Variable-length decoding apparatus

Details Variable-length decoding apparatus Variable-length decoding apparatus

1994-12-14

1997-02-18

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

H03M 740

Patent

active

056044992

ABSTRACT:
A prefix data generating portion is arranged such that a bit string having bits in predetermined number supplied from a barrel shifter is compared, from the head part thereof, with predetermined patterns and that there is supplied a less-bit bank address assigned to the identical predetermined pattern. In a look-up table, a decoded data is addressed using (i) an upper address of the bank address and (ii) a lower address of a plurality of remaining bits of the code, other than the predetermined pattern. Accordingly, the look-up table can be addressed with an address in which the number of bits is smaller than that of the code. This reduces the look-up table in capacity, enabling to provide a variable-length decoding apparatus reduced in hardware size.

REFERENCES:
patent: 4899149 (1990-02-01), Kahan
patent: 5404138 (1995-04-01), Kim et al.

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