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Fast coding method based on image texture and gradient features

A gradient feature and fast encoding technology, applied in the field of multimedia video, can solve problems such as increasing the effective encoder calculation amount, and achieve the effect of reducing the calculation amount

Inactive Publication Date: 2021-07-09
江苏允博信息科技有限公司
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Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a fast encoding method based on image texture and gradient features, which solves the problem of introducing a large amount of computational complexity into the existing HEVC intra-frame prediction process and improves the computational complexity of the effective encoder The problem

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  • Fast coding method based on image texture and gradient features

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Such as Figure 1-8 As shown, a fast encoding method based on image texture and gradient features, including CU division, and calculating the texture complexity Th, Tv of the current encoding CU in the horizontal and vertical directions of the CU block, the specific steps are as follows:

[0033] In the first step, the maximum value among Th and Tv is calculated as Tmax, and the minimum value is Tmin. The calculation formula is:

[0034]

[0035] Am...

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Abstract

The invention provides a fast coding method based on image texture and gradient features, and relates to the field of multimedia videos. The method comprises the steps of dividing a CU and calculating texture complexity Th and Tv35 of a current coding CU in the horizontal direction and the vertical direction of a CU block, and specifically comprises the following steps: 1, calculating the maximum value of Th and Tv as Tmax and the minimum value as Tmin. The rapid coding method based on the image texture and the gradient features comprises the steps: acquiring a horizontal gradient value Gh after a hadamard product is obtained through a horizontal sobel similar operator and a CU pixel brightness value, and acquiring a vertical gradient value Gv is obtained after an element sum after a hadamard product is obtained through a vertical sobel similar operator and the CU pixel brightness value; calculating the projection value SH of the gradient vector at different intra-frame prediction angles theta, and determining the range of an intra-frame prediction model, thereby solving the problems that a large amount of operation complexity is introduced in the intra-frame prediction process of the existing HEVC, and how to effectively reduce the operation amount of an encoder becomes an urgent problem at present.

Description

technical field [0001] The invention relates to the field of multimedia video, in particular to a fast encoding method based on image texture and gradient features. Background technique [0002] With the continuous development of multimedia digital video applications and the continuous improvement of people's demand for video cloud computing, the data volume of the original video source makes the existing transmission network bandwidth and storage resources unbearable. Therefore, the compression of video signal has become one of the hot spots of academic research and industrial application at home and abroad. In the past ten years, high-definition video and ultra-high-definition video have been widely popular. The huge amount of information in high-definition video has brought a sharp increase in data transmission pressure on communication networks, and has also adversely affected the continued development of high-definition video. [0003] JCT-VC, composed of VCEG and MPEG...

Claims

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Application Information

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IPC IPC(8): H04N19/119H04N19/593
CPCH04N19/119H04N19/593
Inventor 曹俊
Owner 江苏允博信息科技有限公司
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