JPH07236125A - Video signal recording/reproducing device and video signal processor - Google Patents

Abstract

PURPOSE:To obtain visual interchangeability between a full mode and a normal mode on a monitor and to remove the deterioration of resolution by converting a video signal into images with respectively different aspect ratios in accordance with recording and reproducing time. CONSTITUTION:In this video signal recording/reproducing device, a decoding means 1 generates a full mode video signal 1a with an aspect ratio of 4:3 from an input PAL plus signal aa and supplies the signal 1a to a video signal recording/reproducing means 2. Then a reproduced video signal 2a having the vertical resolution of 576 lines is supplied to a monitor 2 corresponding to the full mode and to a letter box converting means 3, which converts each 4 lines into a 3-line signal by a conversion matrix to generate a video signal 3a with an aspect ratio of 16:9 and supplies the signal 3a to a monitor 1 corresponding to the normal mode. Consequently the visual interchangeability of a highly accurate video signal such as a PAL plus signal on the normal mode monitor can be maintained without deteriorating vertical resolution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal recording / reproducing device and a video signal processing device.

[0002]

2. Description of the Related Art EDTV (Extended Definition TV, high resolution T) is compatible with the current broadcasting system (4: 3 aspect ratio image) and improves the shortcomings of the current system.
There is V). And as one of these technologies, PA
There is a so-called "PALplus" system that aims to widen the screen (image having an aspect ratio of 16: 9) in addition to improving the image quality of the L (Phase Alternation by Line) broadcasting system.

Although PALplus has introduced a wide screen display, it is the current broadcasting system of the PAL broadcasting system T.
This is made available for viewing on a V receiver (hereinafter referred to as a current monitor). For this reason, here, image-free portions a2 and a3 are provided above and below the current screen a1 which is a reduced widescreen original image. Widescreen original a
A letterbox method is used to generate (shown in FIG. 5A). However, when an original image a widened by the letterbox method is received by a current monitor with an aspect ratio of 4: 3, the same image b (shown in FIG. 5B) is obtained, but the aspect ratio is 16: 9. When the image is received by the current monitor of No. 3, a wide screen image c (shown in FIG. 5C) in which the vertical resolution is deteriorated is obtained.

While PALplus looks similar on current monitors, PALplus-compatible monitors (aspect ratio 16: 9) have improved such vertical resolution degradation that occurs when receiving images on current monitors with an aspect ratio of 16: 9. Based on the letterbox method described above,
A video signal is transmitted by superimposing an auxiliary signal (hereinafter referred to as a helper signal) for improving the definition of the main signal, which is the wide screen image a1, on the non-image portions a2 and a3 at the top and bottom of the screen. This screen is shown in FIG. 5 (E).

In this way, the monitor also has a TV aspect ratio of 4: 3 (hereinafter referred to as "normal mode") and 1
There were types that corresponded to a TV aspect ratio of 6: 9 (hereinafter referred to as "full mode").

[0006]

However, PALplus
When the s signal is once converted into a full mode signal and handled, there is a problem in terms of visual compatibility. That is, FIG.
There is no problem when the full mode signal is reproduced on the full mode monitor as shown in FIG.
As shown in FIG. 3, when a full mode signal is reproduced on a normal mode monitor, it is compressed in the lateral direction, so that there is no visual compatibility. There is no problem in reproducing the full mode signal on the normal mode monitor as shown in FIG. 7C, but the normal mode signal is displayed on the full mode monitor as shown in FIG. When it is played back, it is compressed vertically, so it was not visually compatible.

Such a drawback occurs when a PALplus signal is recorded by a conventional home VTR (for example, S-VHS (registered trademark) system). First, when the PALplus signal is directly recorded without being decoded, the helper signal is modulated by the color carrier and therefore cannot be accurately transmitted to the reproducing side due to transmission distortion such as phase distortion, gain distortion, and jitter. Therefore, only the main screen signal forming the PALplus signal becomes valid, and the vertical resolution remains at 432 lines when reproduced on a full mode monitor. Incidentally, when reproduced on the monitor in the normal mode, since only the main screen signal is reproduced in the letterbox format, there is no difference from the reception of the ordinary broadcast.

On the other hand, in order to prevent the deterioration of the vertical resolution, when the recording / reproduction is performed after the signal is once converted into the full-mode signal, the full-mode signal is reproduced, so that the vertical resolution is Although there are 576 lines, the normal mode monitor has the drawback of lacking visual compatibility as described above.

Therefore, it is an object of the present invention to provide a video signal recording apparatus and a video signal processing apparatus which is a main part thereof, which solves the above drawbacks.

[0010]

The present invention provides the following configurations in order to solve the above problems.

A first aspect of the present invention transmits a series of high-definition video signals having an aspect ratio different from that of a predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and has the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing an input video signal having a main signal related to the aspect ratio of the video signal and an auxiliary signal containing video additional information, the input video signal being based on the main signal and the auxiliary signal. Decoding means for converting the signal into the first video signal having the different aspect ratio, and recording the first video signal in a recording medium, and reproducing the second video signal having the different aspect ratio from the recording medium. A video signal recording / reproducing device comprising: a video signal recording / reproducing device; and a converting device for converting the reproduced second video signal into a third video signal having an aspect ratio of the predetermined broadcasting system. There is provided an apparatus.

A second aspect of the present invention transmits a series of high-definition video signals having an aspect ratio different from that of the predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and has the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing an input video signal having a main signal related to the aspect ratio of the video signal and an auxiliary signal containing video additional information, the input video signal being based on the main signal and the auxiliary signal. Decoding means for converting the signal into a first video signal having the different aspect ratio by using at least a first conversion matrix, and recording the first video signal on a recording medium, and outputting the different aspect ratio from the recording medium. A video signal recording / reproducing device for reproducing the second video signal, and an aspect ratio of the predetermined broadcasting system using the reproduced second video signal by at least a second conversion matrix. And a converting means for converting the third video signal with is to provide a video signal recording and reproducing apparatus is characterized in that also serves as a as the first transformation matrix and the second transformation matrix.

A third aspect of the present invention transmits a series of high-definition video signals having an aspect ratio different from that of the predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and has the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing an input video signal having a main signal relating to the aspect ratio of the above and an auxiliary signal including video additional information, wherein the main signal relating to the input video signal and the auxiliary signal A first input memory for storing the first input memory, a first conversion matrix for calculating an output of the first input memory and a first coefficient, and an output of the first conversion matrix for storing A decoding unit having a first output memory for outputting a first video signal, and recording the first video signal on a recording medium,
Video signal recording / reproducing means for reproducing a second video signal having a different aspect ratio from the recording medium, a second input memory for storing the reproduced second video signal, and the second input memory Second for computing the output of and the second coefficient
And a second output memory for storing an output of the second conversion matrix and outputting a third video signal having an aspect ratio of the predetermined broadcasting system. A video signal, wherein the first input memory and the second output memory are combined, the first conversion matrix and the second conversion matrix are combined, and the first output memory and the second input memory are combined. A recording / reproducing apparatus is provided.

A fourth aspect of the present invention transmits a series of high-definition video signals having an aspect ratio different from that of the predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and has the predetermined broadcasting system. The input video signal having the main signal relating to the aspect ratio and the auxiliary signal containing the video additional information is converted into the first video signal having the different aspect ratio, and the first video signal of the predetermined broadcasting system. A video signal processing device for converting into a second video signal having an aspect ratio, the first dual-purpose memory also serving as an input memory for storing the input video signal and an output memory for outputting the second video signal, A first conversion matrix for converting the input video signal into the first video signal; and a second conversion of the first video signal into the second conversion matrix.
Second conversion memory which also serves as a first conversion matrix for converting into the second video signal, and an output memory for outputting the first video signal and an input memory for inputting the second video signal The present invention provides a video signal processing device comprising:

[0015]

1 is a block diagram for explaining a first embodiment of the present invention, FIG. 2 is a block diagram of a decoded means,
FIG. 3 is a block diagram for explaining the letterbox converting means, and FIG. 4 is a block diagram for explaining the second embodiment according to the present invention. The first embodiment will be described below with reference to the drawings.

(First Embodiment) In the video signal recording / reproducing apparatus shown in FIG. 1, the PALplus signal aa is supplied to the decoding means 1 through a transmission line (not shown).
The plus signal aa is decoded to generate the first video signal 1a in the full mode (aspect ratio 4: 3), and this signal is supplied to the video signal recording / reproducing means 2.

The decoding means 1 will be described in detail with reference to FIG. The first memory 10 is for storing a main screen signal related to the PALplus signal aa,
Stores only main screen signals. On the other hand, the second memory 1
Reference numeral 1 is for storing only the helper signal related to the PALplus signal aa, and stores only the helper signal. Then, after the first and second memories 10 and 11 store both signals for a predetermined period, the output signals 10a to 10c of three consecutive lines from the first memory 10 are output as the first signals.
Of the helper signals from the second memory 11 and the output signals 11a of the output signals 10a to 10c of the helper signals are supplied to the first conversion matrix 12.

The first transformation matrix 12 is the first coefficient signal 1 generated by the first coefficient generating means 14.
Based on 4a, for example, the arithmetic processing represented by Formula 1 is performed, and based on the main signal of 3 lines and the helper signal of 1 line, 4 lines of signals 12a to 12d are converted. The first coefficient generating means 14 is composed of a ROM or an adaptive type in consideration of motion detection and correlation of preceding and following lines.

[0019]

[Equation 1] Then, after the output signals 12a to 12d are stored in the third memory 13, the first video signal 1a generated by reading in line order is supplied to the video signal recording / reproducing means 2.

The video signal recording / reproducing means 2 corresponds to a known video signal recording / reproducing means using a magnetic disk, an optical disk, a semiconductor memory or the like as a recording medium in addition to a VTR using a magnetic tape as a recording medium. And
The full-mode second video signal 2a having the vertical resolution of 576 reproduced by the video-signal recording / reproducing means 2 is supplied to the full-mode compatible monitor 1 and the letterbox converting means 3.

Here, the letterbox converting means 3 will be described in detail with reference to FIG. The second video signal 2a is once stored in the fourth memory 30, and then output signals 30a to 30d obtained by reading out every four consecutive lines are supplied to the second conversion matrix 31.

Then, the second conversion matrix 31 has the second coefficient signal 3 generated by the second coefficient generating means 33.
Based on 3a, for example, the arithmetic processing represented by Formula 2 is performed, and the signals of 4 lines are converted into the signals of 3 lines 31a to 31c.
Has been converted to. The second coefficient generating means 33 is a ROM
Alternatively, it is configured as an adaptive type that takes into account motion detection and the correlation between front and back lines.

[0023]

[Equation 2] Then, after storing the output signals 31a to 31c in the fifth memory 13, gray or black portions are added to the upper and lower portions of the screen and are read in line order to generate the third video signal 3a. Then, the third video signal 3a is output to the monitor 2 compatible with the normal mode. The third video signal 3a has an aspect ratio of 16: 9 and the upper and lower parts of the screen are gray or black bands, so that the screen of the monitor 2 compatible with the normal mode has no visual distortion. Becomes

In this way, according to the video signal recording / reproducing apparatus in this embodiment, after converting the high definition video signal such as the PALplus signal into the first video signal having the aspect ratio of 16: 9, Since the recording and reproduction are performed, it is possible to reproduce the second video signal 2a without deterioration of the vertical resolution,
Furthermore, the second video signal 2a is sent to the third in the letterbox format.
Since the letterbox conversion means 3 for converting into the video signal of 1 is provided, it is possible to maintain the visual compatibility with the monitor 2 in the normal mode.

(Second Embodiment) In the first embodiment, the decoding means 1 and the letterbox converting means 3 are provided separately and independently. However, if both are common in that the number of lines is converted, it is possible to combine the configurations. Therefore, the second embodiment has a simple configuration,
The purpose is to obtain the same effect as that of the embodiment.

The video signal recording / reproducing apparatus according to the second embodiment comprises a video signal processing means A which also serves as a decoding means 1 and a letterbox converting means 3 and a video signal recording / reproducing means 2. Since the video signal recording / reproducing means 2 is the same as that of the above-mentioned first embodiment, its explanation is omitted.

The video signal processing means A will be described with reference to FIG. 4, in which "first memory 10 and fourth memory 30" and "first conversion matrix 12 and second conversion" in FIGS. The matrix 31 "and the" third memory 13 and the fifth memory 32 "are shared respectively, and the first to fourth selecting means 4 to 7 select the terminal a during recording and the terminal b during reproduction. Is selected. Further, the fifth selecting means 8 switches the output signal depending on the type of monitor, and selects the terminal c when outputting to the monitor 1 corresponding to the full mode,
The terminal d is selected when outputting to the monitor 2 compatible with the normal mode.

At the time of recording when the video signal processing means A operates as the above-mentioned decoder means 1, the first to fourth selecting means 4 to 7 are simply inserted in the decoder means 1 shown in FIG. .

On the other hand, at the time of reproduction which operates as the letterbox converting means 3, the reproduced full-mode second video signal 2a is passed through the third selecting means 6 to the third memory 13
Is supplied to. The fourth memory 13 operates as an output memory at the time of recording, but operates as an input memory here. That is, the output signals 30a to 30d are read from the third memory 13 for every four consecutive lines.

The output signals 30a to 30d are supplied to the first conversion matrix 12 via the second selecting means 5. First and second conversion matrices 12, 3
1 realizes equations 1 and 2, respectively, and both are composed of a multiplier and an adder, and the coefficients supplied to the multiplier are the first coefficient signal 14a and the second coefficient signal 33a. Both can be used because the only difference is in. Then, at the time of reproduction, the signals 31a to 3 are obtained from the first conversion matrix 12.
1c is output and supplied to the first memory 10 via the first selecting means 4.

The first memory 10 operates as an input memory during recording, but operates as an output memory during reproduction. That is, after storing the output signals 31a to 31c in the first memory 10, gray or black portions are added to the top and bottom of the screen and are read in line order to generate the third video signal 3a.

Then, the third video signal 3a is supplied to the fifth selecting means 8 and a monitor using the second video signal 2a and the third video signal 3a supplied from the video signal recording / reproducing means 2. It is selected according to the type and output to a predetermined monitor.

In this way, the decoding means 1 and the letterbox converting means 3 can be used in common to simplify the structure.

In the second embodiment, the video signal processing means A may be a video signal processing device independent of the video signal recording / reproducing device, and in such a case, the video signal processing device can be used as an adapter. Therefore, there is an effect that it is not necessary to change the conventional video signal recording / reproducing apparatus.

Incidentally, in the above-described second embodiment, the shared structure is the first memory 10, the fourth memory 30, and the first memory 10.
Transformation matrix 12 and second transformation matrix 3
Of course, it is not necessary to use all of the first and third memories 13 and the fifth memory 32, and it is possible to use some of them.

[0036]

As described above, according to the configuration of the present invention described in claim 1, the decoding means for converting the input video signal into the first video signal having a different aspect ratio based on the main signal and the auxiliary signal. And a video signal recording / reproducing means for recording the first video signal on the recording medium and reproducing the second video signal having the different aspect ratio from the recording medium, so that the full-mode signal can be recorded / reproduced. For the second
Is effective in that the vertical resolution is not deteriorated when the video signal is reproduced on a full-mode monitor, and the reproduced second video signal is a third video signal having an aspect ratio of the predetermined broadcasting system. Since the third video signal can be supplied to the monitor in the normal mode because it also has a conversion means for converting to, there is an effect that the visual compatibility can be maintained.

According to the configuration of the present invention described in claim 2 as described above, in addition to the effect of the invention described in claim 1, both the first conversion matrix and the second conversion matrix are used in common. Since it has a configuration, there is an effect that it can be a simple device.

According to the configuration of the present invention described in claim 3 as described above, in addition to the effect of the invention described in claim 2, not only the first conversion matrix and the second conversion matrix, Since the first input memory and the second output memory and the configuration in which the first output memory and the second input memory are also used are provided, there is an effect that the configuration of the device can be greatly simplified.

Further, as described above, according to the configuration of the present invention described in claim 4, since it is possible to provide the video signal processing device which also serves as the main part of the decoding means and the converting means, the aspect ratio can be reduced with a simple configuration. By using the conventional video signal recording / reproducing apparatus, it is possible to output a video signal which has the effect of being able to be converted and which has visual resolution compatibility to a monitor corresponding to various aspect ratios without deterioration of vertical resolution. There is an effect.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a first embodiment according to the present invention.

FIG. 2 is a block diagram of a decoding means.

FIG. 3 is a block diagram for explaining letterbox conversion means.

FIG. 4 is a block diagram for explaining a second embodiment according to the present invention.

FIG. 5 is a diagram for explaining a PALplus signal.

FIG. 6 is a diagram for explaining a screen on a monitor of video signals in a normal mode and a full mode.

[Explanation of symbols]

1 Decoding Means 2 Video Signal Recording / Reproducing Means 3 Letter Box Converting Means (Converting Means) 10, 11 First and Second Memories (First Input Memories,
First combined memory) 12 First conversion matrix (combined conversion matrix) 13 Third memory (first output memory, second combined memory) 30 Fourth memory (second input memory) 31 Second Conversion matrix 2a 2nd video signal 3a 3rd video signal 1a 1st video signal 14a 1st coefficient signal 33a 2nd coefficient signal aa PALplus signal (input video signal)

Claims (4)

[Claims] 1. A series of high-definition video signals having an aspect ratio different from an aspect ratio of a predetermined broadcasting system are transmitted, and the aspect ratio of the predetermined broadcasting system is compatible with the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing an input video signal comprising a main signal according to (4) and an auxiliary signal containing video additional information, the input video signal being based on the main signal and the auxiliary signal. Decoding means for converting into a first video signal having a different aspect ratio, and a video signal recording for recording the first video signal in a recording medium and reproducing a second video signal having the different aspect ratio from the recording medium. A video signal recording / reproducing apparatus comprising: a reproducing means; and a converting means for converting the reproduced second video signal into a third video signal having an aspect ratio of the predetermined broadcasting system. 2. A series of high-definition video signals having an aspect ratio different from an aspect ratio of a predetermined broadcasting system are transmitted, and the aspect ratio of the predetermined broadcasting system is compatible with the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing an input video signal comprising a main signal according to (1) and an auxiliary signal containing video additional information, wherein at least the input video signal is reproduced based on the main signal and the auxiliary signal. Decoding means for converting to a first video signal having a different aspect ratio by using a first conversion matrix, and second decoding means for recording the first video signal on a recording medium and having the different aspect ratio from the recording medium. Video signal recording / reproducing means for reproducing the video signal, and the reproduced second video signal using at least a second conversion matrix and having an aspect ratio of the predetermined broadcasting system. Of and a converting means for converting the video signal, the video signal recording and reproducing apparatus characterized in that also serves as a as the first transformation matrix and the second transformation matrix. 3. A series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system are transmitted, and the aspect ratio of the predetermined broadcasting system is compatible with the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing an input video signal having a main signal according to the above and an auxiliary signal containing video additional information, the main signal and the auxiliary signal relating to the input video signal being stored. A first input memory, a first conversion matrix for calculating an output of the first input memory and a first coefficient, and an output of the first conversion matrix for storing a first input matrix having a different aspect ratio. Decoding means including a first output memory for outputting a video signal, and a video signal for recording the first video signal in a recording medium and reproducing a second video signal having the different aspect ratio from the recording medium. Record Reproduction means, a second input memory for storing the reproduced second video signal, a second conversion matrix for calculating an output of the second input memory and a second coefficient, and the second Conversion means for storing the output of the conversion matrix of and for outputting a third video signal having an aspect ratio of the predetermined broadcasting system, the first input memory and the second input memory. Output memory, the first transformation matrix and the second transformation matrix,
A video signal recording / reproducing apparatus characterized in that the first output memory and the second input memory are used in common. 4. A series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system are transmitted, and the aspect ratio of the predetermined broadcasting system is compatible with the predetermined broadcasting system. The input video signal including the main signal according to the above and the auxiliary signal including the video additional information is converted into the first video signal having the different aspect ratio, and the first video signal is converted into the first video signal.
Second video signal having a predetermined broadcasting system aspect ratio
A video signal processing device for converting the video signal into a video signal processing device, the first memory having an input memory for storing the input video signal and an output memory for outputting a second video signal, and the input video signal A first conversion matrix for converting into a first video signal, a conversion matrix also serving as a first conversion matrix for converting the first video signal into the second video signal, and the first video signal A video signal processing device, comprising: a second combined memory which also serves as an output memory for outputting the second video signal and an input memory for inputting the second video signal.