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Image encoding device and method, image decoding device and method, and image transmission system

An image encoding and image decoding technology, which is applied in the field of image encoding equipment, image decoding equipment and image transmission system, can solve the problem of increasing the amount of encoded data, etc.

Active Publication Date: 2020-08-18
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This results in an increased amount of encoded data

Method used

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  • Image encoding device and method, image decoding device and method, and image transmission system
  • Image encoding device and method, image decoding device and method, and image transmission system
  • Image encoding device and method, image decoding device and method, and image transmission system

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no. 1 approach

[0031] figure 1 A configuration and processing example of the image coding device according to the first embodiment are shown. The image encoding device 10 is a device for generating encoded data by encoding an input image that is video. We assume the case where an input image 1 is input and encoded data 2 is output. The image encoding device 10 includes a mode determination unit 11 and an encoding unit 12 . The mode determination unit 11 and the encoding unit 12 are realized as, for example, semiconductor circuits. At least a part of the processing of the mode determination unit 11 and the encoding unit 12 can be realized by a processor executing a predetermined program.

[0032] The mode determination unit 11 determines a first operation mode and a second operation mode of the adaptive filter applied to the encoding target block 1 a in the input image 1 at the time of decoding. The mode determination unit 11 determines the first operation mode based on the first signal o...

no. 2 approach

[0038] Next, the second embodiment relates to an image encoding device and an image decoding device that respectively perform encoding and decoding of video in HEVC. figure 2 A configuration example of an image encoding device according to the second embodiment is shown. The image coding apparatus 100 includes a prediction error signal generation unit 101, an orthogonal transformation unit 102, a quantization unit 103, an inverse quantization unit 104, an inverse orthogonal transformation unit 105, a decoded image generation unit 106, a deblocking filter 107, an SAO unit 108, A decoded image storage unit 109 , a motion search unit 110 , a motion compensation unit 111 , a predicted image generation unit 112 , and an entropy encoding unit 113 .

[0039] Each picture of video data input to the image encoding device 100 is divided into blocks. The prediction error signal generation unit 101 acquires an encoding target block, and calculates a difference between the acquired encod...

no. 3 approach

[0180] The image encoding device 100 and the image decoding device 200 according to the second embodiment, the first modification, or the second modification described above, for example, by combining them into Figure 20 The image transmission system shown is implemented. Figure 20 A configuration example of an image transmission system according to the third embodiment is shown. The image transmission system includes an image transmission system 410 for generating and transmitting a video stream and an image reception system 420 for receiving and decoding the video stream.

[0181] The image transmission system 410 includes, for example, an image input device 411 , an image encoding device 412 , and a transmission device 413 . The image input device 411 supplies video baseband data to the image encoding device 412 . For example, the image input device 411 may be a camera for capturing and outputting an image or a device for outputting image data previously stored in a sto...

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Abstract

An image encoding apparatus includes a mode determining unit and an encoding unit. The mode determining unit determines a first operating mode and a second operating mode of an adaptive filter which is applied to a block in an input image in decoding. In this regard, the mode determining unit determines the first operating mode based on a first signal of the input image, and determines the second operating mode based on a second signal of the input image. The encoding unit encodes the second operating mode by assigning a code with a lower bit number to the second operating mode when the second operating mode has higher similarities to the first operating mode.

Description

technical field [0001] The embodiments discussed herein relate to an image encoding device, an image encoding method, an image decoding device, an image decoding method, and an image transmission system. Background technique [0002] H.265 / HEVC (High Efficiency Video Coding), hereinafter simply referred to as "HEVC", has attracted much attention as a next-generation video coding standard. Compared with the existing H.264 / MPEG-4AVC (Moving Picture Experts Group-Stage Four Advanced Video Coding) standard, HEVC offers almost twice the compression performance. In HEVC, an adaptive filter called SAO (Sample Adaptive Offset) is applied to improve the quality of the decoded image. [0003] For techniques related to adaptive filters, for example, there is provided an image processing apparatus for comparing the offset value determined for the luminance signal provided by the adaptive offset unit with respect to each division by referring to the quadtree structure and The area calc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/103H04N19/117H04N19/176H04N19/186H04N19/70H04N19/91
CPCH04N19/103H04N19/117H04N19/176H04N19/186H04N19/70H04N19/91H04N19/14H04N19/463
Inventor 三好秀诚
Owner FUJITSU LTD
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