The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Yoshifumi Shimodaira - One of the best experts on this subject based on the ideXlab platform.
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Optical fiber transmission of data packets multiplexed with digital audio and video signals
IEEE Transactions on Consumer Electronics, 1998Co-Authors: H. Asada, Hiroaki Ikeda, N.a. Rabou, Yoshifumi ShimodairaAbstract:Describes a system for transmitting data packets multiplexed with digital audio and NTSC TV signals using optical fibers. Up to 18 channels are allocated for data packets transmitted at a maximum speed of 1.764 Mbps. Digital audio signals are inserted into the Horizontal Sync period of the NTSC TV signal. In addition to data packet transmission, the digital NTSC TV signal transmission system is used to easily distribute many types of information classified into categories. The proposed system is characterized by: firstly, this system can give a satisfactory picture quality enough to operate it together with video equipment even though the quality of the reproduced pictures is lower than that of normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00/spl times/fsc with a quantizing level of 8 bits. Secondly, NTSC TV picture codes, audio codes, and data packets can satisfactorily be transmitted using inexpensive devices at a transmission rate of as low as 50 Mbps. Thirdly, this system is used for transmitting data packets and audio signal codes which are inserted in the Horizontal Sync period of the digital NTSC TV signal. Both data packets and audio signal codes can be distributed to the specific receivers specified by device address. A combination of edge-emitting LEDs (ELEDs) and optical fibers enable the transmission system to easily transmit a digital NTSC TV picture signal together with data packets and digital audio codes. A new approach of combining ELEDs and optical fibers to distribute CATV pictures and electronic information via the ISDN is also proposed.
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Optical Fiber igital Transmission of Multiplexed Video a Suitable for Multimedia Applications
1997Co-Authors: Hideyuki Aygda, Takashi Yamada, Abd Rabou, Hiroaki Ikeda, Yoshifumi Shimodaira, Hirofumi Yoshida, Nec ShizuokaAbstract:This paper describes a new digital NTSC TV and audio signal transmission system in which circuit configurations are simplified and made more inexpensive than MPEG 2 on the basis of the subjective evaluation of the picture quality. An NTSC TV signal and an audio signal can easily be transmitted to the receiver at the same time, since the transmission rate is kept unchanged due to the insertion of the digital audio signal into the Horizontal Sync pulse of the digital NTSC TV signal. The proposed system has three features. Firstly, the system could give satisfactory picture quality enough to operate the consumer-use visual appliances even though the quality of the reproduced pictures is lower than that of the normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00 X fsc with a quantizing level of 8 bits. Secondly, the sys- tem can satisfactorily transmit NTSC TV picture codes at a low transmission rate of 50 Mbps even if such an advanced compression technique as MPEG 2 has not been used. Thirdly, the system is used for transmission of the digital audio signals which are inserted into the Horizontal Sync pulse of the digital NTSC TV signal. A combination of edge-emitting LED's @LED's) and single-mode (SM) optical fibers enable the sys- tem to easily transmit a digital NTSC TV picture signal to- gether with digital audio signals over the distance of 10 km through the SM optical fibers.
Nec Shizuoka - One of the best experts on this subject based on the ideXlab platform.
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Optical Fiber igital Transmission of Multiplexed Video a Suitable for Multimedia Applications
1997Co-Authors: Hideyuki Aygda, Takashi Yamada, Abd Rabou, Hiroaki Ikeda, Yoshifumi Shimodaira, Hirofumi Yoshida, Nec ShizuokaAbstract:This paper describes a new digital NTSC TV and audio signal transmission system in which circuit configurations are simplified and made more inexpensive than MPEG 2 on the basis of the subjective evaluation of the picture quality. An NTSC TV signal and an audio signal can easily be transmitted to the receiver at the same time, since the transmission rate is kept unchanged due to the insertion of the digital audio signal into the Horizontal Sync pulse of the digital NTSC TV signal. The proposed system has three features. Firstly, the system could give satisfactory picture quality enough to operate the consumer-use visual appliances even though the quality of the reproduced pictures is lower than that of the normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00 X fsc with a quantizing level of 8 bits. Secondly, the sys- tem can satisfactorily transmit NTSC TV picture codes at a low transmission rate of 50 Mbps even if such an advanced compression technique as MPEG 2 has not been used. Thirdly, the system is used for transmission of the digital audio signals which are inserted into the Horizontal Sync pulse of the digital NTSC TV signal. A combination of edge-emitting LED's @LED's) and single-mode (SM) optical fibers enable the sys- tem to easily transmit a digital NTSC TV picture signal to- gether with digital audio signals over the distance of 10 km through the SM optical fibers.
Hiroaki Ikeda - One of the best experts on this subject based on the ideXlab platform.
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Optical fiber transmission of data packets multiplexed with digital audio and video signals
IEEE Transactions on Consumer Electronics, 1998Co-Authors: H. Asada, Hiroaki Ikeda, N.a. Rabou, Yoshifumi ShimodairaAbstract:Describes a system for transmitting data packets multiplexed with digital audio and NTSC TV signals using optical fibers. Up to 18 channels are allocated for data packets transmitted at a maximum speed of 1.764 Mbps. Digital audio signals are inserted into the Horizontal Sync period of the NTSC TV signal. In addition to data packet transmission, the digital NTSC TV signal transmission system is used to easily distribute many types of information classified into categories. The proposed system is characterized by: firstly, this system can give a satisfactory picture quality enough to operate it together with video equipment even though the quality of the reproduced pictures is lower than that of normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00/spl times/fsc with a quantizing level of 8 bits. Secondly, NTSC TV picture codes, audio codes, and data packets can satisfactorily be transmitted using inexpensive devices at a transmission rate of as low as 50 Mbps. Thirdly, this system is used for transmitting data packets and audio signal codes which are inserted in the Horizontal Sync period of the digital NTSC TV signal. Both data packets and audio signal codes can be distributed to the specific receivers specified by device address. A combination of edge-emitting LEDs (ELEDs) and optical fibers enable the transmission system to easily transmit a digital NTSC TV picture signal together with data packets and digital audio codes. A new approach of combining ELEDs and optical fibers to distribute CATV pictures and electronic information via the ISDN is also proposed.
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Optical Fiber igital Transmission of Multiplexed Video a Suitable for Multimedia Applications
1997Co-Authors: Hideyuki Aygda, Takashi Yamada, Abd Rabou, Hiroaki Ikeda, Yoshifumi Shimodaira, Hirofumi Yoshida, Nec ShizuokaAbstract:This paper describes a new digital NTSC TV and audio signal transmission system in which circuit configurations are simplified and made more inexpensive than MPEG 2 on the basis of the subjective evaluation of the picture quality. An NTSC TV signal and an audio signal can easily be transmitted to the receiver at the same time, since the transmission rate is kept unchanged due to the insertion of the digital audio signal into the Horizontal Sync pulse of the digital NTSC TV signal. The proposed system has three features. Firstly, the system could give satisfactory picture quality enough to operate the consumer-use visual appliances even though the quality of the reproduced pictures is lower than that of the normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00 X fsc with a quantizing level of 8 bits. Secondly, the sys- tem can satisfactorily transmit NTSC TV picture codes at a low transmission rate of 50 Mbps even if such an advanced compression technique as MPEG 2 has not been used. Thirdly, the system is used for transmission of the digital audio signals which are inserted into the Horizontal Sync pulse of the digital NTSC TV signal. A combination of edge-emitting LED's @LED's) and single-mode (SM) optical fibers enable the sys- tem to easily transmit a digital NTSC TV picture signal to- gether with digital audio signals over the distance of 10 km through the SM optical fibers.
Yogesh Simmhan - One of the best experts on this subject based on the ideXlab platform.
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Semantically Annotated Provenance in the Life Science Grid
2008Co-Authors: Beth Plale, Girish Subramanian, Carole Goble, Paolo Missier, Yogesh SimmhanAbstract:A raster center control circuit for a CRT-type display device that automatically determines a correct Horizontal center position of a raster, regardless of a Horizontal Sync frequency input from a video card. The raster center control circuit includes a Horizontal deflection circuit, electrically connected to a Horizontal deflection yoke, to supply the Horizontal deflection yoke with a parabolic wave signal used to determine a Horizontal center position of the raster. A memory device stores predetermined values for raster control according to Horizontal Sync signal frequencies. A microprocessor determines a frequency of a Horizontal Sync signal and generates a raster control signal by converting one of the predetermined values stored in the memory device into a raster control signal according to the predetermined frequency. An operational amplifier, connected to the Horizontal deflection circuit, controls the Horizontal center position of the raster by summing the raster control signal with the parabolic wave signal of the Horizontal deflection yoke. The operational amplifier is operated by an independent voltage source. A reference of the independent voltage source is applied to a non-inverting input of the operational amplifier, and is coincident with the parabolic wave signal of the Horizontal deflection yoke.
Hideyuki Aygda - One of the best experts on this subject based on the ideXlab platform.
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Optical Fiber igital Transmission of Multiplexed Video a Suitable for Multimedia Applications
1997Co-Authors: Hideyuki Aygda, Takashi Yamada, Abd Rabou, Hiroaki Ikeda, Yoshifumi Shimodaira, Hirofumi Yoshida, Nec ShizuokaAbstract:This paper describes a new digital NTSC TV and audio signal transmission system in which circuit configurations are simplified and made more inexpensive than MPEG 2 on the basis of the subjective evaluation of the picture quality. An NTSC TV signal and an audio signal can easily be transmitted to the receiver at the same time, since the transmission rate is kept unchanged due to the insertion of the digital audio signal into the Horizontal Sync pulse of the digital NTSC TV signal. The proposed system has three features. Firstly, the system could give satisfactory picture quality enough to operate the consumer-use visual appliances even though the quality of the reproduced pictures is lower than that of the normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00 X fsc with a quantizing level of 8 bits. Secondly, the sys- tem can satisfactorily transmit NTSC TV picture codes at a low transmission rate of 50 Mbps even if such an advanced compression technique as MPEG 2 has not been used. Thirdly, the system is used for transmission of the digital audio signals which are inserted into the Horizontal Sync pulse of the digital NTSC TV signal. A combination of edge-emitting LED's @LED's) and single-mode (SM) optical fibers enable the sys- tem to easily transmit a digital NTSC TV picture signal to- gether with digital audio signals over the distance of 10 km through the SM optical fibers.