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Method for quality scalable HEVC (high efficiency video coding)

A video coding and coding technology, applied in the field of video coding, can solve problems such as reducing coding time, and achieve the effect of improving real-time performance and reducing computational complexity

Active Publication Date: 2014-12-24
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although these two methods reduce the complexity of encoding to varying degrees, they are only for the enhancement layer, so the overall encoding time has room to be reduced again

Method used

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  • Method for quality scalable HEVC (high efficiency video coding)
  • Method for quality scalable HEVC (high efficiency video coding)
  • Method for quality scalable HEVC (high efficiency video coding)

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Embodiment Construction

[0029] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0030] Scalable video coding is divided into time-scalable, space-scalable and quality-scalable. figure 1 It is a structural block diagram of an HEVC scalable video coding SHVC encoder. This block diagram is a scalable coding situation of a base layer and an enhancement layer. It should be pointed out here that the enhancement layer can have multiple layers. from figure 1 It can be seen that, except for the inter-layer prediction technology between the base layer and the enhancement layer, the base layer and the enhancement layer are two independent HEVC video encoding and decoding processes. Since the video sequences of the base layer and the enhancement layer of scalable video coding are the same video, only the resolutions are different or the same. For quality scalability, the video resolutions of the base layer and the enhancement layer are the sa...

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Abstract

The invention discloses a method for quality scalable HEVC (high efficiency video coding), and belongs to the technical field of video coding. According to the method, the relevancy of the coding depth of a base layer and the coding depth of a reinforcement layer is used. When coding of the reinforcement layer is conducted, the actual coding depths of coding tree units of the base layer corresponding to all coding tree units of the reinforcement layer are used as the maximum coding depths of all the coding tree units of the reinforcement layer for coding. According to the method, the relevancy between corresponding CTU coding depths in a front frame and a rear frame is also used for further lowering the calculating complexity of a base layer coding algorithm. Compared with the prior art, under the premise that the image quality after coding can be guaranteed, the calculating complexity of coding is effectively lowered, and the real-time performance of the coding process is improved.

Description

technical field [0001] The invention relates to HEVC (High Efficiency Video Coding) video coding, in particular to a quality-scalable HEVC video coding method, which belongs to the technical field of video coding. Background technique [0002] With the development of video technology and video applications in the direction of high-definition reading, high compression rate and high frame rate, high-definition and ultra-high-definition videos have penetrated into every aspect of people's lives. A new generation of video coding standard HEVC emerged in this trend, and its extended SHVC (Scalable High Efficiency Video Coding) is under development. On the other hand, with the development of Internet and mobile device technology, more and more people browse video information content through smart phones or portable notebooks, which greatly enriches people's daily life. But we know that different devices have different screen resolutions, computing performance, network bandwidth r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/34H04N19/96H04N19/70
Inventor 胡栋葛庆阳朱惟妙徐秋萍
Owner NANJING UNIV OF POSTS & TELECOMM
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