JP2709474B2 - Character / pattern information display - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a character / pattern information display device for displaying character / pattern information such as teletext or captain on a display or the like.

(Prior Art) In recent years, a TV / broadcast screen and a character / pattern information screen are simultaneously displayed on a character / pattern information device such as a teletext or a multi-screen display for displaying a large number of character / pattern information in one screen. In order to realize this, reduced display of character / pattern information is required.

FIG. 3 is a block diagram of a conventional character / pattern information display device, and FIG. 4 is an example of a conventional 4-dot / 4-line block coloring. In FIG. 3, 1 is a Y memory for storing pattern information, 2 is an attribute memory (hereinafter referred to as ATR memory) for storing attribute information, 3
Is a 4-dot / 4-line processing unit that processes information for each 4-dot / 4-line of the Y memory 1, 4 is a display control unit, and 5 is a display signal.

Next, the operation of the above-described conventional example will be described with reference to FIGS. 3 and 4 regarding the foreground color (hereinafter, referred to as FG), taking as an example a text broadcast level A of eight colors and two gradations. In FIG.
a ₀ ~a ₇ are the contents of the Y memory 1, b ₀ ~b ₇ shows the content of FG information in ATR memory 2. Here When a ₀ ~a ₇ are all "1", a ₀ ~a ₃ is the color given by the value of _{b 3, b 2, b 1} , b 0. Also a ₄ ~a ₇ is the color given by the value of _{b 7, b 6, b 5} , b 4. In other words, b ₀ for 8-dot display of a ₀ ~a ₇
8 bits of FG information ~b ₇ is required. Therefore, one byte (8 bits) of Y memory and one byte (8 bits) of FG information are processed as one cycle. The FG information is updated every four lines in the vertical direction.

(Problems to be Solved by the Invention) However, in the above-described conventional character / pattern information display device, it is not possible to specify coloring for every two dots and two lines. If the written image is reduced to 1/4 by thinning out every dot and every line in the vertical direction, only 8 bits of FG information can be read out of 8 bits of pattern information. As a result, there is a problem that the pattern and the attribute do not match.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a character / pattern information display device in which a pattern and an attribute match even when reduced display is performed.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes an attribute additional memory and a 2-dot / 2-line processing unit.

(Operation) The present invention makes it possible to control attributes every two dots and two lines by associating 16-bit FG information with 8-bit pattern information by the above-described configuration, and to reduce the pattern and attribute without deviation. Attribute control during display can be performed.

(Embodiment) FIG. 1 is a block diagram of a character / pattern information display device according to an embodiment of the present invention, and FIG. 2 is a block coloring example of 2 dots / 2 lines of the present invention. In FIG. 1, 1 is a Y memory, 2 is an ATR memory, 4 is a display control unit,
Reference numeral 5 denotes a display signal, and 1, 2, 4, and 5 are the same as those in the conventional example shown in FIG. Reference numeral 6 denotes an ATR additional memory which increases because the coloring unit is reduced, and 7 denotes 8-bit pattern information read out from the Y memory 1 in one access and the ATR memory 2 and the ATR additional memory 6 corresponding to the pattern information. The read 16-bit unit attribute information is 2 dots / 2
This is a 2-dot / 2-line processing unit that processes each line.

Next, the operation of the above embodiment will be described with reference to an example of a text broadcasting level A of eight colors and two gradations. In Figure 2, a ₀ ~a ₇ are the contents of the Y memory, where a ₀ ~a ₇ is one that is obtained by reducing the a ₀ ~a ₁₅ which is the original information. b ₀ ~b ₁₅ shows the content of FG information in the ATR memory. Here, if a _{0 to} a ₇ are all “1”, a ₀ , a ₁ is b ₃ , b ₂ , b ₁ , b ₀ , a ₂ , a ₃ is b ₇ , b ₆ , b ₅ ,
b ₄ , a ₄ , a ₅ are colors given by b ₁₁ , b ₁₀ , b ₃ , b ₈ , a ₆ , a ₇ are given by b ₁₅ , b ₁₄ , b ₁₃ , b ₁₂ respectively. That is, 16 bits of FG information b ₀ ~b ₁₅ to display the 8 dots of a ₀ ~a ₇ is required. Therefore, one byte (8 bits) of Y memory and one word (16 bits) of FG information are processed as one cycle. The FG information is updated every two lines in the vertical direction. The same applies to attributes other than FG.

As described above, according to the above-described embodiment, by providing the attribute extension memory and the 2-dot / 2-line processing unit for word-processing the attribute data, the attribute processing can be performed every two dots without changing the access time of the used memory. .

(Effects of the Invention) As is clear from the above embodiment, the present invention provides an ATR additional memory and a 2-dot / 2-line processing unit,
There is an effect that attribute control at the time of reduced display in which the positions of the pattern and the attribute match can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram of a character / pattern information display device according to an embodiment of the present invention. FIG. 2 is a coloring example of 2 dots / 2 lines. FIG. 3 is a block diagram of a conventional character / pattern information display device. FIG. 4 shows an example of block coloring of 4 dots and 4 lines. 1 ... Y memory, 2 ... ATR memory, 3 ... 4 dots / 4 lines processing unit, 4 ... Display control unit, 5 ... Display signal, 6 ... ATR expansion memory, 7 ... 2 dots / 2 Line processing unit.

Claims (1)

(57) [Claims] 1. A Y memory for storing pattern information, an attribute memory for storing attribute information, and a foreground color, a background color, a flushing control, and a concealment in attribute control at the time of reduced display of character / pattern information or multi-screen display. An attribute extension memory for control, the 8-bit pattern information read from the Y memory in one access, and the 16-bit unit read from the attribute memory and the attribute extension memory corresponding to the pattern information. Attribute information is processed every 2 dots / 2 lines 2 dots / 2
A character / pattern information display device comprising: a line processing unit;