KR100297817B1 - Video camera having a digital specification effect function during reproduction - Google Patents

Abstract

end. TECHNICAL FIELD This invention relates to a video camera.

I. An object of the present invention is to provide a video camera capable of processing a special effect of a recorded screen even during a playback operation.

All. SUMMARY OF THE INVENTION A video camera having a luminance signal processing unit and a color signal processing unit, and having a special effect processing function, comprising: a mode for selectively outputting video signals input from a reproduction system and a solid state image pickup device according to a mode switching signal; A switching unit, a converter for digitally converting and outputting a video signal input from the mode switching unit, a decoder for decoding a composite video signal output from the converter and outputting the decoded composite video signal to the luminance signal processor and the color signal processor; And a switching unit for selectively outputting the output of the converter to an input terminal and an output terminal of the decoder, and a controller for generating and outputting a mode switching signal according to a camera mode and a playback mode.

la. Important uses of the invention: can be used in video cameras.

Description

VIDEO CAMERA HAVING A DIGITAL SPECIFICATION EFFECT FUNCTION DURING REPRODUCTION}

The present invention relates to a video camera having a special effect processing function, and more particularly, to a video camera designed to process a special effect of a playback screen.

In general, a video camera is a video and audio signal processing apparatus capable of recording video and audio signals on a provided recording medium and reproducing the recorded signals. That is, the video camera not only has the functions of a general camera but also has a function of a recorder capable of recording a photographed subject. By using such a video camera, a user can photograph and record a desired subject, and can play back and check a photographed subject.

A typical video camera is equipped with a digital specification effect (DSE) function, which is a special effect processing function. The DSE function includes a mosaic (MOSAIC) processing function, an ART function, a SEPIA function, a B / W (Black / White) function, and the like. These various special effect processing functions are implemented by the user's selection when shooting.

FIG. 1 illustrates a block diagram of a peripheral digital signal processor (DSP IC) including a luminance signal processor 30 and a color signal processor 50 in a general video camera. Referring to FIG. 1, an image signal captured by a lens unit, that is, a camera input signal is converted into digital data by an analog-to-digital converter (ADC) 10 and then the luminance signal processing unit 30 and the color signal processing unit (DSP) in the DSP. 50). As described above, the digital data input to the luminance signal processor 30 and the color signal processor 50 is input to the digital-to-analog converter (DAC) 40, 60 through a series of luminance signal processing and color signal processing. Thereafter, the signal is converted into an analog form luminance signal Y and a color signal C and output.

However, the video signal or the line input signal reproduced from the reproduction and the line input system 20 is directly input to the DAC 40, 60 without going through the luminance signal processor 30 and the color signal processor 50, and then has an analog luminance. The signal Y and the color signal C are converted and output. That is, in the general video camera, the playback signal or the line input signal does not pass through the luminance signal processing unit 30 and the color signal processing unit 50, so that the special effect processing function cannot be expected during the reproduction operation. This is cumbersome in the operation of the video camera because it is necessary to shoot the subject after selecting the special effects function when shooting a video camera.

Accordingly, an object of the present invention is to provide a video camera capable of processing a special effect of a recorded screen even during a playback operation.

It is still another object of the present invention to provide a video camera that can provide convenience of video camera operation during shooting by processing a playback screen with a special effect.

The present invention for achieving the above object is a video camera having a luminance signal processing unit and a color signal processing unit having a special effect processing function,

A mode switching unit for selectively outputting a video signal input from each of the reproducing system and the solid state image pickup device according to the mode switching signal;

A converter for digitally converting and outputting an image signal input from the mode switching unit;

A decoder for decoding the composite video signal output from the converter and outputting the composite video signal to the luminance signal processor and the color signal processor;

A switching unit for selectively outputting the output of the converter to an input terminal and an output terminal of the decoder according to the mode switching signal;

And a controller for generating and outputting a mode switching signal according to the camera mode and the playback mode.

1 is a peripheral block diagram of a digital signal processor including a luminance signal processor and a color signal processor in a general video camera.

Fig. 2 is a block diagram showing the peripheral block structure of the digital signal processing unit required to have a special effect processing function during a reproduction operation according to an embodiment of the present invention.

Hereinafter, an operation according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating a peripheral block diagram of the digital signal processing unit 100 required to have a special effect processing function during a reproduction operation according to an embodiment of the present invention. Referring to FIG. 2, the CCD 70 expands and contracts through a lens unit (not shown) to convert an optical signal of an input object into horizontal and vertical imaging driving pulses generated by a timing generator (not shown). The video signal is converted into the captured video signal for one field. The mode switching unit 74 in the correlation sampling and gain control unit (CDS / AGC) IC receives the signal output from the CCD 70 or the regeneration and line input system 72 according to the mode switching signal input from the microcomputer 88. The switch is output to the ADC 76. The ADC 76 converts the video signal output from the mode switching unit 74 into a digital signal and outputs the digital signal. The switching section 77 in the DSP IC 100 is connected to the VTR stage or the camera CAM stage by switching switching according to the mode switching signal input from the microcomputer 88. The decoder 78 connected to the VTR stage decodes the composite video signal inputted from the reproduction and line input system 72 and outputs the video signal and the audio signal separately. The 2H delay 80 composed of a line memory delays the digital image data input through the decoder 78 or the camera CAM to generate and output (0H + 2H) / 2, 1H signals, and outputs a luminance signal processor. 82 and the color signal processing unit 84 encode and process the digitized video signal for one field into a luminance signal Y and a color signal C in NTSC or PAL format. The luminance signal Y and the color signal C thus output are converted into analog signals by the DAC 86 and output.

On the other hand, the microcomputer 88 includes a memory including a ROM in which a control program according to an embodiment of the present invention is stored and a RAM for temporarily storing data generated during a control operation. Overall control. For example, the microcomputer 88 generates and outputs a mode switching signal according to the function key for processing the special effects during the playback operation from the key input unit 94, thereby specifying the path of the playback signal. The zoom IC 90 performs a special effect on the signals input from the luminance signal processor 82 and the color signal processor 84 under the control of the microcomputer 88 and outputs them. The key input unit 94 includes a plurality of function keys for selecting an operation mode of a video camera, and has a function key necessary for implementing the present invention, that is, a function key for processing a special effect during a playback operation. In this way, the key input unit 94 having a plurality of function keys generates and outputs key data according to a function key press or function key selection.

Hereinafter, an operation of a video camera having a special effect processing function in a playback operation according to an embodiment of the present invention will be described with reference to FIG. 2.

First, assuming that a user captures and records a desired subject through a video camera, and then plays back recorded video information, the microcomputer 88 plays back and line inputs in response to a playback command input from the key input unit 94. FIG. A mode switching signal is output so that video information reproduced from the system 72 can be input into the DSP IC 100. The mode switching signal output in this way is applied to the mode switching unit 74 and the switching unit 77, so that the image information output from the reproduction and line input system 72 is input to the ADC 76, and the ADC ( The digital data output from 76 is input to the decoder 78 through the VTR stage. Therefore, the image information reproduced and reproduced by the line input system 72 is converted into digital data by the ADC 76 and then input to the decoder 78, and the decoder 78 decodes the composite image signal that has been digitally converted to the image signal. Separated and output as audio signal. The separated video signal is then input to the 2H delay 80 to generate (0H + 2H) / 2 and 1H signals, and the (0H + 2H) / 2 and 1H signals generated as described above are known luminance signal processing units. 82 and the color signal processing unit 84, and finally output as the luminance signal (Y) and the color signal (C).

If the user presses a function key for processing the special effects of the playback screen, the microcomputer 88 controls the zoom IC 90 and the memory 92 in response to the control from the luminance signal processor 82 and the color signal processor 84. The input signal is processed by special effects and output. Therefore, it is possible to implement a special effect function that can be implemented only when shooting.

As described above, the present invention has the advantage of providing convenience of video camera operation during shooting because the special effect function that can be implemented only during shooting can be implemented even during playback.

Claims (1)

In the video camera having a luminance signal processing unit and a color signal processing unit and having a special effect processing function, A mode switching unit for selectively outputting a video signal input from each of the reproducing system and the solid state image pickup device according to the mode switching signal; A converter for digitally converting and outputting an image signal input from the mode switching unit; A decoder for decoding the composite video signal output from the converter and outputting the composite video signal to the luminance signal processor and the color signal processor; A switching unit for selectively outputting the output of the converter to an input terminal and an output terminal of the decoder according to the mode switching signal; Control unit for generating and outputting the mode switching signal according to the camera mode and playback mode, And the switching unit and the decoder are implemented as one-chip ICs together with the luminance signal processing unit and the color signal processing unit.