Oki Electric Succeeds in Satellite Transmission with Its Portable Video Compression Transmitter, MPEG-4 Encoder RS-M; Proves Practical Use Viable in Marine Vessels and Mountain Areas.TOKYO -- Oki Electric Industry Co., Ltd. (TOKYO:6703) today announced it has succeeded in transmitting video through satellite phone connections with its portable video compression Encoding digital video to take up less storage space and transmission bandwidth. See video codec and data compression. video compression - Compression of sequences of images. transmitter, MPEG-4 Encoder RS-M. This experiment proved that a compact, light weighted encoder can transmit Internet Protocol See Internet and TCP/IP. (networking) Internet Protocol - (IP) The network layer for the TCP/IP protocol suite widely used on Ethernet networks, defined in STD 5, RFC 791. IP is a connectionless, best-effort packet switching protocol. video via satellite link, enabling a portable live streaming system. "We conducted the experiment based on locations such as marine vessels and mountain areas, where normal transmission routes including fixed LAN (Local Area Network) A communications network that serves users within a confined geographical area. The "clients" are the user's workstations typically running Windows, although Mac and Linux clients are also used. , wireless LAN A local area network that transmits over the air typically in the 2.4 GHz or 5 GHz unlicensed frequency band. It does not require line of sight between sender and receiver. Wireless base stations (access points) are wired to an Ethernet network and transmit a radio frequency over an area , FOMA See i-Mode. (R) and PHS (Personal Handyphone System) A TDMA-based cellular phone system introduced in Japan in mid-1995. Operating in the 1880-1930 MHz band, PHS uses microcells that cover an area only 100 to 500 meters in diameter, resulting in lower equipment costs but requiring more base are unavailable or, at best, difficult to maintain," said Yasukazu Hontama, President of Broadband Media Company at Oki Electric. "With the successful result which confirmed that the RS-M can transmit real-time video using a satellite phone connection, we believe the transmitter can be used in various applications, such as video transmission at disaster sites." The RS-M, launched in February 2005, is a video compression transmitter that can easily send real-time live video from remote locations by simply connecting to a camcorder. It integrates various functions necessary to transmit video, making possible an IP network based video transmitter with a compact size of 180mm (W) x 117mm (H) x 105mm (D) and weight of 1.2 kg. The system can compress a video image to the MPEG-4, with a maximum bandwidth of 1Mbps, transmitting real-time high definition video via various networks including fixed LAN, wireless LAN, FOMA, and PHS. Oki conducted the experiment to transmit video via the INMARSAT(1) satellite communication service as follows: 1. Encoded video taken by a small digital camcorder into MPEG-4(2) via RS-M 2. Transmitted compressed video compressed video - video compression to fixed satellite using the satellite phone system, INMARSAT M4 3. Received video at ground base station 4. Delivered to client PC via Internet Following are the type of video and transmission speeds used in various experiments: 1. Transmit 5 frame per second with QCIF See CIF. QCIF - Quarter CIF (3) with a 32Kbps transmission speed 2. Transmit 10 frame per second with QCIF with a 48Kbps transmission speed Through each experiment, video transmission was accomplished with a delay of 3 seconds or less, which was equivalent to video transmission via a FOMA line on ground. The experiments were conducted with the help of Teikoku Sen-I Co., Ltd., a company handling disaster prevention products. Teikoku Sen-I provided the satellite phone system, INMARSAT M4, used in the experiments. Glossary (1) INMARSAT: International Mobile Satellite Organization The International Mobile Satellite Organization (IMSO) is the organization overseeing distress and safety satellite communications provided by the Inmarsat satellites. External links
(2) INMARSAT M4: A satellite phone system by a Danish company Thrane&Thrane (3) QCIF: Quarter Common Intermediate Format About Oki Electric Industry Co., Ltd. Founded in 1881, Oki Electric Industry Co., Ltd. is Japan's first telecommunications manufacturer, with its headquarters in Tokyo, Japan. With the corporate vision, "Oki, Network Solutions for a Global Society," Oki provides top-quality products, technologies and solutions to its customers through its info-telecom system business, semiconductor business and printer business. All three businesses function as a collective force to create exciting new products and technologies that satisfy a spectrum of customer needs in various markets. Visit Oki's global web site at http://www.oki.com/. Notes: --FOMA is a registered trademark of NTT DoCoMo (NTT Mobile Communications Network, Inc., Japan) Founded in 1991, NTT DoCoMo is a spinoff of Japan's NTT (Nippon Telegraph and Telephone Corporation) which provides wireless services, including cellular, paging, satellite and maritime and in-flight telephone services. Inc. --Other names of companies and products are trademarks or registered trademarks of the respective companies and organizations. |
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