KR19990049461A - Background playback device and control method - Google Patents

Abstract

The present invention relates to a disc reproducing apparatus, and more particularly, to a background reproducing apparatus and a method for displaying a desired background image during reproduction of an audio signal from a CD in a CD / DVD combined reproducing apparatus.

The background image reproducing apparatus of the present invention comprises: an optical pickup apparatus for reading data from the first and second discs; A signal processor for signal-processing the video and audio signals read from the optical pickup apparatus; A memory for storing an image signal of a first disc read from the optical pickup apparatus; And control means for controlling the video signal stored in the memory to be output when the audio signal is output from the second disk.

Description

Background playback device and control method thereof.

The present invention relates to a disc reproducing apparatus, and more particularly, to a background reproducing apparatus and a method for displaying a desired background image during reproduction of an audio signal from a CD in a CD / DVD combined reproducing apparatus.

CD stands for Compact Disc, which is a small optical disc 12 cm in diameter. CDs have a wide range of uses, from music to video to computers. The wide use range of CD is because it is easy to carry and can store a large amount of data, and because digital signal processing is performed, the output sound or output quality is very good for repeated playback.

A further advanced recording medium in such a CD is a digital video disc (hereinafter referred to as a DVD). The DVD is said to be a next-generation multimedia recording medium, because it can store a large amount of data, which is about 6 to 7 times the CD capacity, in particular.

As such, future recording media have been developed into optical discs such as CDs or DVDs, and recording / reproducing apparatuses for recording or reproducing data recorded on the optical discs have compatibility of the CDs and DVDs as a problem. . The reason is that since CDs are already widely distributed to consumers in the area of CDs, especially audio, that are already used, DVD players that ignore the audio area of CDs are inevitably less competitive in sales.

Therefore, the conventional disc player is configured to selectively play a CD or a DVD as shown in FIG.

A conventional disc reproducing apparatus includes an optical disc (1), an optical pickup (3) for reading out data recorded on the data recording surface of the optical disc (1), converting the data into an electrical signal, and outputting the same. And a high frequency amplifier 29 for inputting and amplifying the outputted reproduction signal. And a servo unit 7 for selectively applying a drive signal according to DVD or CD to the rotation drive motor 25 of the optical disc 3, the motor 25 and the optical pickup device 3, and the servo unit. And a microprocessor 9 for controlling the operation of (7) and for controlling the overall operation of the system by the key input from the key input unit 11.

That is, the conventional optical disc reproducing apparatus is configured to reproduce the data of the CD or the data of the DVD under the control of the microprocessor 9. Therefore, the motor 25, the optical pickup device 3, the high frequency amplification unit 29, the servo unit 7, and the like may be rotated, focused, and tracked, and the signal compensation rate depends on the disc mounted under the control of the microprocessor 9. Etc., control is appropriately performed. After the disk control is performed for each disk, data is read or signal processing of the read data is performed.

In addition, the conventional optical disc reproducing apparatus includes a CD DSP 33 which performs a CD signal processing such as EFM demodulation and error correction by C1 and C2, by taking a high frequency signal reproduced from the high frequency amplifier 29, and And a digital / analog converter 21 for converting data output from the CD DSP 33 into an analog signal and outputting the same using an output device such as a speaker. That is, the CD DSP 33 performs signal processing for decoding the data reproduced from the CD, where the CD has been described for audio.

The conventional optical disc player includes a DVD DSP 5 for inputting a high frequency signal reproduced from the high frequency amplifier 29 and performing primary decoding such as data demodulation and error correction according to the reproduction of a DVD, and the DVD DSP ( 5) a VBR buffer 27 for temporarily storing data output from 5), a video decoding circuit 13 for decoding a video signal from data output from the VBR buffer 27 under the control of a microprocessor 9, and a micro And a graphics circuit 15 for decoding the subtitle signal under the control of the processor 9, and an audio signal processor 17 for decoding the audio signal under the control of the microprocessor 9.

The encoder 23 mixes the video data output from the video decoding circuit 13 and the subtitle data output from the graphics circuit 15 to convert the video data into a signal that can be displayed on a television. The audio data output from the audio signal processor 17 passes through the CD / DVD selector 31 and is output to the digital / analog converter 21. The CD / DVD selector 31 selectively forms a data output line connected to the digital / analog converter 21 among the CD DSP 33 or the audio signal processor 17, and the control is performed by the microprocessor 9 ) Is based on what disk is currently installed in the system.

That is, in the case of DVD playback, a CD / DVD combined disc playback apparatus includes a video decoder for performing signal processing of video data reproduced from a DVD, and an audio decoder for performing signal processing of audio data. In order to reproduce the CD, an audio decoder which performs a signal processing of the audio data reproduced from the CD is provided, and the audio signal output apparatus reproduced from the audio decoder of the DVD / CD is commonly used.

Next, it is determined what is the mounted disk of the conventional CD / DVD combined disc playback apparatus having the above configuration, and the control process accordingly will be described. For ease of explanation and understanding, the dual disc playback apparatus described below is assumed to be set for DVD at the time of initial operation and explained.

When the user powers on through the key input unit 11, the microprocessor 9 recognizes this by the standby power supply and performs control for driving the system as a whole.

Then, when power is applied to each component of the system, the microprocessor 9 controls the servo unit 7, the optical pickup device 3, and the high frequency amplifier 29 for the DVD set initially. If any of the optical discs 10 mounted by this operation are DVDs, there is a signal detected from the optical pickup device 3, but if the mounted discs are CDs, there is no signal detected from the optical pickup device 3; do. This is because, in the case of CD and DVD, various control such as focusing control and tracking control of the two discs and the rotational speed of other discs are performed.

When it is determined that the loaded disc is a DVD by the above operation, the microprocessor 9 maintains the system in the present control state, and performs control according to the reproducing operation of the disc. Therefore, the signal detected by the optical pickup device 3 is amplified by the high frequency amplifier 29 by a predetermined amount and then output to the DSP 5. The DSP 5 performs digital signal processing such as demodulation and error correction of the input signal, and outputs the digital signal. The output signal is stored in the VBR buffer 27.

The VBR buffer 27 is provided to adjust the data input / output time between the DSP 5 and the decoding circuits 13, 15, and 17. The reason is that the speed input to each decoding circuit section is slower than the speed output from the DSP 5, and in particular, since DVDs store data in accordance with various system specifications, seamlessly discarding unnecessary data and reproducing only desired data. Used to perform play.

Therefore, the output from the VBR buffer 27 is input to each decoding circuit section 13, 15, 17, and after decoding is performed in each decoding circuit, the video signal and the subtitle signal are converted into a television signal and output. The audio signal is output to the digital / analog converter 21 by switching switching of the CD / DVD selector 31, and is converted into an analog signal by the digital / analog converter 21 and output.

In other words, when a DVD is played back, video and audio signals are simultaneously played back, so that the CD / DVD combined playback device uses the audio output device and the video output device simultaneously. In other words, the video signal is output using a display device such as a television or a monitor, and the audio signal is output using an output device such as a speaker. Therefore, although the standby state of the CD DSP is formed in the reproduction mode of the DVD, since no special output state is formed by the CD DSP, there is no problem in the DVD signal processing.

On the other hand, when the loaded disc is a CD, there is no signal detected by the optical pickup device 3, and at this time, the microprocessor 9 enters the optical pickup device 3 and the high frequency amplifier unit in a controlled state by playing the CD. 29) and a control signal for driving the servo unit 7 is output.

Then, the optical pickup device 3 detects the data recorded from the disk, and the detected data is input to the CD DSP 33 through the high frequency amplifier 29. The DSP 33 performs digital signal processing of the input signal and outputs the digital signal. The CD / DVD selector 31 controls the terminal connected to the digital / analog converter 21 to be connected to the CD DSP 33 under the control of the microprocessor 9. Accordingly, the CD signal reproduced from the disc is converted into an analog signal by the digital / analog converter 21 and then output using an output device such as a speaker.

That is, when playing a CD, only the audio signal is played. Therefore, the CD / DVD combined playback device uses only the audio output device. However, even in the CD play mode, since the standby state in which power is supplied to the video play unit for playing the video signal is maintained, the display device for displaying the video screen displays the background screen of the video. In this case, a blue screen is normally displayed on the whole screen.

Therefore, when the user wants to play a CD using a CD / DVD player, the user must keep watching the blue screen, which is presented as a problem that causes the user to be bored and free.

Accordingly, an object of the present invention is to provide a background image playback apparatus and a control method thereof, which are set as a background image during DVD playback and can be displayed as a background image when a CD is played.

1 is a block diagram showing a general CD / DVD combined playback apparatus;

Fig. 2 is a block diagram showing a part controlled by the microprocessor 9 so that a specific video screen can be reproduced as a background screen when a CD is played in a CD / DVD player according to the present invention.

3 is an operation flowchart for storing a desired video screen during DVD playback and displaying as a background screen during CD playback according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: disc 3: optical pickup device

5: DVD DSP 7: Servo

9 microprocessor 11 key input unit

13: video decoding circuit 15: graphics circuit

17: audio signal processor 21: digital to analog converter

23: encoder 25: motor

27: VBR buffer 29: high frequency amplifier

31: CD / DVD selector

The background image reproducing apparatus of the present invention for achieving the above object comprises: an optical pickup apparatus for reading data from the first and second discs; A signal processor for signal-processing the video and audio signals read from the optical pickup apparatus; A memory for storing an image signal of a first disc read from the optical pickup apparatus; And control means for controlling the video signal stored in the memory to be output when the audio signal is output from the second disk.

According to another aspect of the present invention, there is provided a method for playing a background screen, the method including: playing a first disc including a voice signal; Designating a background screen when playing the voice signal; And processing the video signal stored in advance as a background image to reproduce the video signal together with the output of the audio signal recorded on the first disk.

Background of the Invention The present invention provides a method for playing a background screen, when a user outputs a favorite screen while playing a DVD, storing the output screen in a memory, and displaying the stored video screen as a background screen when a CD is played. It is characterized by.

Background image playback apparatus of the present invention is characterized in that it comprises a memory for storing the video screen selected by the user.

Accordingly, the apparatus and method for playing the background screen of the present invention can minimize the boredom and freeness by always displaying one screen to the user while selecting and displaying a desired video screen.

Hereinafter, a background screen reproducing apparatus and a control method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

The CD / DVD combined playback apparatus according to the present invention is the same as that of FIG. Only the configuration shown in Fig. 2 once again shows in detail the portion controlled by the microprocessor 9 so that a specific video screen can be reproduced as a background screen when the CD is played.

That is, the present invention further implements a configuration for storing a desired video screen in a memory at the time of DVD playback using a conventional configuration and displaying data stored in the memory at the time of CD playback.

The key input unit 11 applies an external input signal input by the user to the microprocessor 9. The external input signal at this time may be input to the microprocessor 9 by selecting an arbitrary key preset in the system during DVD playback, and using the same key as the key having a specific function, during playback of the system. When the signal is input, it may be possible to cause the microprocessor 9 to recognize the specific video screen as the selected signal.

As such, the signal input to the microprocessor 9 is a signal in which the user selects a specific video screen when the DVD is played. When this signal is input, the microprocessor 9 displays the video screen currently displayed on the video decoding circuit 13. It reads from and stores it in its memory 12. At this time, the stored video screen will be used for displaying as a background screen when the next CD is played.

In this way, the specific video screen currently being displayed can be stored in the memory 12. In the decoder in which data is decoded by MPEG, the last MPEG screen is stored at a predetermined address of a video frame buffer which stores its data. Therefore, when a user inputs a signal for storing a specific screen, the microprocessor 9 transmits a message to the video decoding circuit 13 to transmit MPEG data of the video screen currently being displayed. Then, the video decoding circuit 13 transmits the data of the video screen currently being displayed at the predetermined address of the VBR buffer 27 to the microprocessor 9, and the microprocessor 9 transmits the input data to its own. It stores in the memory 12.

When the reproduction signal of the CD is input to the microprocessor 9 by the key input unit 11, the microprocessor 9 performs control for reproduction of the CD and simultaneously stores data stored in the memory 12 in the video decoding circuit ( 13). Therefore, the video decoding circuit 13 decodes the video data output from the microprocessor 9 and outputs the video data output from the microprocessor 9 because the video decoding circuit 13 maintains the standby state even during CD playback.

Then, the user can listen to his / her favorite music while displaying the desired screen on the display even while playing the CD.

As another embodiment of the present invention, the data read from the microprocessor 9 and stored in the memory 12 may be data obtained by signal processing of the video decoding circuit 13 and the encoder 23. In this case, when the reproduction signal of the CD is input to the microprocessor 9 by the key input unit 11, the microprocessor 9 performs control for reproduction of the CD and simultaneously displays the data stored in the memory 12. It is possible to display a desired screen even during CD playback by outputting to a.

3 is an operation flowchart for storing a desired video screen during DVD playback and displaying it as a background screen during CD playback according to the present invention.

Next, with reference to Figs. 1, 2 and 3, how the video screen is stored during playback of the CD / DVD and how the stored video screen is displayed as the background will be described in detail. Incidentally, for easy explanation and understanding, the CD / DVD combined disc playback apparatus of the present invention described below is regarded as being set for DVD at the time of initial operation and explained.

The DVD is mounted on the disk's rotating table, and the playback request signal is outputted to the microprocessor 9 via the key input unit 11. The microprocessor 9 supplies the DVD playback mode according to the initial control state to the servo unit 7, the optical pickup device 3, the high frequency amplifier 9, and the CD / DVD selector 31 based on the inputted playback signal. Control of the furnace.

Thereafter, the disc 1 is rotated to match the rotational speed of the DVD, and the optical pickup device 3 in which tracking and focusing according to DVD playback is adjusted attempts to read data from the disc 1 being rotated.

If the mounted disc is a DVD, the microprocessor 9 recognizes that the signal is normally detected from the optical pickup apparatus 3 and that the signal is normally detected from the optical pickup apparatus 3. The data is reproduced in QQ speed while maintaining the DVD mode control state.

Therefore, the signal detected by the optical pickup device 3 is amplified by the high frequency amplifier 29 by a predetermined amount and then output to the DSP 5. The DSP 5 performs digital signal processing such as demodulation and error correction of the input signal, and outputs the digital signal. The output signal is stored in the VBR buffer 27. The VBR buffer 27 controls data input / output time between the DSP 5 and the decoding circuits 13, 15, and 17, and stores data according to various system specifications, thereby discarding unnecessary read data. It is used to perform seamless play for reproducing only data.

Therefore, the output from the VBR buffer 27 is input to each decoding circuit section 13, 15, 17, and after decoding is performed in each decoding circuit, the video signal and the subtitle signal are converted into a television signal and output. The audio signal is output to the digital / analog converter 21 by switching switching of the CD / DVD selector 31, and is converted into an analog signal by the digital / analog converter 21 and output.

While the DVD is being reproduced as described above, the microprocessor 9 determines whether the system is currently playing the DVD (Step 101). If the DVD is being played, the microprocessor 9 determines the external input according to the selection of the video screen for the CD background. It is always monitored whether a signal is input (step 103).

When the video screen selection signal is input during the monitoring of step 103, the video screen currently being displayed is read from the video decoding circuit 13 and stored in the memory 12 (step 105). Of course, even while the memory 12 of the MPEG data is stored for the specific video screen, the system continues to play the DVD and monitors whether an external input signal for storing the video screen is input.

That is, the selection of the image screen for the CD background screen can be performed several times in the QQ, in which case the selected screen will be stored at different addresses in the memory 12 under the control of the microprocessor 9. In addition, one screen may be displayed by the user's selection of the screen displayed during CD playback, or may be controlled so that a newly changed video screen is displayed every time CD playback is attempted.

On the other hand, when the state of the current system is set to the DVD mode, but the user-mounted disk is a CD, there is no signal detected by the optical pickup device (3), the microprocessor 9 controls to play the CD In this state, a control signal for switching operation of the optical pickup device 3, the high frequency amplifier 29, and the servo unit 7 is output. Then, the tracking and focusing is adjusted so that the optical pickup device 3 can read data from the CD, and the disk 1 is rotated in accordance with the reproduction speed of the CD. The high frequency amplification unit 29 also controls the signal processing of the input high frequency signal in accordance with the CD mode.

Thereafter, the optical pickup device 3 detects the data recorded from the disk, and the detected data is input to the CD DSP 33 through the high frequency amplifier 29.

The DSP 33 performs digital signal processing of the input signal and outputs the digital signal. The CD / DVD selector 31 controls the terminal connected to the digital / analog converter 21 to be connected to the CD DSP 33 under the control of the microprocessor 9. Accordingly, the CD signal reproduced from the disc is converted into an analog signal by the digital / analog converter 21 and then output using an output device such as a speaker (step 107).

In this way, the microprocessor 9 reads out the data stored in the memory 12 (step 109). At this time, when there are a plurality of data stored in the memory 12, it is possible to control so as to be sequentially read or by the user's selection.

The data stored in the memory 12 is output to the video decoding circuit 13. Therefore, since the video decoding circuit 13 maintains a standby state in which power is supplied even during CD playback, the video decoding circuit 13 can decode and output the video data output from the microprocessor 9.

The data output from the decoding circuit 13 is output after the conversion to the broadcast signal in the AA coder 23. The AA coder 23 converts the input video data into a broadcast signal and then displays it (step 111).

Then, the user can listen to his / her favorite music while displaying the desired screen on the display even while playing the CD.

In other words, when a CD is played back, only an audio signal is played. Therefore, a general CD / DVD combined playback device uses only an audio output device. However, even in the CD playback mode, since the standby state in which power is supplied to the video player for reproducing the video signal is maintained, the display device for displaying an image screen can display data applied from the video player. At this time, the output video signal becomes the background screen when the CD music is output.

In addition, the standby state and standby mode described in the present invention refer to a state in which power is being supplied, that is, a state in which signal processing is possible at any time when a basic signal is applied.

As described above, the apparatus and method for playing a background screen according to the present invention, in view of the video player maintaining the standby mode when playing a CD in a CD / DVD combined playback device, requires a user's desired video screen without additional power consumption. The advantage is that it can be displayed as a wallpaper.

Claims (10)

Playing the first disc including the audio signal; Designating a background screen when playing the voice signal; And reproducing the video signal along with the output of the audio signal recorded on the first disk by processing the pre-stored video signal as a background screen. The method of claim 1, further comprising: storing a wallpaper to be displayed when playing the first disc; The background image storing step may include: playing a second disc including a video signal; Selecting a still picture during playback of the video signal; And storing the image data constituting the selected still image. The method of claim 2, wherein the selected still picture is one or more. The method of claim 2, wherein the first disk is a CD. The method of claim 2, wherein the second disc is a DVD. The method of claim 1, wherein the background screen is data processed by signal processing for display. The method of claim 1, wherein displaying the background screen during the playback of the first disc comprises: determining whether the first disc is playing, and displaying the stored video screen when the first disc is playing. How to play the wallpaper made by. An optical pickup apparatus for reading data from the first and second disks; A signal processor for signal-processing the video and audio signals read from the optical pickup apparatus; A memory for storing an image signal of a first disc read from the optical pickup apparatus; And control means for controlling the video signal stored in the memory to be output when the audio signal is output from the second disk. The apparatus of claim 8, wherein the memory stores the output of the signal processor. The apparatus of claim 8, wherein the memory stores the output of the optical pickup apparatus.