JPH07168555A - Special effect circuit - Google Patents

Abstract

PURPOSE:To provide a special effect circuit by which the deterioration of image quality is not generated in a non-interlaced output and a screen effect is realized an interlace system compatibly with a non-interlace system with respect to the screen effect at the time of displaying image data on a monitor, etc. CONSTITUTION:This circuit has frame momories 1, 2 constituted of odd number memories 3, 5 and even number memories 4, 6 and a double speed conversion part 12 in the screen effect using image data whose numbers of effective scanning lines are odd numbers, and is constituted so that when a vertical directional rolling is performed by using image data A, B stored in frame memories 1, 2, the scanning line data of the line being L=1 of the image data B or A are stored in even number memories 4 or 6 prior to the rolling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a special effect circuit for realizing a screen effect when displaying an image on a monitor or the like.

[0002]

2. Description of the Related Art A conventional interlace special effect circuit is shown in FIG. In FIG. 11, 5
1, 52 are frame memories, 53 is an address controller, 5
Reference numeral 4 is a logic circuit capable of selecting one scanning line data output from the frame memories 51 and 52. Hereinafter, in this conventional example, when the image data A and B are stored in the frame memories 51 and 52, for example, the operation when the image data A is first output will be described.

First, the frame memories 51 and 52 output the odd scan line data AO and BO of the image data A and B in the odd field and the even field of the interlace respectively, and the image data A and B in the even field. The even scan line data AE and BE of B are output. The logic circuit 54 selects the scanning line data AO and AE output from the frame memory 51, and alternately outputs the odd scanning line data AO and the even scanning line data AE for each field. Therefore, if the output of the logic circuit 54 is sent to a monitor,
The image data A can be displayed by interlacing.

Next, the operation for realizing the screen effect will be described. For example, in the case of the wipe effect, the operations of the frame memories 51 and 52 are the same as when the image data A is displayed, and at this time, the image data A and B in the logic circuit 54 are displayed.
Selection is realized, for example, by shifting line by field or pixel by pixel for each field.

In the case of the roll effect, the read addresses of the frame memories 51 and 52 supplied from the address control section 53 are shifted, for example, in units of lines or pixels in units of fields, and the logic circuit 54 adjusts the image accordingly. It is realized by switching the selection of data A and B.

As to other effects, the selection of the image data A and B in the logic circuit 54 and the read addresses of the frame memories 51 and 52 supplied from the address control unit 53 as described above are performed in line units or pixel units. By switching or shifting, various screen effects can be realized.

However, in interlaced display, there is a problem of flicker, and especially when displaying a still image, there is an increasing demand for non-interlaced display without flicker. It was not uncommon for data to be input to a scan conversion device for scan conversion to realize non-interlaced display.

[0008]

However, in the above-mentioned conventional structure, when performing non-interlaced display, even when a still image is displayed, it is regarded as a moving image during the screen effect such as a roll. Inner interpolation is performed. Therefore, the non-interlaced display during the screen effect has a problem that the image quality is significantly deteriorated as compared with the display image at the time of stillness.

In view of the above points, the present invention has an object to provide a special effect circuit which realizes a screen effect without any visual problem while making the interlace system and the non-interlace system compatible without deteriorating the image quality. And

[0010]

In order to achieve the above object, the present invention provides a screen effect using image data having an odd number of effective scanning lines, which is an odd scanning line of image data L.
= 1, 3, 5, ..., 2m + 1 lines of scanning line data, and L = 2, 4, 6, ..., 2m lines of scanning lines, which are even scanning lines of the image data. One of the even number memories for storing data, n frame memories composed of the odd number memory and the even number memories, and the scanning line data output from the n number of frame memories
A pair of double speed conversion units capable of alternately outputting one set of odd scan line data and even scan line data at a double speed;
When performing a vertical roll using the first image data and the second image data stored in the frame memory and the second image memory, respectively, prior to the roll, the first image data is replaced with the first image data. If it is an upward roll to the image data of 2, the scanning line of the line L = 1 of the second image data is stored in the even number memory of the first frame memory storing the first image data. Memorize the data,
Further, in the case of the downward roll from the first image data to the second image data, the even number memory of the second frame memory storing the second image data,
The scanning line data of the line L = 1 of the first image data is stored.

Further, when performing the vertical roll, prior to the roll, the L of the second image data is stored in the even-numbered memory of the first frame memory storing the first image data.
= 1 line scanning line data is stored instead of the first image data, L = 1 line scanning line data of the second image data is added in advance, the number of effective scanning lines is 2m + 2 lines. Used as a vertical direction roll as the image data of the first image data, and the scanning line data of the line L = 1 of the first image data is stored in the even-numbered memory of the second frame memory storing the second image data. Instead of storing it, the second image data is previously stored in the first image data.
The scanning line data of L = 1 line of the image data of 1 is added to the image data of the effective scanning line of 2 m + 2 lines and used for the vertical roll.

[0012]

In the above means, the frame memory is composed of the odd number memory and the even number memory, so that the odd number scanning line data and the even number scanning line data of the image data are output from the frame memory in parallel.

By storing the scanning line data of the line L = 1 of the second or first image data in the even memory of the first or second frame memory prior to the vertical roll. , During the roll, from the odd memory to L of the least significant scan line of the first or second image data.
The scanning line data of L = 1 line of the second or first image data can be output in parallel from the scanning line data of = 2m + 1 line.

Therefore, even during the screen effect, since the scanning line data of 2m + 1 lines required for display for each field are all input to the double speed conversion unit, non-interlaced output without deterioration of image quality becomes possible.

Further, by using the image data having an effective scanning line number of 2 m + 2 lines for the vertical roll, the even or second memory of the first or second frame memory is stored in the even memory of the first or second frame memory prior to the roll. L of the image data of
The operation of storing the scanning line data of one line is unnecessary, and the control of the roll effect can be simplified.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the image data A referred to in this embodiment.
The upward roll from B to B means that the image data A is being displayed on the screen first, and then the image data A moves to the top of the screen when the roll starts, and the image data B is displayed on the screen accordingly. The effect of moving from below. The state of the upward roll from the image data A to B is shown in FIG. In contrast to the downward roll of the image data A to B, the image data A being displayed moves to the bottom of the screen when the roll starts, and the image data B rises accordingly. It is the effect of moving from.

FIG. 1 is a block diagram of a special effect circuit according to the first embodiment of the present invention. In FIG. 1, 1 and 2 are frame memories, 3 and 4 are odd-numbered memories and even-numbered memories constituting the frame memory 1, 5 and 6 are odd-numbered memories and even-numbered memories constituting the frame memory 2, and 7 is frame memories 1 and 2.
An address control unit for supplying an address to the selector, 8 and 9 are selectors, 10 is a logic circuit capable of selecting one of the outputs of the selectors 8 and 9, and 11 is an odd scan line data and an even scan line data of the frame memory 1 and 2 outputs. A set of logic circuits capable of selecting odd scan line data and even scan line data, 12 is a double speed converter, and 13, 14, 15, 16, 17, 18, and 19 are bus lines.

The operation of the present embodiment having the above-described structure will be described. First, in the special effect circuit having the structure shown in FIG. 1, for example, image data A and B each having 1035 effective scanning lines are stored in the frame memory. When data is stored in Nos. 1 and 2, image data is input from the bus line 13 and L = 1, 3, 5, ... Which are odd scanning lines of the image data A and B.
..Odd scanning line data AO and BO of 1035 lines
Are stored in the odd-numbered memories 3 and 5, respectively, and L = 2, 4, 6, ..., 1 which are even scanning lines of the image data A and B.
The even scanning line data AE and BE of the 034 line are stored in the even memories 4 and 6. At this time, if the address of the memory is handled in line units and the scanning line data is stored in order from the 0 address of the memory, 0 to 51 of the odd memory are stored.
All scanning line data can be stored up to 7 addresses and addresses 0 to 516 of the even memory, and the relationship between the memory address and the scanning line data is as shown in FIG.

Referring to FIG. 4, the operation of displaying the image data A in interlace will be described first. First, the address control unit 7 determines that the odd memory 3, 5,
Addresses 0 to 517 are sequentially supplied to the even memories 4 and 6. And from each memory bus lines 14, 16, 1
The scanning line data AO, BO, AE, and BE are output to 5 and 17 in parallel.

At this time, if the selectors 8 and 9 are in the odd field, the odd scan line data A of the bus lines 14 and 16 are selected.
If O or BO is selected and if it is an even field, bus line 1
The even scan line data AE and BE of 5 and 17 are selected and output. The logic circuit 10 selects the scanning line data AO and AE output from the selector 8 and alternately outputs the odd scanning line data AO and the even scanning line data AE for each field. Therefore, if the output of the logic circuit 10 is sent to a monitor or the like, the image data A can be displayed in interlace.

Next, the operation of displaying the image data A in a non-interlaced manner will be described below. First, the operations of the address control unit 7, the odd-numbered memories 3 and 5, and the even-numbered memories 4 and 6 are the same as in the case of interlace. Of the data, the odd scanning line data AO and the even scanning line data AE of the bus lines 14 and 15 are selected for each field and output to the bus lines 18 and 19.

The double speed conversion unit 12 outputs the scanning line data AO and AE of the bus lines 18 and 19 alternately from the odd scanning line data AO of the bus line 18 one line at a time at a double speed.
In this case, the AO 1 line, the AE 2 line, the AO 3 line, ..., The AE 1034 line, and the AO 1035 line are output in this order. Therefore, if the output of the double speed conversion unit 12 is sent to a monitor or the like, the image data A can be displayed in a non-interlaced manner.

Next, the image data A of the vertical roll
The operation when the upward roll from B to B is realized by interlacing will be described. First, prior to the roll, the scanning line data of the line L = 1 of the image data B is stored in the even memory 4 of the frame memory 1 storing the image data A. At this time, the scanning line data is externally stored by the bus line 13, or the scanning line data is read from the frame memory 2 and the data is sent from the bus line 16 to the bus line 13 for storage. Even memory 4 to be stored at this time
Address is 517.

FIG. 5 shows the relationship between the memory address after scanning and the scanning line data. For example, in a roll that moves 4 lines of interlace (8 lines in non-interlace) for each field, if the roll starts from an odd field, the address control unit 7 first First, 4 to 517 addresses are commonly given to the odd-numbered memories 3 and 5 and the even-numbered memories 4 and 6, and then, to the odd-numbered memories 3 and 5, 1 to 4 addresses, the even-numbered memory 4,
6 is given 0 to 3 addresses. Then, in the next even field, 8 to 517 addresses are commonly given to the odd-numbered memories 3 and 5 and the even-numbered memories 4 and 6, and then the odd-numbered memories 3 and 5,
5 to 1 to 8 addresses and even memories 4 and 6 to 0 to 7 addresses.

In the next odd field, first, 12 to 517 are commonly used for the odd memories 3 and 5 and the even memories 4 and 6.
The address is given, then the odd-numbered memories 3 and 5 are given 1 to 12 addresses, the even-numbered memories 4 and 6 are given 0 to 11 addresses, and so on. Up to 517 addresses which store 1035 lines which are scanning lines, common addresses are given to the odd-numbered memories 3 and 5 and even-numbered memories 4 and 6, and from the next address to the odd-numbered memories 3 and 5, from 1 address to even number. Addresses are sequentially given to the memories 4 and 6 from 0 address.

At this time, the bus lines 14, 15,
FIG. 6 shows scanning line data before and after the memory address 517, which is output to 16 and 17.

Next, in the odd field, the selectors 8 and 9 select the odd scanning line data AO and BO of the bus lines 14 and 16 up to the data of the address 517, and select the data of the next address from the bus lines 15 and 17. Even scan line data AE,
Select and output BE. In the even field, 5
Up to the 17th address data, the even scanning line data AE and BE of the bus lines 15 and 17 are selected, and the odd scanning line data AO and BO of the bus lines 14 and 16 are selected and output from the data of the next address.

The logic circuit 10 selects the scanning line data of the image data A output from the selector 8 up to the data of 517 addresses, and selects the scanning line data of the image data B output from the selector 9 from the data of the next address. Output. Therefore, in each field, the scanning line data output from the logic circuit 10 at the switching portion of the image data A and B becomes as shown in FIG. 7, and the upward roll from the image data A to B is realized by interlacing without any visual problem. it can.

Next, the operation for realizing non-interlace will be described. First, the operations of the address control unit 7, the odd-numbered memories 3 and 5, and the even-numbered memories 4 and 6 are the same as in the case of interlace. Line data A
O and AE are selected, and scanning line data BO and BE of the bus lines 16 and 17 are selected from the data of the next address and output to the bus lines 18 and 19.

The configuration of the scanning line data of the bus lines 18 and 19 in the switching portion of the image data A and B at this time is as shown in FIG. During the roll, the double speed conversion unit 12 is shown in FIG.
Up to the data of address 517, the scanning line data shown in FIG.
Alternate one line from the odd scan line data of ..., AO 1033 lines, AE 1034 lines, AO 1
The output is made in the order of the line 035 and the BO 1 line, but the output order is changed from the data of the next address, and the even scan line data of the bus line 19 is changed to the BE 2 line and the BO 3 line. , BE 4 lines, and so on.

Therefore, the scanning line data output from the double speed conversion unit 12 at the switching portion of the image data A and B for each field is as shown in FIG. 9, and the upward roll from the image data A to B is non-interactive with no visual problem. Can be realized in the race.

Further, in the case of the downward roll from the image data A to B, first, prior to the roll, the even number memory 6 of the frame memory 2 storing the image data B stores the L = 1 line of the image data A. Store scan line data. At this time, the scanning line data is externally stored using the bus line 13 or the scanning line data is read from the frame memory 1 and the data is sent from the bus line 14 to the bus line 13 to be stored.

This can be realized by shifting the address supplied from the address control unit 7 in the opposite direction to the upward roll, and changing the logic circuits 10 and 11 and selectors 8 and 9 accordingly.

For screen effects other than the vertical roll, the image data A and B in the logic circuits 10 and 11 are used.
And the read address from the address control unit 7,
By shifting or switching in pixel units or line units, various screen effects such as wipe can be realized in both the interlaced system and the non-interlaced system.

As described above, according to the first embodiment, even during the screen effect, the non-interlaced output is output using the scanning line data of 1035 lines necessary for each field display, so that the image quality is not deteriorated. , The interlace method and the non-interlace method are compatible with each other, and a screen effect without any visual problem can be realized.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram of a special effect circuit according to the second embodiment of the present invention. The same parts as those of the embodiment shown in FIG. In FIG. 2, 20
Is a selector that can select one of the odd scan line data and the even scan line data output from the logic circuit 11.

In the configuration of FIG. 2, the selector 20 has the first
By performing the same control as the selectors 8 and 9 of the first embodiment, the selector 20 can perform the interlaced output similar to that of the logic circuit 10 of the first embodiment, and the same effect as that of the first embodiment can be obtained. .

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 3 is an image data configuration diagram used for a vertical roll according to a third embodiment of the present invention.
In FIG. 3, the scanning line data of the scanning lines 1 to 1035 is the scanning line data of the line L = 1 to 1035 of the image data A, and the scanning line data of the scanning line 1036 is the image data B.
Is scanning line data of the line L = 1.

When the screen effect is performed in the configuration of the special effect circuit of the first embodiment or the second embodiment, the image data used for the vertical roll is known in advance when the screen effect is programmed. There is a case.

For example, if it is an upward roll from image data A to B, at this time, the effective scanning line obtained by adding the image data A to the scanning line data of the line L = 1 of the image data B in advance. Image data of 1036 lines is prepared in the configuration shown in FIG. When the image data A and B are stored in the frame memories 1 and 2, they are stored as shown in FIG. In this case, the odd scanning line data and the even scanning line data may be sequentially stored from address 0 of the memory. When performing the roll, as described in the first embodiment, an address is given from the address controller 7 and the scan line data output from each memory is subjected to the same control to realize the upward roll. .

As described above, according to the third embodiment, during the vertical roll, the operation of writing one line to the even-numbered memory is not required prior to the roll, and the roll effect control can be simplified.

[0042]

As described above, the special effect circuit of the present invention is
The frame memory is divided into an odd number memory and an even number memory, and at the time of vertical roll, the scanning line data for one line of the image data to be rolled is newly stored in the even memory before the roll, so that the screen effect can be achieved. , No interlace output is possible by using the number of scanning lines required for display in each field, and there is no deterioration in image quality. Can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of a special effect circuit according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a special effect circuit according to a second embodiment of the present invention.

FIG. 3 is an image data configuration diagram of a third embodiment of the present invention.

FIG. 4 is a relational diagram of memory addresses and scanning line data according to the present embodiment

FIG. 5 is a relational diagram of memory address and scanning line data immediately before the start of upward roll according to the present embodiment.

FIG. 6 is a memory output scan line data configuration diagram during an upward roll of the present embodiment.

FIG. 7 is a data structure diagram of interlaced output scanning line data during upward roll of the present embodiment.

FIG. 8 is a scanning line data configuration diagram before double speed conversion in the double speed conversion unit of the present embodiment.

FIG. 9 is a data configuration diagram of non-interlaced output scanning lines during vertical roll according to the present embodiment.

FIG. 10 is a diagram showing an upward roll effect.

FIG. 11 is a block diagram of a conventional example.

[Explanation of symbols]

 1, 2 Frame memory 3, 5 Odd memory 4, 6 Even memory 7 Address control unit 8, 9 Selector 10, 11 Logic circuit 12 Double speed conversion unit 13, 14, 15, 16, 17, 18, 19 Bus line

Claims (2)

[Claims] 1. Among the screen effects using image data having an odd number of effective scanning lines, L = which is an odd scanning line of image data.
An odd number memory for storing scanning line data of 1, 3, 5, ..., 2m + 1 lines, and scanning line data of L = 2, 4, 6, ..., 2m lines which are even scanning lines of the image data. An even-numbered memory for storing a frame memory, n frame memories composed of the odd-numbered memory and the even-numbered memory,
The scan frame data output from each of the frame memories has a double speed conversion unit capable of alternately outputting one set of odd scan line data and even scan line data at a double speed; When performing the vertical roll using the first image data and the second image data stored in the memory and the second frame memory, respectively, prior to the roll, the first image data and the second image data are stored. If it is an upward roll to the image data, the second frame is stored in the even-numbered memory of the first frame memory storing the first image data.
Scanning line data of the line L = 1 of the image data is stored, and if the downward roll from the first image data to the second image data is performed, the second image data is stored. The special effect circuit, wherein the scanning line data of the line L = 1 of the first image data is stored in the even-numbered memory of the second frame memory. 2. When performing a vertical roll, prior to the roll, an even number memory of the first frame memory storing the first image data is scanned for the line L = 1 of the second image data. Instead of storing line data, the first
Image data of the second image data L
= 1 line scan line data is used for vertical roll as image data with an effective scan line number of 2m + 2 lines, and an even number memory of the second frame memory that stores the second image data. Instead of storing the scanning line data of the L = 1 line of the first image data, the second image data is previously stored in the scanning line data of the L = 1 line of the first image data. The special effect circuit according to claim 1, wherein the special effect circuit is used as image data having an effective scanning line number of 2 m + 2 lines in a vertical roll.