| 摘要 |
<p>PURPOSE: To improve the calculation rate by using a circuit utilizing a neural network with a parallel processing characteristic for a part necessitating a long period at the time of performing the discrete cosine transformation. CONSTITUTION: This circuit is provided with a multiplier 20 utilizing a neural network for multiplying the output of a cosine term processing part 10 and an input value from an external circuit, an adder 30 utilizing the neural network for summing the product value and a value latched by a first latching part 50, a subtracter 40 utilizing the neural network for subtracting a specified number of bits of the exponent part by a specified constant so as to divide the final output value by N/2 and a second latch part which is reset when an underflow is generated and latching the input signal from the subtracter 40 and the first latch part 50 according to a second clock signal to maintain an output value. Namely, this integrated circuit for discrete cosine transformation uses a general digital circuit, the basic circuit of a neural network conception, and the like, and at the time of processing the discrete cosine transformation, a part necessitating a long period is processed by means of a circuit utilizing a neural network with a parallel processing characteristic. Thereby the calculation rate is improved.</p> |
