Television – Bandwidth reduction system – Data rate reduction
Patent
1998-01-14
1999-11-02
Tung, Bryan
Television
Bandwidth reduction system
Data rate reduction
348419, H04N 712
Patent
active
059780339
ABSTRACT:
A motion picture encoder employs a motion compensation predictive encoding method to provide video signals. The motion picture encoder uses a relatively small storage capacity for a frame memory. Specifically, the frame memory has a storage capacity for storing at least two original pictures and one local decoding picture. A noise reducer unit performs a noise reducing process with respect to a present picture signal and a preceding picture signal. For example, a difference value is calculated between the present picture signal and preceding picture signal and is multiplied by a prescribed coefficient, whereupon a result of the multiplication is added to the preceding picture signal. In addition, a motion estimation/compensation unit is provided to perform motion estimation and motion compensation with respect to an encoding picture and a reference picture. A memory control unit is provided to control a data transfer between the noise reducer unit, frame memory and motion estimation/compensation unit. Specifically, the memory control unit controls the frame memory to allow an input of the present picture from the noise reducer unit, an output of the preceding picture to the noise reducer unit, outputs of the encoding picture and reference picture to the motion estimation/compensation unit and an input of the local decoding picture from the motion estimation/compensation unit. An interface between the frame memory and memory control unit has the capacity for a data transfer rate which is five or more times faster than an input rate of video signals.
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NEC Corporation
Philippe Gims S.
Tung Bryan
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