KR970002678B1 - Osd device of laser disc player - Google Patents

Abstract

OSD(On Screen Display) unit of laser disk player includes the microcomputer (54) which controls and outputs OSD, graphic signal and CD signal, the CD graphic/OSD changing part(48) which changes the graphic data from CD signal processing part(44) and the OSD, graphic data from microcomputer (54) by the control of microcomputer(54), the CD graphic signal processing part(50) which deciphers the data from CD graphic/OSD changing part(48) and outputs R, G, B color signal and brightness signal selector(YS) signal, the encoder part(52) which replays and outputs the R, G, B color signal to complex video signal, and the video changing part(58) which changes complex video signal by coupling the CD signal from microcomputer(54) with the brightness signal selector(YS) signal from encoder part(54).

Description

OSD device of laser disc player

1 is a block diagram schematically showing an OSD apparatus of a conventional laser disk player.

2 is a block diagram schematically showing an OSD apparatus of a laser disc player according to the present invention.

* Explanation of symbols for main parts of the drawings

10,40: optical pickup section 12,42: video signal processing section

14,44: CD signal processor 16, 50: CD graphic decoder

18,52: encoder 20,58: video switching unit

22: OSD 24, 26: voice signal processing unit

26,54: Micom 48: CD graphic / OSD switch

56: NOR gate

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-screen display (OSD) device of a laser disk player (LDP), and more particularly, to an OSD device of a laser disk player that implements economical OSD.

FIG. 1 is a block diagram showing an embodiment of an OSD apparatus of a conventional laser disk player. The optical pickup unit 10 converts an optical signal reflected from the disk into an electrical signal and outputs a reproduced RF signal. A video signal processor 12 for reproducing and outputting a video signal (laser disk: LD) by receiving a signal; and a CD signal processor (14) for reproducing and outputting a digital audio signal (compect disk: CD) upon receiving a reproduction RF signal. And processing audio data excluding the subcode data of the CD graphics decoder 16 and the CD signal processor 14, which reads out subcode data, which are graphic data, and generates R, G, and B color signals. Audio signal processing unit 24 for outputting a composite video signal by synthesizing the R, G, and B color signals, and a composite output from the image processing unit 12 under the control of the microcomputer 26. Video signal (Laser Desk: LD) and encoder The video switching unit 20 for selecting and outputting the composite video signal output from the unit 18 and the composite video signal switched and output from the video switching unit 20 and the OSD output by the control of the microcomputer 26. The OSD unit 22 for mixing the data and outputting the ODSD composite image signal, and controlling the image signal LD and CD switching to the image switching unit 20 and outputting the OSD data to the OSD device 22 It consists of the microcomputer 26 to control.

In the prior art configured as described above, first, the optical pickup unit 10 applies the reproduced RF signal reflected by the disk and photoelectrically converted to the image signal processing unit 12 and the CD signal processing unit 14.

Next, when the image signal processing unit 12 receives the reproduction RF signal from the optical pickup unit 10, the image signal processing unit 12 reproduces the composite image signal (Laser Disk: LD) and applies the image signal to the image switching unit 20. 14) When the reproduction RF signal is received from the optical pickup unit 10, the digital audio signal (Compect Disk: CD) is reproduced and applied to the CD graphic decoder unit 16 and the audio signal processing unit 24. The CD signal, which is a digital audio signal, is composed of audio data and graphic data, and the graphic data is called subcode data. Therefore, the CD signal of the CD signal processor 14 includes both audio data having an audio signal and video data having a video signal.

Subsequently, the CD graphics decoder 16 receives the subcode data generated from the CD signal processor 14 to read and generate R, G, and B color signals, and the audio signal processor 24 is the CD signal processor 14. It receives pure digital voice data, not subcode signals, from and outputs the voice.

Meanwhile, the encoder unit 18 synthesizes the R, G, and B color signals applied from the CD graphic decoder unit 16 to produce a composite image signal, and then applies it to the image switching unit 20.

The video switching unit 20 switches the composite video signal LD output from the video signal processing unit 12 and the composite video signal output from the encoder 18 under the control of the microcomputer 26. The image signal thus switched is applied to the OS unit 22.

On the other hand, the microcomputer 26 controls the switching of the video signals LD and CD to the video switching unit 20 and the output of the OSD data to the OS device 22.

The OSD device 22 outputs a composite video signal composed of the OSD by synthesizing the composite video signal output from the image switching unit 20 and the OSD output from the microcomputer 26.

However, in the conventional art, when the OSD is implemented at a desired time, the CD graphic decoder unit 16, the encoder unit 18, and the OSD having the character addition function (OSD (on screen display) (OSD)) are performed. The use of the redundant portion 22 is complicated, and the circuit becomes bulky, which increases the cost and reduces the weight of the device.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object thereof is to provide an economical OSD device of a laser disc player by simplifying an OSD implementation circuit.

In order to achieve the above object, the present invention includes an image signal processing unit for reproducing an image signal based on the reproduction RF signal photoelectric conversion in the optical pickup device; A CD signal processing unit for reproducing an audio signal on the basis of a reproduction RF signal photoelectrically converted by the optical pickup apparatus, wherein the audio signal includes voice data and graphic data; An OSD apparatus of a laser disk player constituting an audio signal processing unit for outputting audio data from the CD signal processing unit, comprising: a microcomputer for controlling and outputting an OSD, a graphic signal, and a CD signal; A CD graphics / OSD switching unit for switching the graphic data from the CD signal processing unit, the OSD and graphic data from the microcomputer under the control of the microcomputer; A CD graphics signal processor for reading out the data from the CD graphics / OS switch and outputting R, G, B color signals and luminance signal selector signals; An encoder unit for reproducing and outputting R, G, and B color signals from the CD graphic signal processor as a composite video signal; The composite video signal is received from the video signal processor and the composite video signal from the encoder based on a combination of the CD signal from the microcomputer and the luminance signal selector signal from the encoder. It provides an OSD device of the laser disk player consisting of an image switching unit for switching the.

Hereinafter, described in detail by the accompanying drawings an embodiment of the present invention as follows.

Referring to FIG. 2, FIG. 2 is a block diagram schematically showing an OSD apparatus of the laser disk player of the present invention, which includes an optical pickup unit 40 for outputting a reproduction RF signal photoelectrically converted from a disk, and a reproduction RF. A CD signal processor 44 for reproducing a digital voice signal (CD) by receiving a signal and outputting voice data and graphic data, a voice signal processor 46 for outputting only voice data and not a sub code signal of the graphic data; CD graphic / OSD switching unit 48 for switching graphic data from CD signal processing unit 44, OSD and graphic data in microcomputer 54, and CD graphic / OSD switching unit 48 are selected. CD graphics decoder 50 for reading the output data to produce R, G, B color signals, encoder 52 for converting R, G, B color signals into composite video signals, and CD graphics / OSD sections. The affected part 48 is controlled and the NOR gate 5 6) and the composite video signal generated by the video signal processor 42 and the composite video signal generated by the encoder 52 are applied to the signal output from the NOR gate 56. Accordingly, the image switching unit 58 is configured to switch and select the final composite video signal.

According to the present invention configured as described above, first, the optical pickup device 40 converts the optical signal reflected from the disk into an electrical signal, outputs the reproduced RF signal, and applies it to the image signal processor 42 and the CD signal processor 44. .

Next, the image signal processor 42 receives the reproduction RF signal from the optical pickup unit 40 to reproduce and output the composite image signal, and the reproduced composite image signal is applied to the image switching unit 58.

The CD signal processor 44 receives the reproduction RF signal from the optical pickup unit 40 to reproduce the digital audio signal. The reproduced digital audio signal has the audio signal and the video signal having the audio data as described above. Contains both graphical data. In addition, the sub code, which is graphic data in the CD signal processor 44, is applied to the CD graphics / OSD switching unit 48, and a voice signal having audio data is applied to the voice signal processor 46. FIG.

On the other hand, the CD graphics / OS switching unit 48 is a circuit for switching the graphics data output from the CD signal processing section 44 and the OSD and graphics data made to meet the code standard output from the microcomputer 54, If the mode controlled by the microcomputer 54 is the CD graphics mode, the graphic data output from the CD signal processor 44 is selected. However, if the mode controlled by the microcomputer 54 is not the CD graphics mode, the OS and graphic data output from the microcomputer 54 are selected. On the other hand, the data switched and selected by the CD graphics / OSD switching unit 48 are input to the CD graphics decoder unit 50.

The CD graphics decoder 50 is a circuit for reading data output from the CD graphics / OSD switching unit 48 to generate R, G, B color signals and luminance signal selector (Y Selector: YS). The G, B color signals are applied to the encoder 52 and the luminance signal selector YS is applied to the NOR gate 56. On the other hand, the luminance signal selector output from the CD graphics decoder 50 outputs H (high) for pixels with video signals and L (low) for pixels without video signals in CD graphics signal processing. to be. That is, H (high) is outputted in the pixel having the CD graphic signal or the OSD character signal, and L (low) is outputted at the pixel having the CD graphic signal or the OSD character signal. On the other hand, the luminance signal selector output from the CD graphics decoder unit 50 is applied to the NOR-gate 56. The encoder unit 52 receives the R, G, and B color signals from the CD graphic decoder unit 50 to generate a composite image signal, and apply the composite image signal to the image switching unit 58.

The microcomputer 54 applies the OSD and the graphic data conforming to the sub code standard to the CD graphic / OSD switching unit 48 according to the CD graphic mode control. That is, the OSD and the graphic data of the microcomputer 54 are applied to the CD graphic / OSD switching unit 48 unless the CD graphics mode is used. In addition, the microcomputer 54 applies the CD signal to the NOR gate 56 so that the image switching unit 58 switches the image output.

The image switching unit 58 receives the composite image signal output from the image signal processing unit 42 and the composite image signal output from the encoder unit 52 and according to the output result of the NOR-gate 56. Is outputted by switching, and the switching operation is shown in Table 1 below. Table 1 below is a diagram for switching the video signal by combining the CD signal of the microcomputer 54 and the luminance signal selector YS signal of the CD-graphic decoder unit 50.

Table 1. Judgment Output Truth Table

H: When there is a CD graphic signal and OSD signal

L: When there is no CD graphic signal or OS signal

CD signal output:

H: CD mode

L: When not in CD mode

Output of NOR gate 56:

H: Select and output the composite video signal of the video signal processor 42

L: Select and output the composite video signal of encoder 52

The image switching operation in the image switching unit 58 is as follows. First, when the signal controlled by the microcomputer 54 is in the CD mode, that is, when the CD signal output is H (high), the output of the NOR gate 56 is L (low), so that the image switching unit 58 is the encoder. The composite video signal applied from the unit 52 is finally output.

When not in the CD mode, switching is performed according to the luminance signal selector YS. When the output of the luminance signal selector YS is H (high), the image switching unit 58 is applied from the encoder unit 52. When the composite image signal is output and the output of the luminance signal selector YS is L (low), the image switching unit 58 finally outputs the composite image signal applied from the image signal processor 42.

As described above, according to the present invention, the OSD of the laser disc player can be executed by using the CD-graphic decoder unit 50 and the encoder unit 52, thereby eliminating the need to double-use the OSD apparatus, thereby reducing the cost. . In addition, since the CD-graphic decoder unit 50 and the encoder unit 50 capable of graphic processing are used as the OSD device, not only characters but also graphics can be easily processed.

Claims (1)

An image signal processor 42 for reproducing an image signal on the basis of a reproduction RF signal photoelectrically converted in the optical pickup apparatus; A CD signal processor 44 for reproducing an audio signal based on the reproduction RF signal photoelectrically converted in the optical pickup apparatus, wherein the audio signal includes voice data and graphic data; In the on-screen display (OSD) apparatus of a laser disk player constituting a voice signal processor 46 for outputting voice data from the CD (compect disk) signal processor 44, A microcomputer 54 for controlling and outputting OSD and graphic signals and CD signals; Under the control of the microcomputer 54, the CD graphics / OSD switching unit 48 for switching the graphic data from the CD signal processing section 44 and the OSD and graphic data from the microcomputer 54; ; A CD graphics signal processor (50) for reading the data from the CD graphics / OS switch (48) and outputting R, G, B color signals and luminance signal selector (Y Selector) signals; An encoder unit 52 for reproducing and outputting R, G, and B color signals of the department as a composite video signal to the CD graphic signal processor; On the basis of the combination of the CD signal from the microcomputer 54 and the luminance signal selector YS signal from the encoder 52, the composite video signal from the video signal processor 42 and the encoder An OSD apparatus of a laser disc player, comprising an image switching unit (58) for receiving a composite video signal from the unit (52) and switching the composite video signal.