Encoder capable of faithfully and adaptively encoding a moving image
Orthogonal transform coding apparatus for reducing the amount of coded signals to be processed and transmitted
Method and system for reproducing natural image
Medical image system with progressive resolution Patent #: 5416602
ApplicationNo. 233702 filed on 04/26/1994
US Classes:375/240.18, Transform358/403, Document filing and retrieval system358/439Receiver supplies auxiliary signal(s)
ExaminersPrimary: Britton, Howard W.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04N 007/30
Foreign Application Priority Data1993-04-26 JP
AbstractCompressed image data of a desired picture is read out from a memory having compressed image data of a sequential format stored therein and then subjected to an examination with respect to a plurality of frequency components of the read-out compressed image data. Part of the plurality of frequency components is deleted to obtain compressed image data of a quality lower than an original quality of the compressed image data. The obtained compressed image data of the lower quality is decoded and displayed on a display. The plurality of frequency components are deleted in a stepwise manner according to a traffic state of a transmission line through which the compressed image data is to be transmitted. For maintaining a picture frame rate to be constant, the plurality of frequency components may be deleted in a stepwise manner. For obtaining a desired decoding rate, the plurality of frequency components may be deleted in a stepwise manner.