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Video data encoding and decoding method and device as well as transform processing method and device

A technology of video data and encoding method, which is applied in the field of communication, and can solve problems such as wasting known information and reducing encoding efficiency

Active Publication Date: 2011-10-12
MIGU CO LTD
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  • Application Information

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Problems solved by technology

In prior art 2, some bits are wasted in the encoding process to transmit some known information, which reduces the encoding efficiency

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  • Video data encoding and decoding method and device as well as transform processing method and device
  • Video data encoding and decoding method and device as well as transform processing method and device
  • Video data encoding and decoding method and device as well as transform processing method and device

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Embodiment Construction

[0046] 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 only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0047] In the embodiment of the present invention, the so-called directional transformation base refers to the transformation base with directional characteristics, and the so-called non-directional transformation base refers to the transformation base without directional characteristics. The transformation bases specified in the current standards are all non-directional transformations Base, for example: DCT transform base in H.264 / AVC.

[0048] figure 1 It is a ...

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Abstract

The invention relates to a video data encoding and decoding method and device as well as a transform processing method and device. The video data encoding method comprises the following steps: selecting the best transform base from more than one transform base to be selected; getting the difference information according to the transform base corresponding to the prediction direction and the best transform base, when the prediction direction of the current block is obtained according to the directivity information of a prediction block and / or the directivity information of surrounding reconstruction blocks; writing the difference information into the encoding data; and conducting transform processing according to the best transform base. In the embodiment of the invention, the prediction information is included in the directivity information of the prediction block and / or the directivity information of surrounding reconstruction blocks; and the prediction information can be obtained inencoding and decoding ends without being written into the encoding data, thus reducing the information needing to be transmitted, saving encoding bit and improving encoding efficiency.

Description

technical field [0001] The present invention relates to the communication field, in particular to a video data encoding and decoding method and device, and a transformation processing method and device. Background technique [0002] Transform coding technology is a technology that maps pixels related to the spatial domain to another orthogonal vector space (transform domain or frequency domain) to reduce the correlation between transformed coefficients. It eliminates image data through signal transformation. spatial correlation. In image and video transform coding technology, transform is usually used to transform data with large correlation into data with small correlation, and compress energy into a few low-frequency coefficients, which will be beneficial to subsequent quantization, ZigZag Scanning and entropy encoding links. [0003] However, due to the existing mainstream video coding and decoding technologies, such as H.264, etc., all adopt a hybrid coding framework t...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50
CPCH04N19/122
Inventor 杨海涛宋锦于浩平區子廉
Owner MIGU CO LTD
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