SIGNAL SYNTHESIZING CIRCUIT, SIGNAL PROCESSING CIRCUIT PROVIDED WITH THE CIRCUIT, STEREO AUDIO REPRODUCTION DEVICE PROVIDED WITH THE SIGNAL PROCESSING CIRCUIT AND AUDIO-VISUAL REPRODUCTION DEVICE PROVIDED WITH THE STEREO-AUDIO REPRODUCTION DEVICE

摘要

PURPOSE: To reinforce a stereo image signal without the occurrence of amplitude transmission depending on a frequency when a monaural signal is reproduced. ;CONSTITUTION: A first signal route between a first input terminal 2 and an output terminal 4 has a first transmission characteristic H1*H3 and a second signal path between a second input terminal 3 and an output terminal 4 has a second transmission characteristic H2*H3. Amplitude transmission decided by the first transmission characteristic H1*H3 is made larger than amplitude transmission decided by the second transmission characteristic H2*H3 for the scheduled frequency. At the time of mutually connecting the first input terminal 2 and the second input terminal 3, amplitude transmission between the first and second input terminals 2 and 3, which are mutually connected, and the output of a subtraction circuit 8 is made almost constant as the function of the frequency.;COPYRIGHT: (C)1995,JPO