JPH07122033A - Cassette and electronic appliance - Google Patents

Abstract

PURPOSE:To prevent the missing of compatibility with the information being stored in a memory by changing only the information on a magnetic tape of the cassette provided with IC memory (MIC) by the video recording in the manner of using the MIC with built-in nonvolatile memory by a VTR which is not corresponded to the MIC. CONSTITUTION:When the MIC 1 is loaded to the VTR not corresponded to the MIC, the discrimination is made whether the tape is MIC or not, by a memory detecting hole 4 provided on the MIC 1 and a memory detecting switch 12 at the side of VTR, and when it is the MIC, the detection signal is sent to a control circuit 7. When the recording is intended to operate, the recording operation is prohibited by the control circuit 7 and also the warning is displayed on a display 8, and further the MIC is ejected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette and electronic equipment having two types of information recording media.

[0002]

2. Description of the Related Art In recent years, the spread of video and audio equipment has been remarkable, and the number of audio cassettes, video cassettes, and the like as recording media for each home has increased remarkably. In such a situation, a system capable of easily searching the recorded contents of those cassettes is required. For example, in a video cassette, an IC having a nonvolatile memory such as an EEPROM inside the cassette is required. A cassette with a memory (hereinafter referred to as MIC) has been proposed. The nonvolatile memory stores index information such as tape contents, title, date, time, message, recording method, timer reservation, etc. By reading the index information stored in the memory on the screen, You can check the contents without playing and you can easily search.

FIG. 4 shows an operation block diagram when recording on the MIC. The recording unit of the MIC surrounded by the broken line in FIG. 4 is composed of a non-volatile memory 44 and a magnetic tape 45, and the magnetic tape 45 records a track pattern divided into audio, video, and subcode areas. Key input section 40
Thus, the index information is supplied to the MPU 41 and stored in the non-volatile memory 44. Then, in order to match the information of the non-volatile memory 44 with the content of the magnetic tape 45, the MPU 41 controlling this system goes through the recording processing circuit 32 and the electromagnetic conversion circuit 43 to the subcode area on the magnetic tape 45. Similar index information is recorded. In this way, the MPU 41 adjusts the contents of the non-volatile memory and the magnetic tape 45 according to the key input unit 40.
Is controlled by.

FIG. 5 is a block diagram of a VTR compatible with MIC. The MIC1 has an erasure prevention detection switch 13
An erroneous erasure prevention detection hole 15 and a tape thickness detection hole 16 corresponding to the tape thickness detection switch 14 are provided. When these are engaged with each other, a contact member (not shown) contacts and becomes conductive. As a result, the detection signal is sent to the control circuit 7,
Instructions such as the operation of prohibiting recording on the tape and the type of tape are issued.

When the erroneous erasure prevention is not detected at the time of recording, the magnetic recording / reproducing circuit 10 records image information and audio information on the tape 2 by the rotary magnetic head 3 in a predetermined format. At the same time, index information relating to the recording time and the recorded contents of the magnetic tape 2 is written in the subcode of the tape 2 and stored in the non-volatile memory 6 via the memory interface (I / F) 5.

Next, at the time of reproduction, the index information stored in the non-volatile memory 6 is read out via the memory I / F 5 and displayed on the display 8 by the control circuit 7. By looking at this display, an instruction such as a search is keyed in, and the control circuit 7 controls the tape drive circuit 9 to control the tape 2
Perform cueing, etc.

[0007]

However, in the above-mentioned conventional example, there is no problem when the MIC is reproduced by the corresponding VTR, but in other cases, inconvenience may occur. FIG. 6 shows the relationship between the cassette and the VTR considered here. First, an arrow a represents a relationship in which the MIC 63 is reproduced by the MIC-compatible VTR 61, and an arrow b represents a relationship in which the MIC 63 is reproduced by the MIC-incompatible VTR 62. Next, the arrow c indicates that the normal cassette 64 is connected to the MIC compatible V
The arrow d indicates the normal cassette 6 because it is reproduced by TR61.
4 shows a relationship in which 4 is reproduced by the VTR 62 not compatible with MIC. The problem here is that the MIC 63 of arrow b
This is a case where the VTR 62 not compatible with IC is used for reproduction.

When the MIC is used in a non-compatible VTR system, if only the information on the magnetic tape of the MIC is changed by recording, the information stored in the memory of the MIC and the information recorded on the tape. The consistency with is disturbed. Therefore, an object of the present invention is to solve the above problems and provide a VTR system that is easy to use.

[0009]

The present invention has been made in order to solve the above-mentioned problems, and in a cassette having a first information recording medium and a second information recording medium, the second information is stored. It is characterized by having a detection unit for detecting the presence or absence of a recording medium. In addition, in an electronic device in which a cassette having a first information recording medium, a second information recording medium, and a detection unit for detecting the presence or absence of the second information recording medium is detachable, the information is detected by the detection unit. It is characterized by having a means for detecting the recording medium.

[0010]

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

<< Embodiment 1 >> FIG. 1 shows a schematic view of the configuration of the present embodiment. The same parts as those in FIG. 5 are designated by the same reference numerals and the description thereof will be omitted. When the MIC1 is loaded into the MIC-incompatible VTR, the cassette loading completion detection unit of the VTR detects the loading of the cassette. Then, the memory detection hole 11 provided in the MIC 1 and the memory detection switch 12 of the VTR are engaged with each other, and a MIC detection signal is generated. At this time, when a recording command is input by a key input unit (not shown), the control circuit 7 generates a recording prohibition signal of the magnetic tape 2 of MIC1 and displays a message "Recording cannot be performed because it is MIC" on the display 8. And warn the user. Then, the MIC is ejected by a known mechanism (not shown). Similarly, the MIC1
Is input, only the reproduction of the magnetic tape 2 is performed.

Next, FIG. 2 shows a detailed view of the memory detection switch 12. Memory detection pin 20 when MIC1 is loaded
Engages with the memory detection hole 11, the memory detection pin 20 is pushed downward, and the contact member 21 contacts and becomes conductive. As a result, the control circuit 7 generates the MIC detection signal,
When an attempt is made to record, a recording prohibition message is displayed on the display 8 of FIG. 1, and the MIC 1 is ejected by a known mechanism (not shown).

FIG. 3 shows M when the video cassette is loaded.
The operation of the IC-incompatible VTR is shown by a flowchart. When the cassette is loaded into the VTR, an operation command is keyed in at S1. In S2, it is determined whether it is a recording command. If it is a reproducing command, the process proceeds to S7 and reproduction is performed, and S8
It continues until the stop command is input at. Also,
If it is a recording command, the process proceeds to S3. Tape is MIC in S3
If it is not MIC, the process proceeds to S4. In S4, erroneous erasure prevention is detected, and if detected, a warning is displayed in S10 and the tape is ejected in S11. If not detected, the process proceeds to S5 to start recording, and is continued until a stop command is input in S6. If the tape is MIC in S3, S12
After the warning display is displayed, the tape is ejected in S11.

As described above, the MIC does not correspond to the MIC compatible VTR.
Is loaded, it is judged whether it is MIC, and M
By prohibiting the recording operation when it is an IC, it is possible to prevent the matching between the information in the memory of the MIC and the information recorded on the magnetic tape from being lost. Although the video tape has been described in this embodiment, it is needless to say that it can be applied to various tapes such as audio. Also,
Although the detection hole is used for detecting the memory in the embodiment, it is needless to say that the information recording medium may be other than the memory as other shapes are possible.

[0015]

As described above, in a cassette having two types of information recording media, an electronic device in which the detection unit for detecting the presence / absence of one of the information recording media is provided and the cassette can be attached and detached In the electronic device that does not support a cassette having two types of information recording media, the new information is erroneously added to only one information recording medium in the electronic device that has a means for detecting the information recording medium by the detection unit. Can be recorded, and the consistency of the recorded contents of the two types of information recording media can be prevented from being destroyed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a detailed view of the memory detection switch according to the embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 4 is an operation block diagram for writing information to the MIC.

FIG. 5 is a configuration diagram of a conventional example.

FIG. 6 is a relationship diagram between a cassette and a VTR.

[Explanation of symbols]

 1 MIC 6 nonvolatile memory 7 control circuit 11 memory detection hole 12 memory detection switch 20 memory detection pin 21 contact member

Claims (2)

[Claims] 1. A cassette having a first information recording medium and a second information recording medium, the cassette having a detection unit for detecting the presence or absence of the second information recording medium. 2. An electronic device in which a cassette having a first information recording medium, a second information recording medium, and a detection unit for detecting the presence / absence of the second information recording medium is attachable / detachable. An electronic device comprising means for detecting the information recording medium according to the above.