JP2728560B2 - Magnetic recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording device, and more particularly to a condition for imprinting a date and time.

[Conventional technology]

Conventional video camera is a video salon, October 1986,
As described on pages 44 to 49 of "Video8 PRO" published by Genkosha, date and time stamps are recorded with the video camera body by recording the date and time of shooting with one touch by incorporating a memory that stores the calendar in the video camera body. Had a function. This has been a very useful feature when recording a child's growth record or event.

This will be described with reference to the conventional example shown in FIG. First, the date and time are imprinted on the system control microcomputer 2 by the operation button 1.
Is instructed. System control microcomputer 2 is OSD circuit 3
Then, control is performed so that the date and time information of the timer circuit 6 is added to the video signal from the camera unit 4. The timer circuit 6 counts time and has date and time information. The video signal to which the date and time information is added is converted into a recording signal by the recording system circuit 5 under the control of the system control microcomputer 2 and recorded on a magnetic tape (not shown).

[Problems to be solved by the invention]

In the above prior art, to record the date and time, it is necessary to press a predetermined button to enter the date and time imprinting state, and to stop recording, press the predetermined button further to cancel the imprinting state. I had to. For this reason, in many cases, it has been limited to either imprinting from the beginning to the end of shooting or not printing at all.

It is an object of the present invention to automatically imprint the date and time of shooting for a certain period of time at the beginning of recording when performing the first shooting of the day or the first shooting after exchanging the tape. .

[Means for solving the problem]

The above object can be achieved by storing in a memory a flag indicating whether it is the first shooting of the day or the first shooting after changing the tape, and controlling the imprinting of the date and time based on the flag. .

[Action]

The system control microcomputer controls the recording system circuit and the OSD (ON SCREEN DISPLAY) control circuit based on information from the operation buttons. The timer circuit has date and time information, and supplies the information to the OSD circuit and the OSD control circuit. The OSD control circuit uses the system control circuit, timer circuit, and memory
Controls the D circuit. The memory stores the first record of the day or the first record after the tape change. OSD
The circuit adds the date and time information from the timer circuit to the video signal from the camera unit and outputs it to the recording system circuit. The recording system circuit converts the input signal into a recording signal and records it on a magnetic tape.

〔Example〕

An embodiment of the present invention will be described with reference to FIG. An OSD control circuit and a memory are added to the conventional example. First,
The operation button 1 instructs the system control microcomputer 2 to record. The system control microcomputer 2 includes an OSD control circuit 7
To enter the recording state. The OSD control circuit 7 stores the date and time information of the timer circuit 6 and the control signal (recording and tape removal) of the system control microcomputer 2 in the memory 8.
Control data. The data in the memory 8 is initially set to "1", set to "0" when recording is performed, and set to "1" when the date changes or when the tape is removed. In other words, "1" until the first recording of the day or until the first recording after the tape is changed,
It becomes “0” after recording is performed once. The OSD control circuit 7 controls to add the date and time information of the timer circuit 6 to the video signal from the camera unit 4 only when the data of the memory 8 is “1”. The video signal to which the date and time information is added is converted into a recording signal by the recording system circuit 5 under the control of the system control microcomputer 2 and recorded on a magnetic tape (not shown). However, the OSD control circuit 7 measures the time from the start of recording and controls so as to stop adding the date and time information to the video signal in a fixed time.

For this reason, the date and time information is recorded on the magnetic tape for a certain period of time during the first recording of the day or the first recording after the tape is replaced.

In this embodiment, the OSD control circuit and the memory are provided separately from the timer circuit. However, both can be realized by software, and can be made into one chip by using a microcomputer together with the timer circuit.

〔The invention's effect〕

According to the present invention, the date and time information can be automatically recorded on the tape only for a certain period of time during the first recording of the day or the first recording after the tape change, and the date and time information is recorded forever. It is possible to prevent the adverse effect of being in the way.

In addition, since the date and time information, which is the original purpose, can be recorded without forgetting each time the date changes and each time the tape is replaced, it is convenient for recording the growth of a child, photographing an event, and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention, and FIG. 2 is a block diagram of a conventional example. 1 ... operation buttons, 2 ... system control microcomputer, 3 ... OSD circuit, 4 ... camera unit, 5 ... recording system circuit, 6 ... timer circuit, 7 ... OSD control circuit, 8 ... memory.

Claims (1)

(57) [Claims] 1. A magnetic recording apparatus having a function of recording date and time information such as recording date and time on a magnetic tape, a timer circuit for generating the date and time information, and a video signal recorded on the magnetic tape. An OSD circuit for adding the video indicating the date and time information, and detecting the first recording of the day and the first recording after the magnetic tape exchange, and automatically detecting the start of the recording when any of these is detected. And a control means for controlling the OSD circuit so as to record an image indicating the date and time information for a predetermined time.