JP2643177B2 - Information signal recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information signal recording device, and more particularly to a helical scan type information signal recording device.

[Summary of the Invention]

According to the present invention, the magnetic tape runs obliquely at a constant speed over a predetermined range with respect to the rotating peripheral surface of the rotary magnetic head, and an information signal is supplied to the rotary magnetic head for a predetermined time, and the information signal is obliquely applied to the magnetic tape. In a helical scan type information signal recording device in which an index section is provided at a position where an information signal is not recorded on a magnetic track while being sequentially recorded as a magnetic track,
An index signal forming means for forming an index signal recorded in an index section of the magnetic track, and a PLL
A clock run signal forming means for forming a follow-up clock run signal longer after recording an index signal than when recording an ordinary information signal, and a connection for continuously combining a clock run signal and an index signal to form an after-recording signal. Means and a post-recording signal, from within a postamble section preceding the index section during post-recording,
Output control means for controlling the information signal of the magnetic track to be output toward the start end of the recording area portion. Therefore, even when the PCM audio data, postamble, and the like are erased, the overwriting of the clock run signal, that is, so-called after recording is performed over a longer section than before, and the index signal of the predetermined section is subsequently added. By performing the recording, it is possible to improve the following performance of the clock formed by the PLL at the time of reading the clock run signal with respect to the reproduced data, and as a result, it is possible to accurately read the index signal and various signals without error. .

[Conventional technology]

The track format of an 8-mm video magnetic tape is defined as shown in FIG.

That is, in the figure, reference numeral 1 denotes a magnetic tape, and 2 denotes a magnetic track. The magnetic track 2 is oblique to the tape 1 by two rotating magnetic heads having an angular interval of 180 ° from each other, and The rotating magnetic head is formed or scanned to a length corresponding to a rotation angle of 221 °. A section 2S corresponding to a rotation angle of 36 ° of the rotary magnetic head from the tip of the magnetic track 2 is used for audio signals, and a section 2V corresponding to the remaining 185 ° rotation angle is used for video signals.

Then, the audio track 2S is divided into sections 21 with the distribution shown in the figure.
The section 21 is a scanning start section of the rotary head (head entry section), the section 22 is a preamble section in which clock run-in is recorded and reproduced, and the section 23 is a PCM audio data section in which a PCM audio signal is recorded and reproduced. The section 24 is a post-margin section for a back margin during after-recording (hereinafter abbreviated as after-recording), and the section 25 is a guard section for the tracks 2S and 2V.

Further, in this case, the PCM audio data in the section 23 is obtained by converting the stereo audio signal for one field period into the time axis compressed and PCM audio data.
The signal is converted into a signal having an error correction code and an ID code. The signals in the sections 22 to 24 are 2.9 MHz when the value is “0”, and 5.
It is recorded after being converted to an 8 MHz bi-phase mark signal.

In addition, the video track 2V is 180
It is divided into a section 28 corresponding to the rotation angle of ゜ and a section 29 corresponding to the remaining rotation angle of 5 °. In a section 28, one field of a frequency multiplexed signal of an FM signal modulated by a luminance signal, a carrier chrominance signal subjected to low-frequency conversion, an FM signal modulated by a monaural audio signal, and a pilot signal is recorded and reproduced. Is done. Section 29 is a scanning end section of the rotary head (head separation section).

According to such a format, the audio data section 23
Since the ID code is recorded at the same time as the audio signal,
Various data such as recording date, absolute position, program number and the like can be recorded as an ID code, which is very convenient for cueing or editing during reproduction.

Incidentally, when the ID code is recorded in the audio data section 23, it is dispersed and recorded in the section 23 by interleaving together with the PCM audio data. Therefore, in order to correctly reproduce the ID code, it is necessary to correctly scan the rotating head section 23 over a considerable length.

However, at the time of search reproduction, the magnetic head 1 runs at, for example, 30 times the speed at the time of recording.
Are scanned obliquely, and therefore, during search reproduction, the ID code may not be correctly reproduced for a considerable period of time.

Therefore, the ID is added to the postamble section 24 of the audio track 25.
Recording and reproducing an index signal such as a code has been considered.

That is, this section 24 has a length corresponding to 2.06 ° of the rotary head, but when this is converted into the length of time, 180 ° of the rotation angle is equal to 262.5H (1H is one horizontal period). The time length of section 24 is Becomes

Thus, for example, as shown in FIGS. 8A and 8B, the section 24 is divided into the first half 1.5H section 241 and the remaining second half 1.5H section 242. Then, as shown in FIG.
And the section 242 is an index section. This section 242 is all “1” in the section 0.5H from the tip
The clock-run signal S _CL is recorded and the index signal CDIX recorded in the segment of the remaining 1H.

The index signal CDIX is divided equally into blocks BLK1 to BLK6 and end marks as shown in FIG. D, and further divided into blocks as shown in FIG.
BLK1 to BLK6 are 3-bit header and 8-bit ID code
ID0 to ID4 and an 8-bit CRC code for them.

In this case, the blocks BLK1 to BLK6 are the modes 1 to which the ID codes ID0 to ID4 recorded in the PCM audio data section 23 belong.
Corresponding to the mode 6, the ID codes ID0 to ID4 are the same as the ID codes ID0 to ID4 recorded in the section 23, the absolute position on the magnetic tape 1, the cassette number of each cassette of the recorded contents, the recording It is a signal of the date, hour, minute, second, etc. performed.

Similarly to the signal in the audio track 2S, the index signal CDIX in the index section 242 is recorded after being converted into a bi-phase mark signal of 2.9 MHz when "0" and 5.8 MHz when "1".

According to the recording format of the index signal CDIX, the rotary head obliquely crosses the track 2 at the time of variable-speed reproduction. However, since the index section 242 is as short as 1.5 horizontal sections, for example, even at the time of search reproduction at 30 × speed. The rotating head will track and operate substantially correctly for the index section 242, and the index signal CDIX
(ID code) can be reliably reproduced.

Further, since the meaning of the ID code differs depending on the modes 1 to 6, when using the ID code recorded together with the PCM audio data in the section 23, six tracks must be reproduced. Requires a field period,
According to the above format, one index section
Since the ID codes of all the modes 1 to 6 are recorded in the index 242 as the index signal CDIX, it is only necessary to reproduce one horizontal section of the section 242, and the necessary ID code can be obtained immediately.

Furthermore, after the recording of the video signal and the audio signal, only the index signal CDIX can be recorded alone, and for example, a chapter signal or the like can be added to the edited magnetic tape 1.

[Problems to be solved by the invention]

When dubbing into the index section 242 recorded in the format as described above, usually, the address recorded in the PCM audio data section 23 is decoded to generate the index section 242, and overwriting is performed in that section.

By the way, a camera-integrated VTR that does not record PCM audio data on the magnetic tape 1, a so-called camcorder (CAM Code)
When recording is performed using r), as shown in FIG.
Voice data section 23, of the recording area, such as a postamble 24, data of the section A _ER of approximately about 7H video signal interval 28 closer is erased.

In such a case, if the post-recording of the index section 242 is performed on the magnetic tape 1 as described above, as shown in FIGS. 9B and 9C, a signal near the video signal 28 in the above-described section _AER is _generated . [Clock run signal S _CL (0.5H) and index signal CDIX (1H)] are recorded.

When playback is performed in this state, the head (not shown) _moves the index section 242 from the section A _ER where data is erased.
Clock run signal _SCL . However, since this section is extremely short at 0.5H, it is difficult to accurately synchronize (lock-in) the phases of the clock and the reproduced data with the PLL within this section.

For this reason, there is a problem that a reading error of various data including the index signal CDIX may occur, and an improvement thereof has been desired.

Accordingly, an object of the present invention is to extend the section in which the clock run signal is recorded to the postamble 241 side, thereby improving the ability of the clock formed by the PLL to follow the reproduced data, thereby improving the clock and reproduced data. It is an object of the present invention to provide an information signal recording device capable of synchronizing the phase of the information signal more accurately, preventing a reading error, and reading the data accurately.

[Means for solving the problem]

According to the present invention, the magnetic tape runs obliquely at a constant speed over a predetermined range with respect to the rotating peripheral surface of the rotary magnetic head, and an information signal is supplied to the rotary magnetic head for a predetermined time, and the magnetic tape is tilted on the magnetic tape. In a helical scan type information signal recording device in which an index section is provided at a position where an information signal is not recorded in a magnetic track while being sequentially recorded as a magnetic track, an index recorded in an index section of the magnetic track Index signal forming means for forming a signal, clock run signal forming means for forming a clock running signal for PLL tracking longer than during recording of an ordinary information signal during post-recording of the index signal, and a clock run signal and an index signal. Combining means for continuously combining the signals to form an after-recording signal; And an output control means for controlling output from within the postamble section preceding the index section at the time of post-recording to the start end of the recording area portion of the magnetic track information signal. Recording device.

[Action]

When a mode signal for dubbing the clock run signal and the index signal is added to the section from the postamble section to the recording area of the video signal, a clock run signal is output from the preamble forming circuit over a section of 1.5H, and subsequently, An index signal is output from the controller for a period of 1H.

The clock run signal and the index signal are generated in a continuous state and supplied to the encoder 85. After being modulated into a bi-phase mark signal by the encoder, it is recorded over 2.5H in the above-mentioned section.

Therefore, a clock run signal of 1.5H is always recorded, and the followability of the PLL when reproducing the index signal is improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. This description is made in the following order.

(A) Outline of VTR configuration and general records in VTR
Circuit operation during reproduction (b) Recording / reproduction of clock run signal and index signal from within the postamble section to the beginning of the video signal area (a) Outline of VTR configuration and general recording in VTR・
FIG. 1 shows a VTR as an information signal recording device.
In FIG. 1, reference numeral 55 denotes a system controller (hereinafter abbreviated as syscon) for controlling the operation of the VTR,
When a mode switch 56 such as a recording switch or a reproduction switch connected thereto is operated, the VTR is controlled by the system controller 55 to an operation mode corresponding to the operated mode switch 56.

Reference numerals 34A and 34B denote rotating magnetic heads (hereinafter, simply referred to as heads) .The heads 34A and 34B have an angular interval of 180 ° from each other, and are rotated at a frame frequency by a motor 62 through a rotating shaft 61. At the same time, the magnetic tape 1 runs obliquely at a constant speed over an angular range of about 221 ° with respect to the rotational frequency plane. In this case, although not shown, the rotation phases of the heads 34A and 34B are servo-controlled so as to synchronize with the video signal to be recorded at the time of recording and to correctly scan the magnetic track 2 at the time of reproduction.

Accordingly, as shown in FIG. 2A, in every other field period Ta, the head 34A scans the section 2S during the first 1/5 field period of the period Ta, and thereafter scans the magnetic track 2A.
Is scanned in the section 28. Also every other field period
At Tb, the head 34B scans the section 2S in the first / 5 field period of the period Tb, and thereafter scans the section 28 of the magnetic track 2.

At the time of general recording, the color video signal _Sc and the monaural audio signal Sm are supplied to the recording processing circuit 31, and the above-described FM luminance signal, the low-frequency-converted carrier color signal, the FM audio signal, and the pilot The frequency multiplexed signal Sf with the signal is continuously extracted as shown in FIG. 2B, and this signal Sf is supplied to the switch circuit 32.

Further, for example, a pulse generating means 63 is provided on the rotating shaft 61, and a pulse Pg of a frame cycle indicating the rotational phase of the heads 34A, 34B is taken out for each rotation of the heads 34A, 34B. The pulse Pg is supplied to the signal forming circuit 65 through the shaping amplifier 64, and a rectangular wave signal Sw that is inverted for each of the periods Ta and Tb is extracted as shown in FIG. It is supplied as a control signal. Switch circuit 32
The state is switched to the state opposite to the state shown in the figure by Ta and Tb. Accordingly, the signals Sf and Sl are alternately extracted from the switch circuit 32 for each of the periods Ta and Tb as shown in FIG.

Then, the signals Sf, Sf pass through the recording amplifiers 33A, 33B,
Further, it is supplied to the heads 34A and 34B through the recording side contact R of the switch circuits 67A and 67B. Therefore, the signals Sf, Sf are sequentially recorded on the tape 1 as the video signal sections 28, 28 for each of the periods Ta, Tb.

Further, the stereo audio signals L and R are supplied to the recording processing circuit 41, and the signal Sw is supplied to the formation circuit 66 so that the second
As shown in FIG.
During the period when A and 34B are scanning sections 22 and 23, a pulse Ps that becomes “H” level is formed, and this pulse Ps is supplied to the recording processing circuit 41 and, as shown in FIG. The minute signals L and R are time-axis-compressed and converted into PCM signals during the period of Ps = “H”, and after the preamble signal of the section 22 is added, the signals are converted into the bi-phase mark signal Ss and extracted.

Then, this signal Ss is supplied to the head 34B [through the signal line of the contact R of the OR circuit 42 → the switch circuit 32 → the recording amplifier 33B → the switch circuit 67B] during the field period Ta, and the [OR circuit 42 → switch circuit 32 → recording amplifier 33A → switch circuit 67A via the signal line of the contact R) to the head 34A. Therefore, on the magnetic track 2, the signal Ss, that is, the preamble signal and the PCM audio data are recorded in the sections 22 and 23 before the signal Sf is recorded in the video signal section 28.

Further, the index signal CDIX is supplied from the controller 52 which manages the index signal CDIX to the recording processing circuit 51, and the forming circuit 66 generates a rising point of the pulse Ps (or a signal PIX).
A pulse Pi that goes to the “H” level is formed in a 1.5 horizontal period in which the heads 34A and 34B scan the section 242 with reference to the Sw change point), and this pulse Pi is supplied to the recording processing circuit 51 and as shown in FIG H, Pi = clock run signal during the period of "H" S _CL and index signal CDIX is taken out it is converted into a bi-phase mark signal Si.

Then, this signal Si is supplied to the head 34B [through the signal line of the contact R of the OR circuit 42 → the switch circuit 32 → the recording amplifier 33B → the switch circuit 67B] during the field period Ta, and during the field period Tb, OR circuit 42 → switch circuit 32 → recording amplifier 33A → switch circuit 67A via the signal line of contact R) to the head 34A. Therefore, the magnetic track 2 includes the signal S in the PCM audio data section 23.
s signal followed by sections 242 to recorded Si, i.e., a clock run signal S _CL and index signal CDIX is recorded.

On the other hand, at the time of reproduction, the signals Ss, Si and the signal Sf are alternately reproduced from the magnetic track 2 by the heads 34A and 34B as shown in FIG. 2, and the reproduced signals Ss, Si and Sf are switched by the switch circuit 67A. , 67B, and further through the reproduction amplifiers 35A, 35B to the switch circuit 36, the signal Sw is supplied to the switch circuit 36 as its control signal, and the signal Sf is continuously output from the switch circuit 36. At the same time, the signals Ss and Si are taken out for each field period.

The signal Sf from the switch circuit 36 is
The original color video signal Sc and monaural audio signal Sm supplied to 37 are extracted.

Further, the signals Ss and Si from the switch circuit 36 are supplied to the reproduction processing circuit 43, and the pulse Ps is supplied to the reproduction processing circuit 43 as a window signal so that the original stereo audio signals L and R are extracted from the signal Ss. It is.

Further, the signals Ss and Si from the switch circuit 36 are supplied to the reproduction processing circuit 53, and the index signal CDIX is extracted from the signal Si.
Supplied to 52 and used for cueing.

The above is the outline of the configuration of the VTR and the circuit operation at the time of general recording / reproduction.

(B) Recording / reproducing of clock run signal and index signal from within postamble section to start end of video signal area portion FIG. 3 shows an example of recording processing circuit 51 and reproduction processing circuit 53. The part indicated by a chain line is made into a one-chip IC.

That is, in the figure, 45 indicates a clock forming circuit,
The clock thus formed is supplied to the recording processing circuit 41 and the reproduction processing circuit 43, and also to the recording processing circuit 51 and the reproduction processing circuit 53. Reference numeral 90 denotes a control signal forming circuit. In the control signal forming circuit 90, various control signals are formed at a predetermined timing with reference to the pulse Pi, and these control signals and the clock of the clock forming circuit 45 are converted into respective circuits. Supplied to

During recording, the index signal CDIX is output from the controller 52 during a period in which the heads 34A and 34B are not scanning the section 242, and the index signal CDIX is supplied to the buffer RAM 71 through the switch circuit 72, and the address A signal is supplied from the address forming circuit 73 to the RAM 71 through the switch circuit 74, and therefore, the index signal CDIX to be recorded is stored in the RAM 71.

The clock run signal S _CL from the postamble interval 241 over the video signal 28 side, when recording the index signal CDIX, including the recording of the clock run signal S _CL before reaching the starting end of the head 34A, 34B interval 242 Control signal output from the control signal forming circuit 90
From the time S _T is set to "H", the clock-run signal S _CL from the preamble generating circuit 81 is output over 1.5 H.

A signal in a mode in which the post-recording signal S _AF [clock run signal S _CL and index signal CDIX] is overwritten from the postamble 241 to the index section 242 (hereinafter, the post-recording mode selection signal) is a signal combining circuit 95 shown in FIG.
This after-recording mode selection signal controls the switch circuits 97 and 98. That is, in the switch circuit 97, the terminals 97a and 97b are connected, and in the switch circuit 98, the terminals 98a and 98b are connected by the after-recording mode selection signal. The switch circuit 97 includes terminals 97a and 9
The connection 7b, the output continuation time as the control signal S _T
2.5H [Fig. 5B] is selected. By applying this output to the switch circuit 99, the operation period of the switch circuit 99 (the output time from the OR circuit 100) is set to 2.5H.

Further, the switch circuit 98, the after-recording mode selection signal, a clock run signal S _CL of all "1" from the preamble generating circuit 81 is output continuously over 1.5H Fifth FIG C], the clock run signal S _CL Is added to the OR circuit 100.

In the OR circuit 100, the above-mentioned clock run signal S _CL [1.5H]
Then, the index signal CDIX [1H] is supplied from the OR circuit 100, as shown in FIG. 5D, the clock run signal S _CL [1.5H] and the index signal CDIX [1H].
H] is generated, and an after-recording signal S _AF [2.5H] in a state where H!

The clock run signal _SCL generated in this way is
The signal is supplied to the encoder 85 via the switch circuit 99 and is encoded into the bi-phase mark signal Si. This signal Si is output to the OR circuit 42.

Next, the head 34A, the 34B passes 1.5H of the recorded segment of the clock-run signal S _CL, the index signal CDIX is read is supplied with the address signal to the RAM71 through the switch circuit 74 from the address generating circuit 73, The index signal CDIX is supplied to the register 83 through the switch circuit 72, and is converted from a parallel signal to a serial signal.The serialized index signal CDIX is supplied to the CRCC forming circuit 84, where a CRC code is added. the added index signal CDIX is converted into the aforementioned clock run signal S _CL followed by being supplied to the encoder 85 signals Si of the signal Si is outputted to the clock run S _CL same OR circuit 42.

Under this post-recording mode selection signal, FIG.
As shown by, the recording mode REC that periodically becomes “H” level during the reproduction mode PB is set, and the period of this recording mode REC matches the operation period [2.5H] of the switch circuit 99. It is possible to record the clock-run signal S _CL and index signal CDIX only in the period.

Therefore, the index signal CDIX and the clock run signal
Dubbing is possible duration of S _CL is 2.5H of the section 243 as shown in FIG. 5 D. This 2.5H period is, as shown in FIG. 5D, the start end 101 provided in the postamble 241.
Index signal CDIX is disposed in a clock-run signal S _CL and remain period 1H of all "1" during the period of 1.5H from.

Therefore, the clock run signal S _CL starts from the starting end 101 of the section 243.
Then, the index signal CDIX is recorded.

On the other hand, in a mode in which a video signal, a PCM audio signal, an index signal, and the like are all recorded, a recording mode selection signal is added. In response to the recording mode selection signal, the control signal S output from the control signal forming circuit 90 through the switch circuit 97 is output.
The duration of _T is set to 1.5H (FIG. 6B), whereby the operation period of the switch circuit 99 is set to 1.5H. Also,
A clock run signal output from the preamble forming circuit 81 according to the recording mode selection signal from the switch circuit 98.
S _CL is continuously output over 0.5H [Figure 6 C].

Note that this video signal, PCM audio signal, the mode for recording all Index signals, etc., because it is the aforementioned recording mode REC always "H" level, the period capable of recording clock run signal S _CL and index signal CDIX Is substantially set to the period [1.5H] during which the switch circuit 99 is operating. Accordingly, the period in which the clock run signal and the index signal can be recorded is a period from the postamble 241 to 1.5H.

The recording signal output from the signal combination circuit 95 in FIG. 4 is all "1" by the OR circuit 100 during a period of 0.5H from the start end.
Index signal CDIX is generated disposed period of clock run signal S _CL and remains 1H. Incidentally, the transmission and recording of subsequent clock run signal S _CL and index signal CDIX, is the same nearly a mode for dubbing only above index section, without redundant description.

On the other hand, at the time of reproduction, the head 34A, since the clock run signal S _CL to be read from 34B is recorded over a long period of 1.5H with respect to conventional 0.5H, followability of the PLL is greatly improved. Therefore, the phase of the clock and the phase of the reproduced data are completely synchronized (locked in), and the reading of various data including the index signal CDIX can be accurately performed.

 The circuit operation during reproduction is as follows.

The signals Ss and Si from the switch circuit 36 are supplied to a decoder 86 to decode the index signal CDIX, and the index signal CDIX is supplied to a CRCC check circuit 87 to
The error check of the index signal CDIX is performed by the C code.

Then, the index signal CDIX from the check circuit 87
Is supplied to a register 88 to be converted from a serial signal to a parallel signal, and the parallelized index signal
CDIX is written to the RAM 71 through the switch circuit 72.
At this time, the address forming circuit 73 switches the switching circuit
The address signal is supplied to the RAM 71 through 74.

When the writing of the index signal CDIX is completed, the RAM 52 is sent from the controller 52 through the switch circuit 74.
And an index signal CDIX is read out, and the read out index signal CDIX is taken into the controller 52 through the switch circuit 72. Thereafter, processing corresponding to the index signal, for example, cueing is performed. .

〔The invention's effect〕

According to the present invention, a PLL follow-up is performed from within the postamble section preceding the index section of the magnetic track that is obliquely recorded / formed on the magnetic tape to the start end side of the recording area portion of the information signal of the magnetic track. The clock run signal and the index signal are recorded.

Therefore, according to the present invention, the section in which the clock run signal is recorded is greatly extended as compared with the related art, so that the PL is increased.
There is an effect that the ability to follow the reproduced data of the clock formed by L can be significantly improved.

As a result, the phase of the clock and the phase of the reproduced data can be accurately synchronized, and there is an effect that various data can be accurately read by preventing a data reading error.

Further, due to the above-mentioned effects, for example, P
Even when a part such as a CM audio data area or a postamble has been erased to some extent, there is an effect that data such as an index signal and a video signal can be accurately read.

[Brief description of the drawings]

FIG. 1 is an overall block diagram showing one embodiment of the present invention,
FIG. 2 is a timing chart of the circuit shown in FIG.
FIG. 4 is a block diagram of a partial circuit showing an example of the processing circuit shown in FIG. 1, FIG. 4 is a block diagram of a signal coupling circuit shown in FIG. 3, and FIG. 5 and FIG. FIG. 7 is a schematic diagram showing a conventional track format, FIG. 8 is a partially enlarged explanatory view of a recording format showing the configuration of a postamble section in FIG. 7, and FIG.
FIG. 7 is a schematic diagram showing a state in which a clock run signal and an index signal are recorded when data in a section such as PCM audio data and postamble in FIG. 7 is erased. Explanation of the main symbols in the drawings 1: magnetic tape, 2: magnetic track, 2S: audio track, 2V:
Video track, 28: Video signal, 241: Postamble, 24
2: Index section, S _CL: clock-run signal, CDIX: coding index signal, 243: section, S _AF: dubbing signal.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-150943 (JP, A) JP-A-62-172572 (JP, A) JP-A-62-78771 (JP, A) JP-A-62-78771 52764 (JP, A) JP-A-59-229709 (JP, A) JP-A-58-60418 (JP, A) JP-A-57-111808 (JP, A) JP-A-51-107119 (JP, A) Shokai Sho 61-40761 (JP, U)

Claims (1)

(57) [Claims] A magnetic tape which runs obliquely at a constant speed over a predetermined range with respect to a rotating peripheral surface of the rotary magnetic head, and an information signal is supplied to the rotary magnetic head for a predetermined period; In a helical scan type information signal recording apparatus in which an index section is provided at a position where the information signal is not recorded in the magnetic track, the index section of the magnetic track is sequentially recorded as an oblique magnetic track. An index signal forming means for forming an index signal to be recorded on the clock signal; and a clock run signal forming means for forming a clock run signal for following the PLL longer after recording the index signal than when recording an ordinary information signal. The clock run signal and the above-mentioned index signal are continuously combined to produce an after-recording signal. And a combining means for controlling the after-recording signal to be output from a postamble section preceding the index section during the post-recording to a start end side of a recording area portion of the information signal of the magnetic track. An information signal recording device, comprising: output control means.