JP2003274252A - Camera-integrated recording and playing-back equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit which enables the system to perform the function of electronic zoom, TBC, static image capture, etc., without needing an expensive large-capacity memory. <P>SOLUTION: This is camera-integrated recording and playing-back equipment, and this is constituted such that it does not use a memory 2 when a zoom magnification is under two times, and that it writes only the image signals 2 of picture elements equivalent to the specified horizontal range of the image signals for the part of M lines without duplication in the image signals of N lines in total outputted from a solid image sensor 1 into the memory 2 when the zoom magnification is two times or over, and not only the storage capacity of the memory 2 can be made quarter the storage capacity of a one-field memory, but also it takes the effect of keeping its high picture quality even when the zoom magnification is under two times, and a TBC circuit for the time of playback motion can be constituted in condition that the storage capacity of the memory 2 is made quarter the storage capacity of the one-field memory. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a video movie,
The present invention relates to a camera-integrated recording / reproducing device with an electronic zoom function that uses a memory such as an electronic still camera, and more particularly to switching memory functions during recording and switching memory functions during recording and reproduction to perform signal processing. .

[0002]

2. Description of the Related Art FIG. 4 is a diagram for explaining a conventional electronic zoom circuit. When a camera operates, SW3 selects a terminal E and a CCD output from a solid-state image pickup device 30 (hereinafter referred to as CCD 30). The signal is subjected to predetermined signal processing in the signal processing circuit 31, and an image signal for one field is written in the field memory 32. Then, a read address corresponding to the electronic zoom magnification is set by a CPU (not shown) or the like, and the image signal is read line by line based on the read address.

FIG. 5 is a diagram showing that the image at the center of the screen is enlarged when the zoom processing is performed twice in the horizontal and vertical directions of the screen. The image signal for one field indicates the image signal for one field output from the field memory 32.

As described above, when performing the double zoom processing in the vertical direction, only the image signals of the lines in the predetermined vertical range of the screen are repeatedly output from the field memory 32 twice. The output image has half the resolution in the vertical direction of the screen as compared with the image written in the field memory 32.

Next, the image signal output from the field memory 32 is written into the line memory 33 for each line. Then, a read address corresponding to the electronic zoom magnification is set by a CPU (not shown) or the like, and the image signal is read out pixel by pixel based on the read address.

As shown in FIG. 5, from the line memory 33, only the image signals of the pixels in the predetermined horizontal range of the screen are repeatedly output twice, so that the output image of the line memory 33 is written in the line memory 33. The resolution in the horizontal direction of the screen is half that of the displayed image.

The image signal thus obtained is sequentially interpolated by the interpolating circuit 34, and is interpolated in the horizontal and vertical directions of the screen as shown in FIG.
Image signals for fields are generated.

Further, FIG. 4 shows a circuit for switching the function of the field memory 32 during the reproducing operation of the video tape recorder in the conventional electronic zoom circuit configuration to realize the reproduced signal jitter correction (hereinafter referred to as TBC) function. FIG. 7 is a diagram for explaining, when the video tape recorder is in a reproducing operation, SW3 selects a terminal, and a VCR reproduction signal 35 including jitter is written in the field memory 32 at a clock synchronized with the reproduction signal, and there is no jitter. The clock is read from the field memory 32, sent to the reproduction output signal processing circuit 36, and converted into a desired display signal form to remove the jitter of the reproduction video signal.

[0009]

However, in the conventional electronic zoom circuit as described above, in order for the video tape recorder to change the function of the memory at the time of the reproducing operation to realize the TBC circuit, the capacity of one field or more is required. It was necessary to mount an expensive memory provided, and it was very difficult to configure the TBC circuit at a low cost by switching the functions of the electronic zoom circuit and the video tape recorder during the reproducing operation. The present invention has been made in view of the above points, does not require an expensive large-capacity memory, and has an electronic zoom circuit,
Provided is a camera-integrated recording / reproducing device having a memory function applicable to a TBC circuit, a still image capture circuit, and the like.

[0010]

The present invention comprises means described in 1) and 2) below in order to solve the above problems.
That is, 1) a solid-state image sensor that repeatedly outputs an image signal of a predetermined line within one field period during a camera operation, and a memory in which only an image signal of a line corresponding to the predetermined vertical range is repeatedly read according to a zoom magnification. In a camera-integrated recording / reproducing apparatus including at least an electronic zoom circuit including the electronic zoom circuit, A zoom circuit, which outputs image signals of a predetermined line repeatedly within one field period to output image signals of all N lines within one field period, and the solid-state image sensor outputs the image signals. When the image signal is written, the image signals of the same line are not written redundantly and the predetermined horizontal An image signal of a plurality of pixels including at least all pixels in the range is written, and only a line image signal corresponding to the predetermined vertical range is repeatedly read according to the zoom magnification, and an image signal for one line is written. ,
A line memory in which only image signals of pixels corresponding to the predetermined horizontal range are repeatedly read according to the zoom magnification; and an interpolation circuit that interpolates the image signal in horizontal and vertical directions to obtain the enlarged image, Zoom magnification is N /
When it is less than M times (where M <N), the solid-state imaging device repeatedly outputs only the image signal of the line corresponding to the predetermined vertical range within one field period, While the image signal is zoomed in the line memory and then input to the interpolation circuit, when the zoom magnification is N / M or more, the solid-state imaging device includes M lines including at least all lines in the predetermined vertical range. Minute image signals are repeatedly output within one field period, and an electronic zoom circuit that inputs the image signal from the solid-state image sensor to the interpolation circuit after performing a zoom process on the memory and the line memory, Still image capture that stops writing to the memory and repeatedly reads data in the memory when the electronic zoom circuit operates Function, the writing data to the memory is intermittently written, the writing to the memory is stopped, and then the still image capture function at an arbitrary magnification to repeatedly read the data on the memory and the writing to the memory are performed. It is performed for a predetermined screen part, after stopping writing to the memory, it is possible to perform one of the enlarged still image capture functions at any position by repeatedly reading the data in the memory. A camera-integrated recording / reproducing device characterized in that 2) The camera-integrated recording / reproducing apparatus according to claim 1, further comprising a circuit for switching the memory during a reproducing operation to correct the jitter of a reproduced signal, and stopping writing to the memory during a reproducing operation. A playback still image capture function that repeatedly reads out the data on the memory, writes the data to be written to the memory intermittently, stops writing to the memory, and then repeatedly reads the data on the memory By reproducing the still image capture function at a magnification and writing to the memory on a predetermined screen portion, stopping writing to the memory, and then repeatedly reading the data on the memory,
A camera-integrated recording / reproducing device characterized in that any one of the enlarged reproduction still image capture function at any position is performed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A camera-integrated recording / reproducing apparatus of the present invention will be described below with reference to preferred embodiments. Figure 1
4 is a schematic block diagram for explaining a camera-integrated recording / reproducing apparatus having an electronic zoom function according to an embodiment of the present invention, and the same components as those of the conventional electronic zoom circuit shown in FIG. 4 are the same. The code is attached. That is, in the electronic zoom circuit shown in FIG. 1, the structure of the field memory 32 in the conventional electronic zoom circuit is the memory 2 and the switch SW1, and a general C used in the conventional electronic zoom circuit is used.
A solid-state image pickup device 1 (hereinafter referred to as CCD 1) having a vertical zoom mechanism, which is different from the CD 30, is used.

First, the CCD 1 will be described. CC
D1 has a function of outputting only a line signal of a predetermined line in the vertical direction of the screen a plurality of times according to the electronic zoom magnification, based on a control signal input from a CPU or the like (not shown).

FIG. 3 shows an image signal for one field output from the CCD 1. FIG. 3A shows a state in which zoom processing is not performed in the vertical direction of the screen, and FIG. 5C shows a state in which zoom processing has been performed 5 times, and FIG. 7C shows a state in which zoom processing has been performed twice in the vertical direction of the screen. Although the number of lines N in one field is 120 here for the sake of easy understanding, the number of lines in one field need not be 120.

As shown in FIG. 3A, the CCD 1 outputs the image signals from the first line to the 120th line, which correspond to one field, line by line when zoom processing is not performed in the vertical direction of the screen. On the other hand, as shown in (b) and (c), when performing the zoom processing in the screen vertical direction, only the line signal of a predetermined line in the screen vertical direction is repeatedly output according to the zoom magnification.

That is, when performing a zoom process of 1.5 times in the vertical direction of the screen, the image signals from the 21st line to the 100th line are input to 21, 21, 22, 23, 23,
A total of 120 lines are output by repeatedly outputting a part of lines such as 24, ..., 99, 99, 100.

Further, in the case of performing the zoom processing of 2 times in the vertical direction of the screen, the image signals from the 31st line to the 90th line are 31, 31, 32, 32, 33, 33,
.., 89, 89, 90, 90, a part of the lines are repeatedly output twice to output a total of 120 lines.

As described above, although the CCD 1 outputs an image signal of 120 lines in total, the same line is repeatedly output when performing zoom processing of at least 1 times, and therefore, as substantial image signal information. Does not exist for 120 lines. Note that which line of the signal to be repeatedly output is controlled based on a control signal input from a CPU (not shown) or the like according to the magnification of the electronic zoom,
The zoom magnification in the vertical direction of the screen output from CCD 1 is 2
Limited to no more than twice.

The image signal for one field output from the CCD 1 is output line by line after being subjected to predetermined signal processing by the signal processing circuit 31, and the image output from the signal processing circuit 31. The signal is processed differently when the electronic zoom magnification is less than 2 times and when it is 2 times or more.

First, as an example in which the magnification of the electronic zoom is less than 2 times, the case of performing the zoom processing of 1.5 times will be described. At this time, the switch SW1 is connected to the terminal a side and the signal processing circuit. The image signal output from each line 31 is written in the line memory 33. Then, a read address corresponding to the electronic zoom magnification is determined by a CPU (not shown) or the like, and the image signal is read for each pixel based on the read address.

That is, in the case of performing the electronic zoom processing of 1.5 times, the CCD 1 outputs the image signal zoomed by 1.5 times in the vertical direction of the screen as shown in FIG. 3B.
When this image signal is read from the line memory 33, it is zoomed 1.5 times in the horizontal direction of the screen and this signal is input to the interpolation circuit 34.

Next, as a first example when the electronic zoom magnification is 2 times or more, a case where the electronic zoom magnification is 2 times will be described. At this time, the switch SW1 is connected to the terminal B side. Accordingly, only a part of the image signal output from the signal processing circuit 31 for each line is written in the memory 2. Here, the memory 2 has a memory capacity of 1/4 of the field memory 32 shown in FIG.
As shown in FIG. 3C, the image signal output from 1 is zoomed by 2 in the vertical direction of the screen.

The image signal output from the signal processing circuit 31 for each line is written in the memory 2 by a CP (not shown).
Controlled by U or the like, only the image signals of pixels in a predetermined range in the horizontal direction of the screen shown in FIG. 3C are written in the memory 2, and the image signals of the same line shown in FIG. The write address is set so as to be written.

When the image signal is read from the memory 2, the read address is controlled by a CPU (not shown) or the like, the image signal of the same line is repeatedly output twice, and the image signal of the same pixel is output twice. Is output. That is, the image signal from the signal processing circuit 31 is subjected to a zoom process twice in the horizontal and vertical directions at the time of being read from the memory 2. In this way, the image signal output from the memory 2 is written to the line memory 33 after that, and when read from the line memory 33, this signal is input to the interpolation circuit 34 without being zoomed in the horizontal direction of the screen. To be done.

Next, as a second example when the magnification of the electronic zoom is 2 times or more, the case of 4 times will be described. At this time, the switch SW1 is connected to the terminal B side,
Only part of the image signal output from the signal processing circuit 31 for each line is written in the memory 2. CC at this time
An image signal is output from D1 as shown in FIG. 3 (c), which has been subjected to the double zoom processing in the vertical direction of the screen as in the case of performing the double zoom processing.

The image signal output line by line from the signal processing circuit 31 is written in the memory 2 by a CP (not shown).
Controlled by U or the like, only the image signals of pixels in a predetermined range in the horizontal direction of the screen shown in FIG. 3C are written in the memory 2, and the image signals of the same line shown in FIG. The write address is set so that it is overwritten.

When the image signal is read from the memory 2, the read address is controlled by a CPU (not shown) or the like, the image signal of the same line is repeatedly output four times, and the image signal of the same pixel is output twice. Is output. That is, the image signal from the signal processing circuit 31 is subjected to a zoom process in the horizontal direction by a factor of 2 when read from the memory 2, and a zoom process by a factor of 4 in the vertical direction. In this way, the image signal output from the memory 2 is subsequently written in the line memory 33, and when read out from the line memory 33, the image signal is further zoomed by 2 in the horizontal direction of the screen, and this signal is interpolated. Entered in.

The image signal thus obtained is sequentially interpolated by the interpolating circuit 34 to generate an image signal for one field which is interpolated in the horizontal and vertical directions of the screen as shown in FIG. It

As described above, the electronic zoom circuit applied to this embodiment processes different signals when the electronic zoom magnification is less than 2 times and when it is 2 times or more.
When the magnification of the electronic zoom is less than 2 times, the memory 2 is not used, and when the magnification is 2 times or more, the memory 2 is used, but the image signal of the same line output from the CCD 1 must be overwritten and written again. Since the image signal having no data is not written, the recording capacity of the memory 2 can be reduced to 1/4 of the field memory 32.

In the above embodiments, the zoom ratio of the image signal output from the CCD 1 in the vertical direction of the screen is limited to 2 times or less. However, the zoom ratio of the CCD 1 in the vertical direction of the screen is set to 3 times or less. In the case of limiting, different signal processing is performed when the electronic zoom magnification is less than 3 times and when it is 3 times or more. In that case, the recording capacity of the memory 2 is set to the field memory 32. It can be 1/9.

As described above, the maximum value of the zoom magnification of the image signal output from the CCD 1 in the vertical direction of the screen, that is, the number of lines in one field is N, and the minimum controlled so that the CCD 1 outputs in one field period without overlapping. The recording capacity of the memory 2 is changed by changing the value of N / M when the number of limit lines is M.
It can be changed to 2 (M / N2).

When electronic zoom is performed using the memory 2, camera shake correction control is performed when the image signal is read from the memory 2, and autofocus using the image signal written in the memory 2 is performed. It is also possible to control white balance and the like, and it is possible to maintain sufficient accuracy even when an electronic zoom image with a maximum of 10 times or more is obtained.

The operation of performing the electronic zoom using the memory 2 has been described, but during the VCR reproduction operation,
The switch SW2 in FIG. 1 is connected to the terminal D side, and the switch SW3 is connected to the terminal B, respectively. The VCR playback signal 35 is written in the memory 2 with a clock synchronized with the playback signal, and is fixed from the memory 2. The memory 2 is read by a clock and sent to the reproduction output signal processing circuit 36.
It is possible to perform TBC (time axis correction) processing in a state where the recording capacity of is changed to (M / N2) of the field memory 32.

Further, when performing the electronic zoom process using the memory 2, a still image capture process can be performed by stopping the write control of the memory 2 by a CPU or the like (not shown) and repeatedly reading the contents of the same memory 2.

Similarly, a CPU (not shown) controls writing of the memory 2 according to the image magnification set by the user, and at the same time, a read address corresponding to the image magnification set by the user is set by the CPU (not shown). By reading the image signal from the memory 2 based on the read address, it is possible to perform still image capture processing with the image magnification set by the user.

Further, by performing the write control of the memory 2 according to the image range set by the user and reading at the image magnification according to the image range, an enlarged still image capture process of the image range set by the user can be performed.

In the above (0032), the recording capacity of the memory 2 during the VCR reproduction operation is set to the field memory 3
Although it was shown that TBC processing can be performed in the state of changing to (M / N2) of 2, the switch SW2 is connected to the terminal D side, and the switch SW1 is connected to the terminal A side to store the memory. 2 is sent to the reproduction output signal processing circuit 36 via the line memory 33 and the interpolation circuit 34, the recording capacity of the memory 2 is (M / N) of the field memory 32.
TBC processing can be performed in the state changed to 2).

Also, during the VCR playback operation,
The switch SW2 is connected to the terminal D side, the switch SW1 is connected to the terminal B side, and the output of the memory 2 is connected to the line memory 33 and the interpolation 3
The reproduction output signal processing circuit 36 is fed to the reproduction output signal processing circuit 36 via four circuits, the writing control of the memory 2 is stopped by a CPU or the like (not shown), and the content of the same memory 2 is repeatedly read, so that reproduction still image capture processing can be performed.

Similarly, the CPU (not shown) or the like controls the writing of the memory 2 according to the image magnification set by the user, and at the same time, the read address corresponding to the image magnification set by the user is set by the CPU (not shown). By reading an image signal from the memory 2 based on the read address, it is possible to perform a reproduction still image capture process with an image magnification set by the user.

Further, by performing the write control of the memory 2 according to the image range set by the user and reading it at the image magnification according to the image range, the enlarged reproduction still image capture process of the image range set by the user can be performed.

[0040]

As described in detail above, according to the present invention,
By performing different zoom processing when the zoom ratio of the electronic zoom during camera operation is less than N / M times and when the zoom ratio is N / M times or more, the recording capacity of the memory 2 can be made larger than that of the 1-field memory. (M / N2) times, and the recording capacity of the memory 2 is (M / N2) times that of the 1-field memory, the still image capture function, the still image capture function at an arbitrary magnification, Alternatively, it is possible to provide a camera-integrated recording / reproducing apparatus that performs any one of the functions of capturing an enlarged still image at an arbitrary position.

During the reproducing operation, the memory 2 can be switched, and the reproduced signal jitter can be corrected with the recording capacity of the memory 2 being (M / N2) times the recording capacity of the 1-field memory. Is a camera-integrated type that performs one of the playback still image capture function, playback still image capture function at any magnification, or enlarged playback still image capture function at any position while performing the playback signal jitter correction. A recording / reproducing device can be provided.

[0042]

[Brief description of drawings]

FIG. 1 is an electronic zoom circuit applied to an embodiment of the present invention,
It is a figure for demonstrating a TBC circuit and a still image capture circuit at the time of an electronic zoom.

FIG. 2 is an electronic zoom circuit and TBC applied to another embodiment.
FIG. 6 is a diagram for explaining a circuit and a still image capture circuit during reproduction operation.

FIG. 3 is a diagram showing an image signal for one field output from a CCD 1.

FIG. 4 is a diagram for explaining a conventional electronic zoom circuit and TBC circuit.

FIG. 5 is a diagram showing how an image is enlarged when a horizontal / vertical 2 × zoom process is performed.

[Explanation of symbols]

1, 30 ... Solid-state image sensor (CCD) 2 ... memory 31 ... Signal processing circuit 32 ... Field memory 33 ... Line memory 34 ... Interpolation circuit 35 ... Playback signal of VCR 36. Reproduction output signal processing circuit SW1,2,3 ... Switch

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Nishiyama             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. F-term (reference) 5B057 BA11 CD06 CH11 DA16                 5C022 AA11 AB36 AB37                 5C053 FA21 GB40 HC01 KA02 KA03                       LA01                 5C076 AA21 BA03 BA04 BA06 BA08                       BB04

Claims (2)

[Claims] 1. An image signal of a predetermined line is set to 1 when a camera is operated.
A camera integrated type that includes at least a solid-state image sensor that repeatedly outputs within a field period, and an electronic zoom circuit that includes a memory in which only image signals of lines corresponding to the predetermined vertical range are repeatedly read according to the zoom magnification. In the recording / reproducing apparatus, an electronic zoom circuit that obtains a magnified image by enlarging only a predetermined horizontal and vertical range of an image in which one field is formed by N lines when the camera is operating. By repeatedly outputting the image signals of N lines in one field period, and when the image signals output from the solid-state image sensor are written, the image signals of the same line are Image signals of a plurality of pixels that are not written in duplicate and that include at least all pixels in the predetermined horizontal range are An image of pixels corresponding to the predetermined horizontal range, and a memory in which only the image signals of the lines corresponding to the predetermined vertical range are repeatedly read according to the zoom magnification, and the image signal for one line is written. A line memory in which only signals are repeatedly read according to the zoom magnification, an interpolation circuit for interpolating the image signal in the horizontal and vertical directions to obtain the enlarged image, and the zoom magnification is N / M times (where M is M). When <N) is not satisfied, the solid-state imaging device repeatedly outputs only the image signal of the line corresponding to the predetermined vertical range within one field period, and the image signal from the solid-state imaging device is output to the line memory. When the zoom magnification is N / M or more, the solid-state image sensor is operated in the predetermined vertical range. Image signals for M lines including at least all the lines are repeatedly output within one field period, and the image signal from the solid-state imaging device is zoomed by the memory and the line memory and then input to the interpolation circuit. And a still image capture function for stopping the writing to the memory and repeatedly reading the data on the memory when the electronic zoom circuit operates, and writing the writing data to the memory intermittently, After stopping the writing to the memory, the still image capture function at an arbitrary magnification that repeatedly reads the data on the memory, and writing to the memory is performed on the predetermined screen part, and the writing to the memory is performed. After stopping, the data in the memory is repeatedly read to expand at any position. Camera built-in type recording apparatus is characterized in that so as to perform any one of the functions of the still image capture function. 2. The camera-integrated recording / reproducing apparatus according to claim 1, further comprising a circuit for switching the memory at the time of a reproducing operation to correct the jitter of a reproduced signal, and performing a reproducing operation to the memory. Playback still image capture function that stops writing and repeatedly reads data on the memory, intermittently writes data to be written to the memory, stops writing to the memory, and then repeatedly reads data on the memory Playback still image capture function at any magnification, and write to the memory on the specified screen portion, stop writing to the memory, and then repeatedly read the data on the memory A camera that is characterized by being able to perform any one of the enlarged playback still image capture functions Body recording / playback device.