JPS6154529A - Vertical-to-horizontal converting circuit - Google Patents

Abstract

PURPOSE:To reduce the load on a computer and also to speed up the processing time by using an image information memory and its peripheral circuit to convert and process the transfer method of image information. CONSTITUTION:The data on the image information stored in memory cells 41- 44 of a memory 4 are read out with the address designations (as) and (a) shown in a table 1. Then the image information shown in a table 2 is sent from the memory 4 in case the vertical read mode SEL is equal to ''0''. While the image information shown in a table 3 is sent from the memory 4 in case the horizontal read mode SEL is equal to ''1''. These output information are delivered after the bits of each input data, i.e., delivered rows d0-d3 are rearranged to D0-D3 respectively by a data selecting circuit 5. Thus the data consisting of correct bits can be delivered.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an aspect conversion circuit used in a data transfer circuit of an electronic device that handles image information and has various image output means. .

Conventional technology> Conventionally, image information output from electronic computers, etc., such as various characters such as alphabets, numbers, kana, and kanji, is transmitted using cathode ray tubes (
Braun tube + Catbode Ray; hereafter,
(abbreviated as CRT) and plasma display panel (Plaza)
The transfer method differs depending on whether the data is sent to another display (SMA Display Panel: hereinafter abbreviated as PDP) or to a printer. In other words, when transferring the image information stored in the memory to the above display, the CRT display scans horizontally and displays characters from top to bottom, so in the example shown in Figure 4, the Y1 line The image information is read from the X1 column to the Xn column, and then the image information is read from the X1 column to the
Image information is read out in columns n and so on, and the image information is serially transferred to the transmission line. On the other hand, when sending image information to a printer, a serial printer scans the characters perpendicularly and prints them one character at a time from left to right, so in the example shown in Figure 4, the The image information is read from the Y1 row to the Yn row, and then the image information is read from the Y1 row to the Yn row in the X2 column, and the image information is transferred in parallel to the transmission path.

To illustrate this using 4x4 bit image information as an example,
The data of the image information stored in the memory is
As shown in the figure, the rows are d.

1 (II Id21OL, column S.

Expressed as S+ 1s21s3, when the contents of the memory are read out in the vertical direction, data as shown in Table 5 is read out and the time elapses. Then, A, B, C, D, time t1
Then, E, F, G, and H are read out sequentially. Furthermore, when reading out in the horizontal direction, data as shown in Table 6 is read out. The image information data read out in the vertical or horizontal direction is then transferred to an output device such as a display or printer.

As described above, the image information transfer method must be changed in accordance with the characteristics of various output devices, and conventionally, this conversion process has normally been performed by processing on a program such as a computer. In addition, as a hardware measure,
It is shown in the publication No.-53338.

<Problems to be Solved by the Invention> However, a software solution requires a lot of processing time and is inefficient, so a hardware solution is desired.

In addition, the print specifications of recent printers are becoming more advanced, such as vertical printing and horizontal printing of image information, so the processing amount of printer controllers is increasing, and a dedicated controller is being required. Yes, but
Dedicated controllers are expensive because their uses are limited, leading to an increase in the cost of the entire system.

The present invention addresses the above-mentioned problems, performs the conversion process of the image information transfer method in the image information memory and its peripheral circuits, reduces the burden on the computer, speeds up the processing time, and uses a dedicated controller. An object of the present invention is to provide an aspect conversion circuit that can perform transfer method conversion processing without using a transfer method.

<Means for solving the problems> In order to achieve the above object, the vertical/horizontal conversion circuit of the present invention has the following features:
a memory for storing information to be converted laterally; and an addressing circuit for specifying each memory cell of the memory;
It consists of a data selection circuit that selects data of image information sent from the memory, and arranges the storage contents of the memory in an arrangement that facilitates vertical and horizontal conversion, and performs address designation and data selection according to each conversion specification. The feature is that it is made to output.

<Function> With the above configuration, the addressing circuit creates an addressing signal depending on whether the stored content of the memory, that is, image information data, is to be read out vertically or horizontally, and the memory is sequentially selected. , sends the data of the image information stored in the memory to the data selection circuit according to the addressing signal. The data selection circuit performs processing to correct the weight of each bit of the memory cell added when reading the memory contents to a predetermined weight, and sends out various outputs (image information data corresponding to various devices). .

<Examples> Hereinafter, the present invention will be specifically explained with reference to illustrated examples.

FIG. 1 is a circuit diagram showing an embodiment of the vertical/horizontal conversion circuit of the present invention, and FIG. 2 is a block diagram (geometrically representing the circuit of FIG. 1).

The vertical/horizontal conversion circuit includes an address conversion circuit 2 and a gate circuit 3.
an address designation circuit 1 that creates an address designation signal in response to reading in the vertical or horizontal direction; and a memory 4 that stores image information in an arrangement that facilitates vertical and horizontal conversion of the arrangement of stored contents of the memory. , and a data selection circuit 5 that corrects the weight of the image information data read from the memory 4 to an appropriate weight.

The embodiment shown in FIG. 1 shows the case of processing 4×4 bit image information, and the address conversion circuit 2 has 5
Consisting of conversion circuits 21, 22.23, 24.25,
By inputting the mode designation signal SEL and the address input signals A, , A, the outputs shown in Table 1 can be obtained from the signals SEL, A, , A. Here, the content of the mode designation signal SEL is 5EL=“0” in the vertical read mode, and SEL=m in the horizontal read mode. Address designation signals as, a generated by the address conversion circuit 2
are OR logic circuits 31, 32, 33, 34, 35, 36
, 37, 38, and a memory 4 consisting of memory cells 41, 42, 43, 44.
sent to.

The stored contents of image information in the memory 4 are arranged as shown in FIG. 3, and are arranged in an arrangement that is easy to convert vertically and horizontally. Yo? And each memory cell 41, 42, 4 of memory 4
3. When the data of the image information stored in 44 is read out by the address specification shown in Table 1, when the vertical read mode 5EL=rOJ, the image information shown in Table 2 is sent out from the memory 4. When the horizontal read mode 5EL is "1", image information as shown in Table 3 is sent out from the memory 4. At this time, unlike reading out the contents of the image in the vertical or horizontal direction, the contents are read in the diagonal direction, so the bits of the data sent out are shifted by one bit. Therefore,
As shown in Table 4, each bit of input data, that is, row d, is sent out by the data selection circuit 5. 1d11d21(
13. By rearranging and outputting each row d as shown in 1DIlD2+DI, data is sent from the correct bits as shown in Tables 5 and 6, and the contents of the memory shown in Figure 3 can be read vertically or This means that it is read in the horizontal direction. Note that the processing of the data selection circuit 5 is, in other words, 20.2', 2 added from the least significant digit to the most significant digit.
”, 23 is a process for modifying the weights.

Therefore, as described above, the mode designation signal SEL and the address input signal A. , A, 1)), vertical and horizontal conversion can be performed arbitrarily and easily.

Furthermore, although the above embodiment shows the case of 4×4 bits, the same concept can be used even if the number of bits increases.

Furthermore, the circuit shown in the above embodiment is implemented as an LSI (Large
ge 5cale↓integration; large-scale integrated circuit), it becomes possible to add it with only a simple circuit change.

<Effects of the Invention> As described above, the vertical/horizontal conversion circuit of the present invention can shift the arrangement of memory cells to transmit image information by specifying either the vertical or horizontal mode, and can transfer the data stored in the addressed memory. By providing an address designation circuit and a data selection circuit for correct reading, the burden on software processing can be reduced, and the problem can be solved hardware-wise by simply adding a circuit with a simple configuration. It is possible to improve processing efficiency, reduce processing costs, and improve functionality.

Furthermore, in small-scale equipment with low software processing capacity, it is difficult to perform vertical/horizontal conversion using software processing, but by adding the vertical/horizontal conversion circuit of the present invention, vertical/horizontal conversion can be performed using hardware. It can improve the functionality of small-scale equipment and expand its range of applications.

In addition, small-scale equipment with low software processing capacity (in some cases,
Although it is difficult to perform vertical/horizontal conversion using software processing,
By adding the vertical/horizontal conversion circuit of the present invention, vertical/horizontal conversion can be performed using hardware, thereby improving the functionality of small-scale equipment and expanding the range of applications.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the vertical/horizontal conversion circuit of the present invention. FIG. 1 is a circuit diagram of an embodiment that processes 4×4 bit image information, and FIG. FIGS. 3 to 5 are block diagrams functionally representing an example. FIGS.
FIG. 4 is a diagram showing the data arrangement of 4×4 bit image information in a memory that is used historically. FIG. 4 is a diagram showing the data arrangement of image information in a conventional memory. FIG. It is a diagram showing the arrangement of data of [×4-bit image information. 1...Address designation circuit 2...Address conversion circuit 3...Gate circuit 4...Memory 5...Data selection circuit SEL...Mode designation signal

Claims (1)

[Claims] In an electronic computer, etc., it consists of a memory that stores information to be vertically and horizontally converted, an addressing circuit that specifies each memory cell of the memory, and a data selection circuit that selects data of image information to be sent from the memory. ,
A vertical/horizontal conversion circuit characterized in that the arrangement of stored contents of a memory is arranged to facilitate vertical/horizontal conversion, and the address designation and data selection are performed and output according to each conversion designation.