| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an arithmetic encoding and decoding device which is inexpensively manufactured without enlarging a buffer amount. <P>SOLUTION: The device comprises: a symbol predicting part (12) for predicting that symbol data being decoded takes a value for increasing processing man-hours in subsequent processing procedures to be determined by the value of the symbol data; a context generating part (4) for reading a context, based on the decoding symbol data or the prediction symbol data; an arithmetic part (7) for inputting the context and decoding encoding data; a comparing part (13) for comparing the decoding symbol data with the prediction symbol data; and a control part (10) for performing control to conduct decoding with the use of the context which is read based on the prediction symbol data when the comparison result is coincidence and to conduct decoding after performing context reading processing again based on the decoding symbol data when the result is not coincidence. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
