US 12,267,154 B2
Frame synchronization apparatus for a video signal
Yukihiro Sugawara, Tokyo (JP); Masashi Shiratori, Tokyo (JP); and Keita Iwami, Tokyo (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed on May 2, 2023, as Appl. No. 18/310,695.
Application 18/310,695 is a continuation of application No. PCT/JP2021/041215, filed on Nov. 9, 2021.
Claims priority of application No. 2020-186710 (JP), filed on Nov. 9, 2020.
Prior Publication US 2023/0308202 A1, Sep. 28, 2023
Int. Cl. H04J 3/06 (2006.01)
CPC H04J 3/0667 (2013.01) [H04J 3/067 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A frame synchronization apparatus comprising:
a reception unit configured to receive packet data including video data and a timestamp;
a frame memory configured to store the packet data received by the reception unit;
a time generation unit configured to generate a time based on a reference synchronization signal;
a reception time acquisition unit configured to acquire a reception time of packet data satisfying a predetermined condition based on the time generated by the time generation unit;
a timestamp acquisition unit configured to acquire the timestamp from the packet data satisfying the predetermined condition; and
a control unit configured to obtain a difference between the reception time and a time indicated by the timestamp, and read packet data from the frame memory in accordance with a variation in the difference, wherein
the video data of one frame is divided into a plurality of consecutive packet data and stored,
the packet data includes a marker bit indicating a boundary between frames in a case where subsequent packet data includes video data of another frame,
the reception time acquisition unit acquires the reception time of the packet data including the marker bit based on the time generated by the time generation unit, and
the timestamp acquisition unit acquires the timestamp from the packet data including the marker bit.