| 摘要 |
Systems and methods for reducing a bit-rate in a multimedia data stream while maintaining high image quality. Two consecutive frames of the multimedia data stream are spatially filtered, temporally filtered, and combined into a pre-processed frame. In one embodiment, the two consecutive frames are consecutive fields of an interlaced data stream that are deinterlaced by the spatial and temporal filtering process. The pre-processed frame is encoded multiple times using different quantization values to produce a plurality of encoded frames. One of the encoded frames is selected based on its image quality and/or size for inclusion in an encoded data stream. In one embodiment, the pre-processed frame undergoes a motion estimation method that performs an integer level search of overlapping locations around a co-located macroblock in a reference frame followed by a sub-pixel level diamond pattern search.
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