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A method for processing I-blocks used with motion compensated temporal filtering

A technology in time and space, applied in closed-circuit television systems and other directions, can solve problems such as poor matching and low coding efficiency

Inactive Publication Date: 2006-07-19
RENESSELAER POLYTECHNIC INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This poor match can also be caused by other effects such as expanding or compressing the observed image domain
The resulting poor matching leads not only to low coding efficiency, but also to artifacts in the low frame-rate video output from MCTF

Method used

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  • A method for processing I-blocks used with motion compensated temporal filtering
  • A method for processing I-blocks used with motion compensated temporal filtering
  • A method for processing I-blocks used with motion compensated temporal filtering

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Embodiment Construction

[0047] The detailed description of the invention is divided into the following sections: Introduction; Definitions; Motion Compensated Temporal Filtering (MCTF); Processing I-blocks;

[0048] introduction

[0049] Video compression schemes may eliminate redundant information from an input video signal before it is transmitted by encoding frames of the input video signal into compressed information representing an approximate image comprised by the frame of the input video signal. After the compressed information is sent to its destination, the video signal is reconstructed by decoding an approximate image from the compressed information. Due to temporal redundancy, pixel values ​​are not independent, but are associated with their adjacent intersecting consecutive frames of the input video signal.

[0050] In Motion Graphics Experts Group (MPEG) hybrid coding, temporal redundancy can be eliminated by Motion Compensated Prediction (MCP). A video signal is usually divided into ...

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Abstract

A method, system, computer program product, and computer system for processing video frames. Frames A and B of a pair of successive video frames each comprise blocks of pixels. Frame A is earlier in time than frame B. A connection state of each pixel in frame B relative to the pixels of frame A is determined. The connection state is a connected state or an unconnected state. Each block in frame B is classified as either unconnected or uni-connected. Uni-connected blocks in frame B satisfying a reclassification criteria are reclassified as being unconnected. Each unconnected block in frame B is categorized as being a P-block or an I-block. Values for the pixels of each I-block in frame B are calculated by spatial Interpolation based on values of nearest available neighbor pixels relative to each I-block. A residual error block for each I-block in frame B is generated.

Description

technical field [0001] The present invention relates generally to methods, systems, computer program products and computer systems for processing video frames, and more particularly to methods, systems, computer program products and computer systems for processing I-blocks used in Motion Compensated Temporal Filtering (MCTF) . Background technique [0002] Current methods of performing motion compensated temporal filtering (MCTF) on pixels in consecutive video frames produce poor matches between pixels in consecutive frames due to the coverage and non-coverage of spatial regions as multiple frames progress in time. This poor match may be caused by the presence or absence of certain objects or parts of objects as a result of occlusion effects passed as objects ahead of each other as time progresses. This poor match may also be caused by other effects such as expanding or compressing the observed image domain. The resulting poor matching not only leads to low coding efficien...

Claims

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Application Information

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IPC IPC(8): H04N7/18
Inventor 约翰·W·伍兹陈培松吴勇军
Owner RENESSELAER POLYTECHNIC INST
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