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Encoding mode determining method and device

A coding mode and mode technology, applied in the field of image processing, can solve problems such as low coding efficiency

Active Publication Date: 2018-06-12
BEIJING QIYI CENTURY SCI & TECH CO LTD
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  • Application Information

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Problems solved by technology

[0004] However, the intra prediction mode contains 35 different prediction modes, and the inter prediction mode contains 7 prediction modes, and there are many possible combinations. In this way, it is necessary to calculate the distortion rates of all possible coding modes or coding mode combinations first, and then Then select a coding mode or coding mode group with the smallest distortion rate to encode the CU, resulting in low coding efficiency

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  • Encoding mode determining method and device
  • Encoding mode determining method and device

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0053] The embodiment of the present invention also provides a method for determining an encoding mode, and the method is applied to an encoding device. The encoding device may be a terminal or a server, or may be an encoder set in the terminal or the server.

[0054] Step 110, acquiring a coding unit to be coded.

[0055] Wherein, the coding unit is obtained by dividing the target image to be coded.

[0056] In implementation, when a certain image needs to be encoded, the encoding...

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Abstract

The embodiment of the invention provides an encoding mode determining method and device, and belongs to the technical field of image processing. The method comprises the steps of obtaining an encodingunit to be encoded, wherein the encoding unit is obtained by dividing target images to be encoded, according to a rate-distortion cost algorithm of a preset combination mode, the encoding unit and preset inter-frame prediction modes, calculating the rate-distortion cost corresponding to each inter-frame prediction mode, and the number of non-zero quantization transformation coefficients corresponding to each rate-distortion cost, in each calculated rate-distortion cost, determining the best rate-distortion cost and the first number of non-zero quantization transformation coefficients corresponding to the best rate-distortion cost, and if the best rate-distortion cost and the first number meet preset first screening conditions, adopting the target inter-frame prediction mode correspondingto the best rate-distortion cost as the encoding mode of the encoding unit. By adopting the method and device, the encoding efficiency can be improved.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a method and device for determining an encoding mode. Background technique [0002] Due to the popularization of high-resolution shooting equipment, the volume of Internet video has increased rapidly. In order to efficiently store and transmit high-definition video, people usually use a new generation of video coding standards with higher compression coding efficiency to compress video, such as HEVC / H.265. [0003] In high-efficiency video coding, an encoder divides an image to be encoded into coding tree units (ie, CTUs), and then encodes them one by one. The CTU size is determined by the encoder. For the highest encoding efficiency, the CTU is generally set to its maximum size of 64x64. The encoder usually divides the CTU into coding units (CUs) in the form of a quadtree, and then determines the coding mode to encode the CUs. CU can have four sizes of 64x6...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/11H04N19/122H04N19/147
CPCH04N19/11H04N19/122H04N19/147
Inventor 朱洪波
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD