Mode Decision and Encoder Rate Control for Block-based Distributed Video Coding
碩士 === 國立中正大學 === 電機工程研究所 === 100 === Distributed video coding is a coding method with low complexity encoder.It separates sequence into intra mode and Wyner-Ziv mode. Most of the distributed video coding methods need the feedback channel to control the number of transmitted parity bits. However, th...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/55049209508593310447 |
| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 100 === Distributed video coding is a coding method with low complexity encoder.It separates sequence into intra mode and Wyner-Ziv mode. Most of the distributed video coding methods need the feedback channel to control the number of transmitted parity bits. However, the feedback channel is not suitable for some application.
This paper focuses on the mode decision and encoder rate control for block-based distributed video coding. We propose a mode decision method by using the rate-distortion cost and adjust the Lagrange multiplier. We also propose two method for rate estimation, and compared the experimental results with the case with feedback channel.
The experimental results show the new mode decision can increase the coding efficiency obviously. The rate control can increase the accuracy in high QP case and keep good video quality.
|
|---|