KR0158637B1 - Campact disk camcorder - Google Patents

Abstract

The present invention relates to a digital camcorder having a compact disc (CD) as a storage device for moving picture and audio data. The present invention provides a compact and lightweight apparatus by applying a compact disc as an information recording device of a camcorder. The camcorder has an extended recording length of about 270 minutes and reproduces high definition image quality of Super Vertical and Horizontal Synchronization (S-VHS) method by applying digital signal processing in data recording and data reading. Can be provided.

Description

Camcorder with compact disc

1 is a block diagram of a camcorder having a compact disc according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: Solid state imaging unit 2: First analogue / digital conversion unit

3: preprocessor 4: video processor

5: compact disc pickup portion 6: second digital / analog conversion portion

7: Amplifying unit 8: First digital / analog converting unit

9: second analogue / digital converter 10: lens

11: microphone

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camcorder, a so-called video camera, and more particularly to a digital camcorder having a compact disk (CD) as a storage device for moving picture and audio data.

In general, a camcorder performs a recording function of converting a moving image into an electric signal and storing the same. The camcorder converts the electrically converted moving image signal through a television or other display device, and records the scene being shot by the photographer through the viewfinder. It is a device to make it visible.

In performing the above-described recording operation of the camcorder, the electrically converted moving image signal is recorded on a magnetic tape.

Conventional camcorders that rely on magnetic tape to record moving picture signals are heavy due to the complexity of the recording mechanism and the necessity for many additional devices.

In addition, the 8mm magnetic tape, which is mostly used, can record only up to 120 minutes, and the playback screen is not clear in the case of the conventional vertical and horizontal synchronization (VHS) method.

Accordingly, an object of the present invention is to provide a camcorder using a compact disc as a storage device for moving image and audio data, which is electrically converted.

Another object of the present invention is to provide a camcorder capable of reproducing a sharp image quality of the Super Vertical and Horizontal Synchronization (S-VHS) method level.

The present invention for achieving the above object,

A solid state imaging unit for converting an image incident through the lens into an electrical signal;

A first analog / digital conversion unit for converting the electrical signal of the solid scratch unit into digital data;

A preprocessing unit which receives the digital data of the first analog / digital conversion unit and performs an error correction function;

A second analog / digital converter for converting a voice signal of the microphone into digital data;

The image data of the preprocessor and the audio data of the second analog / digital converter are compressed into a bit stream conforming to MPEG-2 (MPEG-2: Motion Picture Experts Group 2), and then output to the outside so that the compressed data is recorded. A moving picture processing board which decodes compressed audio data and digital data from compressed data conforming to the specification of MPEG 2 during reproduction of the compressed data;

An amplifier for converting the decoded voice data of the video processing board into an analog signal and providing the same to an outside;

A second digital / analog converter for converting the decoded image data of the video processing board into an analog signal and providing the same to an external device;

And a compact disc pickup unit for recording the data compressed by the moving picture processing board onto a recordable compact disc during recording, and exporting the data recorded on the recordable compact disc to the moving picture processing unit.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a block diagram of a camcorder having a compact disc according to an embodiment of the present invention.

As shown in FIG. 1, the camcorder according to the embodiment of the present invention includes: a solid state imaging unit 1 coupled to position the lens 10 at the front end; A first analog / digital converter (2) connected to receive the output signal of the solid state imaging unit (1); A preprocessor (3) connected to receive the output signal of the first analog / digital converter (2); A second analog / digital converter 9 connected to receive the output signal of the microphone 11; A video processor (4) connected to receive the output signal of the preprocessor (3) and the output signal of the second analog / digital converter (9) and having an encoder and a decoder therein; A digital video disc player (51) connected to receive data from an encoder of the moving picture processor (4) and output data to a decoder; A compact disc drive (54) connected to the digital video disc player so as to transfer data in both directions; A second digital / analog converter 6 and an amplifier 7 connected to receive the output data of the video processor 4; And a first digital / analog converter 8 connected to receive the output data of the first analog / digital converter 2 and output it to the viewfinder.

In the configuration of the embodiment of the present invention described above, the digital video disc player 51 and the compact disc drive 52 constitute a compact disc pickup section.

The compact disc inserted into the compact disc drive 52 is capable of recording data.

The output signal of the second digital / analog converter 6 is provided externally as a video output, and the output signal of the amplifier 7 is provided externally as an audio output.

In addition, the output signal of the first digital / analog converter 8 is provided to a display device (not shown) of the viewfinder, whereby the photographer views the scene being shot through the display screen of the viewfinder. Can be.

Next, the operation of the camcorder with the compact disc according to the embodiment of the present invention will be described.

When power is applied and operation starts, an image in front of the camcorder is incident through the lens 10, and voice within a predetermined radius is converted into an electrical signal through the microphone 11. The image incident through the lens 10 is converted into an electrical signal in the solid-state imaging unit 1. The solid-state imaging unit 1 is configured as a normal solid-state imaging device (CCD: Charge Coupled Device).

The output signal of the microphone 11, which is an audio signal, is input to the second analog / digital converter 9 to be converted into digital data, and the converted digital data is sent to the moving picture processor 4.

The output signal of the solid state imaging unit 1 is input to the first analog / digital conversion unit 2 and converted into digital data, and the converted data is preprocessed by the pre-processing unit 3 and the first digital / analog conversion unit 8. Is sent to.

The first digital / analog converter 8 converts the input data into an analog signal and provides it to the display device of the viewfinder.

The preprocessor 3 performs an error correction operation on the input digital data, and checks whether the input digital data is in the format of the image data. The data on which the error correction operation is completed is sent to the video processing unit 4.

In the video processing unit 4 into which the image data of the preprocessing unit 3 and the audio data of the second analog / digital conversion unit 9 are input, coding and decoding of the data are performed.

That is, data is coded at the time of video recording and data is decoded at the time of video playback.

When describing the recording process, coding of data is performed by an encoder of the video processing unit 4, and the input video data and audio data are bit streams conforming to MPEG-2 (MPEG-2: Moving Picture Experts Group 2) standard. Is compressed.

The compressed data in the specification of MPEG2 is sent to the digital video disk player 51, and the compact disk drive 52 is driven by the digital video disk player 51 to record the compressed data on the compact disk.

In the reproducing process, the compact disc drive 52 is driven by the digital video disc player 51, and the data recorded on the compact disc is sent to the moving image processing unit 4. FIG.

In the decoder of the video processing unit 4, the data compressed in the MPEG2 standard sent from the digital video disc player 51 is decoded into normal digital data.

The decoded data is video data and audio data. The video data is sent to the second digital / analog converter 6, and the audio data is sent to the amplifier 7.

The second digital / analog converter 6 converts the input image data into an analog signal and provides the converted signal to the outside as a video output. The amplification unit 7 amplifies the input audio data and then The amplified signal is provided externally as an audio output.

In the operation of the camcorder according to the embodiment of the present invention described above, a recording operation is performed on the digital video disc player 51 and the compact disc drive 52 by the moving picture processor 4, and at the same time, the data being recorded is recorded on the second digital. It can be provided as an external video output and an audio output via the / analog converter 6 and the amplifier 7.

In addition, when only the playback operation is performed alone, the data recorded on the compact disc is passed through the compact disc drive 52, the digital audio disc player 51, and the video processing unit 4 to the second digital / analog converter 6 And amplification section 7 can be provided as a video output and an audio output.

In the above-described embodiment of the present invention, the video processing unit 4 may use a video processing module that is commercially available as an MPEG2 board.

As described above, according to the embodiment of the present invention, a compact and lightweight camcorder can be provided by applying a compact disc as the information recording apparatus of the camcorder.

In addition, since the recording capacity of the compact disc is larger than that of a general magnetic tape, a camcorder having an extended recording amount of approximately 135 to 270 minutes can be provided.

Finally, digital signal processing is applied to data recording and data reading of compact discs, and thus, a camcorder capable of providing high definition image quality of Super Vertical and Horizontal Synchronization (S-VHS) method due to noise reduction can be provided. Can be.

Claims (4)

A solid state imaging unit for converting an image incident through the lens into an electrical signal; A first analog / digital converter for converting the electrical signal of the solid state image pickup unit into digital data; A preprocessing unit which receives the digital data of the first analog / digital conversion unit and performs an error correction function; A second analog / digital converter for converting a voice signal of the microphone into digital data; The image data of the preprocessor and the audio data of the second analog / digital converter are compressed into a bit stream conforming to MPEG-2 (MPEG-2: Motion Picture Experts Group 2), and then output to the outside so that the compressed data is recorded. And a moving picture processing board for decoding digital audio data and video data from compressed data conforming to the player MPEG 2 standard of the compressed data; An amplifier for converting the decoded voice data of the video processing board into an analog signal and providing the same to an outside; A second digital / analog converter for converting the decoded image data of the video processing board into an analog signal and providing the same to an external device; And a compact disc pickup unit for recording the data compressed by the moving picture processing board to a recordable compact disc during recording, and for outputting the data recorded on the recordable compact disc to the moving picture processing unit. camcorder. The display apparatus of claim 1, further comprising: a first connection between the first analog / digital converter and the preprocessor to convert the output data of the first analog / digital converter into an analog signal and to output the analog data to an output device of the viewfinder; A camcorder equipped with a compact disc, characterized in that it further comprises an analog / digital converter. The encoder according to claim 1 or 2, wherein the video processing unit comprises: an encoder for compressing video data of the preprocessing unit and audio data of the second analog / digital conversion unit into a bit stream conforming to the specifications of MPEG2; And a decoder which decodes data recorded on the compact disc of the compact disc pickup unit into normal digital data. 3. The compact disc pickup unit according to claim 1 or 2, wherein the compact disc pickup unit comprises: a compact disc drive for performing data writing to or reading of data recorded on the compact disc; When the data is written to the compact disk, the compact disk drive is driven to transmit the compressed data of the moving picture processor to the compact disk drive, and when the data recorded on the compact disk is read, the compact disk drive is driven to read the compact disk drive. And a digital video disc player for causing data recorded on the disc to be transmitted to said moving picture processor.