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Equipment and method for performing geometric transformation in video rendition

A technology of geometric transformation and reproduction equipment, applied in the direction of digital video signal modification, television, graphics and image conversion, etc., can solve problems such as increasing the bandwidth load of the decoder

Inactive Publication Date: 2008-07-23
FREESCALE SEMICON INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The display memory 203 and the current decoded frame memory 201 are respectively different memory buffers, resulting in one more frame buffer allocation, while increasing the bandwidth load of the decoder

Method used

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  • Equipment and method for performing geometric transformation in video rendition
  • Equipment and method for performing geometric transformation in video rendition
  • Equipment and method for performing geometric transformation in video rendition

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Embodiment Construction

[0021] The basic idea of ​​rotation and mirroring in the loop of the present invention is as follows image 3 shown. According to the present invention, the video decoder 300 performs the rotation and mirroring functions as part of the inverse transform / processing, using the enhanced inter / intra reconstruction means 301 . The rotation and mirroring unit 302 performs the rotation or mirroring, and the enhanced inter / intra reconstruction means 301 is based on the reference frame after rotation / mirror and the motion vector (or the modified motion vector according to the rotation or mirroring performed in the rotation and mirroring unit 302) called prediction direction) to perform inter / intra reconstruction.

[0022] Since the decoded frame (including the reference frame and the current decoded frame to be displayed) has been rotated or mirrored, the current decoded frame memory and the display memory correspond to the same memory 303 . In this way, compared to the conventional ...

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Abstract

Discloses are a method and a device of proceeding geometric transformation in a video reappearance, wherein the method comprises entropy decoding, reordering, quantizing in reverse, inverse transformation, inter-frame / intra-frame reconstruction, compensating reconstructed frame by using matrix sequence which is obtained after the step of inverse transformation, and proceeding geometric transformation to the matrix sequence after the reordering step and before the compensating step. The step of the inter-frame / intra-frame reconstruction is configured to geometric transformation which leads the forecasting direction and the reference pixel location adapts the step of geometric transformation.

Description

technical field [0001] The present invention relates to video reproduction, in particular to a geometric transformation method in video reproduction and a video reproduction device. Background technique [0002] Many current consumer electronic devices support rotation and mirroring, ie, rotating / flipping video frames by a specific angle / orientation specified by the application. In most video applications, rotation refers to left and right 90, 180, and 270 degree transformations, and mirroring refers to horizontal and vertical transformations, such as figure 1 shown. Of course, the rotation and mirroring can also be any other angle and / or orientation. Rotation and mirroring are not part of video processing standards such as H.264 / AVC, MPEG2, MPEG4, etc., but are usually part of pre- or post-processing of video frames. [0003] A conventional video decoding architecture related to inter / intra reconstruction processing of frames is illustrated in FIG. 2 . As shown in FIG. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/26
CPCH04N19/00781G06T3/60H04N19/00533H04N19/61H04N19/44
Inventor 周莉
Owner FREESCALE SEMICON INC
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