JPH0831999B2 - Camera integrated video tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention is applicable to the date and time as well as a microcomputer in a camera-integrated video tape recorder (hereinafter referred to as a camera-integrated VTR). The present invention relates to a camera-integrated VTR with a circuit for managing data.

Conventional technology In recent years, VTRs have become quite popular and their applications have expanded, while the demand for camera-integrated VTRs has increased significantly as the applications have shifted from viewing fun to recording fun. Is coming. In this trend, the functions desired for a VTR with a built-in camera are also desired to have high added value in addition to simply recording. Among these additional functions is the year / month / day / hour / minute display recording function, which counts time based on the data initially set by the microcomputer in the camera-integrated VTR and manages the year / month / day / hour data by a program. Integrated camera
By transferring the data to the character display circuit in the VTR and issuing a display command, the data for the year, month, day, and time are displayed in the electronic viewfinder (hereinafter referred to as EVF), and the magnetic field is recorded together with the recorded image. It is designed to be recorded on tape.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, since the data for the year, month, day and time are stored in the random access memory of the microcomputer in the camera-integrated VTR to count the time, Even in the off state, it is necessary to always supply only the minimum operating voltage to the microcomputer. As a result, if you are using the battery of the camera-integrated VTR as a backup, the data will be volatilized when the battery is not installed, so you need to have a dedicated battery for backing up the microcomputer separately from the main body. However, in the VTR with a built-in camera, weight reduction is the first requirement, but a large and heavy dedicated battery was needed to back up the microcomputer. Further, when the power is turned off, a circuit for switching to the backup circuit of the microcomputer is required, which makes the circuit complicated. Furthermore, since the microcomputer manages the data for the date and time, the program also occupies a considerable amount of capacity, which cannot be ignored in the limited program capacity, so even if other additional functions are installed. It becomes necessary to use a microcomputer with a large program capacity, resulting in extra cost.

In view of the above problems, the present invention allows a lighter dedicated battery to be used for a long time by providing a dedicated circuit with a low minimum operating voltage for managing data for the year, month, day, and date in a VTR with a built-in camera, and a backup circuit can be provided. An object is to provide a camera-integrated VTR that is unnecessary and contributes to reduction in size and weight, and that does not require a data management program for the year / month / date / time in the microcomputer for controlling the body of the camera-integrated VTR. It is a thing.

Means for Solving the Problems In order to achieve the above object, the video tape recorder with a built-in camera according to the present invention has one block for a period T _A having an initial pulse of a width t _O and a no clock period t _1, and a period t _{A. 2} of 8
Bit serial clock signal block and no clock period
As one block period T _B with t _3, a serial clock generator for generating a time series pulse group period T _O comprising the period T _A 1 block and period T _B from 5 block, heading adjustment to the initial pulse In addition, it is equipped with a data generator that serially generates year / month / day / hour / minute data by an 8-bit BCD code in synchronization with a clock sent from the next clock group.

Operation With the above configuration, it is no longer necessary to manage the data for the year, month, day, and day with the microcomputer in the camera-integrated video tape recorder that has been used in the past.
In R, the circuit can be simplified and the body can be made smaller and lighter,
Other additional functions will also have elements that can be incorporated at low cost.

Embodiment Hereinafter, a camera-integrated VTR according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the year / month / day / hour / minute display recording function of a camera-integrated VTR according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a data management circuit for date and time.
Is a correction / shift switch for inputting that the data management mode 1 is in the data correction mode and shifting the correction digit, and 3 is a correction / shift switch 2 for correcting the year / month / day / minute data when the correction mode is entered. Increment switch for incrementing the number of the place, 4 is a dedicated battery for supplying voltage only to the data management circuit 1
Reference numeral 5 is a system control microcomputer (hereinafter referred to as syscon) in a VTR with a built-in camera that exchanges data with the data management circuit 1 for year / month / date / hour. 6 Displays data from the syscon 5 and characters to be added to a video signal according to a command. A character display circuit, 7 is a camera unit for sending out a video signal, 8 is an electronic viewfinder for displaying the sent video signal, 9
Is a video recording unit for recording the video signal sent to the magnetic tape.

The camera-integrated VTR of the present embodiment configured as described above
The operation of the year / month / day / hour / minute display recording function will be described in detail below with reference to FIG.

From the time when the dedicated battery 4 is connected to the year / month / day / hour / minute / time data management circuit 1, the year / month / day / hour / minute data management circuit 1 operates and starts counting time. At that time, the data of year, month, day, hour, day and minute are initialized.
And the increment switch 3 are used to input the data of the current date and time. When the correction / shift switch 2 is turned on, the year data enters the correction mode, and each time the switch is repeatedly turned on, the correction point moves to month / day / hour / minute, and by turning it on again, the correction mode is released. And it becomes normal mode. In this correction mode, the data is incremented by turning on the increment switch 3 at the portion to be corrected. When the clock is sent from the syscon 5, the year / month / day / date / minute data management circuit 1 serially sends the year / month / day / date / minute data to the syscon 5 in synchronization with the clock. The system controller 5 converts the data sent from the year / month / day / hour / minute data management circuit 1 into data to be sent to the character display circuit 6, sends the data to the character display circuit 6, and sends a command to display the data. The character display circuit 6 generates characters for display based on the transmitted data, and the camera unit 7
It mixes with the video signal sent from. This video signal is sent to the EVF 8 and the video recording unit 9. The EVF 8 projects the video signal sent, and the video recording unit 9 records it on a magnetic tape.

FIG. 2 is a timing chart for explaining the data transfer between the year / month / day / hour / minute data management circuit 1 and the system controller 5. The year / month / day / hour / minute data management circuit 1 transmits data serially in synchronization with the clock sent from the syscon 5, and at this time, the data is sent in 8 bits from the LSB in the BCD code. In FIG. 2, (a)
Is data and (b) is a clock signal block. The clock is sent from the syscon 5 to the year / month / day / hour / minute / minute data management circuit 1 by 8 bits at a constant cycle. The year / month / day / minute / minute data management circuit 1 sends data to the syscon 5 in the order of year / month / day / hour / minute. To send. Syscon 5 is a camera integrated VT
Only when the power of R is turned on, the clock can be transmitted to the year / month / day / hour / minute / minute data management circuit 1, but since the year / month / day / minute / minute data management circuit 1 has the dedicated battery 4, the power is not turned off. Instead, the VTR with built-in camera is maintained in the state before it was turned off. Camera integrated VT in this state
When R is turned on and the clock is sent from the syscon 5 to the year / month / day / hour / minute / minute data management circuit 1, the year / month / day / minute / minute data management circuit 1 sequentially transmits the data when the power of the camera-integrated VTR is turned off to the syscon 5. However, since the data does not contain information about which of the year, month, day, hour, and minute data, the syscon 5 will receive the data sent at the first clock as the year data. Defect occurs. Therefore, as shown in FIG. 2 (c), the syscon 5 has a width to notify the year / month / day / hour / minute data management circuit 1 that the next clock is a clock for year data before transmitting the year clock. The initial pulse of t _O shall be transmitted. And after no clock period t ₁ ,
As one block period T _B with 8-bit serial signal block and the no-clock period t ₃ period t ₂ of (b), the sending of the five blocks of data content of YearMonthDayHHMM. At this time, the year data is limited to the last two digits of the year.

Next, a basic block diagram of one embodiment of the year / month / day / hour / minute data management circuit 1 is shown in FIG. 3, and its operation will be described below.

A clock sent from an oscillation circuit 11 to which a crystal oscillator is connected is frequency-divided by a frequency dividing circuit 12 to make a minute time, and a minute counter 13 counts it. The data counted up by the minute counter 13 is reset when it is counted up to 60, and a carry signal is sent to the hour counter 14, and when the hour counter 14 counts up and a carry occurs, it is called a day counter 15. The data counted up by each counter is sent to the next counter when a carry occurs, and the month counter 16 and the year counter 17 are also counted up. The power supply voltage detector 19 to which the dedicated battery 4 is connected detects the minimum operating voltage at which the data management circuit 1 for the year, month, day, hour and day operates reliably, and controls the voltage.
A circuit for supplying voltage to the control circuit 10 when the voltage supplied from the dedicated battery 4 becomes equal to or lower than the minimum operating voltage. The control circuit 10 controls the carry of the day counter 16, carries out control at the time of correction of date data, and controls output of data. The year counter 17 continues to count up as it is, and the minute counter 13, the hour counter 14, and the month counter 17 should always count up by the same amount and then send a carry signal to the counter to reset.
Since the number of the day counter 16 that counts up changes depending on the month and year data, the count number is 28,29,30,3.
Which of 1 is used is controlled by the data of the month counter and year counter at that time. Also, the correction / shift switch 2
In response to the input signal from, one of the year, month, day, hour and minute data counters is set to the correction mode, and the counter in the correction mode is counted up from the input signal from the increment switch 3. Further, when it is desired to initialize the year / month / day / hour / minute data, the reset switch 20 is input to initialize each counter of the year / month / day / hour. Finally, the data sent from the respective counters is taken out from each counter by the clock sent from the syscon 5, sent to the shift register 18 by an 8-bit BCD code, and output to the syscon 5 in synchronization with the clock. If any of the data to be transmitted at this time enters the correction mode and there is data, only that data is output as a BCD code from one of the codes from "A" to "F", and the correction mode is sent to the syscon 5. I will let you know that you are in. In addition, since the display order of the year, month, day, and time differs depending on the region such as Japan, the United States, and Europe, the control circuit 10 changes the order of data sent to the shift register 18 by inputting the data order selection input switch 21. The counter can be commanded.

According to the present embodiment as described above, since there is a circuit dedicated to managing the year / month / day / hour / minute data, it is not necessary to save the year / month / day / hour / minute data with the system control microcomputer conventionally provided in the camera-integrated VTR. , It becomes unnecessary to switch to the backup circuit of the microcomputer, and the microcomputer will only receive the data from the circuit dedicated to data management for year, month, day, hour and minute. As a result, it is possible to save the year / month / day / hour / minute data with a circuit dedicated to data management of the year / month / day / hour, which consumes less current than the backup of a microcomputer, and a smaller and lighter backup battery can be used for data storage. Can be used for a long time

According to the present invention, since the serial clock generator and the data generator that serially generates year, month, day, hour, and minute data are provided, the control microcomputer in the camera-integrated VTR is provided. Since the data storage for the year, month, day, and day is unnecessary, the amount of data processing can be reduced, and the backup for saving the data of the microcomputer is also unnecessary. As a result, the backup battery can be made smaller and lighter, and the total weight of the camera-integrated VTR can be made lighter, compared to the configuration in which the data for year / month / day / hour is stored in the conventional control microcomputer.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a year / month / day / hour / minute display recording function in a camera-integrated VTR according to an embodiment of the present invention.
FIG. 3 is a timing chart for explaining the operation of the camera-integrated VTR, and FIG. 3 is a block diagram showing the configuration of the year / month / day / hour / minute data management circuit of the camera-integrated VTR. 1 ... year / month / day / minute data management circuit, 2 ... correction / shift switch, 3 ... increment switch, 4 ... dedicated battery, 5 ... syscon, 6 ... character display circuit, 7
…… Camera part, 8 …… EVF, 9 …… Video recording part, 10 ……
Control circuit, 11 ... Oscillation circuit, 12 ... Dividing circuit, 13 ... Minute counter, 14 ... Hour counter, 15 ... Day counter, 16 ...
… Month counter, 17 …… Year counter, 18 …… Shift register, 19 …… Power supply voltage detector, 20 …… Reset switch,
21 …… Data order selection input switch.

Claims (7)

[Claims] _1. An initial pulse of width t ₀ and no clock period
The period T _A having t ₁ is one block, the 8-bit serial clock signal block of the period t _{2 and} the period T _B having no clock period t ₃ are one block, and the period T _A is one block.
A serial clock generator for generating a time series pulse group period T ₀ consisting of T _B from 5 block, the initial pulse in the head alignment of the 8-bit in synchronization with a clock sent from the next clock group BCD A video tape recorder with a built-in camera, which is equipped with a data generator that serially generates year / month / hour / minute data by code. 2. The data generator is provided with a memory circuit for supplying data for year / month / day and date, and a switch means from the outside for correcting the data for year / month / day / day of the memory circuit. A camera-integrated video tape recorder according to claim (1). [Claim 3] When the data for the year, month, day and time is to be corrected, only the data part of the correction digit in the data for the year, month, day, time and date is corrected and the BCD code from "A" to "F". The camera-integrated type video tape recorder according to claim (1), characterized in that either one of them is output alternately at regular intervals. 4. When the voltage of the dedicated battery connected to the memory circuit and the data generator falls below a certain value, all digits of year / month / day / hour / minute data and “A” to “F” of BCD code are compared with the clock. The camera-integrated video tape recorder according to claim (1), characterized in that one of the codes is alternately output within a fixed period. 5. A video tape recorder with a built-in camera according to claim 1, further comprising a switch means for selecting a data order for the year, month, day, and day transmitted by the data generator. 6. A memory circuit, wherein an oscillation circuit for generating a reference clock for counting time, a frequency dividing circuit for generating time from the clock from the oscillation circuit, and a minute counting from a signal from the frequency dividing circuit. A minute counter, an hour counter that counts time from a carry signal from the minute counter, a day counter that counts days from a carry signal from the hour counter, and a carry signal from the day counter It controls the carry of the month counter that counts the number of months, the year counter that counts the number of years from the carry signal from the month counter, and the day counter that changes the carry count depending on the year and month. , Controls the shift of the correction counter and the up / down control of each counter when correcting the date data. The control circuit for instructing to transmit data in sequence from the counter, the supply voltage drop signal from the dedicated battery when the supply voltage from the dedicated battery is below the minimum operating voltage, and the supply voltage from the dedicated battery is the minimum operating voltage. The camera-integrated video tape recorder according to claim (1), characterized in that it is configured to include a power supply voltage detector that sends a signal indicating a decrease in supply voltage to the control circuit if 7. The data generator comprises a shift register for serially outputting data sent from a memory circuit in synchronization with a clock sent from a serial clock generator. A video tape recorder with a built-in camera according to item (1).