JPS62229592A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate the edition of a tape by providing a 1st and 2nd tracks for exclusive use and reading the same address data regardless of the forward/ reverse running direction of the tape. CONSTITUTION:The content of a cassette tape after recording is read by reproducing heads 9, 10 and recorded by recording heads 1, 2. In applying edition, the address data are stored manually by a recording/reproduction control circuit 11, an address is designated by apply dubbing the content of the buffer tape on other cassette tape. In this case, the reproducing heads 3, 4 read the content of the 1st and 2nd tracks, an address data processing circuit 12 decides the content to discriminate a header. Thus, the address data are read from the 1st and 2nd tracks of the buffer tape and compared with the designated address recorded in the circuit 11 to access the content of tape at random. Thus, the edition of tape is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing device that facilitates recording and editing of recorded contents on a magnetic tape using a magnetic recorder and a magnetic recording and reproducing device.

BACKGROUND ART Conventionally, when editing the contents of a magnetic tape recording, there was no information indicating the beginning and end of several types of information recorded on the tape to be edited, so it was necessary to find a silent period and edit it. There is.

Problems to be Solved by the Invention However, this conventional means has the disadvantage that it malfunctions when the silent period is short, and also has the problem that editing cannot be performed at all when there is no silent period.

The present invention is intended to solve the above-mentioned conventional problems and to provide a magnetic recording/reproducing device that can easily perform editing regardless of the presence or absence of a silent period.

Means for Solving the Problems The present invention provides a magnetic tape with a first address dedicated address. A second track is provided so that address data is recorded on the first track and the same address data as the address data recorded on the first track can be read when the running direction of the magnetic tape is reversed. It is characterized in that address data is recorded on the second track.

According to the present invention, in addition to two-channel tracks on which various types of information such as music are recorded, an address-only track on which addresses are recorded is provided, so that the information data on the tape can be edited using these addresses. can be done.

Example FIG. 1 shows a block diagram of an embodiment of the present invention.

In the figure, 1 and 2 are magnetic recording heads, 3, 4, 6, 6° 9 and 1
0 are all playback heads, A and 8 are magnetic recording heads, 2
1.22, 27.28 are magnetic recording heads' + 217
an amplifier that amplifies the signal supplied to 18 to an appropriate level and matches the impedance; 23, 2;
4, 25, 26, and 29.30 are amplifiers that amplify the reproduced signals; 11 is a control circuit that controls magnetic recording and reproduction; 12 is a processing circuit that reads address data recorded on the magnetic tape; 13 is an address 14 is a cassette tape that can be attached to and detached from the main body of the recording device (see Fig. 3, 17).
16 is a motor that rotationally drives a non-removable cassette tape (hereinafter referred to as buff 7 tape).

Consider the cassette tape recorder 20 (the same applies to a cassette deck) shown in FIG. 3 as an example of a device in which these are implemented.

In FIG. 3, 13L is a 6-digit counter (address display), 16 is a buffer tape drive section consisting of a buffer tape 16T and a drive mechanism 16M, and 17 is a cassette tape drive circuit 17M and a cassette tape storage section. 17B is a cassette tape drive unit, 18 is a group of front operation keys, 19L is a left speaker, and 19R is a right speaker.The buff 7 tape drive unit 16 is arranged with the cassette tape drive unit 17, and the buff 7 tape is connected to the cassette. If the same cassette tape configuration as that inserted into the tape drive section 17 is used, the configuration will be the same as that of a double cassette tape recorder.

Here, as an overview of the operation of this configuration, for example, 10 songs from an FM broadcast are recorded on a cassette tape (hereinafter referred to as a music cassette tape) inserted into the cassette tape drive unit 17, and the necessary 6 songs are transferred to another cassette. Consider the case of dubbing onto a tape (hereinafter referred to as tape X). First, a music cassette tape is inserted into the storage section 17B, and key A in the front operation key group 18 is pressed to dub the entire contents of the music cassette tape to the buffer tape at, for example, 4x speed. At this time, if you monitor the playback output of the music cassette tape, you can see the beginning and end of the song.
Stop the running of the music cassette tape and press the reverse running button B
Press to run the music cassette tape in reverse, and at the same time, the buffer tape in the buffer tape drive section 16 is also run in reverse in synchronization to start the song.

Accurately judge the end and then press key C to record/playback control circuit 1 to record data (start address) indicating the beginning of the song.
1 and press key D to display the data indicating the end of the song (
address) is stored in the recording/playback control circuit 11. If you repeat this for 10 songs, all the contents of the music cassette tape will be dubbed onto the buffer tape, and each address will also be registered in the recording/playback control circuit 11, so press the edit key F to lock it (keys C and D). Press to set the beginning and end of the song, and press each time you set the song.

Press key G to record/playback control circuit 1 to edit the address.
1, press the dubbing key H, and dub five songs from the buffer 7 tape in the buffer 7 tape drive section 16 to the tape X newly inserted into the cassette tape drive section 17 in the editing order.

In the above explanation, we have described a method for registering addresses while playing a music cassette tape, but it is also possible to play back the contents of the buffer tape at 4x speed and edit only the necessary parts by writing the addresses to the recording/playback control circuit 11. It's okay.

The operation will be described in more detail below with reference to FIGS. 1 and 2. Consider the configuration shown in FIG. 2 as a buffer tape. That is, a header H and address data consisting of data a0 to a4 are recorded in advance in the first track T1 in the tape running direction A, and a track is recorded in the second track T2 in the reverse tape running direction as shown in FIG. The same address data as the data of T1 is arranged and recorded in the opposite direction so that the address data is the same at the position n in FIG. 2 no matter which direction the tape runs.

If the tape address is 5 digits, and the tape running speed is approximately 2.5c11/sec, the length of a 30 minute cassette tape will be 2.5 x 30 x 80 = 4600 m = 45 m, and if it is 6 digits, it will be 0.46 (to). An address can be added for each. If you use Buff 7 tape and run on one side for 2 hours (V
(You can think of it as a TR tape), then an address can be added every 1.8 bits. That is, 5 digits is sufficient. In reality, the running speed of a music cassette tape is 2.5-/f)
Therefore, the running speed of the buffer tape is 2.5 t
v/sec, there is no problem even if one address is allocated every second.

In FIG. 2, the portions indicated by R are the audio signal recording portions of the L channel and R channel, respectively.

Here, in any case, we assume that the buffer 7 tape is a tape used in high-speed cassette decks or VTRs, has good high frequency characteristics, can be used for long recording times, and has 4 tracks.

Now, insert the recorded music cassette tape into the storage section 17B, drive it with the motor 14, and press key A.
The contents of the music cassette tape are read out by playback heads 9 and 10 and amplified by amplifiers 29 and 30. playback head 9
, 1o, the amplifiers 29 and 30 are assumed to have a maximum frequency characteristic of s o KHz s when the content of the music cassette tape has a frequency characteristic of 20 Hz to 20 KHz.

If the outputs of the amplifiers 29, 29, 30 are to be recorded as they are on the buffer tape, the amplifiers 21, 29, 29, 29, 29, 29, 29, 29, 29, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30 . It is sufficient to connect the amplifiers 22 and 30, but when performing digital processing, insert digital encoders 31 and 32 between the amplifiers 21 and 29 degrees and between the amplifiers 22 and 30, respectively, as shown in Fig. 4 to convert the analog signal. It is sufficient to convert it into a digital signal and transmit it to the amplifiers 21 and 22.Digital control circuit E3
In step 5, the speed of A-D conversion is switched based on the tape speed information from the recording/playback control circuit 11.

Therefore, if a music cassette tape is played back at 4x speed, digital audio signals are written to the buffer 7 tape at 4x speed. The buffer tape is also running at 4x speed, but whether it is played back at 4x speed or at normal speed, the quality of the reproduced signal is the same as the original signal because it is digitally processed.

Next, think about editing. Here, it is assumed that the music cassette tape has long and short silent sections at random and cannot be used as a guide for editing, and address data is manually stored in the recording/playback control circuit 11 as described above.

Insert the tape X into the storage section 17B, specify the address using the key, and dub the contents of the buffer tape to the selected tape X. In this case, playback head 3. From the playback head 4, the contents of the first track T1 in FIG.
The contents of the track T2 are read out, and when the buffer tape is running in the forward direction, the contents of the first track T1 read out by the playback head 3 are amplified by the amplifier 23, and determined by the address data processing circuit 12, as shown in FIG. Decipher the data of part n of . The data includes header H, LSB ao to MSB a4, according to the tape running direction.
6-digit BCD data is recorded. a0~a4
If it is a BCD code as shown above, there will not be four consecutive "1"s, so the header Hn should be changed to one with four "1"s between "o" and rOJ as shown in Figure 2. , the header can be easily identified. The data may be encoded in advance. Therefore, when the address is reversed and a large number becomes a small number, the buffer tape is run in the opposite direction of arrow A in FIG. The data is amplified and determined by the address data processing circuit 12. In the address data processing circuit 12, the output of the amplifier 23 is also transmitted to the amplifier 24.
The output of can also be treated in the same way. This is because the address data were recorded on the tape in opposite directions as shown in FIG.

As described above, by reading the address data from the first track or the second track of the buffer tape and comparing it with the specified address recorded in the recording/playback control circuit 11, the content of the buffer tape is randomly accessed and You can dub to the 3rd page of the 0 buffer tape. L recorded on the fourth track
Channel and R channel signals are read out by read heads 5 and 6 and amplified by amplifiers 24 and 26. When a digitally converted signal is recorded on the buffer tape, the output of the amplifier 25 is processed by the digital decoder 33 and supplied to the amplifier 27, as shown in FIG. 4, and the output of the amplifier 26 is processed by the digital decoder 34. and supplies it to 28.

When the signal recorded on the buffer 7 tape is a normal audio signal, the output of the amplifier 26 is directly supplied to the amplifier 27, and the output of the amplifier 26 is supplied to the amplifier 28, respectively.

Recording heads 7 and 8 record the contents of the buffer 7 tape onto tape X. Note that when the buffer tape 7 and tape X are running at 4x speed, the digital control circuit D36 quadruples the digital processing speed and
When the Buffer 7 is running at normal speed, it is a circuit that controls digital processing such as performing normal digital processing.0 With the above configuration, the information recorded on the Buff 7 tape can be randomly accessed. It is possible to dub to tape X. Note that the music tape may be used instead of tape X, and edited information may be recorded on part or all of it. It goes without saying that it is also possible to record PCM using a VTR tape as a buffer tape. Needless to say, this configuration can be applied not only to cassette tapes but also to open-reel tapes. Also, a counter with four digits is sufficient for practical use. It is also clear that if each digital logic process is performed by a microcomputer, it can be realized with a relatively simple configuration.

Effects of the Invention As is clear from the embodiments, according to the present invention, the following effects can be obtained.

(1) The length of the buff 7 tape is not limited by the length of a normal cassette tape (m81, 60 minutes per side), and is not limited to the length of a VTR (y6
If you make it the same shape as the inch), you can record up to 8 hours.

(2) If digital processing is performed, one buffer tape can be used many times. It is also less affected by deterioration.

Further, the material of the tape and the recording method can be changed from those of a normal normal cassette, and it has the advantage that there are no restrictions in terms of durability and frequency characteristics.

(3) Even if the running direction of the tape is reversed, the same address can be obtained at the same location, and the reproduction address signal can be processed independently of the running direction of the tape. Therefore, the processing circuit can be easily constructed.

(4) Since addresses are added consecutively, random access is possible, and tapes without silent parts can also be used.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 2 is a front view showing an example of recording on a buffer tape in the device, and FIG. 3 is a perspective view showing an example of implementation of the device. FIG. 4 is a block diagram showing an example of digital signal processing in the same device. 1.2,7.8... Recording head, 3,4,5°6.9.10... Playback head, 21.22,2
7゜28...Amplifier for recording head, 23,2
4,25゜26.29.30... Playback signal amplifier, 11... Recording/playback control circuit, 12...
... Address data processing circuit, 13 ... Address display, 15 ... Motor 0

Claims (2)

[Claims] (1) Address data proportional to the running length of the magnetic tape is recorded on the first track in the running direction I, and when the running direction becomes opposite to the running direction I, the address data is recorded on the first track. The housing has a tape on which address data is recorded on a second track so that the same address data as the one read out can be read out. A magnetic recording and reproducing device equipped with a head that records and reproduces information only when (2) The magnetic recording/reproducing apparatus according to claim 1, wherein the reference clock of the circuit for reading the data of the first and second tracks is switched in accordance with the running speed of the tape.