JPS62285201A - Still recording device - Google Patents

Abstract

PURPOSE:To easily use a camera by using an indicator so as to display which of a 1st switch or a 2nd switch is to be operated depending whether a video signal and an audio signal are recorded singly or they are recorded correspondingly so as to eliminate the need for the memory of the operating history and the relation of corresponding of a shutter switch and a sound recording switch. CONSTITUTION:At the time of depressing a corresponding switch 71 or 72 according to the blink of an LED 91 or 92, the recording of post-recording or pre- recording is attained, in depressing the opposite switch 72 or 71 while neglecting the blink of the LED 91 or 92, the voice or picture is recorded singly. Thus, in the case of the recording of post-recording mode or pre-recording mode, the loss of the correspondence between the picture and audio or the loss of the single recording of the picture and audio is eliminated, and the intentional recording is applied.

Description

[Detailed description of the invention] Detailed description of the invention The explanation will be given in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem (Fig. 1) F. Effect G. Example G1 First example (Fig. 1) 1 to 8) G2 Other Embodiments H Effects of the Invention A Industrial Field of Application This invention relates to still recording devices such as electronic still cameras.

B. Summary of the Invention This invention provides a still recording device such as an electronic still camera that is capable of recording audio signals as well as video signals, by providing a predetermined circuit in its control system. This allows for proper recording of information.

C. Prior Art In electronic still cameras, an l-field video signal is recorded as a single circular magnetic track on a video floppy. In this case, there are two recording modes for video signals: "field recording" and "frame recording." In field recording, one field of video signals is recorded on one magnetic track for one recording. During frame recording, one frame of video signal is recorded for one field each on two adjacent magnetic trunks for each recording. Further, the total number of tracks is 50.

Further, in such a camera, a camera is being considered in which, when a recording switch is pressed, the audio signal is recorded on a track separate from the video signal.

In this case, the audio signal is, for example, 1/(i40
The data is compressed on the time axis and recorded, and the track is used at about 1/4P. In other words, one track is divided into four sectors, and each sector records audio signals of 150 field periods (approximately 2.5 seconds) compressed on the time axis. For example, when recording 15 seconds of audio, 6 sectors (1.5 tracks) are used because 15 seconds/2.5 seconds=6. At this time, the second track has two remaining sectors at the back, but these are not used.
The next time the audio signal is recorded, it will be used from the beginning of the next track.

Here, the basic structure and operation of an electronic still camera that can also record audio will be explained with reference to FIG.

In Figure 1, (ll is the subject, (2) is the clothing (elephant lens), (3) is the shutter, (lO) is the video signal system, (2) is the
0) indicates an audio signal system. In this example, the shutter (3) is an electromagnetic shutter, and the image sensor (11) of the video signal system (10) is a CCD having a color separation filter.

In addition, (51) indicates a video floppy, and the magnetic sheet built in this floppy (51) is connected to the rotating shaft (52).
The magnetic sheet is rotated by a motor (53) at a field frequency, and a magnetic head (
31) and (32) are placed in opposition. In this case, these heads (31) and (32) are provided at equal angular positions with respect to the direction of rotation of the magnetic sheet, and so as to be in contact with adjacent magnetic trunks, respectively.

A motor (58) is mechanically coupled to these heads (31) and (32), and the motor (58)
5B) is supplied with a predetermined drive voltage from a controller (59), so that the track positions of the heads (31) and (32) can be changed arbitrarily.

Furthermore, (60) indicates a system controller that controls the overall operation of this camera. This system controller (60) is composed of a microcomputer (
6I) is the CPU, (62) is the ROM in which programs for various processing are written, (63) is the RAM for the work area, (64) is the human powered boat, (65) is the output boat, and these circuits (62) to (65) are connected to the CPU (61) through a system bus (66). This system controller (60) has a shutter switch (71) for shooting and an audio recording switch (72).
, a mode switch (73) for selecting field recording and frame recording, and a detection switch (74) are ffi
It is continued. Note that the switch (74) is for detecting when a floppy disk (51) is inserted into this camera.

A pulse generating means (54) is provided opposite the center core of the floppy disk (51). P (5
1) One pulse Pg per rotation of the magnetic sheet
is extracted as a signal indicating its rotational phase, and this pulse Pfl is sent to the system controller (6) through a shaping amplifier (55).
0), and the system controller (60) supplies the switch (
Various control signals are extracted at predetermined timings in response to the operations 71)' and (72). In addition, from the system controller (60), there is a circuit (15).

(2B), (33), and (34) are also supplied with respective control signals.

Further, (80) indicates a clock forming circuit, which is supplied with pulse Pg and control signals from the system controller (60) to form various clocks at predetermined timings.
Supplied to each circuit.

Then, as shown in FIG. 2A, when the shutter switch (71) is pressed at an arbitrary time t1, a control signal is supplied from the system controller (60) to the shutter (3), and as shown in FIG. The shutter (3) opens from L0 to t2 and the image of the subject (1) is projected onto the CCD (11), and C0
A charge image is accumulated in D(11).

Then, when the switch (73) is set to the field recording mode, the time point L of the first pulse pg after the time point L2, as shown by the solid line in C and D of the same figure.
], from this time t3 to the time L of the next pulse pg
The formation circuit (80
) to CCD (11) read clock l? DcX is supplied, and color video signals S and C for one field are taken out from the CCD (11) as shown by the solid line in the figure.

This signal Sc is then supplied to the video processing circuit (13) through the preamplifier (12), where the luminance signal and color signal are extracted from the signal Sc, and these signals are transferred to the recording circuit (13).
4) and has data such as field recording or frame recording.
d is supplied from the system controller (60) to the recording circuit (14). The sum of the line-sequential FM signal modulated by the color difference signal and the DPSK signal modulated by the data signal Sd is defined as Sv. Then, this signal Sv is supplied to the switch circuit (15), and a control signal is supplied from the system controller (60) to the switch circuit (15), and as shown by the solid line in FIG. Sv is taken out, and this signal Sv is supplied to the recording head (31) through the recording amplifier (16) and the video side contact of the -video/audio switch circuit (33), and is sent to the floppy disk (51). Recorded as a circular track.

On the other hand, when the switch (73) is set to the frame recording mode, the signal RDCK is output to the CCD (II) over a frame period t3 to t5 from time t3, as shown by solid and broken lines in C of the same figure. Therefore, as shown by solid lines and broken lines in E and F of the figure, signals Sc and Sv are respectively taken out over one frame period t] to L5 from time t3.

The signal Sv then passes through the switch circuit (15) and recording amplifier (16) to the switch circuit (33).

(34) and the switch circuit (33)
.

(34) is controlled by the system controller (6o), and the signal Sv in the first half field period t3 to t4 is controlled by the switch circuit (
The signal Sv in the latter field period t4-t5 is supplied to the head (31) through the switch circuit (33).
) is supplied to the head (32). therefore,
One frame of signal Sv is recorded on the floppy disk (51) as two adjacent magnetic tracks.

Further, as shown in FIG. 3A, when the recording switch (72) is turned on during an arbitrary period Ta, the audio signal during the on period Ta is recorded. That is, an audio signal Sa from a built-in microphone (21) is supplied to a low-pass filter (23) through a preamplifier (22), and is band-limited and extracted to a signal Sa of, for example, 5 kllz or less, and this signal Sa is used as a noise signal for recording. The signal is supplied to a time axis compression circuit (25) through a reduction circuit (24). This compression circuit (25) includes, for example, an A/D converter, a pair of memories that have a capacity for 150 field periods and perform reading and writing alternately, a D/A converter, and the memory. As shown in FIG. The data is read out and D/A converted at a speed 640 times faster than the original data. Therefore, from the compression circuit (25), 15
For each 0 field period, a signal St is obtained by compressing the time axis of the signal Sa of the 150 field period to a little less than 1/4 field period. In addition, the signal S before time axis compression
Since the band of a is 5kllz, the signal S after time axis compression
The band of t is 3.2 MIIz, which is 640 times larger, which is almost the same band as the video signal recorded on the floppy disk (51).

Then, this signal St passes through the adder circuit (26) to the FM
The signal Sf is supplied to the modulation circuit (27) and converted into an FM signal Sf, and this signal Sf is supplied to the switch circuit (28), and a control signal is supplied from the system controller (60) to the switch circuit (28) to generate the signal SL. A signal Sf is taken out during the period , and is supplied to the recording head (31) through the recording amplifier (29) and the switch circuit (33), and is sequentially recorded on another trunk of the floppy disk (51).

Also, at this time, from the system controller (60) to the encoder (4)
1), and an identification signal Si is generated for each signal St, as shown in the third diagram, for example. This signal St indicates, in the case of a certain signal St, whether there is a next signal St after 150 field periods, or whether the signal St is the last signal, that is, whether the signal SL continues thereafter. It has a flag and a code signal indicating the trunk or sector number when the tracks or sectors are consecutive.

This signal Si is then supplied to the adder circuit (26), added to the signal St, and recorded on the floppy disk (51) as the signal SL as described above.

The above is the basic configuration and operation of an electronic still camera that can also record audio.

By the way, in such an electronic still camera with an audio recording function, it is possible to record images and sounds in association with each other, and in that case, the following two recording modes are possible.

(i) Post-recording mode In this mode, as shown in FIG. 4A, an arbitrary time point tv (=1
1), when the shutter switch (71) is pressed, the image of Lv at that time is transferred to the floppy disk (
51), and then the recording switch (72) is pressed for the period Ta, the mode is such that the audio of the period Ta is recorded on the floppy disk (51), as explained with reference to FIG.

In this case, when audio is recorded, the number of the track in which the image at time tv is recorded is recorded in the audio trunk as part of the identification signal Si.

However, in this dubbing mode, as shown in FIG. 4B, the shutter switch (71
) and then press the shutter switch (71) again at time tv on the right side of the figure without recording the sound, the image at time tv (on the left) will be "single recording" without the corresponding sound. It is said that

Furthermore, even in the dubbing mode, as shown in Figure C, even though the shutter switch (71) is not pressed,
Or, as shown by the broken line, when the recording switch (72) is pressed during period Ta following dubbing (A in the same figure),
The audio during the period Ta is "single recording" without a corresponding image.

(ii) Pre-record mode As shown in FIG. 5A, if the recording switch (72) is pressed for an arbitrary period Ta, this
The voice of a is recorded in Flo Novy (51), and then when you press Sha Notasui Nochi (7■) at time LV (=t1), the image of LV (elephant is Flo Novy) at this time 51)
This is the mode recorded in .

In this case, when audio is recorded, the audio signal Sa that is supposed to be recorded in the last selector is stored in the memory of the time axis compression circuit (25) and is held until the time point t.
After one image is recorded at v, it is read out from the memory as a signal SL and recorded in the last sector of the period Ta of Flow Novy (51), and at this time, the time tν
The number of the track on which the image is recorded is simultaneously recorded as part of the identification signal Si.

However, even in this pre-recording mode, as shown in FIG. When the following (
The image at time tv (on the right) is considered to be a "single recording" without corresponding audio.

Furthermore, in this pre-recording mode, as shown in FIG. Of the audio signal Sa of the period Ta (on the left), the remaining signal Sa held in the memory of the time axis compression circuit (25) is changed from the signal Sa of the previous period Ta at the start of the subsequent period Ta (on the right). Recorded in the last sector, this audio is considered to be a "single recording" without a corresponding image. Furthermore, the audio signal Sa of the later period Ta is processed in the same manner as in the case of A in the figure, and the signal Sa that should be recorded in the last sector is held in the memory.

(References: Japanese Patent Application Laid-Open No. 58-218004 and Japanese Patent Application No. 1983)
(Specification and drawings of No. 0-139874, etc.) D Problems to be Solved by the Invention The above-mentioned use of the dubbing mode and the pre-recording mode can be realized by providing a mode changeover switch in the camera. - However, in either case, when using the camera, the user must always keep in mind the operation history and correspondence of the shutter switch (71) and recording switch (72).

However, this is inconvenient and may result in not being able to record as intended or in incorrect correspondence (combination) between images and audio.

This invention attempts to solve these problems.

E. Means for Solving the Problems Therefore, in the present invention, it is arranged to display which of the images and sounds should be recorded next.

F. Effect When the user presses the switch (71) or (72) according to the display, images and sounds are recorded in the correct correspondence relationship.

G Example G1 First Example In FIG. 1, the system controller (60) has a mode changeover switch (75
) is connected, and an LED (91), for example, is connected as a shirt indicator and a recording indicator.
(92) is connected. In this case, for example, as shown in FIG. 6, the LEDs (91) and (92) are installed close to the switches (71) and (72), respectively, and in a position that is easily visible to the photographer, for example, on the top of the camera. It will be done.

Then, the display of the LED (91) is controlled as follows.

Lit...Indicates "image recording in progress".

Lights off: Indicates "a case where an image is not being recorded and the shutter switch (71) is not operating in the order (order)".

Blinking...indicates "a case where an image is not being recorded and the shutter switch (71) is being operated". That is, this blinking indicates that the operation procedure is for dubbing or pre-recording.

Furthermore, the display of the LED (92) is controlled as follows.

Blinking...Indicates that "audio is being recorded".

Off: Indicates "when audio is not being recorded and there is no operation procedure for the recording switch (72)".

Blinking...indicates "the operation procedure of the recording switch (72)". That is, this blinking indicates that the operation procedure is for dubbing or pre-recording.

According to such a configuration, the switch (71).

(72) operating procedure and LED (91), (92)
) is shown in FIGS. 7 and 8, for example.

That is, Fig. 7 shows an example of the dubbing mode, in which A shows the operation status of the switches (71) and (72), B shows the image and audio recording state, and C shows the operating status of the switches (71) and (72). The display state of the LED (91) is shown, and the figure shows the display state of the LED (92).

Then, when the floppy disk (51) is set in the camera at time TO, it is detected by Sui Nochi (74) 4, and in this case, Suni Nochi (75) is switched to dubbing mode, so at the time LED from To
(91) flashes and to record in dubbing mode,
A message will appear telling you to press Shasota Sui Nochi (71).

However, ignoring the blinking of this LED (91),
~ If you press the recording switch 7 (72) at T2, audio will be recorded during this period T1-T2, and the LE
D (92) lights up to indicate that audio is being recorded. Note that this audio recording corresponds to the state shown in FIG. 4C, and is a single audio recording. Also, this period T1~
At T2 and thereafter, the LED (91) continues to blink, indicating that the shutter switch (71) should be turned once to perform recording in the post-recording mode.

Therefore, according to the blinking LED (91), time T
If you press Shasotas Jinnochi (71) at 3, the time point 'I゛3
An image is recorded at time T, and the LED (91) lights up at time T.
3, the light is lit for a predetermined period to indicate that an image has been recorded. Also, if you want to record in the dubbing mode when the ED (92) starts blinking at time T3,
If you press A, 7, C (72), the following message will be displayed.

However, ignoring the blinking of this LED (92),
When the shutter switch (71) is pressed at time T, an image is recorded at time T, and the LED (91) lights up to display that the image has been recorded. Then, by pressing the button 71 at time T, this corresponds to the state shown in FIG. 4B, so the image at time T3 is recorded independently. Further, each time the shutter switch (71) is pressed at time T, the LED (92) will blink even after time T4, indicating that if the recording switch (72) is pressed, it will be recorded in the dubbing mode.

Therefore, if the recording switch (72) is pressed during the period T5-T6, the audio during this period T5-T6 will be recorded, and the LED (92) will light up to indicate that the audio is being recorded. This state corresponds to the state shown in FIG. 4A, and the image at time T4 and the audio during period T5 to T6 are recorded in the post-recording mode.

Then, from time T6, the LED (91) blinks, and from then on,
The state is at time To or T2.

In the case of dubbing mode, the corresponding screen inch (
Press 71) or (72) to record in dubbing mode, ignore the blinking LED (91) or (92), and press the opposite switch (72) or (71) to record audio or images alone. becomes.

On the other hand, Fig. 8 shows an example of the pre-record mode, in which A shows the operating state of the switches (71) and (72), B shows the image and audio recording state, and C shows the LE mode.
The display state of D (91) and the same figure show the display state of LED (92).

Then, when the floppy disk (51) is set in the camera at time To, this is detected by the switch (74), and in this case, the switch (75) is switched to pre-record mode, so from time To, the LED ( 92
) flashes to indicate that in order to record in pre-record mode, the recording switch (72) should be pressed.

Therefore, according to the blinking of this LED (92), time T
If the recording switch (72) is pressed between 1 and T2, audio will be recorded during this period from T1 to T2, and the LE
D (92) lights up to indicate that audio is being recorded. Further, from time T2, the LED (91) blinks to indicate that the shutter switch (71) should be pressed in order to perform recording in the pre-record mode.

However, ignoring the blinking of this LED (91),
If you press the recording switch (72) at ~T4, audio will be recorded during this period from T3 to T4, and the LED will light up.
(92) lights up to indicate that audio is being recorded. Note that this audio recording corresponds to the state shown in FIG. 5C, and the audio during the period T1 to T2 is recorded alone. Also,
During this period T3 to T and thereafter, the LED (91) continues to blink, indicating that the shutter switch (71) should be pressed in order to perform recording in the pre-record mode.

Therefore, according to the blinking of this LED (91), time T
When the shutter switch (71) is pressed at time 5, an image is recorded at time T5, and the LED (91) lights up for a predetermined period from time T5 to indicate that the image has been recorded. This state corresponds to the state shown in FIG. 5, and is in the period T3 to T.

This means that the audio at time T5 and the image at time T5 were recorded in pre-record mode. Further, from time T5, the LED (92) blinks to indicate that the recording switch (72) should be pressed in order to record in the blur record mode.

However, ignoring the blinking of this LED (92),
When the shutter switch (71) is pressed, an image is recorded at time T6, and the LED (91) lights up to display that the image has been recorded. Since the shutter switch (71) was pressed at time T5, this corresponds to the state shown in FIG. 4B, so the image at time T6 is recorded independently.

Then, from time T6, the LED (92) blinks, and from then on,
The state is at time To or T5.

In this way, even in the pre-record mode, the LED (
If you press the corresponding switch (71) or (72) as the LED (91) or (92) blinks, it will be recorded in pre-record mode.Ignore the blinking LED (91) or (92) and press the opposite switch (72). ) or (71), the audio or image will be recorded individually.

In this way, according to the present invention, 1, the corresponding switch (71) flashes according to the blinking of the LED (91) or (92).
) or (72), you can record in dubbing mode or pre-recording mode, and the LED (91) or (9
2) Ignoring the flashing, press the opposite switch (72) or (7).
If you press 1), you can record audio or images individually.

Therefore, when recording in dubbing mode or pre-recording mode, the correspondence between images and audio may shift, or
Alternatively, it is possible to record as intended without having to record images or sounds alone.

Also, a shutter switch (71) and a recording switch (7
2) 1. There is no need to remember Eisaku history and correspondence relationships,
You can easily use the camera.

Furthermore, by operating the switch (71) or (72), it is possible to check in advance whether the individual recording of images or audio will be the corresponding recording.

02 Other Examples In addition, in the above, LED (91), (92
) may be integrated into the sui-nochi (71), (72), and the switches (71), (72) may be self-illuminated. Further, either the post-recording mode or the pre-recording mode can be used with a camera in one of the recording modes. moreover,
It can also be used for still recording video signals such as those from television broadcasts.

1-1 Effects of the Invention According to this invention, 1. According to the blinking of the LED (91) or (92), the corresponding switch (71) or (7)
2) If you press , you can record in dubbing mode or pre-recording mode, and if you ignore the blinking LED (91) or (92) and press the opposite switch (72) or (71), you can record audio or images independently. Records can be made.

Therefore, when recording in dubbing mode or pre-recording mode, the correspondence between images and audio may shift, or
Or, the image or sound may not be recorded separately (it is possible to record as intended).

Also, a shutter switch (71) and a recording switch (7
2) There is no need to remember the operation history or correspondence relationship, and the camera can be used easily.

Further, by operating the switch (71) or (72), it is possible to confirm in advance whether images or sounds will be recorded alone or in correspondence.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an example of the present invention, and FIGS. 2 to 8 are diagrams for explaining the same. (10) is a video signal system, (20) is an audio signal system, (51) is a video floppy, (60) is a system controller,
(91) and (92) are indicators.

Claims (1)

[Claims] A first signal system for recording a video signal on a video floppy as an annular magnetic track, and a first signal system for recording a time-axis compressed audio signal on another annular magnetic track of the video floppy. a second signal system, a first and second switch, and control the first and second signal systems based on the outputs of the first and second switches to generate the video signal and the audio signal. a control circuit for executing recording on the video floppy, and an indicator, and records the video signal and the audio signal individually or in association with each other in accordance with the operating order of the first and second switches. In addition, the indicator indicates which of the first and second switches should be operated when the video signal and the audio signal are recorded individually and when they are recorded in association with each other. Still recording device.