JP2972281B2 - High-resolution facsimile broadcasting system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention enables a facsimile broadcast to be transmitted not only to a high-resolution compatible receiver but also to a normal facsimile broadcast receiver. And a high-resolution facsimile broadcasting system.

More specifically, the present invention relates to a facsimile broadcasting system using a television multiplex facsimile channel, a satellite broadcasting data channel, and the like. For example, a part of image data is transmitted by facsimile broadcasting with a resolution of 8 (dots, lines / mm). 16 (dots, lines) that can be shared with
/ mm) high-resolution facsimile broadcasting system.

[Summary of the Invention] In the present invention, in facsimile broadcasting, when image data in which a graphic portion composed of a drawing or a photograph and a character portion are mixed in the same screen is transmitted, only the graphic portion is converted to high-resolution image data. By decomposing this high-resolution image data into image data of a predetermined resolution and image data for high-resolution interpolation and transmitting the data, not only for a high-resolution compatible receiver, but also for a normal facsimile broadcast receiver The present invention relates to a high-resolution facsimile broadcasting system capable of transmitting an image also to an image having a resolution of 8 (do
ts, lines / mm) facsimile broadcast receiver,
By transmitting part of the image data as data having a resolution of 8 (dots, lines / mm), a high resolution (for example, a resolution of 16) that can be shared with ordinary facsimile broadcasting is used.
(Dots, lines / mm) facsimile broadcasting can be performed.

[Prior art] Facsimile broadcasting with a resolution of 16 (dots, lines / mm) has never existed. Therefore, only a part of the screen can be received at a high resolution by image data with a resolution of 16 (dots, lines / mm). No facsimile broadcast ever. A part of the image data of the facsimile broadcast having a resolution of 16 (dots, lines / mm) is converted to a resolution of 8 (dots, lines / m).
There is also no known broadcasting method that is shared as image data of facsimile broadcasting of m).

[Problems to be Solved by the Invention] Accordingly, a first object of the present invention is to provide a facsimile broadcast based on a black-and-white binary recording system, for example, in which only a graphic portion has a high horizontal resolution of 16 dots / mm and a vertical resolution of 16 lines / mm. It is an object of the present invention to provide a high-resolution facsimile broadcasting system capable of broadcasting higher-quality information by transmitting as high-resolution image data.

A second object of the present invention is to transmit a part of the high-resolution image data as facsimile image data having a resolution of 8 (dots, lines / mm), for example, so that the high-resolution image data can be shared with a normal-resolution facsimile broadcast. To provide a high-resolution facsimile broadcasting system.

Further, a third object of the present invention is to provide, as a result,
It is an object of the present invention to provide a high-resolution facsimile broadcast with an effective use of a transmission path.

[Means for Solving the Problems] The present invention relates to a facsimile broadcasting system for broadcasting still image information composed of graphic information of high resolution and text information of a predetermined resolution, wherein the graphic information is combined with graphic information of a predetermined resolution and high resolution. A graphic processing unit for decomposing the character information and the graphic information of the predetermined resolution output from the graphic processing unit, and transmitting the synthesized character information and the graphic information of the predetermined resolution.
And a transmission unit for transmitting the interpolation information for the high resolution output from the graphic processing unit.

[Operation] In the present invention, only the graphic portion is converted into high-resolution image data, and a part of the image data is transmitted as a normal-resolution facsimile broadcast image, which is compatible with normal-resolution facsimile broadcast. Moreover, a high-resolution facsimile broadcast that can effectively use the transmission path can be realized.

Next, an embodiment of the present invention will be described with reference to the drawings.

 First, the principle of the present invention will be specifically described.

For example, when the A4 size drawing is divided at a resolution of 16 (dots, lines / mm), as shown in FIG.
It is composed of pixel data having a value of 1 or 0 of pixels × 4752 pixels.

A facsimile receiver with a resolution of 16 (dots, lines / mm) needs all of these pixel data, but a facsimile receiver with a resolution of 8 (dots, lines / mm) can process all the pixels. First, the number of pixels that can be processed is half in the horizontal and vertical directions, respectively, and is 1/4 of the number of all pixels.

Therefore, instead of sequentially transmitting the pixel data having the configuration shown in FIG. 2A, in the first stage, for example, the pixel data at the pixel position indicated by hatching in FIG.
Only 1/4 of the number of pixels = 1728 × 2376) is extracted, and the pixel data is transmitted as facsimile image data by MH coding or MR coding. In the second stage, the pixel data at the pixel positions other than the hatched portion in FIG. 2B which is not transmitted in the first stage is extracted and transmitted as facsimile image data by the same encoding method.

FIG. 1 shows the above transmission diagram. According to the transmission procedure shown in FIG. 1, image data having a resolution of 16 (dots, lines / mm) is transmitted in two stages.

In the first stage, since only pixel data corresponding to 1728 dots × 2376 lines is transmitted after being subjected to MH or MR encoding, this is a facsimile image data format adapted to a facsimile receiver having a resolution of 8 (dots, lines / mm). And
Reception is possible with a receiver having a resolution of 8 (dots, lines / mm). A receiver having a resolution of 16 (dots, lines / mm) accumulates image data transmitted during this period.

In the second stage, pixel data other than the pixel positions indicated by the hatched portions in FIG. 2B is transmitted as facsimile image data by the same encoding method. Resolution 8 (dots, lines / m
In the facsimile receiver m), this image data cannot be processed and is not received. Resolution 16 (dots, lines / mm)
This receiver receives this image data and combines it with the already received first-stage image data to obtain a resolution of 16 (dots, l
ines / mm) facsimile image.

When the screen is divided at a resolution of 16 (dots, lines / mm), the number of pixels is four times larger than when the screen is divided at a resolution of 8 (dots, lines / mm). The amount of data also increases. Therefore, as shown in FIG. 3, the entire screen is converted to a resolution of 16 (dots, lines / mm).
Mode that can be transmitted with
Enables a mode that allows transmission at 16 (dots, lines / mm).

In this way, only the necessary parts are
(Dots, lines / mm) and resolution 16 (dots, lines / mm)
A part of the image data of lines / mm has a resolution of 8 (dots, lines
/ mm), it is possible to use the transmission line effectively.

Next, as an embodiment of the invention, FIG. 4 shows an example of a production system for enabling high-resolution facsimile broadcasting.
In the following description, only a part of the screen corresponding to the third screen in FIG. 3 is set to have a high resolution, but the other screens can be similarly considered.

The graphic information input unit 10 composed of an image scanner or the like converts a photograph or the like into an A4 document size with a resolution of 16 (dots, lines).
/ mm) and binarized by a dither method or the like. The signal 1 from the graphic information input unit 10 corresponds to FIG. 2 (A), and is image information having a size of 3456 horizontal pixels × 4752 vertical pixels × 1 bit.

The graphic information processing section 11 performs a process of cutting out an actual photograph portion from the signal 1 as an effective range as shown in FIG. 5A, for example. The signal 2 is the pixel data of the portion (within the dotted line in FIG. 5A) cut out while limiting the effective range. For example, if the size is 1200 pixels horizontally × 2000 pixels vertically, FIG. The configuration is as shown in (B), and the resolution is 16 (dots, lines / mm).

On the other hand, a character information input unit composed of a word processor, etc.
At 12, text data is created while laying out as an A4 document. The signal 3 is text data created by the character information input unit 12.

The character information processing unit 13 uses the internal character font from the text data string of the signal 3 to obtain a resolution of 8 (dots, lin).
es / mm) to expand to pixel data of the size of an A4 document,
The signal 4 is output. Signal 4 has a horizontal width of 1728 as shown in FIG.
Pixel data having a size of pixel × 2376 pixels × 1 bit. The area indicated by the dotted line in FIG. 6 is an area where a photograph or the like is to be synthesized later.

The facsimile conversion unit 14 receives the signal 2 and the signal 4, and performs a process of generating an image signal for facsimile broadcasting accompanied by high-resolution facsimile data. Next, the processing will be described.

FIG. 7 is a diagram showing a process of synthesizing a part of the pixel data of the signal 2 shown in FIG. 6B and the signal 4 shown in FIG.

From the signal 2, only the pixel data at the pixel position indicated by the hatched portion is extracted. The signal obtained as a result is 600 pixels horizontally x 1000 pixels vertically
The data is thinned out as pixels and the resolution is 16
(Dots, lines / mm) has been converted to 8 (dots, lines / mm). Therefore, this signal and the signal 4 can be directly combined, and as a result of the combination, the resolution becomes 8 (dots, lines).
/ mm) is combined with the A4 document.
The resulting pixel data of 1728 horizontal pixels × 2376 vertical pixels is subjected to MH coding or MR coding to obtain a resolution of 8 (dot).
(s, lines / mm) facsimile signal in a facsimile image data format suitable for a facsimile receiver. The signals obtained so far are image data to be transmitted in the first stage.

Next, creation of interpolation information required for a facsimile receiver having a resolution of 16 (dots, lines / mm) will be described. The two horizontal pixels and two vertical pixels in FIG. 7B are defined as one block, and the pixel positions in the block are defined as shown in FIG.
Since the pixel at pixel position 1 in FIG. 8 corresponds to the pixel at the pixel position indicated by the hatched portion in FIG. 7 (B), the pixel at pixel position 1 already has a resolution of 8 (dots, lines / mm). The processing has been completed for the facsimile signal of FIG. Resolution 16 (do
(ts, lines / mm), as a method of creating interpolation image data necessary for a facsimile receiver, first, as shown in FIG. 9A, only pixels at pixel position 2 of all blocks are extracted, and then By extracting the pixel at pixel position 3 in all blocks and finally extracting pixel position 4 in all blocks, MH coding is performed assuming that the pixels are continuous for each pixel data at the same pixel position in each block. Alternatively, a method of creating a facsimile signal for interpolation by performing MR coding, or as shown in FIG. 9B, first, only the pixel at pixel position 2 of all blocks is extracted, and then the pixels of all blocks are extracted. Extract the pixels at positions 3 and 4 and use MH coding or MR
A method of creating a facsimile signal for interpolation by encoding is conceivable. As a result, image data to be transmitted in the second stage is obtained.

By the above processing, the facsimile conversion unit 14 outputs a facsimile signal adapted to facsimile broadcasting at a resolution of 8 (dots, lines / mm) and a resolution of 16 (dots, lines / m).
The signal 5 is obtained as an interpolation facsimile signal for the facsimile receiver m).

According to the transmission diagram shown in FIG. 1, the facsimile image data obtained by the signal 5 is transmitted at the first stage, out of the signal 5, a facsimile signal suitable for facsimile broadcasting with a resolution of 8 (dots, lines / mm) is transmitted, In the second stage, resolution 16 (do
By transmitting an interpolation facsimile signal for a facsimile receiver of (ts, lines / mm), only a part of the screen can be transmitted at a resolution of 16 (dots, lines / mm). In this case, when transmitting the facsimile image data for interpolation, it is necessary to separately designate address information in the screen indicating which position on the screen the image data for interpolation is data for interpolating.

[Effects of the Invention] As described above, according to the present invention, a required graphic portion of image information to be transmitted can be transmitted at a high resolution, and the high-resolution image data is different from the normal-resolution image data. Since they can be shared, transmission lines can be effectively used.

More specifically, a part of the image data having a resolution of 16 (dots, lines / mm) can be shared as a facsimile broadcast image having a resolution of 8 (dots, lines / mm).
(Dots, lines / mm) facsimile broadcasting, and high-resolution facsimile broadcasting that can effectively use the transmission path can be realized.

[Brief description of the drawings]

FIG. 1 is a view showing image data transmission of a high-resolution facsimile broadcasting system according to the present invention. FIG. 2A is a diagram showing a configuration of pixel data when an A4 size screen is divided into 16 resolutions. FIG. 2 (B) is a diagram showing the transmission order of pixel data in the high-resolution facsimile broadcasting system according to the present invention. FIG. 3 is a diagram showing designation of a high resolution of an in-screen portion. FIG. 4 is a block diagram showing an example of a program production system for performing high-resolution facsimile broadcasting. 10: Graphic information input section, 11: Graphic information processing section, 12: Character information input section, 13: Character information processing section, 14: Facsimile conversion section. FIG. 5A is a diagram showing cutting out of the effective range in the graphic information processing unit. FIG. 5B is an enlarged view of the effective part data as a result of the extraction. FIG. 6 is a diagram showing an output signal from the character information processing unit. FIG. 7 is a diagram showing a combining process in the facsimile conversion unit. (A): character information; (B): graphic information. FIG. 8 is a diagram showing names of pixel positions in a block composed of two pixels vertically and horizontally. FIG. 9 is a diagram showing an example of a method for creating facsimile data for interpolation.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) H04N 1/387-1/393 H04N 1/00 H04N 1/41-1/419 H04N 7/08-7 / 088

Claims (1)

(57) [Claims] 1. A facsimile broadcasting system for broadcasting still image information comprising high-resolution graphic information and predetermined-resolution character information, wherein said graphic information is decomposed into predetermined-resolution graphic information and high-resolution interpolation information. Graphic processing means for outputting the character information and the graphic information of the predetermined resolution outputted from the graphic processing means, and transmitting the combined information; and the height output from the graphic processing means. And a second transmission means for transmitting interpolation information for resolution. A high-resolution facsimile broadcasting system.