JPH0244873A - Sound recorder for still video camera - Google Patents

Abstract

PURPOSE:To prevent the sound input of the noise or a driving means by suspending a recording circuit and the driving means during a period from the start of the sound input to a sound memory till it is finished. CONSTITUTION:Sequence is switched automatically by a CPU 1 so that sound recording is performed during self timer counting before the photographing of a picture when a self mode is selected and set by a mode selector switch S4, and on the other hand, the sound recording is performed after the finish of the photographing when the self mode is not selected. Namely, the driving means to drive a floppy disk is suspended during the input of a sound to the sound memory. Thus, the noise of the same driving means is never picked up in the sound input, and besides, wasteful current consumption can be eliminated.

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.

[Prior Art] Conventionally, proposals have been made for still video cameras that can not only record video but also audio recording.
Normally, a magnetic floppy disk is driven to rotate in conjunction with pressing down on the release button.

However, in such a sequence operation, the spindle motor is driven even during recording, so if you input audio using the microphone attached to the camera, the microphone will also pick up the motor sound. In addition, recording is performed for approximately 10 seconds per image capture (one image), but audio input is first recorded in the audio memory and then recorded from the same memory to the floppy disk. Rotating the spindle motor while inputting audio to the memory also results in wasted current consumption.

Incidentally, in order to be able to start audio input at any timing, it is known that a start button that starts audio input is provided separately from a release button that starts shooting (for example, Japanese Patent Application Laid-Open No. 61156979 (see publication),
According to this device, it is not possible to input the sound into the memory before photographing, or to operate the photographing and the sound input simultaneously and sequentially in relation to each other.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems, and is a still video camera that performs recording and recording in conjunction with each other. An object of the present invention is to provide an audio recording device for a still video camera which can stop the current consumption and prevent noise from a driving means from being input as audio.

[Means for Solving the Problems] The present invention provides a methyl video camera having means for recording images and sounds in a linked relationship, including an audio memory for temporarily storing input audio, and a floppy disk for storing the contents of the audio memory. An audio device comprising a recording circuit for recording on a disk and a driving means for driving the floppy disk, the recording circuit and the driving means being stopped at least from the start to the end of audio input to the audio memory. It is a recording device.

[Function] According to the above configuration, when recording audio corresponding to one image, the driving means such as the spindle motor is stopped while the audio is being input to the memory, so the microphone does not absorb noise from the driving means. I can't pick it up anymore.

[Effects of the Invention] According to the present invention, since the driving means for driving the floppy disk is stopped while audio is being input to the audio memory, noise from the driving means is not picked up in the audio input. , it is possible to eliminate unnecessary current consumption.

[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 autofocus (AP) circuit section, which includes an AF circuit 9 that outputs focus and distance information to the CPUI, a lens extension motor 0, a lens stop magnet 11, and a lens position detection encoder 12. ] 3 is a lens switching/barrier opening/closing circuit, and 14 is its motor. For example, when the motor 4 rotates in the forward direction, the lens is sequentially switched between standard and close-up, and when the motor 4 rotates in the forward direction, it is located in front of the lens, and is located in front of the optical path shielding plate. A functional barrier is opened and closed.

Reference numeral 15 denotes an automatic exposure (AE) circuit section, which receives a detection signal from a photometric element SP that measures the subject brightness at the center spot of the photographic screen. A photometric circuit 17 that receives as input the detection signal of the photometric element AVE that measures the brightness of a peripheral object, an A/D conversion circuit 18 that converts these detection data into A/D, and receives this A/D converted data and communicates serially with the CPU. One serial communication interface that performs the above-mentioned detection data, and a weighting system that weights the above-mentioned detection data as described later so that appropriate exposure can be obtained based on commands from the CPU input through one serial communication interface. It consists of a circuit 20, a level shift circuit R21 that shifts the level of a signal based on the output of the weight receiving circuit 20, and a command from the CPU without intervening the 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 AE circuit section 15, which connects a capacitor 25 for timekeeping and a capacitor 25 which is opened at the timing when the shutter is opened. The connection point potential ■ between the switch 26 that releases the short circuit, the capacitor 25, and the output part of the level shift circuit 1i21 is used as a reference reference voltage.
It consists of comparators 27 and 28 for comparing the positions VO and Vl.

23 is a release signal for capturing the CCD shutter and C
Open based on the pulse signal from the CD driver 32,
This is a control circuit that controls the shutter to close when a predetermined exposure is obtained based on the output of the comparator 28 of the circuit section 22 or a forced close signal from the CPUI, and sends the shutter opening/closing signal to the CPUI and CCD driver 32. Output.

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 COD), which is a solid-state imaging device that converts optical image information into electrical signals;
2 is a driver that drives the CCD 31, and this CCD driver 32 receives the output of the CCD shutter control circuit 23, C
It operates in response to the ISO sensitivity switching signal from PU1, 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. Ditto information signal (year, month, day, 1~Rack No., etc.) displayed simultaneously with the image, gain control output, synchronization signal P
It operates in response to G.

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 amount of exposure during shooting is insufficient, 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 the UI, a charge completion signal is output to the CPU 1 when charging is completed. Also, cpui
The flash is emitted by a light emission trigger signal from.

42 is a glue set circuit to prevent abnormal operation when the power supply is low; 43 is an LED that flashes to indicate when the CCD shutter is opened in a self-timer mode during photographing; and 44 is a floppy disk. If the insertion tube lid is left 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 SO3 and the diagonal switch S that performs photometry and distance measurement prior to shooting.
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; Information changeover switch S5 to day 1
, Day 1 - Information correction switch S6, 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 write-protection claw on the floppy disk, the open position of the barrier and Switches SIO and Sll that detect the closed position, switch S12 that detects the initial position of the lens, and lens changeover switch 313 that puts the lens in a close-up state during close-up photography.
, close-up lens (close-up condition)
and a switch S14 that detects the exit position (stunt start state). It consists of Si5 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 the 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 within the CPUI. Based on this memory information, the CPU executes predetermined program operations, and camera operations such as video recording and audio 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 flowcharts 1 to 1 shown in FIGS. 2 to 7.

FIG. 2 shows the main flowchart. In the figure, when the power is turned on to the CPUI, 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). In addition,
If this reset flag remains at "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 flashing 6 Next, check to see 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 is currently SO or ON, tell us 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 changed from open to closed.
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, when the judgment in #10 becomes No, the next step is to check the status of the photometry/distance measurement switch S1 (#12), and since it has changed from OFF to ON, it means photometry/distance measurement, exposure, and the various subsequent 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 from before, the process does not proceed to the 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
), if this is turned ON, the date flag is set to 0, and if it is the date switching correction mode, it is removed from this correction mode (#18), and the mode change routine (#19)
process. Through this mode change process, as described above, one of the shooting modes of single, continuous shooting, and selfie is stored in memory. Next, check the state of the recording switch S3 (#20), and if it is turned on, the date flag is similarly set to rQJ, and if it is in the date switching correction mode, it is removed from this correction mode (#21 ), the recording switching routine (#22>) is processed.

The close-up switch 313, the mode changeover switch S4, the recording switch 83, etc. all change to a different state each time they are pressed (turned on), and return to the original state when they are pressed as many times as they exist.

After that, check the status of the date selector switch S5 (123
), when this is turned ON, the date flag is set to 11" and the date switching correction mode is entered (#24), and the reset flag is set to "0" to enable recording of data 1~ information. As time passes, a date timer is started to exit this switching correction mode (#26
)--process the date switching routine (#27). Next, the date flag is checked (#28), and if it is "1" and the date correction switch S6 is turned on, the date timer is newly started (#29 and #30), and the date correction routine ( Process #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 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 (#35), and if not, start boosting the voltage (#36). Return to step #4 above. Also, # above
6 when the main switch is SO or OFF, and the above #
34. If boosting is not necessary in #35 or if charging is complete, stop boosting the voltage (#37), and the first
Start the timer (#38), and until the predetermined time elapses (NO at #3), check the open/closed status of the deck lid (#44) and check whether it is closed or open. Until the predetermined time by the second timer described below has elapsed (
#45: NO), switch So, SL, S3, 34, 3
5. Check for changes in the condition of S6, deck lid, etc. (#4
7) If there is a change, return to #4 above, if there is no change, go to #
Return to 39.

Also, if the predetermined time set by the first timer does not elapse in step #3 above, change the setting mode to mode (#40), and change the self or continuous shooting mode to the standard single mode. 41) and further check the condition of the lens (#
42), when it is close-up, change to stunt start #43), then proceed to #44 above. Further, if the predetermined time set by the second timer does not elapse in #45 above, a warning is issued to the user using 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 disk in #9 or there is no claw (i.e. recording is prohibited), stop boosting the voltage 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; however, when the self-mode is selected, recording is performed during the self-timer.

In Fig. 3, first stop the voltage boost to prohibit charging during recording/recording (#61), set the date flag to "0", and exit from the date switching correction mode by turning on the switch S1) ( #62), checks whether the self mode is stored in memory (#63), and if it is not self, turns ON the spindle motor 37 that drives the floppy to immediately set it to recording standby (#64);
If it is self-timer, the spindle motor 37 is not turned on at this point to save power while the self-timer is counting.6 Next, after processing distance measurement and photometry/AE calculation routines (#65 and #66) to be described later. 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).
). 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), which will be described later. After turning on the spindle motor 37 (#71), open the barrier (#72), operate the lens advance motor 10 to advance the lens to the in-focus position, and process the release routine (#74) described later. Furthermore, 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 performed after taking an image, so it has not been performed yet 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 do not 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, it will start recording. 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 T=O (#88), and before reaching that point, checks whether the photometry/distance measurement switch S1 has been turned from OFF to ON (#89). Here, in order for the operator to indicate his/her intention to stop recording midway through, the switch S1 is set to 0FFL and turned ON again, so if YES in #89, that is, to stop recording, Set the 83 count described later to "0"#
90), end one voice memo (#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 process the audio recording. The process moves to #4 in the main flowchart of FIG. 2 described above without doing anything. #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 the intention to not perform additional recording for one photographed image is expressed by pressing the recording switch S3. That is, recording switch S3
When is pressed once, the 83 count is incremented (#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 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>, spindle motor 37 to 0FFL (#99),
Check the 83 count (#100), and if it is "0", return to standard single if mode, selfie or continuous shooting (#1゜2, #103), then return 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. In this way, additional recordings are made.

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,
Set continuous shooting flag 2 to “1” and return to #104) #65.
Continuous shooting is executed by cyclically processing the above routine. Here, there is no recording during continuous shooting.

Also, 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 opening/closing status of the camera cover, the status of the main switch So, and the status of the metering/distance switch S1 (#106 to #108), and check whether each is closed, ON, or
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 is 2 or "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 #
If the charging is not completed, proceed to 68, check whether there is bright backlight (#110). As a result, if there is bright backlight and the release switch S2 is turned on (YES in #11), the process proceeds to #69 above, but otherwise the continuous shooting flag indicates whether continuous shooting is in progress. 2 (#11゜2), and here it is during continuous shooting that is what is called an uncharged lock (this happens when it gets dark during continuous shooting)
Then, continuous shooting is stopped and the process proceeds to #79 above. If continuous shooting is not in progress, turn off the spindle motor 37 to save power while charging.
FF is turned on (#113), and boosting is started (#114).

After that, check to see if charging is complete (#1.15), and if charging is complete, stop boosting the voltage (#116). Check again to see if there is bright backlight (#1.1.7). Turn on the motor 37 (#118) and
Return to 66. If No, return to #4 of the main flow.

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 it is ON, stop boosting the voltage while waiting for charging to complete. #124), then turn on the spindle motor 37 (#125).
) and start shooting < (Proceed to #69). Also, #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 open 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.

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 is recorded after continuous shooting (
However, as will be described later, an embodiment in which recording is performed during self-timer counting, and an embodiment in which recording is performed during continuous shooting will be described below with reference to FIG.

In FIG. 4, in this embodiment, 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. 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, end the audio memory (#204), set the continuous shooting flag 2 to "0"#205>, and close the barrier (#204).
206), after returning the lens to standard (#207)
．． #208), skip the routine such as recording #97
Go to and 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 has been stopped, and the continuous shooting flag 2 is set to "0"(#209), and the spindle motor 3
7 to 0FFL (#210), close the barrier (#211)
, after returning the lens to standat (#212.#21
3), proceed to #88 and continue recording for the remaining time of the timer. Also, when proceeding to #112 with uncharged lock, if the continuous shooting flag is 2 or "1", the above #209
Similar to #213 to #213, processing to stop continuous shooting is performed in #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 in order to reduce the 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 the timer T to 9.6 seconds (s) #301), and start the voice memory and self-calling #302.
#30.3) During timer counting, the LED is blinked to indicate that self-counting or recording is in progress (#305). And while recording, #306. #
Detsuki Bodhisattva is opened at 308, or main switch S
When O is turned off, please reset the voice memory by self-cancelling as an indication of your intention to stop recording from the beginning #30
8) Return to the main flowchart. When recording continues until the timer counts up (YES in #304)
), exit the audio memory #309), and move to #71 of the S1 sequence.

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
Either the D blinks and is used to indicate the self-count and recording in progress, or the selfie LED is also used to indicate that recording is in progress when recording during normal shooting (for example, single mode). Good too.

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

, photometric elements SP, AVE, and photometric port 1i416.
17, photometry is performed (#401), and the photometric analog data is A/D converted by the A/D conversion circuit 18, and taken into the CPU 1 (#402 to #404>).

Next, check whether the AF is locked without pressing the switch S1 (#405>, if NO, the brightness photometric value Bv of the center (spot) will be higher than the brightness photometric value Bv2 of the surroundings
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 Abe photometric value Bv2 is set as the background or sub-subject brightness BvA (#408), and #4゜5
If it is AP locked, #406. Proceed to #408 without processing #407. Here, the AP lock at #405 is #1 in the S1 sequence in Figures 3 and 4.
This is only the case when moving from #08 to #66 and performing photometry/AB calculation.

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 level δ (#411).If ΔBvS is smaller than δ, it is assumed that the degree of backlighting is low (frontlighting), and the weighted main subject brightness Bvs is 1/8 BvS.
+7/8 B vA is used (#412). on the other hand,#
If ΔBvS is larger than δ in 411, the degree of backlighting is considered to be large (backlighting), and a backlight flag is set to "1".#
415), and set BvS to Bvs- (#416).

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

Subsequently, when the above process #412 is performed, Bvs
Check whether the brightness is higher than the camera shake limit brightness BvH (#414), and if this or YES is determined to be brighter than the camera shake limit brightness, enter natural light shooting mode ■, and if NO, it is determined that it is dark and the dark Enter flash photography mode■. Further, when the process of #416 is performed, it is checked 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, it is bright backlight, so set the road flag and set it to "1"#418), backlight flash photography mode■
On the other hand, if NO, the background is backlit or the background is dark, so the dark flash photography mode ■ is entered.

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 v M, the value Av corresponding to the aperture of the lens, and the value Sv corresponding to the sensitivity of COD (both are apex values), B
Let VM=TvM+Av-Sv (#420).

Next, the result obtained in #412 above is vs- and the above BvM
Compare the magnitude of BvS- or BvM (#421). If Bvs is larger than BvM, it is too bright, so use 5vO-1 as the sensitivity value S (#422). If BvS- is larger than BvM, process #422 above. without the need for boosting (
#423), move to 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)
, BvS+1 or BvH, the main subject brightness BvS plus IEv is set as the control brightness value BvT<#425). As a result, when using only natural light, the main subject will be photographed at an IEv degree below the appropriate value. On the other hand, if it is smaller than BvS+1 or 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 use the value ΔEvN, which indicates how much the main subject will be undershot from the appropriate level when photographed using only natural light, as 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 IEv (
#428), if larger, set ΔEvN to -IEv #4
29), then check whether ΔEvN is less than -3Ev (#430>, if YES, set the correction value K to 0 and #431); if No, that is, ΔEvN is -
1 to -3, the supplementary value K is (l/2)ΔEvN+
(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
Set vFL to the above correction value +0.5 #434),
If it is less than 5 m, the tuning light correction value ΔEvFL is set to the above correction value (#435).

Next, set the initial setting ISO sensitivity SvO to I of CCD 31.
The SO sensitivity value Sv is determined by #436), and the controllable maximum brightness BvM at the brightest time is determined by the maximum shutter speed TvM, the lens aperture value AV, and the above sensitivity value Sv.
After setting B v M = T v M + A v - S v (#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 is a bright time, and the ISO sensitivity Sv is set to 5vO-1 #43
9), then the maximum controllable brightness BvM-
Similarly, using TvM+Av-8v (#440),
Again, the control brightness value BvT is the maximum controllable brightness B v M
”Check whether it is greater than or equal to (#441), and check if this comparison result is Y.
In ES, check the transparency flag (#442>, if the same flag is set, the main subject brightness BvS and the maximum brightness value B above)
Compare with vM- (#443), and if BvS or BvM is larger, the brightness of the main subject will be bright even in backlight and no flash is necessary, so set the transparency 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 clear 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, it is assumed that T v = B v T + S v - A v. Furthermore, check 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 less than or equal to the touch limit shutter speed TvH (#447), and if it is larger than Tvf) - TvH, the Tv calculated in #445 above is As it is, raise a flag indicating the need for boosting (#448) and move on to SL sequence. Also, the judgment in #446 and #447 is YE.
When S, Tv is TvM (#449), respectively.
Set TvH (#450) and proceed to #448.

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

In this mode, the sub-subject brightness 13 v A −1 is used as the control brightness value BvT (#451). As a result, when the main subject is properly exposed, the background will be overshot by IEv. After the process of #451, the process moves to #427, and the same process is performed thereafter.

In addition, in #40 above, if the lens is in a close-up state, proceed to #452, and set the camera shake limit brightness value at close-up to BvCU, and the camera shake limit shutter speed T.
vH and close-up aperture value AvCU and initial setting I
From SO sensitivity SvO, BvCU=TvH+AvCU-8
vO, and then compare this camera shake limit brightness value BvCU with the sub-subject brightness BvA (#453), and BvA is BvCU.
If it is larger, set the sub-subject brightness BvA+0.75 as the control brightness value BvT (#454), and set the flash emission timing Tv to the above BvT and initial setting ■So sensitivity SvO
From the aperture value AVCU during close-up, T v = B v T 10S v O-A v CU
Toshiki #455), boosting required #456), S1
Return to sequence. In addition, if BvA is smaller than BvCU, the camera shake limit shutter speed T v HC during close-up is set as the flash emission timing Tv (
#457), proceed to #456 above.

Next, the release sequence in 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 and #502), natural light photography will be used, and the center of the light receiving area (SP) and the periphery (A) will be taken.
Using the luminance data of VE) (#503), the above photometry/A
Weighting based on Bvs- determined in #412 of the E calculation sequence is added (#504). This weighting is performed by a circuit 20 based on a command from the CPU 1 (not shown in FIG. 1). Then, the timer t1 is set to the camera shake limit time t1□, and when the timer is started, dimming (H light) is started (#505, #506). Here is TvH.

tH-2 After the start of dimming, the reference standard potential ■0 that sets the appropriate exposure in the circuit 28 that controls the shutter opening time shown in FIG. 1, and the control potential V that changes according to the weighting added. (2) Exposure is ended when 0≧V. (#511.).

If the timer reaches t1-0 before reaching this ■0≧■ (YES in #508), compare the reference potential V1 (>VO) and the control potential V (#509), and if V is higher than vl ( #509 (NO), even after the camera shake limit time has elapsed, the subject is still dark and the exposure is not sufficient, so increase the gain by a predetermined amount in the gain control discrimination circuit 24 #5
22), the exposure is completed (#511). Also, #5 above
If it is 1 or more than V in 09 (YES in #509), the exposure is ended 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 central spot <sp> of the light receiving part (#512), add ΔEvFL and Sv found above as correction values #513), and use Bvs- found in #416 above. 5.14), check whether it is backlit from the above transparent flag (#515), and if it is not backlit (
Transparent flag - O), process #516 to #522 below, and if it is backlit (transparent flag = 1>, #523 to #52
7 is processed and the exposure is completed (#511).

In any of these processes, the timer t2=t+tF is set to zero.

A' Here, tA=2-TV until flash emission -TV
H 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
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, 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, when timer t2=O, it is processed whether to increase the gain or not. The exposure is immediately terminated (#511).

Also, when the lens is in a close-up state, #5
28 to #536 are performed, and the exposure is completed (#511). That is, in this process, similar to #503 above, the brightness data of the center spot (SP) and the periphery (Ave) of the light receiving section are used, and the correction of AvCU is added, and Bvs ''-(3/4)BvS+ ( 1/4) BvA weighting is added #530), and the same processing as #523 to #527 during backlighting described above is performed. Note that the camera shake limit time during close-up is set as T v HC.

is tHc-2 In addition, in the above embodiment, weighting is added in the case of close-up and natural light modes, weighting may be added also in backlighting, or the value may be determined separately. Good too.

[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 switch S1, FIG. 5 is a flowchart of the self sequence, and FIG.
A flowchart of the operation sequence. FIG. 7 is a flowchart of the release sequence. 1... CPU, 29... Microphone for recording, 30...
・Audio circuit (audio memory), 31...CCD,
34... Video recording circuit, 36... Spindle motor driver (driving means), 37... Spindle motor.

Claims (1)

[Claims] (1) A still video camera having means for recording images and sounds in a linked relationship, including an audio memory for temporarily storing input audio, and a recording circuit for recording the contents of this audio memory onto a floppy disk; a driving means for driving the floppy disk, at least from the start to the end of audio input to the audio memory;
An audio recording device for a still video camera, characterized in that the recording circuit and driving means are stopped.