Audio signal reproducing apparatus

Details Audio signal reproducing apparatus Audio signal reproducing apparatus

1990-10-22

1997-06-17

Isen, Forester W.

Electrical audio signal processing systems and devices

Headphone circuits

381 2, 381183, 381187, 395 238, H04R 110

Patent

active

056404581

ABSTRACT:
A small-sized audio signal reproducing apparatus for hearing reproduced audio signals with the aid of a headphone is disclosed. Digitized and compression encoded audio signals, stored in a semiconductor memory, are read out so as to undergo a decoding operation, which is an inverse operation to compression encoding, to reproduce the audio signals, and the reproduced signals are heard by the headphone. The apparatus may be significantly reduced in size and weight, as compared to the apparatus in which a tape or a disk is used as the recording medium.

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Johnston, "Transform Coding of Audio Signals using Perceptual Noise Criteria," IEEE 1988.

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