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Video encoding device, video decoding device, and encoding and decoding methods thereof

A technology of a video encoding and decoding device, which is applied in the field of multimedia signal processing, can solve the problems of reducing the amount of encoding result data, prolonging the encoding operation time, affecting the overall efficiency of the system, etc.

Active Publication Date: 2018-04-24
MEDIATEK INC
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Problems solved by technology

That is to say, in a typical AVS encoding system, although the secondary conversion can contribute to the benefit of reducing the data volume of the encoding result, it will cause the extension of the encoding operation time, thereby affecting the overall efficiency of the system

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  • Video encoding device, video decoding device, and encoding and decoding methods thereof
  • Video encoding device, video decoding device, and encoding and decoding methods thereof
  • Video encoding device, video decoding device, and encoding and decoding methods thereof

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Embodiment Construction

[0029] A specific embodiment according to the present invention is a video encoding device. In practice, the video encoding device can be integrated in various video encoding systems with secondary transform mechanisms, or can exist independently. For ease of description, the following description mainly takes the case where the video coding device is set in the digital audio and video codec technology standard (AVS) coding system as an example, and its partial functional block diagram is shown in image 3 .

[0030] In this embodiment, the intra-frame prediction module 32 is responsible for performing an intra-frame prediction process on each image block in a video frame, so as to generate a luminance residual value block of each image block. The transform module 34 is responsible for applying a primary transform and a secondary transform to the luma residual block. For example, the preliminary transform can be a discrete cosine transform (DCT) or an integer transform trans...

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Abstract

A video encoding apparatus for encoding a plurality of image blocks in a video frame includes an intra-frame prediction module, a transformation module and a quantization module. The intra-frame prediction module performs intra-frame prediction on the image blocks to generate a plurality of residual blocks. The transformation module performs a transformation on a target residual block along a predetermined direction according to a transformation matrix to generate a transformation result. The transformation matrix is a product of an initial transformation matrix and a secondary transformation matrix. The initial transformation matrix corresponds to a one-dimensional initial transform performed along the predetermined direction in a two-dimensional initial transform. The secondary transformation matrix corresponds to a one-dimensional secondary transform performed along the predetermined direction in a two-dimensional secondary transform. The quantization module quantizes the transformation result.

Description

technical field [0001] The present invention is related to multimedia signal processing technology, and especially related to encoding / decoding technology in video system. Background technique [0002] With the advancement of communication technology, digital TV broadcasting is becoming more and more mature and popular. In addition to transmission via cable lines, digital TV signals can also be transmitted in the form of wireless signals through equipment such as base stations or artificial satellites. In order to take into account the needs of improving image quality and reducing the amount of transmitted data, the transmitting end usually encodes and compresses the video and audio signals to be transmitted. Correspondingly, the receiving end must correctly decode and decompress the received signal before it can restore the video and audio signal. [0003] figure 1 A partial functional block diagram of a coding system conforming to the audio video coding standard (AVS) i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/124
CPCH04N19/60H04N19/42H04N19/593
Inventor 林和源
Owner MEDIATEK INC
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