JPH02153684A - Voice recorder for still video camera - Google Patents

Abstract

PURPOSE:To perform photographing in equivalent time both in a self mode and an ordinary mode by performing recording at the time of completing the photographing of an image in the ordinary mode and performing the recording during counting a self timer before the photographing in the self mode reacting according to the selection of a photographic mode. CONSTITUTION:The preset information of a recording switch S3 and a mode change-over switch S4, etc., are inputted before the photographing, and are stored in the memory of a CPU 1, and the CPU 1 executes a prescribed program based on those information, and camera operations such as picture recording and voice recording, etc., are performed. Then the self mode is selected and set by the mode change-over switch S4, the voice recording is performed during counting the self timer before the photographing of the image, meanwhile, sequence is automatically switched by the CPU 1 so as to perform the voice recording after the completion of the photographing when no self mode is selected. In such a way, it is possible to complete the photographing in the equivalent time even both in the photographing by the self timer and ordinary photographing where no self mode is selected.

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 self-timer and a recording function.

[Prior Art] Traditionally, recording in still video cameras has been set to 9.6 seconds each time due to the recording capacity of the magnetic floppy, and the self-timer count time has usually been set to about 10 seconds. There is. Recording is generally performed after the image has been photographed, and therefore it takes a relatively long time to perform one photographing and recording. Furthermore, even during self-timer photography, if recording was performed after photography, it would take nearly 20 seconds from the initial self-timer start.

Therefore, as shown in, for example, Japanese Unexamined Patent Publication No. 61-133780, the first. In some cases, a second timer is provided, and the photograph is taken after the first timer has elapsed, and the recording is made after the second timer has elapsed. A device is known in which the timing of the recording operation can be arbitrarily set manually.

However, although the methods disclosed in these publications allow the timing of both images and audio to be set separately, they do not allow users to set both timings in conjunction with switching between self and normal shooting modes. The settings are time-consuming and cannot be easily operated.

Furthermore, as shown in Japanese Patent Application Laid-open No. 62-945, there is also a device that records while the self-timer is measuring time, but this device does not record for the first predetermined period of time, but instead After that, recording starts, and there is no suggestion as to how to set the timing according to the switching between selfie and normal shooting modes.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems, and automatically adjusts recording timing in response to self mode and normal mode (when self mode is not selected). To provide an audio recording device for a still video camera which can take pictures in the same amount of time in both self mode and normal mode by appropriately switching and without requiring any effort in operation.

[Means for Solving the Problems] The present invention includes means for controlling exposure by opening and closing a shutter to photograph and record images, a means for recording sound, and a self-timer means for opening the shutter after a set time. In a still video camera having a means for selecting a shooting mode between a self-timer mode and a normal mode using the self-timer means, when the self-timer mode is not selected in response to the operation of the selection means, the image is The audio recording device is equipped with a sequence switching means that operates the recording means after photographing is completed, and when a self-timer mode is selected, the recording means is activated during the self-timer count before photographing.

[Function] In the above configuration, in self-mode photography, recording is performed while the self-timer is counting, and in normal photography mode, in which self-mode is not selected, recording is performed after recording ends. The above switching is automatically performed in response to the selection of the photographing mode.

[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. Main battery 4, booster circuit 5 for obtaining power for CCD (described later), backup battery 6, CPU
Regulator 7 for obtaining power for use and general circuits
Consists of etc.

Reference numeral 8 denotes an automatic focus (AP) circuit section, which includes an AP circuit 9 that outputs focus and distance information to the CPU, 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 which inputs the detection signal of VE, an A/D conversion circuit 18 which A/D converts these detection data, and this A/D conversion circuit 18
A serial communication interface 19 receives /D conversion data and performs serial communication with the CPUI, and based on commands from the CPUI input via the interface 19,
In order to obtain appropriate exposure, a weighting circuit 20 weights the detection data as described below, and the signal level is adjusted based on the output of this weighting circuit 2o and a command from the CPUI via the interface 19. It consists of a level shift circuit 21 that shifts the .

Reference numeral 22 denotes a circuit section for controlling the actual closing timing of the CCD shutter based on the output from the AE circuit section 15, which connects a timekeeping capacitor 25 and a circuit section 22 that opens at the timing of opening of the shutter shutter to open the circuit section of the capacitor 25. 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 comparison with O and Vl.

23 is the release signal and C for shooting the COD 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 COD image sensor (hereinafter referred to as COD), 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 COD shutter control circuit 23, c
It operates in response to the ISO sensitivity switching signal from pui, the synchronization signal PG generated in synchronization with the rotation of the floppy disk, etc.

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 a digital information signal (year, month, day, track record, etc.) displayed simultaneously with the image, 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.
A stepping motor driver 39 is a stepping motor for moving the 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 in a predetermined position during recording (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 charging completion monitor signal from the UI, a charging completion signal is output to the CPU when charging is completed. Also, CPUI
The flash is emitted by a light emission trigger signal from.

42 is a reset circuit to prevent abnormal operation when the power supply is low; 43 is an LED that flashes to indicate when the COD shutter is opened in a self-timer mode during shooting; 44 is a floppy disk; If the deck 12 of the insertion tube remains open,
A buzzer that generates a sound to alert the user, 4
Reference numeral 5 denotes a display unit which is operated by the output of the CPU and displays various camera information, setting modes, etc. 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 photographing operation; Recording switch S3 for selecting a recording mode or not.
a switch S4 that switches between single shooting (S, which is the standard mode), continuous shooting (C), which takes multiple photos, and self-timer (SELF), which takes photos using a self-timer; Date information changeover switch S5,
A switch S6 for correcting the date information, a switch S7 for detecting the open/closed state of the deck lid, a switch S8 for detecting the insertion state of the floppy disk, a switch S9 for detecting the presence or absence of a write-protection claw on the floppy disk, and a switch S9 for detecting the open and closed positions of the barrier. Switches 310 and 311 to detect, switch 312 to detect the initial position of the lens, lens changeover switch 313 to set the lens to close-up state during close-up photography, close-up lens person position (close-up shape R) and extended position (standard state) ) for detecting the respective switches 314. It consists of a switch S15 and a switch S16 that detects the initial position of the magnetic head.

Here, the CPUI is equipped with various functional 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 input by the user before shooting, and is stored in the memory in the CPtJl. Based on this memory information, the CPU executes a predetermined 10-gram 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.

FIG. 2 shows the main flowchart. In the same figure, when power is turned on to CPtJl, CPU1 is reset (#1), and the reset flag is set to "1"(#2).
Initialization of flags and RAM, lens and magnetic head 35
Perform the initial setting to set the data to the initial position (#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 a warning is given by flashing a part of the LCD, etc. Next, check to see if there is a battery (#4), and if there is no battery, perform the battery removal routine (#5). If you have batteries, 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 deck lid has just been changed from open to closed (#7
~ #10) If the differential Ir lid is closed immediately, 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 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. When the S1 sequence (shown in Figures 3 and 4) is processed (#13.#14), if switch S1 is OFF or has remained ON from before, the process does not proceed to the S1 sequence and the lens The state of the close-up switch 313 is checked (#15), and if it is turned on, the lens switching routine (#16) is processed.

Next, check the status of mode selector switch 3.4 (#1
7) When this is turned on, the date flag is set to "0",
If it is the date switching correction mode, exit this correction mode (#18) and execute the mode change routine (#19).
). Through this mode change process, as mentioned above, the single, continuous, or selfie shooting mode is memorized.Next, check the status of the recording switch S3 (#20), and if it is turned on, the same shooting mode will be stored. If the date flag is set to "0" and the date switching correction mode is set,
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).
, 0 to process the date switching routine (#27), then:
Look at the date flag (#28), and if it is "l" 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 turned off and the date timer time elapses (
YES at #32), set the date flag to “0” (#3
3) Exit the date switching correction mode. In addition, S1
As will be described later in Siegen, the O of the photometry/distance switch S1
Even if it is N, the date switching correction mode will be 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 (#35L, if it is not completed, start boosting the voltage. #36). Return to step 4. Also, #6 above
and when the main switch SO is OFF, and #3 above.
4. If step-up is not necessary in #35 or charging is complete,
Stop the pressure increase (#37), start the first timer that measures the state of no operation (#38), and monitor the open/closed state of the deck lid until the predetermined time has elapsed (No in #39).
#44), or even if it is open, until a predetermined time by a second timer (described later) has elapsed (#44).
45 (NO), switch So, 81. S3. S4,35
．． Check for changes in the condition of S6, deck lid, etc. (#47
), if there is a change, return to #4 above, if there is no change, go to #3
Return to 9.

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), Further check the condition of the lens (#
42), If it is close-up, change to standard #43) and proceed to #44 above.Also, when the predetermined time set by the second timer has elapsed in #45 above, the user is alerted with a buzzer 44. emits (#46),
As is clear from this flowchart, when the deck lid is open, no input is accepted and only date corrections are possible.

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 time of the second time elapses, issue a warning in the same way as above (#52), and also if the deck lid is closed. When this happens, the warning will stop (#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, and moreover, 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 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. , ONL the spindle motor 37 that moves the floppy disk (#64)
, if it is self-timer, the spindle motor 37 is turned off at this point to save power while the self-timer is counting.
I won't let you N.

Next, distance measurement and photometry/AE? After processing g43 (routine (#65.$66)), check whether boosting is necessary based on the calculation result (#67), and if it is not necessary, wait for release switch S2 to be turned on (#68)
If 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), which will be described later. , after turning on the spindle motor 37 (#71), open the barrier (
#72), operates the lens advance motor 10 to advance the lens to the in-focus position #73), processes a release routine (#74) to be described later, and further processes the video recording circuit 3.
The image is recorded on the floppy disk using a recording device such as No. 4 (#75). In this recording step, date information of year, month, day and track number are also recorded at the same time. Note that when the camera is not in self-mode, recording is done after taking a picture of the same image, so it is not done 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 memory information for mode selection 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 (#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), start the audio memory (#87), and the timer counts down until T=O ( #88), and before reaching that point, check whether the photometry/distance measurement switch S1 has been turned from OFF to ON (#89). Here, in order to indicate the operator's intention to stop recording midway through, the switch S1 is set to be turned on again from 0FFL, so if YES in #89, that is, to stop recording, Set the 83 count described later to "0"#
90), end the audio memory (#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. the above#
If the main switch SO remains ON in step 91, then it is checked 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, recording switch S3
When is pressed once, the 83 count is incremented by 1 (#94) and the process returns to #88. This 83
As the count is incremented, the process returns from #100 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, the track number and the audio compatible track number are set.

Date information such as year, month, and day is not recorded.

Next, the magnetic head 35 is moved to the next empty track (#
98), spindle motor 37 to 0FFL (#99),
33 count is checked (#100), and if it is "0", if the mode is self-shooting or continuous shooting, the process returns to the standard single mode (#102, #103), and then returns to #4 of the main flowchart. Also, if the 83 count is 0 in #100, decrement the 83 count by 1 (
#101), return to #86 above. 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,
Continuous shooting is executed by setting the continuous shooting flag 2 to "1"(#104), returning to #65, and cyclically processing the above routine. Here, no recording was made 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 3i-n, the status of the main switch SO, and the status of the photometry/distance measurement switch S1 (#106 to #108), and check whether each is closed or closed.
ON, if ON, return to #66, open, OFF, OFF
If any of the above applies, move 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 step 68, but if charging is not completed, it is checked whether there is bright backlight (#110). As a result, if there is bright backlight and the release switch S2 is turned on (YES in #111), the process proceeds to #69, but otherwise, the continuous shooting flag 2 indicates whether continuous shooting is in progress. (#112), and if continuous shooting is in progress, the so-called uncharged lock (occurs when it gets dark during continuous shooting)
Then, stop continuous shooting and proceed to #79 above. If continuous shooting is not in progress, turn off the spindle motor 37 to save power during charging.
FF (#113) and start boosting the pressure (#1143.
After that, check whether charging is completed (#115>, if charging is completed, stop boosting the voltage. (#118), #66 above
Return to If NO, return to #4 of main 70-.

Also, if charging is not completed in #115 above, the deck lid,
Look at each status of the main switch SO1 and photometry/distance measurement switch S1 (#119 to #121), and see if they are closed, ON, or
If it is ON, check whether there is bright backlight, and if it is bright backlight, check the status of release switch S2 (#123)
, if this is ON, stop boosting the voltage without waiting for charging completion (#124), and turn on the spindle motor 37 (#125).
) and start shooting < (proceed to #69), or #1 above.
22 is NO, that is, when it is dark or #12
When the release switch S2 is OFF at #3, the above #1
Return to 15. Further, when the deck lid is opened in steps #119 to #121, the main switch SO is OFF, and the photometry/distance measurement switch 31 is OFF, the process exits the S1 sequence and moves to #4 of the main flowchart.

Note that when the self mode is stored in memory and the sequence of the same mode (#70) is processed, recording has already been completed, so the process directly proceeds from #84 to #96.

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

In FIG. 4, in this embodiment, if the continuous shooting mode is #
Proceeding from #78 to #104, after setting continuous shooting flag 2 to "1", recording operation is performed, that is, timer T = 9.6 seconds (
s) #201) and start audio memory #
202), the process returns from #203 to #65 until T=O, and thereafter, this routine is repeated to perform continuous shooting and recording.

When T=O, the audio memory is terminated (#2Q4), the continuous shooting flag 2 is set to "0"(#205), and the barrier is closed (#2Q4).
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 is "1", it is determined that continuous shooting is to be stopped, so the continuous shooting flag 2 is set to "0" in #209>, the spindle motor 37 is set to 0FFL (#210>), and the barrier is closed (#211).
), after returning the lens to standard (#212.#2
13>, 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 #112 with the uncharged lock, the above #20
Similar to steps 9 to #213, processing to stop continuous shooting is performed in steps #214 to #218, and the process moves to #88.

In addition, in this embodiment, additional recording cannot be performed after recording ends after 9.6 seconds have elapsed during continuous shooting, and if continuous shooting ends before 9.6 seconds have elapsed (switch S2 is turned off or the battery is not charged), , it is now possible to record additional audio. Furthermore, the S1 sequence shown in FIGS. 3 and 4 keeps the barrier open during continuous shooting to reduce time lag.

Furthermore, the corresponding video track number of the audio during continuous shooting can be made to correspond to the track number of the first (first stage of continuous shooting),
It can also be made to correspond 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) #301) and 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. #308
The deck lid is opened or the main switch SO is turned off.
When you are FF, please reset the voice mail by self-cancelling, as it is an indication of your intention to stop recording from the beginning #308).
Return to the main flowchart. When the recording continues until the timer counts up (YES in #304), end the audio memory (#309), and select #7 in the S1 sequence.
Move to 1.

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, during self-count, LE
The flashing D was used to indicate the self-count and recording in progress, but the selfie LED was also used to indicate that recording was in progress when recording during normal shooting (for example, single mode). You can.

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

First, photometric elements SP, AVE and photometric circuit 16.17
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, check whether the switch S1 is AP locked without being pressed (#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 set the above-mentioned Abe photometry value Bv2 as the background, that is, sub-subject brightness BvA (#408), and if the AP lock is set in #405, #406. Proceed to #408 without processing #407. Here, the AP lock at #405 is #10 at 81 Sequence in Figures 3 and 4.
This is only the case when moving from #8 to #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 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 unweighted main subject brightness Bvs- is 1/a BvS+7/
8 Use BvA (#412>, while Δ in #411
If BvS is larger than δ, the degree of backlighting is large (backlighting) and a backlight flag is set to "1"#415).
Set BvS to Bvs- (#416).

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

Subsequently, when the above process #412 is performed, Bvs
- Checks whether the brightness is higher than the camera shake limit brightness BvH (#414), and if this is YES, it is judged that the brightness is brighter than the camera shake limit brightness, enters natural light shooting mode ■, and
If o, it is determined that it is dark and the dark flash photography mode ■ is entered. Also, when the process of #416 is performed, check whether the sub-subject brightness BvA minus the backlight detection level δ is equal to or higher than the camera shake limit brightness BvH (#417
), if YES, there is bright backlight, so set the bright/reverse flash to "1"#418), and enter backlight flash photography mode ■; on the other hand, if NO, there is backlight, but the background is dark, so take dark flash photography. Enter 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 control 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 COD (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, the 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
The main subject brightness BvS plus IEv is set as vT (#425). As a result, the main subject will be photographed with only IEv below the appropriate value using only natural light. 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 undershooting from the appropriate level when shooting with only natural light, and calculate the main subject brightness Bv
Obtained from the difference between S and the control brightness value BvT (#427),
Check whether this value ΔEvN is larger than -1Ev (#428), and if it is, set ΔEvN to -IBv.
429), then check whether ΔEvN is less than 13Ev (#430), and if YES, correct ff1K
#431), if No, that is, ΔEv
When N is between -1 and -3, the correction value K is (1/2)ΔE
Set vN+(3/2) (#432).

Next, check whether the main subject distance is 5m or more (#4
33), if it is 5m or more, flash dimming correction value ΔE
Please set vFL to the above correction value as -1-0.5 #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 C0D31.
From the maximum shutter speed TvM, the aperture value AV of the lens, and the above sensitivity value Sv, the maximum controllable brightness BvM at the brightest time is calculated as follows: B v M = T v M - f -A v -S v
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, it means that the time is bright, and the ISO sensitivity Sv is set to 5vO-1.#
439), followed by the maximum controllable brightness Bv at this time.
Close M- and use TvM+Av-3v in the same way (#440
), again the control brightness value BvT is the maximum controllable brightness BvM-
Check whether it is greater than or equal to (#441), and this comparison result is YES.
S, check the bright/reverse flag (#442) if it is present, and if the same flag is set, the main subject brightness BvS and the above maximum brightness value B
Compare with vM- (#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"(#443).
444), transition 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 = BvT + 5v - Av.Furthermore, check 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 1゛v is Check whether the shutter speed is below the touch limit shutter speed TvH (#447>, and if Tv is greater than TvH, leave the Tv obtained in #445 above as is, set a flag indicating that pressure needs to be increased (#448), and move to Sl Sequence. .Furthermore, when the determination in #446 and #447 is YES, Tv is set as TvM (#449) and Tv, respectively.
Set H (#450) and proceed to #448.

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 fliB v T (#451), so that when the main subject is properly exposed, the background is photographed over IEv. After the process of #451, the process moves to #427, 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 at close-up is BvCU, and the camera shake limit shutter speed T.
From v H, aperture value at close-up A v CU, and initial setting ISO sensitivity SvO, BvCU = TvH + Av
CU-3vO, then compare this camera shake limit brightness value BvCU with the sub-subject brightness BvA (#453), and BvA is BvCU.
If it is larger, the sub-subject brightness BvA+0.75 is set as the control brightness value BvT (#454), and the flash emission timing Tv is set based on the above BvT and the initial setting ISO sensitivity SvO.
From the aperture value AvCU during close-up, T v = B v T -t-S v O-A v
CU #455), boosting required #456'),
Return to S1 Siegen. If BvA is smaller than BvCU, the camera shake limit shutter speed TvHC 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 (
4F74> 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), which is calculated using 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), where t = no TvH.

After the start of dimming, the reference potential VO that sets the appropriate exposure in the circuit 28 that controls the shutter opening time shown in FIG. Exposure is terminated when vO≧■. (#511).

If timer t1 = 0 before this ■ reaches 0≧V (YES in #508), compare the reference potential V1 (> VO) and control potential ■ #509), 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 increase the gain by a predetermined amount in the gain control discrimination circuit 24 #5
22), end the exposure (#511), and #5 above.
If VI is equal to or higher than V in 09 (YES in #509), end the exposure without changing the gain (#511).
Note that after the exposure is completed, the process proceeds to #75 of S1 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 it is backlit from the above-mentioned clear flag (#515), and if it is not backlit (clear flag = 0), process #516 to #522 below,
If it is backlit (transparent 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, the limit time, and t is the fludge and L light emission time.

Then, natural exposure is started by timer start, and t1
When the value becomes 0, light control starts by emitting a flash.

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. The exposure ends immediately (4t511).

Also, when the lens is in close-up mode, #5
28 to #536 are performed, and the exposure is completed (#511). In other words, in this process, the brightness data of the center spot (SP) and the periphery (Ave) of the light receiving section are used as in #503 above, and , A v CU correction is added, and a weighting of Bvs-= (3/4)BvS+ (1/4)BvA is added (#530), and the following is the same process as #523 to #527 during backlighting described above. Note that the camera shake limit time during close-up is −TvHC.

is t HC"' 2 In addition, in the above embodiment, weighting was added in the case of close-up and natural light modes, but G
Weighting may be added, or its value may be determined separately.

[Effects of the Invention] As is clear from the above description, according to the present invention, recording in the self-timer shooting mode is performed not after recording is completed but during the self-timer count. Also, when shooting in normal mode without selecting the selfie mode, shooting can be completed in the same amount of time, improving maneuverability. Further, since the timing of recording and recording is automatically and appropriately switched in accordance with the user's selection of the above-mentioned photographing mode, operability can also be improved.

[Brief explanation of the drawing]

FIG. 1 is a block configuration 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, FIG. 3 is a flowchart showing an example of the sequence of switch S1, and FIG. 4 is a flowchart showing another example of the sequence of the switch S1, FIG. 5 is a flowchart of the self sequence, and FIG.
A flowchart of the calculation sequence. FIG. 7 is a flowchart of the release sequence. 1...CPU, 15...AE circuit section, 23...C
OD 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, S4...
Mode changeover switch.

Claims (1)

[Claims] (1) A means for controlling exposure by opening and closing a shutter to take and record images, a means for recording, a self-timer means for opening the shutter after a set time, and a self-mode and normal mode using the self-timer means. The still video camera has a means for selecting one of the shooting modes, and in response to the operation of the selection means, when the selfie mode is not selected, the recording means is activated after image shooting is completed, and the self-recording means is activated. An audio recording device for a still video camera, comprising sequence switching means for operating a recording means during a self-timer count before shooting when a mode is selected.