Patent ID: 8068683
Filing Date: 2011-11-29
Classification: H04N

Abstract:
1. A system, comprising: an input terminal configured to receive a video stream; input hardware having a capture mechanism coupled with the input terminal, and configured to output, in response to a received video stream, a plurality of video frames including a first video frame with a plurality of color format components; a wavelet transformer coupled with the capture mechanism and configured to perform a plurality of levels of wavelet transformation of the first video frame by repeatedly applying asymmetric filtering a number of times to the first video frame that results in a plurality of wavelet transformation coefficients for the color format components of the first video frame, including a plurality of low-frequency coefficients and a plurality of high-frequency coefficients; a comparator coupled with the wavelet transformer, and configured to compare the high-frequency coefficients to corresponding high-frequency coefficients of a current anchor frame as part of a determination to omit or encode the first video frame; and an encoder coupled with wavelet transformer and the comparator, and configured to encode the first video frame if the first video frame is to be encoded, by encoding the low-frequency and high-frequency coefficients, wherein the encoder is configured to encode the high-frequency coefficients in descendant order, with high-frequency coefficients of a higher level wavelet transformation encoded before high-frequency coefficients of a lower level wavelet transformation are encoded, and to encode some non-zero high-frequency coefficients as zeros.