Optimization Methods for H.264/AVC Video Coding

Efficient Region-of-Interest Scalable Video Coding with Adaptive Bit-Rate Control

“…The need for the scalability actually arises from the need for various spatial formats (depending on the particular end-user devices), bit-rates, and power [2]. To fulfill these requirements, it would be beneficial to simultaneously transmit or store video in a variety of spatial/temporal resolutions and qualities, leading to the video bitstream scalability.…”

“…These functionalities lead to an enhancement of the video transmission and storage applications. The SVC standard has achieved significant improvements in coding efficiency with an increased degree of supported scalability relative to the scalable profiles of prior video coding standards, such as MPEG-2 [2].…”

“…The bit-rate control has been intensively studied in the recent video coding standards, such as MPEG-2, MPEG-4, and H.264/MPEG-4 AVC [2,35]. According to the existing single layer rate control schemes, the encoder employs the rate control as a way to control varying bit-rate characteristics of the coded bitstream.…”

“…In this context, high-definition, highly interactive networked media applications pose challenges to network operators. The variety of end-user devices with different capabilities, ranging from smartphones with relatively small displays and restricted processing power to high-end PCs with highdefinition displays, has stimulated a significant interest in effective technologies for providing video content in various spatial formats, employing limited computational complexity resources and operating under low bit-rates [2].…”

Live video streaming with adaptive pre-processing by using scalable video coding

“…Much of the attention in the field of video adaptation is currently directed to the Scalable Video Coding [1], which is an extension of the H.264/AVC standard [2]. A major requirement for the Scalable Video Coding is to enable encoding of a high-quality video bitstream that contains one or more subset bitstreams, each of which can be transmitted and decoded to provide video services with lower temporal/spatial resolutions, or reduced fidelity, while retaining the reconstruction quality that is highly relative to the rate of the subset bitstreams [1].…”