ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
35.10
Showing 1-16 articles out of 16 articles from the selected issue
  • Type: Cover
    Pages Cover1-
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (12K)
  • Type: Index
    Pages Toc1-
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (42K)
  • Kenji SUGIYAMA
    Type: Article
    Session ID: BCT2011-30
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Currently, the widely used video formats are 4:2:0 or 4:2:2, however, the picture quality is degraded; in particular with interlaced 4:2:0, the degradation of the luminance signal is significant with high saturation color. On the other hand, inter-picture processing with accurate motion compensation has been realized. This technique reduces the importance that the format contain all color components in a frame. On this basis, I have proposed the new video format called the sequential color system, in which three color planes appear sequentially. Sequential color retains the picture quality of 4:4:4, as long as the racked color is carefully interpolated. When it is used for a camera, the same resolution as three sensor system can be achieved with small optical loss and blur. For coding, this format has a half size of 4:2:2 for uncompressed data. For compression, only one plane exists to code in a frame, and, very high efficiency will be expected.
    Download PDF (851K)
  • Toshio Hasegawa, Naoya Sagara, Kenji Sugiyama
    Type: Article
    Session ID: BCT2011-31
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We have proposed a sequential color system for use as a video format. In this system, three color planes are used sequentially, and, it has a picture quality of 4:4:4 with half uncompressed data of 4:2:2, if suitable color interpolation is used. To realize this system, a conversion to whole RGB picture with the interpolation of missing color plane is important. For this, a motion compensated interpolation by the same color plane in the other frames is effective. However, the conventional methods of motion estimation and compensation are not useful directly because of the changing of color plane by a frame. We discuss the adaptive interpolation method using forward frame and backward frame. Further, a motion estimation method using the contour picture and the same color plane are proposed. Finally, it is shown that useful converted picture is given for the usual picture.
    Download PDF (623K)
  • Kazuhiro Hasegawa, Naoya Sagara, Kenji Sugiyama
    Type: Article
    Session ID: BCT2011-32
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We have proposed a sequential color system for use as a video format. In this system, three color planes are used sequentially, and, it has a picture quality of 4:4:4 with half uncompressed data of 4:2:2, if suitable color interpolation is used. To realize this system, a conversion to whole RGB picture with the interpolation of missing color plane is important. For this, we use a motion compensated interpolation by the same color plane in the other frames, however, it does not work in very fast motion. Therefore, we should consider a color plane prediction method without motion compensation. In the case of one color lack, a value of lacked plane is predicted by existing planes using a color probability of reference picture. In the case of two colors lack, a clustering of color planes is used. Each cluster is predicted by the similarity of the cluster between target and reference frames.
    Download PDF (709K)
  • Kazuki Suzuki, Takahiro Toguchi, Takayuki Kakuta, Kenji Sugiyama
    Type: Article
    Session ID: BCT2011-33
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We have proposed a sequential color system for use as a video format. In this system, three color planes are used sequentially, and, it has a picture quality of 4:4:4 with half uncompressed data of 4:2:2, if suitable color interpolation is used. To realize this system, a high efficiency coding method is important. Before discussing the SC coding, R, G, B direct coding is compared to the coding for luminance and chrominance (Y, Cb, Cr) on view points of a coding efficiency and subjective picture quality. On the other hand, it seems that the optimizing for the perceptual quality is not easy in the direct coding. We discuss a quantization balance of R, G, B for the best subjective quality. Further, we propose the subjective quality improvement method by enhancing the PSNR of luminance component using quantization error diffusion between the color planes.
    Download PDF (542K)
  • Shusuke MURAISHI, Kazuhisa TSURUTA, Kenji SAKURAI, Herman Hideyuki UCH ...
    Type: Article
    Session ID: BCT2011-34
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    On July 24. 2011, the analog television broadcasting will perfectly change to digital television broadcasting in UHF. With this, the technology of mobile digital television broadcasting receiver have developed remarkably. It is desired that the improvement of the deterioration of received signal quality due to the fading phenomenon resulting from the standing wave in mobile communication. Authors have used a single-feed planar antenna which is composed of the broadband planar monopole antenna (B-PMA) and the broadband planar slot antenna (B-PSA), and measured its received signal on the frequency range in UHF. In this paper, the field experiment results of suppressing the fading phenomenon resulting from the standing wave in UHF are described.
    Download PDF (444K)
  • Keisuke TSUBOI, Kentarou KANAI, Yoichi MATSUDA, Herman Hideyuki UCHIDA ...
    Type: Article
    Session ID: BCT2011-35
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Terrestrial DTV broadcasting has started in Japan since December, 2006. It is desired that the antennas have to have high performance and functional characteristics with small and light size. On the other hand, there are many applications in a single feed planar antenna with broad bandwidth. Therefore, the broadbanding and the miniaturization of the single-feed planar antennas for terrestrial DTV are proposed and analyzed by FDTD method. The results are described and discussed in this report.
    Download PDF (423K)
  • Yoichi Matsuda, Yuma Koike, Keisuke Goto, Taiki Matsui, Toshio Wakabay ...
    Type: Article
    Session ID: BCT2011-36
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    With development of the information and communication technology, a UWB (Ultra Wide Band) communication system attracts attention as high speed and a large-capacity radio system. The interference between the UWB system and the wireless LAN in the 5GHz band assigned for IEEE802.11a is feared. Therefore, a single feed planar UWB antenna with a parasitic element was proposed in order to make a stop band in the 5GHz band and has been analyzed by using the FDTD method. Characteristics of the single-feed planar UWB antennas with the parasitic element which make the stop band are discussed for its shape in the report.
    Download PDF (522K)
  • Yuta NAKAGAWA, Koichi SAKAGUCHI
    Type: Article
    Session ID: BCT2011-37
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    In recent years, the UWB technology in which high speed and short distance communication are possible is studied briskly. As a demand to a UWB antenna, it has a wide band characteristic, and is a small size, and there is almost no frequency dependency in a radiation pattern. In this paper, the small box type antenna for UWB with simple structure is proposed. The antenna has 10mm antenna height, and frequency bandwidth is from 3.1 to 11.5GHz. Furthermore, it has an omnidirectional radiation pattern on a horizontal plane with almost no frequency dependency. The basic properties of the antenna, the relation between frequency bandwidth and an element size, and the installation to an electronic substrate are explained.
    Download PDF (570K)
  • Shinichi SUZUKI, Takayuki NAKAGAWA, Tetsuomi IKEDA
    Type: Article
    Session ID: BCT2011-38
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We have developed a wireless Hi-Vision TV (HDTV) camera, called the "Millimeter-wave Mobile Camera", which can transmit HDTV pictures with high-capacity and low delay. For this development, a realization of bi-directional transmission between HDTV camera and control room is essential, so we have developed a return link system for the wireless camera using millimeter-wave band and transmitter diversity techniques with the aim of high link reliability. This paper describes the feature of the 42GHz-band return transmission system, which can transmit HDTV pictures with low delay and realize HDTV camera remote control, Generator lock synchronization and wireless communication, and an operational example of the wireless camera including return transmission system in "61st NHK Red and White Year-End Song Festival".
    Download PDF (623K)
  • Takayuki NAKAGAWA, Shinichi SUZUKI, Tetsuomi IKEDA
    Type: Article
    Session ID: BCT2011-39
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The authors have been developing a "Millimeter-wave Mobile Camera", a wireless high definition TV camera which uses millimeter-wave band. In the past, they proposed 1x4 SIMO-OFDM and 2x4 MIMO-OFDM as modulation schemes for the main link, and developed transmitters and receivers to achieve them. After that, to enable return link transmission in the millimeter-wave band, they proposed 4x1 MISO-OFDM as a modulation scheme for the return link, and developed 42GHz band transceivers to achieve bi-directional MIMO transmission. Additionally, to make the setup easy by using optical trunk cables, they developed optical transmission equipment for the transmission of the IF signals between base-stations and main link demodulator/return link modulator at the video control room.
    Download PDF (654K)
  • Shingo ASAKURA, Kenichi MURAYAMA, Makoto TAGUCHI, Takuya SHITOMI, Kazu ...
    Type: Article
    Session ID: BCT2011-40
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    NHK is conducting research on the next generation of digital terrestrial broadcasting to enable large-volume content services such as Super Hi-Vision. We are studying on the large capacity transmission technologies using dual polarize MIMO and ultra multi-level OFDM. We have developed a prototype of MIMO-OFDM (4096QAM) modulator/demodulator that have large transmission capacity. We have conducted indoor and field experiment, and this paper describes the verification of transmission characteristics.
    Download PDF (669K)
  • Type: Appendix
    Pages App1-
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (83K)
  • Type: Appendix
    Pages App2-
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (83K)
  • Type: Appendix
    Pages App3-
    Published: February 18, 2011
    Released: September 21, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (83K)
feedback
Top