Design of a New Shaped Variable Bit Rate Algorithm for Video Applications

Abstract

The aim of this paper is to present a new shaped Variable Bit Rate (VBR) for video transmission, which plays a crucial role in delivering video traffic over the Internet. This new shaped algorithm, referred to as Slight Delay Shaped Variable Bit Rate (SD-SVBR). It is designed based on the Shaped VBR (SVBR) algorithm that is devised for real-time video application. This algorithm has been utilized by many researchers in many network conditions. However, SVBR inherits several limitations and weaknesses due to its embedded estimation or prediction processes. SVBR suffers from several problems, such as the occurrence of unwanted sharp decrease in video rate, bucket overflow, the existence of a low video rate, and the generation of a cyclical negative fluctuation. The new algorithm is capable of producing a high video rate and at the same time a better Quantization Parameter (QP) stability video sequence. Besides that, the video rate is shaped efficiently to prevent unwanted sharp increment or decrement, and to avoid bucket overflow. The experiments showed that SD-SVBR gains an impressive result. In almost all cases, it gains high video rate without bucket overflow, utilizes the bucket well, and interestingly, it is still able to obtain smoother QP fluctuation.