Audio signal reproducing apparatus

Details Audio signal reproducing apparatus Audio signal reproducing apparatus

2005-12-13

2005-12-13

Mei, Xu (Department: 2644)

Electrical audio signal processing systems and devices

Headphone circuits

C381S309000, C381S384000

Reexamination Certificate

active

06975732

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.

REFERENCES:
patent: 4412106 (1983-10-01), Pavel
patent: 4455649 (1984-06-01), Esteban et al.
patent: 4674124 (1987-06-01), Horrall et al.
patent: 4682363 (1987-07-01), Goldfarb et al.
patent: 4703465 (1987-10-01), Parker
patent: 4820233 (1989-04-01), Weiner
patent: 4934079 (1990-06-01), Hoshi
patent: 4963995 (1990-10-01), Lang
patent: 5040217 (1991-08-01), Brandenburg et al.
patent: 5056145 (1991-10-01), Yamamoto et al.
patent: 5111530 (1992-05-01), Kutaragi et al.
patent: 5225618 (1993-07-01), Wadhams
patent: 5438643 (1995-08-01), Akagiri et al.
patent: 5548574 (1996-08-01), Shimoyoshi et al.
patent: 5563913 (1996-10-01), Akagiri et al.
patent: 5640458 (1997-06-01), Nishiguchi et al.
patent: 5757938 (1998-05-01), Akagiri et al.
patent: 5774842 (1998-06-01), Nishio et al.
patent: 5787399 (1998-07-01), Lee et al.
patent: 5930758 (1999-07-01), Nishiguchi et al.
patent: 6141424 (2000-10-01), Takiguchi et al.
patent: 6445800 (2002-09-01), Nishiguchi et al.
patent: 6466677 (2002-10-01), Bush
patent: 6471131 (2002-10-01), Okada et al.
patent: 6695477 (2004-02-01), Nishiguchi et al.
patent: 6711270 (2004-03-01), Masuda
patent: 6728585 (2004-04-01), Neoh
U.S. Appl. No. 2002/003889, filed Jan. 2002, Fischer, .
David Weekly; “Very Solid Audio,” The Weekly Report, pp. 1-2.
James D. Johnston, “Tranform Coding of Audio Signals Using Perceptual Noise Criteria,” IEEE Journal on Selected Areas of Communication, vol. 6, No. 2, Feb. 1988.

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