KR0162338B1 - Device for managing helper signal of palplus vcr - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a helper signal processing device of a Pallas V-CAL. In the related art, when a Phelps signal is input to a PAL S-VHS V-CAL through a jack for luminance / color signals, There is an AM-Helper having a spectral characteristic, and there is a problem in that a component of 1 to 3.2 MHz is removed and recorded by a band pass filter (BPF) having the characteristic of FIG. 2 in the recording path of a color signal. In order to solve this problem, the present invention has been devised to convert and record to a recording format of Palphus VR when a color signal including a luminance signal and AM-Helper is input to PAlplus VRC. According to an embodiment of the present invention, when a color signal including luminance and AM-Helper is input to a PALplus VR, the luminance is converted to a recording format of the PAPR VR and the luminance is recorded. By synthesizing with and separating the color signals and separating them again, the circuit can be easily configured. In another embodiment, cross-talk can be prevented by separating and processing luminance and color signals.

Description

PALplus VSI's helper signal processing device

1 is a block diagram of a conventional helper signal processing apparatus.

2 is a characteristic waveform diagram of a band pass filter in FIG.

3 is a block diagram of an embodiment of the present invention.

4 is a block diagram of another embodiment of the present invention.

5 is a waveform diagram of a helper marker signal.

6 is a waveform diagram of a demodulated helper signal.

7 is a characteristic waveform diagram of a band pass filter in FIGS. 3 and 4;

8 is a characteristic waveform diagram of a low pass filter in FIGS. 3 and 4;

* Explanation of symbols for main parts of the drawings

201: adder

202, 209, 301, 304, 309, 312 to 314: switch

203, 302, 311: delays 204, 208, 303, 308: clamper

205, 305: band pass filter 206, 306: multiplier

207, 307: low pass filter 210, 310: luminance / color separation section

211, 315: register

The present invention relates to the processing of luminance and color signals in PALplus V-CAL, and in particular, processing of luminance and color signals including AM-Helper signals (AM-Helper) to record without distortion. ) Relates to a helper signal processing device of VP.

FIG. 1 is a block diagram of a conventional PAL S-VHS type BT signal helper signal processing device, and as shown therein, a signal input unit 101 into which luminance Yi and color Ci signals are input, and A band pass filter 102 for passing only a predetermined band of the color signals Ci of the signal input unit 101, and a luminance / color separation unit for separating the composite video signal CVBS into luminance Ys and color (Cs) signals ( 103 and a switch 104 for selecting one of the luminance signal Yi of the signal input unit 101 and the luminance signal Ys of the luminance / color separation unit 103 according to the switching signal SH, and switching. A switch 105 for selecting one of an output signal of the band pass filter 102 and a color signal Cs of the luminance / color separation unit 103 according to the signal SH, and the switches 104 and 105 And a recording unit 106 for recording the output signal Y (C) on the tape.

Referring to the operation of the conventional device as follows.

First, when the luminance Yi and the color Ci signals are input to the signal input unit 101 which is a s-jack, the switches SW1 and SW2 are connected to the 'H' side by the switching signal SH. It is switched to the terminal.

At this time, the color signal Ci of the signal input unit 101 is input to the switch SW2 after the low frequency component of 3.2 MHz or less and the high frequency component of 5 MHz or more are removed through the band pass filter 102 having the characteristics as shown in FIG. It is done.

Accordingly, when the switch SW1 selects the luminance signal Yi of the signal input unit 101 and the switch SW2 selects the color signal Ci 'of the band pass filter 102, the recording unit 106 is on the tape. Will be recorded.

When the composite video signal CVBS is input, the switches SW1 and SW2 are switched to the luminance / color separation unit 103 by the switching signal S-H.

In this case, the luminance / color separation unit 103 receives the composite image signal CVBS as an input and separates the luminance Ys and the color Cs into the switches SW1 and SW2, respectively.

Accordingly, the recording unit 106 which receives the luminance Ys and the color Cs signals of the luminance / color separation unit 103 through the switches SW1 and SW2 respectively records on the tape.

However, conventionally, an AM-Helper having a spectral characteristic of 1 to 5 MHz is present in a color signal when a Puff signal is input to a PAL_S-VHS V-CAL through a luminance / color signal jack. In the recording path of the color signal, a bandpass filter (BPF) having the characteristic of FIG. 2 has a problem in that a component of 1 to 3.2 MHz is removed and recorded.

According to the present invention, when the color signal including the luminance signal and AM-Helper is inputted to the Phelpless VR, the arm is invented to convert the recording to the recording format of the PAPR VR. An object of the present invention is to provide a helper signal processing apparatus of PALplus VSI.

In order to achieve the above object, an embodiment of the present invention synthesizes a color signal C including a luminance signal Y and an AM-helper signal AM-Helper and converts the color signal C into an AM helper signal CVBS + AM-Helper. A composite video signal CVBS + AM-Helper including an addition unit, an AM-Helper signal AM-Helper and a composite image signal CVBS + including an AM-Helper signal AM-Helper outputted from the addition unit. A first switch for selecting one of AM-Helpers according to the switching signal SH, delay means for delaying the output signal of the first switch, clamping means for fixing the output signal of the delay means to a constant level; Helper signal processing means for demodulating an AM-helper signal from an output signal of the first switch and outputting a baseband helper signal B / B-Helper; and if the helper marker signal HM is low, the clamping means. Select the output of the high and the helper signal processing means A luminance signal (Y + B / B-Helper) including a baseband helper signal (B / B-Helper) by separating the second switch for selecting an output and the output signal of the second switch into a luminance and a color signal; And luminance / color separation means for outputting the color signal c, and recording means for recording the output of the luminance / color separation means on a tape.

Another embodiment of the present invention for achieving the above object is to select the color signal (C) including the AM-Helper signal (AM-Helper) when the switching signal (SH) is high, and the AM-Helper signal (AM-Helper) A composite switch including a first switch for selecting the composite image signal CVBS + AM-Helper and an AM-Helper signal output from the first switch when the switching signal SH is low. A second switch for selecting the signal CVBS and selecting the luminance signal Y if high, a first delay means for delaying the output signal of the second switch, and an output signal of the first delay means at a constant level. Clamping means for fixing, helper signal processing means for demodulating the AM-helper signal from the output signal of the first switch, and outputting a baseband helper signal B / B-Helper, and the helper marker signal HM is low; Then select the output of the clamping means and A third switch for selecting an output of the helper signal processing means and a luminance signal Y + including a baseband helper signal B / B-Helper by separating the output signal of the third switch into a luminance and a color signal; Luminance / color separation means for outputting the B / B-Helper) and the color signal C, second delay means for delaying the color signal C including the AM-Helper signal AM-Helper for a predetermined time; A fourth switch for selecting an output signal of the second delay means when the helper marker signal HM is low and a constant constant voltage Vdc if high, and an output signal of the third switch if the switching signal SH is high Is selected and the fifth switch selects the luminance signal of the luminance / color separation means, and when the switching signal SH is high, the output signal of the fourth switch is selected and the luminance value of the luminance / color separation means is low. The fifth switch for selecting the signal and the switching signal SH A sixth switch for selecting an output signal of the fourth switch if high and a color signal for the luminance / color separation means if low, and recording means for processing and recording the output signals of the fifth and sixth switches on a tape Consists of.

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

3 is a circuit diagram of an embodiment of the present invention, as shown therein, an adder 201 and an AM- that synthesize a color signal C including a luminance signal Y and an AM-Helper signal. Composite image signal CVBS + AM-Helper including helper signal AM-Helper and composite image signal CV-AM-Helper including AM-Helper output from the adder 201 A switch 202 for selecting one of the switches according to the switching signal SH, a delay unit 203 for delaying the output signal of the switch 202, and an output signal of the delay unit 203 at a fixed level And a band pass filter 205 for passing only an AM-helper signal that is a predetermined band component among the output signals of the switch 202, and an AM-helper signal of the band pass filter 205 (AM-Helper). Is a multiplier 206 that demodulates the modulated frequency fsc by mixing a predetermined frequency, and only a predetermined low-pass component of the output signal of the multiplier 206 A low pass filter 207 for passing through and outputting a baseband signal, a clamper 208 for fixing the output of the low pass filter 207 at a constant level, and the clamper (HM) when the helper marker signal HM is low; A switch 209 for selecting the composite video signal CVBS output from the 204 and selecting the helper signal B / B-Helper outputted from the clamper 208 when the signal is high; and an output signal of the switch 209. Is divided into luminance and color signals and outputs a luminance signal (Y + B / B-Helper) including a baseband helper signal (B / B-Helper) and a color signal (C) 210. And a recording unit 211 for recording the luminance signal Y + B / B-Helper of the luminance / color separation unit 210 in the luminance band of the tape.

According to the exemplary embodiment of the present invention, the composite image signal CVBS + is input when the color signal C including the luminance signal Y and the AM-Helper signal is input to the PALplus V-CAL. After converting to AM-Helper), it converts to and records the recording format of Palph. V-CAL.

First, when the composite image signal CVBS + AM-Helper is input to the Palfrus VR and the signal SH for switching the switch 202 becomes low, the composite image signal CVBS + AM-Helper is switched to the switch ( It is input to the delay 203 and the band pass filter 205 through 202.

At this time, when the band pass filter 205 receiving the composite video signal CVBS + AM-Helper has a spectral characteristic of 1 to 5 MHz as shown in FIG. 7, the mixer 206 passes only the AM-Helper component. A low pass filter 207 that demodulates at a modulation frequency (fsc = color carrier 4.43 MHz) and has a spectral characteristic of 0 to 3.5 MHz as shown in the eighth degree, filters the output signal of the mixer 206 to base-band. ) Helper signal is input to the clamper 208.

In addition, the delay unit 203 receiving the complex image signal CVBS + AM-Helper through the switch 202 delays the processing time of the band pass filter 205 and the low pass filter 208 and then clamps the clamper ( The input to 204 compensates for the delay time.

Accordingly, when the delayed signal in the delay unit 203 is clamped to a certain level in the clamper 204 and the helper signal of the low pass filter 207 is clamped to a certain level through the clamper 208, the switch 109 is connected to the fifth. Under the control of the helper marker signal HM such as a diagram, the output of the clamper 204 is selected and input to the luminance / color separation unit 210 if the section is the main region, and the output of the clamper 208 if the section is the helper region. Is selected and input to the luminance / color separator 210.

That is, in the signal section of the main region instead of the helper region, the switch 209 is always low, and the composite image signal CVBS is delayed only by a predetermined time. The same signal as 6 degrees is input.

Therefore, when the complex image signal CVBS + AM-Helper including the baseband helper signal is input, the luminance / color separator 210 receives the color signal C and the baseband helper signal B / B-Helper. Recording is performed on the tape by separating each of the included luminance signals (Y + B / B-Helper) and outputting them to the recording unit 211.

On the other hand, when the luminance (Y) and the color (C + AM-Helper) signals are input, they are added by the adder 201 to become the composite image signal CVBS + AM-Helper, and then switched by the high switching signal SH. The switch 202 is input to the delay unit 203 and the band pass filter 205.

Thereafter, the same operation as that in the case where the composite video signal CVBS + AM-Helper is input is performed and recorded on the tape in the recording unit 211.

FIG. 4 is a circuit diagram of another embodiment of the present invention. As shown therein, when the switching signal SH is high, the color signal C including the AM-Helper signal AM-Helper is selected, and when it is low, the AM-helper signal is selected. A switch 304 for selecting the composite video signal CVBS + AM-Helper including the AM-Helper and an AM-Helper signal output from the switch 304 when the switching signal SH is low. ), A switch 301 for selecting the composite video signal CVBS including the < RTI ID = 0.0 >) < / RTI > A clamper 303 for fixing the output signal of the signal 302 to a constant level, a band pass filter 305 for passing only an AM-helper signal which is a predetermined band component among the output signals of the switch 304, and the band pass filter ( Demodulating by mixing the AM-Helper signal (AM-Helper) of 305 to the modulation frequency (fsc) A low pass filter 307 that passes only a predetermined low pass component of the output signal of the multiplier 306 and outputs a base-bamd helper signal, and an output of the low pass filter 307. Selects a clamper 308 that outputs a helper signal at a fixed level, and a composite image signal CVBS output to the clamper 303 when the helper marker signal HM is low, and the clamper 308 when the helper marker signal HM is low. A switch 309 for selecting a helper signal (B / B-Helper) to be outputted as a signal, and the output signal of the switch 309 are divided into luminance and color signals to provide a baseband helper signal (B / B-Helper). A luminance / color separator 310 for outputting the included luminance signal Y + B / B-Helper and the color signal C, and a color signal C including the AM-helper signal AM-Helper. If the delayer 311 that delays the predetermined time and the helper marker signal HM are low, the output signal of the delayer 311 is selected. A switch 312 for selecting the voltage Vdc, and a switch for selecting an output signal of the switch 309 when the switching signal SH is high and a luminance signal of the luminance / color separation unit 310 when low. 313, a switch 314 for selecting an output signal of the switch 312 when the switching signal SH is high, and a color signal for the luminance / color separation unit 310 when low, and the switch ( And a recording unit 315 for processing the output signals of the 313 and 314 and recording them on a tape.

According to another embodiment of the present invention configured as described above, the color signal C including the luminance signal Y and the AM-Helper signal AM-Helper is input to the PALplus V-AL, respectively. It is a method of recording after converting to the recording format of the Real. The operation thereof is described as follows.

First, when the composite image signal CVBS + AM-Helper is input so that the switching signal SH is low, the switches 301, 304, 313, and 314 are connected to the low side, and thus, the same as the third diagram. Since the same circuit as that of the exemplary embodiment is configured, the luminance / color separator 310 includes the base band helper signal B / B-Helper through the same operation as that of the exemplary embodiment. The recording unit 315, which receives the and color (C) signals through the switches 314 and 315, respectively, records on the tape.

Meanwhile, when the color signal C + AM-Helper including the luminance signal Y and the AM-Helper signal is input and the switching signal SH becomes high, the switch 301 switches the luminance signal ( Y) is input to the delayer 302, the switch 304 inputs the color signal C including the AM helper signal AM-Helper to the band pass filter 305, the switch 313 is the switch 309 Select the output of the switch 314 is switched to select the output of the switch 312.

At this time, the delay unit 302 delays the luminance signal Y input through the switch 301 by the operation time of the band pass filter 305 and the low pass filter 307 and inputs it to the clamper 303. You will compensate for time.

Then, the color signal C + AM-Helper including the AM-Helper is filtered through the switch 304 through a band pass filter 305 having the same spectral characteristics as the seventh degree, and then the mixer 306. Demodulated at a modulation frequency fac, and the demodulated signal is passed through a low pass filter 307 having a spectral characteristic equal to the eighth degree, and only the base band helper signal B / B-Helper is clamped. 308).

Accordingly, the clamper 303 fixes the luminance signal Y output from the delayer 302 at a constant level, and the baseband helper signal B / B outputted from the low pass filter 307 by the clamper 308. -Helper) at a constant level, the switch 309 selects the luminance signal Y of the clamper 303 if the helper marker signal HM, such as the fifth degree, is low, and the base of the clamper 308 if high. The helper signal B / B-Helper of the band is selected and output to the switch 313 to generate the luminance signal Y including the baseband helper signal B / B-Helper.

In addition, the color signal C including the AM-Helper signal AM-Helper is input to the switch 312 after being delayed by the delay time of the delay unit 302 for the luminance signal Y from the delay unit 311. .

Accordingly, the switch 312 selects the output of the retarder 311 when the helper marker signal HM as shown in FIG. 5 is low, and outputs the color signal C to the switch 314 when the helper marker signal HM is low. Select) to remove the AM-Helper signal.

Accordingly, the recording unit 315 records the luminance signal Y including the baseband helper signal B / B-Helper input through the switch 313 in the luminance band of the tape and is input through the switch 314. The color signal C is recorded in the color band of the tape.

As described in detail above, the present invention provides a method for converting and recording to a recording format of a Palpus V-CAL when a color signal including a PALplus V-CAL luminance and an AM-Helper signal is input. The embodiment has an effect that the circuit can be easily configured by combining the luminance and color signals and then separating them again, and another embodiment can prevent cross-talk generation by separating and processing the luminance and color signals. It works.

Claims (4)

Adding means for synthesizing the color signal C including the luminance signal Y and the AM-Helper signal and converting the color signal C to the composite image signal CVBS + AM-Helper including the AM helper signal; Delay means for delaying the composite video signal CVBS + AM-Helper including the AM-Helper signal of the addition means, clamping means for fixing the output signal of the delay means to a predetermined level, and the addition A helper signal processing means for demodulating the AM-helper signal from the output signal of the means and outputting a baseband helper signal B / B-Helper, and selecting the output of the clamping means if the helper marker signal HM is low And a high switch that selects an output of the helper signal processing means, and a luminance signal including a baseband helper signal B / B-Helper by separating the output signal of the second switch into a luminance and a color signal. Luminance / to output (Y + B / B-Helper) and color signal (C) Cypress arm (PALplus) V CR helper signal processor of, characterized in that the separating means is configured with the output of a luminance / color separation means, a recording means for recording on the tape. The complex image signal CVBS + AM-Helper including the AM-Helper signal externally inputted by the signal SH and the AM-Helper signal of the addition means. And a switch for selecting one of the composite video signals (CVBS + AM-Helper) including and outputting the delayed signal and the helper signal processing means to the helper signal processing device of PALplus BCAL. A color signal C + AM including first delay means for delaying the luminance signal Y, clamping means for fixing the output signal of the first delay means to a constant level, and an AM-Helper signal AM-Helper Helper signal processing means for demodulating the AM-helper signal and outputting the baseband helper signal (B / B-Helper); if the helper marker signal (HM) is low, the output of the clamping means is selected, Is a first switching means for selecting an output of the helper signal processing means and a luminance signal Y + B / B-Helper including the baseband helper signal B / B-Helper. ) And a second color means for separating the color signal (C) including the AM-Helper signal (AM-Helper) for a predetermined time, and the helper marker signal (HM). Is low, the output signal of the second delay means is selected, and if A second switching means for selecting, a third switching means for selecting an output of the first switching means if the switching signal SH is high and a luminance output of the luminance / color separation means if low, and a switching signal SH ) Is a fourth switching means for selecting the output of the second switching means if the high), and the color output of the brightness / color separation means if the low) PALplus helper signal processing device . The composite image signal of claim 3, wherein the color signal C including the AM-Helper signal is selected when the switching signal SH is high and the AM-Helper signal AM-Helper is selected. Composite video signal CVBS including a switch for selecting and outputting CVBS + AM-Helper to the helper signal processing means and an AM-helper signal AM-Helper outputted from the switch when the switching signal SH is low. And a switch for selecting the luminance signal (Y) and outputting it to the first delay means when the signal is high, wherein the helper signal processing device for PALplus V-CAL is configured.