JP3077726B2 - Level standard signal addition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates are those which relate to a preferred level standard signal adding equipment to the level control of a high definition video signal.

[0002]

2. Description of the Related Art In recent years, Hi-Vision signals (hereinafter referred to as "HD
Signal ". ), A broadband high-definition video signal having a larger number of scanning lines than a conventional video signal such as an EDTV signal is known. For devices that handle high-definition video signals,
Digital processing is often performed, and the dynamic range is strictly limited in digital processing. Therefore, it is important to manage the amplitude level of a signal.

As a method of managing the amplitude level of a video signal, a method of detecting the amplitude level of a synchronization signal and managing the amplitude level of the video signal based on the detection result has been known.

[0004]

However, in digital processing performed in a device that handles a high-definition video signal, it is possible to perform processing by deleting signals in a vertical blanking period and a horizontal synchronizing signal period in order to save memory and the like. Many. For this reason,
If the level of the high definition video signal is corrected based on the amplitude level of the synchronization signal, there is a problem that accurate level correction cannot be performed.

[0005] Therefore, the present invention provides a equipment for adding a level standard signal to high definition video signal, and an object thereof is occupied become easier amplitude level management of high definition video signal.

[0006]

SUMMARY OF THE INVENTION The present invention provides the following structure to solve the above problems.

A level standard signal adding device for adding a level standard signal representing the amplitude level to a high definition video signal, comprising: identification signal generating means for generating an identification signal for identifying the level standard signal; Level reference signal generating means for generating a level reference signal having a reference level serving as a reference for the amplitude level of the high-definition video signal; and generating a level standard signal by combining at least the identification signal and the level reference signal. a level standard signal generating means, can be displayed Oite screen to enable the scanning lines of the high definition video signal
Line specifying means for specifying a predetermined line having low probability, and the level standard signal is interposed in a predetermined line related to the high-definition video signal specified by the line specifying means. Standard signal addition device.

A level standard signal adding apparatus for adding a level standard signal representing the amplitude level to a high definition video signal, comprising: identification signal generating means for generating an identification signal for identifying the level standard signal; Level reference signal generating means for generating a level reference signal having a reference level serving as a reference for the amplitude level of the high-definition video signal, and an information signal for generating an information signal having predetermined information related to the high-definition video signal generating means, and the level standard signal generating means for generating a level standard signal by synthesizing the at least identification signal and the level reference signal and the information signal, Oite screen on the effective scanning lines of the high definition video signal Less likely to appear on
There a line specifying means for specifying a predetermined line, the level standard signal, wherein the level standard signal interposing a predetermined line of the high-definition video signal identified by said line identification means Additional equipment.

A level standard signal adding device for adding a level standard signal representing the amplitude level to a Hi-Vision signal, comprising: identification signal generating means for generating an identification signal for identifying the level standard signal; Level reference signal generating means for generating a level reference signal having a reference level serving as a reference for the amplitude level, information signal generating means for generating an information signal having predetermined information related to the HDTV signal, and at least the identification signal a level standard signal generating means for generating a level standard signal by synthesizing the said level reference signal and the information signal, the 41,42,557,603,604,112 0 La Lee <br/> down of the HDTV signal Line specifying means for specifying one line or a plurality of lines in the HDTV signal. The level standard signal through it interpolating one line or a plurality of lines according to the level standard signal adding apparatus according to claim.

[0010]

[0011]

FIG. 1 is a block diagram of an example of a level standard signal adding apparatus according to a first embodiment of the present invention, FIG. 2 is a waveform diagram of the level standard signal generated in FIG. 1, and FIG. A waveform diagram of an HD signal for explaining a line to be inserted,
FIG. 4 is a block diagram of another example of the level standard signal adding device according to the first embodiment of the present invention, FIG. 5 is a waveform diagram of the level standard signal generated in FIG. 4, and FIG. 6 is a second embodiment of the present invention. FIG. 7 is a block diagram of a level standard signal adding device according to an example, FIG. 7 is a waveform diagram of the level standard signal generated in FIG. 6, FIG. 8 is a waveform diagram of another level standard signal generated in FIG. 6, and FIG. Third of the invention
FIG. 10 is a block diagram of the level standard signal adding device according to the embodiment, FIG. 10 is a waveform diagram of the level standard signal generated in FIG.
1 is a block diagram of an example of a level standard signal adding device according to a fourth embodiment of the present invention, FIG. 12 is a waveform diagram of a level standard signal generated in FIG. 11, and FIG. 13 is a fourth embodiment of the present invention. Block diagram of another example of the level standard signal adding device, FIG.
4 is a waveform diagram of the level standard signal generated in FIG.
5 is a block diagram of a level standard signal adding device according to a fifth embodiment of the present invention, and FIG. 16 is a block diagram for explaining a system to which the level standard signal adding device according to the first to fifth embodiments is applied. 17 is a block diagram for explaining a magnetic recording / reproducing device to which the level standard signal adding device according to the first to fourth embodiments is applied. Embodiments will be described below with reference to the drawings.

The outline of this embodiment is that a level standard signal having amplitude level information of a high-definition video signal on a predetermined line (effective scanning line) related to a picture signal other than the vertical blanking period of the high-definition video signal Is inserted in place of the picture signal. In particular, the level standard signal has an identification signal for distinguishing it from the picture signal. In this embodiment, an HD signal will be described as an example of a high-definition video signal. (First Embodiment) In FIG. And the line identification means 7. This input HD signal aa is Y, P
Any one of the B and PR signals, which is a signal conforming to the domestic Hi-Vision signal standard, and is a signal converted from the R, G, and B signals by the following equation.

Y = 0.7154G + 0.0721B + 0.2125R PB = 0.5389 (−0.7154G + 0.9279B−0.2125R) PR = 0.6349 (−0.7154G−0.0721B + 0.7875R) Further, the other input of the selection means 6 has a level. The level standard signal 5a is supplied from the standard signal generation means AA. The level standard signal generating means AA includes an identification signal generating means 1, a level reference signal generating means 2, and a level standard signal generating means 5.
The identification signal generator 1 supplies an identification signal 1a composed of, for example, 2 bits to the level reference signal generator 5 and the level reference signal generator 2 outputs, for example, 100, 50, 0%. Level reference signal generating means 5
Supplied to Then, the identification signal 1a and the level reference signal 2a are synthesized by the level standard signal generating means 5 to obtain the level standard signal 5a. As shown in FIG. 2A, the level standard signal 5a is inserted following the horizontal synchronizing signal in the period T1, and the identification signal 1a inserted in the period T2.
And the level reference signal 2 interposed in the subsequent period T3
a. The reason why the identification signal 1a is provided before the level standard signal 5a is to determine whether or not the signal related to the line is a level standard signal based on the identification signal 1a.

On the other hand, the line specifying means 7 separates the vertical synchronizing signal and the horizontal synchronizing signal relating to the input HD signal aa, counts them, and specifies a predetermined line into which the level standard signal 5a is to be inserted. The first selection signal 7a shown in FIG.

The selection means 6 outputs a first selection signal 7a.
During the high level period, the input HD signal aa is selected, and during the low level period, the output HD signal bb obtained by selecting the level standard signal 5a is output to a transmission line (not shown).

Here, the line into which the level standard signal 5a is to be inserted will be described with reference to the waveform diagram of the HD signal shown in FIG. The numbers shown in the figure represent line numbers, and the first line starts from the start of the vertical synchronization signal of the odd field.

The line on which the level standard signal 5a is to be inserted must be determined in consideration of the following points. That is, as described above in the problem to be solved, the vertical blanking period and the horizontal synchronization signal period including the vertical synchronization signal may be deleted by the Hi-Vision device, so it is necessary to insert the level standard signal in the effective scanning line. is there. Also, since the level standard signal is not a picture signal, it is necessary to consider that the monitor has an overscan characteristic of 8% to 10% with respect to all the scanning lines so as not to be displayed on the screen of the monitor.

Therefore, taking these points into consideration, in this embodiment and the embodiments described below, the level standard signal 5a is used.
Are inserted into one or a plurality of lines of 41 to 66 lines, 532 to 557 lines, 603 to 628 lines, and 1095 to 1120 lines of the HD signal.

Since the number of scanning lines that the monitor actually overscans varies for each device, the level standard signal is inserted into scanning lines that are effective scanning lines and are unlikely to appear on the screen. It is more desirable to do.

In a studio standard HD signal, the number of effective scanning lines is 1,035 and the effective picture period is four.
1 line to 557 line and 603 line to 1120 line. On the other hand, in the MUSE decoder output signal, the number of effective scanning lines is 1032 and the effective picture period is 42.
Line 557 to line 604 and line 1119.

Therefore, 41,557,603,1120
A line and 42,604,55 7 line and the effective scanning lines, and a line having a potential less the conditions appearing on the screen. Therefore, by the line specifying means 7 described above 41,42,557,603,604,112 0
Identifying one line or plural lines of the line, it is desirable interposing a level standard signal 5a in accordance line.
Further, the 41st line and the 603th line are the effective scanning lines of the studio standard HD signal and are not the effective scanning lines of the MUSE decoder output signal. Therefore,
Assuming that the HD signal is not encoded into the MUSE signal, it is desirable that 41 lines and / or 603 lines be specified by the above-described line specifying means 7 and the level standard signal 5a be inserted into such lines.

Now, an application example of the first embodiment will be described with reference to FIGS.
This will be described with reference to FIG. This application example focuses on the horizontal overscan characteristic of the monitor, and uses the level standard signal 5.
The identification signal 1a and the level reference signal 2a relating to a are interposed in a period not displayed on the screen.

For this reason, the level standard signal adding device shown in FIG. 4 is different from that of FIG. 1 in that timing generating means 8 is newly provided.
On the basis of the first selection signal 7a shown in (B), a second selection signal 8a shown in (C) is generated and supplied to the selection means 6. Note that the second selection signal 8
a is a signal which becomes high level during a period T2 not displayed in the screen where the identification signal 1a is inserted and a period T3 which is not displayed in the screen where the level reference signal 2a is inserted, and becomes a low level in other periods.

The selection means 6 outputs a second selection signal 8
During the period when a is at the high level, the level standard signal 5a is selected, while during the period when the a is at the low level, the output HD signal bb shown in FIG. Supplying to transmission line.

According to this application example, the identification signal 1 related to the level standard signal 5a is set within the horizontal overscan period.
a and the level reference signal 2a can be interposed,
The level standard signal 5a can be inserted into any line within the effective scanning line.

(Second Embodiment) The second embodiment differs from the first embodiment in that an information signal generating means 3 is newly provided in the level standard signal generating means AA, and the information signal 3a is included in the level standard signal 5a. Are time-division multiplexed. Hereinafter, FIGS. 6 and 7
The level standard signal adding device according to the second embodiment will be described with reference to FIG. 1. However, the same components as those in FIG.

The information signal 3a output from the information signal generating means 3 in the level standard signal generating means AA is 0%, 100%.
It is a binary signal of the% level, and is inserted in the period T4 in the level standard signal 5a shown in FIG.

The level standard signal 5a is shown in FIG.
The input HD signal a may be the signal shown in FIG.
When a is a Y signal, as shown in FIG. 3A, the identification signal 1a and the information signal 3 inserted after the horizontal synchronizing signal related to the period T1 and inserted between the periods T2 and T4.
a and a level reference signal 2a interposed in a period T3 following this.

The identification signal 1a and the information signal 3a inserted in the periods T2 and T4 are composed of, for example, 84 bits.
As shown in FIG. 4C, an 8-bit postamble, an 8-bit identification signal, a 36-bit data signal, a 28-bit input HD signal aa-related time code signal, and an 8-bit check code Depending on the traffic light,
These signals set the high level to the 75% level and the low level to the 25% level. The data signal includes information related to an image display format (for example, whether or not a squeeze signal and a letterbox signal are present), information related to an audio mode (for example, discrimination between mono, stereo, and two languages), information related to a program ID, and captions. , And predetermined information related to the input HD signal aa, such as information related to editing and information related to editing.

The period T3 following the periods T2 and T4 is a period corresponding to the above-described 8-bit period, and the reference level of the level reference signal 2a is set to the same 75% level as the above-mentioned high level. I have.

On the other hand, the input HD signal aa is a PB signal, PR
If the signal is a color difference signal such as a signal, the level standard signal 5a
As shown in FIG. 3B, the signal is inserted following the horizontal synchronization signal for the period T1, the information signal 3a is inserted for the period T4, and the level reference signal 2a is inserted for the subsequent period T3. Note that the identification signal 1a is omitted here because the PB signal,
This is because whether or not the level standard signal is inserted in the line can be identified by the identification signal 1a inserted in the Y signal transmitted simultaneously with the PR signal.

Here, the high level of the information signal 3a is 25%
For the level, the low level is set to the -25% level, and the reference level of the level reference signal is also set to have a ± 25% level.

As described above, the identification signal 1a, the level reference signal 2a, and the information signal 3a are time-division multiplexed in the level standard signal 5a. Can be transmitted, and the transmission efficiency of the information can be improved. Further, the information signal 3a multiplexed in the level standard signal 5a is not deleted even by a high-vision device which performs processing by deleting signals in the vertical blanking period and the horizontal synchronizing signal period. Can transmit information. Further, identification signal 1
a can identify not only the level reference signal 2a but also the information signal 3a.
a and the level reference signal 2a are multiplexed, and the information transmission efficiency can be improved as compared with the case where the identification signal 1a and the information signal 3a are multiplexed and transmitted on other lines.

(Third Embodiment) The third embodiment differs from the first embodiment in that the level reference signal 2a and the information signal 3a are shared. This will be described with reference to FIGS. The same components as those in FIGS. 1, 4, and 6 are denoted by the same reference numerals, and description thereof will be omitted.

The level standard signal generating means A shown in FIG.
In A, 100% from the level reference signal generating means 2
And a level reference signal 2a representing a 0% level reference level
Is supplied to the information signal generating means 3a, where the information signal 3a having the binary reference level is generated, and this signal is supplied to the level standard signal generating means 5, where the level standard signal 5a is selected. To supply.

As shown in FIG. 10A, the level standard signal 5a is inserted following the horizontal synchronizing signal relating to the period T1, and the identification signal 1a inserted during the period T2, and the subsequent period T3. The information signal 3a is inserted into T4. Since the high level and the low level of the information signal 3a are the reference levels of 100% and 0%, the signal can also be used as the level reference signal.
The information transmission efficiency can be further improved as compared with the second embodiment.

(Fourth Embodiment) The fourth embodiment differs from the first embodiment in that the identification signal 1a and the level reference signal 2a are shared. This point will be described with reference to FIGS. The same components as those in FIGS. 1, 4, 6, and 9 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 11, an identification level reference signal generating means 4 is provided in the level reference signal generating means AA, which also serves as an identification signal generating means and a level reference signal generating means. The generated identification level reference signal 4a is generated. This identification level reference signal 4
a is, for example, a period T2, T in FIGS. 12 (A) and 12 (B).
As shown in FIG. 3, after the reference level of 50% for a predetermined period, the reference level of 100% is inserted, and then 0%
This is a level interpolated by the reference level.

It is a matter of course that the information signal generating means 3 shown by a dashed line is provided in the level reference signal generating means AA to time-division multiplex the identification level reference signal 4a and the information signal 3a. , In which case the level standard signal 5
“a” is a signal illustrated in FIG. Note that the first selection signal 7a is a signal illustrated in FIG. In this way, the identification signal 1a and the level reference signal 2a are shared, so that the information transmission efficiency can be improved.

In the fourth embodiment, as in the application of the first embodiment, attention is paid to the horizontal overscan characteristic of the monitor, and the identification level reference signal 4a related to the level standard signal 5a is not displayed on the screen. May be inserted into
This will be described with reference to FIGS.

FIG. 13 differs from FIG. 11 in that timing generation means 8 is provided at the subsequent stage of the line identification means 7 and the selection means 6 is controlled by the second selection signal 8a generated thereby. That is, FIG.
A second selection signal 8a shown in FIG. 7C is generated from a first selection signal 7a shown in FIG. And
The selecting means 6 selects the level standard signal 5a while the signal is at the high level, and selects the input HD signal a during the low level.
The output HD signal b shown in FIG.
b is output to a transmission line (not shown).

(Fifth Embodiment) In the first to fourth embodiments described above, the reference level of the level reference signal 2a or the identification level reference signal 4a is a predetermined level, and the level of the input HD signal aa is It was assumed that the amplitude level was normal.

However, there is a case where the input HD signal aa is supplied to the level standard signal adding device through an analog process which does not delete the synchronizing signal of the signal cable, the amplifier, the distributor, etc. In such a case, the analog process is generated. A level standard signal adding device which considers an error in the amplitude level is desired.

Therefore, in the fifth embodiment, the level of the synchronizing signal is detected, and the reference level is varied based on the detected level, thereby solving the above problem. Hereinafter, using FIG.
An embodiment will be described. It should be noted that FIG.
The same components as those in 6, 9, 11, and 13 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 14A, the input HD signal aa
Is supplied to the sync level detecting means 9 where the input HD
The horizontal synchronizing signal related to the signal aa is separated, and its amplitude level is detected to generate the control signal 9a. Then, the control signal 9a is supplied to the level reference signal generating means 2 or the identification level reference signal generating means 4 in the level standard signal generating means AA, where the level reference signal having the reference level set based on the control signal 9a is provided. 2a or the identification level reference signal 4a. In addition, FIG.
Although this corresponds to an application example of the embodiment, in this case also, the sync level detecting means 9 and the level standard signal generating means AA perform the same operations as in FIG.

The level standard signal 5 thus obtained
Since a is inserted into a predetermined line by the selection means 6, the output HD signal bb becomes a signal having the level standard signal 5a based on the amplitude level of the synchronization signal. When the input HD signal aa is supplied to the level standard signal adding device via a process that does not delete the synchronization signal, the output HD signal bb can be generated in consideration of an error in an amplitude level generated in the process.

(Sixth Embodiment) The sixth embodiment relates to a level standard signal adding system to which the level standard signal adding device according to the first to fifth embodiments is applied. Referring to FIG. 16, a MUSE signal 10a is supplied to a MUSE decoder 10 from a transmission line (not shown), and the MUSE signal 10a is converted into an input HD signal aa. The output HD signal bb supplied to the standard signal adding device 30 and obtained by inserting a level standard signal into a predetermined line of the input HD signal aa is output to a transmission line (not shown). Here, the predetermined line into which the level standard signal is inserted may be 41 lines and / or 603 lines as described in the first embodiment. Further, needless to say, the MUSE decoder 20 may be an MUSE decoder 20 in which the MUSE decoder 20 and the level standard signal adding device 30 are integrated.

In the first to sixth embodiments described above,
An identification signal detecting means for supplying the input HD signal aa to the level standard signal adding device 30 is newly provided.
It detects whether or not an identification signal is present on a predetermined line of the signal aa, and controls the first and second selection signals 7a and 8a to insert the level standard signal only when the identification signal is not detected. Of course, it is also good.

(Seventh Embodiment) The seventh embodiment relates to a magnetic recording / reproducing apparatus to which the level standard signal adding apparatus according to the first to fourth embodiments is applied. 17, an input HD signal aa is supplied from a transmission line (not shown) to the identification signal detection means 30 and the level correction means 31, and the identification signal detection means 30 outputs the level standard signal 5a to the input HD. Whether or not the signal is inserted into the signal aa is determined by detecting the identification signal 1a. Then, when the identification signal 1a is detected, a detection signal 30a which becomes high level and becomes low level when it is not detected is obtained, and this signal is supplied to the level correction means 31 and the selection means 32. .

The level correction means 31 outputs the detection signal 30
When a is at a high level, the amplitude level of the input HD signal aa is corrected to a normal amplitude level based on the level standard signal 5a inserted in the input HD signal aa, while the detection signal 30a is at a low level Input HD signal a based on the amplitude level of the horizontal synchronization signal related to the input HD signal aa.
An output signal obtained by correcting the amplitude level of “a” to the normal amplitude level is supplied to one input of the level standard signal adding device 20 and one input of the selecting means 32.

The level standard signal adding device 20 includes first to first
As described above in the fourth embodiment, the level correcting means 31
A signal obtained by adding a level standard signal to a predetermined line related to the output signal of (1) is supplied to the other input of the selecting means 32.

The selection means 32 selects the output signal of the level correction means 31 when the detection signal 30a is at the high level (there is a level standard signal), and selects the output signal at the low level (there is no level standard signal). The signal obtained by selecting the output signal of the signal adding device 20 is converted into a video signal record processing means 3
The recording signal obtained by performing a known recording process such as FM modulation is supplied to a rotary magnetic head H via a recording amplifier 34 for amplifying the recording signal to a predetermined recording level. doing.

As described above, according to the magnetic recording apparatus of this embodiment, when a level standard signal is inserted, a signal obtained by performing a level correction based on the level standard signal is recorded. When the level standard signal is not inserted, the level standard signal can be added to the signal that has been subjected to the level correction based on the horizontal synchronization signal and then recorded, so that the level standard signal is always recorded. There is an effect that a magnetic recording medium can be created.

[0054]

As described above, according to the level standard signal adding apparatus of the present invention, the level standard signal having at least the identification signal and the reference level signal is inserted into the predetermined line related to the effective scanning line. High-definition video signal can be obtained, so that the high-definition video signal is supplied to a high-definition video signal device that performs processing by deleting signals in the vertical blanking period and the horizontal synchronization signal period. The level standard signal is not deleted, and the level management of the high definition video signal can be easily performed based on the level standard signal. Further, since the level standard signal has the identification signal, when performing the level correction of the high-definition video signal, the level correction can be reliably performed without mistaking the picture signal and the level standard signal. There is an effect that a high definition video signal can be provided.

According to the level standard signal adding apparatus of the present invention as described above, in addition to the above-described effects, an information signal having predetermined information relating to a high definition video signal is multiplexed into the level standard signal. Since the transmission can be performed while transmitting the information, there is an effect that the transmission efficiency of the information can be improved. Also,
The information signal is not deleted by the high-definition video signal device which performs processing by deleting the signal in the vertical blanking period and the horizontal synchronizing signal period, so that the predetermined information can be transmitted reliably. Further, since the identification signal can identify not only the level reference signal but also the information signal, the identification signal and the level reference signal 2a are multiplexed on one line, and the identification signal and the information signal are multiplexed on another line. This has the effect that the information transmission efficiency can be increased as compared with the case where the data is transmitted.

Furthermore, according to the level standard signal adding apparatus according to the configuration of the present invention as described above, one line or more lines of the 41,42,557,603,604,112 0 line of the HDTV signal Since the level standard signal can be interpolated, even if the overscan characteristics of the monitor vary, a high-quality HDTV signal in which the level standard signal is not displayed on the screen,
In addition, there is an effect that a high-definition signal having a level standard signal whose level management is easy can be generated.

[0057]

[Brief description of the drawings]

FIG. 1 is a block diagram of an example of a level standard signal adding device according to a first embodiment of the present invention.

FIG. 2 is a waveform diagram of a level standard signal generated in FIG.

FIG. 3 is a waveform diagram of an HD signal for explaining a line on which a level standard signal is inserted.

FIG. 4 is a block diagram of another example of the level standard signal adding device according to the first embodiment of the present invention.

FIG. 5 is a waveform diagram of a level standard signal generated in FIG. 4;

FIG. 6 is a block diagram of a level standard signal adding device according to a second embodiment of the present invention.

FIG. 7 is a waveform diagram of a level standard signal generated in FIG. 6;

FIG. 8 is a waveform diagram of another level standard signal generated in FIG. 6;

FIG. 9 is a block diagram of a level standard signal adding device according to a third embodiment of the present invention.

FIG. 10 is a waveform diagram of a level standard signal generated in FIG. 9;

FIG. 11 is a block diagram of an example of a level standard signal adding device according to a fourth embodiment of the present invention.

FIG. 12 is a waveform diagram of a level standard signal generated in FIG. 11;

FIG. 13 is a block diagram of another example of the level standard signal adding device according to the fourth embodiment of the present invention.

FIG. 14 is a waveform diagram of the level standard signal generated in FIG.

FIG. 15 is a block diagram of a level standard signal adding device according to a fifth embodiment of the present invention.

FIG. 16 is a block diagram for explaining a system to which the level standard signal adding device according to the first to fifth embodiments is applied.

FIG. 17 is a block diagram for explaining a magnetic recording / reproducing device to which the level standard signal adding device according to the first to fourth embodiments is applied.

[Explanation of symbols]

Reference Signs List 1 identification signal generating means 2 level reference signal generating means 3 information signal generating means 5 level standard signal generating means 7 line specifying means 1a identification signal 2a level reference signal 3a information signal 5a level standard signal aa input HD signal (high definition video signal , High-vision signal) bb output HD signal (high-vision signal)

Claims (3)

(57) [Claims] 1. A level standard signal adding device for adding a level standard signal representing an amplitude level to a high-definition video signal, comprising: identification signal generating means for generating an identification signal for identifying the level standard signal; Level reference signal generating means for generating a level reference signal having a reference level serving as a reference for an amplitude level of the high-definition video signal; and synthesizing at least the identification signal and the level reference signal to generate a level standard signal. A level standard signal generating means for generating, and a line specifying means for specifying a predetermined line which is less likely to be displayed on a screen in an effective scanning line of the high-definition video signal, and which is specified by the line specifying means. The level standard signal adding device, wherein the level standard signal is inserted into a predetermined line related to the high definition video signal. 2. A level standard signal adding device for adding a level standard signal representing the amplitude level to a high definition video signal, comprising: identification signal generating means for generating an identification signal for identifying the level standard signal; Level reference signal generating means for generating a level reference signal having a reference level serving as a reference for the amplitude level of the high definition video signal; and generating an information signal having predetermined information related to the high definition video signal. Information signal generating means; level standard signal generating means for generating at least the identification signal, the level reference signal, and the information signal to generate a level standard signal; and on a screen in an effective scanning line of the high definition video signal. Line specifying means for specifying a predetermined line that is unlikely to be displayed on the display, and a predetermined line related to the high-definition video signal specified by the line specifying means. Level standard signal adding apparatus according to claim the level standard signal interposing the emission. 3. A level standard signal adding device for adding a level standard signal representing the amplitude level to a Hi-Vision signal, comprising: identification signal generating means for generating an identification signal for identifying the level standard signal; Level reference signal generating means for generating a level reference signal having a reference level serving as a reference for the amplitude level of the signal; information signal generating means for generating an information signal having predetermined information related to the Hi-Vision signal; Level standard signal generating means for generating a level standard signal by synthesizing the signal, the level reference signal, and the information signal; and 41, 42, 557, 603, 6 of the HDTV signal
04,112 0 La and a line specifying means for specifying one line or more lines of the ins interposed the level standard signal in one line or a plurality of lines according to the HDTV signal identified by said line identification means A level standard signal adding device.