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Ultrahigh-definition video layered coding and decoding method supporting efficient editing

A codec method and clear video technology, applied in digital video signal modification, electrical components, image communication, etc., can solve problems such as insufficient performance, achieve simplified operation, concise system process, and retain high image quality

Active Publication Date: 2021-08-17
CHENGDU SOBEY DIGITAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a layered encoding and decoding method for ultra-high-definition video that supports efficient editing. For ultra-high-definition video (8K, 16K, etc.), the editing and broadcasting frame is on the source video encoding side. It has been pre-processed and differentiated during encapsulation. While retaining high image quality, the editing side can directly extract the basic layer code stream for efficient editing, solving the original code rate editing and proxy code rate editing under common codec methods Insufficient performance problems caused by

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  • Ultrahigh-definition video layered coding and decoding method supporting efficient editing
  • Ultrahigh-definition video layered coding and decoding method supporting efficient editing

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Embodiment Construction

[0036] All features disclosed in all embodiments in this specification, or steps in all implicitly disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined and / or extended and replaced in any way.

[0037] Such as Figure 1~Figure 6 As shown, a layered encoding and decoding method for ultra-high-definition video that supports efficient editing, wherein the main process of encoding is described as follows:

[0038] 1. If Figure 1~Figure 2 As shown, the image scaling reversible transformation (such as 2-D wavelet transform, etc.) is performed on the original bit rate video to separate the four components of A component, H component, V component and D component. The A component represents the approximate value component, and the H component represents the level. The detail component, the V component represents the vertical detail component, and the D component represents the diagonal detail component; the A component is equivalent to ...

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Abstract

The invention discloses an ultra-high-definition video layered coding and decoding method supporting efficient editing. The method comprises the following steps: S11, carrying out image scaling reversible transformation on an original code rate video to separate detail components; S12, coding the component A to generate a basic layer code stream; S13, decoding the basic layer code stream generated in the step S12, and performing subtraction on the basic layer code stream and the component A before coding frame by frame and pixel by pixel to obtain residual data of the component A; S14, carrying out quantization processing on the residual data of the component A in the S13 and the detail components decomposed in the S11, and then carrying out entropy coding; S15, packaging the basic layer code stream generated in the step S12 and the enhancement layer code stream spliced in the step S14 into a mov format file and the like; and S16, decoding, wherein the step comprises a basic layer code stream decoding process, a source picture video decoding process and the like. The method is oriented to ultra-high-definition videos, and the problem that performance is insufficient due to original code rate editing and proxy code rate editing under a common encoding and decoding method is solved.

Description

technical field [0001] The present invention relates to the technical field of ultra-high-definition editing, and more specifically, relates to an ultra-high-definition video layered encoding and decoding method that supports efficient editing. Background technique [0002] The representative format of ultra-high-definition video is generally 4k or 8k. Taking 8K as an example, the baseband data of broadcasting-level 8K@50p exceeds 6GB per second. The editing side will involve video storage, codec, transmission, etc. Therefore, whether it is a physical host or a cloud virtual host, it is a huge challenge to edit and produce materials with this amount of data. Under the general codec method There are currently two mainstream editing methods. [0003] 1. Original code rate editing [0004] A high-performance host can barely realize the original bit rate editing (not involving compression coding but involving video encapsulation), but limited by the current device hardware per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/33
CPCH04N19/33
Inventor 王炜张金沙张旭于洋
Owner CHENGDU SOBEY DIGITAL TECH CO LTD
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