Frost&Sullivan《201904中国视频通信行业白皮书》.pdf

中国视频通信行业白皮书

ZhongTuDaoQiJi_中途岛奇迹.pdf

中途岛

Weighted Finite-State Transducers Important Algorithms

Weighted Finite-State Transducers Important Algorithms University of Tokyo

vesely_interspeech2013_IS131333.pdf

Sequence-discriminative training of deep neural networks

H.264/SVC Performance and Encoder Bit- stream Analysis

With the introduction of diverse variety of display transmission and resolutions channel capacities, the Joint Video Team (JVT) has developed the H.264/SVC as an extension of H.264/AVC. In fact, it provides a single compressed bit-stream with several scalability levels. Such a dataflow needs to be analyzed. Consequently, this paper is the first that decorticates and investigates the H264/SVC bit-stream in order to highlight its contribution from one hand and to analyze deeply the different sub bit-stream modules in terms of size and importance on the other hand. Results of a first analysis shows that multicast coding using H264/SVC standard provides an average bit rate reduction of 18% compared to simulcast. Second analysis demonstrates the importance of inter layer prediction. Then a third study illustrates two best combinations for two network bandwidth limitation. Finally, analysis of different subfields that constitute H264/SVC bit stream shows the importance of the residual module which can form up to 72% of the total data output. Results also illustrate the significance of the inter-layer prediction. In fact, base layer information takes the lion’s share of bit consumption mainly for B frame.

A Technical Overview of VP9--the Latest Open-Source Video Codec

A Technical Overview of VP9--the Latest Open-Source Video Codec Google has recently finalized a next generation open-source video codec called VP9, as part of the libvpx repository of the WebM project (http://www.webmproject.org/). Starting from the VP8 video codec released by Google in 2010 as the baseline, various enhancements and new tools were added, resulting in the next-generation bit-stream VP9. The bit-stream was finalized with the exception of essential bug-fixes, in June 2013. Prior to the release however, all technical developments in fact were being conducted openly in the public experimental branch of the repository for many months. This paper provides a brief technical overview of the coding tools included in VP9, along with coding performance comparisons with other state-of-the-art video codecs - namely H.264/AVC and HEVC - on standard test sets. While a completely fair comparison is impossible to conduct because of the limitations of the respective encoder implementations, the tests show VP9 to be quite competitive with main-stream state-of-the-art codecs.