KR100189903B1 - Pal plus signal recording device - Google Patents

Abstract

The present invention relates to a recording apparatus capable of recording a PAL PLUS signal that is currently being broadcasted in Europe. The helper is a signal obtained by equilibrating not only the luminance signal and the color signal but also the luminance signal by the BY phase of the color subcarrier. An apparatus for recording an arm-plus video signal including a signal on a predetermined recording medium, comprising: signal input means for inputting an arm-plus video signal through a video input terminal; Automatic gain control means for correcting and outputting the level of the input video signal; Signal separation means for generating a luminance signal and a color signal from which the helper signal is removed from the video signal output from the automatic gain control means; And mixing amplification means for mixing the luminance signal and the color signal from which the helper signal is removed to generate a signal to be recorded on a recording medium. According to the present invention, by removing and recording a helper signal from an arm-plus signal, or demodulating and recording a helper signal included in the arm-plus signal into a frequency band of a luminance signal, the arm-plus using a general arm signal recorder. The advantage is that you can also record and play back signals.

Description

PAL PLUS signal recording device

1 is a block diagram of an arm-plus signal recording apparatus according to the present invention.

The present invention relates to a recording apparatus capable of recording a PAL PLUS signal which is being broadcast in test in Europe.

Table 1 is a diagram for comparing the configuration of the arm (PAL) signal and the arm-plus signal. Table 1A is a diagram showing the configuration of a PAL signal, and Table 1B is a diagram showing the configuration of an arm-plus signal.

TABLE 1A

TABLE 1B

As shown in Table 1, the arm signal is composed of 576 lines of luminance signal and color signal, while the arm-plus signal is composed of 72 lines of helper signal, 432 lines of luminance signal and color signal, and helper signal. It consists of 72 lines, that is, 576 lines in total. Here, the helper signal is a signal in which the luminance signal is balanced and modulated to the B-Y phase of the color subcarrier, and its signal band is 1.5 MHz to 5 MHz.

Current recorders for arm signals cannot normally record arm-plus signals. The reason is that the helper signal is inserted in the arm-plus signal to improve the image quality and compatibility with the existing television. When the helper signal has a band of about 1.5 MHz to 5 MHz and its size is very small, it is recorded in a general recorder. This is because most of the helper signals are lost.

Accordingly, a first object of the present invention is to provide an arm-plus signal recording apparatus for recording by removing a helper signal from an arm-plus signal.

A second object of the present invention is to provide an arm-plus signal recording apparatus for recording an arm-plus signal normally without any loss of the arm-plus signal.

It is a third object of the present invention to provide an arm-plus signal recording apparatus for selectively recording an arm-plus signal with or without a helper signal with respect to the arm-plus signal.

The arm-plus-signal recording apparatus according to the present invention for achieving the first object includes an arm-plus including a luminance signal and a color signal, as well as a helper signal which is a signal obtained by equilibrating the luminance signal to the BY phase of the color subcarrier. An apparatus for recording a video signal on a predetermined recording medium, comprising: signal input means for inputting an arm-plus video signal through a video input terminal, automatic gain control means for correcting and outputting a level of the input video signal; Signal separation means for generating a color signal from which the luminance signal and the helper signal are removed from the image signal output from the automatic gain control means, and a signal to be recorded on the recording medium by mixing the luminance signal and the color signal from which the helper signal is removed. Characterized in that it comprises a mixed amplification means for.

An arm-plus-signal recording apparatus according to the present invention for achieving the second object includes an arm-plus including a luminance signal and a color signal as well as a helper signal which is a signal obtained by equilibrating a luminance signal to the BY phase of a color subcarrier. An apparatus for recording a video signal on a predetermined recording medium, comprising: signal input means for inputting an arm-plus video signal through a video input terminal, automatic gain control means for correcting and outputting a level of the input video signal; Signal separation means for generating a color signal including a luminance signal and a helper signal from the image signal output from the automatic gain control means, and equilibrating and demodulating the helper signal from the color signal including the helper signal into a frequency band of the luminance signal, The demodulated helper signal is recorded at the helper signal position of the luminance signal output from the signal separation means for recording. Recording luminance signal generating means for generating a degree signal, recording color signal generating means for generating a color signal for recording by removing a helper signal from a color signal including a helper signal output from the signal separating means and the recording luminance signal And mixing amplifying means for generating a signal to be recorded on the recording medium by mixing the recording luminance signal output from the generating means and the recording color signal output from the recording color signal generating means.

An arm-plus signal recording apparatus according to the present invention for achieving the third object includes an arm-plus including a luminance signal and a color signal, as well as a helper signal which is a signal obtained by equilibrating a luminance signal to the BY phase of a color subcarrier. An apparatus for recording a video signal on a predetermined recording medium, comprising: signal input means for inputting an arm-plus video signal through a video input terminal, automatic gain control means for correcting and outputting a level of the input video signal; Signal separation means for generating a color signal including a luminance signal and a helper signal from the image signal output from the automatic gain control means, and demodulation for balancing and demodulating the helper signal from the color signal including the helper signal into a frequency band of the luminance signal. Means for selecting whether or not to record the demodulated helper signal in a luminance signal; Recording luminance signal generating means for recording the demodulated helper signal at a helper signal position in the luminance signal output from the signal separating means to generate a luminance signal for recording, according to selection by the selecting means, the signal separating means Recording color signal generating means for generating a color signal for recording by removing the helper signal from the color signal including the helper signal outputted from the recording signal, and the recording luminance signal and the recording / color signal generating means outputted from the recording luminance signal generating means. And mixing amplification means for generating a signal to be recorded on the recording medium by mixing the recording color signal output from the recording medium.

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

The arm-plus video signal is mostly the same as the arm signal, except that the helper signal is inserted for compatibility with 4: 3 television and 16: 9 television, and the signal bit (signal) indicating the characteristic of the video signal on the 23rd line of the video signal bit). The signal bit indicates eight bits of information such as whether the current signal is an arm-plus signal or an arm signal, whether it is a 4: 3 broadcast or a 16: 9 broadcast, and whether there is a modulated helper signal.

The helper signal is a balanced modulation of the luminance signal on the B-Y of the color subcarrier, and has a frequency band of 1.5 MHz to 5 MHz. Therefore, most of the information may be lost when the signal is recorded as it is. The reason is that the helper signal is transmitted in the color signal band because the 4.43 MHz ± 0.5 MHz bandpass filter is used in the color signal processing, so that information outside this range is lost. In order to prevent this, the helper signal should be changed to the original luminance signal band and recorded, and when reproduced, it should be balanced by the color subcarrier and outputted.

In the present invention, the helper signal inputted to the color signal stage is demodulated back to the original luminance signal and recorded by the luminance signal processing, and further, to prevent distortion of the arm-plus television caused by jitter generated in the recording process. To turn off the color plus indication bits and teletext.

In addition, since the error (helper signal part) occurs at the top and bottom of the screen when the recorded by the arm-plus signal recorder is played by the general recorder, the helper signal can be removed when recording by the arm-plus signal recorder and playing it by the general recorder. Allows the user to remove the helper signal portion.

1 is a block diagram showing the configuration of an arm-plus signal recording apparatus according to the present invention.

The input selector 12 outputs an arm-plus image signal 101 input through the video input terminal VlDEO IN, and the automatic gain control unit 13 corrects and outputs the level of the input image signal. The luminance signal / color signal (Y / C) separator 14 separates an image signal output from the automatic gain control unit 13 into a luminance signal 103 and a color signal 104 and outputs the separated image signal. In order to generate the color signal 123 including the helper signal, the separated luminance signal 103 and the color signal 121 are synthesized, and the synthesized signal and the separated color signal 121 are controlled for the helper signal section. Synthesize according to the signal HW.

The block 30 for generating the helper signal demodulated with the luminance signal is as follows. The balance demodulator 31 balances and demodulates the helper signal from the color signal 127 including the helper signal into the frequency band of the luminance signal, and the low pass filter 32 removes noise from the demodulated signal, and the level corrector 33 The signal generator 141 may generate the demodulated helper signal 141 in the frequency band of the luminance signal by correcting the level of the signal from which the noise is removed. The switch 34 and the transistor 35 can select whether or not to write the demodulated helper signal 141 to the luminance signal. The demodulation helper signal 141 output from the helper signal generation block 30 is recorded at the helper signal position of the brightness signal l09 by the control of the control unit 11, and the brightness signal processor 18 mixes the mixed signal. By 110, a luminance signal 112 for recording is generated. In this way, the helper signal is balanced and demodulated in the frequency band of the luminance signal, and the demodulated helper signal is recorded at the helper signal position of the luminance signal to generate a luminance signal for recording.

The switch 23 generates a color signal 129 from which the helper signal has been removed from the color signal 127 including the helper signal according to the control of the HW signal, and the color signal processing unit 24 performs recording by the signal 129. To generate a color signal 131.

The mixed amplifier l9 mixes and amplifies the luminance signal 112 for recording and the color signal 131 for recording to generate a signal 133 to be recorded on the recording medium, and to the tape through the video head 20. The signal 133 is recorded.

Table 2A to Table 2E show the format of the signal, Table 2A shows the format of the input video signal 101, and Table 2B shows the luminance signal 105 or the Y / C separator l4 input through the superjack. Table 2C shows the format of the luminance signal 103 output from the color signal 125 or the color signal 123 output from the switch 21 input through the superjack, and Table 2D shows the luminance signal processing unit ( The format of the recording luminance signal 112 output from 18) and Table 2E show the format of the color signal 129 output from the switch 23. FIG.

TABLE 2A

TABLE 2B

TABLE 2C

TABLE 2D

TABLE 2E

Referring to the operation of the arm-plus signal recording apparatus according to the present invention having the above configuration is as follows.

The video signal input through the VIDEO IN input terminal is corrected by the automatic gain control unit 13 via the input selector 12. The Y / C separator 14 separates the input video signal into a luminance signal and a color signal, and the separated luminance signal is switched with a luminance signal input from a super jack. In this case, the super H signal is a high signal when a signal is input from the super jack.

The control unit 11 inputs a signal 107 output from the switch 15, detects a signal bit from the signal, and generates a helper one-way signal HW for indicating the helper signal portion, and further, the signal bit of the recorder The color plus indication and teletext bits are set to the color plus and teletext off modes to prevent the error of the television during recording and playback. That is, b6 of the signal bit is a color plus bit, and b8 is a teletext bit, and b6 and b8 are turned off (0) during recording.

The switch 16 replaces the current signal bit with the signal bit generated by the controller. The switch 17 records the helper signal 141 demodulated as the luminance signal in accordance with the HW signal of the control unit 11 at the helper signal position in the input luminance signal 109. The signal 110 is mixed with the recording color signal by the mixing amplifier 19 via the luminance signal processing unit 18, and then the mixed signal 133 is recorded on the tape through the video head 20.

On the other hand, the color signal 121 separated by the Y / C separator 14 mixes the helper signal portion of the video signal according to the HW signal at the switch 21. This mixing generates the original video signal by mixing the luminance signal and the color signal, and then mixes the helper signal portion with the color signal 121 according to the HW signal. This is because the helper signal portion is lost when the Y / C separator 14 separates the luminance signal and the color signal.

The switch 22 selects the color signal 123 separated from the color signal 125 input from the superjack according to the input selection switch and outputs the result 127. The output signal 127 is a color signal including a helper signal, a balance demodulator 31 for demodulating the helper signal to the original luminance signal, a low pass filter 32 in the 5 MHz band for removing noise of the signal, and a signal. The helper signal 141 demodulated to the luminance signal is generated via the level corrector 33 for correcting the level of the signal. The signal 141 is sent to the switch 107. The switch 34 and the transistor 35 are for the user to select whether or not to write a helper signal to the luminance signal. If you want to record on an Arm-Plus recorder and then play it back on a regular recorder, do not record the helper signal in the luminance signal.

The switch 23 removes the helper signal from the input color signal 127, and the signal 129 is input to the color signal processing unit 24, and the color signal 131 and the color signal 131 are input from the mixed amplifier 19. After the luminance signals 112 have been mixed, the mixed signals 133 are recorded on the tape via the video head 20.

As described above, according to the present invention, by removing the helper signal from the arm-plus signal and recording, or by demodulating and recording the helper signal included in the arm-plus signal in the frequency band of the luminance signal, a general arm signal recorder is used. The advantage is that you can also record and play back Arm-Plus signals.

Claims (9)

An apparatus for recording an arm-plus image signal including a luminance signal and a color signal, as well as a helper signal in which a luminance signal is balanced by modulated in the BY phase of a color subcarrier, on a predetermined recording medium, the arm being connected through a video input terminal. A signal input means for inputting a plus video signal, an automatic gain control means for correcting and outputting the level of the input video signal, and a color signal from which the luminance signal and the helper signal are removed from the image signal output from the automatic gain control means. And an amplifying means for generating a signal to be recorded on a recording medium by mixing the signal separating means for generating and the color signal from which the luminance signal and the helper signal are removed. A device for recording an arm-plus image signal including a luminance signal and a color signal as well as a helper signal which is a signal obtained by equilibrating a luminance signal to the BY phase of a color subcarrier on a predetermined recording medium, wherein the arm is connected through a video input terminal. A signal input means for inputting a plus video signal, an automatic gain control means for correcting and outputting a level of the input video signal, and a color signal including a luminance signal and a helper signal from the image signal output from the automatic gain control means. A signal separating means for generating, equilibrating and demodulating a helper signal from a color signal including the helper signal into a frequency band of a luminance signal, and recording the demodulated helper signal at a helper signal position of an output source luminance signal in the signal separating means. Recording luminance signal generating means for generating a luminance signal for recording, and outputting from the signal separating means The recording color signal generating means for generating a color signal for recording by removing the helper signal from the color signal including the helper signal, and the recording luminance signal output from the recording luminance signal generating means and the recording color signal generating means And an amplifying means for mixing the recording color signals to generate a signal to be recorded on the recording medium. 3. The apparatus of claim 2, wherein the signal separation means is included in the separation output means for separating the luminance signal and the color signal from the image signal output from the automatic gain control means, and the image signal output from the automatic gain control means. And a color helper signal generating means for inserting a helper signal into the color signal derived from the separate output means to generate a color signal including the helper signal. 4. The color helper signal generating means according to claim 3, wherein the color helper signal generating means comprises: a signal synthesizing means for synthesizing the luminance signal output from the separate output means and the color signal output from the separate output means, and an image signal output from the automatic gain control means. Control means for generating a control signal for the helper signal section from the color signal; and a color signal output from the separation output means and a synthesis signal output from the signal synthesizing means. And a signal generating means for generating a color signal including a helper signal. 3. The apparatus of claim 2, wherein the recording luminance signal generating means comprises: a helper signal demodulation means for equilibrating and demodulating a helper signal included in a color signal including the helper signal output from the signal separation means into a frequency band of the luminance signal; And a signal generating means for recording the demodulated helper signal output from the helper signal demodulation means at the helper signal position of the luminance signal output from the means to generate a luminance signal for recording. . 6. The signal intensity signal recording apparatus according to claim 2 or 5, wherein the recording luminance signal generating means records the color plus and teletext in the off mode to prevent an error of the TV in the signal bit region of the luminance signal output from the signal separating means. And a recording means (b6 → 0, b8 → 0). 6. The apparatus of claim 5, wherein the helper signal demodulating means comprises: demodulating demodulating the helper signal included in the color signal including the helper signal output from the signal separating means into a frequency band of the luminance signal; And a level correction means for generating a helper signal demodulated in the frequency band of the luminance signal by correcting the level of the signal from which the noise is removed. A device for recording an arm-plus image signal including a luminance signal and a color signal as well as a helper signal which is a signal obtained by equilibrating a luminance signal to the BY phase of a color subcarrier on a predetermined recording medium, wherein the arm is connected through a video input terminal. A signal input means for inputting a plus video signal, an automatic gain control means for correcting and outputting a level of the input video signal, and a color signal including a luminance signal and a helper signal from the image signal output from the automatic gain control means. Signal separation means for generating, demodulation means for balanced demodulation of a helper signal from the color signal including the helper signal into a frequency band of the luminance signal, and selection for selecting whether or not to write the demodulated helper signal to the luminance signal. Means, in accordance with the selection by said selection means, in the luminance signal output from said signal separation means. Recording luminance signal generating means for recording the demodulated helper signal at a helper signal position to generate a luminance signal for recording, and removing the helper signal from the color signal including the helper signal outputted from the signal separating means, thereby recording the color for recording. A recording color signal generating means for generating a signal and a recording luminance signal output from the recording luminance signal generating means and a recording color signal output from the recording / color signal generating means are mixed to generate a signal to be recorded on the recording medium. And an arm-plus signal recording apparatus comprising a mixed amplification means. 9. The apparatus of claim 8, wherein the demodulation means equilibrates and demodulates a helper signal included in a color signal including the helper signal output from the signal separation means into a frequency band of the luminance signal. And a level correction means for correcting a level of the signal from which the noise is removed and generating a helper signal demodulated in a frequency band.