Variable-length decoding apparatus
US5604499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1994 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Dec 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/425
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.