ADAPTATION PREDICTIVE CODING DEVICE

更新时间:2023-05-05 13:30:40 阅读: 评论:0

专利名称:ADAPTATION PREDICTIVE CODING DEVICE 发明人:USUBUCHI TOORU
申请号:JP5976080
申请日:19800506
公开号:JPH0121667B2
公开日:
19890421
专利内容由知识产权出版社提供
摘要:PURPOSE:To reduce the number of pieces of out-of-prediction and to make a mode code showing a lection predictive value unnecessary, by lecting the predictive value to a sample value bad on the sample value of a picture element ud to produce plural numbers of predictive value and its nearby picture element. CONSTITUTION:The sample value X of a sampled and binary coded picture signal and applied to the terminal 1 is supplied to a line memory 2a, predictors 3a1- 3an and a predictive lection circuit 4 respectively. The predictor consists of a shift register and a ROM, and the predictive values P1-Pn are delivered through the predictors 3a1-3an and by means of a picture element and its nearby picture element. Then the circuit 4 delivers a signal to lect the predictive value Px by means of the sample value of the reference picture element ud to produce the values P1-Pn and a part of its nearby picture element. With this output a mutliplexer 5 lects the value Px. Then the prediction error signal Y is obtained from an exclusive OR of the values Px and X, and then delivered through a terminal 8 after a coding.
申请人:NIPPON ELECTRIC CO
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