KR19980079167A - Camcorder with wide angle viewfinder - Google Patents

Abstract

The present invention relates to a camcorder using a wide-angle view finder to enlarge the area appearing in the viewfinder rather than the actual area to be photographed. Shooting in the wide-angle image by inputting position data of the image to be photographed output from the horizontal and vertical zoom means 230 and 260 and the horizontal and vertical zoom means 230 and 260 to output an image signal of a position. Photographing position output means 330 for outputting a photographing position signal for indicating a position, and the photographing position output means 330 to a wide-angle image signal output from the image signal processing means 110, 120, 210, and 220; It consists of encoding means 340 for encoding to overlay the shooting position signal output from the and to display in the view finder 400.

According to the present invention, the area that appears in the viewfinder is larger than the actual area to be photographed so that a person can be photographed at a wide angle that the user is accustomed to. There is an effect to make this happen.

Description

Camcorder with wide angle viewfinder

The present invention relates to a camcorder using a wide-angle view finder, and more particularly, to a camcorder using a wide-angle view finder to enlarge a region appearing in the view finder rather than an actual photographed region.

In general, when zooming in with the camera, use the viewfinder to predetermine the range of the subject. However, the viewfinder's wider angle is narrower than the person's wide angle, which makes it different from what the human eye sees. Therefore, there is a problem in that it is not possible to know exactly where the part currently being photographed actually corresponds to the part.

The present invention for improving the above problems is to provide a camcorder using a view finder for making it possible to shoot while viewing a wide angle that is familiar to a person by making the area appearing in the view finder rather than the area actually photographed.

In order to achieve the above object, a camcorder using the view finder according to the present invention is a video signal processing means for processing a wide-angle image captured at a wide angle through a lens to output a wide-angle image signal, a wide-angle image output from the image signal processing means Displaying the shooting position in the wide-angle image by inputting the horizontal and vertical zoom means for zooming in and outputting the image signal of the position to be photographed, and the position data of the image to be output from the horizontal and vertical zoom means. Photographing position output means for outputting a photographing position signal, and encoding for overlaying a photographing position signal output from the photographing position output means on a wide-angle image signal output from the image signal processing means and displaying it in a viewfinder; And encoding means.

1 is a block diagram of a camcorder using a wide-angle view finder according to the present invention

2 is a detailed configuration diagram of the encoder of FIG.

3 is a view showing a state displayed in the viewfinder;

Explanation of symbols for the main parts of the drawings

100: imaging unit 110: analog signal processing unit

120: A / D conversion unit 200: digital signal processing unit

210: gamma correction unit 220: pre-DSP

230: horizontal zoom unit 240: D / D conversion unit

250: noise canceling unit 260: vertical zoom unit

270: field memory 280: S / N improvement unit

300: microcomputer 310: horizontal coordinate processing unit

320: vertical coordinate processing unit 330: shooting position output unit

340: encoder 400: viewfinder

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the camcorder using the view finder according to the present invention includes an imaging unit 100, an analog signal processing unit 110, an A / D conversion unit 120, a digital signal processing unit 200, and an encoder 340. , The shooting position output unit 330, and the view finder 400.

The imaging unit 100 is composed of R, G, B CCD photoelectric conversion of the light entered through the lens to output as an electrical signal, the analog signal processing unit 110 is an analog output from the imaging unit 100 Amplifying the signal and removing the CCD noise, the A / D converter 120 converts the analog signal output from the analog signal processor 110 into a digital signal.

The digital signal processor 200 includes a gamma correction unit 210, a pre-DSP 220, a horizontal zoom unit 230, a digital / digital (D / D) converter 240, a noise remover 250, and a vertical zoom unit. 260, a field memory 270, and a signal / noise (S / N) improvement unit 280.

Here, the gamma correction unit 210 gamma-corrects the R, G, and B signals output from the A / D converter 210, and the pre-DSP 220 receives the gamma correction unit 210. Various corrections are performed on the output signal, and the luminance signal Y and the color difference signal C are output.

In addition, the horizontal and vertical zooming unit 230 outputs an image signal of a position to be photographed and position data of the image to be photographed by horizontally and vertically zooming a wide-angle image. The horizontal and vertical zoom unit 230 is a horizontal zoom unit 230 and a vertical zoom unit 240. Is done.

Here, the horizontal zoom unit 230 zooms in a horizontal direction the wide-angle image output from the free DSP 230 to output horizontal position data of an image to be captured while outputting an image signal of a position to be photographed, and the vertical zoom unit 260 ) Zooms in the vertical direction on the wide-angle image output from the noise canceling unit 250 and the field memory 270, and outputs the vertical position data of the image to be photographed while outputting an image signal of the position to be photographed.

The D / D converter 240 converts a frequency into an input of an image signal of a photographing position output from the horizontal zoom unit 230 to match a frequency of a CCD system with a recorder frequency, and removes the noise 250. Removes noise of the digital video signal output from the D / D converter 240 and stores the noise in the field memory 270.

The S / N improvement unit 280 improves the S / N ratio by removing noise from the luminance and chrominance signals output from the field memory 270.

Meanwhile, the source coding unit 410 and the channel coding unit 420 perform channel and source coding to record on a tape.

The analog signal processor 110, the A / D converter 110, the gamma corrector 210, and the pre-DSP 220 are image signal processors that process wide-angle images captured at a wide angle through a lens. Wide angle video signals are encoded and output for horizontal and vertical zooming.

The photographing position output unit 330 outputs a photographing position signal for indicating a photographing position within the wide-angle image by inputting position data of an image to be photographed output from the horizontal and vertical zooming units 230 and 260. Synchronization output from the encoder 340 a horizontal shooting position signal for displaying horizontal shooting coordinates in the wide-angle image by inputting the horizontal position data of the image to be output from the horizontal and vertical zooming unit (230, 260) Vertical photographing for displaying vertical photographing coordinates in the wide-angle image by inputting the horizontal coordinate processing unit 310 to output the signal and the vertical position data of the image to be output from the horizontal and vertical zooming units 230 and 260. It is composed of a vertical coordinate processing unit 320 for outputting a position signal in accordance with the synchronization signal output from the encoder 340.

The encoder 340 overlays the photographing position signal output from the photographing position output unit 330 on the wide-angle image signal output from the pre-DSP 220 of the image processing unit and displays it in the view finder 400. By encoding, as shown in FIG. 2, the image processing unit according to the horizontal and vertical synchronization signals output from the synchronization signal generator 341 and the synchronization signal generator 341, which generate horizontal and vertical synchronization signals. An overlay unit 342 that overlays a shooting position signal output from the shooting position output unit 330 on a wide-angle image signal output from the pre DSP 220, and an image signal output from the overlay unit 342. Is configured as an image encoder 343 that encodes for display in the view finder 400.

Here, the photographing position signal has a brightness value of black or white to indicate a photographing position in the wide-angle image.

The microcomputer 300 outputs a control signal for controlling the entire camcorder system.

The operation of the camcorder using the viewfinder according to the present invention configured as described above will be described.

The light entered through the lens is photoelectrically converted by the image pickup unit 100, the amplification and noise are removed from the analog signal processor 110, and then converted into a digital signal by the A / D converter 120 to the digital signal processor 200. Is input to the gamma correction unit 210.

The R, G, and B signals output from the A / D converter 120 are gamma corrected by the gamma correction unit 210 and various corrections, for example, luminance corrections, are performed in the pre-DSP 220, and then a color difference signal is performed. It is outputted as (C) and the luminance signal (C).

Therefore, in the pre-DSP 220, the wide-angle image captured at the wide angle is output as the wide-angle image signal.

As shown in FIG. 3, the wide-angle image signal output as described above is output to the encoder 340 as an image signal of a large area A appearing in the entire view finder 400.

Meanwhile, the wide-angle image signal output from the pre-DSP 220 is input to the horizontal zoom unit 230 and zoomed in the horizontal direction. At this time, the zoomed image signal is output to the D / D converter 240. The position data of the image to be photographed is output to the horizontal coordinate processor 310.

The image signal of the position to be photographed zoomed in the horizontal direction output from the horizontal zoom unit 230 is converted into a frequency after the frequency is converted by the D / D converter 240, and then the noise is removed by the noise remover 250. 270).

The image signal of the position to be photographed output from the field memory 270 is input to the vertical zoom unit 260 and zoomed in the vertical direction. At this time, the zoomed image signal of the position to be photographed is output to the S / N improvement unit 280. The position data of the image to be photographed is output to the vertical coordinate processor 320.

Position data of an image to be photographed output from the horizontal and vertical zoom units 230 and 260 is input to the photographing position output unit 330 and output as a photographing position signal for indicating a photographing position within the wide-angle image. The encoder 340 overlays the photographing position signal output from the photographing position output unit 330 on the wide-angle image signal output from the pre-DSP 220 and encodes it for display in the view finder 400 to display the view. The output is to the finder 400.

At this time, the image displayed through the view finder 400 is shown in the state in which the shooting position (B) is displayed in the wide-angle image (A) of the entire view finder, as shown in FIG. Explain.

The horizontal and vertical position data of the image to be output from the horizontal and vertical zooming units 230 and 260 is input to the horizontal and vertical coordinate processing unit 310, and the pixel data of the horizontal and vertical shooting coordinates B according to the synchronization signal. When is output to the overlay unit 342 as a black or white video signal. In this case, the overlayer 342 overlays a black or white image signal output from the horizontal and vertical coordinate processing units 310 and 320 onto pixels corresponding to the horizontal and vertical coordinates of the image to be photographed among the pixels of the wide-angle image signal. And output to the video encoder 343.

Accordingly, the image encoded and output by the image encoder 343 is in a state in which the image B to be captured is displayed in the wide-angle image A as shown in FIG. 3.

On the other hand, the video signal input to the overlay unit 342 is the video encoder (343) according to the composite video signal, R, G, B signal, or each video signal input as the luminance and color difference signal (Y, C) This can be done. That is, when the input video signal is an R, G, or B signal, the video encoder 343 may be implemented as an NTSC encoder.

In addition, the image signal input to the view finder 400 may be implemented as a still image signal in units of frames, in which case the memory capacity is minimal.

On the other hand, the luminance and chrominance signals (Y, C) of the image (B) to be output from the vertical zoom unit 260 after the noise is removed from the S / N improvement unit 280, the source coding unit 410 and the channel It is coded by the coding unit 420 and then recorded on the tape 430.

As described above, the camcorder using the view finder according to the present invention enlarges an area appearing in the view finder rather than an area to be actually photographed, so that a certain area can be photographed by allowing a user to shoot with a wide angle that is familiar to the user. You can find out if you can see through the viewfinder, making it easy to shoot and have an instant shot.

Claims (4)

Image signal processing means for processing a wide-angle image captured at a wide angle through a lens and outputting a wide-angle image signal; Horizontal and vertical zoom means for horizontally and vertically zooming a wide-angle image output from the image signal processing means and outputting an image signal at a position to be photographed; Photographing position output means for outputting photographing position signals for indicating a photographing position within the wide-angle image by inputting position data of an image to be photographed output from the horizontal and vertical zooming means; And And encoding means for overlaying a wide-angle image signal output from the image signal processing means to overlay the shooting position signal output from the shooting position output means and display the same in a view finder. . The method of claim 1, wherein the photographing position output means A horizontal position output signal based on a synchronous signal output from the encoding means for outputting a horizontal position position signal for displaying a horizontal position coordinate in the wide-angle image by inputting horizontal position data of an image to be output from the horizontal and vertical zoom means A coordinate processor; And Vertical outputting vertical shooting position signal for displaying vertical shooting coordinates in the wide-angle image by inputting vertical position data of the image to be output from the horizontal and vertical zooming means according to a synchronization signal outputted from the encoding means. Camcorder using a viewfinder, characterized in that the coordinate processing unit. The method of claim 1, wherein the encoding means A synchronization signal generator for generating horizontal and vertical synchronization signals; An overlay unit for overlaying a photographing position signal output from the photographing position output means to a wide-angle image signal output from the image processing means in accordance with horizontal and vertical synchronizing signals output from the synchronizing signal generator; And And a video encoder for encoding the video signal output from the overlay unit in order to display the video signal in the viewfinder. The camcorder according to claim 1 or 3, wherein the photographing position signal has a brightness value of black or white to indicate a photographing position within the wide-angle image.