JPH0264963A - Still video camera - Google Patents

Abstract

PURPOSE:To change only the recording of a sound with maintaining the contents of picture recoding as they are by providing a reset means to be operated during the recording and to reset the contents of the recording and a re- recording control means to start the recording from the beginning when the reset means is operated. CONSTITUTION:A reset means S3 is provided to reset the contents of the recoding by being operated during the recording and a re-recording control means 1 is provided to start the recording from the beginning when the reset means S3 is operated. When the recording is missed during the recording, since the reset means S3 is operated, the recording is re-executed from the beginning as the sound to correspond to the said picture recording. Thus, only the recording can be easily re-executed from the beginning with maintaining the picture recording as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Use] The present invention relates to recording control of a still video camera having a recording function.

[Prior Art] Conventionally, recording with a still video camera has normally been performed at a rate of 9.6 times per recording due to the recording capacity of the magnetic floppy.
It is set to seconds. Regarding the relationship between the exposure operation for image shooting and the audio recording operation, for example, JP-A-61-2
As shown in Japanese Patent No. 53981, a device is known in which the timings of both of these can be arbitrarily set manually.

That is, according to the device disclosed in the same publication, for example, recording for about 10 seconds before or after exposure, or recording for about 3 seconds before exposure is possible.
You can freely select the recording timing, such as recording in seconds or 7 seconds after exposure.

However, the above-mentioned publication does not suggest stopping the recording in the middle or re-recording after that, and the recording and recording are combined, so that the recording operation is stopped immediately. Once the recording starts, even if the recording fails during the recording, if it happens after the recording is finished, the recording must be stopped and the subsequent recordings will be lost, or the recording will have to be continued. In other words, if you want to start recording the audio again from the beginning, you have to start recording again, and it is difficult to leave the recording as it is and start recording again from the beginning.

[Problems to be solved by the invention] The present invention solves the conventional problems as described above.
During recording, when recording fails, the recording will remain as it is,
To provide a still video camera capable of simply recording only from the beginning.

[Means for Solving the Problems] The present invention provides means for photographing and recording images by controlling exposure by opening and closing a shutter, and for a predetermined period of time in connection with this recording.
A still video camera having a means for recording audio, including a reset means for resetting the recorded content when operated during recording, and re-recording for starting recording from the beginning when the reset means is activated. and control means.

[Function] In the above configuration, during recording, if the recording fails, etc., by operating the reset means, it is possible to re-record the audio from the beginning as the audio corresponding to the recording in question.

[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, 1 is a central processing unit (hereinafter referred to as CPU) that controls the entire camera, 2 is a group of various switches that input command information etc. to the CPU (details will be described later), and 3 is a power circuit section. A main battery 4, a booster circuit 5 for obtaining power for the CCD (to be described later), a backup battery 6, and a CPI
It consists of a regulator 7 and the like for obtaining power for J and general circuits.

Reference numeral 8 denotes an autofocus (AF) circuit section, which includes an AF circuit 9 that outputs focus and distance information to CPtJl, 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 includes a spot photometry circuit 1 that receives as input a detection signal of a photometry element SP that measures the subject brightness at the center spot of the photographic screen.
6. Photometric element A that measures the subject brightness in the peripheral area of the shooting screen
A photometric circuit 17 that inputs the detection signal of 'VE, an A/D conversion circuit 18 that converts these detection data into A/D, a serial communication interface 19 that receives this A/D converted data and performs serial communication with the CPU, and A weighting circuit 20 weights the detection data as described below so as to obtain appropriate exposure based on commands from the CPU input via the interface 19; and an output of the weighting circuit 20. and a level shift circuit 21 that shifts the level of a signal based on a command from a CPU via an interface 19.

Reference numeral 22 denotes a circuit section for controlling the actual closing timing of the CCD shutter based on the output from the AB circuit section 15, which connects a timekeeping capacitor 25 and a capacitor 25 which is opened at the shutter open timing. The connection point potential V between the switch 26 that releases the short circuit, the capacitor 25, and the output part of the level shift circuit 21 is referred to as the reference potential V.
It consists of comparators 27 and 28 for comparing with o and vt.

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 a predetermined exposure (exposure fL less than the appropriate exposure by a predetermined one) 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. 6:29 is a microphone for recording, and 30 is an audio circuit that operates in response to a recording control signal from the CPUI. The output is given to a video recording circuit 34, which will be described later.

31 is a CCD image sensor (hereinafter referred to as 00), which is a solid-state imaging device that converts optical information into electrical signals.
, 32 is a driver that moves the CCD 31. This CC
The D driver 32 operates in response to the output of the CCD shutter control circuit 23, a 130 sensitivity switching signal from the CPU, a synchronization signal PG generated in synchronization with the rotation of the 70-sopy, and the like.

34 is a video recording circuit for magnetically recording images and audio onto a floppy disk, and 35 is a magnetic head thereof. It operates in response to the data information signal (year, month, day, track information) displayed simultaneously with the image, gain control output, and synchronization signal PG.

36 is a spindle motor driver driver servo for driving the floppy disk at a constant speed according to commands from the CPU;
37 is the spindle motor, 638 is from the CPUI,
In response to the command, three stepping motor drivers are used to move the magnetic head 35, and the stepping motor 39 controls the movement of the magnetic head 35 to a predetermined track position on the floppy disk. Reference numeral 40 denotes a head holding plunger for setting the head in a predetermined position during 91 (writing).

41 is a flash that fires when the exposure amount is insufficient during shooting, and it has a built-in charging circuit and booster circuit for flashing.
The boost operation is started by the boost signal from the CPUI, and the CP
Based on the charge completion monitor signal from U1, a charge completion signal is output to CPLJI when charging is completed. Also, CPU
A flash is emitted by a light emission trigger 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.
44 is a buzzer that generates a sound to alert the user when the floppy inserter's deck lid is left open.
45 is activated by the output of the CPUI and displays various camera information,
This is a display section for displaying setting modes and the like on an LCD or the like.

The components of the switch group 2 include the main switch SO1 and the switch S for performing photometry and distance measurement prior to photographing.
1. Release switch S2 when performing a shooting operation, recording switch S3 with the function of selecting the mode of recording or not, and resetting the recording content after transitioning to the S1 sequence described later. Single shooting (S
, this is the standard mode), continuous shooting (C), which takes multiple shots in succession, and self-timer shooting (S), which takes pictures using the self-timer.
ELF) switch S4 for changing each mode, date information changeover switch S5, date information modification switch S
6. Switch S7 for detecting the open/closed state of the deck lid, switch S8 for detecting the insertion state of the floppy disk, switch S9 for detecting the presence or absence of the floppy write-inhibiting claw, and a switch for detecting the open and closed positions of the barrier. 310
．． S11, switch S12 that detects the initial position of the lens
, a lens changeover switch 313 for setting the lens in a close-up state during close-up photography, switches 314 and 315 for detecting the close-up lens position (close-up state) and up position (standard state), respectively, and detecting the initial position of the magnetic head. It consists of a switch 816.

Here, the CPUI is equipped with various ma configurations such as a self-timer means and a sequence control means to be described later, and the settings and information of the recording switch S3, mode changeover switch 84, etc. are input by the user before shooting, and are stored in the CPUI. The information is stored in the memory, and based on the memory information, the CPU executes predetermined program operations, and camera operations such as video recording and audio recording are performed.

In addition, when self-mode is selected and set with the mode selector switch S4, recording is performed during the self-timer count before taking an image; on the other hand, when self-timer mode is not selected,
The sequence is automatically switched using the CPUI so that recording is performed after the shooting is completed.

Hereinafter, the operation of this camera will be explained according to the flowcharts shown in FIGS. 2 to 6.

FIG. 2 shows the main flowchart. In the figure, when the power is turned on to the CPU 1, the CPU 1 is reset (#1), the reset flag is set to "1"(#2), the flag and RAM are initialized, and the lens and magnetic head 35 are set to their initial positions. Perform the initial settings (#3).
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. Warn by blinking 4 Next, check if there is a battery ($4), and if there is no battery, perform the battery removal routine #5). If there is a battery, check the status of the main switch SO. 6).

If the switch SO is currently ON, check whether the deck lid is open or closed, whether there is a floppy disk, whether there is a recording prohibition claw, and whether the third base has just been closed from the plate (
#7 to #10), immediately after the deck lid is closed, the initial load routine locates the beginning of an unrecorded track on the floppy disk, and the magnetic head 35 moves to that position (#11).

After that, if the judgment in #10 is NO, check the status of the photometry/distance measurement switch S1 (#12), and if it has changed from OFF to ON, perform photometry/distance measurement, exposure, and subsequent various steps. The S1 sequences (shown in FIGS. 3 and 4) are 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, this correction mode is exited (#18), and the mode change routine (#19)
process. Through this mode change process, as mentioned above, the single, continuous, or selfie shooting mode is memorized.6 Next, check the state of the recording switch S3 (#20), and if it is turned on, the same shooting mode will be stored. Then, the date flag is set to 0, and if the date switching correction mode is selected, the correction mode is exited (#21), and a recording switching routine (#22) for recording or not is processed.

The close-up switch S13, mode changeover switch S4, recording switch 83, etc. all change to a different state each time they are pressed (turned on), and return 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,
Check the date flag (#28), and if it is "1" and the date correction switch S6 is turned on, start the date timer anew (#29° #30), and execute the date correction routine (#31). ). When the date correction switch 36 is OFF and the date timer time has elapsed (YES in #32), the date flag is set to "0"(#
33) Exit from the date switching 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 charging circuit of the flash 41 needs to be boosted (#34), and if boosting is necessary, check whether charging is complete (#35), and if not, start boosting the voltage (#36). Return to step #4 above. Also, # above
When the main switch SO is OFF in step 6 and # above
34. If boosting is not necessary in #35 or if charging is complete, stop boosting the voltage (#37), and use the first
Start the timer (#38), and until the predetermined time has elapsed (NO in #39), check the open/closed state of the deck lid (#44), and check whether it is closed or open, which will be described later. Until the predetermined time set by the second timer has elapsed (
#45: No), switches So, SL, S3. S4,3
5. Check whether there are any changes in the condition of the 36 or the deck lid (#4
7) If there is a change, return to #4 above; if there is no change, go to #4.
Return to 39.

Also, when the predetermined time set by the first timer has elapsed in #39 above, check the setting mode (#40), and if it is self-shooting or continuous shooting mode, change to the standard single mode (#41). Furthermore, check the condition of the lens (
#42), if it is close-up, change to standard #43), then proceed to #44 above. Furthermore, if the predetermined time set by the second timer does not elapse in #45 above, a warning is issued to the user by sounding the buzzer 44 (#46).
. As is clear from this flowchart, when the deck lid is open, no input is accepted and only the date can be corrected.

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 nail in #9 (i.e. recording is prohibited), stop boosting 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 lid is closed, 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.

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 switch S1 to exit the date changeover correction mode) (#62), check whether the self mode is stored in memory (#63), and if it is not self mode, immediately switch to recording standby. , turn on the spindle motor 37 that drives the floppy disk #64)
, if the self-timer is counting, the spindle motor 37 is turned on at this point to save power while the self-timer is counting.
I won't let you.

Next, distance measurement and photometry/AE calculation routine (described later) are performed.
#65. After processing #66), it is checked from the calculation result whether or not boosting is necessary (#67), and if it is not necessary, it waits for the release switch S2 to be turned on (#68). When the switch 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) described later if it is the self mode, and the spindle motor 37
ONL (#71), then open the barrier (#72)
), operates the lens advance motor 10 to advance the lens to the in-focus position #73), processes the release routine (#74) described later, and then records the image onto a floppy disk using a recording device such as the video recording circuit 3.4. Perform recording (#
75). In this recording step, date information of year, month, day and track number are also recorded at the same time. Note that when not in self-mode, recording is performed after the image is taken, so
I haven't done it yet at this point.

After that, the magnetic head 35 is sent to the next empty track (
#76), reset the lens #77), check whether the mode selection memory information is continuous shooting mode (#78),
If it is not continuous shooting mode, reset the quick shooting flag 2 (continuous shooting flag = 0) L (#79), set the spindle motor 37 to 0FFL (#80) to end image recording, close the barrier (#81), and close the lens. Return to standard.

(#82.#83).

Furthermore, the memory information according to the setting of the recording switch S3 is checked (#85), and if the recording mode is selected, the recording operation is started. Set the recordable timer time 1 of the audio memory to 9.6 seconds (s) #86) and start the audio memory (
#87). And the timer counts down,
Check whether T=O (#88), and check whether the photometry/distance measurement switch S1 has been turned from OFF to ON before reaching that point (#89). Here, in order to indicate the operator's intention to stop recording midway through, switch S1 must be turned OFF and then ON again, so select YES in #8.
, that is, in the case of stopping the recording, the voice memory operation is ended (#95).

If NO in #89 above, check the state of the main switch SO (#91), and if it turns OFF, reset the audio memory as an indication of your intention to stop the current recording from the beginning (#92), and start the audio recording process. The process moves to #4 in the main flowchart of FIG. 2 described above. #91 above
If the main switch SO remains ON, then check whether the recording switch S3 has changed from OFF to ON (#
93).

Turning on the recording switch S3 at this stage instructs to erase the recorded contents up to that point and start recording again from the beginning. That is, if YES in #93, the 11 audio memory is reset (#94), the timer time T is set again (#86), and re-recording is performed. In this way, when recording fails during recording or when you want to start recording again, you can change only the recorded content without changing the recorded content.

When the timer reaches T=O in #88 above, the audio memory is terminated (#95) and the spindle motor 37 is turned on (#95).
96), the audio is recorded (#97). Here, the track number and the audio compatible track number are recorded, but date information such as the year, month, and day is not recorded. Next, the magnetic head 35
to the next empty track (#98), turn the spindle motor 37 to 0FFL (#99>, then return to the standard single mode if the mode is self-shooting or continuous shooting, and then return to the standard single mode (
#102. #103), #48 of the main flowchart, return.

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

Also, if continuous shooting mode is set in #78 above,
Continuous shooting is executed by setting the continuous shooting flag 2 to "1"(#104), returning to #65, and cyclically processing the above routine. Here, there is no recording during continuous shooting.

In addition, in #68 above, if the release switch S2 remains OFF or becomes OFF, check the continuous shooting flag 2,
If continuous shooting is not in progress, check the open/close status of the deck lid, the status of the main switch SO, and the status of the photometry/distance switch S1 (#106 to #LO8), and check whether they are closed, ON, or closed.
If it is ON, the process returns to #66, and if it is open, OFF, or OFF, the process moves to #4 of the main flowchart.

On the other hand, if the continuous shooting flag 2 is "1" in #105, the continuous shooting operation is canceled and the process moves to #79.

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 #
The process proceeds to 68, but if charging is not completed, it is checked whether there is bright backlight (#110). As a result, is there bright backlight? If the release switch 82 is turned ON (YES in #111), the process proceeds to #69, but otherwise the process goes to check the continuous shooting flag 2 indicating whether continuous shooting is in progress (#112). ), if continuous shooting is in progress, a so-called uncharged lock occurs (which occurs when it becomes dark during continuous shooting), stopping continuous shooting and proceeding to #79 above. If continuous shooting is not in progress, turn off the spindle motor 37 to save power while charging.
F (#113) and start boosting the pressure (#114). After that, check whether charging is completed (#115), and if charging is completed, stop boosting the voltage. (#118), returning to #66 above. If No, return to #4 of the main flow.

Also, if charging is not completed in #115 above, Blur 1r
Check the status of the lid, main switch SO1 and metering/distance switch S1 (#119 to #121), and check whether they are closed or O.
If it is N or ON, check whether there is bright backlight, and if it is bright backlight, check the status of release switch S2 (#12
3) If this is ON, stop boosting the voltage without waiting for charging completion #124), and turn on the spindle motor 37 (#1
25) Then go to shoot (proceed to #69). Also, if the judgment in #122 above is No, that is, when it is dark, or #
If the release switch S2 is OFF in step 123, the process returns to #115. Further, when the deck lid is opened in steps #119 to #121, the main switch SO is OFF, and the photometry/distance measurement switch S1 is OFF, the process exits the S1 sequence and moves to #4 of the main flowchart.

Therefore, set the continuous shooting flag 2 to "0"#209>, and set the spindle motor 37 to 0FFL (#210), where:
With the 81 sequence shown in Figure 3, the barrier is kept open during continuous shooting to reduce time lag. Furthermore, the corresponding video track number for 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 fourth step.
This will be explained with the help of figures.

Set tie 7T to 9.6 seconds (s) #301) and start self-counting #303). During timer counting, set LE to indicate that self-counting is in progress.
Blink D (#305), and during self-count, #306. When the deck lid is opened or the main switch SO is turned off in #308, this is regarded as an expression of intention to release the self, and the process returns to the main flowchart. When the self-count is finished, #71 of S1
Move to.

In addition, during self-counting, the LED flashes to indicate the self-count, but when recording during normal shooting (for example, single mode), this self-service LED is also used to indicate that recording is in progress. You may also do so.

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

16.17 Photometric elements SP, AVE and photometric circuit
Perform photometry (#401) and convert the photometry analog data to A
The data is A/D converted by the /D conversion circuit 18 and taken into the CPUI (#402 to #404).

Next, it is checked whether the switch S1 is not pressed and the AP block is reached (#405), and if No, the brightness photometric value Bv of the center (spot) is determined from the brightness photometric value Bv2 of the surrounding (above).
1 to find the brightness difference ΔBv (#406), and subtract a predetermined correction value α according to ΔBv from the photometric value Bv1 of the spot to find the main subject brightness BvS (#4
07), and the above-mentioned Abe photometric value Bv2 is set as the background, that is, the sub-subject brightness BvA (#408). Also, if #405 is AP Flock, #406. Proceed to #408 without processing #407. Here, the AP block in #405 is from #108 to # in the S1 sequence in Figure 3.
This is only the case when proceeding to step 66 and performing photometry/AE calculations.

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 obtained above, that is, the degree of backlighting ΔBvS (#410). Compare this value with the backlight detection label δ (#411). If ΔBvS is smaller than δ, the degree of backlighting is small (frontlighting), and the weighted main subject brightness Bvs- is 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 large (backlighting), and a backlight flag is set as "1"#4
15), BvS is set to "Bvs" (8416).

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

Subsequently, when the above process #412 is performed, Bvs
” is equal to or higher than the camera shake limit brightness BvH (#414), and if it is YES, it is judged that the brightness is brighter than the camera shake limit brightness, enters natural light shooting mode, and NO
If so, the camera determines that it is dark and enters dark flash photography mode ■. Also, when the process of #416 is performed, check whether the sub-subject brightness BvA minus the backlight detection level δ is greater than or equal to the camera shake limit brightness BvH (#417).
If YES, the bright backlight is set, so the bright backlight flag is set (backlight flag = 1) (#418), and the backlight flash photography mode is entered.Meanwhile, N.

If so, it is backlit, but the background is dark, so enter dark flash photography mode ■.

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 value Sv.
419), the maximum brightness BvM that can be controlled for proper exposure when the subject brightness is extremely bright, and the maximum shutter speed T
From vM, the value Av corresponding to the aperture of the lens, and the value Sv corresponding to the sensitivity of the CCD (both are apex values), BvM
=TvM+-Av-3v (#420).

Next, the Bvs- obtained in #412 above and the BvM above
Compare the magnitudes of (#421), and if Bvs is greater than BvM, it is too bright, so use 5vO-1 as the sensitivity value Sv (#422), and if BvS- is greater than BvM, perform the process in #422 above. without the need for boosting (
#423), the process moves to the S1 sequence. .

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

In this mode, compare the main subject brightness BvS plus IEv and the camera shake limit brightness BvH (#424).
If BvS+1 is not smaller than BvH, the control brightness value B
As vT, a value obtained by adding IEv to the main subject brightness BvS is set (#425). As a result, the main subject will be photographed under natural light by lEv from the appropriate value. On the other hand, if BvS+1 is smaller than BvH, the main subject is dark, so the camera shake limit brightness BvH is set as the control brightness value BvT (#426).

Furthermore, in order to calculate the correction value for flash dimming, we calculate the value ΔEvN, which indicates how much the main subject will be under from the appropriate level when shooting with only natural light, and calculate the main subject brightness B.
Determined from the difference between v, S and the above control brightness value BvT (#42
7) Check whether this value ΔEvN is greater than IEv (#428), and if so, set ΔEvN to -IEv #429), then check whether ΔEvN is less than -3EV (#430) , if YES, the correction value K is set to 0 (#431); if NO, that is, ΔE
When vN is between -1 and -3, the correction value K is set to (1/2)Δ
Set EvN+(3/2) (#432).

Next, check whether the main subject # is 5 meters or more (#
433), if it is 5m or more, the flash dimming correction value Δ
Please set EvFL to the above correction value +0.5 #434)
, if it is less than 5 m, the tuning light correction value ΔBVFL is set 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 was calculated from the maximum shutter speed TvM, the lens aperture value AV, and the sensitivity value Sv above, as follows: BvM=TvM+Av-3v After that (#437), it is checked whether the control brightness value BvT is equal to or higher than the maximum controllable brightness BvM determined above (#438). If the comparison result is YES, the brightness is high, and the ISO sensitivity Sv is set to 5vO-1 (#439), followed by the maximum controllable brightness B at this time.
Similarly, TvM+Av-3v was used as vM- (#44
0), the control brightness value BvT is the maximum controllable brightness Bv
, M- or above (#441), and if the comparison result is YES, check the bright/reverse flag (#442), and if the flag is set, the main subject brightness BvS and the maximum brightness fI B v M - Compare #443), if BvS is larger than BvM-, the brightness of the main subject is bright even in backlight and no flash is necessary, so set the bright/reverse flag to "0".
” (#444) and shifts to natural light photography mode ■.

Above #438. Comparison result of #441 and #443 is N
O, and when the bright/reverse flag in #442 is 0, go to #445 and control the flash emission timing Tv by setting the brightness value BvT, ISO sensitivity value Sv, and lens aperture value A.
From v, set Tv=Bv'T''+5v-Av.Furthermore, it is checked whether the above flash emission timing Tv is greater than or equal to the maximum shutter speed TvM (#446), and if Tv is smaller than TvM, the same timing Tv is Check whether the shutter speed is below the touch limit shutter speed TvH (#447), and if TV is greater than TvH, set a flag indicating that the pressure needs to be increased while leaving the 1゛V obtained in #445 above (#448), and proceed to the 31 sequence. In addition, when the determination in #446 and #447 is YES, Tv is set to TvM (#449) and Tv, respectively.
Set VH (#450) and proceed to #448.

Next, 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 processing #451, the above #
427, and similar processing 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 at close-up is BvCU, and the camera shake limit shutter speed T
-vH, aperture value AvCU during close-up, and initial setting ISO sensitivity SvO, BvCU=TvH+AvCU-
3vO, then compare this camera shake limit brightness value BvCU and the sub-subject brightness BvA (#453), and BvA is BvCU.
If it is larger, the sub-subject brightness BvA-1-0,75 is set as the control brightness value BvT (#454), and the flash emission timing Tv is set according to the above BvT and the initial setting ISO sensitivity S.
From vO and the aperture value AvCU during close-up, TV=BvTl-8vO-AvCU (#455), boosting is required #456), and return to S1 sequence. If BvA is smaller than BvcU, the camera shake limit shutter speed TvHC during close-up is set as the flash emission timing Tv (#4
57), proceed to #456 above.

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

This release is controlled based on the photometry/AE calculation results.

If the lens is not in close-up mode and strobe light is not required (NO in #501 or #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 based on Bvs- determined in #412 of the calculation sequence is added (#504). This is C shown in Figure 1.
Weighting is performed by the circuit 20 based on a command from the PU1. Then, the timer t1 is set to the camera shake limit time tH, and when the timer starts, light control (exposure) is started (
#505. #506). Here, -TvH.

I (=2) After the start of dimming, the reference standard potential VO is used to set the appropriate exposure in the shutter open time control cycle 1128 shown in FIG. Compare V and end the exposure when VO≧■ (#511).

If the timer t1 = 0 before reaching this ■0≧■ (YES in 8508), compare the reference potential v1 (>VO) and the control potential -V #509), and if ■ is higher than ■1 (NO in #509), even after the camera shake limit time has elapsed, the subject is dark and the exposure is still insufficient, so the gain control discrimination circuit 24 should increase the gain by a predetermined amount.#
522), and the exposure is completed (#511). Also, if vl is 7 or more in #509 above (YES in #509)
, the exposure ends (#511) without changing the gain. Note that after the exposure is completed, the process proceeds to #75 of the Sl sequence.

On the other hand, if strobe light is required (YES in #502)
), use the brightness data of only the center spot (SP) of the light receiving part (#512), add ΔEvFL and Sv calculated above as correction values. #513), and use Bvs- calculated in above #416. 514), check whether there is backlighting from the bright/reverse flag mentioned above (#515>, if it is not backlit (bright/reverse] lag - ○), process #516 to #522 below,
If it is backlit (backlit flag = 1), #523 to #527
is processed and the exposure is completed (#511).

In any of these processes, timer t1-t
Set timer t2=tH+t.

A' Tv Here, -T until flash emission at tA=2
vH is the hand wave timing time, tH=2 is the limit time, and tF is the flash emission time.

Then, natural exposure is started by timer start, and tl
=o, light control is started by flash emission.

Regarding the processing after the start of light adjustment, when there is no backlight, the timer t1 in the case of shooting with only natural light as described above is used.
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. Exposure is immediately terminated (#511).

Also, when the lens is in close-up mode, #5
28 to #536 are performed, and the exposure is completed (#511). That is, in this process, similarly to #503 above, the brightness data of the center spot (SP) and the periphery (Ave) of the light receiving section are used, and the A v CU L:y) correction is added to 1, and Bvs = ( 3/4)BvS±(1/4)B
vA weighting is added (#530), and the same processing as in #523 to #527 during backlighting is performed. Note that the camera shake limit time during close-up is t =
= 2 T V HC toll.

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

[Effects of the Invention] As is clear from the description of the embodiments above, according to the present invention, by operating the reset means during recording, the previously recorded content is erased and audio recording is started again from the beginning. Therefore, with a simple operation, it is possible to change only the audio recording while leaving the recorded content unchanged.

[Brief Description of the Drawings] 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 the camera, and Fig. 3 is an example of the sequence of switch S1. 4 is a flowchart of the self sequence, FIG. 5 is a flowchart of the photometry/AE calculation sequence, and FIG. 6 is a flowchart of the release sequence. 1...CPU (re-recording control means), 23...CO
D shutter control circuit, 29...Microphone, 30...Audio circuit, 31...CCD, 32...CCD driver, 34...Video recording circuit, 35...Magnetic head, Sl... Photometry/distance measurement switch, S2...release switch, S3...recording switch (reset means).

Claims (1)

[Claims] (1) A still video camera that has means for controlling exposure by opening and closing a shutter to photograph and record images, and means for recording audio for a predetermined period of time in connection with this recording, and that is operated during recording. 1. A still video camera comprising: a reset means for resetting recorded content by activating the reset means; and a re-recording control means for starting recording from the beginning when the reset means is activated.