JP2004096466A - Video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device which can selectively output a video signal of a different system to the outside and display the video signal outputted to the outside with a simple constitution. <P>SOLUTION: A digital video signal which is read out of an optical disk 25 and outputted from an MPEG (moving picture expert group) decoder 29 or a digital video signal generated by converting the digital video signal to a progressive system by an I-P (interlace-progressive) conversion part 30 are selected with a switch 31 and outputted from a video output terminal 19. In this case, the digital video signal outputted from the I-P conversion part 30 is supplied to a liquid crystal display part 13 to display a video on a liquid crystal monitor 23. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video display device for converting an input video signal into a format and displaying the converted video signal, and more particularly to a video display device suitable for use in a portable DVD (Digital Versatile Disk) player having a liquid crystal display unit.
[0002]
[Prior art]
As is well known, a DVD player as described above has a structure in which a liquid crystal display unit having a liquid crystal monitor is connected to a device main body having a disk drive unit for reading and decoding information from a DVD so as to be freely developed. Has become.
[0003]
That is, in this apparatus main body, video information is read from a DVD via an optical pickup, and the read video information is decoded, and then demodulated to obtain a baseband analog video signal.
[0004]
The baseband analog video signal demodulated by the apparatus main body can be taken out of the apparatus main body through an external output terminal, and is supplied to the liquid crystal display section to be displayed on a liquid crystal monitor. Provided for display.
[0005]
By the way, the liquid crystal display unit in the DVD player is designed for a progressive system. In a DVD player, a video system compatible with a progressive system is often connected to an external output terminal.
[0006]
For this reason, the current DVD player is provided with an IP (Interlace-Progressive) conversion unit for converting the interlaced video signal after the decoding process into the progressive video signal.
[0007]
Then, the mode in which the decoded interlaced video signal is directly demodulated and the baseband analog video signal is supplied to an external output, and the decoded interlaced video signal is converted into the progressive video signal by the IP conversion unit. A user can select a mode in which the converted and demodulated baseband analog video signal is supplied to an external output.
[0008]
However, in such current DVD players, the demodulated baseband analog video signal is used as a video signal to be displayed on the liquid crystal display unit in any mode.
[0009]
For this reason, in the liquid crystal display unit, it is necessary to convert the demodulated baseband analog video signal into a digital video signal again, perform IP conversion, and then convert it into a video signal that can be displayed on a liquid crystal monitor.
[0010]
As a result, the circuit scale of the liquid crystal display unit is increased, and an IP conversion unit is required for each of the device main body and the liquid crystal display unit. There is a problem that it is not practical for portable use.
[0011]
Japanese Patent Laid-Open Publication No. Hei 10-117324 discloses a portable information processing apparatus capable of reproducing a DVD for a long time. However, this publication does not disclose anything about solving a configuration problem that arises in handling both an interlaced video signal and a progressive video signal as described above. It is.
[0012]
[Problems to be solved by the invention]
Accordingly, the present invention has been made in view of the above circumstances, and provides a video display device capable of selectively outputting a video signal of a different system to an external device and displaying the externally output video signal with a simple configuration. The purpose is to provide.
[0013]
[Means for Solving the Problems]
A video display device according to the present invention includes: a conversion unit for performing a format conversion process on an input video signal; a switching unit for selectively externally outputting a video signal whose format has been converted by the conversion unit and an input video signal; And a display means for supplying a video signal whose format has been converted in step (1) to perform video display.
[0014]
According to the configuration described above, the video signal that has been format-converted by the conversion unit that performs the format conversion process on the input video signal is supplied to the display unit and provided for video display. Can be selectively output to the outside, and the video signal output to the outside can be displayed with a simple configuration.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the appearance of a portable DVD player 11 provided with a liquid crystal display unit described in this embodiment. The DVD player 11 includes a main body 12 and a liquid crystal display 13 supported by the main body 12.
[0016]
Among these, the apparatus main body 12 is formed in a flat rectangular box shape having a flat upper surface 14. On an upper surface 14 of the apparatus main body 12, a disk housing 15 in which an optical disk such as a DVD (not shown) can be mounted is formed. The disk accommodating portion 15 is covered by a disk cover 16 that can be opened and closed.
[0017]
Various controls 17 are arranged on the upper surface 14 of the apparatus main body 12. Examples of the various controls 17 include a cross cursor key, a power switch, a play key, a stop key, and a key for special reproduction.
[0018]
Further, a video output terminal 19 for outputting a video signal obtained by reproducing the optical disc to an external device in an analog format is provided on one side surface 18 of the apparatus main body 12, and an audio signal obtained by reproducing the optical disc is provided. An audio output terminal 20 for outputting to the outside in an analog format is provided.
[0019]
Here, the liquid crystal display section 13 is supported by the apparatus main body 12 in a freely deployable manner via a support section 21 provided at the rear end of the upper surface 14. The liquid crystal display unit 13 accommodates a progressive type liquid crystal monitor 23 inside a housing 22, and can display a video signal obtained by reproducing an optical disk on the liquid crystal monitor 23.
[0020]
The liquid crystal display unit 13 is rotatable between a closed position where the liquid crystal display unit 13 is tilted so as to cover the upper surface 14 of the apparatus main body 12 and an open position where the liquid crystal display unit 13 stands up so as to expose the upper surface 14. When the display unit 13 is turned to the open position, the display screen of the liquid crystal monitor 23 faces the user.
[0021]
The liquid crystal display section 13 is provided with speakers 24, 24 near the support section 21. The speakers 24, 24 can reproduce audio signals obtained by reproducing the optical disk in a stereo format.
[0022]
FIG. 2 shows details of a signal processing system in the DVD player 11. First, in the apparatus main body 12, the optical disk 25 mounted in the disk storage section 15 is driven to rotate by the disk drive section 26, and the recorded information is read by the optical pickup 26a.
[0023]
The rotation control of the optical disk 25, the feed control of the optical pickup 26a, and the focus and tracking control for the objective lens (not shown) in the disk drive unit 26 are performed by the servo unit 27 that receives an output signal from the optical pickup 16a. ing.
[0024]
Then, the information of the optical disk 25 read by the optical pickup 26a is supplied to the separation unit 28 and separated into a video signal and an audio signal. The video signal is supplied to an MPEG (Moving Picture Experts Group) decoder 29 and is subjected to an MPEG decoding process, and then supplied to an IP conversion unit 30.
[0025]
The IP conversion unit 30 has a function of converting an interlaced video signal output from the MPEG decoder 29 into a progressive video signal and outputting it.
[0026]
The video signal output from the MPEG decoder 29 and the video signal output from the IP conversion unit 30 are selectively supplied to a video processing unit 32 by a switch 31 and demodulated into a baseband analog video signal. Is done.
[0027]
Thereafter, the baseband analog video signal output from the video processing unit 32 is supplied to the video output terminal 19 via the interface unit 33 and extracted to the outside.
[0028]
Therefore, by switching the switch 31, the analog video signal corresponding to the interlaced video signal output from the MPEG decoder 29 and the analog video signal corresponding to the progressive video signal output from the IP conversion unit 30 are output. Signals can be selectively output to the outside.
[0029]
The audio signal separated by the separation unit 28 is supplied to an audio decoder 34, where the audio signal is decoded and demodulated into an analog audio signal by an audio processing unit 35. And then taken out.
[0030]
The above-described series of reproduction operations of the optical disk 25 are controlled by a CPU (Central Processing Unit) 37 as a whole. That is, the CPU 37 performs an operation corresponding to the operation information from the various operators 17 based on the program stored in the storage unit 38 and using the storage unit 38 as a work area. In addition, each part 27, 29 to 36 is controlled.
[0031]
Here, the progressive video signal output from the IP conversion unit 30 is supplied to a liquid crystal control unit 39 in the liquid crystal display unit 13 and converted into an analog video signal in a format that can be displayed on the liquid crystal monitor 23. After that, an image is displayed on the liquid crystal monitor 23.
[0032]
The analog audio signal output from the audio processing unit 35 is amplified by the amplifying unit 40 in the liquid crystal display unit 13 and then reproduced by the speakers 24 described above.
[0033]
According to the above-described embodiment, the progressive video signal output from the IP conversion unit 30 installed in the apparatus main body 12 is guided to the liquid crystal display unit 13 and is used for video display on the liquid crystal monitor 23. Like that.
[0034]
For this reason, as before, the baseband analog video signal that is externally output, that is, demodulated and supplied to the video output terminal 19 is converted into a digital video signal, IP-converted, and then converted to a liquid crystal monitor. This eliminates the need for a process of converting the video signal into a video signal that can be displayed on the display device 23, thereby simplifying the circuit configuration of the liquid crystal display unit 13 and making it suitable for carrying.
[0035]
In addition, when only the image is displayed on the liquid crystal monitor 23 of the liquid crystal display unit 13 and the analog image signal is not externally output, the power supply to the image processing unit 32 and the interface unit 33 can be cut off. It is also possible to save money. For this reason, the operator 17 may be provided with a key capable of selecting whether or not to output an analog video signal to the outside.
[0036]
It should be noted that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the scope of the present invention.
[0037]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a video display device capable of selectively outputting a video signal of a different system to an external device and displaying a video signal output to the external device with a simple configuration. it can.
[Brief description of the drawings]
FIG. 1, showing an embodiment of the present invention, is a perspective view illustrating an appearance of a DVD player.
FIG. 2 is a block diagram showing the details of a signal processing system of the DVD player according to the embodiment;
[Explanation of symbols]
11 DVD player,
12 ... device body,
13 ... Liquid crystal display,
14 ... top surface,
15 Disk storage unit,
16 ... Disc cover,
17 ... Controller,
18 ... one side,
19 ... Video output terminal,
20 ... Audio output terminal,
21 ... Support part,
22 ... housing,
23 ... LCD monitor,
24 ... speaker,
25 ... optical disk,
26 ... Disk drive part,
27 ... Servo unit,
28 ... separation unit,
29 ... MPEG decoder,
30 ... IP converter,
31 ... Switch,
32 ... Video processing unit
33 ... Interface part,
34 ... Audio decoder,
35 ... Sound processing unit,
36 ... Interface part,
37 ... CPU,
38: storage unit,
39 ... LCD control unit,
40 ... Amplifying unit.

Claims (8)

Conversion means for performing a format conversion process on the input video signal;
Switching means for selectively outputting externally the video signal and the input video signal which have been format-converted by the conversion means,
A video display device, comprising: a display unit to which a video signal whose format is converted by the conversion unit is supplied to perform video display. The switching means,
A switch that selectively derives the video signal and the input video signal that have been format-converted by the conversion unit,
2. The video display device according to claim 1, further comprising signal processing means for subjecting the video signal derived by the switch to predetermined signal processing and supplying the processed signal to an external output terminal. An operator for selecting whether to externally output a video signal by the switching unit,
3. The video display device according to claim 2, further comprising control means for interrupting the supply of electric power to said signal processing means in a state where a request for not outputting the video signal externally is provided by said operator. . 2. The video display device according to claim 1, wherein said conversion means converts the format of the interlaced video signal into a progressive video signal. The video display device according to claim 1, wherein the input video signal is generated based on information read from a disk-shaped recording medium. 2. The video display device according to claim 1, wherein said display means includes a liquid crystal monitor. Disk drive means for reading video information recorded thereon from an optical disk,
A decoder for decoding the video information read by the disk drive means to generate a digital video signal;
Conversion means for performing a system conversion process from an interlace system to a progressive system on the digital video signal generated by the decoder;
A switch that selectively derives a digital video signal output from the conversion unit and a digital video signal output from the decoder;
Signal processing means for subjecting the digital video signal derived by this switch to predetermined signal processing and supplying it to a terminal for external output,
A disk reproducing apparatus comprising: a liquid crystal display unit for supplying a video signal whose format has been converted by the conversion unit and displaying a video. An operator for selecting whether to externally output a video signal by the signal processing means,
8. A disk reproducing apparatus according to claim 7, further comprising control means for interrupting the supply of power to said signal processing means in a state where it is requested by the operator not to output the video signal externally. .

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