Title:
マルチメディアマルチキャストコンテンツのためのECMおよびEMM配信
Document Type and Number:
Japanese Patent JP2004533735
Kind Code:
A
Abstract:
According to one embodiment of the invention, a free preview of a program can be provided to client computers in a multicasting system. This can allow viewers in the multicasting system to view a first portion of the program before deciding whether to order the program content. According to another embodiment, various distribution methods can be accomplished using encryption keys to distribute program content. According to yet another embodiment, an initial viewing period can be provided to allow negotiation of the encryption keys. According to another embodiment, rules and conditions for providing content in a multicasting environment can be utilized.
Inventors:
Peterka, petr
Splank, eric
Moloney, Paul
Medvinsky, Alexander
Splank, eric
Moloney, Paul
Medvinsky, Alexander
Application Number:
JP2002563678A
Publication Date:
November 04, 2004
Filing Date:
October 26, 2001
Export Citation:
Assignee:
General Instrument Corporation
International Classes:
G06F12/14; G06F19/00; G06F21/00; G06F21/10; G06F21/33; G06F21/60; G06F21/62; G06Q10/00; G06Q30/00; H04L9/08; H04N5/765; H04N7/16; H04N7/167; H04N7/173; H04N21/2225; H04N21/231; H04N21/2347; H04N21/254; H04N21/2543; H04N21/266; H04N21/4143; H04N21/4405; H04N21/442; H04N21/4627; H04N21/472; H04N21/6334; H04N21/6377; H04N21/6405; H04N21/6587; H04N21/8355; H04N21/8549; (IPC1-7): H04L9/08; G06F15/00
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita
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