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Method of fast inter-frame transcoding based on hevc to reduce video resolution

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: 2018-07-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 down-sampling. This method is also called the HEVC direct cascade transcoding method, and its algorithm is complex high, time consuming

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  • Method of fast inter-frame transcoding based on hevc to reduce video resolution
  • Method of fast inter-frame transcoding based on hevc to reduce video resolution
  • Method of fast inter-frame transcoding based on hevc to reduce video resolution

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Embodiment

[0050] 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.

[0051] In this example, a HEVC standard video sequence ParkScene_1920x1080_24.yuv with a size of 1220×1080 is processed by using the fast inter-frame transcoding algorithm to reduce the video resolution. 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:

[0052] 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 fast inter-frame transcoding method for reducing video resolution based on HEVC, and belongs to the technical field of video resolution. This method starts with a fast inter-frame transcoding algorithm that analyzes the similarity between HEVC high-resolution video and its corresponding low-resolution video CU division and PU encoding method, and utilizes the CU division, MV and other information to determine the CU division and PU prediction mode of the corresponding low-resolution video at the HEVC encoding end, thereby saving the computational complexity of mode decision in the inter-frame transcoding process. The transcoding method of the present invention greatly reduces the computational complexity of encoding under the condition of very little loss of bit rate and video quality, thereby saving encoding time.

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...

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Application Information

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Patent Type & Authority Patents(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