Coding/decoding apparatus and method
US5519394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The coder generates code information A.sub.1 -A.sub.N, each representing one of Q quantization points of an input signal, where Q is an integer equal to or less than 2.sup.x and X is a positive number, synthesizes the code information A.sub.1 -A.sub.N into a code H through an operation: EQU H=A.sub.1 Q.sup.N-1 +A.sub.2 Q.sup.N-2 + . . . +A.sub.N-1 Q+A.sub.N, and outputs the code H. The decoder inputs the code H, separates the code H into code information A.sub.1 -A.sub.N through operations with decimal fractions of quotients truncated: EQU A.sub.1 =H/Q.sup.N-1 EQU A.sub.2 =(H-A.sub.1 Q.sup.N-1)/Q.sup.N-2 EQU A.sub.N-1 =(H-A.sub.1 Q.sup.N-1 -A.sub.2 Q.sup.N-2 - . . . -A.sub.N-2 Q.sup.2)/Q EQU A.sub.N =H-A.sub.1 Q.sup.N-1 -A.sub.2 Q.sup.N-2 - . . . -A.sub.N-2 Q.sup.2 -A.sub.N-1 Q, and reproduces an output signal based upon the thus-separated code information A.sub.1 -A.sub.N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.