The paper presents a prototype of virtual decoder of the transport stream＇s system target decoder （T-STD）. By connecting the coding model and decoding model, and feeding the overflow of decoding buffer back to cont...The paper presents a prototype of virtual decoder of the transport stream＇s system target decoder （T-STD）. By connecting the coding model and decoding model, and feeding the overflow of decoding buffer back to control coding, we have got a self-adaptive coding model, and propose an algorithm of muhiplexing multiple elementary streams to a transport stream based on the principle of virtual buffer controlling strategy. The transport stream （TS） which uses this method passes the test of software unzipping and set top-box （STB） playing, and all of the analyzing parameters which are detected by code analyzer accord with the standard of MPEG-2. Some problems that playing time becomes longer and mul tiple TS streaming can not be fit for all the players are also analyzed.展开更多
Rain has a strong attenuation effect on light,which can impact the performance of visible light communication(VLC).In this paper,we addressed the crucial challenge of implementing high-speed VLC systems in rainy envir...Rain has a strong attenuation effect on light,which can impact the performance of visible light communication(VLC).In this paper,we addressed the crucial challenge of implementing high-speed VLC systems in rainy environments by focusing on the performance of different wavelengths under varying rain conditions.By analyzing the attenuation characteristics of four laser diodes at different wavelengths under various artificial rain environments,we developed a high-speed VLC system optimized for rainy channel high-speed visible light communication by employing the orthogonal frequency-division multiplexing modulation scheme.By integrating channel-adaptive pre-equalization and bit-loading algorithms,our system optimized signal transmission in rainy channels,enabling an aggregated data rate exceeding 30 Gbps,which was the highest reported data rate for VLC in rainy channels,to the best of our knowledge.展开更多
基金Supported by the Electronics Developing FundProject ( MII[2002]13)
文摘The paper presents a prototype of virtual decoder of the transport stream＇s system target decoder （T-STD）. By connecting the coding model and decoding model, and feeding the overflow of decoding buffer back to control coding, we have got a self-adaptive coding model, and propose an algorithm of muhiplexing multiple elementary streams to a transport stream based on the principle of virtual buffer controlling strategy. The transport stream （TS） which uses this method passes the test of software unzipping and set top-box （STB） playing, and all of the analyzing parameters which are detected by code analyzer accord with the standard of MPEG-2. Some problems that playing time becomes longer and mul tiple TS streaming can not be fit for all the players are also analyzed.
基金supported by the National Key Research and Development Program of China(No.2021YFB3601003)。
文摘Rain has a strong attenuation effect on light,which can impact the performance of visible light communication(VLC).In this paper,we addressed the crucial challenge of implementing high-speed VLC systems in rainy environments by focusing on the performance of different wavelengths under varying rain conditions.By analyzing the attenuation characteristics of four laser diodes at different wavelengths under various artificial rain environments,we developed a high-speed VLC system optimized for rainy channel high-speed visible light communication by employing the orthogonal frequency-division multiplexing modulation scheme.By integrating channel-adaptive pre-equalization and bit-loading algorithms,our system optimized signal transmission in rainy channels,enabling an aggregated data rate exceeding 30 Gbps,which was the highest reported data rate for VLC in rainy channels,to the best of our knowledge.
