Title:
動画像符号化装置及び動画像復号装置並びにプログラム
Document Type and Number:
Japanese Patent JP6660868
Kind Code:
B2
Abstract:
A moving image encoding device that performs encoding by converting and quantizing a prediction residual difference obtained by applying an interframe prediction or an intraframe prediction to each encoding tree block, which is a divided unit of a frame given by means of equirectangular projection, for each encoding block. The moving image encoding device includes: a calculation unit that calculates a quantization parameter to be applied to the encoding block on the basis of a pixel value of a pre-coding block and a position in the frame; a prediction unit that obtains a prediction value by predicting the quantization parameter on the basis of a quantization parameter of a left neighboring, and upper neighboring block of the encoding block, or an already encoded block; a correction unit that corrects the prediction value and obtains a correction value when a condition is satisfied where the encoding block is positioned at a left end of the frame and the left neighboring block and the upper neighboring block belong to encoding tree blocks that are different from the encoding tree block to which the encoding block belongs, and that obtains the prediction value as a correction value when the condition is not satisfied; and an encoding unit that encodes a difference between the correction value and the quantization parameter.
Inventors:
Kei Kawamura
Naito Sei
Naito Sei
Application Number:
JP2016222616A
Publication Date:
March 11, 2020
Filing Date:
November 15, 2016
Export Citation:
Assignee:
KDDI CORPORATION
International Classes:
H04N19/126; H04N19/167; H04N19/176; H04N19/463; H04N19/597
Domestic Patent References:
| JP2015207909A | ||||
| JP2010239221A | ||||
| JP2011023885A |
Foreign References:
| US20160142697 | ||||
| US20160112704 |
Attorney, Agent or Firm:
Kiyotaka Sakamoto
Sanji Tanabe
Sanji Tanabe