Showing papers on "Smacker video published in 2023"
TL;DR: In this paper , two methods for increasing the efficiency of the MPEG Immersive Video (MIV) coding standard were described, which manipulate the MIV-formatted atlas videos by considering the coding principles of the widely used video encoder, enhancing the encoding efficiency for the immersive video content.
Abstract: This paper describes two methods for increasing the efficiency of the MPEG Immersive Video (MIV) coding standard. The methods manipulate the MIV-formatted atlas videos by considering the coding principles of the widely used video encoders, enhancing the encoding efficiency for the immersive video content. The first method, patch average color modification removes the constant component of all YCbCr components of each patch within atlases, resulting in the reduction of the number and magnitude of edges within a texture atlas video. The second proposed method changes the dynamic range of the geometry (depth) atlas, adapting to the quality of input depth maps. Both methods proposed by the authors of this paper were included into the Test Model for MPEG Immersive Video (TMIV), which is the reference implementation of the MIV codec. Moreover, the metadata syntax relating to the first proposed method was adopted to the ISO/IEC 23090-12 standard.
1 citations
TL;DR: In this paper , the authors comprehensively review the classic rate control (RC) technologies used in international video standards of past generations, analyze the mathematical models and implementation mechanisms of various schemes, and compare the performance of recent state-of-the-art RC algorithms.
Abstract: Video coding is a video compression technique that compresses the original video sequence to produce a smaller archive file or reduce the transmission bandwidth under constraints on the visual quality loss. Rate control (RC) plays a critical role in video coding. It can achieve stable stream output in practical applications, especially real-time video applications such as video conferencing or game live streaming. Most RC algorithms either directly or indirectly characterise the relationship between the bit rate (R) and quantisation (Q) and then allocate bits to every coding unit so as to guarantee the global bit rate and video quality level. This paper comprehensively reviews the classic RC technologies used in international video standards of past generations, analyses the mathematical models and implementation mechanisms of various schemes, and compares the performance of recent state-of-the-art RC algorithms. Finally, we discuss future directions and new application areas for RC methods. We hope that this review can help support the development, implementation, and application of RC for new video coding standards.
TL;DR: In this paper , a video pipelining architecture is proposed to enable the end users to extract videos in any format and resolution seamlessly, combined with the scalability, reliability, and cost-effectiveness of the cloud.
Abstract: One of the fundamental challenges faced in deploying multimedia systems is delivering smooth and uninterrupted audio-visual information anywhere and anytime. In such systems, multimedia content is compressed within a certain format, this requires format conversion for various devices. Thus, a transcoding mechanism is required to make the content adaptive for various devices in the network. Video transcoding converts one digitally encoded format into another, this involves translating any file format containing video and audio at the same time. This is an essential feature for devices that do not support a specific format of media or have limited storage that requires a reduced file size. Through this paper, we provide a novel way of transcoding the block-based video coding schemes using cloud architecture by establishing a video pipelining architecture. The solution discussed in this paper would enable the end users to extract videos in any format and resolution seamlessly, combined with the scalability, reliability, and cost-effectiveness of the cloud. The proposed idea would be lucrative for all the video streaming applications that are currently relying on their legacy infrastructure for video transcoding.
07 May 2023
TL;DR: The recently finalized Versatile Video Coding (VVC) standard was designed to be suitable for a broad range of video content types and services, specifically including 360° video as discussed by the authors .
Abstract: Immersive video, ranging from 360° video to volumetric three-dimensional video, is expected to gain importance in the future. The recently finalized Versatile Video Coding (VVC) standard was designed to be suitable for a broad range of video content types and services, specifically including 360° video. In the same spirit, the format to encapsulate VVC in the ISO Base Media File Format (ISOBMFF) was tailor-made to support storage and streaming of immersive video. This paper reviews the features of VVC and its ISOBMFF storage for immersive video carriage. Furthermore, VVC-based profiles of the Omnidirectional Media Format standard are described as examples of using VVC and its ISOBMFF storage for immersive video streaming.