JPH0244875A - Camera with sound recording function - Google Patents

Abstract

PURPOSE:To facilitate the control of signal processing at the time of sound recording, and to simplify constitution by discriminating whether recording is the recording of video information or the recording of sound information, and inhibiting the recording of date information when it is discriminated to be the recording of the sound information. CONSTITUTION:A means to discriminate between the recording of the video information and the recording of the sound information and the means to inhibit the recording of the date information when it is discriminated to be the recording of the sound information are provided. These means are constituted of a sound recording switch S3 and a CPU 1, etc. In such a camera capable of recording a video and a sound corresponding to it and the date information at the time of photographing, since the camera is constituted so that the date information is recorded at the time of the recording of the video and is not recorded at the time of the sound recording, the control of the signal processing at the time of the sound recording becomes easy and the constitution too becomes simple.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a camera with an audio recording function.

[Prior Art] In a camera with a recording function such as a still video camera, it is possible to record video and audio information as well as date information of the shooting date on a floppy disk track. Devices that can output date information on the screen are known. Normally, audio is recorded in correspondence with video, and it is possible to record approximately 10 seconds of audio on one track. Conventionally, data 1 to information was recorded to video 1 to audio tracks as well. Since the audio is also recorded, it is not easy to control the signal processing during recording, and the configuration is complicated.Since the audio is usually recorded in correspondence with the video, data 1 to information is stored on the audio track. No need to record.

[Problem to be solved by the invention] The present invention is capable of recording audio corresponding to video,
In addition, the camera is capable of recording date information at the time of shooting, but the date information is not recorded when recording audio information, making it easier to control signal processing during audio recording and simplifying the configuration. Audio recording 8! The purpose is to provide a camera with the following functions.

[Means for Solving the Problems] The present invention provides a camera having a means for recording video information, a means for recording audio corresponding to the video, and a means for recording date information at the time of shooting. The device is equipped with means for determining whether information is recorded or voice information is recorded, and means for prohibiting recording of date information when it is determined that voice information is recorded.

In addition, each of the above means is a recording switch S3 in the following embodiment.
, cpui, etc.

[Function] In the above configuration, date information is recorded during video recording,
Since audio information is not recorded during recording, signal processing during audio recording can be easily controlled.

[Effects of the Invention] As described above, according to the present invention, there is provided a camera capable of recording video, audio corresponding to the video, and date information at the time of shooting. Therefore, signal processing during audio recording can be easily controlled and the configuration can be simplified. (
Embodiment FIG. 1 shows a block configuration of an embodiment of a still video camera equipped with the 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 (AF) circuit section, which includes an AF circuit 9 that outputs focus and distance information to the CPUI, a lens extension motor 10, a lens stop magnet 11, and a lens position detection encoder 12. 13 is a lens switching/barrier opening/closing circuit, and 14 is its motor. For example, when the motor 14 rotates forward, the lens is sequentially switched between standard and close-up, and 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 Shina barrier is opened and closed.

Reference numeral 15 denotes an automatic exposure (AE) circuit section, and this circuit section 15 has a spot photometering aperture F! which inputs the detection signal of the photometering element SP that measures the subject brightness at the center spot of the photographic screen.
@16, a photometry circuit 17 that receives as input the detection signal of the photometry element AVE that measures the brightness of a subject in the peripheral area of the photographic screen, an A/D conversion circuit 18 that converts these detection data into A/D, and this A/D conversion data. There is one serial communication interface for serial communication with the CPU that receives the data, and a serial communication interface that performs serial communication with the CPU. It consists of a weight receiving circuit 20 that performs weighting, a level shift circuit 21 that shifts the level of a signal based on the output of this weighting circuit 20, and a command from a CPU via one interface.

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 to close the capacitor. The switch 26 that releases the short circuit of the capacitor 25 and the connection point potential ■ between the capacitor 25 and the output part of the level shift circuit 21 are referenced to 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 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.

24 is a gain control discrimination circuit, which determines whether a predetermined exposure (exposure amount one predetermined amount less than the appropriate exposure) can be obtained even if the camera shake limit time is exceeded, depending on the output of the comparator 27 and the close signal from the shutter control port FI@23. A signal for electrically controlling the gain of the video recording image signal is given to the CPU 1 when, for example, the gain of the video recording image signal is controlled.

2 are microphones for recording, and 30 is an audio circuit that operates in response to a recording control signal from the CPU, 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 ccD), which is a solid-state image sensor that converts optical image information into an electrical signal;
2 is a driver that drives the CCD 31, and this COD driver 32 receives the output of the COD shutter control circuit 23, C
It operates in response to the ISO sensitivity switching signal from the 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. Digital information signal (year, month, day, track number, etc.) displayed simultaneously with the image, gain control output, synchronization signal PG
It operates according to the following.

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

38 is the magnetic head 35 according to a command from the CPUI.
A Stella Pink motor driver 39 is a Stella Pink motor for moving the Stella Pink motor 3.
9, the magnetic head 35 is controlled to move to a predetermined track position on the floppy disk. 40 is a head holding plunger for setting the head at a predetermined position during recording (@recording).

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 insertion tube's insert lid is left open, etc.
A psar that generates a sound to alert the user, 4
5 is activated by the output of CPtJl 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 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.
Switch S4 that switches between single shooting (S, standard mode), continuous shooting (C), which takes multiple photos, and self-timer (SELF), which takes photos using a self-timer. , day 1-1N report changeover switch S
5. A date information correction switch S6, a switch S7 that detects the open/closed state of the deck lid, a switch S8 that detects the floppy insertion state, a switch S9 that detects the presence or absence of the floppy write-protection claw, and the open and closed positions of the above-mentioned barrier. Switches SIO and Sll that detect the position, switch S12 that detects the initial position of the lens, and lens changeover switch S13 that changes the lens to a close-up state during close-up photography.
, close-up lens in position (close-up state)
and a switch SL4.815 for detecting the suspended position (stand start state), and a switch S16 for detecting 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 inputted by the user before shooting and stored in the memory in the CPUI. Based on this memory information, the CPU 1 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 same figure, when the power is turned on to the CPUI, the CPU1 is reset (#1.), and the reset flag is set to "1"(#2).
Initialization of flags and RAM, lens and magnetic head 35
Initial settings are performed to set the cell to the initial position (#3). Note that 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, but on the LCD, etc. Warning is given by flashing the part. Next, check to see if there is a battery (#4), and if there is no battery, execute the battery removal routine (#5), and if there is a battery, check the state 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), 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 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. Process the S1 sequence (shown in Figures 3 and 4) (#13.#i4>. If the switch S1 is OFF or has remained ON from before, proceed to the S1 sequence, the lens Check the state of the close-up switch S13 (#15) - If this is turned on, the lens switching routine (#16) is processed.

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 there is a date switching correction mode, this correction mode is exited (#18), and the mode change routine (#19)
process. Through this mode change process, as described above, one of the single, continuous, and self shooting modes is stored in memory. Next, check the state of the recording switch S3 (#20), and when it is turned on, the date flag is similarly set to "0", and if it is in the date changeover correction mode, this correction mode is set to C-. (#21), and processes the recording switching routine (#22).

Note that the close-up switch 51-3 and the mode changeover switch S4. -8, the sound switch 83, etc. all transition to a different state each time they are pressed (turned on),
If you press the button as many times as there are existing states, it will return to its original state.

After that, check the status of the date selector switch S5 (#23
), when this is turned ON, the date flag is set to rL+ 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 and #30), and perform a date correction routine (#31). process. 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
O of Siegen's test light/distance switch S1, which will be described later.
Even if it is N, the date switching correction mode will be exited.

After that, it is checked whether the charging circuit of the flash 41 needs to be boosted (#34), and if boosting is necessary, it is checked whether charging is completed (#35), and if it is not completed, the boosting is started (#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 (838), and check whether the deck lid is open or closed (#44) until the predetermined time has elapsed (No at #39). Until the predetermined time set by the second timer has elapsed (
#45: NO), switches So, SL, S3. S4. S
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 #4.
Return to 39.

Also, if the predetermined time set by the first timer has not elapsed in #3 above, check the setting mode (#40), and if it is selfie or continuous shooting mode, change to the standard single mode.#4 .1) and further check the condition of the lens (#
42), if it is close-up, change to stunt start #43), then proceed to #44 above. Further, when the predetermined time set by the second timer has elapsed 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 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 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, and moreover, when the self-mode is selected, recording is performed during the self-timer.

In Figure 3, it is necessary to stop boosting the voltage to prohibit charging during video recording.
”, 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 drives the floppy disk (#64)
, if it is self-timer', then the spindle motor 37
Do not turn on.

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
oNt, (#7],), then open the barrier (#72
), operates the lens extension motor 10 to extend the lens to the in-focus position (#73), processes a release routine (#74) to be described later, and records the image onto a floppy disk using a recording device such as the video recording circuit 34. Do (#7
5). 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, move the magnetic head 35 to the next empty position (#76), reset the lens (#77), and check whether the mode selection memory information is the snapshot mode (#78).
, if it is not continuous shooting mode, reset the continuous shooting flag 2 (#79), and turn off the spindle motor 3 to indicate the end of image recording.
7 to 0FFL (#80), close the barrier (#81)
, return the lens to the standat. (#82.#83)
.

Furthermore, if it is not self mode (No in #84), check the memory information according to the setting of the recording switch S3 (#85
), in recording mode, the recording operation begins. Set the recordable timer time T of the audio memory to 9.6 seconds (s) (#86) and start the audio memory (#87). Then, the timer counts down and checks whether T=O (#88), and before reaching that point, checks whether the photometry/distance measurement switch S1 has changed from OFF to ON (#89).
. Here, in order to indicate that the operator does not want to stop recording midway, the switch S1 is set to be turned on again from 0FFL, so if you press #8 to indicate YES, that is, to stop recording, , sets the 83 count to "0"(#90), which will be described later, and ends the audio memory (#95>).

If No in #8 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 is ON up to t, then check whether the recording switch S3 has changed from OFF to ON (#93).

One reason for this is that the user can indicate his/her intention not to perform additional recording for one captured image by pressing the recording switch S3. That is, recording switch S3
When you press once, the 83 count is incremented (#94>, and returns to #88.
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, making it possible to perform additional recording by the number of 83 counts.

When the timer reaches T=O, end the audio memory #95
), turn on the spindle motor 37 (#96), and record audio (#97). Here, track No.
and audio-compatible track N.

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", the mode is returned to the standard single if it is self-shooting or continuous shooting (#102 #103), and then the process returns to #4 of the main flowchart. Further, if the count is 83 or 0 in #100, the count is decremented by 83 (#101), and the process returns to #86. Additional recording is thus performed.

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

Also, if continuous shooting mode is set in #78 above,
Set continuous shooting flag 2 to "1"#104),#65
Continuous shooting is executed by returning to and cyclically processing the above routine. Here, no recording was made 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 open/close status of the deck lid, 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 or ON.
, if it is ON, the process returns to #66, and if it corresponds to either 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, if there is bright backlight and the release switch S2 is turned on (#11] - YES), the process proceeds to #69 above, but otherwise it does not indicate whether or not continuous shooting is in progress. I went to check the photo flag 2 (#112), and when I saw it during continuous shooting, it was a so-called uncharged lock (this happens when it gets dark in the middle of 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 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, 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 while waiting for charging to complete (#124), and turn on the spindle motor 37 (#125).
) and take a photo <(Proceed to #69). Also, #12 above
If the judgment in step 2 is No, that is, when it is dark or #123
When the release switch S2 is OFF, the above #11
Return to 5. Further, when the deck lid is opened in steps #119 to #121, the main switch SO is OFF, and either the photometry/distance measurement switch S1 is OFF, the process exits the S1 sequence and moves to #4 of the main flowchart.

Incidentally, if the self mode is stored in memory and the sequence of the same mode (#70) is not processed, since recording has already been completed, 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, in this embodiment, recording is performed during the self-timer run 1 to 2), 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 #
The process advances from 78 to #1o4, and after setting the continuous shooting flag 2 to "1", a recording operation is performed. i.e. Thailand'? Set T=9.6 seconds (s) #201), start voice memory #202), return to #65 from #203 until T=O, and repeat this routine for continuous shooting. and recording is performed.

When T=O, the voice memory is terminated, #204>
, set the continuous shooting flag 2 to "0"#205>, close the barrier (#206), and return the lens to stand-by mode (#205).
207. #208>, skipping the recording routine and proceeding to #97 to record the audio.

Also, go from #68 to #105, and here continuous shooting flag 2
If it is "1", it is determined that continuous shooting has been stopped, so the continuous shooting flag 2 is set to "O"(#209), and the spindle motor 3
7 to 0FFL (#21Q) close the barrier (#211),
After returning the lens to standard (#212.#213
), the process moves to 188, and recording continues for the remaining time of the timer. Also, if the continuous shooting flag 2 is "1" when proceeding to #112 with uncharged lock, the above #209~
Similar to #213, processing for stopping 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, in order to reduce the time lag during continuous shooting, the S1 sequences shown in FIGS. 3 and 4 are set to open the barrier.

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, the LED is blinked to indicate that self-counting or recording is in progress (#305). And while recording, #306. #30
When the deck lid is opened at step 8 or the main switch SO is turned off, the voice memory should be reset as a self-release signal to stop recording from the beginning #308)
, return to the main flowchart. When recording or timer count-up has been completed (YES in #304),
Close the audio memory #309), # of S1 sequence
Move to 71.

In the self-mode, the audio memory is recorded on the floppy disk at step #97 in step #75 in Figures 3 and 4.
The ED blinks to display the self-count and the recording in progress.Even when recording during normal shooting (for example, single mode), this self-service LED can also be used to indicate that recording is in progress. It's okay.

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 AP is set without pressing the switch S1 (#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), Also, set the above-mentioned Abe metering value Bv2 as the background, that is, the sub-subject brightness BvA (#408), #406 if the AF is locked at #4°5. Proceed to #408 without processing #407. Here, the AP lock at #405 is #10 in S1 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 BvSO obtained above, that is, the degree of backlighting ΔBvS (#41.0 ), compare this value with the backlight detection level δ #411) If ΔBvS is smaller than δ, the degree of backlighting is small (frontlighting), and the weighted main subject brightness Bvs- is 1/g B v
Using S +7/8 B vA (#412), while
If ΔBvS is larger than δ in #411, the degree of backlighting is large (backlighting) and a backlight flag is set to "1"(#415), and BvS is set to Bvs- (#41.6).

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

Next, when the above process #412 is performed, Bvs
Check whether - is higher than the camera shake limit brightness BvH (#414), if YES, it is judged that it is brighter than the camera shake limit brightness and enters natural light shooting mode ■, and if No, it is judged that it is dark and flashes in the dark. Enter shooting mode ■. Also, 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 a bright backlight, so set the path flag and set it to "1"#418), and enter the backlight flash shooting mode. Enter shooting mode ■.

Here, we will first explain the natural light shooting mode ■.

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
vM, a value Av corresponding to the aperture of the two lenses, and a value S corresponding to the sensitivity of COD.
From v (all apex values), B v M = T
v M +A v −S v (#420).

Next, the result obtained in #412 above is vs- and the above BvM
Compare the size of #421), if it is larger than Bvs or BvM, it is too bright, so set the sensitivity value Sv to 5vO-1
is used (#422), and if Bvs'' is not greater than BvM, the above process of #422 is not performed, it is determined that boosting is not required (#423), and the process moves to the S1 sequence.

Next, to explain the dark flash photography mode (#424), let's compare the main subject brightness BvS plus IEv and the camera shake limit brightness BVH.
, BvS+1 is not smaller than 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 fall from an appropriate value to 1. Only Ev will be photographed below. On the other hand, BvS+1 is Bv
If it is smaller than H, the main subject is dark, so the control brightness value Bv
Set camera shake limit brightness BvH as T (#426
).

Furthermore, in order to calculate the correction value for flash dimming, the value ΔEvN, which indicates how much the main subject will be undershooting from the appropriate level when not photographed in full natural light, is calculated using the main subject brightness Bv
Obtained from the difference between S and the control brightness value BvT (#427),
Check whether this value ΔEvN is greater than 1 Ev (#428>, if it is, set ΔEvN to -IEv #429), then check whether ΔEvN is less than -3Ev (#430), If YES, the correction value I is set to 0 (#431); if NO, that is, Δ
When EvN is between -1 and -3, the correction value K is (1/2)
ΔEvN+(3/2) (#432).

Next, check whether the main subject distance is 5m or more (#4
33), 5m or more, the flash dimming correction value Δ
Please set EvFL to the above correction value ■kumo 0.5 #434
), if it is less than 5 m, the tuning light correction value ΔEvFI- 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.
Therefore, 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 (#4.38 >.If the comparison result is YES, it means it is bright, and set the ISO sensitivity Sv to 5vO-1#.
439), followed by the maximum controllable brightness Bv at this time.
M-, similarly use T v M + A v - S v (#440), check again whether the control brightness value BvT is greater than or equal to the maximum controllable brightness BvM- (#441), and if the result of this comparison is YES. Look at the transparent flag (#442)
If the same flag is set, compare the main subject brightness BvS and the maximum brightness value BvM- above (#443). If BvS is greater than BvM-, the main subject is bright even if it is backlit and no flash is necessary. Transparent frac "0"
” (#444) and shifts 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 controlling the brightness value BvT, ISO sensitivity value Sv, and lens aperture value A.
From v, let T v = B v T + S v - A v.

Furthermore, it is checked whether the flash emission timing Tv is equal to or higher than the maximum shutter speed TvM (#
44.6), if Tv is smaller than TvM, check whether the same timing Tv is below the touch limit shutter speed TvH (#4.J7), and if TV is larger than TvH, find it in #445 above. A flag indicating that the voltage needs to be boosted is set (#448), and the process moves to the SL sequence. Also, the determination in #446 and #447 is Y.
For ES, Tv and TvM (#449>
, set TvH (#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 at an IEv overshoot. 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, close-up aperture value AvCU, and initial setting ISO sensitivity SvO, B v CU = T v
Set H+ A v CU-3v O, then compare this camera shake limit brightness value BvCU and the sub-subject brightness BvA (#453). If BvA is larger than BvCU, set the sub-subject brightness BvA-1-0,75. As the control brightness value BvT (#454), set the flash emission timing Tv from the above BvT, the initial setting ISO sensitivity SvO, and the aperture value for close-up AvCU as follows: Tv=BvT+SvO~AvCU#455), and the boost is necessary.# 456), S1
Return to Siegens. If it is smaller than BvA or BvCU, set the camera shake limit shutter speed TvHC during close-up as the flash firing timing Tv (#4
57), 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 spot (sp) of the light receiving area and the periphery (AV
Using the luminance data of E) (1503), the photometry/AE
It is determined in step #412 of the operation sequence, and weighting based on vs. 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.

tH=2 After the start of dimming, the reference standard potential VO that sets the appropriate exposure in the circuit 28 that controls the opening time of the shutter shown in FIG. The exposure is completed when 0≧V is reached. (#511).

If the timer reaches t1-0 before this VO≧■ is reached (Compare YES reference potential v1 (>VO) and control potential ■ in #509), if
(NO in #509), even after the camera shake limit time has elapsed, the subject is still dark and the exposure is not sufficient, so the gain control discrimination circuit 24 increases the gain by a predetermined amount #5
22), the exposure is completed (#511). Also, #5 above
If it is 1 or 7 or more 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 the 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 intermediate flag (#515), and if it is not backlit (transparent 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, timers t1t and t2-tH+tF are set.

A' Here, -Tv until flash emission at tA=2''
H is the hand wave timing time, tH-2 is the limit time, and t is the flash 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 is reached. 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-1 (3/4) BvS+ ( 1/4) BvA weighting is added (#530), and the same processing as #523 to #527 in the case of backlighting described above is performed. Note that the camera shake limit time during close-up is −TvHC.

is tHo-2 In addition, in the above embodiment, weighting was added in the case of close-up and natural light modes, but weighting may also be added 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, and FIG. 7 is a flowchart of the release sequence. DESCRIPTION OF SYMBOLS 1... CPU, 29... Microphone, 30... Audio circuit, 31... CCD, 32... CCD driver, 34... Video recording circuit, 35... Magnetic head, S3...・Recording switch. Applicant Minolta Camera Co., Ltd. Agent
Patent Attorney Yasuo Itaya 3rd

Claims (1)

[Claims] (1) In a camera that has a means for recording video information, a means for recording audio corresponding to the video, and a means for recording date information at the time of shooting, it is possible to decide whether to record video information or audio information. 1. A camera having an audio recording function, characterized in that it is equipped with means for determining, and means for prohibiting recording of date information when it is determined that recording of audio information is being performed.