KR20020029024A - Portable Digital Video Disk (DVD) player with LCD - Google Patents

Abstract

PURPOSE: A portable digital video disk player is provided to read data stored in an optical disk such as a DVD, a CD, a CD-R or a CD-RW by installing a laser module at an optical pickup of a conventional MP3-CD player, and to regenerate the read data by using an LCD and a headphone. CONSTITUTION: The device comprises a motor drive(260), an optical pickup(210), a wave processor(220), a digital signal processor(230), an audio DAC(240), an audio output device(250), a headphone connector(310), a video output device(300), a controller(280) and a command input device(290). The motor drive(260) rotates the optical disk at a constant speed. The optical pickup(210) reads analogue data from the driven optical disk. The wave processor(220) converts the analog data into the digital data. The digital signal processor(230) detects a format of the digital data, and separates audio data into video data based on the detected format. The audio DAC(240) modulates the audio data into corresponding analog data. The controller(280), if an optical disk is inserted and a play command is input, controls the rotation of the disk by the motor drive(260), and the adjustment of a focusing and a tracking of the optical pickup(210). The digital signal processor enables an embedded microprocessor to detect the kind of the compression, and decode the compressed data according to the detected compression format.

Description

Portable Digital Video Disk Player with LCD Monitor {Portable Digital Video Disk (DVD) player with LCD}

Most computer software content and multimedia data are available today in the form of compact disks or CDs. Also, with the advent of MP3 data compression technology, MP3 CD players (hereinafter referred to as 'MP3-CDP') that can play audio CD and MP3 data together have appeared. However, the disadvantage of these players is that they are used only as audio data player.

A DVD player is a multimedia device that restores compressed audio and video data using an MPEG-2 video decoder and an audio decoder such as AC3, and outputs it to a television or an AC3 amplifier to realize a home theater. It is used. Today, the DVD player is also manufactured for attaching to a car and for personal use. However, these portable DVDs are large and heavy in size and weight even when the display portion showing the current video is separated or mounted, which is insufficient for portable use. In addition, it has a drawback that it cannot read various types of video or audio compressed data that is produced for DVD and made for CD.

According to the present invention, an optical pickup unit is further equipped with a decoder capable of reading a DVD laser, an amp pack, avi, asf and other video formats so as to read DVD format data into an existing portable MP3-CDP. It also has a digital signal processing unit that reads audio and video compressed data and determines what type of compression is used to separate the audio and video data. The audio is passed through the audio output unit and output to earphones. A color TFT LCD screen can be attached to the body to show the video data passed through the video data decoder on the surface, or a dvi terminal can be built in the player to connect an external LCD screen. Invent it so that you can watch movies and other videos easily.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an external structure for explaining a portable composite digital video disc reproducing apparatus according to the present invention.

FIG. 2 is a block diagram showing an external structure for explaining a portable composite digital video disc reproducing apparatus in which an external monitor can be mounted without the liquid crystal monitor attached to FIG.

Fig. 3 is a block diagram for explaining the digital video disc reproducing apparatus of Fig. 1 according to the present invention.

4 is a block diagram illustrating in detail the interior of the digital signal processor of FIG. 1 according to the present invention; FIG.

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

1 is an external configuration diagram illustrating a portable composite DVD player according to the present invention. As shown, the portable composite DVD apparatus 100 can open and close a lid to insert an optical disc, and reproduced video. LCD monitor 110 inserted into the surface of the player lid so that you can see, the headphone terminal and operation unit 120 that outputs audio and commands to control the player through the earphone and the operation terminal that can directly input the command from the player It consists of 130.

Figure 2 shows a form that can be connected to the liquid crystal monitor 150 to the outside by attaching the dvi terminal 140 to the player without attaching the liquid crystal screen on the lid surface of the player.

3 is a block diagram showing the configuration of an internal circuit system of the portable composite DVD player according to the present invention. As shown, the motor drive unit 260 for rotating the optical disk at a constant speed, the optical pickup device 210 and the optical system 270 for reading analog data from the optical disk driven by the drive system, the digital signal from the optical system Waveform processing unit 220 to process the signal, the digital signal processor 230 to determine the format of the digital signal and to separate the data corresponding to the format into audio data and video data, audio to modulate the audio data into an analog signal DAC 240, an audio output unit 250 for determining audio output, a headphone connection unit 310, a video output unit 300 for determining video output, LCD for outputting video input from the video output unit It is composed of a device, a control unit 280 for managing the entire process and a command input unit 290.

When the optical disc is inserted into the DVD player (FIG. 1) and a playback command is input through the command input unit 290, the controller 280 adjusts the rotation of the optical disc, the focusing and tracking of the optical pickup 210 by the motor driving unit 260. To control. When the read-out analog signal is read by the optical system by the optical pickup 210, it is amplified by the waveform processor 220 and then shaped into a digital signal, and the digital signal processor 230 distinguishes the digital signal into video and audio and processes it. .

Referring to FIG. 4 showing the digital signal processor 230 in detail, a microprocessor 230-1 is built in to find a compression format of a digital signal and decoded according to the type of the compression format. For example, if the digital signal is in an amp pack format, first, find out which amp pack format (Amp pack-1, amp pack-2 or ampeck-4). For example, if the determined amp pack format is amp pack-2, two signals are processed, one of which is a pulse code modulation (PCM) audio signal, decoded by the audio decoder 230-2, stored in the RAM 230-4, and sequentially To the audio DAC 240, and the other is a compressed amppack video data signal, which is decompressed by the video decoder 230-3 and also stored in the RAM 230-4, and then sequentially outputs the video output unit 300. To send).

The signal processed by the digital signal processor 230 is sent to the audio DAC 240, and the audio DAC modulates the decoded digital signal into analog data that can be transmitted from the audio output unit 250 to the output device 310. Done. The device of the present invention allows a headphone or the like to be connected to the output terminal 310.

On the other hand, the compressed amppack video data is decompressed by the video decoder in the digital signal processor 230 and then sent to the video output unit 300 to be output through the LCD monitor of FIG. Other amppack formats (Amppack-1 or Amp-4), video and audio files are also determined by the microprocessor built into the signal processor, decoded, and then passed to the output for output to headphones and LCD monitors.

In the past, the simple audio form of music delivery was the main purpose of portable devices, but in recent years there has been a growing demand for music videos and other videos. The present invention satisfies the desire for audio and video at the same time by providing music video and other video in one player together with music via audio. In addition, as the language learning form, which was delivered only in the form of audio, is also adding video, the portable composite DVD provides a device that can be enjoyed anywhere and any time while carrying various types of multimedia that are increasing. It can meet the needs of various consumers.

Claims (3)

A device having an MP3-CDP shape and capable of reading optical disks such as CD, CD-R, CD-RW and DVD; A waveform processing unit for converting data read out from the optical disk into a reproduction digital signal and outputting the converted digital signal; A digital signal processor that reads the format of the digital signal and separates the audio signal and the video signal according to the format; Headphone reproducing means for processing an audio signal and outputting a reproduced audio signal; And a color liquid crystal monitor (LCD) for outputting video data transmitted through the interface. The portable composite digital video disc reproducing apparatus according to claim 1, wherein a color liquid crystal monitor for video output is attached to the surface of the MP3-CDP cover of various video data formats such as MPEG, avi and asf. The portable composite digital video disc reproducing apparatus according to claim 1, having a dvi terminal as a built-in device for connecting to an external liquid crystal monitor instead of claim 2.