KR0181040B1 - Apparatus for recording and reproducing audio signal in the digital vcr - Google Patents

Abstract

The present invention relates to an audio signal recording / reproducing apparatus of a digital V.C.R, comprising: a key input unit 300 for inputting a key signal for recording and reproducing an audio signal input to an effective lower edge region of a cassette tape; The controller 310 generates control signals corresponding to the key signals for recording and reproducing the audio signal provided to the key input unit 300, and if the control signal for recording the audio signal is provided from the controller 310, the audio signal. An audio signal processor 325 for processing an audio signal input through an input terminal, and processing and outputting the reproduced audio signal, and outputting a frequency modulation (FM) of the audio signal processed by the audio signal processor 325 In the FM modulator 345, the recording amplifier unit 335 for amplifying and outputting the output signal of the FM modulator 345 so as to be recordable, and in the recording amplifier unit 335 An audio head unit 330 for recording the widened signal in the effective lower edge region and reproducing and outputting an audio signal recorded in the effective lower edge region when a control signal for reproduction is provided from the controller 310. The preamplifier 340 pre-amplifies and outputs the signal reproduced at 330, the FM demodulator 350 demodulating the output signal of the preamplifier 340, and the control signal provided from the controller 310. And a capstan servo unit 315 for generating a drive signal and a capstan motor 320 driven according to the drive signal of the capstan servo unit 315 to drive the cassette tape when the recording and reproducing function is executed. Apart from the recording and playback of digital video and audio data on the C.R., other audio scenes are input from the outside using the unused effective lower edge area of the cassette tape. The call can be recorded and played.

Description

Digital V.C.R audio signal recording / playback device

1 is a diagram for explaining a recording and playback signal processing process in a digital V.C.

2 schematically shows a cassette tape used in a digital V.C.

3 is a block diagram showing a digital V. C. audio signal recording / reproducing apparatus according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

300: key input unit 310: control unit

315: capster servo unit 320: capster motor

325: audio signal processing unit 330: audio head unit

335: recording amplifier portion 340: preamp portion

345: FM modulator 350: FM demodulator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video cassette recorder (hereinafter abbreviated as digital V. C. al.), And more particularly to recording and reproducing an external audio signal using a predetermined unused area of a cassette tape. A digital V. C. audio signal recording / reproducing apparatus.

In general, V.C.R is a device used to record and play back video signals, record and play back other tapes, record in the absence of time, and record video signals through a camera. Since the development of the analogue V.C.al for broadcasting by the analog system, the V.R.A. technique of the analogue method has come to the present day thanks to the rapid development of precision machining and semiconductor technology.

In addition, recently, in the transmission of video signals, analog video signals are converted to digital signals and transmitted according to the research results that digital transmission can maintain much better image quality than analog transmission. Reproducible digital VC eggs have been developed and are in the distribution stage, and are being developed more and more.

FIG. 1 is a diagram for explaining a process of processing recording and playback signals in such digital V.C.R.

As shown in FIG. 1, the digital V.C.R 30 transmits a digital broadcast signal received from the satellite antenna 10 through a set-top box 20 to a deck portion ( (Not shown) to record on a cassette tape (not shown), and play back through the T.V screen (40).

That is, first, during recording, if the broadcast signal received through the antenna 10 is provided to the digital V.C. 30 through the set-top box 20 through a predetermined process, the digital V.C. The egg 30 encodes the digital signal provided from the set-top box 20 to record on the cassette tape.

Further, at the time of reproduction, the digital V.C.R.30 decodes the reproduction data provided from the reproduction head (not shown) of the deck portion and provides the set-top box 20 to the set-top box. 20 provides this data to the T.V screen 40 through a predetermined process, and thus the T.V screen 40 displays a reproduction signal provided through the set-top box 20. Done.

2 is a diagram schematically showing a cassette tape used in a digital V.C.

As shown in FIG. 2, the total width of this cassette tape is 6.35 mm, and the 'A' area, ie, the effective area lower edge, is 0.49 mm.

However, since the digital V.C.R does not record audio data on a separate audio track but records video and audio data on the same track, an effective lower edge area corresponding to the 'a' area of FIG. 2 is used. It doesn't work.

In other words, when recording and reproducing video and audio signals are executed in a general digital V.C. as shown in FIG. 1, the area 'A' shown in FIG. 2 is not used.

Accordingly, the present invention has been conceived in this respect, and an object of the present invention is to record and output an audio signal input from the outside using an unused effective lower edge area of a cassette tape when recording a digital video / audio signal. To provide a digital V.C.R audio signal recording / reproducing device that enables playback.

According to a preferred embodiment of the present invention for achieving the above object, recording and playing back an input audio signal using an effective area lower edge which is not used in a digital V.C. cassette tape. A digital V. C. audio signal recording / reproducing apparatus, comprising: a key input section for inputting a key signal for recording and reproducing an audio signal in an effective lower edge area of the cassette tape; A controller for generating respective control signals according to key signals for recording and reproducing the audio signal, an audio signal processor for processing and outputting an audio signal input through an input terminal when a control signal for recording is provided from the controller; , Frequency output modulation (FM) of the output signal of the audio signal processor; Record the output signal of the FM modulator, the recording amplifier unit amplifying and outputting the output signal of the FM modulator, and the output signal of the recording amplifier unit in the effective lower edge area, and a control signal for reproduction from the controller If provided, an audio head unit for reproducing and outputting the recorded audio signal, a preamplifier unit for preamplifying and outputting the output signal of the audio head unit, an FM demodulator for demodulating the output signal of the preamplifier unit, and the audio signal The processing unit processes and outputs a demodulated audio signal provided from the FM modulator during playback, and is driven and recorded according to a capstan servo unit generating a drive signal according to a control signal provided from the controller, and a drive signal of the capstan servo unit. And running the cassette tape at a constant speed when a playback function is executed. A capstan motor.

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

3 is a block diagram of a digital V.C.R audio signal recording / reproducing apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 3, the present invention provides a key input unit 300 and a key input unit 300 for inputting a key signal for recording and reproducing an audio signal input to an effective lower edge area of a cassette tape. The control unit 310 for generating respective control signals according to the key signals for recording and reproducing the audio signal, and the audio signal input through the audio signal input terminal when the control signal for recording the audio signal is provided from the control unit 310. An audio signal processor 325 for processing and outputting the processed audio signal, and an FM modulator 345 for frequency modulation (FM) outputting the audio signal processed by the audio signal processor 325; The recording amplifier unit 335 which amplifies and outputs the output signal of the FM modulator 345 so as to be recordable, and the signal amplified by the recording amplifier unit 335 in the effective lower edge area. When the control signal for reproduction is provided from the control unit 310, the audio head unit 330 for reproducing and outputting the audio signal recorded in the effective lower edge area and the signal reproduced from the audio head unit 330 are transposed. A preamplifier 340 for amplifying and outputting, an FM demodulator 350 for demodulating the output signal of the preamplifier 340, and a capstan servo unit for generating a drive signal according to a control signal provided from the controller 310. And a capstan motor 320 which is driven in accordance with the drive signal of the capstan servo unit 315 to drive the cassette tape when the recording and reproducing function is executed.

First, when a user presses an audio mode key (not shown) of the key input unit 300, the controller 310 switches a digital V.C. mode to an audio mode in which an audio signal is recorded or reproduced in an effective lower edge area. . Thereafter, the control unit 310 generates control signals according to the audio recording and audio reproduction key signals input from the key input unit 300. The control unit 310 will be divided into two cases of recording and reproduction.

First, when a key signal for recording an audio signal is provided through the key input unit 300, the controller 310 generates a control signal to the capstan servo unit 315, and accordingly, the capstan servo unit 320 controls the controller ( The driving signal according to the control signal of 310 is provided to the capstan motor 320.

Then, the capstan motor 320 is driven according to the drive signal of the capstan servo unit 315 to drive the cassette tape at a speed suitable for recording the recording audio signal.

At the same time, the control unit 310 generates a control signal to the audio signal processing unit 325, and thus the audio signal processing unit 325 processes the audio signal provided through the audio signal input terminal (not shown) to the FM modulator 345. To provide.

The FM modulator 345 frequency modulates the audio signal provided from the audio signal processor 345 and outputs the frequency signal to the recording amplifier 335. In addition, the recording amplifier unit 335 amplifies the frequency-modulated audio signal provided from the FM modulator 345 so as to be recordable and outputs it to the audio head unit 330.

Then, the audio head unit 330 is driven in accordance with the control signal of the control unit 310 to record the audio signal provided from the recording amplifier unit 335 in the lower effective edge area of the cassette tape.

On the other hand, when a reproduction key signal is input from the key input unit 300, the controller 310 generates a control signal according to the reproduction key signal of the key input unit 300 to the capstan servo unit 315.

Accordingly, the capstan servo unit 315 provides a driving signal to the capstan motor 320, and the capster motor 320 is driven according to the driving signal of the capstan servo unit 315 to reproduce the recorded audio signal. Run the cassette tape at a constant speed.

At the same time, the control unit 310 generates a control signal for reproduction by the audio head unit 330, and the audio head unit 330 is driven in accordance with the control signal of the control unit 310 to be located in the effective lower edge area of the cassette tape. The recorded audio signal is reproduced and output to the preamplifier 340.

The preamplifier 340 preamplifies the weak signal amplified by the audio head 330 and outputs the preamplified signal to the FM demodulator 350. The FM demodulator 350 reproduces the reproduced audio signal provided from the preamplifier. FM demodulation is provided to the audio signal processor 325.

Accordingly, the audio signal processor 325 processes the audio signal provided from the FM demodulator and outputs the audio signal to the speaker (not shown) through the audio signal output terminal (not shown).

On the other hand, according to the present invention, recording and reproducing of the audio signal may be performed simultaneously with recording and reproducing of the video and audio signal of the digital V.C.R.

Accordingly, the present invention records and plays back other audio signals input from the outside by using an unused effective lower edge area of the cassette tape separately from recording and reproducing digital video and audio data in the digital V.C.R. It can be effective.

While the invention has been shown and described with reference to certain preferred embodiments, those skilled in the art will recognize that various modifications and changes can occur without departing from the spirit and scope of the invention as set forth in the claims below.

Claims (1)

In an audio signal recording / reproducing apparatus of a digital VC egg for recording and playing back an audio signal input using an effectuve area lower edge which is not used in a digital V. C. cassette tape. A key input unit (300) for inputting a key signal for recording and reproducing an audio signal in an effective lower edge area of the cassette tape; A control unit (310) for generating respective control signals according to the key signals for recording and reproducing the audio signal provided to the key input unit (300); An audio signal processor 325 for processing and outputting an audio signal input through an input terminal when a control signal for recording is provided from the controller 310; An FM modulator (345) for frequency-modulating (FM) the output signal of the audio signal processor 325; A recording amplifier unit 335 for amplifying and outputting the output signal of the FM modulator 345 so as to be recordable; An audio head unit 330 which records an output signal of the recording amplifier unit 335 in the effective lower edge area and reproduces and outputs the recorded audio signal when a control signal for reproduction is provided from the controller 310. Wow; A preamplifier 340 for preamplifying and outputting the output signal of the audio head 330; An FM demodulator (350) for demodulating the output signal of the preamplifier (340); The audio signal processing unit 325 processes and outputs a demodulated audio signal provided from the FM demodulator 350 during reproduction, and generates a capstan servo unit generating a driving signal according to a control signal provided from the control unit 310 ( 315); Digital V. C. R. audio signal recording / reproducing apparatus including a capstan motor 320 driven according to a driving signal of the capstan servo unit 315 to drive the cassette tape at a constant speed when a recording and reproducing function is executed. .