Method and apparatus for high speed data compression and decompression
US7269291B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2004 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Aug 28, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/42
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A subband processing apparatus useful for wavelet conversion and compression-decompression operations includes a plurality of memories and a plurality of analytic filter banks. The plurality of memories store an input signal in a way such that the input signal is divided into a plurality of regional signals to correspond to the plurality of memories. The plurality of analytic filter banks analyzes in parallel the regional signals. Each analytic filter bank is configured to be in a one-to-one relationship with one of the plurality of memories. In this apparatus, each of the plurality of memories stores a corresponding regional signal and at least one other signal copied from the leading and trailing portions of other stored regional signals. Reverse processing is provided to synthesize a signal from a plurality of analyzed subband signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.