KR20010010506A - Portable digital camcorder with MPEG2 or 4 incoder - Google Patents

Abstract

PURPOSE: A portable digital camcorder building an MPEG2/4 encoder therein is provided to compress digitalized analog-typed moving pictures information by using the MPEG2 or MPEG4 encoder, and to store the compressed moving pictures information in a hard disk or a high capacity of memory, so that a user can easily record data of moving pictures to immediately utilize the data through a computer and can use the data for exchanging information on the internet. CONSTITUTION: A microphone converts a voice signal into an electrical signal. A charge coupled device(CCD) converts an image signal into an electrical signal. A receiver receives stored analog data. An analog to digital converter(ADC) converts an analog signal into a digital signal. A key switch is operated by a user. A micro controller(MCU) controls a camcorder. A digital signal processor(DSP) compresses digital data with an MPEG2 or MPEG4 type. A memory builds control programs of the MCU and the DSP. A hard disk or a high capacity of memory stores the compressed data. A universal serial bus(USB) controller communicates with a computer.

Description

Portable digital camcorder with MPEG2 / 4 encoder {Portable digital camcorder with MPEG2 or 4 incoder}

In general, a camcorder is a compound word of a camera and a recorder, and refers to a portable recorder for recording a moving image including voice. In recent years, the importance of multimedia in all fields has increased, and the importance of moving images is increasing due to the rapid development of computer performance. In addition, as digital technology is incorporated into the camcoder field, camcoder technology is making remarkable progress.

However, Camcorders used to date not only store data in analog form, but also use 8mm tape as a recording medium, making it difficult to exchange data with a computer and making data unavailable on the Internet.

According to the present invention, after digitalizing moving picture information in analog form, it is compressed using an MPEG2 or MPEG4 encoder and stored in a hard disk or a large memory so that a user can easily record the moving picture data and use it directly using a computer. In addition, it provides a digital portable camcorder that can be useful for exchanging information over the Internet.

1 is a block diagram of a camcorder for storing conventional moving picture information.

2 is a diagram showing the use of a case where a portable digital camcoder with a built-in MPEG2 / 4 encoder according to an embodiment of the present invention is applied.

3 is a detailed block diagram of a portable digital camcoder incorporating an MPEG2 / 4 encoder according to an embodiment of the present invention.

4 is a flowchart illustrating a recording and reproducing process of a portable digital camcorder with an MPEG2 / 4 encoder according to an embodiment of the present invention.

1 is a block diagram of a conventional camcorder, an image pickup device 1 for capturing moving images, a microphone 2 for converting voice information into an electrical signal, and an analog-to-digital conversion for converting the information into digital information. A device (Analog-Digital Converter, hereinafter referred to as ADC) (3), a microcontroller (Microcontroller, hereinafter referred to as MCU) that receives and controls their information, and storage of control programs and temporary memory variables therefor. Memory (5), a digital-to-analog converter (DAC) for converting digital data into analog data (6), and a head for finally storing information on an 8mm tape ( 8) and a camcoder having a drive device (Interface or Driver) 7 for driving it. As such, conventional camcorders are not only suitable for digital communication by storing data in analog, but also 8mm tapes used as storage media are not suitable for computers.

Therefore, in the present invention, a portable digital camcorder, which allows a user to easily record data of a moving picture and use it directly using a computer, and also useful for exchanging information through the Internet, includes an image pickup device for capturing moving pictures. , A microphone that converts voice information into an electrical signal, an ADC that converts their information into digital information, an MCU that receives and controls their information, and compresses the digitally converted data into MPEG2 or MPEG4 format. Digital signal processor (DSP) with built-in encoder, memory for storing programs and temporary memory variables for controlling MCU and DSP, hard disk for finally storing information, or Mass data, interface circuits for their control and data communication with a computer So that a communication circuit.

Other objects and features of the present invention in addition to the above objects will become apparent from the following description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 and 3.

2 schematically illustrates a case where a portable digital camcoder incorporating an MPEG2 / 4 encoder according to the present invention is applied and utilized.

By recording or converting the real moving image 10 or the existing stored analog moving image data 11 into digital moving image data in MPEG2 or MPEG4 format using a portable digital camcorder equipped with an MPEG2 / 4 encoder according to the present invention. 13, not only editing and reproducing are possible, but also data transmission through the Internet 14 and further Internet broadcasting are possible.

3 is a detailed block diagram of a portable digital camcoder incorporating an MPEG2 / 4 encoder according to an embodiment of the present invention. The microphone 21 converts a voice signal into an electrical signal and converts an image signal into an electrical signal. A solid-state image pickup device 22 for converting, a receiving unit 23 for receiving data stored as an existing analogue, an ADC 24 for converting an analog signal into a digital signal, and a key switch 25 for a user's operation And an MCU 27 for controlling the camcorder, a DSP 28 for compressing digital data in MPEG2 or MPEG4 format, a memory 26 containing a microcontroller and a DSP control program, and compressed data. A universal serial bus (hereinafter referred to as USB) controller 30 is provided as a communication circuit for communicating with a hard disk or mass memory 29 to be stored and a computer.

In the configuration of FIG. 3, the user manipulates the key switch 25 to digitalize the audio and image signals input to the microphone 21 and the solid state image pickup device 22 through the ADC 24, and then to the MPEG2 or MPEG4 format. Not only can it be compressed and recorded on a hard disk or a large memory 29, but also the information stored through the USB controller 30 can be transmitted to a computer at high speed or through the Internet.

4 is a flowchart illustrating a recording and transmitting process of moving picture information in a portable digital camcorder with an MPEG2 / 4 encoder according to an embodiment of the present invention, which is performed by the microcontroller 27.

In the thirty-first step, the user selects a recording or transmission mode. According to the user's selection, in the thirty-second step, in the thirty-second mode, the ADC 32 is converted to digital data and then the thirty-third step is performed. After transferring the data converted into digital to the DSP is compressed in the format of MPEG2 or MPEG4, and in step 34 the compressed data is stored in a hard disk or a large memory. On the other hand, in the transfer mode, in step 35 the data stored in the hard disk or a large memory is imported, and in step 36, the data is transferred to the computer.

As described above, the portable digital camcorder equipped with the MPEG2 / 4 encoder according to the present invention can modify digital video data by storing the desired video or analog video information in MPEG2 or MPEG4 format in real time or transmitting it to a computer. It is not only useful for editing but also useful for real time internet broadcasting.

As described above, the portable digital camcoder incorporating the MPEG2 / 4 encoder has been described as a preferred embodiment. However, it will be apparent to those skilled in the art that various modifications and changes can be made without departing from the technical spirit of the present invention. will be. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

As described above, the portable digital camcorder equipped with the MPEG2 / 4 encoder according to the present invention can modify digital video data by storing the desired video or analog video information in MPEG2 or MPEG4 format in real time or transmitting it to a computer. It is not only useful for editing but also useful for real time internet broadcasting.

Claims (4)

An image pickup device for converting a moving image into an electrical signal, a microphone for converting an audio signal into an electrical signal, conversion means for converting an analog signal into a digital signal, compression means for compressing digital data into an MPEG2 or MPEG4 format, and controlling them A portable digital camcorder with a built-in MPEG2 / 4 encoder comprising a microcontroller, a storage means for storing data, and a communication means for communicating with a computer. The portable digital camcorder with an MPEG2 / 4 encoder according to claim 1, wherein a hard disk or a large capacity semiconductor memory is used as the data storage means. The portable digital camcorder with MPEG2 / 4 encoder according to claim 1, wherein a DSP having MPEG-2 or MPEG4 encoding software is used as a compression means for compressing the digital data in MPEG2 or MPEG4 format. Wooder. The portable digital camcorder with a built-in MPEG2 / 4 encoder according to claim 1, wherein a USB standard is used as a communication means with said computer.