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Method, device and terminal for generating quantization parameters in image coding

A technology of image coding and quantization parameters, which is applied in the field of image coding and can solve problems such as the inability to meet the requirements of image size

Active Publication Date: 2021-12-14
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present application provides a method, device, and terminal for generating quantization parameters in image coding, so as to solve the problem that the quantization parameters obtained by the existing quantization parameter generation methods cannot meet the requirements for the size of the encoded image

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  • Method, device and terminal for generating quantization parameters in image coding
  • Method, device and terminal for generating quantization parameters in image coding
  • Method, device and terminal for generating quantization parameters in image coding

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Embodiment Construction

[0040] When using the HEVC / H.265 encoder to encode a single-frame image, in order to obtain a suitable quantization parameter so that the size of the encoded image according to the quantization parameter meets the expected requirements, the inventors of the present application tried to find the following solution: according to the preset The image size (i.e. the expected encoded image size) generates the quantization parameters required for encoding. Since there is no open relevant technical revelation at present, when the HEVC / H.265 standard is applied to video coding, in the video rate control algorithm, it involves the setting of the quantization parameters of the initial I frame, and the initial I frame Among the many setting methods of quantization parameters, the method of setting quantization parameters using the relationship model between the code stream and the quantization parameters involves setting the quantization parameters according to the code stream. Therefore,...

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Abstract

The embodiment of the present application discloses a method, device, and terminal for generating quantization parameters in image coding. A relationship model between quantization parameters used in image encoding; obtaining the multi-scale texture complexity and preset image size of the image to be encoded; using the relationship model to generate the multi-scale texture complexity and preset image size of the image to be encoded The quantization parameter corresponding to the image size. The relationship model used in the generation method reflects the texture features of the image more accurately, so that the quantization parameters of the image to be encoded generated using the relationship model are more accurate, thereby reducing the number of times after encoding the image to be encoded using the quantization parameter. The error between the actual image size and the preset image size can be used to obtain an encoded image that is more in line with the expected image size.

Description

technical field [0001] The embodiments of the present application relate to the technical field of image coding, and in particular, to a method, device, and terminal for generating quantization parameters in image coding. Background technique [0002] HEVC / H.265 standard, that is, High Efficiency Video Coding (High Efficiency Video Coding) standard, compared with traditional video coding standards, its compression rate and image quality have been greatly improved. Therefore, HEVC / H.265 standard has become the current Commonly used video coding standards. The HEVC / H.265 standard can also be used to encode single-frame images, and the commonly used encoding tool for encoding is the HEVC / H.265 encoder. [0003] When using the HEVC / H.265 encoder to encode a single frame image, it is necessary to set the quantization parameter (English: Quantization Parameter, abbreviation: QP). By setting different quantization parameters, the encoder can output the same image when the input im...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/124H04N19/137
CPCH04N19/124H04N19/137
Inventor 郭俊元
Owner HUAWEI TECH CO LTD