AUDIO SIGNAL REPRODUCING BAND LIMITING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an audio signal reproducing band limiting device that can reproduce high-quality audio signals while its circuit scale and the number of used parts are reduced. SOLUTION: This audio signal reproducing band limiting device is provided with an encoding/decoding circuit 16 for transmission and reception, an amplifier 17 which amplifies audio signals decoded in the circuit 16, and a capacitor 9 for by-pass filter which cuts off the low-band frequency component in the frequency band of 0-200 Hz of the audio signals. This device is also provided with a loudspeaker 18 which reproduces the audio signals. The encoding/decoding circuit 16 contains a band limiting digital filter having a single frequency characteristic and limits the frequency band of audio signals inputted and received by means of the digital filter. COPYRIGHT: (C)2004,JPO