Coding apparatus, program and data processing method
US7132964B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2005 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Aug 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A coding apparatus, a program and a data processing method capable of attaining a high speed and a reduction of a computation amount in coding processing is provided, wherein coding portions for performing a left shift operation on a range and a lower limit value until the range exceeds a predetermined value and performing coding in accordance with the lower limit value before performing the left shift operation comprise a bit position specifying portion for specifying a bit position indicating a first logic value being closest to the MSB in a range; a shift amount specifying portion for specifying a shift amount immediately before the range exceeds a predetermined value by a left shift operation based on the bit position; a judging portion for judging whether there is a free space exceeding the shift amount in a predetermined bit length of extended region data added to the MSB side of the lower limit value, wherein bit data is carried from the lower limit value by the left shift operation; and an extended data coding portion for generating coding data of data stored in the extended region data by the left shift operation when there is not a free space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.