KR0124403B1 - Audio dubbing apparatus for cd/vcr - Google Patents

Abstract

An audio dubbing apparatus in a system containing a compact disk player and a VCR is disclosed. When a dubbing mode is selected at a key inputting unit(70), a microcomputer(30) generates switching control signals to a switching unit(60) and a switching unit(52). An audio erasing head(61) is operated by operating an oscillator(31). Only an L-channel voice information is recorded at an audio track of the video tape.

Description

Audio Dubbing in Compact Disc Players and Video Cassette Recorders

1 is a block diagram for explaining an audio dubbing device and its operation flow in a combination product of a CD player and a VCR according to the present invention.

2 is a diagram showing a recording format of a video tape used in a VCR.

* Explanation of symbols for main parts of the drawings

10: compact disc 11: optical pickup

13: RF amplification unit 14: digital signal processing unit

15: digital / analog converter 16: low pass filter

20: Audio output selector 30: Micom

31: second oscillator 32: first oscillator

40: image processing unit 41: video head

42, 52, 60: switching means 50: voice processing unit

51: audio head 61: audio erase head

The present invention relates to an audio dubbing apparatus for a CD player and a VCR composite product. In particular, an audio dubbing function is added to a microcomputer control unit to record an audio signal played / output from a CD player onto a video tape of a VCR. The present invention relates to an audio dubbing device for a player and a VCR combination product.

At present, CD is widely used as an information recording medium in the form of an optical disc in which a large amount of audio information is recorded. Since the recorded data is optically detected and reproduced, in theory, a high-quality disc is always uniform regardless of the number of times the disc is played. It has the advantage of having a pi regeneration characteristic.

The data recorded on the CD includes a synchronization signal, and a block from the synchronization signal to the next synchronization signal is called a frame. Each frame has a sub code containing control information and various service information starting from a synchronization signal (frame synchronization signal) indicating the head of the frame, and also an audio signal and an error correction signal. In the above subcode, there are eight channels of PW. Currently, in compact disc digital audio (CDDA), generally, only P and Q channels are used for the song number, index number, playback time, total time from the beginning of the program, and audio. The signal indicates presence or absence.

Then, a compact disc graphic (CDG) using the CDDA format as described above and recording still picture data (graphic data) using R-W channels of subcodes is developed, and a CDG player for reproducing the CDG. Has been developed to achieve excellent hi-fi audio like CDDA, and to display graphic background and subtitle images on display devices such as television screens and monitors to meet consumer demands for audio and visual combinations. It also makes me.

In addition, as VCRs and CD players are widely used in recent years, development of compact products by combining these systems is being conducted. Such composite products are capable of reproducing video tapes and recording of television broadcast signals through tuners. Operation, CDG playback, and video and audio signals recorded from CDG can be controlled by a single control input, which is convenient. However, the function of dubbing audio signals played on a CD player to the video tape of the VCR is convenient. There was no.

Accordingly, the present invention has been made in view of the above circumstances, and in the case of selecting the audio dubbing mode by adding an audio dubbing mode key to the key input means and adding an audio dubbing function to the microcomputer control means, the playback / output in the CD player is selected. It is an object of the present invention to provide an audio dubbing device in a CD player and a VCR composite product capable of recording an audio signal on a video tape of a VCR.

According to the audio dubbing device of the CD player and the VCR composite product of the present invention for achieving the above object, the data recorded on the CD is controlled by the control of the microcomputer 30 according to the key input signal from the key input unit 70. After reading optically and amplifying the read RF signal, the digital audio data processed by the digital signal processor 14 is converted into an analog signal by the digital / analog converter 15, and the low pass filter 16 is used. After separating the L channel and the R channel through the CD player to output to the speaker via the audio output selector 20 is switched to the CD mode and VCR mode under the control of the microcomputer 30, and the key input unit 70 Playback / recording function from the control unit reads / amplifies the data stored in the videotape according to the control of the microcomputer according to the input signal, and then performs video / audio processing by the video / audio processing unit 40 or 50. The VCR, which is output to a monitor and a speaker that is not connected to the video signal, or to a video tape by processing the video / audio signal input from the tuner or the video / audio signal input from an external input terminal by the video / audio processor In a combination product of a configured CD player and a VCR; As the audio dubbing mode is selected from the key input unit 70, the microcomputer 30 sends a predetermined control signal to the third switching means 60 to switch to the CD signal input mode, and to switch to the CD signal input mode. 32, 31 transmits a predetermined control signal to the second oscillator 31 to drive the second oscillator 31 to operate only the audio erasing header 61, whereby the CD player and the VCR operate in the playback mode, It is further provided with a function to record only the separated L channel voice information through the player's low pass filter 16 to the audio track of the video tape.

Here, the key input unit 70 is further provided with an audio dubbing key for selecting an audio dubbing mode.

Therefore, according to the present invention configured as described above, when the audio dubbing mode key is selected from the key input unit 70, the contact point of the third switching means 60 is shorted and the first erasing oscillator 32 is not driven. The second erasing oscillator 31 is driven so that the CD player processes the data recorded on the CD and outputs it to the speaker, and the VCR operates in the playback mode so that the image data read from the video tape by the video head 41 is displayed. The audio signal of the L channel among the L channel and the R channel separated by the low pass filter 16 of the CD player is output to the monitor after being processed by the processor 40 and output to the monitor. Audio processing is performed by the audio processing unit 50 via 60, and the audio head 51 is recorded on the audio track of the video tape. You will be able to record on the dio tape.

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

FIG. 1 is a block diagram illustrating an audio dubbing apparatus and its operation flow in a CD player and a VCR composite product according to the present invention, wherein reference numeral 10 is a CD, and 11 is data recorded on the CD 10. Is an optical pickup for optically reading a signal, 13 is an RF amplifying unit for amplifying an RF signal from a photo director (not shown) installed in the optical pickup 11, and 14 is an RF signal from the RF amplifying unit 13. A digital signal processor for receiving a digital audio signal from the digital signal processor 14 and converting / outputting an analog signal after receiving a digital audio signal from the digital signal processor 14. 16 is a low pass filter that receives the audio signal from the digital / analog converter 15 and performs low pass filtering to separate the L and R channels, and 20 is a CD player from the key input unit 70. Or an audio output selector that switches to either a CD mode or a VCR mode as either VCR is selected.

Further, reference numeral 41 denotes a video head for recording image data on a video track of a video tape or reading image data from a video track of a video tape, and 40 denotes a signal processing image signal input from an external source in a recording mode. The image processing unit is applied to the video head 41 and, in the playback mode, processes the image data read out from the video head 41 and outputs the image data to a monitor (not shown) through a predetermined process.

Reference numeral 51 denotes an audio head for recording audio data on an audio track of a video tape or reading audio data from the video tape. 50 denotes an audio head by processing an audio signal input from an external source in a recording mode. And an audio processing unit for processing the audio data read out from the audio head 41 in the playback mode and outputting the audio data to a speaker (not shown) through a predetermined process. It is a video / audio erasing oscillator which enables the erasing operation by driving. 30 is a microcomputer that outputs a control signal to each component according to a key input signal from the key input unit 70 to perform a predetermined operation. The 70 is equipped with a tape play mode key for playing a video tape and a recording mode key for recording on a video tape. Each key input unit used as the user's selection means is shown.

In addition, reference numeral 61 denotes an audio scavenger head that records a video / audio signal input while the VCR is in a recording mode while the full scavenger head erases the entire data recorded on the tape. The head records the audio signal after erasing the information recorded in the L channel of the audio track.

On the other hand, in the present invention, the key input unit 70 is further provided with an audio dubbing mode key serving as a selection means for recording the audio signal reproduced from the CD player on the video tape, and the microcomputer 30 has the key input unit ( 70, audio dubbing control is performed as the audio dubbing key is selected.

In addition, the second processing unit 52 and the third switching unit 60 are switched in response to the control signal from the microcomputer 30, so that the audio information of the L channel reproduced by the CD player is reproduced. In addition to being applied to the input terminal, the audio erasing oscillator 31 is driven in accordance with the control signal of the microcomputer 30 to cause the audio erasing head 61 to erase the audio track of the video tape.

Next, the audio dubbing device of the CD player and the VCR combination product of the present invention configured as described above will be described in more detail with reference to FIGS. 1 and 2.

That is, when the user first selects the audio dubbing mode key of the key input unit 70, the microcomputer 30 transmits a predetermined control signal to the second switching means 52 and the third switching means 60 according to the key input signal. By transmitting and switching the second switching means 52 and shorting the contact point of the third switching means 60, the audio signal of the L channel and the L channel separated by the low pass filter 16 of the CD player The third and second switching means (60, 62) is applied to the input terminal of the voice processing unit 50, and the microcomputer 30 for audio mute while the video erasing oscillator 32 is left as it is The audio control head 61 is driven by sending a predetermined control signal to the oscillator 31 to erase only the audio track in the recording format shown in FIG.

Here, the audio muting oscillator 31 of the video erasing oscillator 32 is turned off according to the control signal of the microcomputer 30 when the VCR is in the playback mode, so that the erasing operation is not performed. At the time, both of the video head 41 and the audio head 51 operate in the erase mode, so that the entire erasing operation is performed.

Therefore, the audio signal of the L channel of the reproduction signal reproduced by the CD player is passed through the third switching means 52, which is switched by the microcomputer 30 via the third switching means 60, and then the audio processing unit 50. Is input / voiced to the L channel of the audio track shown in FIG. 2 erased by the audio erasing head 61.

At this time, the CD player operates in the playback mode so that the audio signal to be reproduced is output to a speaker (not shown) via the audio output selector 20. Similarly, the VCR also reproduces except for the audio processing portion. The image data read out from the video tape by the video head 41 in the mode is image-processed by the image processing unit 40 and through a predetermined process through its output terminal OUT on a screen of a monitor (not shown). Will be displayed.

Therefore, according to the present invention operating as described above, when the user selects the audio dubbing mode, it is possible to record the music played from the CD player to the audio track of the video tape to match the image played back from the VCR and displayed on the screen of the CRT By allowing the user to edit music and the like that he / she wants to listen to, the functions given to the consumer can be further enhanced.

Claims (2)

Under the control of the microcomputer 30 according to the key input signal from the key input unit 70, the data recorded on the CD is optically read, the read RF signal is amplified, and then the digital signal processing unit 41 processes the digital signal. The converted digital audio data into an analog signal by the digital / analog converter 15 and separate the L / R channel through the low pass filter 16 and then control the CD mode according to the control of the microcomputer 30. The CD player outputs to the speaker via the audio output selector 20 switched to the VCR mode, and the data stored in the videotape is read by the control of the microcomputer according to the playback and recording function input signals from the key input unit 70. Video / audio processing by the video / audio processing unit 40, 50 to output to a monitor and a speaker (not shown), or a television video / audio signal or an external input terminal from a tuner. In the video / audio signal input from the composite product of the video / audio processing CD player and a VCR that is treated by (40, 50) configured compound of the VCR to be recorded on a video tape; As the audio dubbing mode is selected from the key input unit 70, the microcomputer 30 transmits a predetermined control signal to the third switching means 60 to short-circuit the predetermined signal. To switch to the CD signal input mode, send a predetermined control signal to the second oscillator 31 among the first and second oscillators 32 and 31 to drive the second oscillator 31 to drive the audio erasing head. By operating only 61, the CD player and the VCR are operated in a playback mode, and further have a function of recording only the separated L channel voice information on the audio track of the videotape while passing through the low pass filter 16 of the CD player. Audio dubbing device for a CD player and a VCR combination product, characterized in that. The apparatus of claim 1, wherein the key input unit (70) is further provided with an audio dubbing mode key for selecting an audio dubbing mode.