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Context-adaptive variable-length coding method and apparatus thereof

An encoding method and adaptive technology, applied in the field of video encoding, can solve problems such as low compression efficiency, and achieve the effect of improving compression efficiency

Active Publication Date: 2012-03-14
MIGU CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Embodiments of the present invention provide a CAVLC method and device to solve the problem of low compression efficiency in the CAVLC method in the prior art and improve compression efficiency

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  • Context-adaptive variable-length coding method and apparatus thereof
  • Context-adaptive variable-length coding method and apparatus thereof
  • Context-adaptive variable-length coding method and apparatus thereof

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0034] Such as figure 1 Shown is the flowchart of the first embodiment of the CAVLC method of the present invention, including:

[0035] Step 101, determine the code table corresponding to the non-zero coefficients other than the trailing coefficients of each coding block, determine the order to which each coefficient belongs in each code table, ...

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Abstract

The invention provides a context-adaptive variable-length coding (CAVLC) method and an apparatus thereof. The method comprises the following steps that: a code list corresponded to nonzero coefficients of all encoding blocks except trailing coefficients is determined; the number of nonzero coefficients in the code list is calculated, wherein the nonzero coefficients are corresponded to all levels; and all the levels in the code list are arranged again in a descending order according to the number of the nonzero coefficients; coding is carried out on the number of the nonzero coefficients and the number of the trailing coefficients; coding is carried out on amplitudes of the nonzero coefficients except the trailing coefficients according to the rearranged code list; and coding is carried out on the number of zeroes before the last nonzero coefficient and the number of continuous zeros before each of the nonzero coefficient. According to the embodiment of the invention, a problem of low compression efficiency in CAVLC in the prior art can be solved; and thus the compression efficiency is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of video coding, and in particular, to a method and device for Context-Adaptive Variable-Length Coding (Context-Adaptive Variable-Length Coding, CAVLC for short). Background technique [0002] With the development of broadband networks and the improvement of user needs, multimedia technology and its related applications have received more and more attention. Multimedia technology is considered to be one of the mainstream applications of high-speed networks in the future. IP-based multimedia applications are divided into three categories: one is interactive applications, such as video telephony and video conferencing; the other is downloading of encoded video streams; and the other is IP-based video streams. [0003] Compared with traditional applications, multimedia applications have stricter real-time requirements and greater demands on bandwidth. For wireless communication, as the nu...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/30H04N19/13H04N19/91
Inventor 梁文亮沈海华卢磊
Owner MIGU CO LTD
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