Optimized Rate-Distortion Extraction with Quality Layers

Overview of the Scalable Video Coding Extension of the H.264/AVC Standard

“…Section VI) provides different means for including such priority information in a bit stream. For more detailed information about the concept of optimized bit stream extraction, which is also referred to as priority layers, the reader is referred to [46].…”

Optimal Joint Source-Channel Coding using Unequal Error Protection for the Scalable Extension of H.264/MPEG-4 AVC

“…We also define a number of protection levels d and impose UEP by forcing the source rate in the l M packets to be non-decreasing. As in [6] it is assumed that the total expected distortion can be expressed as a sum of the individual frame distortions. In this context, the problem is to find, for every encoded frame l , the optimum source and channel rates, …”

Performance Analysis of SVC

“…It was, however, shown that the MGS concept is capable of providing very similar rate-distortion results at a significantly reduced complexity, especially for large GOP sizes [10], [16]. In Fig.…”

“…The rate-distortion efficiency of extracted bit streams can be improved when the impact of discarding a NAL unit on the rate-distortion efficiency of the remaining bit stream is taken into account. An approach for optimized bit stream extraction using priority information similar to the quality layers in JPEG-2000 [23] is presented in [24]. In SVC, quality layers can be indicated either by making use of the NAL unit header syntax element priority id or by indication via a separate supplemental enhancement information (SEI) message.…”

“…The rate-distortion efficiency of the bit streams that are obtained with the priority-based extraction is determined by the algorithm that is used for assigning the priority identifiers to the NAL units of an SVC bit stream. Several algorithms for determining priority values that provide a good rate-distortion efficiency for all extractable bit rates have been proposed [24]- [26].…”