JPH0832928A - Hd signal recorder - Google Patents

Abstract

PURPOSE:To record high-definition TV signals of different standards on a recording medium by the same recorder. CONSTITUTION:The number of frame effective lines, the number of frame total lines and the filed frequency are set at 1080, 1125 and 60Hz respectively for an HD signal A together with 1035, 1125 and 60Hz set for an HD signal B, 960, 1050 ad 60Hz set for an HD signal C, and 1152, 1250 and 50Hz set for an HD signal D respectively. Then these signals A-D are inputted and decided by an input deciding circuit 21. The number of lines included vertically in a single screen is changed for the signal A by a line conversion circuit 23 so that the number of lines of the signal A is equal to that of the signal B. The signals A/B and C/D have different pixels per frame. However these different pixels are equal to each other in the over-scan ranges of frame transmission ranges of both signals C and D. Then the data are compressed and recorded on a magnetic tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an HD for recording a plurality of types of HD television signals of different standards on a magnetic tape by digitizing them with a common circuit configuration and compressing the data.
The present invention relates to a signal recording device.

[0002]

2. Description of the Related Art FIG. 9 shows an example of the configuration of a conventional HD signal recording apparatus for compressing a television signal and recording it on a magnetic tape. In the figure, the HD signal recording apparatus digitally outputs an HD signal (luminance signal (hereinafter referred to as Y signal) and two color difference signals (hereinafter referred to as C1 signal and C2 signal)) input to an input terminal 1. The sampler 2 for converting the sampled HD signal into pixels in a frame is arranged for each macro block composed of 16 lines × 16 pixels for Y signal and 8 lines × 8 pixels for C1 signal and C2 signal, respectively. A shuffling circuit 3 for changing, a frame memory 4 for storing frame data when the HD signal is shuffled by the shuffling circuit 3, an orthogonal transformation, a quantization, and a variable length code of a block signal output from the shuffling circuit 3. Turn into
It has a compression circuit 5 for compressing a fixed number of blocks of data into a fixed amount of data, and a recording circuit 6 for recording the compressed signal on a magnetic tape 9. The recording circuit 6 includes an ECC circuit 8 for error-correcting and encoding a compressed signal, a modulation circuit 9, and a rotary cylinder 10 on which a recording head is mounted, a cylinder driver 11 for rotationally driving the rotary cylinder 10, and a magnetic tape. 7 is a tape running driver 12 for running. Here, as shown in FIG. 10, the shuffling circuit 3 divides a screen of one frame in the horizontal direction into, for example, five equal parts and divides the divided parts into five areas I to V, and the vertical areas defined for each of the divided areas. The same number of macroblocks are taken from the positions offset in the direction to form one coding unit. By this method, the correlation of the data in the coding unit is weakened, and it is possible to prevent the data length of the coding unit process from varying for each coding unit. This method is an extremely effective method for high-efficiency coding of high-definition television signals.

On the other hand, as a high-definition television signal, the number of scanning lines and the field frequency are 1125 lines /
60Hz (1125 signal below), 1050 lines / 60H
There are three types of standards: z (hereinafter 1050 signals) and 1250 lines / 50 Hz (hereinafter 1250 signals).

In order to record such three types of high definition television signals with the same circuit configuration, it is necessary to configure the shuffling circuit as shown in FIG. Ie 105
In the case of 0 signal and 1250 signal, the number of pixels in the horizontal direction is the same, so the number of macroblocks in the horizontal direction is also the same. Therefore, when performing shuffling, it is read from the memory of the macroblock extracted from the divided area. Address control within the vertical shuffling range in the vertical direction and changing the offset value of the vertical address are sufficient. However, in the case of the 1125 signal, the number of macroblocks in the horizontal direction and the number of macroblocks in the vertical direction are inconsistent with the two standards, so that these two standards and the read control from the memory cannot be shared. Therefore, as shown in FIG. 11, an input determination circuit 3a which is connected to the input terminal and determines the standard of the signal is provided, whereby two memory read control circuits 3c and 3d are provided to provide the 1125 signal, the 1050 signal and the 1 signal.
It is necessary to set so that reading from the frame memory 4 is different from that of the 250 signal.

[0005]

[Problems to be Solved by the Invention] However, in this way HD
When the read control circuit is made different for each signal standard, especially for the 1125 signal, the shuffling becomes extremely complicated, so that the circuit scale of the memory read control circuits 3c and 3d becomes large.

There are two types of 1125 signals in the number of lines on which the video information is superimposed, that is, the number of effective frames. One is the number of effective lines for frames called high-definition / total number of lines for frames /
The field frequency is 1035/1125/60 Hz (referred to as HD signal B). The other is an HD signal for HD broadcasting (ATV) in the United States. The horizontal effective area is the same as the HD signal B, but 1080/1125 / 60Hz (called HD signal A), which has 1080 effective frame lines. ). When the HD signal A is recorded by the above device, its frame transmission area becomes the same as the HD signal B.

The 1050 signal has a frame effective line number / frame total line number / field frequency of 960/1050.
/ 60 Hz, which is hereinafter referred to as HD signal C. Again 125
0 signal is the number of effective frames / the total number of lines /
The field frequency is 1152/1250/50 Hz, which is hereinafter referred to as HD signal D.

Here, the frame transmission area is an area that is actually recorded on the magnetic tape, and is a frame effective area of the HD signal standard (area excluding horizontal and vertical blanking periods).
To some extent at least allowed. The reason is that, in general, the TV monitor displays only an area that is somewhat narrower than the frame effective area, and the amount that is not displayed is approximately 5 to 7% (over) in the horizontal and vertical directions relative to the frame effective area. Called the scan rate).

From the above, if the HD signal A is set to the frame transmission area having the same number of pixels as the HD signal B, the number of effective lines of the frame is large, and therefore the entire screen of the TV monitor cannot be displayed unless the overscan rate is 5% or more. Had challenges.

The present invention has been made in view of the above conventional problems, and significantly reduces the effective area for HD signals having different effective line numbers even with different signal forms or the same signal form. It is an object of the present invention to realize an HD signal recording device that can record without changing the circuit configuration.

[0011]

According to the invention of claim 1 of the present application, an HD signal A having a frame effective line number / frame total line number / field frequency of 1080/1125/60 Hz, 1035/112
Multiple types of H with 5 / 60Hz HD signal B, 960/1050 / 60Hz HD signal C or 1152/1250 / 50Hz HD signal D
An HD signal recording apparatus which receives any one of the D signals as an input signal and compresses the data amount of the input signal to record it on a magnetic tape, and a determining means which determines the format of the input signal and outputs determination information. , Sampling means for sampling the input signal at the same sampling frequency regardless of the format of the HD signal, and when the determination means determines the input of the HD signal A, the HD signal
Line conversion means for converting the number of lines only in the upper end portion and the lower end portion of the screen in the frame effective line of the signal A to the same number of frame transmission lines as the number of frame transmission lines of the HD signal B, and line conversion in accordance with the determination information. The HD signal A having the number of frame transmission lines converted by the means is regarded as the same frame transmission area as the HD signal B, and the pixels in the frame transmission areas of the HD signal B, the HD signal C, and the HD signal D are shuffled in block units. The output of the ring means and the shuffling means compresses the data of the same number of blocks so as to have a constant data amount regardless of the format of the HD signal, and the output of the compressing means substantially corresponds to the format of the HD signal. Recording means for recording on the magnetic tape at the same rotational speed of the cylinder and the tape feeding speed of the magnetic tape. It is characterized in that Bei.

According to a second aspect of the present invention, the number of effective frames / the total number of lines / the field frequency is 1080.
/ 1125 / 60Hz HD signal A, 1035/1125 / 60Hz HD signal B, 960/1050 / 60Hz HD signal C, or 1152/1250 / 50Hz HD signal D. An HD signal recording apparatus which receives an input signal, compresses a data amount of the input signal, and records the compressed data on a magnetic tape, and a determination unit which determines a format of the input signal and outputs determination information.
The HD signal A is sampled by the sampling means for sampling the input signal at the same sampling frequency regardless of the signal format and the judging means.
When it is determined that the input is, the signal conversion unit that adds the invalid pixel to the frame transmission area of the HD signal A to make the number of pixels of the same frame transmission area as the frame transmission area of the HD signal D, and the determination information , The HD signal A having the number of pixels converted by the signal converting means is regarded as the same frame transmission area as the HD signal D, and the HD signal B, the HD signal C and the HD signal
The shuffling means for arranging the pixels in the frame transmission area of the signal D on a block-by-block basis and the output of the shuffling means are data-compressed so that the data of the same number of blocks has a constant data amount regardless of the format of the HD signal. The compression means and the HD signal B, HD for the output of the compression means according to the determination information.
The HD signal A and the signal C and the HD signal D have substantially the same cylinder rotation speed and tape feed speed of the magnetic tape.
On the other hand, a recording means for recording on the magnetic tape by increasing the cylinder rotation speed and the tape feeding speed of the magnetic tape to 6/5 times as high as when recording the HD signal D is provided. .

According to a third aspect of the present invention, the number of effective frames / the total number of lines / the field frequency is 1080.
/ 1125 / 60Hz HD signal A, 1035/1125 / 60Hz HD signal B, 960/1050 / 60Hz HD signal C, or 1152/1250 / 50Hz HD signal D. An HD signal recording apparatus which receives an input, compresses the data amount of the input signal and records the compressed data on a magnetic tape, and a determining unit which determines the format of the input signal and outputs determination information, and the input signal is an HD signal B. , The HD signal C and the HD signal D are sampled at the same sampling frequency, and the HD signal A is sampled so that the number of pixels in the frame transmission region is the same as that of the HD signal C. , Shuffling means for rearranging the pixels of the frame transmission area of the HD signal A, HD signal B, HD signal C, and HD signal D in block units according to the determination information, and the output of the shuffling means in the HD signal format Regardless of the same number of blocks of data Compressing means for compressing data so that the data amount is constant, and recording means for recording the output of the compressing means on the magnetic tape at the same cylinder rotation speed and the same tape feeding speed of the magnetic tape regardless of the format of the HD signal. It is characterized by having and.

[0014]

According to the invention of claim 1 of the present application having such a feature, any one of the HD signals A to D as the input signal is judged by the judging means and sampled at a constant sampling frequency. Then, when the HD signal A is input, the number of lines is converted only in the upper and lower end portions of the frame effective area of the HD signal A, in the overscan area on the TV monitor and the area having the least influence on the visual characteristics. Has reduced the vertical resolution of. In this way, the HD signal A is almost HD
It can be the same as signal B. The HD signal B can have the same data amount as the HD signals C and D by reducing the frame transmission area within the overscan range. Therefore, the data other than the video is not displayed on the monitor, and the processing circuit after the shuffling means can compress and record the data by the same processing as the HD signal B.

According to the second aspect of the present invention, invalid signals are added to the HD signal A, the signal is converted into the same number of pixels in the frame transmission area as the HD signal D, and shuffling and compression processing is performed on the HD signals A to D. I do. When recording on the magnetic tape, the recording speed of the HD signal A is 6/5 times the recording speed of the HD signals B to D.
All pixels in the frame effective area of the HD signal A are recorded on the magnetic tape.

Further, in the invention of claims 3 to 5, the sampling frequency of the sampling means is made different between the HD signal A and the HD signals B to D, and the data amount of the output of the sampling means of the HD signal is reduced. There is. Then, recording is performed on the magnetic tape by the recording means via the shuffling means and the compression means. In this way, the number of pixels in the frame transmission area can be made equal to the number of HD signals C without reducing the number of effective frames, so that the processing circuit after compression processing can be made exactly the same as the HD signals C.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An HD signal recording apparatus according to a first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of the first embodiment. In the figure, the input terminal 20 is a terminal for inputting the HD signal A, the HD signal B, the HD signal C or the HD signal D, and the input determination circuit 21 is the HD signal input from the input terminal 20. B, HD signal C or HD signal D, a circuit which determines the determination result and outputs the determination result as determination information p, and the sampler 22 has the same HD signal input from the input terminal 1 regardless of the format. When the HD signal A is input according to the determination information p, the circuit for sampling at the sampling frequency, the line conversion circuit 23 performs line conversion only on the upper and lower end portions of the screen in the frame effective area of the HD signal A, and the frame is converted. This circuit reduces the number of effective lines. The shuffling circuit 24 is a circuit for shuffling the HD signals A or B to D in which the number of lines obtained through the line conversion circuit 23 is converted. Frame memory 4 for HD signals A to B
Then, the HD signal C is recorded differently in the read frame memory in which the number of pixels and the number of lines in the horizontal and vertical directions match, and the reading is performed to perform shuffling. Also, since the constituent elements numbered 4 to 12 in the figure are the same as those in the above-mentioned conventional example, detailed description and operation description thereof will be omitted.

The operation of the HD signal recording apparatus configured as described above will be described. First, the HD signal is input from the input terminal 20. The input determination circuit 21 determines whether the input HD signal is the HD signal A, the HD signal B, the HD signal C, or the HD signal D, and the determination information p
Is output. On the other hand, the sampler 22 uses each H in this embodiment.
In either case of D signal, a constant frequency, here, Y signal is 40.5 MHz, C1 signal and C2 signal are 1 respectively.
Sampling shall be performed at 3.5 MHz. According to this sampling frequency, each frame effective area is
For the Y signal: HD signal A: Horizontal: 1048 pixels Vertical: 1080 lines HD signal B: Horizontal: 1048 pixels Vertical: 1035 lines HD signal C: Horizontal: 1080 pixels Vertical: 960 lines HD signal D: Horizontal: 1080 pixels Vertical: 1152 lines (however) , The field frequency is 6 for HD signals A, B, C
At 0 Hz, the HD signal D is 50 Hz. The two color-difference signals C1 and C2 are horizontally 1/3 the number of pixels of the Y signal, and are vertically line-sequential (the C1 signal is C for each line).
Only one of the two signals) and then 1/2 of the Y signal
The number of lines. )

Here, since the number of pixels in the frame effective area of the HD signal C and the HD signal D is the reciprocal ratio 5: 6 of the field frequency ratio 6: 5, the compression ratio in the compression circuit 5 in the subsequent stage and the recording in the recording circuit 6 are performed. The rate, the cylinder rotation speed, and the tape feeding speed can be made substantially equal. (Actually, the field frequency of the HD signal C is 60 Hz × 1 / 1.001≈59.9.
There is a 0.1% difference at 4 Hz. ) Therefore, HD signal C
Also, the frame transmission area in which the HD signal D can be actually recorded on the magnetic tape 7 is made the same as the frame effective area.

However, although the HD signal B has the same field frequency as the HD signal C, the number of pixels in the frame effective area (1,086,680 pixels for the Y signal) is the number of frame effective pixels for the HD signal (1,036,800 pixels for the Y signal) as described above. ) Will be more than. Therefore, the number of pixels in the frame transmission area of the HD signal B is adjusted as follows so that the number of pixels in the frame transmission area of the HD signal B is approximately equal to that of the HD signal C within the range permitted by the overscan rate of the TV monitor. HD signal B: Horizontal: 1008 pixels Vertical: 1024 lines (Y
signal)

In this way, the number of pixels in the frame transmission area of the HD signal B is 1,032,192 pixels for the Y signal. At this time H
The overscan rate of the D signal B is horizontal: about 3.8%,
Vertical: about 1.1%. The extraction of the frame transmission area is controlled by the shuffling circuit 24 based on the determination information p. FIG. 2 shows the relationship between the frame transmission areas in the shuffling circuit 24 for the HD signal B, the HD signal C and the HD signal D. As shown in FIG. 2A, in the HD signal B, the same processing as that of the HD signal C can be performed by writing the HD signal B in the frame memory 4 so as to move the upper and lower areas to the right area. FIG.
FIG. 4 is a diagram showing the operation of the shuffling circuit 24 when a signal obtained by line-converting the HD signal B or the HD signal A is input, and the screen of one frame is shown as a macro block. Here, the macro block is the Y signal and is 1 in the vertical direction.
6 lines, 24 pixels in the horizontal direction, and each color difference signal has 8 lines in the vertical direction and 8 pixels in the horizontal direction. Figure 3 (a) shows H
The D signal B shows the arrangement of the macro blocks of the input signal, and FIG. 3B shows the arrangement of the macro blocks when the input signal is controlled and written in the frame memory 4. The areas I to V in FIG. 3A are written as shown in FIG. 3B, which is vertically offset by two macroblocks. The remaining upper and lower macroblock areas are shown in FIG.
As shown in FIG. 5, the data is divided and sequentially written in the rightmost block of the areas I to V. In addition, dummy data is written in the empty areas F of the horizontal 3 macroblocks and the vertical 4 macroblocks which have not been input with the write data so far. This area conversion is considered so as to ensure the continuity of the reproduced data on the monitor screen during special reproduction of high-speed search by the reproducing apparatus. That is, in the HD signal B after the area conversion, the continuity between the central area and the right area is lost, but the effect on the visual characteristics is reduced by suppressing the effect of the discontinuity in the upper and lower end areas on the monitor. It is a thing. Further, the memory amount of the frame memory 4 is set to a capacity capable of storing the HD signal D having the largest frame transmission area.

The HD signal A is the same as the HD signal B including the blanking period information (synchronization signal etc.), but its frame effective area is large.
Therefore, if the same as the frame transmission area of the HD signal B, the overscan rate is horizontal: about 3.8%, vertical: about 5.
2%. Since the overscan rate in the vertical direction is slightly higher than 5% as described above, the TV monitor displays information other than the video signal in the upper and lower portions of the monitor.

Therefore, when the HD signal A is input, the line conversion circuit 23 converts the number of lines in the upper and lower regions as shown in FIG. In FIG. 4A, H
D signal A includes 8 lines of the frame effective area 8
Add invalid lines to make 1088 lines,
Line conversion is performed to convert the number of lines to 1/2 for each of 64 lines in the upper screen area and 64 lines in the lower screen area. As a result, the pseudo HD signal B shown in FIG. When such line conversion is performed, the original HD signal A is not converted in the central portion of the screen, which has a great influence on visual characteristics.
The image information is stored as it is, and the area affected by the line conversion can be limited to the upper and lower end areas of the screen. HD signal B
In the above, the area affected during special reproduction can be suppressed to the same upper and lower end areas of the screen. Further, in this embodiment, 1
Since line conversion of / 2 is sufficient, it can be realized with a very simple circuit even if a vertical line filter is used.

As described above, the HD signal recording apparatus of this embodiment performs line number conversion only on the upper and lower ends of the frame effective area of the HD signal A. Therefore T
Only the vertical resolution in the overscan area on the V monitor and the area having the least influence on the visual characteristics is reduced, data other than video is not displayed on the monitor, and processing circuits after the shuffling means are provided. Can be compressed and recorded by the same processing as the HD signal B.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a block diagram of an HD signal recording apparatus which is a second embodiment of the present invention. The HD signal recording device has HD signal A, HD signal B, HD signal C or H.
The input terminal 20 for inputting the D signal D, and the HD signal input from the input terminal 20 are HD signal A, HD signal B, and HD signal C.
Or an HD signal D, and an input determination circuit 21 that outputs the determination result as the determination information p, a sampler 22 that samples the HD signal input from the input terminal 20,
When the HD signal A is input, a signal conversion circuit 3 that adds an invalid pixel to make the same frame effective area as the HD signal D
0, and when the HD signal A is input into the recording circuit 6 by the determination information p, the cylinder drive speed can be increased to 6/5 times as much as when the HD signal D is input. 31 and a tape running driver 32 capable of increasing the tape feeding speed by 6/5 times. The other components are similar to those of the first embodiment shown in FIG. 1, and detailed description thereof will be omitted.

The operation of this embodiment will be described below. The sampler 22 of this embodiment has the same sampling frequency of 40.5 MHz (Y signal) and 1 for the four types of HD signals A to D.
Sampling is performed at 3.5 MHz (each color difference signal). Therefore, the frame effective area of each HD signal is similar to that of the first embodiment. The signal conversion circuit 30 uses the HD signal A
Is input, invalid pixels are added in the horizontal and vertical directions to the frame effective area to make the same frame effective area as the HD signal D of FIG. 2C of horizontal: 1080 pixels and vertical: 1152 lines. The HD signal D has the same frame effective area and frame transmission area. In this embodiment, the processing of the HD signals B and C is the same as in the first embodiment. The shuffling circuit 24 performs the same shuffling operation as the HD signal D even when the HD signal A is input. Since the memory capacity of the frame memory 4 is equal to the frame transmission area of the HD signal D, it is not necessary to add a new memory. Also, the compression circuit 5 operates at the same compression ratio as that of the HD signal D.

However, since the field frequency is 60 Hz for the HD signal A and 50 Hz for the HD signal D, according to the same compression ratio, the data rate after compression is 6 / when the HD signal A is HD signal D. 5 times. Therefore, when it is determined that the HD signal A is input, the cylinder rotation speed is increased to 6/5 by the cylinder driver 31.
In this way, all the compressed data can be recorded on the magnetic tape 7. Further, the tape feed speed is increased to 6/5 times by the tape running driver 32 and the track pitch on the magnetic tape 7 is made the same, so that the magnetic head in the rotary cylinder 10 can be commonly used.

The method of arranging the invalid pixels in the signal conversion circuit 30 may be arranged in the upper, lower, left, and right end areas with respect to the frame effective area of the HD signal A in consideration of special reproduction, but it is not unique. The invalid pixel is appropriate because the pixel value in the non-signal state does not give an unnecessary amount of information due to the compression processing by the compression circuit 5 in the subsequent stage.
It is also effective to duplicate a part of the above and use it as a countermeasure against errors during playback.

As described above, according to the HD signal recording apparatus of this embodiment, all the pixels of the frame effective area of the HD signal A can be recorded on the magnetic tape, and the signal processing circuit is exactly the same as the HD signal D. It can be performed by operation, and the tape pattern on the magnetic tape can be made exactly the same.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a block diagram of an HD signal recording apparatus which is a third embodiment of the present invention. The input terminal 20 is a terminal for inputting the HD signal A, the HD signal B, the HD signal C, or the HD signal D, and is input to the input determination circuit 21. The input determination circuit 21 receives the H input from the input terminal 20.
D signal is HD signal A, HD signal B, HD signal C or HD
It is determined which of the signals D is, and the determination result is output as the determination information p. The sampling device 40 samples the HD signal input from the input terminal 1, and the sampling output is input to the shuffling circuit 41 that operates for each HD signal.

FIG. 7 shows a configuration example of the sampling device 40A in this embodiment. In FIG. 7A, the sampler 40A has a sampling frequency of 40.5 MHz (Y signal) and 13.
An A / D converter 42 for sampling HD signals at 5 MHz (each color difference signal), and a horizontal conversion circuit for reducing the number of horizontal pixels when the HD signal A is input to set the number of horizontal pixels in the frame effective area to 960 pixels. Has 43.
The sampler 3 in the first and second embodiments has only the A / D converter 42. The horizontal conversion circuit 43 is the A / D converter 4
The number of horizontal effective pixels of the HD signal A in the second output stage is 1048 pixels and is converted into 960 pixels by using a band limiting filter. FIG. 8 shows the frame effective area of the HD signal A at that time. This frame effective area is exactly the same as the total number of pixels in the frame effective area of the HD signal C in FIG. 2B, but the number of pixels in the horizontal direction is replaced with that in the vertical direction. Therefore, in the shuffling circuit 41, H
When the D signal A is input, the address control for the frame memory 4 is reversed from the horizontal / vertical address as in the case of the HD signal D. With the above operation, the operations after the compression circuit 5 may be exactly the same in the case of the HD signal A and the HD signal D.

As described above, according to the HD signal recording apparatus of the present embodiment, the number of pixels in the frame transmission area can be made the same as the number of HD signals C without reducing the number of frame effective lines. Can be exactly the same as the HD signal C.

The horizontal pixel conversion in the horizontal conversion circuit 43 is changed from 1048 pixels to 960 pixels, but it is effective to add invalid pixels to convert from 1080 pixels to 960 pixels because the conversion rate becomes simple.

FIG. 7B shows an example of the configuration of another sampling circuit 40B. This configuration example has an A / D converter 44 that performs A / D conversion at the input sampling frequency. Further, the horizontal conversion circuit 43 is not provided, and the sampling frequency is 40.5 MHz and 37.1 MHz for the Y signal according to the determination information p.
A sampling frequency switching unit 45 for switching to any of 25 MHz and outputting to the A / D converter 44 is provided. The sampling frequency of each of the two color difference signals is ⅓ of the Y signal. The sampling frequency and horizontal effective pixel in the studio standard of 1125 signals are 74.2 respectively.
It is 5 MHz and 1920 pixels. Therefore, the number of horizontal effective pixels in FIG. 8 is exactly half of the studio standard.
Sampling frequency is 3 of 1/2 of 74.25MHz
If it is set to 7.125 MHz, horizontal conversion is unnecessary.

Further, although the AD converter is used as the analog signal for the input signal form of the HD signal A in this embodiment, when inputting in the form of a digital signal, the horizontal conversion thereof is converted to 1/2 as described above. The circuit configuration is very simple and highly compatible with studio standards.

[0036]

As described above, according to the HD signal recording apparatus of the invention of claim 1 of the present application, the number of lines is converted only in the upper and lower end portions of the frame effective area of the HD signal A, and the TV monitor is obtained. In the overscan area and the area that has the least effect on visual characteristics, only the vertical resolution is reduced, and data other than video is not displayed on the monitor, and the processing circuit after the shuffling means is HD.
Data can be compressed and recorded by exactly the same processing as the signal B.

With the configuration of the HD signal recording apparatus according to claim 2 of the present application, all the pixels of the frame effective area of the HD signal A can be recorded on the magnetic tape, and the signal processing circuit is HD.
It can be executed in exactly the same operation as the signal D.

With the configuration of the HD signal recording apparatus according to claim 3 of the present application, the number of pixels in the frame transmission area can be made equal to the number of HD signals C without reducing the number of frame effective lines. It can be exactly the same as the HD signal C.

[Brief description of drawings]

FIG. 1 is a block diagram of an HD signal recording device according to a first embodiment of the present invention.

2A is a frame transmission area of an HD signal B, FIG.
(B) is a figure which shows the frame transmission area of HD signal C, (c) is a frame transmission area of HD signal D

3A is a diagram showing a microblock arrangement of an HD signal B, and FIG. 3B is a diagram showing a microblock arrangement when this data is written in a memory.

FIG. 4 is a line conversion operation explanatory diagram for explaining the operation of the line conversion circuit, FIG. 4A is a diagram showing a frame effective area of an HD signal A, and FIG. 4B is a diagram showing a frame effective area of a pseudo HD signal B.

FIG. 5 is a block diagram of an HD signal recording device in a second embodiment of the present invention.

FIG. 6 is a block diagram of an HD signal recording device in a third embodiment of the present invention.

FIG. 7 is a diagram showing a different configuration example of a sampling device in the third embodiment.

FIG. 8 is a frame effective area of the HD signal A in the third embodiment.

FIG. 9 is a block diagram of a conventional HD signal recording device.

FIG. 10 is an explanatory diagram showing shuffling by a shuffling circuit.

FIG. 11 is a block diagram showing a configuration of a shuffling circuit of a conventional HD signal recording device.

[Explanation of symbols]

 3, 24, 41 shuffling circuit 4 frame memory 5 compression circuit 6 recording circuit 7 magnetic tape 20 input terminal 21 input determination circuit 22, 40, 40A, 40B sampler 23 line conversion circuit 30 signal conversion circuit

Claims (5)

[Claims] 1. The number of effective lines of the frame / the total number of lines of the frame / the HD signal A having a field frequency of 1080/1125/60 Hz, the HD signal B of 1035/1125/60 Hz, and the H signal of 960/1050/60 Hz.
An HD in which either the D signal C or the HD signals of different formats of the 1152/1250/50 Hz HD signal D are input signals, and the data amount of the input signals is compressed and recorded on the magnetic tape.
A signal recording device, determining means for determining the format of the input signal and outputting determination information; sampling means for sampling the input signal at the same sampling frequency regardless of the format of the HD signal; When the determination unit determines that the HD signal A is input, the line number conversion is performed only on the screen upper end portion and the screen lower end portion in the frame effective line of the HD signal A, and the same frame number as the frame transmission line number of the HD signal B is transmitted. The HD signal A having the line conversion means for converting the number of transmission lines and the number of frame transmission lines converted by the line conversion means according to the determination information is H.
A shuffling means for arranging the pixels in the frame transmission area of the HD signal B, the HD signal C and the HD signal D in block units, considering the same signal transmission area as the D signal B, and the output of the shuffling means in the HD signal format. Irrespective of the number of blocks, the data of the same number of blocks is compressed so that the data amount is constant, and the output of the compression unit is substantially the same in terms of HD signal format and the tape feed of the magnetic tape. An HD signal recording apparatus comprising: a recording unit that records on a magnetic tape according to a speed. 2. The number of effective frames / the number of all lines / the field frequency is HD signal A of 1080/1125 / 60Hz, HD signal B of 1035/1125 / 60Hz, H of 960/1050 / 60Hz.
An HD signal recording apparatus for inputting any one of a plurality of formats of HD signal D of C signal D or HD signal D of 1152/1250/50 Hz and compressing the data amount of the input signal and recording it on a magnetic tape. There is a determining means for determining the format of the input signal and outputting determination information, a sampling means for sampling the input signal at the same sampling frequency regardless of the format of the HD signal, and the determining means. When it is determined that the HD signal A is input, a signal conversion unit that adds invalid pixels to the frame transmission area of the HD signal A to make the number of pixels in the same frame transmission area as the frame transmission area of the HD signal D, and the determination. The HD signal A having the number of pixels converted by the signal converting means according to the information is regarded as the same frame transmission area as the HD signal D, and the frame transmission of the HD signal B, the HD signal C and the HD signal D is performed. Shuffling means for arranging the pixels of the area in block units, and compression means for compressing the output of the shuffling means so that the data of the same number of blocks has a constant data amount regardless of the format of the HD signal, The output of the compression means is the HD signal B according to the determination information,
The HD signal C records the cylinder rotation speed and the tape feed speed of the magnetic tape at substantially the same cylinder rotation speed and the tape feed speed of the magnetic tape as the HD signal C and the HD signal D. An HD signal recording apparatus, comprising: recording means for recording on a magnetic tape, which is 6/5 times as large as when recording. 3. The number of effective lines of the frame / the total number of lines of the frame / the HD signal A having a field frequency of 1080/1125 / 60Hz, the HD signal B of 1035/1125 / 60Hz, the H of 960/1050 / 60Hz.
An HD signal recording apparatus for inputting either a D signal C or a plurality of HD signals of different formats of an HD signal D of 1152/1250/50 Hz and compressing the data amount of the input signal and recording it on a magnetic tape. Determination means for determining the format of the input signal and outputting determination information; and the input signal being HD signal B, HD signal C and HD signal D.
At the same sampling frequency, sampling means for sampling the HD signal A so that the number of pixels in the frame transmission region is the same as the HD signal C, and, according to the determination information, HD signal A, HD signal B, HD
Shuffling means for arranging the pixels in the frame transmission area of the signal C and the HD signal D in block units, and the output of the shuffling means makes the data of the same number of blocks a constant data amount regardless of the format of the HD signal. And a recording means for recording the output of the compression means on the magnetic tape at the same cylinder rotation speed and the same magnetic tape feeding speed regardless of the format of the HD signal. HD signal recording device characterized by: 4. The sampling means samples at the same 40.5 MHz (for luminance signal) regardless of the format of the HD signal, and H
4. The HD signal recording apparatus according to claim 3, wherein the horizontal pixel number conversion is performed so that the number of horizontal pixels of the D signal A becomes equal to the number of frame transmission lines of the HD signal C. 5. The sampling means samples the HD signal B, the HD signal C, and the HD signal D at the same 40.5 MHz (for a luminance signal) and 37.125 MHz for the HD signal A.
4. Sampling with (for luminance signal).
The described HD signal recording device.