Title:
映像通信/映像配信システム及び方法
Document Type and Number:
Japanese Patent JP4021633
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce traffic for a relay interval, in the case of distributing a video image from a video distribution server to a terminal taking part in a multi-point conference system, interlocked with a conference. SOLUTION: A plurality of video distribution servers 17, 18, 19 having the same video file are placed in advance to a router 23 in the vicinity of H. 323 terminals 11, 12, 13 on a network. First, one of the terminals 11, 12, 13 taking part in the conference requests nearby MCUs 14, 15, 16 having an MC (Multipoint Controller) to distribute a video image in interlocking with the conference. Then the MC transmits transport addresses (IP addresses and port numbers) with respect to a video distribution server and participating terminals and information of the video file to a management server 20. The management server 20 designates the nearest video distribution server and MP (Multipoint Processor) to the terminals 11, 12, 13 and returns a reply to the MC in the MCU. The MC in the MCU makes the nearest video distribution server to distribute the video image via the MP inside the MCU.
Inventors:
Hiroshi Watanabe
Fumihiko Ito
Yuji Kurusu
Fumihiko Ito
Yuji Kurusu
Application Number:
JP2001251361A
Publication Date:
December 12, 2007
Filing Date:
August 22, 2001
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04N5/92; H04N7/15; H04L45/122; H04L45/16; H04N21/21
Domestic Patent References:
| JP2001094959A | ||||
| JP9219851A | ||||
| JP2000078552A |
Other References:
渡辺汎,双方向映像通信と映像配信の融合サービスに適したネットワーク形態の検討,電子情報通信学会総合大会論文集,日本,電子情報通信学会,2001年 3月,B-7-1,134
長坂篤,マルチメディアコンテンツ情報流通,沖テクニカルレビュー,日本,沖電気工業株式会社,2001年 1月,第185号第68巻第1号,38
長坂篤,マルチメディアコンテンツ情報流通,沖テクニカルレビュー,日本,沖電気工業株式会社,2001年 1月,第185号第68巻第1号,38
Attorney, Agent or Firm:
Tsuyoshi Hashimoto
Uzawa Hidehisa
Uzawa Hidehisa