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Image coding method and device, and image decoding method and device

A technology of image coding and coding blocks, which is applied in image coding, image communication, image data processing, etc., can solve the problems of low efficiency, achieve the effect of overcoming low efficiency, improving coding compression efficiency and decoding and decompression efficiency

Active Publication Date: 2016-08-17
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The present invention provides an image coding method and device, and an image decoding method and device to at least solve the problem of low efficiency caused by scanning in a fixed way in related coding / decoding technologies

Method used

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  • Image coding method and device, and image decoding method and device
  • Image coding method and device, and image decoding method and device
  • Image coding method and device, and image decoding method and device

Examples

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Embodiment 1

[0068] In this embodiment, an image coding method is provided, figure 2 is a flow chart of an optional image coding method according to an embodiment of the present invention, such as figure 2 As shown, the process includes the following steps:

[0069] S202. Determine the scanning mode parameters of the encoding block, where the scanning mode parameters include at least one of the following: an area indication parameter for determining the scanning area of ​​the encoding block, and a scanning indication for determining the scanning order of pixels in the scanning area of ​​the encoding block parameter;

[0070] S204. Determine the predicted values ​​of some or all pixels in the coding block according to the scanning mode parameters;

[0071] S206. Encode the encoding block according to the predicted value, and write the encoded encoding result into the code stream.

[0072] Optionally, in this embodiment, the above-mentioned image coding method can be applied to the vide...

Embodiment 2

[0157] In this embodiment, an image decoding method is provided, Figure 10 is a flowchart of an optional image decoding method according to an embodiment of the present invention, such as Figure 10 As shown, the process includes the following steps:

[0158] S1002, analyzing the code stream to obtain decoding parameters of the decoding block;

[0159] S1004. Obtain scan mode parameters according to the decoding parameters, where the scan mode parameters include: an area indication parameter used to determine the scan area of ​​the decoded block, and / or a scan indication parameter used to determine the scan order of pixels in the scan area;

[0160] S1006. Determine reconstruction values ​​of some or all pixels in the decoded block according to the area indication parameter and / or the scan indication parameter.

[0161] Optionally, in this embodiment, the above-mentioned image decoding method can be applied to the video image decoding process, but not limited to, for exampl...

Embodiment 3

[0242] In this embodiment, an image encoding device is also provided, which is used to implement the above embodiments and preferred implementation modes, and what has been described will not be repeated here. As used below, the term "module" may be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

[0243] In this embodiment, an image encoding device is provided, Figure 11 is a schematic diagram of an optional image encoding device according to an embodiment of the present invention, such as Figure 11 shown, including:

[0244] 1) The first determining unit 1102 is configured to determine the scanning mode parameters of the coding block, wherein the scanning mode parameters include at least one of the following: an area indication parame...

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Abstract

The invention provides an image coding method and device, and an image decoding method and device, wherein the coding method comprises following steps of determining scanning mode parameters of a coding block, wherein the scanning mode parameters comprise at least one as follows: region indication parameters for determining the scanning region of the coding block, and scanning indication parameters for determining the scanning sequence of the pixels in the scanning region of the coding block; determining prediction values of partial or all pixels in the coding block according to the scanning mode parameters; coding the coding block according to the prediction values; and writing the coded coding results in code streams. Through adoption of the methods and the devices, the problem that in the related coding / decoding technique, the efficiency is relatively low due to the fact that scanning only can be carried out by a fixed mode is solved, and the coding compression efficiency and the decoding and decompression effects are improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to an image encoding method and device, and an image decoding method and device. Background technique [0002] As TVs and monitors enter ultra-high-definition (4K) and ultra-high-definition (8K) resolutions, as well as the development and popularization of a new generation of cloud computing and information processing models and platforms with remote desktops as a typical form, the video image The need for data compression is also moving towards higher resolutions and composite images that include camera ingested images and computer screen images. It has become an indispensable technology to perform ultra-high compression ratio and extremely high-quality data compression on video images. [0003] Make full use of the characteristics of 4K / 8K images and computer screen images to compress video images with high efficiency. It is also the latest international video compression stand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/129H04N19/176H04N19/117
CPCH04N19/117H04N19/129H04N19/176H04N19/593H04N19/14H04N19/182H04N19/136G06T9/004H04N19/44
Inventor 林涛李明尚国强吴钊
Owner TONGJI UNIV
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