KR100247346B1 - Apparatus for storing and reproducing data of pc using video cassette tape recorder - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs:

Digital Camcorder

I. The technical problem the invention is trying to solve:

An apparatus for storing and reproducing personal computer data using a video cassette tape recorder of a digital camcorder is provided.

All. The gist of the solution of the invention:

The present invention relates to a device for storing and reproducing personal computer data using a video cassette tape recorder of a digital camcorder, comprising: a first switch for mode discrimination for a camera and a personal computer; A switch unit including a second switch to form a path to the video cassette tape recorder to the camera or the personal computer according to a user's selection, and to form a transmission or reception path between the video cassette tape recorder and the personal computer; Storing the personal computer data applied through the personal computer, converting and reading the personal computer data based on various control signals for the conversion and the lead clock for the digital camcorder, and applying the data to the video cassette tape recorder. Video car A memory unit for storing the video cassette tape recorder data applied through the tape recorder and applying the video cassette tape recorder data to the personal computer based on various control signals for permutation conversion and a read clock for the personal computer; An interface unit for data communication interface between the digital camcorder and the personal computer through a memory unit, and a level adjusting unit located between the memory unit and the interface unit and adjusting a data level according to a difference in power used between the digital camcorder and the personal computer. Configure.

la. Important uses of the invention:

Digital Camcorder

Description

Personal computer data storage and playback control device using video cassette tape recorder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video recording and playback system, and more particularly, to a personal computer (PC) using a video cassette tape recorder (hereinafter referred to as "VCR") of a digital video camcorder. A device for storing data and playing back through a PC.

The camcorder not only has a function of a general video camera for photographing a subject but also has a function as a video recorder for recording a photographed subject. By using such a camcorder, a user can photograph and record a desired subject, and can also check a photographed subject later. In this case, the user may view the image of the recorded subject again through the view finder. An image that can be viewed through the viewfinder, that is, an image of a recorded object, is generally a color image.

As shown in FIG. 1, the digital camcorder can be broadly divided into a camera unit 2 and a VCR unit 4. The camera unit 2 converts the video signal according to the subject photographing into a digital signal and applies it to the VCR unit 4. The VCR unit 4 including a shuffle unit 6 and the like processes the digital signal as digital video data suitable for recording. Recorded on a tape, which is a recording medium, and playback of digital video data recorded on the tape under playback control. The shuffle unit 6 serves to modulate and demodulate data in accordance with a digital signal.

However, the VCR unit 4 of the digital camcorder has no input path for other signals (for example, PC data) other than the Youngshin signal applied from the camera unit 2. The VCR unit 4 may process the data stored in the recording medium and reproduce the data stored in the recording medium when the input signal is input according to a preset format regardless of whether the input signal is image data or not. Therefore, when PC data comes in in a format preset in the VCR unit 4, the signal can be processed and stored, and the signal stored in the recording medium can be reproduced.

Accordingly, an object of the present invention is to provide an apparatus for storing and reproducing personal computer data using a video cassette tape recorder of a digital camcorder.

Another object of the present invention is to provide a digital camcorder capable of storing and reproducing personal computer data.

In accordance with the above object, the present invention provides a personal computer data storage and reproducing apparatus using a video cassette tape recorder of a digital camcorder, in which a first switch and a personal computer data mode are used to distinguish modes for a camera and a personal computer. And a second switch for classifying a transmission / reception mode of the video cassette tape recorder to a camera or the personal computer according to a user's selection, and a transmission or reception path between the video cassette tape recorder and the personal computer. And a switch unit for storing the personal computer data applied through the personal computer and converting and reading the personal computer data on the basis of various control signals for smooth conversion and lead clocks for the digital camcorder. It is in cassette tape recorder And a memory for storing the video cassette tape recorder data applied through the video cassette tape recorder and applying the video cassette tape recorder data to the personal computer based on various control signals for permutation conversion and a read clock for the personal computer. And an interface unit for data communication interface between the digital camcorder and the personal computer through the memory unit, and between the memory unit and the interface unit, and adjusting data levels according to differences in power used between the digital camcorder and the personal computer. Level adjustment section.

1 is a schematic configuration diagram of a general digital camcorder

2 is a block diagram of a camcorder according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a waveform shifting a level of data performed by the TX / RX level shifters 18 and 30 of FIG. 2.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are denoted by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

2 is a block diagram according to an embodiment of the present invention. In FIG. 2, reference numeral 10 denotes not only image data generated by the camera unit 2 but also files and data stored in the PC 12 in the VCR unit 4, and the data stored in the VCR unit 4 in the reception mode in the PC mode. (Hereinafter referred to as "image and PC data reproduction and storage control device").

Referring to FIG. 2, the image and PC data reproduction and storage control device 10 includes an interface 14, switches 16, 22, 26, 28, memory 24, TX level shifter 18, TX driving buffer 20, RX level shifter 30, and RX. It consists of a driving buffer 32.

Of the switches 16, 22, 26, 28 and 34, switch 28 is a manual switch for the camera and the PC mode. When the user selects the switch 28 toward the 'CAM' end, the VCR unit 4 forms a path with the camera unit 2, and when the user selects the switch 28 toward the 'CAM' end, a path is formed with the PC 12. The switches 16, 22, 26, and 34 except for the switch 28 are manually selected by the user as a switch for distinguishing the transmission / reception mode in the PC mode state (ie, the state in which the switch 28 is selected toward the 'PC' end). Preferably, the switches 16, 22, 26, and 34 are operated to be linked by one manual switch. If the user selects the manual switch of the switches 16, 22, 26, and 28 toward the 'T' end, a path (transmission path) from the PC 12 side to the VCR part 4 is formed, and when the user selects the 'R' side, the VCR part A path (receiving path) from the 4 side to the PC 12 side is formed.

In the image and PC data reproduction and storage control device 10, the memory 24 is used to overcome the difference between the image data processing speed in the VCR unit 4 and the PC data processing speed in the PC 12. The processing speed of the image data is much faster than the PC data processing speed. Then, the scanning method is converted. The scanning method in the VCR section 4 is interlace scanning, whereas the scanning method in PC 12 is progressive scanning. The horizontal synchronization signal HS and the vertical synchronization signal VS are applied to the memory 24, and the lead clock CAM RD CLK for the digital camcorder or the lead clock PC RD for the PC is based on the selection of the switch 34 switched according to the transmission / reception mode in the PC mode. CLK is applied. When the transmission path from the PC 12 side to the VCR unit 4 side is formed, the digital camcorder lead clock CAM RD CLK is applied to the memory 24, and the reception path from the VCR unit 4 side to the PC 12 side is formed. Clock PC RD CLK is applied.

The TX / RX level shifters 18 and 30 shift (adjust) the data level according to the difference in the power supply between the digital camcorder and the PC 12. 3 is a diagram illustrating a waveform shifting the level of data performed by the TX / RX level shifters 18 and 30. PC 12 mainly uses 12 volts as the operating power source, and VCR unit 4 of the digital camcorder mainly uses 5 volts and 3 volts as the operating power source. Therefore, TX level shifter 18 level shifts from ± 12V _PP to 5V _PP , and RX level shifter 30 level shifts from 5V _PP to ± 12V _PP to 5V _PP .

In FIG. 2, the TX / RX driving buffers 20 and 32 perform current amplification so that the signals output from the TX / RX level shifters 18 and 30 are suitable for driving the circuits in the subsequent stages. The interface 14 performs an interface for data communication interface between the VCR unit of the digital camcorder and the personal computer through the memory unit 24.

Hereinafter, an operation according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 and 3.

If the user wants to select the image data generated by the camera unit 2, the switch 28 of the image and PC data playback and storage control device 10 may be selected to the 'CAM' end. Then, the camera unit 2 and the VCR unit 4 is connected to the camera mode. Operation in the camera mode is the same as that of a general digital camcorder.

On the other hand, when the user wants to save the files and data stored in the PC 12 to the VCR unit 4 or to play the files and data stored in the VCR unit 4 on the PC 12, the switch 28 may be selected to the 'PC' end. Then, PC mode is connected to PC 12 and VCR unit 4. If the user selects the switches 16, 26, 22 and 26 in the 'T' side in the PC mode (transmission mode state), a transmission path is formed from the PC 12 side to the VCR side 4 and in the 'R' side ( Receive Mode Status) A reception path is formed from the VCR unit 4 side to the PC 12 side.

First, operations of the image and PC data reproducing and storage device 10 in the transmission mode will be described. In transmit mode, data and files are stored in memory 24 via PC 14 via interface 14, switch 14, TX level shifter 18, TX drive buffer 20, and switch 22. The memory 24 stores the data transmitted from the PC 12 and reads the control signal for progressive-to-interlaced conversion, i.e., the horizontal clock signal HS, the vertical sync signal VS, and a digital clock lead clock CAM for the switch 34. Based on the RD CLK (= 13.5 μsec), the stored data is subjected to a rapid conversion and read, and is applied to the VCR unit 4 through the switches 26 and 28. Accordingly, the shuffle unit 6 of the VCR unit 4 demodulates the input data according to the digital signal and provides the internal circuit unit at the rear stage. As a result, the VCR unit 4 records the data provided from the PC 12 on the recording medium.

Next, when the user wants to play back the files and data stored in the recording medium of the VCR unit 4 on the PC 12 (that is, the reception mode), the operation of the image and PC data playback and storage device 10 will be described. In the reception mode, the data and files recorded on the recording medium of the VCR unit 4 are provided to the shuffle unit 6 of the VCR unit 4 through internal circuits, and the shuffle unit 6 modulates the input data in accordance with the digital signal. The signal output from the shuffle section 6 is stored in the memory 24 via the switch 22. The memory 24 stores the data transmitted from the VCR unit 4 and is applied to the control clock for interlaced-to-progressive conversion, that is, a horizontal read signal HS, a vertical sync signal VS, and a PC lead clock PC applied through the switch 34. According to the RD CLK, the stored data are converted and read orderly and applied to the PC 12 through the switch 26, the RX level shifter 30, the RX drive buffer 32, and the interface 14. Accordingly, the PC 12 can play back data and files recorded in the VCR unit 4 of the digital camcorder.

As described above, since the data of the PC can be recorded and reproduced on the recording medium of the digital camcorder, the recording medium of the digital camcorder can be used as the storage medium of the PC.

In the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the equivalents of the claims and the claims.

As described above, the present invention includes an image and PC data reproducing and controlling apparatus in the digital camcorder, so that the PC data can be stored and reproduced using the video cassette tape recorder of the digital camcorder.

Claims (2)

An apparatus for controlling the storage and playback of personal computer data using a video cassette tape recorder of a digital camcorder, A camera or personal computer for a video cassette tape recorder according to a user's selection, including a first switch for mode division for cameras and a personal computer, and a second switch for mode division of transmission and reception in a personal computer data mode state. A switch unit which forms a path to the channel and forms a transmission or reception path between the video cassette tape recorder and the personal computer; The personal computer data stored through the personal computer is stored, and the data for the personal computer is converted and read based on various control signals for the conversion and the lead clock for the digital camcorder, and applied to the video cassette tape recorder. A memory unit for storing the video cassette tape recorder data applied through the video cassette tape recorder and applying the video cassette tape recorder data to the personal computer based on various control signals for permutation conversion and a read clock for the personal computer; , An interface unit for a data communication interface between the digital camcorder and the personal computer through the memory unit; Located between the memory unit and the interface unit, characterized in that the device comprises a level adjusting unit for adjusting the data level in accordance with the difference in the power supply between the digital camcorder and the personal computer. The apparatus of claim 1, further comprising a driving buffer positioned at a rear end of the level adjusting unit and configured to amplify the current to a degree such that a signal output from the level adjusting unit is suitable for driving the circuits in the rear stage.

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