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Device for video decoding

a video decoding and video technology, applied in the field of video decoding devices, can solve the problems of limiting the data throughput in the unit time, inefficient to take three periods of time to decode symbols, and bottlenecks in calculation operations, so as to reduce the time of decoding and enhance efficiency

Inactive Publication Date: 2008-03-13
NATIONAL CHUNG CHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enhances the overall throughput rate by reducing decoding time and power consumption, enabling the decoding of multiple symbols in a single period and improving the economic performance by up to 61.4% compared to conventional methods.

Problems solved by technology

This process limits the data throughput in the unit time.
This limitation is a bottleneck in calculating operations and a problem must to be solved in CABAC decoding design.
It is inefficient to take three periods of time to decode a symbol.

Method used

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Embodiment Construction

[0030]Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

[0031]While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the invention will be better understood from a consideration of the following description in conjunction with the figures, in which like reference numerals are carried forward.

[0032]Refer to FIG. 3. FIG. 3 shows a schematic block diagram of CABAC in the decoding system level of the preferred embodiment of the present invention. The decoding system includes a CABAC decoding core 100, a bit-stream manager 110, a syntax parser 120, a system controller 130, syntax info memory of a macroblock 140 and coefficient memory of a macroblock 150.

[0033]At first, the bit-stream...

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Abstract

A device for video decoding is disclosed. It includes at least a pipeline scheduler, a decoding core, a segmented context memory and a context cache. The pipeline scheduler and the decoding core could decrease the time taken in a code-decoding period. The segmented context memory and the context cache could reduce accessing time of reading and writing context values.

Description

BACKGROUND[0001]1. Field of Invention[0002]The present invention relates to a device for video decoding. More particularly, the present invention relates to a device for decreasing the calculated amount of entropy coding in H.264 / AVC video decoding standard.[0003]2. Description of Related Art[0004]There are two kinds of new H.264 / AVC video decoding standard Entropy Coding algorithms. One is suitable for Context Adaptive Variable Length Coding (CAVLC) in Baseline Profile. The other is suitable for Context-based Adaptive Binary Arithmetic Coding (CABAC) in main profile.[0005]Because CABAC refers to the context in the content, it is a more suitable way to code and enhance the efficiency of coding according to the probability distribution. CABAC uses the just coded symbols to estimate the probability for the next symbol to show up, and tremendously reduces the burdens between the symbols and with mobility adjusts every code of symbol to match the probability distribution. Therefore the ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03M7/00
CPCH04N19/13H04N19/42H04N19/61
Inventor GUO, JIUN-INYANG, YAO-CHANG
Owner NATIONAL CHUNG CHENG UNIV