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Device and method for fast selecting video coding mode

A mode selection and video encoding technology, applied in the field of video encoding, can solve the problems of decreased encoding efficiency and inaccurate encoding mode selection, and achieve the effect of improving accuracy

Active Publication Date: 2009-10-21
TENCENT TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0006] However, since the fixed threshold is obtained through encoding and training of other video sequences, if the threshold is not suitable for the currently encoded video sequence, it may happen that the current frame is actually suitable for the intra-frame coding mode, but due to the optimal inter-frame coding mode The cost is less than the threshold and the intra-frame coding mode is not used, resulting in inaccurate selection of the coding mode, resulting in a decrease in coding efficiency

Method used

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  • Device and method for fast selecting video coding mode
  • Device and method for fast selecting video coding mode
  • Device and method for fast selecting video coding mode

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Embodiment Construction

[0032] figure 1 A video coding fast mode selection device in an embodiment is shown. The device includes a threshold adjustment unit 100 and a mode selection unit 200, wherein:

[0033] The threshold adjustment unit 100 is configured to adjust the cost threshold of the current frame according to the optimal inter-frame coding cost distribution of the intra-predicted macroblock of the previous frame; the mode selection unit 200 is connected to the threshold adjustment unit 100 and is used to perform the adjustment of each macroblock. When encoding, calculate the inter-frame coding cost in each macro-block segmentation mode of the current macroblock, and select the inter-frame coding mode with the smallest cost as the optimal inter-frame coding mode, and when the cost of the optimal inter-frame coding mode is less than the stated When the cost threshold is used, the optimal inter-frame coding mode is selected as the coding mode of the current macroblock.

[0034] figure 2 The in...

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Abstract

The invention provides a device and a method for fast selecting a video coding mode. The method comprises the following steps: adjusting the cost threshold value of a current frame according to the optimal interframe coding cost distribution of an intra-frame prediction macro block of a previous frame; selecting the mode of the each macro block of the current frame as follows: computing the interframe coding cost of the current macro block under each macro block mode and selecting the interframe coding mode with lowest cost as an optimal interframe coding mode; and when the cost of the optimal interframe coding mode is less than the cost threshold value, selecting the optimal interframe coding mode as the coding mode of the current macro block. With the device and the method for selecting the video coding quick mode adopted, the accuracy for selecting the coding mode can be improved.

Description

Technical field [0001] The present invention relates to the technical field of video coding, and more specifically, to a video coding fast mode selection device and method. Background technique [0002] The purpose of video coding is to compress video data. The commonly used video coding technology is to perform predictive coding on the video sequence first, and then transmit the difference signal between the image pixel and its predicted value to remove the spatial or temporal correlation to achieve the purpose of compression. Predictive coding includes intra-frame predictive coding and inter-frame predictive coding. Intra-frame predictive coding uses pixel values ​​in the same frame for prediction, and inter-frame predictive coding uses pixel values ​​in adjacent frames for prediction. [0003] Due to the difference in the content of the video image area, in order to obtain the highest possible compression efficiency, each of the inter-frames (frames using forward predictive co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N19/176H04N19/51H04N19/56H04N19/61
Inventor 谷沉沉
Owner TENCENT TECH (SHENZHEN) CO LTD
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