Method and apparatus for encoding digital signal, method and apparatus for decoding digital signal, and recording medium for encoded signals
US5712955A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1995 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Mar 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/0212
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An encoding apparatus for encoding a digital signal and a decoding apparatus for decoding the encoded signal. This encoding apparatus comprises a time series sample buffer for dividing an input signal into blocks, an orthogonal transform encoding section for transforming the signals every blocks into spectrum signals, and an entropy encoding section for implementing variable length encoding to all or a portion of the spectrum signals every blocks. At the entropy encoding section, there are provided an upper limit setting circuit for setting upper limit in the number of bits per each block of a signal encoded and outputted, and a bit number judging circuit for stopping outputting of a portion of spectrum signals in a block or blocks where the number of bits above the upper limit is required. The number of bits per each block is caused to have upper limit to stop recording or transmission of a portion of spectrum signals in a block or blocks where the number of bits above the upper limit is required. Thus, quantity of information caused to undergo encoding, recording or transmission and decoding can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.