Video transcoding processing method and video transcoding processing device from MPEG2 format or H. 263 format to H. 264 format
A technology of video conversion and processing method, which is applied in the field of video coding, can solve the problems of loss of converted image quality, less inter-frame prediction modes, and small amount of information, etc., and achieves good conversion time and video image quality, conversion time and video image quality The effect of quality balance and good conversion coding efficiency
Active Publication Date: 2011-08-03
北京中电慧视科技有限公司
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When using motion vectors for prediction, due to the problem of constraint accuracy, similar schemes will cause a large loss in the quality of converted images; The amount of available information is not large, so using the previous prediction model alone will also bring a large quality loss
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Embodiment 2
[0108] This embodiment provides a processing device for video conversion encoding from MPEG2 or H.263 format to H.264 format, which is used to implement the processing method given in Embodiment 1, such as Figure 8 As shown, the device includes: an energy judging unit 81, a first processing unit 82 and a second processing unit 83;
[0109] Wherein, the energy judging unit is used to compare the residual energy of a macroblock of the read frame of MPEG2 format or H.263 format video data with the judgment threshold; if the comparison result is that each subblock in the macroblock If the residual energy in the macroblock is less than or equal to the decision threshold, it will be processed by the first processing unit; if the comparison result is that the residual energy in the macroblock is greater than the decision threshold, it will be processed by the second processing unit;
[0110] The first processing unit selects an inter prediction mode for the macroblock within the ran...
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The invention discloses a video transcoding processing method and a video transcoding processing device from MPEG2 format or H.263 format to H.264 format. The video transcoding processing method comprises the following steps: energy judgment step: the residual energy of a macro block for reading the video data is compared with a decision threshold; if the residual energy of each sub-block of the macro block is smaller than or equal to the decision threshold, first treatment is executed; if the residual energy of the macro block is larger than the decision threshold, second treatment is executed; first treatment: the inter-frame prediction mode is selected for the macro block within the range of P16 multiplied by 16, P16 multiplied by 8, P8 multiplied by 16 or P8 multiplied by 8, so that the motion estimation treatment can be subsequently performed to the macro block according to the selected inter-frame prediction mode; second treatment: the motion estimation treatment is performed tothe macro block again to obtain all inter-frame prediction modes of the macro block, the optimal inter-frame prediction mode and the motion vector are selected from the inter-frame prediction modes to perform the motion estimation treatment to the macro block according to the selected inter-frame prediction mode. The video transcoding processing method has high transformation efficiency and good quality.
Description
technical field [0001] The invention belongs to the field of video coding, and in particular relates to a processing method and device for video conversion coding from MPEG2 or H.263 format to H.264 format. Background technique [0002] At present, in the processing of video conversion coding from MPEG2 or H.263 format to H.264 format, most of the methods given in the literature use some information of the macroblock before conversion to predict, such as prediction mode, motion vector, DCT coefficients and so on. When using motion vectors for prediction, due to the problem of constraint accuracy, similar schemes will cause a large loss in the quality of converted images; The amount of available information is not large. Therefore, using the previous prediction mode alone will also bring a large quality loss. Therefore, the methods given in many literatures study the previous DCT coefficients or synthesize several kinds of information to predict the prediction mode and moti...
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IPC IPC(8): H04N7/26H04N7/50H04N19/40
Inventor 张健徐桂忠郭宇张德何永刚范茂军
Owner 北京中电慧视科技有限公司