Systems and methods for reducing frame rates in a video data stream
The present invention is related to video encoding. In an embodiment, a sequence of frames is received. For each frame in at least a portion of the sequence of frames, a corresponding mean of absolute differences value weighted by a temporal parameter between frames bracketing said each frame is calculated. At least partly based on the corresponding mean of absolute differences value weighted by a temporal parameter, a first frame in the sequence of frames is skipped.
1 - 19 . (canceled)
20 . A processor circuit configured to select video frames to skip in a sequence of frames, the processor circuit comprising: a first instruction configured to calculate for each frame in at least a portion of the sequence of frames a corresponding mean of absolute differences value weighted by a temporal parameter between frames bracketing said each frame in the portion of the sequence of frames; and a second instruction configured to designate a first frame to be skipped based at least in part on the corresponding mean of absolute differences value weighted by the temporal parameter.
21 . The processor circuit as defined in claim 20 , further comprising a third instruction configured to determine if a target frame rate is met assuming the first frame is skipped.
22 . The processor circuit as defined in claim 20 , further comprising a third instruction configured to limit to a first amount how many consecutive frames can be skipped.
23 . A frame rate control apparatus, comprising: a first instruction configured to receive a frame rate target; a second instruction configured to calculate a first cost function value for a first frame in a sequence of frames, wherein the first cost function value is based at least in part on a first temporal parameter related to a time difference and luminosity differences between frames in the sequence of frames bounding the first frame; a third instruction configured to calculate a second cost function value for a second frame in the sequence of frames, wherein the second cost function based at least in part on a second temporal parameter related to a time difference and luminosity differences between frames in the sequence of frames bounding the second frame; a fourth instruction configured to select for skipping one of the first frame and the second frame based at least in part on the first cost function value and the second cost function value; and a fifth instruction configured to determine if the target frame rate is met with the selected one of the first frame and the second frame skipped.
24 . The frame rate control apparatus as defined in claim 23 , wherein the frame rate control apparatus is an integrated circuit.
25 . The frame rate control apparatus as defined in claim 23 , wherein the luminosity differences between frames bounding the first frame are defined using a mean of average difference function.