| 摘要 |
<p>PURPOSE:To reduce the cost by providing a subtractor, an adder, a prediction device receiving the result of addition as a feedback input and calculating a predicted value with respect to a succeeding current sample and an output terminal through which the result of addition is outputted. CONSTITUTION:A subtractor 5 takes a difference between a current sample value given via an input terminal 1 and a predicted value calculated by a prediction device 7, and an adder 6 adds a difference sample given via an input terminal 3 and a predicted value calculated by the prediction device 7. The result of subtraction by the subtractor 5 is sent from an output terminal 2 and the result of addition at the adder 6 is given to the prediction device 7 as a feedback input and sent to an output terminal 4. The prediction device 7 based on the given feedback input calculates the prediction value with respect to a succeeding current sample value given via the input terminal 1 and gives the predicted value to the subtractor 5 and the adder 6. Thus, it is possible to build up a prediction decoding circuit by using part of the function and the cost is reduced.</p> |
