Encoder and decoder

Details Encoder and decoder Encoder and decoder

2006-03-21

2006-03-21

Chin, Vivian (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Quadrasonic

C341S050000, C704S500000

Reexamination Certificate

active

07016502

ABSTRACT:
The present invention relates to an encoding device for saving the number of bits of codes. In step S11, the differential value between a normalization coefficient Bito be encoded and a normalization coefficient Bi-1for an encoding unit Ai-1in a band adjacent to the lower side of an encoding unit Aicorresponding to the normalization coefficient Biis computed. In step S12, reference is made to a table in which a differential value having a high frequency of occurrence is associated with a code having a small number of bits, and a code corresponding to the computed differential value is read. In step S13, it is determined whether or not all normalization coefficients B have been encoded. If it is determined that all normalization coefficients B have been encoded, in step S14, the code read in step S12is output. The present invention is applicable to an audio recorder.

REFERENCES:
patent: 5731767 (1998-03-01), Tsutsui et al.
patent: 5901234 (1999-05-01), Sonohara et al.
patent: 5974379 (1999-10-01), Hatanaka et al.
patent: 4-504192 (1992-07-01), None
patent: 8-54899 (1996-02-01), None
patent: 8-181617 (1996-07-01), None
patent: WO 90/09022 (1990-08-01), None

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