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Rapid inter-frame transcoding method for reducing video resolution based on HEVC

A high-resolution, low-resolution technology, applied in the field of fast inter-frame transcoding, can solve the problems of high algorithm complexity and long time consumption, and achieve the effect of reducing quadtree division, reducing encoding time, and reducing computational complexity

Active Publication Date: 2015-04-29
SICHUAN UNIV
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Problems solved by technology

The traditional HEVC spatial resolution transcoding is as follows: first down-sample the high-resolution video, and then perform HEVC full encoding on the low-resolution video obtained by the down-sampling. This method is also called the HEVC direct cascade transcoding method, and its algorithm is complex. high, time consuming

Method used

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  • Rapid inter-frame transcoding method for reducing video resolution based on HEVC
  • Rapid inter-frame transcoding method for reducing video resolution based on HEVC
  • Rapid inter-frame transcoding method for reducing video resolution based on HEVC

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Embodiment

[0051] figure 1 The transcoder in is a flowchart of the entire transcoding algorithm, including HEVC high-resolution video stream and HEVC low-resolution video stream, entropy decoding and entropy encoding, inverse quantization and quantization, inverse transformation and transformation, and encoding mode correspondence , inter-frame mode judgment, intra-frame mode judgment and other codec modules. The transcoder runs and operates in a computer system.

[0052] In this example, a HEVC standard video sequence ParkScene_1920x1080_24.yuv with a size of 1920×1080 is processed by using the fast inter-frame transcoding algorithm for video resolution reduction. figure 1 The flow chart of the transcoding algorithm for realizing the fast inter-frame transcoding method based on HEVC reduced video resolution is shown, and the operation steps are as follows:

[0053] Step 1: First, use the gradient-based adaptive downsampling method to downsample ParkScene_1920x1080_24.yuv to obtain a v...

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Abstract

The invention relates to a rapid inter-frame transcoding method for reducing video resolution based on HEVC, and belongs to the technical field of video resolution. The rapid inter-frame transcoding method starts with analyzing CU partitions and the similarity of PU encoding modes of HEVC high-resolution video and corresponding low-resolution video, and determines the CU partition and a PU prediction mode of the corresponding low-resolution video at an HEVC encoder end through utilizing predicted information such as the CU partition and MV of the high-resolution video at an HEVC decoding end, so that the computational complexity of mode decision in an inter-frame transcoding process is reduced. By means of the rapid inter-frame transcoding method for reducing the video resolution based on the HEVC, the computational complexity of encoding can be greatly reduced under the situation that the bit rate and the video quality loss are very small, so that the encoding time is saved.

Description

technical field [0001] The present invention relates to video resolution technology in video coding, in particular to a fast inter-frame transcoding method for reducing video resolution based on High Efficiency Video Coding Standard (HEVC), and belongs to the technical field of video resolution. Background technique [0002] With the development of network and camera technology and the improvement of terminal processing capabilities, people's demand for video quality has also increased. The concept of popularizing high-definition video has been deeply rooted in the hearts of the people. People urgently hope that high-definition video can be widely used in various fields of production and life. . However, the improvement of video resolution puts forward higher requirements on the compression performance of video compression coding. Advanced Video Coding (H.264 / AVC), also known as the limitation of macroblock mechanism Sex is also more obvious. To solve this problem, ITU_T V...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/40H04N19/154H04N19/503
Inventor 何小海李雪晴熊淑华李向群罗芳芳王正勇滕奇志
Owner SICHUAN UNIV
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