JPH11215380A - Image-processing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image-processing unit where high-speed parallel processing is attained so as to minimize a waiting time in processing by efficiently using a plurality of encoding devices. SOLUTION: Original images R, G, B consisting of a plurality of components (figure A) are divided into a plurality of blocks R0-R3, G0-G3, B0-B3 (figure B), and parallel processing is applied to each component of each block (figure D) by the use of a plurality of encoding devices 11-13 (figure C). The number of the encoding devices 11-13 (number is 3 in the figure) is selected to be an integral multiple of the number of components (3 in the figure). Thus, image processing having no an idle processing time is attained, so that a waiting time of the processing of each coder is eliminated, and highly efficient coding is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, and more particularly to compression and expansion of data in an image processing apparatus, and more particularly to data compression and expansion of image data. , FAX, data communication, etc.

[0002]

2. Description of the Related Art As a method for compressing and expanding image data, JPEG, which is an international standard, is conventionally known. Further, as described in Japanese Patent Application Laid-Open No. Hei 7-135652, there is an image processing apparatus that aims to speed up the compression and decompression processing of still image data by simultaneously executing a DCT operation and a quantization operation.

[0003]

In the conventional encoding technique, a single encoding device processes a plurality of components, so that it takes time to process one image. FIG.
FIG. 3 is a diagram for explaining an example of a conventional encoding device. In the conventional encoding process, each component of an original image including three components R, G, and B as shown in FIG. As shown in FIG. 3B, four blocks (R0, R1, R2, R3: G0, G1, G2, G3:
B0, B1, B2, and B3), and considering encoding, when the image is processed by the image processing device 30 having one encoding device 31 as shown in FIG. Since the blocks are serially processed, R0, G0, B0,... R3, G3, and B3, as shown in FIG. 3D, require a long processing time.

As shown in FIG. 4A, when processing is performed using an image processing device 40 having two encoding devices 41 and 42, as shown in FIG. Although the processing can be completed in a shorter time than the case where the processing is performed by the encoding apparatus, the processing time becomes vacant (empty 0, empty 1, empty 2, empty 3), and efficiency is hindered.

[0005] The present invention has been made in view of the above-mentioned circumstances, and in particular, by using a plurality of encoding devices efficiently, the processing waiting time is minimized and the image processing capable of high-speed parallel processing. It is intended to provide a device.

[0006]

SUMMARY OF THE INVENTION The present invention divides an original image composed of a plurality of components into a plurality of blocks, and performs parallel processing for each component of each block using a plurality of encoding devices. In the processing device, the number of the encoding devices is set to an integral multiple of the number of the components to enable image processing with no processing time, thereby eliminating the waiting time of the processing of each encoding device. , Highly efficient encoding is performed.

[0007]

FIG. 1 is a diagram for explaining an embodiment of an image processing apparatus according to the present invention. FIG. 1 shows an original image composed of three components R, G and B as shown in FIG. As shown in FIG. 1B, four blocks R0, R0
1, R2, R3: G0, G1, G2, G3: B0, B
1, B2, and B3, when encoding is performed, for example, three encoding devices 11, 12, 1, 1 as shown in FIG.
When the processing is performed by the image device 10 having
As shown in FIG. 1 (D), the encoding devices 11, 12, 13
Can be used in parallel so that there is no free processing time, and highly efficient processing can be performed.

FIG. 2 is a diagram for explaining another embodiment of the present invention. An original image composed of three components R, G, and B as shown in FIG. As shown in FIG. 2), when encoding is performed by dividing into four blocks, for example, as shown in FIG.
Image processing apparatus 2 having 22, 23, 24, 25, 26
When the process is performed at 0, the result is as shown in FIG. 2B, and the process can be performed with higher efficiency than the case shown in FIG.

[0009]

According to the present invention, there is provided an image processing apparatus for dividing an original image composed of a plurality of components into a plurality of blocks and performing parallel processing for each component of each block using a plurality of coding apparatuses. Is set to an integral multiple of the number of the components, enabling image processing with no space in the processing time, and eliminating the waiting time of the processing of each encoding device, so that highly efficient encoding can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of an image processing apparatus according to the present invention.

FIG. 2 is a diagram for explaining another example of the image processing apparatus according to the present invention.

FIG. 3 is a diagram illustrating an example of a conventional image processing apparatus.

FIG. 4 is a diagram for explaining another example of the conventional image processing apparatus.

[Explanation of symbols]

10, 20, 30, 40 ... Image processing device, 11, 12,
13,21,22,23,24,25,26,31,4
1, 42 ... coding device.

Claims (1)

[Claims] 1. An image processing apparatus for dividing an original image composed of a plurality of components into a plurality of blocks and performing parallel processing for each component of each block by using a plurality of coding apparatuses. An image processing apparatus, wherein the number of components is an integral multiple of the number of components, and image processing with no processing time is available.