Decoding method, encoding method, decoding device and encoding device
A decoding method and pixel signal technology, applied in the field of encoding method, decoding method, decoding equipment and encoding equipment, can solve the problems of high data correlation and large bit volume, and achieve high encoding efficiency, improved accuracy, and DC component residual small effect
Active Publication Date: 2020-03-20
HUAWEI TECH CO LTD
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Problems solved by technology
The reason for transform coding is: video image data often has a large data correlation in the spatial domain, resulting in the existence of a large amount of redundant information, and direct coding requires a large amount of bits
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[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0065] figure 1 is a schematic block diagram of a video codec apparatus or electronic device 50 that may incorporate a codec according to an embodiment of the present invention. figure 2 is a schematic device diagram for video encoding according to an embodiment of the present invention. will be explained below figure 1 and figure 2 unit in .
[0066] The electronic device 50 may be, for example, a mobile terminal or user equipment of a wire...
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Provided are a decoding method, an encoding method, a decoding apparatus, and an encoding apparatus. The decoding method comprises: acquiring, from a code stream, a residual value of an alternating current (AC) component and a residual value of a direct current (DC) component of a transformation quantization coefficient of a target image block; performing inverse quantization and inverse transformation on the AC component and a preset DC component to obtain a transitional reconstructed image block for the target image block; determining, according to similarity between pixels in the transitional reconstructed image block and pixels in a reference pixel region of the target image block, a predicted value for the DC component of the transformation quantization coefficient of the target image block; determining, according to the predicted value for the DC component and the residual value of the DC component, an original DC component of the target image block; and performing inverse quantization and inverse transformation on the original DC component and the AC component of the target image block to obtain a residual signal of the target image block, and decoding the target image block according to the residual signal.
Description
technical field [0001] Embodiments of the present invention relate to the field of video codec and compression, and more specifically, relate to a decoding method, an encoding method, a decoding device, and an encoding device. Background technique [0002] Digital video capabilities can be incorporated into a wide range of devices, including digital television, digital broadcast systems, wireless broadcast systems, personal digital assistants (PDAs), laptop or desktop computers, tablet computers, e-book readers, digital Cameras, digital recording devices, digital media players, video game devices, video game consoles, cellular or satellite radiotelephones, video conferencing devices, video streaming devices, and more. Digital video devices implement video compression techniques such as MPEG-2, MPEG-4, ITU-TH.263, ITU-TH.264 / MPEG-4 Part 10 Advanced Video Codec (AVC), ITU-TH.265 High The Efficiency Video Codec (HEVC) standard defines the standard and those video compression t...
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IPC IPC(8): H04N19/137H04N19/176H04N19/13H04N19/61
CPCH04N19/13H04N19/137H04N19/176H04N19/61
Inventor 曾兵陈宸朱树元缪泽翔张红赵寅
Owner HUAWEI TECH CO LTD