Signal processing device for processing sound quality, and recor

Details Signal processing device for processing sound quality, and recor Signal processing device for processing sound quality, and recor

1997-04-23

1999-08-31

Loomis, Paul

Electrical audio signal processing systems and devices

Including frequency control

Having automatic equalizer circuit

381111, 381119, H03G 500, H04B 100

Patent

active

059464020

ABSTRACT:
In controlling a sound quality of a one-bit digital signal, a signal processing device takes the operating steps of separating the digital signal into two bands, an audible band and a higher band than the audible band, performing a sound quality of the audible band only, and adding the processed band to the other higher band than the audible band. This operation makes it possible for the signal processing device to control the sound quality as keeping the high dynamic range and wide band that are proper to a one-bit digital signal. The signal processing device may apply to a reproducing apparatus and a recording apparatus.

REFERENCES:
patent: 5347587 (1994-09-01), Takahashi et al.
patent: 5418859 (1995-05-01), Cho
patent: 5493699 (1996-02-01), Shioda et al.
patent: 5592403 (1997-01-01), Trager et al.
patent: 5592559 (1997-01-01), Takahashi et al.
patent: 5774567 (1998-06-01), Heyl
patent: 5825899 (1998-10-01), Yamaguchi et al.

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