording medium, the auxiliary at that time is specified. When the address data of the recording medium is held, the second device is set to the reproduction mode, and the position information obtained from the reproduction signal becomes the editing point on the recording medium, the video and audio signals are read from the auxiliary recording medium. The video and audio signals that are output and read are sequentially recorded from the editing point on the recording medium of the second device after being subjected to the editing process, thereby reducing the size, weight and cost of the device. Can be planned Both enhance the accuracy and access speed of the system for recording and reproduction of the main recording medium,
The effect is that the editing efficiency can be improved.

Further, according to the present invention described above, in the above-mentioned recording / reproducing apparatus, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed 1 / N times the normal reproduction speed, Video and audio signals obtained by reproducing the main recording medium at a normal reproduction speed are temporarily recorded in the auxiliary recording medium by the auxiliary recording medium control means, and the video and audio signals are recorded from the auxiliary recording medium in the auxiliary recording. When the medium control means reads out the video and audio signals of at least the original frame N times, the video and audio signals read N times per frame from the auxiliary recording medium are the same video and audio signals. Is output N times each, so that a display state that is visually and auditorily equivalent to low-speed playback is formed, and this makes it possible to reduce the size, weight, and cost of the device. In 1 / N times speed reproduction, there is an effect that it is possible to obtain a good image without noise.

Further, according to the present invention described above, in each of the above inventions, when the video and audio signals are read from the auxiliary recording medium and the video signal of at least the original frame is output N times, the first half of the frames is the first. The video signal of the original frame is used for the center frame and the video signal of the second field is used for the latter half of the frame to interpolate based on the video signal of the second field. In the above configuration, the first half is a frame interpolated based on the video signal of the first field, the next is a video signal of the original frame, and the second half is a frame interpolated based on the video signal of the second field. It becomes the composition,
Visually, there is an effect that a so-called smooth display state with little change is formed, and thereby a more accurate image can be obtained.

Further, according to the present invention described above, in each of the above inventions, the video and audio signals obtained by reproducing from the main recording medium are recorded in the auxiliary recording medium, and the video and audio signals are recorded from the auxiliary recording medium. When performing 1 / N speed reproduction, the auxiliary recording medium control means records a predetermined amount of M video and audio signals on the auxiliary recording medium in a period having a length of M times the unit period. Then, after the recording of the M video and audio signals, the M video and audio signals recorded in the period from the auxiliary recording medium are sequentially read out within a period of M × N times the unit period. , A predetermined amount of M video and audio signals recorded on the auxiliary recording medium in a period having a length of M times the unit period are sequentially read N times each within a period of M × N times the unit period. , From the auxiliary recording medium Since the same video and audio signals are output N times for each frame, the same visual and audio signals are output N times, so that a display state visually and auditorily equivalent to low-speed reproduction is formed. There is an effect that a good image without noise can be obtained at the time of 1 / N speed reproduction, while reducing the size, weight and cost of the device.

Further, according to the present invention described above, in each of the above inventions, the video and audio signals obtained by reproducing from the main recording medium are recorded on the auxiliary recording medium, and the video and audio signals are recorded from the auxiliary recording medium. Is read out and 1 / N speed reproduction is performed, a predetermined amount of M video and audio signals are recorded in the auxiliary recording medium in a period having a length of M times the unit period, and the M video and audio signals are recorded. After recording the signals, the M video and audio signals are sequentially read out within a period of M × N times the unit period, and the reproduction of at least a predetermined amount of M video and audio signals is completed by the recording / reproducing means. At this point, under the control of the control means, the recording / reproducing means puts the reproduction of the main recording medium into the reproduction stopped state or the reproduction paused state, and when the video and audio signals are written next,
Under the control of the control means, the recording / reproducing means reproduces the main recording medium at a time point before the time when the main recording medium is reproduced by the recording / reproducing means and video and audio signals are actually obtained. As a result, a predetermined amount of M recorded in the auxiliary recording medium in a period having a length M times as long as the unit period is recorded.
The individual video and audio signals are sequentially read out N times each within a period of M × N times the unit period, and 1 is read from the auxiliary recording medium.
For the video and audio signals read N times per frame, the same video and audio signals are output N times, so
In addition to forming a display state that is visually and audibly equivalent to slow-speed playback, preparations for the next processing are made.
1 / N while reducing device size, weight, and cost
There is an effect that a good image free from noise can be obtained in double-speed reproduction and the work efficiency can be improved.

According to the present invention described above, in the above inventions, when the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed, the main recording is performed. When the video and audio signals reproduced from the medium at a normal reproduction speed are temporarily recorded in the auxiliary recording medium by the auxiliary recording medium control means and the video and audio signals are read from the auxiliary recording medium, at least N frames are recorded. By outputting the video and audio signals every minute, the video and audio signals intermittently read out every N frames from the auxiliary recording medium are output as different video and audio signals. By forming a display state that is equivalent to high-speed playback, this makes it possible to obtain a good image with no noise even during high-speed playback, while achieving downsizing, weight reduction, and cost reduction of the device. That there is an effect that it is.

Further, according to the present invention described above, in each of the above inventions, when the video and audio signals are read from the auxiliary recording medium, at least the video and audio signals within N frames are evenly divided by field for two frames or more. By outputting every N frames, the video and audio signals read out from the auxiliary recording medium evenly every N frames for 2 frames or more are output as video and audio signals of different frames. , Which is equivalent to high-speed playback visually and audibly, and which forms a smooth display state, thereby achieving downsizing, weight reduction, and cost reduction of the device, and obtaining a highly accurate and good image. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration example of a digital VTR showing an embodiment of a recording / reproducing method of the present invention and an apparatus thereof.

FIG. 2 is an input / output circuit 8 of the digital VTR shown in FIG.
It is a block diagram which shows the example of an internal structure.

3 is a configuration diagram showing an internal configuration example of a track information detection circuit 16 of the digital VTR shown in FIG.

FIG. 4 is an explanatory diagram showing an example of a tape format used for explaining an embodiment of a recording / reproducing method and an apparatus thereof according to the present invention.

5 is a flowchart for explaining an operation centered on the operation of the track information detection circuit 16 shown in FIG.

FIG. 6 is an explanatory diagram for explaining an embodiment of a recording / reproducing method and an apparatus thereof according to the present invention, for explaining an operation when an input video and audio signal is recorded from an edit point IP on a magnetic tape.

FIG. 7 is an explanatory diagram for explaining a normal reproducing operation for explaining an embodiment of a recording / reproducing method and an apparatus thereof according to the present invention.

FIG. 8 is an explanatory diagram for explaining an embodiment of a recording / reproducing method and an apparatus thereof according to the present invention, for explaining an operation during 1/5 speed reproduction.

FIG. 9 is an explanatory diagram for explaining an operation at 9 × speed reproduction for explaining an embodiment of a recording / reproducing method and an apparatus thereof according to the present invention.

FIG. 10 is an explanatory diagram for explaining an operation at the time of outputting video and audio data during 9 × speed reproduction described with reference to FIG. 9;

FIG. 11 is an explanatory diagram for explaining the operation of the recording / reproducing method and the apparatus according to the present invention when determining the edit point on the magnetic tape.

FIG. 12 is a configuration diagram showing an example of a conventional editing system.

[Explanation of symbols]

 2, 6 A-D converter 3, 24 frame memory 4 compression coding circuit 7 error correction code addition circuit 8 input / output circuit 8d memory 8c, 8f switch 9 channel coding circuit 11 tape transport 13 sync detection / data extraction circuit 14 channels Decoding circuit 16 Track information detecting circuit 16b Track information extracting circuit 16c Arithmetic circuit 16d ROM 16e Timer 16f Timing generating circuit 17 System controller 19 Memory controller 20 User interface 21 Clock generating circuit 22 Error correction circuit 23 Compression encoding circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kamibun Kisio Kokubun 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (29)

[Claims] 1. An apparatus for performing signal processing for recording on an input video and audio signal to be recorded, and recording the input video and audio signal subjected to the signal processing for recording on a main recording medium. In the recording / reproducing method used, when recording the input video and audio signals to be recorded from the editing point of the main recording medium, the input video and audio signals to be recorded are subjected to signal processing for recording. Then, once recorded on an auxiliary recording medium having an access speed faster than that of the main recording medium, the main recording medium is reproduced, and based on position information on the main recording medium obtained by reproducing the main recording medium, The timing of reading the input video and audio signals to be recorded from the auxiliary recording medium from the editing point on the auxiliary recording medium is obtained, and the position of the main recording medium becomes the editing point on the main recording medium. Occasionally, based on the timing, it reads the input video and audio signals to be the recording from the auxiliary recording medium, recording and reproducing method for recording in the main recording medium. 2. The recording / reproducing method according to claim 1, wherein when the input video and audio signals are recorded on the auxiliary recording medium, control is performed with reference to a synchronization signal obtained from the input video signal. 3. The recording / reproducing method according to claim 1, wherein an internal reference clock signal is used when the video and audio signals are recorded on the main recording medium and when the video and audio signals are reproduced from the main recording medium. 4. The first video and audio signals to be recorded are subjected to signal processing for recording, and the input video and audio signals subjected to the signal processing for recording are recorded in a main recording medium. A recording / reproducing method used between the first device and the second device, wherein the video and audio signals obtained by reproduction by the first device are recorded from the editing point of the main recording medium of the second device. Reads the video and audio signals recorded after the video and audio signals obtained by being reproduced by the first device are once recorded on an auxiliary recording medium having an access speed faster than the main recording medium of the first device, The read video and audio signals should be output as reproduced video and audio signals for monitoring, and should be recorded in the main recording medium of the second device while the reproduced video and audio signals for monitoring are output. Specify edit points If there is, the address data of the designated video and audio signals on the auxiliary recording medium is held, the main recording medium of the second device is reproduced, and this main recording medium is reproduced. Based on the position information on the main recording medium, the timing for reading the designated video and audio signals from the edit point on the auxiliary recording medium from the auxiliary recording medium of the first device is obtained, and the second device is obtained. When the position of the main recording medium becomes the edit point on the main recording medium, the video and audio signals after the video and audio signal designated by the first device are transferred to the first based on the timing. Read out from the auxiliary recording medium of the above device, perform signal processing on the read video and audio signals for reproduction, and then output to the second device for recording, and the main recording medium of the second device. Recording and reproducing method for recording from the edit point. 5. When recording the video and audio signals on the auxiliary recording medium of the first device, control is performed with reference to a synchronization signal obtained by reproducing the main recording medium of the first device. The recording / reproducing method according to Item 4. 6. An internal reference clock signal of each device when recording the video and audio signals on the main recording medium of the second device and reproducing the video and audio signals from the first main recording medium. The recording / reproducing method according to claim 4, wherein 7. An input video and audio signal recorded on a main recording medium are reproduced, a reproduced video and audio signal are subjected to signal processing for reproduction, and an image and signal processed for this reproduction are recorded. A recording / reproducing method used in a device that outputs an audio signal as a reproduction signal, wherein the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed 1 / N times the normal reproduction speed. In this case, the video and audio signals obtained by reproducing from the main recording medium at a normal reproduction speed are temporarily recorded in an auxiliary recording medium having an access speed faster than that of the main recording medium, and the video and audio signals are recorded from the auxiliary recording medium. A recording / reproducing method of outputting at least the video and audio signals of the original frame N times when reading the audio signal. 8. When recording the video and audio signals on the auxiliary recording medium, control is performed on the basis of a synchronization signal obtained by reproducing the main recording medium, and the video and audio signals are output from the main recording medium. The recording / reproducing method according to claim 7, wherein an internal reference clock signal is used when reproducing. 9. When the video and audio signals are read from the auxiliary recording medium and at least the video signal of the original frame is output N times, the first half frame is interpolated based on the video signal of the first field, 8. The recording / reproducing method according to claim 7, wherein the video signal of the original frame is used as the frame of 1., and the interpolation of the second half frame is performed based on the video signal of the second field. 10. When the video and audio signals obtained by reproducing from the main recording medium are recorded on the auxiliary recording medium, the video and audio signals are read from the auxiliary recording medium, and 1 / N speed reproduction is performed. , A predetermined amount of M video and audio signals are recorded on the auxiliary recording medium in a period having a length M times as long as the unit period, and the auxiliary recording medium is recorded from the auxiliary recording medium after the recording of the M video and audio signals. The recording / reproducing method according to claim 7, wherein M video and audio signals recorded in the first period are sequentially read out within a period of M × N times the unit period. 11. A video and audio signal obtained by reproducing from the main recording medium is recorded on the auxiliary recording medium, and the video and audio signals are read from the auxiliary recording medium to perform 1 / N speed reproduction. A predetermined amount of M video and audio signals are recorded in the auxiliary recording medium in a period having a length M times as long as a unit period, and after the recording of the M video and audio signals, the auxiliary recording medium is first recorded. The M video and audio signals recorded in the period of are sequentially read within a period of M × N times the unit period, and at least a predetermined amount of M video and audio signals from the main recording medium are reproduced. When the reproduction is finished, the reproduction of the main recording medium is stopped or the reproduction is temporarily stopped, and when the predetermined amount of video and audio signals are sequentially written, the main recording medium is reproduced to actually reproduce the video and audio. signal Recording and reproducing method according to claim 7, wherein only time period until the resulting reproducing the main recording medium in front of the point. 12. An input video and audio signal recorded on a main recording medium are reproduced, the reproduced video and audio signal are subjected to signal processing for reproduction, and an image and signal processed for this reproduction are recorded. A recording / reproducing method used in a device that outputs an audio signal as a reproduction signal, wherein the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed. The video and audio signals obtained by reproducing from the main recording medium at a normal reproduction speed are temporarily recorded in an auxiliary recording medium having an access speed faster than that of the main recording medium, and the video and audio signals are recorded from the auxiliary recording medium. A recording / reproducing method of outputting a video and audio signal at least every N frames when reading out. 13. An internal reference signal is used for reproduction control of the video and audio signals recorded on the auxiliary recording medium,
8. The recording / reproducing method according to claim 7, wherein a synchronization signal obtained by reproducing the main recording medium is used as a reference signal for controlling the auxiliary recording medium. 14. When the video and audio signals are read from the auxiliary recording medium, the video and audio signals in at least N frames are evenly divided by 2 fields or more in N units.
The recording / reproducing method according to claim 7, wherein the recording / reproducing is performed for each frame. 15. A recording processing means for performing recording processing on a video and audio signal to be recorded, and recording the video and audio signal from the recording processing means on a main recording medium, and from the main recording medium. Recording and reproducing means for reproducing video and audio signals, access speed faster than the main recording medium for temporarily recording video and audio signals from the recording processing means, and video and audio signals reproduced by the recording and reproducing means Fast auxiliary recording medium, and video and audio signals reproduced by the recording / reproducing means,
And a reproducing system for performing a reproducing process on the video and audio signals from the recording processing means, and the recording / reproducing means is continuously, intermittently or stopped based on the recording mode and the reproducing mode. The auxiliary recording medium is controlled in such a state that the read output from the auxiliary recording medium is apparently reproduced from the main recording medium and directly output during reproduction from the main recording medium. A recording / reproducing apparatus which, when recording video and audio signals on the main recording medium, directly records the video and audio signals apparently input from the auxiliary recording medium on the apparent output. 16. A recording processing means for performing recording processing on a video and audio signal to be recorded, and recording the video and audio signal from the recording processing means on a main recording medium, and from the main recording medium. Recording and reproducing means for reproducing video and audio signals, access speed faster than the main recording medium for temporarily recording video and audio signals from the recording processing means, and video and audio signals reproduced by the recording and reproducing means Fast auxiliary recording medium, and video and audio signals reproduced by the recording / reproducing means,
And a reproduction system for performing reproduction processing on the video and audio signals from the recording processing means, auxiliary recording medium control means for controlling writing or reading of the video and audio signals on the auxiliary recording medium, Control means for controlling the recording / reproducing means so as to be continuous, intermittent or stopped, and for controlling the timing of the auxiliary recording medium control means, based on the mode and the reproducing mode. By the control, when reproducing from the main recording medium, it is assumed that the read output from the auxiliary recording medium is apparently reproduced from the main recording medium and directly output, and the When recording the audio signal, the video and audio signals that are apparently input are read directly from the auxiliary recording medium. Recording and reproducing apparatus shall be recorded in the medium. 17. A recording processing means for performing recording processing on a video and audio signal to be recorded, and recording the video and audio signal from the recording processing means on a main recording medium, and from the main recording medium. Recording and reproducing means for reproducing video and audio signals, access speed faster than the main recording medium for temporarily recording video and audio signals from the recording processing means, and video and audio signals reproduced by the recording and reproducing means Fast auxiliary recording medium, and video and audio signals reproduced by the recording / reproducing means,
And a reproduction system for performing reproduction processing on the video and audio signals from the recording processing means, auxiliary recording medium control means for controlling writing or reading of the video and audio signals on the auxiliary recording medium, The recording / reproducing means is controlled so as to be continuously, intermittently, or stopped based on the mode and the mode at the time of reproduction, and the main means is controlled by the recording / reproducing means and the control means for controlling the timing of the auxiliary recording medium controlling means. The input video and audio to be recorded from the auxiliary recording medium from the edit point on the auxiliary recording medium based on the position information on the main recording medium obtained by reproducing the recording medium and reproducing the main recording medium. And a timing generating means for obtaining a timing signal for reading a signal, and the input video and audio signals to be recorded are recorded from the editing point of the main recording medium. In this case, after the input video and audio signals to be recorded are subjected to signal processing for recording by the recording processing means, the auxiliary recording medium control means records the signals by the recording processing means under the control of the control means. The video and audio signals that have undergone the signal processing for are temporarily recorded in the auxiliary recording medium, and when the position of the main recording medium becomes an edit point on the main recording medium, A recording / reproducing apparatus in which the auxiliary recording medium control means reads the input video and audio signals to be recorded from the auxiliary recording medium on the basis of the timing signal and records the input video and audio signals on the main recording medium. 18. The recording / reproducing apparatus according to claim 17, wherein the position information on the main recording medium is a reference sector formed on the main recording medium at the time of recording or formatting. 19. The timing generating means includes position information extracting means for extracting the position information from a reproduction signal reproduced by the recording / reproducing means, and time from the time when the position information is extracted by the position information extracting means. A time measuring means for measuring the position information, the sector in which the position information is recorded, the reproduction time information spent for reproducing between the next video and audio signal recording sector, and the video from the auxiliary recording medium. And holding means for holding the signal transmission time information consumed from the time when the audio signal is read to the time when it is actually recorded on the main recording medium, and the control based on the reproduction time information and the signal transmission time information. Calculating means for obtaining a control timing time for the auxiliary recording medium control means, control timing time information from the calculating means, and the time measuring means. 18. The timing generating means for comparing the measured time information from the device and the timing generating means for supplying a timing signal serving as a reference for controlling the information auxiliary recording medium to the control means when they match. Recording and reproducing device. 20. When recording the input video and audio signals on the auxiliary recording medium, control is performed based on a synchronization signal obtained from the input video signal, and the video and audio signals are recorded on the main recording medium. 18. The recording / reproducing apparatus according to claim 17, wherein an internal reference clock signal is used in reproducing the video and audio signals from the main recording medium. 21. At least two recording / reproducing devices are prepared, one recording / reproducing device (hereinafter referred to as a first device) on the reproducing side, and the other recording / reproducing device (hereinafter referred to as a second device).
Is the recording side, and when the video and audio signals obtained by reproduction by the first device are recorded from the edit point of the main recording medium of the second device, they are obtained by reproduction by the first device. After the video and audio signals are once recorded on the auxiliary recording medium by the auxiliary recording medium control means of the first device, the recorded video and audio signals are read out, and the read out video and audio signals are reproduced video for monitoring and An edit point to be recorded on the main recording medium of the second device was designated while outputting the audio signal through the reproduction processing means and outputting the reproduced video and audio signal for the monitor. In this case, the address data of the designated video and audio signals on the auxiliary recording medium is held by the control means, the main recording medium of the second device is reproduced by the recording / reproducing means, and the main recording is performed. Based on the position information on the main recording medium obtained by reproducing the body, the timing of reading the specified video and audio signals from the edit point on the auxiliary recording medium of the first device is set to the first device. When the position of the main recording medium of the second device becomes an edit point on the main recording medium, the control unit of the first device generates the timing of the first device. The video and audio signals subsequent to the video and audio signals designated by the first device based on the timing signal from the means.
Read out from the auxiliary recording medium of the device, the read video and audio signals are subjected to signal processing for reproduction by the reproduction processing means of the first device, and then output to the second device for recording. 18. The recording / reproducing apparatus according to claim 17, wherein recording is performed from the editing point on the main recording medium of the second apparatus by the recording / reproducing means of the second apparatus. 22. When the video and audio signals are recorded on the auxiliary recording medium of the first apparatus, control is performed on the basis of a synchronization signal obtained by reproducing the main recording medium of the first apparatus. Item 21. The recording / reproducing apparatus according to Item 21. 23. An internal reference clock signal of each device when recording the video and audio signals on the main recording medium of the second device and reproducing the video and audio signals from the first main recording medium. 22. The recording / reproducing apparatus according to claim 21, wherein 24. When the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed 1 / N times the normal reproduction speed, the main recording medium is reproduced at the normal reproduction speed. By the auxiliary recording medium control means, the obtained video and audio signals,
18. The recording / reproducing according to claim 17, wherein the video and audio signals of at least the original frame are output N times when the video and audio signals are once recorded in the auxiliary recording medium and read out from the auxiliary recording medium by the auxiliary recording medium control means. apparatus. 25. The video and audio signals are read from the auxiliary recording medium, and at least the video signal of the original frame is N
When outputting once, the first half frame is interpolated based on the video signal of the first field, the center frame is the video signal of the original frame, and the second half frame is based on the video signal of the second field. The recording / reproducing apparatus according to claim 24, wherein interpolation is performed. 26. When the video and audio signals obtained by reproducing from the main recording medium are recorded on the auxiliary recording medium, the video and audio signals are read from the auxiliary recording medium, and 1 / N speed reproduction is performed. The auxiliary recording medium control means records a predetermined amount of M video and audio signals on the auxiliary recording medium in a first period having a length M times the unit period, and the M video and audio signals. When the M video and audio signals recorded in the first period are read from the auxiliary recording medium after the recording, the M video and audio signals are read within a period of M × N times the unit period. When writing to the auxiliary recording medium after the sequential reading and recording of the M video and audio signals, the next predetermined amount of K video and audio signals is K times longer than the unit period. Request to write sequentially within the period you have 24 recording and reproducing apparatus according. 27. A video and audio signal obtained by reproducing from the main recording medium is recorded on the auxiliary recording medium, and the video and audio signals are read from the auxiliary recording medium to perform 1 / N speed reproduction. A predetermined amount of M video and audio signals are recorded in the auxiliary recording medium in a period having a length M times as long as a unit period, and after the recording of the M video and audio signals, the auxiliary recording medium is first recorded. Of the M video and audio signals recorded during the period of, are sequentially read out within a period of M × N times the unit period, and at least at the time when the recording and reproducing means completes the reproduction of the M video and audio signals. Under the control of the control means, the recording / reproducing means puts the reproduction of the main recording medium into the reproduction stopped state or the reproduction paused state, and when the video and audio signals are sequentially written, 25. The recording / reproducing means reproduces the main recording medium at a point before the time by which the main reproducing medium is reproduced by the recording / reproducing means to actually obtain a video and audio signal. Recording and reproducing device. 28. When the video and audio signals recorded on the main recording medium are reproduced at a reproduction speed N times the normal reproduction speed, the main recording medium is reproduced at the normal reproduction speed. The video and audio signals are temporarily recorded on the auxiliary recording medium by the auxiliary recording medium control means, and the video and audio signals are output at least every N frames when the video and audio signals are read from the auxiliary recording medium. 17. The recording / reproducing apparatus according to item 17. 29. When the video and audio signals are read from the auxiliary recording medium, the video and audio signals in at least N frames are evenly divided by N for two frames or more.
29. The recording / reproducing apparatus according to claim 28, wherein the recording / reproducing apparatus outputs the data for each frame.