JPH01307077A - Tape cassette - Google Patents

Abstract

PURPOSE:To surely attain the recording and reproducing at an optimum characteristic with a simple constitution by building in an IC memory to store respective types of the information of a tape in a cassette tape and controlling a magnetic recording reproducing device based on the information. CONSTITUTION:A magnetic tape 2, an IC 3 and a contact 4 are built in a cassette case 1. The IC 3 has a memory function and the control function of the memory. In the memory of the IC 3, the information to show the characteristic of the tape 2 is stored. When recording or reproducing is executed in the tape 2, a reading control signal is sent from a magnetic recording reproducing device to the IC 3, a desired signal in the IC 3 is read and the information is sent to the magnetic recording reproducing device. In the memory area of the IC 3, an area to write and store a present counted value is provided and each time a rotation detecting signal is sent, the contents are updated. Consequently, the recorded area can be identified by the stored counter number and the erroneous erasing, etc., can be prevented. At the time of reproduction, the program searching can be efficiently executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cassette tape recording and reproducing device, and in particular, tape characteristic VC such as tape characteristic identification, prevention of erroneous erasure, recording mode discrimination, cueing of recorded contents, etc. The present invention relates to a tape cassette suitable for detecting related information and various types of information.

[Conventional technology]

In conventional cassette tapes, a sensing hole is provided in the cassette body in order to identify tape characteristics and prevent erroneous erasure, which is described in Japanese Patent No. 48-5965. However, as the types of tapes and the number of detection items increase, sensing holes alone are no longer sufficient.

, [Problem to be solved by the invention] In cassette tapes for VTRs, the standard mode (S
There is a long-time reserve mode (P mode) and a long-time reserve mode (U mode).

During playback, it is necessary to distinguish between SP and LP recording time modes, but since there are cases where both modes are recorded in the same cassette, this cannot be done using the sensing hole. Regarding identification of recording time mode, see Japanese Patent Application Laid-Open No. 52-113705.
However, a dedicated circuit for mode identification is required.

In addition, regarding the cueing device for recorded contents,
Although this is described in Japanese Patent No. 14542, a dedicated circuit is also required. Furthermore, since it is unclear whether the content to be searched is before or after the current tape position, it is necessary to advance and rewind the tape 9 times. There were problems such as head deterioration due to having to rewind and the inability to increase speed.

The purpose of the present invention is to identify the characteristics of a-air tape so that it can be recorded and played back under optimal conditions at all times, and to
To provide a tape cassette which allows easy and reliable identification of LP recording time mode, recording signal mode, etc., and allows high-speed and highly accurate cueing.

[Means for Solving the Problems] In order to achieve the above object, the present invention incorporates an IC having a memory function and its control function in a cassette tape,
Various types of information about the tape are stored in the memory, and information is continuously outputted from the memory as needed, and the magnetic recording/reproducing device is controlled based on the information. Furthermore, information indicating the tape position, such as a counter number based on the tape end, is written into the memory at any time to constantly detect the position from the tape end. Writes the time mode identification signal, recording signal mode identification signal, etc. to the memory.

[Effect]

By reading these contents during reproduction, recording mode identification and recording signal mode identification are performed, and the cassette tape recording/reproducing apparatus is controlled. Furthermore, the specified value for cueing is compared with the counter number written in the memory to perform cueing control at high speed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure is a schematic diagram of a cassette tape with a built-in IC for a magnetic recording/reproducing device. In Figure 1, 1 is a cassette case, 2
3 is a magnetic tape, 3 is an IC, and 4 is a contact which is a connection means for transmitting and receiving control signals and information signals between a magnetic recording/reproducing device (not shown) and the IC 3, as well as supplying power to the IC 3. show.

Cassette case 1 has magnetic case 2. I(J, has a built-in contact 4. IC3&'!, has a memory function and a memory control function. The input/output terminals and power supply of IC3 are connected to the contact 4, respectively.

Information indicating the characteristics of the magnetic tape 2 is stored in the memory of the IC 5. The contents include things that require changes in recording and reproduction characteristics depending on the characteristics of the magnetic storage medium, such as recording current, recording and reproduction equalization characteristics, etc. When recording or reproducing data in the magnetic case 2, the magnetic recording/reproducing device sends a read control signal to the IC5 via the contact 4, and the memory control circuit in the jib and IC5 reads out the desired signal in the IC3, and the magnetic The information is sent to the recording/playback device. Based on this information, the magnetic recording/reproducing apparatus sets the characteristics of the recording or reproducing circuit to the optimum state.

FIG. 2 is a block diagram showing the circuit operation of the magnetic recording/reproducing device. In Figure 2, 4° is contact 4 in Figure 1.
Contacts on the magnetic recording/reproducing device side corresponding to 10, a system controller, 20 a recording signal processing circuit, 1.
31 is a switch, 40.41.42 is a recording equalization circuit, 5
0 is a recording amplifier, 60 is a magnetic head, 70 is a preamplifier, 80. 82 is a reproduction equalization circuit, and 90 is a reproduction signal processing circuit.

The recording signal processed by the recording signal processing circuit 20 is input to the recording equalization circuit 40.4% 42, and the output signals thereof are input to the switches 30, respectively. On the other hand, a read control signal is sent from the system controller 10 to the IC 3 via the contact 4' and the contact 4t in FIG. Identification signals for recording, reproduction equalization characteristics, and recording current characteristics are output from the IC3 in response to the readout control signal, and contacts 4,
41 to the system controller 10.

Based on the signal, the system controller 710 switches switches 30 and 51 and changes the recording current characteristics of the recording amplifier 50. The recording equalization characteristics are selected from the recording equalization circuits 40 to 42 depending on the characteristics of the magnetic tape 2 used.

The signal output from the switch 30 is recorded on the magnetic tape 2 via the recording amplifier 50 and the magnetic head.

As mentioned above, the recording amplifier 50 has system controls 0-
．． A control signal from the magnetic tape 210 is input, and the recording current is controlled so as to be optimal for the characteristics of the magnetic tape 2. Similarly, during reproduction, the signal is reproduced from the magnetic tape 2 by the magnetic head 60, and then sent to the reproduction equalization circuit 80.8 via the preamplifier 70t.
% 82, and their outputs are respectively input to switch S1. Switch 31 is also system control a-21
According to the signal from 0, the reproduction equalization circuit 8 (82) selects characteristics suitable for the characteristics of the magnetic tape 2. The output from the switch 31 is then input to the reproduced signal processing circuit 90.
The original recorded signal is restored.

My friend K. will explain the above using Figure 2.

The recording, reproduction equalization characteristics, and recording current characteristics of the magnetic recording/reproducing device can be automatically switched to characteristics suitable for the magnetic tape 2 according to the information read from the IC 5 without making any setting errors.

In the example of FIG. 2, an example of switching the recording, reproduction equalization characteristics, and recording current is shown at 9, but the same operation can be performed for other characteristics as necessary. For example, since signals are recorded with a bias on an audio cassette tape, the bias characteristics may be stored in the memory area of the IC 5 and the bias recording characteristics may be made variable.

If other recording information is written in the tape thickness t-IC3, optimal recording can be achieved by performing the following control. In other words, in order to optimize the tape head contact υ,
It is necessary to adjust the tape tension S/II depending on the tape thickness. When the cassette is loaded, the tape thickness is read from the ICs based on the read control signal from the system controller 10, and the tape thickness information is sent to the system controller 210 via the contact 4°4't. Based on this tape thickness information, the tape tension run is set. For this,
The contact characteristics of the tape head can be optimized and stable recording and reproduction can be performed. Due to the demand for longer recording times, there is a trend toward thinner tapes69, and the present invention is extremely effective as it is a necessary condition for a magnetic recording/reproducing device to be compatible with tapes of various tape thicknesses. .

Note that information may be read from the IC3 during recording, playback, or when loading the cassette 1. Also, if the memory of the IC5 used in this embodiment is read-only memory (ROM) t-. A suitable memory is one in which the contents of the memory are not erased even when the cassette is removed from the magnetic recording/reproducing device and the power supply is cut off.

Further, the IC 3 may be a one-chip IC having a memory function and its control function at the same time, or an IC consisting of a plurality of chips.

Another embodiment in which R and OM are used as the IC memory built into the cassette will be described. In the case of soft tape (recorded tape), there is no need to record the recording characteristics of the tape since no signals are recorded afterwards. Also,
RAM for retrieval of recorded contents for retrieval of software contents
By reading out the contents of υfl using a control signal from the magnetic recording/reproducing device, the contents recorded on the tape can be retrieved regardless of the tape position.

Another embodiment of the present invention will be explained with reference to FIG.

Parts of FIG. 3 are common to those of FIG. 1, and the common parts are designated by the same reference numerals and detailed explanation thereof will be omitted.

In FIG. 5, 110 is a reel, 111 is a thin metal, 1
12, 1ts, 114, 115 is a contact for transmitting and receiving control signals and alarm signals between the recording and reproducing device and the IC 115, and for supplying power to the IC 113 and the capacitive sensor 112. 115 is a contact for the IC 113. This is a backup battery.

The thin metal 111 is attached to the end face of the reel 110, and as the tape 2 runs, the reel 110 rotates, and the thin metal 111 also rotates at the same time. Capacitance sensor 112 is reel 1
10, detects the presence or absence of the thin metal 111, that is, detects 1100 rotations of the reel, and outputs a rotation detection signal 1Ic1.
Send to 13th. ICI 15 has seven functions and capacitive sensor 1
It has a function of counting rotation detection signals from 12, and a function of controlling memory writing and reading.

The memory area of the ICI 13 is provided with an area for writing and storing the current count value at any time. Each time a rotation detection signal is sent, its contents are updated, and a counter number indicating the current tape position with the tape end as a reference is stored. Note that the tape running direction can be detected, for example, by sending a control signal according to the tape running direction from the system controller 10. According to this control signal, the current counter number is incremented each time a rotation detection signal is sent in the forward direction, and is decremented in the reverse direction.

Furthermore, by resetting the counter number to a predetermined value each time the beginning or end of the tape is detected, the number of counter numbers can be increased.

The starting and ending ends of the tape may be detected by the conventional method of detecting the leader tape using light, capacitance, or the like. When the magnetic recording/reproducing device detects the end of the tape, it sends a reset signal to l0113 via contact 114 to reset the counter number.

Furthermore, in order to indicate the tape position with a counter number based on the tape end, the counter number of the current tape position must always be stored. Therefore, when the cassette tape is removed from the magnetic recording/reproducing device, a backup power source is required to retain the memory contents of I(j 13).

The battery 115 is a backup power source for this purpose.
□When recording, a signal indicating the recording mode is sent from the system controller 10 to the IC1 via the contact 114.
The data is sent to the control circuit No. 13 and written in the memory area of the counter number t-Ic 115 at the start and end of recording. Furthermore, when recording is performed, comments such as recorded contents are written in the memory area of the IC 11s as necessary. The counter numbers at the start and end of recording indicate that the corresponding tape area has already been recorded. During recording, the recorded area t can be identified by the stored counter number, and erroneous erasure and overwriting can be prevented.

In addition, since the counter number indicating the current tape position always changes, when searching for recorded contents, it is possible to cue efficiently by specifying all the counter numbers with the end of the tape as a reference. That is, if the counter number of the specified tape is larger than the counter number indicating the current tape position, it will fast forward, if it is smaller, it will rewind, and by stopping at the point where it matches the specified number, it will be possible to cue the beginning. .

Furthermore, since the recorded content is written as a comment in the memory area of the ICI 15, the recorded content and counter number can be confirmed by reading the memory area.

Furthermore, by referring to the counter number of the recorded portion, the counter number of the unrecorded portion of the remaining amount can be obtained.The system controller 10 calculates the recordable time from the counter number of the unrecorded portion. is also possible 1
1. It is also possible to know before recording whether it is sufficient for the recorded content.

Similarly, it is also possible to display the remaining amount of tape during recording.

Also, in devices with SP and LP modes, when recording
Write the SP and LP identification signals into the memory area of CI 13. At the time of reproduction, the identification signal can be read out and the mode can be automatically determined.

In addition, the recording signal is a standard television signal (NTSC).
, high-definition television signal (CHD), band-compressed high-definition television signal (MJSB), etc. Furthermore, a plurality of audio signals may be recorded in the video signal recording area. At the time of BD recording, these identification signals are stored in the memory area of let 15. The magnetic recording/reproducing device is provided with a processing circuit corresponding to each signal, and an identification signal f7c is provided during reproduction.
By reading the Ic113 and selecting the processing circuit according to the identification signal, various signals can be automatically reproduced.

In order to know the counter number based on the tape end of tape 2, in the example shown in FIG. A rotation detection signal detected on the side may be sent to the IC 113 via the contact 114.

Also, as information indicating the position of the tape 2, the reel 110
In addition to the zero rotation, a so-called control signal periodically recorded on the end of the tape 2 may be detected by a magnetic recording/reproducing device, and may be sent and written to the IC 113 via the contact 114. If the tape position is determined using a control signal, a left signal detection head (not shown) must be placed in contact with the tape 2 even during fast forwarding.

Furthermore, in the example shown in FIG. 3, the thin metal 111 is attached to the end of the reel 110, and the capacitive sensor 112't is placed on the opposite side thereof. Also good. Figure Wc4 is a schematic side view of the cassette tape. The component parts are the same as those in the schematic diagram shown in FIG.
The capacitance sensor 112 is embedded in the mold of the cassette 1. By attaching the thin metal 111 to the disk surface of the reel 110, the area in contact with the capacitance sensor 112 can be increased, and the amount of capacitance change can be increased, thereby improving the reliability of detection. In addition, the capacitance sensor 11
By inserting #l into the mold of cassette 1,
It is possible to improve reliability such as earthquake resistance, and to make it into a shed.

In addition, in the example shown in FIGS. 3 and 4, one thin metal 111
t-Although shown in the figure, by providing a plurality of them, the accuracy of detecting the position of the tape 2 can be improved.

Further, as a rotation detection method, a magnet and a magnetic sensor can be used instead of the thin metal 111 and the capacitive sensor 112. In this case, it is necessary to use a magnet whose magnetic force is sufficiently weak so that the influence of the magnet's appearance does not leave an adverse impression on the magnetic tape.

Further, another method of detecting the rotation of the reel is shown in FIG. A part of FIG. 5 is common to FIG. 4, and the common parts are given the same reference numerals. 120 is a light emitting element, 121 is a light receiving element, 122
is a light reflecting plate. The light emitting element 12G and the light receiving element 121 are embedded in the mold of the cassette 1 in parallel. A light reflecting plate 122 is attached to the surface of the reel 110.

The light emitted from the light emitting element 120 is emitted only when the light reflecting plate 122 is in front of the light emitting element 120 and the light receiving element 121.
The light is received by the light receiving element 121. Therefore, reel 1100
The light receiving element 121 can receive light corresponding to the rotation, and the rotation can be detected.

Note that the method for detecting the rotation of the reel 110 is not limited to the above method, and any method that can detect the rotation of the reel 110 may be used. More precisely, it is only necessary to specify the position of the tape 2.

Furthermore, the rotation detection means can be provided on either the supply reel or the take-up reel of the tape 2.

In addition, although FIGS. 1 and 6 to 5 show cases in which the tape 20 is wound on the reel 110, the tape winding means may be a hub as in the case of an audio cassette tape. [Can also be used. If a tape winding means is used, the metal thin 111
, the light reflecting plate 122 can be attached to the hub, and the rotation of the hub can be detected in the same way.

In addition, in the embodiments shown in FIGS. 1 and 3, IC5 or I
Although the connection means between the CI 15 and the magnetic recording/reproducing device is a contact, signals can also be sent and received using a light emitting element and a light receiving element. This case also falls within the gist of the present invention.

Although there is no particular designation regarding the mounting position of the IO3 or IC113, some examples are shown in FIG. (-3 is a schematic diagram when IC5 is attached to the outer surface of cassette case 1. Installation is easy. (b) is a schematic diagram when IC5'jk is attached to the inner surface of cassette case 1. It is relatively easy to install, and is protected against external pressure, increasing reliability. (C
) is a schematic diagram when I(Jt-) is embedded in the mold of the cassette case 1.

It is protected against external pressure, and is also protected against vibrations and shocks, making it even more reliable.

Further, in the above description, the tape end detection means is built into the magnetic recording/reproducing apparatus, but it can also be built into the cassette tape. In this case, a detection method similar to the conventional one may be used, but it is also possible to detect the tape end more simply. FIG. 7 shows a schematic diagram of the tape end detection device. 7th
In the figure, 200 and 201 are electrodes that also serve as guide bottles, and 202 is a power supply, indicating that the guide pin 201 is at the power supply potential. 203 is a conductive tape attached to the starting end leader tape portion of tape 2; 204 is a terminal;
The output of terminal 204 is connected to the reset terminal of the counter of ICI 15.

During the rewinding operation, the conductive tape 203 becomes the t-pole 20α20
1 at the same time, the output of the terminal 204 becomes the power supply potential. The counter of 9IC113 is reset by this output.

According to this, it is possible to easily improve the tape position accuracy without shifting the tape position reference.

Next, a high-speed, high-precision cueing method using the present invention will be explained. As explained in the embodiment shown in FIG.
By using the counter function built into the tape cassette, cueing can be performed with an accuracy that poses no problem in practical use. However, cueing cannot essentially be performed with an accuracy of less than one rotation of the reel. Furthermore, since the degree of tape winding is different between normal playback and fast forwarding or rewinding, the counter number may be slightly different. The present invention also solves this error.

For this purpose, an index signal for cueing is recorded on the tape. The index signal is, for example, a frame number recorded as a PCM signal, a time code, a program number, a specific pattern indicating the start of recording, etc. Alternatively, it is a specific signal recorded at the end of the tape indicating the start of recording, or a timed signal recorded deep in the width direction of the tape. In addition, any recorded signal may be used as long as it can be determined at the tape position. Note that the frame number, time code, and program number are written in xctts in association with counter numbers indicating the start and end of recording.

Next, this operation will be explained. As explained in the embodiment shown in FIG. 3, the recorded contents written in xctts are read out by the system processor 10 via the contact 114ft. Based on the read contents, the counter number or program number for which the cue is to be found is input into the system processor 10. If a number other than a counter number, such as a program number, is input, the system processor 10 determines the counter number for cueing based on the contents read from the ICI 13. A counter number indicating the current tape position is also transmitted from the engineering CI 15 to the system processor 10 via a contact 114. The cue counter number and the current counter number are compared, and if the current counter number is smaller, fast forwarding is performed, and if it is larger, rewinding is performed. At this time, fast forwarding and rewinding can be performed at high speed because there is no need to read out any content recorded on the tape. Then, the tape is played back when the tape runs up to a designated counter number (just before that number). Then, the frame number, time code, program number, etc. at that tape position are reproduced, compared with a predetermined value for cueing, and the tape is run in a search mode to a predetermined value.

If only a specific pattern is recorded, such as the recording start position, stop fast forwarding or rewinding at a clear position before and after the recording start position, enter search mode, and press K to ensure that the recording start position is detected. do.

As described above, according to the present invention, which uses the built-in counter function of the cassette to perform high-speed cueing and highly accurate cueing based on the signals recorded on the tape, it is possible to reliably and accurately locate the cue in a short time. It is possible to cue. - [Effects of the Invention] According to the present invention, it is possible to write and read information at the time of recording such as tape characteristics, counter number at the time of recording, and recorded contents in the IC built in the cassette tape.
Since the cassette tape device can be controlled based on the information read from the
Can be played. Furthermore, it can support multiple functions such as preventing accidental erasure and searching recorded contents. In addition, since the beginning of the tape can be found without reproducing the signal recorded on the tape, high-speed K
You can make 14 rolls. Furthermore, by using the index signal recorded on the tape for cueing, it is possible to cue with high precision.

[Brief Description of the Drawings] Fig. 1 is a schematic diagram of a cassette tape showing an embodiment of the present invention, and Fig. 2 is a schematic diagram of a cassette tape according to an embodiment of the present invention.
A block diagram of the TR, FIG. 3 is a schematic diagram of a cassette tape showing another embodiment of the present invention, FIGS. 4 and 5 are schematic diagrams showing a side view of the cassette tape of the present invention, and FIG. 6 is an IC diagram. FIG. 7 is a schematic diagram showing an example of a tape end detection means. 1...Cassette case, 2...Tape, 4...
...Contact, 50...Recording amplifier, 111...
metal thin, 112... violet sensor, 114...
··contact. Figure 3 Figure 4 Figure 5 Figure 6 (α) (C)

Claims (1)

[Claims] 1. A cassette type magnetic recording and reproducing device, which includes a magnetic tape, a means for winding the magnetic tape, a rotation detection means for the winding means, a means for counting the output of the rotation detection means, and at least a memory and a memory control circuit. IC including
and means for rewriting the count value in a predetermined area of the memory every time the count value of the counting means changes;
A connection means for connecting a signal between the IC and the magnetic recording/reproducing device is built into the cassette, and the IC
A tape cassette characterized in that a count value written in the tape cassette is read out and outputted from the connection means.