JP2898833B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus, and more particularly, to a magnetic recording and reproducing apparatus such as a home video tape recorder.

[0002]

2. Description of the Related Art In a CTL (control signal) coding system of a VHS (Video Home System) format, there is a method of recording information on a control track by changing a duty ratio of a control signal. A cue code that writes “0” at both ends, writes “1” at 61 ± 3 bits, a total of 63 ± 3 bits, and “0” at both ends,
There was a 4-bit BCD 4-digit user data, a BCD 6-digit time code data, and a time code composed of a 4-bit checksum for a total of 50 bits with "1" being 9 bits and a header having a total of 11 bits at both ends. .

[0003]

As described above, in the conventional VHS format CTL coding method, the start code is used for almost all models, but the address code and the time code are not used.
The purpose of use is not used much for the editing function. Also, for users who have a lot of videotapes or who record many programs on one tape,
The organization of the recorded tape was a problem. For example, to record a drama or movie and identify a program that had accumulated without watching, some programs had to be watched. The broadcaster didn't know what time it was recorded.

The present invention has been made in view of such circumstances, and provides a magnetic recording / reproducing apparatus capable of recording a drama or movie and specifying a program that has been accumulated without watching. It is intended to be.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a calendar function, a clock means for outputting date and time information during recording, and a tuner for outputting channel information during recording. Counting means for counting up each time a picture is recorded; recording means for recording information by the clock means; recording of information by the tuner; and recording of a count value by the counting means as an address value; and the counting means. And a control head for writing the count value on the control track of the magnetic tape, reading the count value written on the control track of the magnetic tape during reproduction, specifying the storage means with an address value, and recording. It is characterized in that time information is called and displayed.

[0006]

When the recording switch is pressed and a signal indicating the recording mode is sent to the counter, the counter counts up by one. The counter is protected by a power source such as a lithium battery and holds the previous value unless reset. Each time the recording switch is pressed, the counter value increases. The counter value of the counter is VASS (Video Address Search).
4 bits B after the head of the address code of the system
Write to 4 digits of CD. Alternatively, the time code of the VASS signal is written to 4-bit BCD 4-digit user data. At the same time, the counter value is used as an address value of the memory, and the date and time from the clock and the channel being recorded are written to the memory. At the time of reproduction, the address code of the VASS signal or the time code of the VASS signal is read, and the memory is designated by the address value indicated by the 4-bit BCD 4-digit user data following the address code header or the 4-bit BCD 4-digit user data of the time code. , Calling the recorded date and time and channel of the tape being played previously recorded in the memory, on the CRT of the television,
Alternatively, it is displayed on the time display section of the video recorder.

[0007]

Embodiments will be described below with reference to the drawings. FIG. 1 is a block diagram for explaining an embodiment of a magnetic recording / reproducing apparatus according to the present invention. In the drawing, 1 is a recording switch, 2 is a counter, 3 is a tuner, 4 is a calendar clock, 5 is a memory, 6 is a servo circuit, 7 is a control head, and 8 is an address path. The counter 2 counts up each time the recording switch 1 is pressed. The tuner 3 outputs information on the channel being recorded. The clock 4 having a calendar function outputs date and time information during recording. The memory 5 stores date and time information of the clock means 4,
The channel information of the tuner and the count value of the counter 2 are recorded as an address value. The control head 7 writes the count value from the counter 2 on the control track 10 of the magnetic tape 9 shown in FIG.

More specifically, the recording switch 1 is pressed, a signal indicating the recording mode is sent to the counter 2, and the counter 2 counts up by one. Counter 2
Keeps the previous value unless the power is protected by a lithium battery or the like and reset. Each time the recording switch 1 is pressed, the counter value increases. When the counter value advances to the maximum, the counter value is reset, but since it is 9999, there is no practical problem. The counter value c of the counter 2 is written into the 4-bit BCD four digits after the header of the address code of the VASS signal on the control track 10 of the magnetic tape 9 through the servo circuit 6 in FIG. Alternatively, it writes to the 4-bit BCD 4-digit user data of the time code of the VASS signal in FIG. At the same time, the channel value being recorded from the tuner 3 and the date and time from the clock 4 are written into the memory 5 using the counter value as an address value of the memory 5. A memory backed up by a battery or the like or a nonvolatile memory such as a flash memory is used as the memory.

At the time of reproduction, the address code of the VASS signal shown in FIG. 3 or the time code of the VASS signal shown in FIG. 4 is read, and 4-bit BCD four digits after the header of the address code or 4-bit BCD four digits of the time code is used as user data. The designated address value designates the memory 5, calls the recorded date and time and the channel of the tape being reproduced which have been recorded in the memory 5 in advance, and displays it on the CRT of the television or the time display section of the video recorder. And so on. Unless the address code of the new VASS signal or the time code of the VASS signal is input, the display contents on the CRT or on the time display section of the video recorder do not change.

[0010]

As apparent from the above description, the present invention has the following effects. That is, the data is written to the four digits of the 4-bit BCD after the header of the address code of the VASS signal. Alternatively, the counter value written in the 4-bit BCD 4-digit user data of the time code of the VASS signal acts as an identification signal, and the date, time, and channel of the tape being reproduced which were recorded in the memory at the time of reproduction are recorded. Since it can be called and displayed on a CRT of a television or on a time display unit of a video recorder, for example, a drama or a movie can be recorded, and a program that has accumulated without watching can be specified.

[Brief description of the drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a magnetic recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing an arrangement relationship between a control head and a magnetic tape in FIG. 1;

FIG. 3 is a diagram showing an address code according to the present invention.

FIG. 4 is a diagram showing a time code according to the present invention.

[Explanation of symbols]

1 ... Recording switch, 2 ... Counter, 3 ... Tuner, 4 ...
Clock with calendar, 5: memory, 6: servo circuit, 7: control head, 8: address path, 9: magnetic tape, 10: control track.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code Fig 11B 27/34 P

Claims (1)

(57) [Claims] A timer for outputting date and time information during recording; a tuner for outputting channel information during recording; a counting unit for counting up each time recording is performed; Storage means for recording information by means, recording information by the tuner, and recording the count value by the counting means as an address value; and a control head for writing the count value by the counting means on a control track of a magnetic tape. The magnetic recording / reproducing method comprises: reading a count value written on a control track of the magnetic tape at the time of reproduction, designating the storage means by an address value, and calling and displaying information at the time of recording. apparatus.