发明名称 Two stage video compression method and system
摘要 <p>Methods and systems for encoding data representative of a sequence of video frames for transmission to a decoder. A motion compensated predictive coder (24) substantially losslessly compresses the data, computes a motion vector, and forms an intermediate coded representation which includes the compressed data and the motion vector. A frame detector (26), which detects frames having a prediction error which exceeds a predetermined threshold, is coupled to the motion compensated predictive coder (24). A digital storage device (22) is coupled to the motion compensated predictive coder (24) and the frame detector (26). The digital storage device (22) stores the intermediate coded representation and stores a representation of the frames having the prediction error which exceeds the predetermined threshold. A lossless decoder (29), coupled to the digital storage device (22), substantially losslessly decodes the intermediate coded representation to form a decoded representation. A recoder (28), which compresses the decoded representation at a compression ratio in dependence upon a selectable bit rate for transmission, is coupled to the digital storage device (22) and the lossless decoder (29). <MATH></p>
申请公布号 EP0700214(A2) 申请公布日期 1996.03.06
申请号 EP19950113192 申请日期 1995.08.22
申请人 HUGHES AIRCRAFT COMPANY 发明人 MEAD, DONALD C.
分类号 H04N7/32;G06T9/00;H03M7/36;H04N7/26;H04N7/36;H04N7/50;H04N9/804;(IPC1-7):H04N7/26 主分类号 H04N7/32
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