JPH0244568A - Sound recording device for still video camera - Google Patents

Abstract

PURPOSE:To simplify constitution and to easily execute operation by providing a means to be operated in the middle of the input of a sound to a sound memory, to stop an operation of a sound input means and to prohibit an operation of a sound storing means. CONSTITUTION:In order to display intension to desire to stop recording in the middle of the recording by an operator, since operation is set to turn off a switch S1 and to turn on the switch again, the sound memory is finished. When a switch S0 is turned off, this time of the recording is defined as the display of the intension to stop the recording from the beginning and the sound memory is reset. Then, the recording processing of the sound is not executed. When additional recording is desired to be executed, a switch S3 is pushed. When the switch S3 is once pushed, increment is executed only by 1 for the count of the S3 and a recording time is set again. Then, the additional recording can be executed only by the number of the S3 count. Thus, when it is noticed that the recording is unnecessary or the recording is failed during the recording, the operation can be easily executed by the turning-off operation of a main switch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio recording device for a still video camera having a recording function: η.

[Prior Art] Conventionally, still video cameras that are capable of not only recording video but also sound recording have been proposed.

Due to the location of the magnetic floppy disks used for recording, it is possible to record 9.6 seconds for each image pickup, and during playback, the audio can be played back at the same time as the video.

By the way, if you record one track along with recording one screen of video, it will take about 10 seconds from the start of imaging to the end of recording, but if you fail to record midway through recording or if you do not intend to record audio, it will take about 10 seconds. In some cases, when I took a picture without realizing that the camera was in recording mode, I had to perform a cumbersome operation to erase the sound once the recording had started.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned problems of the conventional art. To provide an audio recording device for a still video camera that can move to a state where the next recording can be performed without recording the previous audio by simple operation when the recording is unnecessary. .

[Means for Solving the Problems] The present invention includes means for recording images, audio input means for storing audio in an audio memory, and audio recording means for magnetically recording the memorized audio on a floppy disk. The audio recording device for a still video camera is provided with means that is operated during the input of audio into the audio memory to stop the operation of the audio input means and to inhibit the operation of the audio recording means. As the operating member of the above means, the main switch of the camera (change to OFF) can be used.

[Operation] According to the above configuration, it is possible to immediately stop inputting audio to the memory even during recording, and to reset the memory contents without recording the memorized audio to a floppy disk.

[Effects of the Invention] According to the present invention, when one realizes that recording is unnecessary or that recording has failed during recording accompanying one image recording, the previous recording can be performed with a simple operation. It is possible to make the next image recording possible without recording audio. Moreover, by performing the above operation by turning off the main switch of the KARURA, there is no need to provide a separate operating member, and the structure can be simplified and the operation can be facilitated.

[Embodiment] FIG. 1 shows a block configuration of an embodiment of a still video camera equipped with an audio recording device of the present invention.

In the figure, ■ is a central processing unit (hereinafter referred to as CPU) that controls the entire camera, and 2 is a group of persimmon switches that input command information etc. to the CP IJ (details will be described later).
, 3 is a power supply circuit section, which includes a main battery 4, a booster circuit 5 for obtaining power for the CCD (described later), a back amplifier battery 6,
It consists of a regulator 7 and the like for obtaining power for the CPU and general circuits.

Reference numeral 8 denotes an autofocus (AP) circuit section, which includes an AF circuit 9 that outputs focus and distance information to the CPUI, a lens extension motor 10, a lens stop magnet 11, and a lens position detection encoder 12. 13 is a lens switching/barrier opening/closing circuit; 14 is its motor; for example, when the motor 14 rotates forward, the lens is sequentially switched between standard and close-up; when the motor 14 rotates in reverse, it is located in front of the lens, and has the function of an optical path shielding plate. The barrier is then opened and closed.

Reference numeral 15 denotes an automatic exposure (AE) circuit section, and this circuit section 15 has an automatic exposure (AE) circuit section that receives as input the detection signal of the photometric element SP that measures the brightness of the subject at the center spot of the photographing screen by 4191 lights.
A μm ahead circuit 16, a photometry circuit 17 that receives as input the detection signal of the photometry element AVE that measures the brightness of the subject in the peripheral area of the photographic screen.
, an A/D conversion circuit 18 that A/D converts these detected data, a serial communication interface 19 that receives this A/D converted data and performs serial communication with the CPU, and commands from the CPU that are input via the interface 19. Based on the weighting cycle i, weighting is performed between the detection data as described below so as to obtain appropriate exposure.
? 820, a level shift circuit 21 that shifts the level of a signal based on the output of this weighting circuit 20 and a command from the CPU without intervening the interface 19.

Reference numeral 22 designates a circuit section for controlling the actual opening timing of the CCD shutter based on the output from the AE circuit section 15, which short-circuits the capacitor 25 by opening the timing capacitor 25 at the shutter opening timing. The connection point potential ■ between the switch 26, the capacitor 25, and the output part of the level shift circuit 21 is set as a reference reference potential V.
It consists of comparators 27, 28, etc. whose axes are proportional to Q and Vl.

23 is the release signal and C for shooting the CCD shutter.
A control circuit that opens based on a pulse signal from the CD driver 32 and closes when a predetermined exposure is obtained by the output of the comparator 28 of the circuit section 22 or a forced close signal from the CPUI, A shutter opening/closing signal is output to the CPUI and CCD driver 32.

Reference numeral 24 is a gain control discrimination circuit, which detects when the predetermined exposure (exposure amount less than the appropriate exposure by a predetermined amount) is not obtained even after the camera shake limit time is exceeded based on the output of the comparator 27 and the close signal from the shutter control circuit 23. etc.,
A signal for electrically controlling the gain of the video recording image signal is given to the CPU 1.

29 is a microphone for recording, 30 is an audio circuit that operates in response to a recording control signal from the CPUI, and the output of this audio circuit 30 is given to a video recording circuit 34, which will be described later.

31 is a CCD image sensor (hereinafter referred to as CCD), which is a solid-state image sensor that converts optical image information into an electrical signal;
2 is a driver that drives the CCD 31, and this CCD driver 32 receives the output of the above-mentioned COD shutter control circuit i\823, the ISO sensitivity switching signal from the CPU, the synchronization signal PG generated in synchronization with the rotation of the floppy disk, etc. Operate.

34 is a video recording circuit for magnetically recording images and audio onto a floppy disk, and 35 is its magnetic head. In addition to the image signal from the CCD 31 and the audio signal from the audio circuit 30, the video recording circuit 34 receives It operates in response to a digital information signal (year, month, day, track spacing, etc.) displayed simultaneously with the image on the image screen, a gain control output, and a synchronization signal PG.

36 is a spindle motor driver for driving the floppy disk to rotate at a constant speed according to a command from the CPUI, and 37 is a spindle motor.

38 is the magnetic head 35 according to a command from the CPUI.
The stepping motor driver for moving the 3 is a stepping motor, and this stepping motor 3
9, the magnetic head 35 is controlled to move to a predetermined track position on the floppy disk. 40 is a head holding plunger for setting the head at a predetermined position during recording (writing).

41 is a flash that emits light when the exposure amount is insufficient during shooting, etc. It has a built-in charging circuit and booster circuit for flashing, and starts boosting operation by a boost signal from the CPUI.
Based on the charge completion monitor signal from the PUI, a charge completion signal is output to the CPUI when charging is completed. Also, CPU
The flash is emitted by the light emission power signal from I. 42 is a reset circuit for preventing abnormal operation when the power supply drops, and 43 is a reset circuit when the COD shutter is opened in a mode using a self-timer during shooting.
4.1 is a buzzer that generates a sound to alert the user when the decker of the computer inserter is left open, 45 is a CPU This is a display unit that is activated by the output of the camera and displays various camera information, setting modes, etc. on a CD or the like.

The components of switch group 2 include main switch SO1; switch 3 for performing photometry and distance measurement prior to photographing;
1. A release switch S2 for performing a photographing operation, a recording switch S3 for selecting a recording mode or not.
Switch between single shooting modes (S, which is the standard mode), continuous shooting (C), which takes multiple photos, and self-timer shooting (SELF). Switch S4. Date information changeover switch S5, date i~=h1 report correction switch S6, switch S7 that detects the opening/closing state of the deck device, switch S8 that detects the insertion state of the floppy disk, switch S9 that detects the presence or absence of the write-inhibiting claw on the floppy disk. ,”-a switch S10. which detects the open and closed positions of the barrier. S11,
A switch 312 for detecting the initial position of the lens, a lens changeover switch 313 for setting the lens in a close-up state during close-up photography, a switch 314 for detecting the close-up lens position (close-up state) and the extended position (standard state), respectively. 315 and a switch 316 for detecting the initial position of the magnetic head.

Here, the CPUI is equipped with various a function configurations such as a self-timer means and a sequence control means to be described later, and setting information such as the recording switch S3 and the mode changeover switch 84 is inputted by the user before 1fii and is stored in the CPIJI. Based on this memory information, the CPU
I executes a predetermined program operation, and camera operations such as recording and recording are performed.

Particularly, in the present invention, when the self-timer mode is selected and set using the mode selector switch S4, recording is performed during the self-timer count before taking an image, whereas when the self-timer mode is not selected, recording is performed after the end of taking the image. , the sequence is automatically switched using the CPUI.

Hereinafter, the operation of this camera will be explained according to the flowcharts shown in FIGS. 2 to 7.

Figure 2 shows the main flowchart. In the figure, when the power is turned on to the CPUI, CPU1 is reset (#1), the reset flag is set to rl, and #2), the flags and RAM are initialized, and the lens Initial settings are performed to set the magnetic head 35 to the initial position (#3). In addition,
If this reset flag remains "1", it means that the date has not been corrected as described later, and such date information is not recorded on the floppy disk, and some parts of the LCD etc. Warns by flashing. Next, check to see if there is a battery (#4); if there is no battery, execute the battery removal routine (#5); if there is a battery, check the state of the main switch SO (#6).

If the same switch SO is currently ON, check the open/open state of the deck, the presence or absence of a floppy disk, the presence or absence of a recording prohibition claw, and whether the deck profit has just changed from open to closed (#7
~ #10) If the deck profit is immediately closed, the initial TT7-code routine will be used to record the unrecorded information on the floppy disk.
- The rack is located and the magnetic head 35 is moved to that position (#11).

After that, if the judgment in #10 becomes No, check the status of the photometry/distance measurement switch S1 (#12), and if it changes from OFF to ON, perform the photometry/distance measurement, exposure, and subsequent various steps. The S1 sequence (shown in FIGS. 3 and 4) consisting of the following is processed (#13 and #14). If the switch S1 is OFF or has been ON for a long time, the process does not proceed to S1 sequence, but the state of the lens close-up switch 313 is checked (#15), and when it is turned ON, the lens switching routine (#16) is started. ).

Next, check the state of the mode selector switch S4 (#17
), when this is turned on, the date flag is set to "0", and if it is in the date switching correction mode, the correction mode is exited (#18), and the mode change routine (#19>
process. Through this mode change process, as mentioned above, the operation mode of single, continuous shooting, or selfie is memorized. 6 Next, check the state of the recording switch S3 (#201, if this is turned on, the same operation will occur) Then, the date flag is set to 0, and if the date switching correction mode is selected, the correction mode is exited (#21) and the recording switching routine ($22) is processed.

Each of the close-up switch 313, mode changeover switch S4, recording switch 83, etc. changes to a different state each time it is pressed (turned on), and returns to the original state when pressed as many times as there are existing states.

After that, check the status of the date selector switch S5 (#23
), when this is turned ON, the date flag is set to "1" and the date switching correction mode is entered (#24), and the reset flag is set to "0" to enable recording of date information.
25) After a predetermined period of time has elapsed, start a date timer to exit this switching correction mode (#26).
, process the date switching routine (#27>. Then,
Look at the date flag (#28>, this or rl), and if the date correction switch S6 is turned on, start the above date timer anew (#29 and #30), and perform a date correction routine (#31). When the date correction switch 36 is OFF and the date timer time elapses (#
32 (YES), set the date flag to “0” (#33
), exit the date cut/correction mode. In addition, S
As will be described later in 1 Sequence, even if the photometry/distance measurement switch S1 is turned ON, the date switching correction mode is exited.

After that, check whether the care pressure of the charging circuit of the flash 41 is necessary (#34), and if boosting is necessary, check whether charging is complete (#35), and if not, start boosting the pressure.#36) , return to step #4 above. Also, when the main switch SO is OFF in #6 above, and #34 above. If boosting is not necessary in #35 or charging is complete, stop boosting the voltage (#37), start the first timer that measures the non-operation state (#38), and wait until a predetermined time has elapsed (#37). Check the open/closed state of the deck lid (#44) and check if it is open or open until a predetermined time period according to the second timer (described later) has elapsed (#45). , switches So, Sl, S3. S4.
Look at the changes in the state of S5, 36 and deck lids (#
47), if there is a change, return to #4 above; if there is no change, return to #39.

Also, when the predetermined time set by the first timer has elapsed in #39 above, check the setting mode (#/10), and if it is selfie or quick shooting mode, change to the standard single mode (#41). , further check the condition of the lens (
#42) If the mode is close-up, change to standard #43>, proceed to #44 above.Also, when the predetermined time set by the second timer has elapsed in #45 above, the user is prompted to use the buzzer 44. Issue a warning (#
46). As is clear from this flowchart, no input is accepted when the deck lid is open.
It is only possible to modify the date.

Also, if the deck lid is open in #7 above, proceed to #48, and if it has just changed from closed to open, start the second timer (#49) and continue until the predetermined time elapses. and #8 above. If there is no floppy or no claw in #9 (in other words, recording is prohibited), stop boosting the pressure and press (#9).
51), without checking the status of the switch 81, etc., proceed to #23 above, and when the predetermined second time elapses, issue a warning in the same manner as above (#52). Further, when the deck is in a closed state, the warning is stopped (#53).

Next, an example of the S1 sequence of #14 will be described with reference to FIG. In this example, recording is prohibited during continuous shooting, and recording is performed after continuous shooting; however, when the self-mode is selected, recording is performed during the self-timer.

In Figure 3, first stop the voltage boost to prohibit charging during recording/recording (#61), and set the date flag to "0".
”, that is, turn on the switch S1 to exit from the data 1 to switching correction mode) (#62), check whether the self mode is stored in memory (#63), and immediately enter recording standby if it is not self mode. In order to
), if the self-timer is counting, the spindle motor 37 is turned off at this point to save power while the self-timer is counting.
Do not turn on.

Next, J! II distance and c1!11 light/AE described later
After processing the calculation routine (#65, #66), it is checked from the calculation result whether or not boosting is necessary (#67), and if it is not necessary, wait for the release switch S2 to be turned on (
#68). When the spinch S2 is turned on, it is checked whether the self mode is stored in memory (#69), and if it is not the self mode, it immediately processes the self sequence (#70), which will be described later, and the spindle After turning on the motor 37 (#71), open the barrier (#72), operate the lens extension motor 10 to extend the lens to the in-focus position (#73), and process the release routine (#74) described later. Then, the image is recorded on the floppy disk by a recording device such as the video recording circuit 34 (#75). In this recording step, the year, month, day date/h1 information and 1 to rack numbers are also recorded at the same time. Note that when the camera is not in self-mode, recording is performed after the image is taken, so nothing has been done at this point.

After that, the magnetic head 35 is sent to the next empty track (
#76), reset the lens #77), check the memory information of mode selection and whether it is continuous shooting mode (#78),
If not in continuous shooting mode, reset continuous shooting flag 2#
79) To finish recording the image, turn the spindle motor 37 to 0FFL (#80), close the barrier (#81), and return the lens to the standard position. (#82.#83).

Furthermore, if it is not the self mode (NO in #84), check the memory information according to the setting of the recording switch S3 (#85
), if it is in recording mode, the recording operation begins. Set the recordable timer time T of the audio memory to 9.6 seconds < s (#86) and start the audio memory (#87). Then, the timer counts down and checks whether it is 1 - 0 (#88), and before it reaches that point, the 1tll light/distance switch S1 or OI' I? Check whether the switch is turned ON (#89). In order to indicate the operator's intention to cancel Recording 11 midway through, switch S1 is set to be turned ON again from 0FFL. #89 is YE
S, that is, to stop recording, set the 83 count to "0"(#90), which will be described later, and end the audio memory (#9
5).

If No in #8 above, check the state of the main switch SO (#91), and if it turns OFF, reset the voice memory as an expression of intention to stop the current recording from the beginning (#92), and record the voice. The process moves to #4 in the main flowchart of FIG. 2 described above without any processing. #91 above
If the main switch SO remains ON, then check whether the recording switch S3 has changed from OFF to ON (#
93).

This is because if the user wishes to make additional recordings for one captured image, the user can indicate his/her intention by pressing the recording switch S3. That is, the recording 'switch S
When 3 is pressed once, the S3 counter 1~ is incremented by 1 (#94), and the process returns to #88. As this 83 count is incremented, the process returns from #00 to #86 via #101, as will be described later, and the recording timer is set again, allowing additional recording by the number of 83 counts.

When the timer reaches T=O, end the audio memory #95
), the spindle motor 37 is turned on (#96), and audio is recorded (#97). Here, trunk No.
, and the audio compatible track number are recorded, but date information such as year, month, and day is not recorded.

Next, the magnetic head 35 is moved to the next empty track (#
98), turn off the spindle motor 37 (#99
), the 33 count is checked (#100), and if it is "0", if the mode is self-shooting or continuous shooting, it is returned to the standard single mode (#102.8103), and then the process returns to #4 of the main flowchart. Further, if the S3 count is not 0 in #100, the S3 count is decremented over l- (#101), and the process returns to #86. Additional recording is thus performed.

Note that if it is not the recording mode in #85, the process moves to #102 without processing the steps of the recording operation described above.

Also, if continuous shooting mode is set in #78 above,
The continuous shooting flag 2 is set to rl (#104), the process returns to #65, and the above routine is cyclically processed to execute continuous shooting. Here, there is no recording during continuous shooting.

Also, the above #68', release switch S2 or
x r;' or if it is OFF, check the quick shooting flag 2, and if continuous shooting is not in progress, check the opening/closing status of the shutter 'r'1lff, the status of the main switch SO, and the status of the photometry/distance switch S1. Research each (#106 to #108)
, if each is closed, ON, or ON, return to #66,
If you get 3 hits on Open, OF, or 0 DoF, the process moves to #4 of the main flowchart.

On the other hand, if the continuous shooting flag is 2 or r 1 in #105, then
During the continuous shooting operation, the process moves to #79 above.

On the other hand, if it is determined in #67 that the voltage needs to be boosted, check whether charging is completed (#109), and if charging is completed, check #
Proceed to step 68, but if charging is not completed, check whether there is bright backlight (#110). If the result is bright backlight and the release switch S2 is turned on (YES in #111), the above Proceed to #69, but otherwise check the continuous shooting flag 2, which indicates whether continuous shooting is in progress (#112) - If continuous shooting is in progress here, the so-called uncharged lock (in the middle of continuous shooting) is checked. (occurs when it gets dark), stops continuous shooting and proceeds to #79 above.If 6 consecutive shots are not in progress, spindle motor 37 is turned off to save power while charging.
F (#1t3>, start boosting the voltage (#114). After that, check whether charging is completed (#115), and if charging is completed, stop boosting the voltage (#116), and check again whether there is bright backlight. Check (#117), and if YES, turn on the spindle motor 37 (#11.8>, return to #66 described in -). If NO, return to #4 of the main flow.

Also, if charging is not completed in #115 above, the deck gain,
Main switch SO, ;l! II light/distance switch S1
(#11") to #121>. If they are closed, ON, or ON, check whether there is bright backlight. If the backlight is bright, check the status 71 of the release switch S2 (#123) 1 .,: If it is ON, stop boosting the voltage while waiting for charging to complete. #1211), spindle motor 3
7 to 0N (4t125) and start shooting. (Proceed to #69). Also, if the judgment in #122 above is No, that is, when it is dark, or in #123, release switch S2 or OF
If F, return to #115 above. Also, #119 above
～#121 opens the deck profit and the main switch SO turns OFF.
F. When the photometry/distance measurement switch S1 is OFF, the process exits from the S1 sequence and moves to #4 of the main flowchart.

Note that if the self mode is stored in memory and the sequence (#70) of the same mode is not processed, the self mode has already been recorded. Since step (2) has been completed, proceed directly to #96 from #84 above.

The S1 Sequence, shown in Figure 3 of E, records (records) after continuous shooting.
However, as will be described later, an embodiment in which recording is performed during self-timer counting will be described below with reference to FIG. 1, but an embodiment in which recording is performed during continuous shooting will be described below.

In Figure 4, between this solid line, if continuous shooting mode is used, #
The process advances from 78 to #104, and after setting the continuous shooting flag 2 to "1", a recording operation is performed. In other words, Thailand? T=9.6 seconds (
s) should be set #201>, and the voice memory should be started #
202>, T-0, and the process returns from #203 to #65. From then on, this routine is repeated to perform continuous shooting and recording.

When T=O, end the audio memory #204>, set continuous shooting flag 2 to "0"#205>, and close the barrier (#
206), after returning the lens to standard (#207)
．． #208), skipping the recording routine and proceeding to #97 to record the audio.

Also, go from #68 to #105, and here continuous shooting flag 2
If it is "1", it is determined that continuous shooting is in progress, so set the continuous shooting flag 2 to "0"#209>, turn the spindle motor 37 to 0FPL (#210), and close the barrier (#211).
), after returning the lens to standat (#212. #
213), the process moves to #88, and recording continues for the remaining time of the timer. Also, if the continuous shooting flag 2 is "1" when proceeding to #]12 with the uncharged lock, the above #
Similar to steps 209 to #213, continuous shooting is stopped in steps #214 to #218, and the process moves to #88.

In addition, in this embodiment, additional recording cannot be performed after 9.6 seconds have elapsed during continuous shooting, and continuous shooting ends after 9.6 seconds have passed (when switch S2 is off or 17 seconds have not been charged).
If you do so, you will be able to record additional audio. Furthermore, in order to reduce the time lag during continuous shooting, the barrier is kept open during continuous shooting using the 81 sequence shown in FIGS. 3 and 4.

Furthermore, the corresponding image tracking number of the audio during continuous shooting can be made to correspond to the first (first stage of continuous shooting) track number, or to all track numbers.

Next, repeat the self mode sequence in #70 above in the fifth step.
This will be explained using figures.

Set timer T to 9.6 seconds (s) #3゜t), f
Start voice memory and self-count #302. #
303), during timer counting, flash the LED to indicate that self-counting or recording is in progress (#305), and during recording, #306. #30
When the deck is opened at 8 or the main switch SO is turned off, the sound μf memory should be reset, considering it as an expression of intention to stop recording from the beginning with self-release #308
), return to the main flowchart. When recording or timer count-up has been completed (YES in #304)
, exit audio memory #309) # of S1 sequence
Move to 71.

In addition, to record the audio memory to the floppy disk in self mode, after recording the image (#75 in Figures 3 and 4),
This is done in #97. Also, L during self-counting
The flashing LED was used to indicate the self-count and recording in progress, but this selfie LED is also used to indicate that recording is in progress when recording during normal shooting (for example, single mode). You may also do so.

Next, #66 photometry/AE in the above S1 sequence
The calculation sequence will be explained with reference to FIG.

1 optical element SP, AVL', and photometric circuit 16
, 17 Ni'l! Perform II light (#401), photometry 7
−? - The log data is A/D converted by the A/D conversion circuit 18 and taken into the CPUI (#402 to #404).

Next, check whether the AF is locked without pressing the switch S1 or not.
Subtract 8 v 1 to find the brightness difference ΔBv (#406)
, subtract a predetermined correction value α according to ΔBv from the photometric value Bv1 of the spot to find the main subject brightness 13vs (#407), and also calculate the above Abe photometric value Bv2 as the background, that is, the sub-subject brightness 13vA. (#408).

Also, if the AP is locked in #405, #406. #40
Proceed to #408 without processing step 7. Here, #4
The AP lock is achieved at 05 only when the photometry/AE calculation is performed by moving from #108 to #66 in sequence 81 in FIGS. 3 and 4.

Next, check whether the lens is in a close-up state (#409), and if NO, calculate the difference between the sub-subject brightness BvA and the main subject brightness BvS calculated above, that is, the degree of backlighting ΔBvS (#410>, Compare this value with the backlight detection level δ (#411). If ΔBvS is smaller than δ, it is assumed that the degree of backlighting is small (frontlighting), and the weighted main subject brightness [3 vs -, 1/8 B v S
+7/8 B vA is used (#412). On the other hand, #4
If ΔBvS is larger than δ in 11, the degree of backlighting is considered to be large (backlighting), and a backlight flag is set as "1"#4
15), BvS is set to Bvs-<#416).

These weights are performed by weighting circuit 20 (FIG. 1).

Subsequently, when J-H self #412 is processed, B
vs- or ■ Check whether the brightness of the camera shake limit is greater than or equal to B v 0 (#414), and if it is YES, it is determined that the camera shake limit is brighter than the brightness, and the camera enters natural light shooting mode ■. If the camera determines that it is dark, it enters dark flash photography mode■. Also, when the process in #416 is performed, check whether the sub-subject brightness BvA minus the backlight detection level δ is greater than the camera shake limit brightness 3v0 (#417), and if YES, bright backlight is detected. Therefore, set the reversible flag [11 and #418] and enter backlight flash photography mode ■.On the other hand, if No, it is backlit or the background is dark, so dark flash photography mode ■
to go into.

First, natural light photography mode (2) will be explained.

In this mode, the initial setting ISO sensitivity SvO determined by the CCD 31 corresponding to the film is set as the sensitivity (fi Sv
Toshiki #419), the maximum brightness nvM at which proper exposure can be controlled when the subject brightness is extremely bright is determined by the maximum shutter speed T v M and the values Av and C corresponding to the lens aperture.
From f/jsv (both apex values), which corresponds to the sensitivity of CD, B v M = T v M + A v
-S v (#420).

Next, r3vs- obtained in #412 above and 1'
Compare the magnitude of 3vM #421) If Bvs is larger than BvM, it is too bright, so set the sensitivity value Sv to 5vO
-1 (#422 If L-r3vS- is greater than 13vM, the above process #422 is not performed, it is determined that boosting is not required (#423), and the process moves to S1 Sequence.

Next, the dark flash photography mode (2) will be explained.

In this mode, compare the main subject brightness BvS plus 1Ev with the camera shake limit brightness Bv II #42
4) If BvS+1 is not smaller than BvH, set the main subject brightness BvS plus IEv as the control brightness ftj I3 v T (#425). As a result, the main subject can be photographed from an appropriate value using only natural light. Only IEv will be undershadowed by tm. On the other hand, BvS+1
or B v J- (If it is smaller, the main subject is dark, so
As the control brightness value Bv', the camera shake limit brightness Bv)
Set I (#426).

Furthermore, in order to calculate the correction value for flash dimming, we use the value ΔEvN, which does not indicate how much the main subject will be undershooting when photographed using only natural light, as the main subject brightness Bv.
Determined from the difference between S and the above control brightness value 13 v T (#42
7) Check whether this value ΔEvN is greater than IEv (#428), and if it is, set ΔEvN to -IEv #429), then check whether ΔEvN is less than 15 Ev (#430), If YES, correction value K
#431), if NO, that is, ΔEv
When N is between -1 and -3, the correction value K is (1/2)ΔE
v N -1-(3/2>) (#432).

Next, check whether the main subject distance is 5m or more (#4
33), if the distance is 5m or more, the flash dimming correction value ΔE
Set vFL to the above correction value +0.5 #43'l
), if it is less than 5 m, the synchronization light correction value ΔE v F
Set L to the above correction value (#435).

Next, set the initial setting ISO sensitivity SvO to the IS of the CCD31.
The controllable maximum brightness BvM at the brightest time is determined by the maximum shutter speed rvM, the aperture value AV of the lens, and the upper sensitivity value Sv, I3 v M = T v M+Av−Sv
After (#437), the i control brightness (lfiD v
Check whether T is greater than or equal to the maximum controllable brightness 1'3 VM found in Section 4 (#438). If the result of this comparison is YES, it means that it is bright and the ISO sensitivity Sv
#439), and then similarly T v M + as the maximum controllable brightness BvM- at this time.
-A v -S v (#440m again check whether the control brightness value BvT or the maximum controllable brightness BvM - or less) (#441), and if the comparison result is YES, check the transparent flag (#441). 442), If the same flag is set, compare the main subject brightness BvS and the maximum brightness value BvM- mentioned above. Since it is not, set the transparent flux to "0"(#144) and shift to natural light photography mode ■.

Above #438. Comparison result of #441 and #443 is N
O, and when the clear flag in #442 is 0, go to #445 and control the flash emission timing 'v from the brightness 1^nvT, l5oHB degree value Sv and lens aperture value Av]' Let v = B v T +S v −A v. Furthermore, it is checked whether the flash emission timing Tv is greater than or equal to the maximum shutter speed TvM (#4
46) If Tv is smaller than TvM, check whether the same timing Tv is below the touch limit shutter speed TvH (#447), and if TV is larger than TvH, 1゛ obtained in #445 above. Leave V as it is, set a flag indicating the need for boosting (#448), and proceed to Sl sequences. In addition, when the determination in #446 and #447 is YES, Tv is used as TvM (#449
), set 'I''vl-1 (#450) and set #4
=18＼Go forward.

Next, the backlight flash photography mode (2) will be explained.

In this mode, the sub-subject brightness BvA-1 is used as the control brightness value BvT (#451). As a result, when the main subject is properly exposed, the background will be photographed with an overexposure of IEv. After the process of #451, the process moves to #/127, and the same process is performed thereafter.

In addition, in #409 above, if the lens is in a close-up state, proceed to #452, and the camera shake limit brightness value for close-up is BvCLJ, the camera shake limit shutter speed 'l' v H, and the aperture value for close-up AvCU. From the initial setting 1sO sensitivity SvO, I3 v CU =
T v I-1 + A v CU - S v 0, then this camera shake limit brightness value BvCU and sub-subject brightness Bv
Compare with A #453), if BvA is larger than BvCU, control brightness gl
As B v T (#454), set the flash emission timing Tv to the above BvT and the initial setting ISO sensitivity SvO.
From the aperture value AvCU during close-up, T v = B v T' + S v O-A v
CU #455), boost required #456), S
] Return to sequence. If it is smaller than 13 vA or B v CU, the camera shake limit shank speed TvIIC during close-up is set as the flash emission timing Tv<#457), and the process proceeds to #456.

Next, the release sequence in S1 sequence (
#74) will be explained with reference to FIG.

This release is controlled based on the results of the L-L II light/AE performance.

If the lens is not in close-up mode and strobe light is not required (NO in #501 and #502), natural light photography will be used, and the center spot (SP) of the light receiving area and the surrounding area (AV
Using the luminance data of E>(#503), the photometry/AE
Weighting is performed by the circuit 20 based on the command from the CPU 1 shown in FIG. 1. Then, the timer t1 is set to the camera shake limit. Set the time tH, and start dimming (exposure) with the timer start (#505, #506), where T v H.

t F, = 2 After the start of dimming, the shutter opening time shown in Figure 1 is: 1
The reference potential VO for setting appropriate exposure in the control circuit 28 is compared with the control potential V, which changes according to the addition of weighting, and the exposure is terminated when VO≧V. (#5]1).

If the timer tl=o before reaching this ■0≧V (YES in #508), compare the reference potential V1 (>VO) and the control potential ■#509), and if ■ is higher than Vl, (NO in #509), the subject remains dark even after the camera shake limit time has elapsed, and the exposure is still insufficient, so the gain control determination circuit 24 increases the gain by a predetermined amount (#522), and the exposure ends (#511) shall be. Also, if Vl is 7 or higher in #509 above (YES in #509)
, the fog light is ended (#511) without changing the gain; after the exposure is completed, the process proceeds to #75 of the S1 sequence.

On the other hand, if strobe light is required (YES in #502)
), using the luminance data of only the center spot (S P ) of the light receiving part (#512), ΔEvFL, Sv determined above
Add as the end value #513) and use the Bvs- calculated in #416 above #, 51.4) - Check whether it is backlit by looking at the transparent flakes mentioned above (#515), and if it is not backlit ( Reversible flag -0), #516 to #522 below
If it is backlit (transparent flak-1), #523
~#527 is processed to end the exposure (#11).

In any of these processes, timer t1=t
Timer t 2 = t, , (+Set F.

A.

Tv Here, T until flash emission at tA=2
vH is the hand wave timing time, t, I-2 is the limit time, and t is the flash emission time.

Then, natural exposure is started by timer start, and Ll
When the value reaches -0, dimming is started by flash emission.

Regarding the processing after the start of light adjustment, when there is no backlight, timer L1 in the case of shooting with only natural light as described above.
It is the same except that timer t2 is used instead of , and since it is brighter when backlit than when it is not backlit, it is necessary to process whether to increase the gain when timer t2-0 is reached. Exposure is immediately ended (#511).

Also, when the lens is in a close-up state, #5
Perform the processing from 28 to #536 and end the exposure (#511)
shall be. That is, in this process, as in #503 above, the center spot (Sl) of the light receiving section and the 151st side<Av
Using the luminance data of e) and adding the correction of A v CU, r3vs −= (3/4) BvS−1−
(1/4) Bv ＼Add weighting #530), below, #523 to #5 during backlight as described in L
27 is performed. Note that the camera shake limit time during close-up is t = 2-"["vHC.

C In addition, in the above embodiment, weighting is added in the case of close-up and natural light modes, but it is also possible to add weighting in backlighting, or the value thereof may be determined separately.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a still video camera according to an embodiment of the present invention, FIG. 2 is a main flowchart showing the operation of this camera (1", and FIG. 3 is an example of the sequence of switch S1).17 -Chart, Figure 4 shows switch S
FIG. 5 is a flowchart of the self sequence, FIG. 6 is a flowchart of the photometry/AE calculation sequence, and FIG. 7 is a flowchart of the release sequence. ■...CPU, 29...Microphone for recording, 30...
-Audio circuit, 31...CCD, 34...video recording circuit, 35...magnetic head, SO...main switch.

Claims (1)

[Claims] (1) In a still video camera comprising a means for recording images, an audio input means for storing audio in an audio memory, and an audio recording means for magnetically recording the memorized audio on a floppy disk, an audio memory for audio is provided. 1. An audio recording device for a still video camera, comprising means for stopping the operation of the audio input means and prohibiting the operation of the audio recording means when operated during input to the still video camera.