A method for hiding time domain error in video decoding
An error concealment, video decoding technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve problems such as being unsuitable for real-time applications, high computational complexity, unable to effectively lose macroblock motion vector estimation, etc. The effect of excellent evaluation, real-time satisfaction, and strong practical value
Active Publication Date: 2010-09-22
ZTE CORP
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To sum up, there are two shortcomings in the existing time-domain error concealment methods based on motion compensation: 1) The adjacent macroblock information of the missing macroblock must be used. If the adjacent macroblock cannot be decoded correctly, it cannot effectively Carry out the motion vector estimation of the lost macroblock; 2) Although the search and comparison block matching can get better results, the computational complexity is too large, so it is not suitable for real-time applications
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[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] The time-domain error concealment method described in the present invention can be specifically divided into damaged macroblock positioning and error concealment for the damaged macroblock according to its characteristics, including the following steps (such as figure 1 shown):
[0030] Step 110, read and parse the code stream, and detect whether there is an error in the image frame in the code stream, and mark the damaged macroblock;
[0031] If the processing of the current frame is completed, then enter the processing of the next frame image.
[0032] Code stream errors may include frame loss, packet loss, and code stream errors. Concrete code stream error detection method is not within the scope of discussion of the present invention, and a kind of feasible error detection method is as follows:
[0033] (1) a correct dec...
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The invention discloses a video decoding time domain error concealment method. The error concealment effect is good, and the calculation complexity is low. The invention comprises the following steps: step a, a code stream is read and analyzed, whether an image frame has an error in the code stream or not is detected, and damaged micro blocks are marked; step b, if the damaged micro blocks exist in the current frame, the next frame is analyzed to obtain micro block information to switch to step c, or else, a normal decoding flow is operated and the step d are carried out; step c, to the damaged micro blocks in the current frame, a motion vector is estimated by utilizing the frame or the corresponding micro blocks of the former or latter frame, the block of the corresponding position is searched in the former frame according to the estimating result, and the damaged micro blocks are replaced with the corresponding micro blocks; step d, an image data which is normally decoded and on which the error concealment is operated. The invention overcomes the disadvantage that the complexity is higher in the prior art, and the image damage caused by the data loss can be concealed as far as possible.
Description
technical field [0001] The invention belongs to the field of image information processing, and in particular relates to a time-domain error concealment method for video decoding. Background technique [0002] With the development of wired broadband network and wireless network and the drive of user needs, multimedia technology and related applications have received more and more attention, and are considered to be one of the mainstream applications of high-speed networks in the future. Compared with traditional Internet applications such as WWW and E-mail, multimedia applications, especially video applications, have stricter real-time requirements and greater bandwidth requirements. Since most video applications use high-compression coding technology, the requirements for transmission errors are particularly stringent, but wired or wireless networks do not provide QoS (Quality of Servers) guarantees for transmission, so video applications are more resistant to transmission e...
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IPC IPC(8): H04N7/68H04N7/26H04N19/895
Inventor 陈睿黄晓红王宁
Owner ZTE CORP