Patent ID: 11924484
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A method for acquiring a prototype manifest file performed by a system control apparatus for acquiring the prototype manifest file that is a basis of a manifest file to be transmitted to a viewing client in a system for delivering video data over a network, the method comprising:
analyzing content of a prototype manifest file acquired from an origin server to determine a next acquisition timing of a prototype manifest file;
acquiring the prototype manifest file from the origin server, based on the next acquisition timing;
comparing the prototype manifest file acquired at a current acquisition timing to a protype manifest file acquired at a previous acquisition timing;
changing processing according to whether or not the protype manifest files have the same content;
in response to determining that the prototype manifest file acquired at the current acquisition timing and the prototype manifest file acquired at the previous acquisition timing are different from each other:
calculating a statistical value for a time length of all or some segments of all segments in the protype manifest file acquired at the current acquisition timing; and
determining a timing of a time when the statistical value elapses from the current acquisition timing as the next acquisition timing.