Video decoding method

a video decoding and video technology, applied in the field of video decoding, can solve the problem of high-level syntax error and syntax error

Inactive Publication Date: 2010-06-24
XUESHAN TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011]According to still another aspect of the invention, a video decoding method is disclosed, comprising providing a historical syntax element of a previous video frame, receiving a current video frame to determine a current syntax element therein, determining whether a high-level syntax error is present in the current syntax element, upon detection of the high-level syntax error, determining a replaced syntax element according to the historical syntax element to replace the current error syntax element, decoding the syntax-replaced current video frame to detect whether there is a missing video frame or an undecodable video frame, and upon detection of the missing video frame or the undecodable video frame, generating a replacement video frame to substitute the missing or the undecodable video frame. The high-level syntax error is a syntax error above a Macroblock layer.

Problems solved by technology

The high-level syntax error is a syntax error above a Macroblock layer.

Method used

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Embodiment Construction

[0036]The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.

[0037]The video decoding scheme embodiments disclosed herein fully comply with the Moving Picture Expert Group MPEG Standards.

[0038]When a video decoder decodes and plays video data, the decoding order and the display order may be different, as shown in FIGS. 1a and 1b. FIG. 1a shows groups of pictures (GOP) in a display order and FIG. 1b shows groups of pictures in a decoding order. The groups of pictures of FIGS. 1a and 1b comprise frame sequences of intra (I-frame), prediction (P-frame), or bidirectional (B-frame) frames, wherein each video frame is displayed at a fixed interval, and each video frame is represented by a letter indicating the type of frame and a numb...

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Abstract

Video decoding methods are disclosed. The video decoding method comprises providing a historical syntax element of a previous video frame, receiving a current video frame to determine a current syntax element therein, determining whether a high-level syntax error is present in the current syntax element, wherein upon detection of the high-level syntax error, determining a replacement syntax element according to the historical syntax element to replace the current syntax element, decoding the replaced current video frame to detect whether there is a missing video frame or undecodable video frame, and upon detection of the missing video frame or undecodable video frame, generating a replacement video frame to substitute for the missing or the undecodable video frame.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates in general to video decoding, and in particular, to a video decoding method capable of detecting and correcting missing or undecodable video frames.[0003]2. Description of the Related Art[0004]Various functionalities are implemented in video apparatuses in order to conveniently manipulate video data. Video CODECs (encoders / decoders) typically comply with video coding standards such as MPEG 1 / 2 / 4 and H.26x to perform digital data manipulation and compression. These compression techniques achieve relatively high compression ratios by discrete cosine transform (DCT) techniques and motion compensation (MC) techniques, so that the compressed video streams can be transmitted across various digital networks or stored in various storage medium in an efficient manner.[0005]However, since MPEG 1 / 2 / 4 and H.26x video encoding employs compression schemes which encode later video frames based on earlier video fr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N11/02H04N19/89
CPCH04N19/70H04N19/577H04N19/895H04N19/44H04N19/172H04N19/513
Inventor CHEN, YING-JUIWU, CHUNG-BINCHUANG, YA-TING
Owner XUESHAN TECH INC
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