JPH11328783A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain satisfactory recording by reproducing a recorded signal to detect the last track of a frame and setting the position of a leading track in accordance with the next recording mode at the time of performing consecutive recording in plural modes different by recording medium feeding speeds. SOLUTION: A system controller 189 controls a speed servo circuit 173 in accordance with a recording mode and temporarily rewinds the tape by a proper extent to reproduce the signal and detects the recording mode based on recorded information obtained from sub-code data. If this recording mode is equal to the recording mode for next recording, the target position of tracking is left as it is; but if it is different from the recording mode for next recording, a timing generator 177 is controlled to change the target position of tracking to a prescribed position by a pilot processing circuit 135. Thus, the trailing part of each track is taken as the target of tracking, and the last track of the frame is detected to start recording at the timing of the leading track of the next frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus, and more particularly, to an apparatus for recording a signal on a tape-shaped recording medium.

[0002]

2. Description of the Related Art As a device of this type, there is known a digital VTR which digitizes a video signal supplied from the outside and records it on a magnetic tape, and outputs a reproduced digital video signal to the outside. ing.

As a standard of such a consumer digital VTR, a DV format has recently been proposed by the HD Digital VCR Council.

In this DV format, in addition to the SD mode in which one frame of NTSC video signal and audio signal is recorded on ten tracks, the tape can be used without changing the data amount of the recording signal by 2/3 of the SD mode. The video and audio signals of one frame are conveyed at 10
LP mode to be recorded on a track or the data amount of a signal to be recorded is set to 1/2 of that in the SD mode, and the tape is transported at 1/2 the speed of the SD mode, and a video signal and an audio signal of one frame are transported. To record on 5 tracks
A mode has been proposed.

[0005]

Here, let's consider a case in which splicing is performed in the SDL mode on a tape on which a signal is recorded in the SD mode.

As described above, in the DV format, one frame of a video signal and an audio signal are recorded on ten tracks (in the SD mode), and are recorded on these ten tracks even during reproduction. Unless all signals are obtained, good reproduced images and sounds cannot be obtained.

[0007] Therefore, even in the case of performing the continuous shooting, it is desirable that the reproduction is performed up to the last track of each frame and the recording is started from the track at the beginning of the frame.

Therefore, as described above, when the splicing is performed in the SDL mode on a tape on which a signal is recorded in the SD mode, the tape is first conveyed at the conveying speed in the SD mode to be at the end of the frame. Immediately after a signal is reproduced from a track, it is conceivable to switch the transport speed of the tape and perform recording in the SDL mode from the track at the beginning of the next frame.

However, according to this method, the tape speed is not stable immediately after the tape transport speed is switched to the speed in the SDL mode, and a signal cannot be recorded in a good state.

[0010] The track inclination is different between the SD mode and the SDL mode. This is shown in FIG.

FIG. 12 shows a state of a track on the tape when the head is traced in the direction of the arrow T while the tape is being conveyed in the direction of the arrow A to perform the splicing photographing. The tracks recorded in the SD mode, and the left side is the track for which the splicing was performed in the SDL mode.

As described above, the track in the SD mode is more inclined than the track in the SDL mode. Therefore, when a track is formed without a gap at the head of the track and recording is started in the SDL mode, the hatched area in the drawing Will be overwritten and erased.

Therefore, even if the tape speed in the SD mode can be instantaneously changed from the tape speed in the SD mode to the tape speed in the SDL mode, the image signal and the audio signal for one frame immediately before the continuous shooting recorded in the SD mode are transferred. There is a problem that reproduction cannot be performed well.

An object of the present invention is to solve the above-mentioned problems.

Another object of the present invention is to record signals satisfactorily when recording signals in a plurality of modes having different recording medium conveyance speeds.

[0016]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the object, the present invention provides a method for recording a video signal between a first recording mode and a second recording mode having different transport speeds during recording. After the tape-shaped recording medium has been rewound from the recording start position for a predetermined period of time, the tape-shaped recording medium is conveyed, the video signal is reproduced, and the splicing is performed from the recording start position. An apparatus configured to determine a transport speed of the tape-shaped recording medium during reproduction before the start of the splicing shooting, according to a recording mode of a video signal to be recorded.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, each recording format in this embodiment will be described.

In this embodiment, a case will be described in which the present invention is applied to a digital VTR conforming to the above-mentioned DV format.

In the DV format, as described above, the SD
A format and an SDL format have been proposed. In the SD format, a video signal and an audio signal for one frame are recorded on ten tracks. In the long-time recording / reproducing mode called the SDL mode, the data amount of the signal to be recorded is reduced to half of that in the SD mode, and the signal of one frame is recorded on five tracks. The signal can be recorded.

In the SDL mode, the number of rotations of the head is SD
Since the recording is performed in the same manner as in the mode and the tape speed is set to half of that in the SD mode, the tracks formed on the tape have the same track pitch, but their inclinations are slightly different from those in the SD mode.

This situation will be described with reference to FIGS.

In the VTR of this embodiment, a magnetic tape is wound obliquely around a rotating drum, the drum is rotated in the same direction as the tape transport direction, and the head is scanned from the lower edge to the upper edge of the tape to record a signal. Playback is performed. In FIGS. 1 and 2, for the sake of explanation, the head scans from the bottom to the top in the drawing, and the tape is shown to be transported from left to right.

The vertical axis in FIGS. 1 and 2 indicates the rotation angle of the head.
The tape is wound from approximately 0 ° to 180 °, but valid data is recorded at 174 ° indicated by an arrow, and the tape is not wound from 180 ° to 360 °. This shows a state where the side is empty.

FIG. 3 shows the mounted state of the rotary head in this embodiment.

In FIG. 3, heads 1A and 1B are mounted with a phase difference of 180 ° from each other, and have different azimuth angles. Also, the head 2A is mounted at a position very close to the head 1B at almost the same height,
It has the same azimuth angle as the head 1A.

In the SD mode, the heads 1A and 1B
Are alternately used for recording and reproducing signals. That is, first, the head 1A starts tracing from the lower end of the tape, and separates from the tape when the rotation phase becomes 180 °. While the head 1A traces up to 180 °, the tape is transported 10 μm to the right in FIG. And at that time 180
The head 1B attached with a phase difference of 0 ° starts tracing from the 0 ° phase at the lower end of the tape, and the head 1B
After tracing to °, the head 1A starts tracing the tape again.

FIG. 4 is a diagram showing a state of an envelope of a reproduction signal and a head switch pulse (hereinafter, SWP) in the SD mode.

FIG. 4A shows the envelope of the reproduced signal. (B) SWP for instructing the head 1A, 1B to switch the trace, which is generated from a PG signal indicating the rotation phase of the rotating drum.

As described above, in the SD mode, the tape is alternately traced by the heads 1A and 1B, and a large number of helical tracks having different azimuth angles between adjacent tracks are formed on the tape at a track pitch of 10 μm to generate signals. At the same time as recording, the signal is reproduced from each track on the tape.

Next, in the SDL mode, the head 2
Recording and reproduction of signals are performed by using A and the head 1B alternately. That is, in the SDL mode, the head 2A
The tape is conveyed 5 μm to the right in FIG. When the head 2A further rotates by 360 °, the tape is further conveyed by 5 μm, and the head 1B starts tracing to record and reproduce signals.

FIG. 5 is a diagram showing the state of the envelope and SWP of the reproduced signal in the SDL mode.

FIG. 5B shows the envelope of the reproduced signal. (C) shows the state of SWP in the SDL mode. (A) shows the envelope of the reproduction signal in the SD mode.

As is clear from the drawing, a reproduced signal is completely obtained in the SDL mode as compared with the SD mode.
The SWP cycle is twice as long as that in the SD mode.

Next, the configuration and operation of a VTR to which the present invention is applied will be described.

FIG. 6 is a diagram showing the configuration of the digital VTR of the present embodiment.

First, the operation during signal reproduction in FIG. 6 will be described.

Signals reproduced from the tape T by the rotary heads 101, 103, and 105 are supplied to amplifiers 107 to 107, respectively.
It is output to 111. The outputs of the amplifiers 107 and 111 are output to the switch 115 via the switch 113.
The output of the amplifier 109 is output to the switch 115.

Here, the head 101 is the head 1A of FIG.
, And the head 103 corresponds to the head 1B in FIG.
The head 105 corresponds to the head 2A in FIG.

The switch 113 is the system controller 1
It is switched according to the mode by 89, connected to the amplifier 107 side in the SD mode, and connected to the amplifier 111 side in the SDL mode. The switch 115 switches according to the above-mentioned SWP.

The reproduced signal output from the switch 115 is supplied to the equalizer 119 via the switch 117. The switch 117 is switched by the system controller 189, and is connected to the P side during reproduction, and is connected to the R side during recording.

The equalizer 119 performs an integral equalization process for compensating for the high-frequency component attenuated with respect to the reproduction signal and the low-frequency component attenuated by the differential characteristics of magnetic recording / reproduction, and performs A / D conversion by the A / D converter 1.
21. The A / D converter 121 is the equalizer 11
9 is converted into a digital signal of a plurality of bits per sample (5 bits in this embodiment),
PR4 processing circuit 123, latch 131, and adder 133
Output to

The PR4 processing circuit 123 adds the input signal and a signal obtained by delaying the input signal by two clock periods to obtain a partial response class 4 signal for the reproduced signal.
And outputs it to the detection circuit 125. Detection circuit 1
Reference numeral 25 denotes a 1-bit 1-sample digital signal detected from the multi-valued digital signal output from the PR4 processing circuit 123 using a well-known Viterbi algorithm.
7 is output.

The processing circuit 127 performs a reproduction process on the reproduction signal from the detection circuit 125, and outputs an image and audio signal from a terminal 129.

More specifically, a synchronous signal and an ID signal are detected from the reproduced signal, and an error correction process is performed. The image signal is subjected to a decoding process corresponding to the encoding at the time of recording, and the information amount is further expanded and output. The audio signal is output after being subjected to deshuffling corresponding to shuffling at the time of recording. Further, necessary information is detected from the subcode and output to the system controller 189. Specifically, in this embodiment,
The mode information included in the subcode is detected and output to the system controller 189.

The adder 133 is an A / D converter 121
, And the signal delayed by one clock in the latch 131, and outputs the most significant bit of the addition result to the pilot processing circuits 135, 137, 141, and 143 and to the LPF 135.

The output of the LPF 135 is output to the equalizer 119 and the DC of the signal supplied to the A / D converter 121 is output.
It is configured to remove the offset.

Here, the pilot signal component for tracking in the present embodiment will be described.

In this embodiment, at the time of signal recording, 1-bit data is added to 24 bits of recording data to perform interleaved NRZI modulation, and the amount of pilot signal components contained in these 25 bits is reduced. The data to be recorded is determined so as to have a pilot signal component by determining a 1-bit code to be added accordingly.

FIG. 7 shows the spectrum of a signal recorded in this embodiment.

That is, FIG. 7A shows a signal in which the spectrum near the frequencies f1 and f2 is a dip, and FIG. 7B shows a signal having a peak in the frequency f1 and a dip near the frequency f1 and near the frequency f2. (C) is a signal having a peak at the frequency f2, and a dip in the vicinity thereof and in the vicinity of the frequency f1.

Here, the track on which the signal of FIG. 7A is recorded is the F0 track, the track on which the signal of FIG. 7B is recorded is the F1 track, and the track on which the signal of FIG. 7C is recorded is the F2 track. In other words, in this embodiment, F0-F1-
By recording the signals in the order of F0-F2-F0-F1,..., During reproduction, f in the reproduced signal leaking from both adjacent tracks when the F0 track is being reproduced.
A tracking error signal can be obtained based on the one component and the f2 component. By controlling the capstan motor based on the tracking error signal so that the f1 component and the f2 component have the same level, it is possible to maintain a good tracking state.

FIG. 8A shows the format of each track in the present embodiment, in which an ITI, an audio signal, a video signal, and a subcode signal are recorded in order from the beginning of the track. The hatched portion is a gap portion for absorbing discontinuity of data at the time of insert recording in each of the audio, video, and subcode areas.

The ITI is a signal for determining the recording start timing at the time of insert recording, and the data itself has the above-mentioned pilot signal component. Further, the above-mentioned pilot signal component is superimposed over the entire area from the gap portion following the ITI to the end of the track, and a tracking error signal can be obtained from the entire area of the track during reproduction.

Returning to FIG. 6, the latch 131 and the adder 133 apply 1 + D (D) to the reproduced signal having the binary eye pattern integrated and equalized by the equalizer 119.
Is a delay operator), multi-valued data having three levels is obtained.

Since the 1 + D processing is a low-pass characteristic, the above-described pilot signal component having a low frequency is included in the output of the adder 133, and if the DC offset of the A / D converter 121 is reliably removed, the A pilot signal component is superimposed on the most significant 1-bit digital data.

The 1-bit data having the pilot signal component is converted into pilot processing circuits 135, 137, and 14.
1, 143. These pilot processing circuits have the same configuration, and differ only in the frequency of the signal output from signal generation circuit 159.

That is, the signal generating circuit 159 outputs the sine component of the pilot signal of the frequency f1 to the pilot processing circuit 135, outputs the cosine component of the pilot signal of the frequency f1 to the pilot processing circuit 137, A sine component of frequency f2 is output to 141, and a cosine component of frequency f2 is output to pilot processing circuit 143.

In the pilot processing circuit 135, the multiplier 147 multiplies the 1-bit data output from the adder 133 by the sine component of the frequency f 1 from the signal generation circuit 159, and supplies the result to the switch 151 via the adder 149. Output. 0 is supplied to the other of the switches 151, and the switch 151 outputs a selection result to the latch 153. The output of the latch 153 is fed back to the adder 149, and the adder 149, the switch 151, and the latch 153 form an integrator. The switch 151 is a switch for clearing the integrator, and based on a timing signal from the timing generator 177, the adder 1
The output from 49 and 0 are selected and output to the latch. That is, the integration operation is performed while the switch 151 is connected to the adder 149 side, and the integration operation is not performed in other periods. Therefore, by controlling the timing signal (window) for the switch 151, It is possible to arbitrarily change the integration period.

The output of the latch 153 is
5 is output to the latch 157 through the switch 1
55 selects an output from the latch 153 according to the timing signal from the timing generator 177 and outputs the selected output to the latch 157.

In this embodiment, a timing signal is generated so that the output of the latch 153 is selected at the timing when the integration period by the switch 151 ends, and the output of the latch 157 is selected during the other periods. This switch 155
Can be changed by the timing generator 177 similarly to the tracking signal of the switch 151.

As described above, the pilot processing circuit 135
Detects the correlation between the 1-bit data from the adder 133 input during the integration period designated by the timing generator 177 and the sine component of the frequency f1 from the signal generation circuit, and as a result, outputs the output of the latch 157 to the RMS (R
oot Mean Square) circuit 139.

Each pilot processing circuit 137 similarly detects the correlation between the 1-bit data from the adder 133 and the cosine component of the frequency f1 and outputs the same to the RMS circuit 139. Similarly, each of the pilot processing circuits 141 and 143 also receives 1-bit data from the adder 133,
The correlation between the sine component and the cosine component of the frequency f2 is detected and output to the RMS circuit 145.

The RMS circuit 139 outputs the supplied frequency f
The signal indicating the correlation value between the sine component and the cosine component is squared and added, and the square root thereof is calculated, thereby obtaining a pilot signal of frequency f1 superimposed on the most significant 1-bit data of the output of the adder 133. The magnitude of the component is calculated and supplied to the switch 161A.

Similarly, the RMS circuit 145 squares the signals indicating the correlation values for the sine component and the cosine component of the frequency f2 from the pilot processing circuits 141 and 143, and then adds the squared signals. Vessel 1
The magnitude of the pilot signal component of frequency f2 superimposed on the most significant 1-bit data of the output of 33 is calculated and supplied to the switch 161B.

The switches 161A and 161B are switched according to the output of the timing generator 177.

That is, the system controller 189 controls the timing generator 177 according to the reproduction mode information output from the processing circuit 127. In the case of the SD mode during reproduction, the system controller 189 controls the switches 161A and 161B as shown in FIG. The control signal shown in FIG.
A, 161B are switched. Here, each switch is connected to the terminal on the a side while the control signal in FIG. 4C is at the high level, and each switch is connected to the terminal on the b side during the low level. This is because the polarity of the pilot signal leaking from the adjacent F1 and F2 tracks when the F0 track is reproduced is inverted every other track.

In the case of the SDL mode at the time of reproduction, a control signal shown in FIG. 5D is output to the switches 161A and 161B to switch the switches 161A and 161B, respectively. As is clear from FIGS. 4C and 5D, the switches 161A and 161B are switched at twice the cycle in the SDL mode as in the SD mode.

The outputs of the switches 161A and 161B are output to a subtractor 163, where the difference between the signals is obtained. The output of the subtracter 163 is output to the adder 167 via the loop filter 165 as a tracking error signal.

The speed servo circuit 173 generates a speed error signal of the capstan rotation speed (tape transport speed) with respect to the target speed based on the capstan FG signal obtained from the capstan motor, and outputs it to the adder 167. The adder 167 adds the tracking error signal from the loop filter and the speed error signal from the speed servo circuit and outputs the result to the driver 169. Capstan driver 1
Reference numeral 69 controls the rotation speed of the capstan based on the control signal from the adder 167. In this embodiment, the tape transport speed can be arbitrarily changed by changing the target speed of the speed servo circuit 173 by the system controller 189.

Next, the operation of the recording system of the VTR shown in FIG. 6 will be described.

The video and audio signals input from the terminal 179 are stored in the memory 181. Then, the compression circuit 18
Reference numeral 3 compresses and encodes the information amount of the video signal. The audio signal is subjected to shuffling processing and output to the recording processing circuit 185. The recording processing circuit 185 includes the compression circuit 18
3 for the video signal and the audio signal from
Error correction encoding is performed while adding D data, and further, synchronization and ID are added to the subcode data from the subcode generation circuit 187 to perform error correction encoding. Then, the digital signal is subjected to digital modulation processing as described above to superimpose a pilot signal component, and output to the switch 117.

The switch 117 is the system controller 1
89, the recording processing circuit 1 is connected to the R side during recording.
85 from the switch 11 via the switch 115
3 and to the amplifier 109.

The system controller 189 operates the operation unit 18.
When the SD mode is set at the time of recording by the switch 7, the switch 113 is connected to the amplifier 107 side, and each signal is recorded using the heads 101 and 103 as described above. Further, a control signal is outputted to the speed servo circuit 173 so as to convey the tape at the speed in the SD mode.

When the SDL mode is set, the switch 113 is connected to the amplifier 111, and each signal is recorded by using the head 103 and the head 105 as described above. Further, a control signal is output to the speed servo circuit 173 so as to convey the tape at the speed in the SDL mode.

Now, in such a VTR of FIG.
The control of the system controller 189 when performing the splicing shooting will be described with reference to the flowchart in FIG.

First, as a preparation for the connection shooting, when the power is turned on from the operation unit 187 by the user's operation, or when the recording trigger switch is operated during recording to be in a recording pause (hereinafter, recording pause) state, the speed is changed. By controlling the servo circuit 173, the tape is rewound for a predetermined period, and a recording pause state is set at that position.

In this state, when there is a recording start instruction from the operation unit 187, the system controller first detects whether the recording mode set by the operation unit 187 is the SDL mode (step S901). If the mode is the SDL mode, the speed servo circuit 173 is controlled to convey the tape at the speed in the SDL mode (step S903), and a signal is reproduced from the tape. Further, the timing generator 177 is controlled so that the tracking target position is set as shown in FIG.
A control signal is output to the switch 151 of the pilot processing circuit 135 so as to be at the position S shown in FIG.

As described above, the switch 151 is connected to the adder 1
The adder 1 is controlled by controlling the timing of connection to the 49 side.
The period during which the 1-bit data from 33, the pilot signal component, and the multiplication result are integrated can be controlled. Therefore, a tracking error signal at the position S can be obtained by setting the integration period at the head portion S of the track as shown in FIG. 8B, for example. As a result, the tracking target position is set at the position S. be able to.

As described above, after the tape is conveyed at the tape speed in the SDL mode and the reproduction of the signal is started with the position S as the tracking target position, based on the recording mode information obtained from the subcode data in the reproduction data, Then, it is detected whether the recording mode of the reproduced data is the SD mode (step S907).

In the case of the SD mode, if recording is started with the position S on the track as a tracking target as it is, a part of the last track of the frame is erased as shown in FIG. 177 is controlled so that the tracking target position is
A control signal is output to the switch 151 of the pilot processing circuit 135 so as to be at the position E shown in (c) (step S909).

As a result, the end of each track becomes a tracking target. In this state, the last track of the frame is detected (step S911), and recording is started at the timing of the first track of the next frame (step S9).
13).

If the recording mode of the reproduction data is the SDL mode in step S907, the last track of the frame is detected and recording is started with the tracking target position kept at the position S.

If the recording mode set by the operation unit 187 in step S901 is the SD mode,
The tape is transported at the speed in the SD mode (step S9).
15) The signal is reproduced from the tape with the tracking target position as the position S (step S917). Then, similarly, the last track of the frame is detected, and recording is started.

As described above, in the present embodiment, when the splicing shooting is performed, if the recording mode set by the user is the SDL mode, the tape is transported in advance at the speed of the SDL mode to reproduce the signal. Since the last track of the frame is detected and recording is started from the first track of the next frame, for example, when a spliced image is taken in a portion where a signal is recorded in the SD mode in the SDL mode, the tape speed varies. The disturbance of the recording data can be eliminated.

In this case, by setting the tracking target position near the end of the track, the last track of the signal recorded in the SD mode by the splicing photographing is not erased as shown in FIG. Tracks can be formed without gaps in the shooting portion.

Similarly, when the recording mode set by the user is the SD mode, the tape is transported in advance at the speed of the SD mode to reproduce the signal, the last track of the frame is detected, and the next frame is detected. Since the recording is started from the beginning, for example, even in the case where the splicing shooting is performed in the SD mode on the portion where the signal is recorded in the SDL mode, the disturbance of the recording data due to the fluctuation of the tape speed can be eliminated.

In this case, by setting the tracking target position near the head of the track, the track can be formed without any gap at the joint photographing portion as shown in FIG.

[0089]

As described above, according to the present invention, according to the designated recording mode and the recording mode of the reproduction signal,
Since the tracking target position before the start of recording is changed, the track immediately before the start of recording is not erased.

Further, in another invention of the present application, the tape transport speed at the time of reproduction during the splicing shooting is controlled in accordance with the designated recording mode, so that the recording data accompanying the change of the tape speed at the time of splicing shooting is controlled. Can be eliminated.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state of a track on a tape in an SD mode.

FIG. 2 is a diagram showing a state of a track on a tape in an SDL mode.

FIG. 3 is a diagram showing a configuration of a head used in an embodiment of the present invention.

FIG. 4 is a diagram showing recording / reproducing timing in the SD mode according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating recording / reproducing timing in an SDL mode according to the embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a digital VTR to which the present invention is applied.

FIG. 7 is a diagram showing a frequency spectrum of a signal recorded by the device of FIG. 6;

8 is a diagram for explaining an operation of changing the tracking target position by the device of FIG. 6;

FIG. 9 is a flowchart for explaining the operation of the apparatus of FIG. 6 at the time of splicing shooting.

FIG. 10 is a diagram showing a tape format at the time of splicing by the apparatus of FIG. 6;

FIG. 11 is a diagram showing a tape format at the time of splicing by the apparatus of FIG. 6;

FIG. 12 is a diagram showing a conventional tape format at the time of splicing.

Claims (16)

[Claims] 1. A first recording mode in which a tape-shaped recording medium is conveyed at a first speed and a plurality of helical tracks are formed on the tape-shaped recording medium to record a signal. A tape-shaped recording medium on which signals are recorded in a second recording mode for conveying the tape-shaped recording medium at a slow second speed and forming a number of helical tracks on the tape-shaped recording medium to record signals A reproducing means for tracing a helical track on the tape-shaped recording medium with a rotating head to reproduce the signal, and a tracking error using the signal reproduced by the reproducing means. Generating means for generating a signal; conveying means for controlling a conveying operation of the tape-shaped recording medium according to the tracking error signal; and the tape-shaped recording medium Recording means for recording a signal thereon, instructing means for instructing a recording mode, detecting a recording mode of the signal reproduced by the reproducing means, and reproducing from a helical track before a recording start point by the recording means. And a control unit for controlling the generation unit to change a tracking target position in each of the helical tracks according to the recording mode of the signal and the recording mode instructed by the instruction unit. 2. The recording apparatus according to claim 1, wherein a track pitch in the first recording mode and a track pitch in the second recording mode are the same. 3. The control unit controls the generation unit to change the tracking target position between a first position near a start end of the track and a second position near an end of the track. The recording device according to claim 1, wherein the recording device is controlled. 4. The method according to claim 1, wherein the control unit sets the target position of the tracking to the first position when a recording mode instructed by the instruction unit is the first recording mode. The recording device according to claim 3. 5. The control unit according to claim 1, wherein a recording mode designated by said instruction unit is said second recording mode, and said detected recording mode is said first recording mode. 4. The recording apparatus according to claim 3, wherein the tracking target position is set to the second position. 6. The control unit according to claim 1, wherein a recording mode designated by said instruction unit is said second recording mode, and said detected recording mode is said first recording mode. 4. The recording apparatus according to claim 3, wherein the tracking target position is set to the first position. 7. The recording apparatus according to claim 1, wherein the rotation speed of the rotary head is substantially the same in the first recording mode and the second recording mode. 8. The generating means includes: multiplying means for multiplying the reproduced signal by n kinds of pilot signals having different frequencies from each other; and integrating means for integrating an output of the multiplying means. 2. The recording apparatus according to claim 1, wherein a target position of the tracking is changed by changing an integration period of the integration means. 9. The signal includes video data, audio data, and subcode data, and the control unit detects a recording mode of the reproduction signal based on subcode data in the reproduction signal. The recording device according to claim 1. 10. The recording apparatus according to claim 1, wherein the signal includes video data, and records one frame of video data on the plurality of helical tracks. 11. The control unit further controls the recording unit so as to start recording from a track next to a last track of a plurality of tracks on which the one frame of video data is recorded. The recording device according to claim 1. 12. The control unit further sets a transport speed of the tape-shaped recording medium before the recording unit starts recording the signal according to a recording mode instructed by the instruction unit. The recording device according to claim 1. 13. A first recording mode in which a tape-shaped recording medium is conveyed at a first speed and a plurality of helical tracks are formed on the tape-shaped recording medium to record signals.
Signals are recorded in a second recording mode in which the tape-shaped recording medium is conveyed at a second speed lower than the first speed and a plurality of helical tracks are formed on the tape-shaped recording medium to record signals. A recording unit for recording a signal on a tape-shaped recording medium, wherein the reproducing unit traces a helical track on the tape-shaped recording medium with a rotary head to reproduce the signal, and transports the tape-shaped recording medium. Conveying means for controlling an operation; recording means for recording a signal on the tape-shaped recording medium; instruction means for instructing a recording mode; and the signal by the recording means according to the recording mode instructed by the instruction means. And a control unit for setting a transport speed of the tape-shaped recording medium before the start of recording. 14. The recording apparatus according to claim 13, wherein the signal includes video data, and the video data of one frame is recorded on the plurality of helical tracks. 15. The recording device according to claim 13, wherein the control unit further controls the recording unit to start recording from a track next to a last track of the plurality of tracks on which the one frame of video data is recorded. The recording device according to claim 1. 16. A tape-shaped recording medium on which a video signal is recorded in a first recording mode and a second recording mode having different transport speeds during recording from each other for a predetermined period from a recording start position. After rewinding the tape-shaped recording medium to reproduce the video signal and perform a splicing shooting from the recording start position, wherein the splicing is performed in accordance with a recording mode of a video signal to be recorded from now on. A recording apparatus for determining a transport speed of the tape-shaped recording medium at the time of reproduction before starting shooting.