Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04N
PICTORIAL COMMUNICATION, e.g. TELEVISION
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21/00
Selective content distribution, e.g. interactive television or video on demand [VOD]
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H04N21/20
Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
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H04N21/25
Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
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H04N21/254
Management at additional data server, e.g. shopping server, rights management server
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H04N21/2543
Billing; , e.g. for subscription services
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H04N21/25435
involving characteristics of content or additional data, e.g. video resolution or the amount of advertising
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