Methods and apparatus for transform coefficient filtering

Details Methods and apparatus for transform coefficient filtering Methods and apparatus for transform coefficient filtering

2007-01-09

2007-01-09

Sherali, Ishrat (Department: 2624)

Image analysis

Image compression or coding

Transform coding

Reexamination Certificate

active

09867966

ABSTRACT:
According to the present invention, methods and apparatus for filtering transform coefficients are provided. Transform coefficients associated with an input bit sequence can be zeroed to provide modified transform coefficients associated with an output bit sequence. The transform coefficients may represent information in a portion of data such as a video frame, a picture, or an audio stream. In one example, the transform coefficients are DCT coefficients of an MPEG-2 video sequence. The transform coefficients are filtered to provide modified transform coefficients associated with an output bit sequence. The output bit sequence is a rescaled version of the input bit sequence.

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