US 11,838,452 B2
Control apparatus, control method and program
Hiroyuki Kitada, Musashino (JP); Takafumi Okuyama, Musashino (JP); and Seisho Yasukawa, Musashino (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/636,488
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed Aug. 19, 2019, PCT No. PCT/JP2019/032279
§ 371(c)(1), (2) Date Feb. 18, 2022,
PCT Pub. No. WO2021/033234, PCT Pub. Date Feb. 25, 2021.
Prior Publication US 2022/0279249 A1, Sep. 1, 2022
Int. Cl. H04N 21/462 (2011.01); H04N 21/2385 (2011.01); H04N 21/2662 (2011.01); H04N 21/44 (2011.01); H04N 21/6332 (2011.01)
CPC H04N 21/4621 (2013.01) [H04N 21/2385 (2013.01); H04N 21/2662 (2013.01); H04N 21/44 (2013.01); H04N 21/6332 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A control device for controlling a bit rate selectable by a client terminal in a video distribution network in which video data is distributed, the control device comprising:
a database configured to store distribution information, band allocation information, and distribution system information, the distribution information including information regarding video data in a distribution system, the band allocation information including an allocated band of each session in which the distribution system performs video distribution, and the distribution system information including a channel band of the distribution system; and
a control unit, implemented using one or more computing devices, configured to:
receive a viewing request from the client terminal,
calculate an available band in the distribution system with reference to the database, and
determine a first maximum bit rate selectable by the client terminal based on the available band and one or more bit rates of video data corresponding to the viewing request,
wherein the control unit is configured to execute, for each entry in the band allocation information, based on a difference between a distribution start time and a current time being within a predetermined range, processing of overwriting the allocated band with a band for a stable phase.