ridm@nrct.go.th   ระบบคลังข้อมูลงานวิจัยไทย   รายการโปรดที่คุณเลือกไว้

Computationally efficient and adaptive scalable video coding.

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Computationally efficient and adaptive scalable video coding.
นักวิจัย : Li, He.
คำค้น : DRNTU::Engineering::Electrical and electronic engineering::Computer hardware, software and systems.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Li, H. (2012). Computationally efficient and adaptive scalable video coding. Doctoral thesis, Nanyang Technological University, Singapore. , http://hdl.handle.net/10356/50647
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : -
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Current digital video applications require delivery of digital video content to different clients over heterogeneous networks. These clients may have different system resources and bandwidth capabilities. Thus, delivering of digital video data compressed at specific spatial resolution, quality levels, frame rates and encoding those video data at specific bit rates according to the client resources and the available network is essential. The characteristics of current video transmission system pose many problems for video delivery and scalable video coding is a highly attractive solution. This thesis investigates the existing video coding standards, especially the newest H.264/advanced video coding and its scalable extension: scalable video coding. In this thesis, we address two issues related to the state-of-the-art scalable video coding: 1) computational complexity reduction; and 2) video coding efficiency enhancement. In the first part of this thesis, we address the complexity issue of spatial, signal-to-noise ratio (SNR), temporal and combined scalable video coding. Our goal is to find a good tradeoff between computational complexity and video coding efficiency. We first establish the need to reduce computational complexity for current H.264/advanced video coding and scalable video coding framework. We then evaluate the mode distribution correlations between the base layer and its enhancement layers for different video scalabilities. After the exhaustive search over all possible block partitions is performed at the base layer, the number of candidate modes for luma and chroma blocks in a macroblock that take part in rate distortion optimization calculation at enhancement layers could be greatly reduced based on the correlations. Finally, adaptive fast mode decision schemes for spatial, SNR and temporal scalable video coding are presented. Our schemes could achieve consistent and significant computational complexity reduction with negligible loss in objective and subjective video quality and insignificant increments in bit rate consumption. The second part of this thesis is to provide a solution for the problem of high computational complexity of scalable video decoders. An adaptive encoding algorithm is proposed to reduce decoder complexity in coarse grain SNR scalable video coding.

บรรณานุกรม :
Li, He. . (2555). Computationally efficient and adaptive scalable video coding..
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, He. . 2555. "Computationally efficient and adaptive scalable video coding.".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, He. . "Computationally efficient and adaptive scalable video coding.."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Li, He. . Computationally efficient and adaptive scalable video coding.. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.