Self-adaptive error concealing method

An error masking and self-adaptive technology, which is applied in the field of video encoding and decoding, can solve the problem of poor I frame error recovery effect, achieve both decoding efficiency and video effect, good visual effect, and improve the effect of error masking

Active Publication Date: 2011-03-16
盐城青墩津邦水务有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the poor problem of I frame error recovery effect existing in the prior art, provide a kind

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Embodiment Construction

[0021] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0022] The adaptive error concealment method of the present invention, as attached figure 1 shown, follow the steps below:

[0023] Step 1. Judging whether the image frame in which an error occurs is an I frame, if yes, go to step 2; if not, use the existing inter-frame error masking method to perform error masking. For P frame or B frame, the method of generating candidate motion vector table is preferred in the present invention, that is, the intermediate value of the decoded macroblock motion vector around the error macroblock, the 0 vector, and the motion vector of the macroblock corresponding to the reference frame are added to a candidate table. The motion vector table performs boundary matching on the macroblock of the reference frame corresponding to the candidate motion vector in the candidate motion vector table, and selects the correspondin...

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Abstract

The invention discloses a self-adaptive error concealing method and belongs to the technical field of video coding and decoding. In the invention, an inter-frame correlation coefficient is introduced to denote the degree of the severity of the change of a scene in the restoration from an error in an I frame, and by comparing the inter-frame correlation coefficient with a preset threshold value, an error concealing means can be selected self-adaptively; moreover, different micro block matching searching means are adopted according to the state of the macro blocks, so the video error concealing effect is improved while the decoding efficiency is taken into consideration. Compared with the prior error concealing method, the method disclosed by the invention has the advantages that: after decoding, a better visual effect can be achieved, and the balance between the decoding efficiency and video effect is taken into consideration.

Description

technical field [0001] The invention relates to an error concealment method, in particular to an adaptive error concealment method, and belongs to the technical field of video coding and decoding. Background technique [0002] In H.26x and MPEG series video coding and decoding technologies, inter-frame prediction is usually used to reduce time redundancy. If a certain frame data is lost, even if the subsequent frame is received correctly, it cannot be decoded correctly. Therefore, for a real-time A video communication system needs to build a set of error masking mechanisms to deal with sudden transmission errors. [0003] Error Concealment means that when a macroblock is lost due to transmission, the decoder can estimate the data of the macroblock from adjacent macroblocks through the correlation between the space domain and the time domain. This technique is called Error masking. Error concealment techniques can be divided into airspace error concealment techniques and ti...

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Application Information

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IPC IPC(8): H04N7/68H04N7/26H04N7/32H04N19/895
Inventor 孙知信周盛
Owner 盐城青墩津邦水务有限公司
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