JPS5923975A - Method and device for processing still picture - Google Patents

Abstract

PURPOSE:To perform a roll display in which characters are continuously moved on a television screen by a small-sized device, by picking up the image of still pictures drawn on Telop cards, etc., and reading out video signals in order after they are stored in a storage device. CONSTITUTION:Analogical video signals Vin obtained by picking up the image of character patterns written on the surface of one sheet are inputted into a video processing circuit 200 through an input terminal 100 and converted into signals Vl of a logical level. A writing circuit 300 discriminates each line of the characters of the signals Vl and divides the signals for every line, and then, determines the address of a storage device 500. A switching means 400 performs the input and output into and from the storage device at time division. A reading out circuit 600 reads out the stored contents in the storage device in a fixed order and an output circuit 700 converts the readout contents into video signals Vout which are outputted from an output terminal 800. Since the storage device 500 continuously performs the writing and readout, it must have a capacity equal to two screens.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for processing still images drawn on telop cards and the like.

Conventionally, in television stations, a long screen with a pattern of characters, etc. that should be displayed on one screen is used as a method of performing roll display (displaying rows or columns of characters, etc., on the screen by continuously moving them in a fixed direction). The conventional method was to sequentially feed a roll of paper using a motor, optically image it with a television camera, and send it out. Therefore, as mentioned above, a mechanical device for feeding the roll of paper using a motor was required. Further, preparing a large number of long materials such as rolls of paper depending on the display contents takes up a lot of storage space, and it is not easy to search for the necessary materials. Furthermore, it is not easy to simply convert the content written on a long material into an electrical signal and store it in a storage device for still images.

The present invention has been developed in view of these points, and does not require a large device to mechanically feed long materials as described above, and can be used as a material for a standard-sized caption card with a large number of heads in one line. The present invention aims to provide a method and an apparatus for obtaining a roll display image by applying a pattern drawn by collecting characters, etc.

The present invention will be clarified by describing embodiments of the present invention in detail below using the drawings.

FIG. 1 is a block diagram showing the principle of the invention.

The method and apparatus of the present invention will be outlined below based on FIG.

A pattern of characters, etc. written in multiple lines (or columns) on one sheet surface (for example, standard terror lacquer) (for convenience of explanation, the case of multiple lines of characters will be described below) is imaged by an imaging device such as a television camera. An analog video signal Vin obtained through the input terminal 100 is input to the video signal processing circuit 200 through the input terminal 100. The video signal processing circuit 200 converts the input analog video signal Vln into a signal VIK of logic level μ. The writing circuit 300 identifies each line of characters imaged by the imaging device based on the logic level signal Vt, divides them into signals corresponding to each item, and processes and stores these divided signals. Determine the appropriate address assignment.

The signals divided for each line of the character imaged as described above are stored in the allocated address of the storage device 500 via the switching means 400. Note that the switching means 400 is
Specifically, a common path is used in a time-sharing manner. A readout circuit 600 reads out the contents of the storage device 500 in a predetermined order for roll display on a television screen. This read signal is converted into a video signal Vout by the output circuit 700 and output from the output terminal 800. Based on the signal Vout outputted from the output terminal 800, the plural lines of characters imaged as described above are rolled and displayed on the television screen as substantially a series of character lines. In order for characters to move continuously and smoothly on the television screen, the operations of writing and reading data to and from the storage device 500 described above must be performed apparently continuously. However, these operations are performed using a memory address time division method or a video blanking write method. In order to display characters on a television screen, it is necessary to sequentially move the position of the characters on the screen, for example from right to left. Therefore, as the storage device 500, one having a storage capacity corresponding to the display of two television screens may be used, as will be explained later with reference to FIG. For example, if the image to be memorized is a black and white screen with 512 dots horizontally and 480 lines vertically, then 512 dots/8 dots x 480 fins x 2 sheets = 6
Since the number of customers of 1440 byte store is required, the number of customers is 64
It is possible to apply a cumulonite with a storage capacity of KzM.

A method of obtaining a roll display by applying a storage device having a storage capacity equivalent to two television screens as described above will be described below with reference to FIG. 2.

Fig. 2 considers the storage area for the two TV screens mentioned above divided into side A for one screen and side B for another screen.
FIG. 2 is a diagram illustrating changes over time in the stored contents on each side and changes over time in the display on the television screen (that is, roll display). In Fig. 2, T is a standard caption card that is to be imaged by a television camera. However, G, H, and I are drawn on the third line. AI, A2. A3. A4 represents the changes over time in the memory contents in storage area A, Bl, B2. Ba and B4 each represent a change over time in the memory contents on the B side of the storage area. A1 and Bl, A2 and B2. A3 and B3.
A4 and B4 each correspond to the memory contents at the same time. PI, P2, P3, and P4 each represent how the television image changes over time. When the reading circuit 600 starts reading from side A, the writing circuit sets side A to be completely erased as an initial setting in order to clear the output screen (FIG. 2 AI). At this time, on the B side, the image of "ABCJ" in the first line of the telop card T is written at the vertical address corresponding to its vertical display position after a predetermined address conversion. Before the μ display starts, side A is read.The readout circuit 600 is configured to have a set counter (to be described later) that has memory addresses for two screens, and a read address counter that specifies the address of the data to be read. With the passage of time, the value in the read address counter is incremented by one dot per field, for example, using the input horizontal synchronizing signal as a reference.

When characters are rolled one dot at a time from the right to the left of the screen in the l field, 512 dots/60 fields = aS seconds x approximately 8
A row μ corresponding to the width of one screen is performed in 5 seconds. Reading in the middle of this roll movement, l? 7-The output screen is as shown in FIG. 2, P1.

The readout circuit 600 generates a row-side shunting pulse to rewrite the stored content on side A or B at the timing when the address specified as the data read target completely becomes the address on side B (approximately 85 seconds after the start of roll display). generate. The video signal corresponding to the character 11) EFJ on the second row of the Shitelop card T is sent to the writing circuit 300 by the row side input pulse, and (1) EFJ is placed at the vertical display position where low μ should be displayed. It is written to the vertical address of the corresponding side A (Fig. 2) When the set counter A row side indentation pulse is generated,
3 of the telop card T is written on the JB side by the writing circuit 300.
“The signal corresponding to GHIJ is written in the second row.
Figure B3). If you want to end the low μ display when the "GH■" screen appears on the low 2 screen, perform end processing such as displaying a black screen using a preset command etc. at the time of the next row side print. Erase side A as the final sea fence. rGHI J 75! T:1-
At the next timing when it disappears from the μ screen, the set counter 602 stops counting and the series of operations ends.

Next, the present invention will be described in detail with reference to FIG. 3, which is a detailed block diagram of the apparatus of the present invention. In FIG. 3, parts corresponding to those in FIG. 1 are indicated using the same reference numerals. Inside the readout circuit 600 shown by broken lines in FIG. 3, a read address counter 601, a set counter 602, a speed control circuit 603, a pit delay circuit 604, and a read data register 605 are connected as shown (I
has been completed.

The configuration of the set counter 602 is as follows:
”) controls rolling by one word (16 bits), and the upper five digits (24 to 2') specify the horizontal position on the screen for every 16 bits. That is, the address of the storage device 500 is specified. The most significant bit 2' is configured to designate the address of surfaces A and H of the above-mentioned area in the storage device 500.

The set counter 602 is set to 0 at the time of initial setting. After the roll is started, the speed control circuit 603 outputs a signal of 1 per field, for example, to increment the count value in the set counter 602. During the horizontal blanking period, the lower four digits of the count value in the set counter 602 are transferred to the pit delay circuit 604, and the digits corresponding to the upper horizontal position and surface addresses of A and B are transferred to the read address counter (601). is set to The digit corresponding to the surface address of the set counter 602 (
An interrupt pulse INT for performing surface writing is generated at the timing when the two values change. The read address counter 601 has address counters corresponding to the vertical position of the screen in addition to the horizontal position of the screen and surface addresses (divisions of sides A and B). Among the values in these counters, the values of the horizontal position address and surface address are set by the set counter 602 during the horizontal blanking period. For example, if the address of the 15th word (however, the total width of the screen is 32 words) corresponding to the left and right center of side A is set during the horizontal blanking period, the right side of side A will be visible on the left side of the screen on the row 2 screen. On the right side of the center, the read address counter 601 does not specify addresses within eight planes, but the left side of side B becomes visible (state of P1 in FIG. 2). Set in the pit delay circuit 604,
The lower digit (2°-23) of counter 602 is set. Data corresponding to the image signal is read from the storage device 500, parallel-to-serial converted in the read data register 605, and the signal enters the pit delay circuit 604. The pit delay circuit 604 controls the amount of delay within the range of one word (16 bits) according to the value of the lower digit of the set counter 602, so that the roll screen moves smoothly without jumps for each word. . Speed control circuit 6
03 is a circuit that controls the speed of the roll screen by controlling the count value in the set counter 602 for each unit time. Write circuit 300 indicated by dashed lines
Inside is a video detection integration circuit 301 and a row counter 302.
, a position counter 303, a comparator 304, a striking portion detection circuit 305, a vertical ring counter 306, a reference position setting circuit 307, a fit address counter 308, a write processing circuit 309, and a write data register 310 are connected as shown in the figure. has been done. This writing circuit 30
0 is the input signal Vt converted into a logical rep μ by the video signal processing circuit 200 at the initial setting (AI, Bl in FIG. 2) and when the row interrupt signal INT is input to the readout circuit 600 described above. It has a function of cutting the rows and writing one row of data X on the A side and the 8th side to a predetermined position in the storage device 500. The interior of the video signal processing circuit 200 indicated by the broken line has a configuration in which a level conversion circuit 201 and a synchronization separation circuit 202 are arranged in parallel as shown.

The timing of signals in each part of FIG. 3 is shown in the timing diagram of FIG. 4. In FIG. 4, symbols corresponding to the signals are attached to the left end of each waveform, such as Vln
is a video signal input from the input terminal 100 (however, it is shown in a simplified manner), vt is a logical video signal that is the output signal of the level conversion circuit 201, and Vd is the video integration circuit 301.
LC is the count value of the row counter 303, Gp is the output signal of the comparator 304, SY is the synchronization timing signal obtained by separating from the aforementioned video signal Vin by the synchronization separation circuit 202, and INT is the set counter 6
02, a row interrupt signal is output more than 02, Wad represents an output signal of the write address counter 308, and WD represents an output signal of the write processing circuit 309.

In addition, in FIG. 4, character lines ABC, DF,
F and GHI are shown according to the timing. Still on the right side of the broken line in this timing diagram,
The timing of each signal at the time of entry is shown in the row ≠ 11 after the elapse of I'll time. fc in FIG. 3 represents a dot clock signal obtained by multiplying the synchronous frequency by the water Δ output from the synchronous public circuit 1 circuit 202, and is 1/16 f.
C represents the frequency-divided signal, and Rad represents the output signal of the read address counter 601.

The present invention will be briefly explained below with reference to FIGS. 3 and 4.

In FIG. 3, a video signal Vln from an imaging device such as a video camera inputted from an input terminal 100 is converted into a logic level signal Vt by a video signal processing circuit 2000 and a level conversion circuit 201, and then passes through a video detection integration circuit 301. The waveform becomes as shown in FIG. 4 (Vd), and the row counter 302 is caused to count at the falling edge of this signal. On the other hand, the position of the next row to be merged is given to a position counter (303). The value of the 1-position counter 303 is cleared to "0" at the time of initial setting. Both counters above %3
02 and 3037) are respectively input to a comparator 304 to obtain a matching output as shown in FIG. 4 (Gp). Note that each waveform in FIG. 4 represents the state when the value of the position counter 303 is "1", and is one line of data (
FIG. 4 (WD) Matching output of comparator 304 (
The falling edge of Fig. 4 (Gp) is detected by the cutting section detection circuit 305.
At that timing, the reference position setting circuit 307 sets the vertical ring counter 306 to the reference position of the display in the vertical direction (in this example, the number of fins is 20, expressed as the position of the horizontal scanning line).
0H position). The value is then transferred to write address counter 308. Then, at the timing of 130H, which is the falling edge of the second line of the input signal Vin (therefore, the output Vd' of the video detection integration circuit 301), the write address counter 308 changes the number of fins to 200.
This is the address corresponding to the Hth address. 8 of the logical video signal Vt by the operation of the 1-field vertical ring counter 306.
Data from 0H to 130H is 150H in storage @500
It is written to the address corresponding to ~200H. At the time of reading, since the characters are read out according to fin synchronization, the lower part of the row of characters displayed in a roll is displayed at 200H, which is set as the reference position.

The size of the characters can be set arbitrarily for each line, but on the roll screen, the vertical position of the bottom of each line is automatically aligned to the fin position of 200H.

The above explanation is based on the case where a material with three lines of characters (a caption card) is used, but in principle there is no limit to the number of lines that can be displayed. Further, the same method as described above can be applied to not only horizontal writing (row direction) but also vertical writing (column direction) materials to perform vertical roll display.

As described above, according to the present invention, it is possible to display a roll based on a single material such as a standard-sized caption card without using a long material such as a roll of paper. Therefore, not only is there no need for a large device for feeding out rolls of paper, but since the materials are small, a large number of materials can be stored in a small space. Furthermore, since the drawn contents of the materials are concentrated on one surface, it is extremely efficient to select the required material from among a large number of materials. Furthermore, by changing the frequency of the output signal of the speed control circuit 603, the low μ speed can be easily selected arbitrarily.

In the above, the case where a signal obtained by imaging a subtitle card is used as a video signal source for obtaining a still image has been described in detail, but a computer video output signal converted into a television video signal or a still image can also be used as a video signal source. Of course, a file video output signal or the like can be applied.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the principle of the present invention, FIG. 2 is a diagram for explaining the present invention in detail, FIG. 3 is a detailed block diagram of the device of the present invention, and FIG. 4 is a diagram of the device of the present invention. FIG. 3 is a timing diagram showing the operation. DESCRIPTION OF SYMBOLS 100... Input terminal, 200... Video signal processing circuit, 300... Writing circuit, 400... Switching means, 500... Storage device, 600... Reading circuit,
700...Output circuit 800...Output terminal agent Patent attorney Takaharu Higashishima

Claims (2)

[Claims] (1) A pattern consisting of rows or columns of characters, symbols, etc. written on the surface of one sheet is converted into a video signal, and this video signal is divided into one or more rows or columns and stored. A still image processing method in which the stored contents are read out in a substantially continuous manner and rolled and displayed on a screen as rows or columns of patterns such as characters. (2) A video signal processing circuit that converts a video signal from an imaging device into a logic level signal, and a row or column of a pattern such as a character imaged by the imaging device based on an output signal of the video signal processing circuit. a storage device that recognizes and stores it in a corresponding address for each row or column;
A still image processing device comprising: a readout circuit that reads out the stored contents of the storage device in a predetermined order for rolling display on a screen; and an output circuit that converts an output signal of the readout circuit into a video signal.