JPS61153880A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To perform recording and reproduction fast at a desired position on a recording medium with simple constitution by recording directory information behind main recording data, recording its address data on another recording medium, and reproducing directory information corresponding to the reproduced address data out of the recording medium. CONSTITUTION:A sound recording signal inputted to an input terminal IN is passed through a DA converting circuit 10, error correction code adding circuit 9, modulating circuit 8, sound recording amplifier 7, and sound recording head 2 and recorded on a magnetic tape, and directory information on the sound recording contents is recorded behind the sound recording part. When the cassette CC of the magnetic tape 11 is loaded newly, the directory information is read out and written on a memory 17. When the CC is unloaded, the address data read out of the memory 17 is recorded on the magnetic tape 12. When a desired playback music number is inputted during reproduction, its address data is received by a control circuit 16 through the memory 17 and the tape 11 is run to a position corresponding to the data to place the tape in a playback state.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to, for example, a digital audio tag;
The present invention relates to a recording and reproducing device suitable as a DAT), and particularly to one that is capable of speeding up recording and reproducing.

[Technical background and problems of the invention]

In general, cheap playback devices that use magnetic tape or optical tape as a recording medium are different from recording and playback devices that use disks as a recording medium because of their nature. The problem is that it cannot be done.

This is true even when directory information is embedded at the beginning of the tape, such as magnetic tapes used in information processing equipment such as combinations.

The situation is the same since the tape is always played back from the beginning (the tape is always played back from the beginning), but each time the main recording data is recorded, it is necessary to return to the beginning and record the directory information.

[Purpose of the invention]

Therefore, this invention was made in view of the above points, and is an extremely improved system that has a simple structure and is capable of recording and reproducing at a desired tape-shaped recording medium position at the highest possible speed during operation. The purpose is to provide a good recording and reproducing device.

[Summary of the invention]

That is, in order to achieve the above object, the recording and reproducing apparatus according to the present invention records main recording data together with address data on a tape-shaped first recording medium wound around a cassette case, and records the main recording data together with address data. A recording and reproducing apparatus that records directory information includes a directory information recording means for recording the IJ information after the end portion of each main recording data in the first recording medium, and a address data recording means for recording address data of the directory information on a second recording medium provided; and address data reproducing means for reproducing the address data recorded on the second recording medium by the address data recording means. and directory information reproducing means for reproducing directory information corresponding to the address data reproduced by the address data reproducing means from the first recording medium.

[Embodiments of the invention]

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

FIG. 1 shows a case in which the present invention is applied to, for example, a rotating head type (fixed head type is also possible) DAT. That is, a reproduction signal obtained by reproducing by the reproduction head 1 a magnetic chip 7a11 wound around a cassette case (CC) so as to be freely movable.

Output terminal (OUT) via a reproduction system consisting of an equalizer/reproduction amplifier 4, an error correction circuit 5, a conversion circuit 6, etc.
(It is done as derived.

Also, if the recording signal supplied to the input terminal (IN) is %D/A
Conversion circuit 10, error correction code addition circuit 9, modulation circuit 8
, a recording amplifier 1, a recording head 2, etc. are recorded on the magnetic head fxx via a recording system.

A magnetic tape 12 is provided on the outer side of the cassette case (CC) and serves as an address data recording/reproducing section for directory information, which will be described later. A fixed rad 13 is provided. This fixed head 1311C is connected to, for example, a microphone e via the recording/reproducing circuit 14.
! A control circuit 16 consisting of a processor (CPU) or the like is coupled thereto.

The control circuit 16 is connected to the input side of the conversion circuit 6 and the output side of the conversion circuit 10, and also has first and second internal memories with non-volatility, which will be described later.
(2) A motor system 18 for running the magnetic tape 11 is connected to the magnetic tape 11 and 19.

FIG. 2 shows a specific example of the directory information'address data recording/reproducing section, in which the recording/reproducing circuit 14 is connected to the recording amplifier 141. Modulation circuit 142, regenerative amplifier 143,
Demodulation circuit 144,! It is composed of a microswitch 145 and a delay circuit 146.

With the above-described configuration, first, the overall operation path will be explained. Each time the recording signal supplied to the input terminal (IN) C to the magnetic tape 11 is recorded as described above, , the directory information of the recording contents is recorded at the end of the recording section of the magnetic tape 11. Then, when a new cassette case (CC) with the magnetic gator 11 wound therein is inserted, the directory information is immediately read out and written to the first internal menu 11.

Also, when the cassette case (CC) is taken out, the address data with the directory information is read out from the first internal memory 1r and the cassette case (CC) is taken out.
) Magnetic gator 12) provided on the outside of the retardation information address gator recording and reproducing section. The directory information and the address data are non-volatile and
Since the data is always stored in the second internal memory (1), (17.19), when the power is turned on again, it will be read from the corresponding tape position.

Next, each operating state will be explained in sequence.

[When loading]

When loading, first the cassette case (CC)
) is read out from the address data of the directory information recorded in advance on the magnetic tape 12 provided on the outer side of the second
The magnetic tape 11 is then run to the position corresponding to the address data (1). The f4 directory information stored therein in advance is read out and written into the first internal memory 11. At this time, if the directory information written in the first internal memory ■17VC is read out and displayed, for example, on a display (not shown) as directory information such as the total recording time and the total number of recorded songs, it will be possible to select songs etc. It's convenient.

Note that if nothing is recorded in the magnetic case 11 (for example, a new Qi f), the cassette case (CC
) Since nothing is recorded on the magnetic tape F12 provided on the outside of the tape, when loading it, the tape should be stopped at the beginning. At this time, it is assumed that an initial value is written into the first internal memory 17.

[When playing]

During playback, when a desired playback song number is input through an operation unit (not shown), the control circuit 16 receives the address data via the internal memory 17t of @1, and the magnetic After the tape 11 is run to a position corresponding to the address data, it is brought into a playback state. At this time, the playback song number and elapsed or remaining time information are displayed. In addition.

It is assumed that the portion of the magnetic tape 11 where directory information is recorded is not reproduced. At the end of reproduction, the address data is read from the magnetic chip 7#r1 and written into the first internal memory 17.

[When fast forwarding or rewinding]

At the end of fast forwarding or rewinding, the address data t- is read from the magnetic tape 11 and stored in the first internal memory 1
2 shall be set to 0. At this time, 1 song number will be displayed.

[When recording]

During recording, the address data at the current white point is read from the first internal memory ■12, and based on this address data is recorded while recording, and when the recording is finished, the address data is read from the first internal memory ■12. New data is added to the data of 17 to generate new directory information, which is recorded at the end of the recording section of the magnetic tape 11.

Also, the address data at this time is stored in the second internal memory.
19, and further write the address data of the position on the magnetic tape 11 at the end of recording into the first internal memory 17.

[When recording and reproducing directory information]

rIA that records directory information magnetically
After generating the directory information as described above,
The directory information signal is inputted into an error correction code addition circuit 9 to add an error correction code, and further inputted into a modulation circuit 8 and subjected to a predetermined change tA. The magnetic tape 111fC shown in FIG. 3 is divided into three tracks 33 and the same content is recorded on each track. In addition, in order to distinguish the directory information recorded in the three tracks 33 from normal recording (music) signals and to prohibit its reproduction, a reproduction prohibition code is added to the subcode 34 in FIG. Make it possible to mute directory information.

In addition, when reproducing the directory information recorded on the magnetic tape 11 IC as described above, the VC reads out the address data of the directory information written in advance in the second memory 19, and converts the magnetic chip f11 into the address data. After performing a search such as driving to the corresponding position.

At that position, the directory information recorded in three tracks 33 is reproduced by the reproduction head 1. and,
After the reproduced signal is input to a demodulation circuit 41C via an equalizer/regeneration amplifier 3 and demodulated, the reproduced signal is input to an error correction circuit 5, where all error correction processing is performed, and then guided to a control circuit 16, where it is input by three directory information signals. After determining the correct bit by assembling a predetermined logic, the I internal memory ■
17.

[When unloading]

During unloading, the address data of the directory information written in advance in the second internal memory 19 is read out, and the address data is set on the outside of the cassette case (CC) by the fixed head 13 via the recording/reproducing circuit 14. The information is recorded on a magnetic tape 12 which is .

[When generating directory information]

The contents of the directory IJ information generated here are, for example, the start and end addresses of one song recorded on the magnetic tape IC, the recording time of one song, and the total recording time.

Among these contents, the information given from the outside during recording is only one white address (1), and the other information is given to the control circuit 16 from the time of recording start to the time of stop (Fig. 4). It shall be calculated using the formulas shown in ■~■.

That is, in each of FIGS. 4-4, the upper part shows the previous recording state, and the lower part shows the new recording state.

First, in the case of ■ (the address at the end of the previous song is the address at the beginning of the newly recorded song (the shaded area, the same applies hereafter))C
Unfortunately, there is no song after the newly recorded song! ! To do so,
The time up to the previous song plus the time of the newly recorded song is t - the new total recording time. This is a case where the total time is calculated from the last address of the new Lh song.

In the case of ■ (when the last address of the previous song is the same as the address of the beginning of the recorded song, and there is a song with no beginning after the newly recorded song), Fi.

Calculate the total recording time in the same way as in case ■.

In the case of ■ (if there is an address at the beginning of the newly recorded song before the ending address of the previous song, and there is nothing at the end of the ending address of the newly recorded song), The total recording time is calculated by replacing the end address of the song with the beginning address of the newly recorded song, and calculating the recording time of the previous song and the recording time of the newly recorded song.

In the case of ■ (when there is an address at the end of the previous song, the address at the beginning of the newly recorded song is blank, or there is a song with no beginning after the address at the end of the newly recorded song) for,
The total recording time is calculated by performing the same process as in case (2).

In the case of ■ (il?L<when there is a rib with no head after the recorded song, and then there is white with the beginning of the song), the total recording time does not change.

The case of ■ is also the same as the case of ■.

In the above description, the number of songs is calculated by counting the songs whose first address is written, and the song numbers are assigned in the order of the WR addresses.

[When recording and playing address data to the cassette case]

Address data of the directory information for this cassette case CCC>Ic is recorded and reproduced on the magnetic tape I2 provided on the outside of the cassette case (CC) using the fixed spatula shown in Figures 1 and 2. shall be.

What is the recording format for this magnetic tape 12?

As shown in Fig. 5, an IC2) rack (Sl, S2) is used, and an address signal called NRZI with a /f property code is recorded in the track (Sl) part, and an address signal called NRZI is recorded on the track (◆2). It is assumed that a read clock is recorded in the part.

By the way, if the recording time of one magnetic tape for recording music signals is 2 hours, this corresponds to 480,000 scans performed by each rotating head 92 or 1, and this is expressed as a pit. It can be expressed in 19 bits. Therefore, for the address data of the directory information, one block is made up of a total of 21 pits, including the 19 bits mentioned above with a margin of 1 pit, and the lk' cut and measurement T code. In order to prevent errors, a total of 3 blocks and 63 bits are recorded as address data. Note that the tape length that can record this amount of data is usually 2 cm and 100 ~
Since 200-bit recording is possible, space loss must be considered.
Even if it were, 23 would be enough, so the cassette tape 12 provided on the outside of the cassette case (CC) would be sufficient.

FIG. 6 shows a specific example of the recording and reproducing mechanism section for such directory address data, and the recording is performed from (e) to (b) in the same figure.
) → (a) during unloading, and regeneration is performed when loading (&) → (b) → (e) in the figure.

First, during unloading, the same figure (e) → (b)
When the microswitch 145 is turned on while moving up to
When the control circuit 16 becomes operational via the delay circuit 146 shown in FIG. 2, the modulation circuit 142. The magnetic tape 12 is transferred to the fixed head 13 via the recording amplifier 141.
Start recording the directory address r--t. This address data is the serial data read out from the first internal memory 12 via the control circuit 16 and subjected to NRZI encoding by adding a /metering code.

Then, when moving from (b) to (a), the microswitch 145 is turned off, thereby stopping the control circuit 16 and stopping recording.

Also, during loading, address data is reproduced from the magnetic tape 12 in a relationship substantially opposite to that described above.
However, at this time, if each bit is read out at the timing of the clock of the track (S2) in the address data recording format shown in FIG.

In addition, recording of address data as described above.

During playback, the MSB and LSB have an inverse relationship to each other, but...! Since one security code is attached to each block, during playback, the readiness is checked every 1f locks, and if correct data bits are obtained, serial data is sent to the control circuit 16 in the playback layer. All you have to do is rearrange it here and write to internal memory 1 171C.

FIG. 7 shows the stretched state of the magnetic tape 11 during loading Fi.

Figure 6 (1) l (b), (@) and Figure 7 above
In the figure, 100 is a rotary cylinder, 101 is a control head, 102 is a first guide, 103 is a capstan, 104 to 1 o yFi movable loading tape guide, and IO2 is a movable capstan. Further, 131 is a rotary roller, 132 is a head pedestal, 133
134 is a spring guide shaft, 135Fi fixing metal fittings, and z31 are springs.

FIG. 8 shows a flowchart summarizing the operations of the above-mentioned parts, and the functions of the above-mentioned parts are performed at each step.

According to the above-described magnetic recording/reproducing device, since directory information is recorded immediately after each recording section,
It is possible to shorten the time by not having to go back to the beginning of the tape as in the past, and the address data of the directory information can be read immediately when t-coding, so the state of the tape (position) can be checked. Directory information can be searched at high speed regardless of the situation.

In this case, if the directory information is converted into so-called TOC (table-op-content), it is possible to perform high-speed searches, cueing, etc. by referring to it.

It goes without saying that this invention can be applied to fixed head DATs in the same way as described above, and that various modifications and applications can be made without departing from the gist of the invention. The present invention is applicable not only to tapes but also to recording and reproducing devices that use optical tapes as recording media.

〔Effect of the invention〕

Therefore, as described in detail above, according to the present invention, an extremely good recording and reproducing system which is improved so that recording and reproducing can always be performed at a desired tape-shaped recording medium position at the highest possible speed with a simple configuration is achieved. It becomes possible to provide the device.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the main part of an embodiment of the recording and reproducing apparatus according to the present invention, FIG. 2 is an explanatory diagram of the configuration of a specific example of the address data recording and reproducing section of FIG. 1, and FIG. Figure 4 shows the recording format of directory information, Figure 4 shows each recording format for calculating recording time, Figure 5 shows the address data recording frame, Figure 6 shows the address data recording and reproducing mechanism. Operation route diagram showing a specific example of the part, seventh
The figure shows the loading state, and FIG. 8 is a flowchart summarizing the operations of each part. (CC)...Cassette case, 11...Magnetic tape, 1...Playback head, 4...Equalizer/playback amplifier, 5...Error correction circuit, 6...-A/1) conversion circuit, 10.-D/A conversion circuit, 9.. error correction code addition circuit, 8.. modulation circuit, 9.. recording amplifier, 2.
...Recording head, 12...Magnetic tape, 13...Fixed head, 14-...Recording and reproducing circuit, 16-...Control circuit, 11.19-...Internal memory, 18...Tanabata System, 141... Recording amplifier, 142... Modulation circuit, 1
43... Regenerative amplifier, 144... Demodulation circuit, 145
...Micro switch, 146...Delay circuit. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] In a recording and reproducing apparatus that records main recording data together with address data on a tape-shaped first recording medium wound around a cassette case, and also records directory information of the main recording data, directory information recording means for recording after the end portion of each main recording data on one recording medium; and address data recording means for recording address data of the directory information on a second recording medium provided outside the cassette case. and address data reproducing means for reproducing the address data recorded on the second recording medium by the address data recording means, and directory information corresponding to the address data reproduced by the address data reproducing means on the first recording medium. 1. A recording and reproducing apparatus comprising: directory information reproducing means for reproducing from a recording medium.