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An entropy decoding bit parsing method, an entropy decoder, and a video decoding chip

A technology of bit analysis and entropy decoding, which is applied in the field of terminal video decoding to achieve the effect of improving efficiency

Inactive Publication Date: 2013-06-19
WUXI ZGMICRO ELECTRONICS CO LTD
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Problems solved by technology

[0014] Secondly, when the number of remaining data bits in buffer (a) is less than N, it is necessary to perform the splicing operation of the data in the two buffers, which is also a time-consuming factor

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  • An entropy decoding bit parsing method, an entropy decoder, and a video decoding chip
  • An entropy decoding bit parsing method, an entropy decoder, and a video decoding chip
  • An entropy decoding bit parsing method, an entropy decoder, and a video decoding chip

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Embodiment Construction

[0051] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] The core idea of ​​the present invention is: because the bit analysis operation of entropy decoding is generally carried out for the first buffer, so the present invention adopts certain measures to ensure that the data stored in the first buffer is always fully loaded, and the entropy decoding The data read by the second bit analysis operation will not exceed a certain threshold (for example, 32 bits), that is, the data stored when the first buffer is full, so after applying the present invention, there will be no data before the data is read. It is necessary to judge whether the data stored in the first buffer meets requirements, that is, the judgment operation is saved, and the efficiency of entropy decoding bit parsing o...

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Abstract

The invention provides a method for analyzing entropy decoding bits of a video code stream, which comprises the following steps: determining the bit digit N required to be read by the current entropy decoding according to the video code stream, wherein N is less than or equal to a threshold value M; reading N bit data required by the current entropy decoding from a first buffer to perform the entropy decoding; moving the residual data in the first buffer forwards to a starting position, and filling the data in a second buffer in idle bits of the first buffer to ensure that the first buffer isfully loaded; and when a preset condition is satisfied, reading the data of an external video code stream to the second buffer, wherein the storage spaces of the first buffer and the second buffer are more than or equal to M bits. The method ensures that the buffer (a) (namely the first buffer) is fully loaded to read the bit data so that the operations for determining whether the residual data in the buffer (a) is more than or equal to N can be notably reduced, thus the reading efficiency is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of terminal video decoding, in particular to an entropy decoding bit parsing method for a video code stream, an entropy decoder, and a video decoding chip. Background technique [0002] With the development of science and technology, digital mobile multimedia has become increasingly widely used by the public. Digital mobile multimedia provides digital audio, video and information services to various portable terminal devices through the wireless broadcasting and TV coverage network. Its terminal products mainly include MP4, mobile phones, GPS, USB receiving sticks, independent receivers and so on. The premise of digital information transmission, storage, playback and other links is digital audio and video codec technology, that is, digital audio and video codec technology is the common basic standard of the digital audio and video industry. At present, the digital audio and video codec standards of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/30H04N19/13H04N19/176H04N19/44H04N19/503H04N19/593H04N19/60H04N19/91
Inventor 季鹏飞
Owner WUXI ZGMICRO ELECTRONICS CO LTD
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