KR940002417B1 - Camcorder using memory card - Google Patents

Abstract

The camera recorder using a memory card includes a clock generator, first-seventh switches for switching signals, a frame memory for recording or reading out digital data, an analog/digital converter for converting an analog signal into digital, a data compressor for compressing the signal switched by the fourth switch, a memory card for storing a signal switched by the fifth switch, a data restorer for restoring the signal switched by the sixth switch, and a digital/analog converter, thereby allowing a specific image to be used for a special purpose.

Description

Camera Recorder Using Memory Card

1 is a block diagram of a camera recorder according to the prior art.

2 is a block diagram of a camera recorder according to the present invention.

3 is a diagram showing a memory area and a directory area of the memory card card shown in FIG.

* Explanation of symbols for main parts of the drawings

100: imaging unit 101: lens

110,320: Analog / Digital Converter 120: Digital Camera Processor

130,430: Digital / Analog Converter 140: Modulator

150: recording / playback amplifier 160: video head

161: motor driving unit 170: electronic viewfinder driving unit

171: viewfinder 180: western controller

190: Video system controller 200: Camera system controller

210,300: clock generator 220: demodulator

230: video signal processing unit

310,330,350,360,380,400,420: 1st, 2, 3, 4, 5, 6, 7 switching unit

340: frame memory 341: FM control unit

370: data compression unit 390: memory card

391: memory card control unit 410: data restoration unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera recorder using a memory card. In particular, in a camera recorder having a still function, a user may record / reproduce an image using a memory card after converting an arbitrary image out of images continuously photographed by the user into digital data. To a camera recorder.

Conventionally, a conventional camera recorder converts arbitrary images of continuous shot images using digital still functions into digital data and then puts them in these frame memories and displays them. The explanation is as follows. The image input through the lens 101 is captured by the imaging unit 100 and then converted into a digital signal by the analog / digital converter 110. The digital signal converted from the analog / digital converter 110 is input to the digital camera processor 120. The digital camera processor 120 is controlled by the camera system controller 200 to process video signals, gamma correction, and AWB. (Auto White Balance) adjustment and other digital signal processing. The digital signal passed through the digital camera processor 120 is converted into an analog signal by the digital / analog converter 130 and input to the electronic viewfinder driver 170 and the modulator 140, respectively. In this case, the electronic viewfinder driver 170 may input an output signal of the digital / analog converter 130 to the viewfinder 171 to observe the captured image through the viewfinder 171. The modulator 140 modulates the output signal of the digital / analog converter 130 to enable frequency modulation (FM) to record a video tape. The signal modulated by the modulator 140 is amplified by the recording / reproducing amplifier 150 and transmitted to the video head 160. The video head 160 is controlled by the motor driver 161 to record / reproduce the signal. The output signal of the amplifier 150 is recorded on the video tape. That is, the motor driving unit 161 controls the video head 160 under the control of the servo controller 180 to enable recording of the video signal.

Meanwhile, when the user presses the play button of the camera recorder, the servo controller 180 recognizes this and controls the motor driving unit 161 so that the video head 160 reads the video signal recorded in the video tape. The recording / reproducing amplifier 150 amplifies the zero signal read from the video head 160 and inputs it to the demodulator 220. The demodulator 220 demodulates the video signal modulated by the modulator 140. To be input to the video signal processor 230. The video signal processor 230 performs analog video signal processing under the control of the video system controller 190 and then sends the video signal to the video output terminal OUT. The clock generator 210 is controlled by the camera system controller 200 to capture an image unit 100, an analog / digital converter 110, a digital camera card processor 120, a digital / analog converter 130, and a modulator. The MAIN clock is applied to 140. At this time, the camera system controller 200, the video system controller 190, and the servo controller 180 exchange state checks and control signals with each other through a bus. However, such a conventional camera recorder has a problem that a user cannot store a specific image or transmit the specific image to a personal computer (PC) to use for desk top publishing (DTP).

Therefore, in order to solve the above problems, the present invention employs a memory card in a camera recorder having a still function, and selects and records / plays an arbitrary image from a series of photographed images to use a specific image for a specific use such as DTP. It is an object of the present invention to provide a camera recorder using a memory card.

In order to achieve the above object, the present invention provides a camera recorder including an imaging unit, a digital camera processor, a modulation unit, a video system controller, a demodulator and a video signal processing unit, and receives a control signal applied from the video system controller. A clock generator for generating a clock, a first, second, third, fourth, fifth, sixth, seventh switching unit for changing a signal flow according to a control signal selected by the video system controller, the video system controller, and the clock; A frame memory capable of recording or reading digital data in response to a signal of a frequency modulation controller controlled according to each signal output from the generator, and switching in the first switching unit according to a control signal applied from the video system controller An analog / digital converter for converting an analog signal into a digital signal, and the video system A data compression unit for compressing data of the signal switched by the fourth switching unit according to each signal output from the controller and the clock generator, and a signal switched by the fifth switching unit according to a control signal applied from the video system controller A memory card for storing the memory card, a memory card controller for controlling the memory card according to a control signal applied from the video system controller, and a sixth switching according to each control signal output from the video system controller and the clock generator A data restoring unit for restoring data of the signal switched in the unit, and a digital / analog converter for converting the digital signal switched in the second switching unit into an analog signal according to each signal output from the video system controller and the clock generator. Characterized by including.

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

2 is a configuration diagram of a camera recore using a memory card according to the present invention.

Referring to FIG. 2, the clock generator 300 is configured to generate a juckle in response to a control signal applied from the video system controller 190.

The first, second, third, fourth, fifth, sixth, seventh switching units 310, 330, 350, 360, 380, 400, and 420 are configured to change a signal flow according to a control signal selected by the video system controller 190.

The frame memory 340 receives or receives digital data from a frequency modulation (FM) controller 341 according to each signal output from the video system controller 190 and the clock generator 300. It is made to let go.

The analog / digital converter 320 is configured to convert the analog signal switched by the first switching unit 310 into a digital signal according to a control signal applied from the video system controller 190.

The data compression unit 370 is configured to compress the data of the signal switched by the fourth switching unit 360 according to each signal output from the video system controller 190 and the clock generator 300.

The memory card 390 is configured to store a signal switched by the fifth switching unit 380 according to a control signal applied from the video system controller 190.

The memory card controller 391 is configured to control the memory card 390 according to a control signal applied from the video system controller 190.

The data restoring unit 410 is configured to restore data of the signal switched by the sixth switching unit 400 according to each control signal output from the video system controller 190 and the clock generator 300. The digital / analog converter 430 is configured to convert the digital signal switched by the second switching unit 330 into an analog signal according to each signal output from the video system controller 190 and the clock generator 300. .

Hereinafter, the present invention having the configuration as described above will be described in detail. When a user pauses an arbitrary image for which a user wants to record a still picture and presses the still picture recording button, the video system controller 190 controls the first switching unit 310 to demodulate 220. The output signal of the to be input to the analog / digital converter 320. At this time, when the output signal of the demodulator 220 is input to the analog / digital converter 320, the video system controller 190 again controls the first switching unit 310 so that the output signal of the demodulator 220 is analog / Do not input to the digital converter 320. The output signal of the demodulation unit 220, which is converted into digital data by the analog / digital converter 320, is input to the second switching unit 330, and the second switching unit 330 of the video system controller 310 In the still picture recording under control, the output signal of the analog / digital converter 320 is recorded in the frame memory 340. In addition, during the still picture reproduction, the second switching unit 330 switches so that the output signal of the frame memory 340 is input to the digital / analog converter 430. At this time, the FM control unit 341 generates an address read / write clock for writing / reading the frame memory 340.

On the other hand, when the still image is recorded, the third switching unit 350 switches the output data of the frame memory 340 to the fourth switching unit 360 and switches the output signal of the seventh switching unit 420 when the still image is reproduced. It is input to the frame memory 340.

When the user uses the high-definition mode, the fourth switching unit 360 and the fifth switching unit 380 are controlled by the video system controller 190 to output data of the frame memory 340 to the data compression unit 370. The memory card 390 is directly input without passing through. In addition, when the user selects the compression mode, the output data of the frame memory 340 passes through the data compression unit 370 to be input to the memory card 390. At this time, the data extractor 370 records the difference between the DCT (Discrete Cosine Transform) for reducing data by eliminating redundancy of the video signal, or recording the difference between the actual image data value and the value predicted from the already encoded data. An algorithm such as DPCM (Differential Pulse Coded Modulation) that realizes reduction or reduction through subsampling is realized.

The memory card 390 under the control of the memory card control unit 391 plays a role of recording and reproducing image information. The memory card 390 completes the still picture recording in accordance with the address transmitted from the memory card control unit 391 and various control signals.

On the other hand, when the user presses the still image playback button, the video system controller 190 determines the mode of the image to be reproduced by the user in the directory area of the memory card 390.

If the video to be reproduced by the user is a compressed mode, the video system controller 190 controls the sixth switching unit 400 and the seventh switching unit 420 so that the output data of the memory card 390 is the data restoration unit. To be entered at 410.

The data restorer 410 restores the signal compressed by the data compressor 370 to the frame memory 340 after restoring the original signal.

On the other hand, if the video to be reproduced by the user is a high-definition image, the video system controller 190, the memory card 390 is the output data is input directly to the frame memory 340 without passing through the data restore unit 410 It controls the 3, 6, 7 switching unit (350, 400, 420). The signal input to the frame memory 340 is input to the digital / analog converter 430, converted into an analog signal, processed by the video signal processor 230, and output to the video output terminal OUT. In this case, the clock generator 300 provides a main clock necessary for reproducing the image.

3 shows an area A of the memory card 390 and a directory area B which is one of the areas of the memory card 390. The area A of the memory card 390 is a directory area and a FAT ( File Alocation Table) and data area. The directory area B is divided into screen number, information classification, mode information, data information, image data information, character data information, and user area.

In the area A of the memory card 390, the FAT area is an area in which detailed contents of the block in which the file is located are recorded in the data area, and the data area is an area in which image data and character data are recorded.

In the directory area B, the screen number is the number information of the captured image, the information classification is information indicating whether the recorded data is image data or audio data, the mode information indicates the compressed mode selected by the user, and the data information is date and time. Information indicating such data. In addition, the image data information of the directory area (B) is information about the address of the data area where the image data corresponding to the screen number is located, and the character data information is a character for a message recorded by the user in the image corresponding to the screen number. The information on the address of the data area in which the data is located and the user area are areas reserved for additional information to be recorded later.

As described above, the present invention has an advantage that the specific image desired by the user is stored in a memory card so that the specific image can be transferred to a PC and used for DTP.

Claims (1)

In the camera recorder comprising an image pickup unit 100, a digital camera processor 120, a modulator 140, a video system controller 190, a demodulator 220 and a video signal processor 230, the video system controller A clock generator 300 for generating a main clock in response to a control signal applied from 230 and first, second, and third signals capable of changing a signal flow according to the control signal selected by the video system controller 230. 4, 5, 6, 7 switching unit 310, 330, 350, 360, 380, 400, 420, the digital system controller 230 and the clock generator 300 receives the signal of the frequency modulation control unit 341 controlled according to each signal output from the digital data A frame memory 340 capable of recording or reading a signal and an analog signal converted from the analog signal switched by the first switching unit 310 into a digital signal according to a control signal applied from the video system controller 230. The data converter 320 compresses data of the signal switched by the fourth switching unit 360 according to the signals output from the digital converter 320 and the video system controller 230 and the clock generator 300. 370, a memory card 390 storing a signal switched by the fifth switching unit 380 according to a control signal applied from the video system controller 230, and a control applied from the video system controller 230. The sixth switching unit 400 according to each control signal output from the memory card controller 391, the video system controller 230, and the clock generator 300 to control the memory card 390 according to a signal. The digital restore unit 410 restores the data of the signal switched in the digital switching unit, and the digital switch switched by the second switching unit 330 according to each signal output from the video system controller 230 and the clock generator 300. Signal to analog And a digital / analog converter (430) for converting the signal into a camera recorder using a memory card.