JPH0946645A - Image reproducing device and its image data processing circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the image reproduction device in which irregularities of image pattern is not generated at exchange of a disk. SOLUTION: The image reproduction device applies reproduction processing to image data recorded on a disk. A register 11 stores data to fix a color of a screen into a blue color. A reproduction signal is stored in an image memory 9 via a sub code data processing circuit 4, a command decoding circuit 5, a graphic plotting control circuit 6 from an input terminal 3. A display control section outputs blue back data from the register 11 and one of image data from the memory 9 and when a sensor 19 senses unloaded disk, the control section is controlled to output blue back data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reproducing device for reproducing image data recorded on a disc.

[0002]

2. Description of the Related Art At present, there are CD-G system, video CD system, DVD system and the like as a system for digitally recording image data on a disc. The CD-G system has the same recording format as the CD-DA and records image data in the 6-bit portion from R to W of the subcode.
The video CD system uses MPEG1 for audio and image data.
In the DVD, the image data is compressed and recorded in MPEG2.

A conventional player for reproducing image data recorded on these discs not only resets the entire circuit when the main power is turned on, but also resets the entire circuit when the disc is unloaded. I was doing.

[0004]

Since this reset is a so-called system reset, the video system for outputting the image data and the synchronizing signal is also reset. Therefore, normal image data and synchronization signals are not supplied to the RGB encoder that converts the digital RGB television signal from this video system, and a random signal is output from this RGB encoder, which causes noise and image distortion on the screen. Etc. occur.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an image reproducing apparatus and an image data processing circuit thereof for fixing the entire screen to a specific color when a disc is exchanged. To do.

[0006]

In order to achieve the above object, according to the present invention, in an image reproducing apparatus for reproducing image data recorded on a disc, predetermined color data for fixing a screen to a predetermined color. Storage means for storing; a selection means for outputting one of the predetermined color data and the reproduced image data from the storage means; a detection means for detecting the unloading of the disk; and an unloading of the disk from the detection means. Control means for controlling the selecting means so as to output the predetermined color data when a signal is output.

Further, the image data processing circuit of the present invention includes a write / read control circuit for storing and reading the image data reproduced from the disc in the memory according to the command signal also reproduced from the disc; and a television screen. Storage means for storing predetermined color data for fixing the color of the image to a predetermined color; selection means for outputting one of the predetermined color data of the storage means and the image data read from the image memory; A reset circuit for resetting the write / read control circuit and the selecting means when receiving the signal, and for outputting the reset signal for causing the selecting means to output the predetermined color data from the storing means when receiving the unloading signal of the disk. It has and.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 101 is a CD-
Reference numeral 18 denotes a G type disc, and 18 denotes a main power switch of the player 100. Reference numeral 19 is a sensor for detecting loading / unloading of the disc. The sensor 19 may be configured by a photo interrupter or the like, or may be configured by a switch that mechanically detects.

Reference numeral 102 denotes an optical pickup, and the recording information read by the optical pickup 102 is reproduced by the reproducing circuit 1.
The audio processing circuit 104 and the video processing circuit 105 perform reproduction processing in step 03. The audio signal finally drives the speaker, and the image signal is the monitor T
It is supplied to V107. It is also possible to add both the audio signal and the video signal to the monitor TV 107.

FIG. 2 shows a CD in the video processing circuit 105.
-Details of the G decoder 1 are shown. This CD-G decoder 1 is formed by a one-chip IC. Of the data from the reproduction circuit 103 of the video disc player,
Subcode data is input to the decoder 1 from the input terminal 3. This subcode data is processed by the subcode data processing circuit 4.

The command decoding circuit 5 decodes the command from the output of the subcode data processing circuit 4. The decoded image data passes through the graphic drawing control circuit 6 and the read / write control circuit 7 of the video RAM (VRAM) 9.
And written to the external VRAM 9 via the interface 8.

Therefore, when this read command is input, the image data is read from the VRAM 9 and given to the display control unit 10 via the interface 8 and the read / write control circuit 7. The data read from the VRAM 9 is performed in units of one field, for example.

The display controller 10 outputs digital R, G, B signals based on the image data, and also outputs a horizontal synchronizing signal H and a vertical synchronizing signal V. These signals are sent to the RGB encoder 15 through the output terminals 12 and 13. It should be noted that a clock 4f that is four times the chroma carrier fsc
sc is externally given to the display control unit 10 via the terminal 14. The RGB encoder 15 outputs an analog video signal.

The display control section 10 has a built-in switching circuit for selecting the blue back data stored in the register 11 and the image data from the VRAM 9, and the switching is performed based on the command signal from the command decoding circuit 5. Be done. That is, the display control unit 10 selects the image data from the VRAM 9 in the normal reproduction, and selects the blue back data in the register 11 when the command decoding circuit 5 is reset. When the blue back data is selected, only blue (B) is output from the display control unit 10.

The decoder 1 also contains a reset circuit 20 connected to the terminals 16 and 17. A signal based on ON / OFF of the main power switch 18 is externally applied to the terminal 16, and an output of a sensor 19 for detecting loading / unloading of a disc to / from a CD player is applied to the terminal 17. ing.

The reset circuit 20 resets the reset signal RS1 on the line 21 when the disc is removed from the player.
When the main power switch 18 is turned on, the reset signal RS2 is output to the line 22. The line 21 is connected only to the command decoding circuit 5, and the line 22 is connected to all blocks in the decoder 1, that is, the blocks 4, 5,
It is connected to 6, 7, 8, 10, and 11.

Therefore, when the main power switch 18 is turned on, the entire decoder 1 is reset and no signal is output from the output terminals 12 and 13 at this time. However, when the disk is removed, the command decoding circuit 5 is only reset, and in the reset state, the display control unit 10 selects the data of the register 11, that is, the blue back data. A blue (B) signal is output, and horizontal and vertical synchronization signals H and V are output from the terminal 13.
Will be output.

Although the RGB encoder 15 is externally attached in the above embodiment, it may be provided inside the decoder 1.

Next, in the embodiment shown in FIG. 3, a CD-G having a CD-G decoder 31 and a video CD decoder 32 is mounted.
A decoder 30 compatible with both G and video CDs is shown. Here, the CRT control unit 33 is a circuit including the display control unit 10 and the register 11 of FIG. The CD-G decoder 31 and the video CD decoder 32 are respectively the blocks 4 and 4 in FIG.
VRAM, including those equivalent to 5, 6, 7, and 8
9 is external.

In this case, the reset signal RS1 output from the reset circuit 20 may reset the entire decoders 31 and 32, or, as described in FIG. 1, may reset only the command decoding circuit 5 therein. Good.

[0021]

As described above, according to the present invention, the fixed color data is output from the circuit for processing the image data of the reproduction signal when the disc is exchanged, so that the screen is not disturbed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall schematic configuration of a CD-G reproduction player embodying the present invention.

FIG. 2 is a circuit block diagram of a main part thereof.

FIG. 3 is a circuit block diagram showing a schematic configuration of a main part of a reproducing player embodying the present invention.

[Explanation of symbols]

 1 CD-G Decoder 4 Sub Code Processing Circuit 5 Command Decoding Circuit 7 Read / Write Control Circuit 9 Image Memory 10 Display Control Unit 11 Register 18 Main Power Switch 19 Sensor 20 Reset Circuit

Claims (3)

[Claims] 1. An image reproducing apparatus for reproducing image data recorded on a disc, and storing means for storing predetermined color data for fixing a screen to a predetermined color, and predetermined color data from the storing means. Selecting means for outputting one of the reproduced image data, detecting means for detecting the unloading of the disc, and outputting the predetermined color data when a signal indicating the unloading of the disc is output from the detecting means. An image reproducing apparatus comprising: a control unit that controls the selection unit. 2. The disc is a CD-G type or a video C type.
The image reproducing device according to claim 1, wherein the image reproducing device is a disc in which image data is recorded by a D system or a DVD system. 3. A write / read control circuit for storing and reading image data reproduced from a disc in a memory according to a command signal also reproduced from the disc, and for fixing a television screen to a predetermined color. Storage means for storing the predetermined color data, selection means for outputting one of the predetermined color data of the storage means and the image data read from the image memory, and the write / read control circuit when a power ON signal is received. An image data processing circuit comprising: a reset circuit for resetting the selecting means and, when receiving an unloading signal of the disc, outputting a reset signal for causing the selecting means to output the predetermined color data from the storing means.