Video coding method and device

A video encoding and encoding technology, which is applied in the field of video encoding, can solve problems such as high computational complexity and difficulty

Inactive Publication Date: 2015-05-06
LETV INFORMATION TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a high computational complexity is difficult to be widely used in practi

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Embodiment Construction

[0091] The present invention mainly includes two aspects: hierarchical intra-frame coding and hierarchical inter-frame coding.

[0092] The above-mentioned hierarchical intra-frame coding refers to: down-sampling the video image, generating one or more video images with different resolution levels according to the original video image, performing intra-frame coding prediction mode screening on the video image with the lowest resolution level, and obtaining The optimal intra-frame prediction mode of the lowest resolution level; for the video image of the intermediate resolution level and the original video image (that is, the video image of the highest resolution level), the optimal intra-frame prediction mode of the video image of the lower level is included In the intra-frame coding prediction mode screening set of this resolution level, perform intra-frame coding prediction mode screening of intermediate resolution level and original video image to obtain the optimal intra-fr...

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Abstract

The invention discloses a video coding method and a video coding device. The video coding method comprises the following steps: performing downsampling on a video image with highest resolution level to generate D video damages with different resolution levels; performing inter-frame coding predication mode screening on the video image with the lowest resolution level to obtain the optimal inter-frame prediction mode with lowest resolution level; for the video images without lowest resolution level, adding the optical inter-frame coding predication mode of the video image with resolution level Ld+1 into the inter-frame coding predication mode screening set of the video image with the resolution level Ld according to the low-to-high sequence of the resolution level, performing inter-frame coding predication mode screening to obtain the optimal inter-frame predication mode of the video image with the resolution level Ld; performing predication and video coding on the video image with the highest resolution level by using the optimal inter-frame coding predication mode with the highest resolution level. Compared with an existing HEVC (high efficiency video coding) method, the video coding method disclosed by the invention can be used for increasing the video coding speed by 2-4 times.

Description

technical field [0001] The present application relates to the field of video coding, and in particular to a video coding method and device. Background technique [0002] In recent years, with the development of the Internet and hardware devices, the cost of video production has become lower and lower, and the demand for video sharing and access has been increasing. The resolution of video is getting bigger and bigger, high-definition video (resolution is 1920×1080, denoted as 1080p) and even ultra-high-definition video (resolution is 3840×2160, denoted as 4K) is being produced, disseminated and played more and more . However, neither MPEG-2 (Moving Picture Experts Group 2, Moving Picture Experts Group Series Standard 2) nor H.264 / AVC (Advanced Video Coding, Advanced Video Coding) are designed for this high-resolution video , which puts forward new requirements and challenges for video compression technology. [0003] In 2013, by ITU-T (International Telecommunication Unio...

Claims

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Application Information

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IPC IPC(8): H04N19/11H04N19/59H04N19/513H04N19/119
Inventor 蔡砚刚魏伟白茂生刘阳
Owner LETV INFORMATION TECH BEIJING
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