Encoding device and method and multimedia apparatus including the encoding device
US8948242B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2010 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Apr 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/177
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoding device and method of using a bit rate control method which accurately predicts a target bit amount, provides excellent quality, and is applicable to a real-time environment through a simple mechanism, and a multimedia apparatus including the encoding device. The encoding device includes a group-of-pictures (GOP)-based bit assigning unit for assigning a GOP-based bit amount targetGOP, a macroblock-based bit assigning unit for assigning a macroblock-based bit amount for all macroblocks included in the GOP, a quantizing device for checking a current buffer state, determining a quantization parameter (QP) by using an alternating current (AC) coefficient obtained by transforming a macroblock if a buffer occupancy rate is lower than a predetermined limit rate, and performing quantization by using the determined QP, and a variable length coding (VLC) unit for performing VLC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.