Patent ID: 8629893

Claim:
A method for managing video images in a multipoint videoconference comprising: receiving by a decoder, a first video signal from a first video source encoder, the first video signal comprising a temporal predictive frame (P-frame), the P-frame coded in terms of motion vectors and block coding, and references a recently decoded P-frame: decoding the received P-frame based on the referenced recently decoded P-frame and sending an acknowledgement to the first video source upon successful decoding, else sending an un-acknowledgement to the first video source; receiving from the first video source, in response to the un-acknowledgement, a next P-frame, the next P-frame referencing to a long term reference frame (LTRF) stored in a memory on the decoder, wherein the LTRF is an instantaneous decoder refresh frame (IDR-frame) associated with the first video signal, and wherein the LTRF is updated based on at least one of: a triggering event and periodically; and decoding by the decoder, the received next P-frame using the LTRF as a reference frame.