公开(公告)号：US20190268622A1

公开(公告)日：2019-08-29

申请号：US16409415

申请日：2019-05-10

Applicant: ATI TECHNOLOGIES ULC

Inventor： Ihab AMER ,  Gabor SINES ,  Khaled MAMMOU ,  Haibo LIU ,  Edward HAROLD ,  Lei ZHANG ,  Fabio GULINO ,  Ehsan MIRHADI ,  Ho Hin LAU

IPC: H04N19/65 ,  H04N21/6375 ,  H04N19/44 ,  H04N21/44 ,  H04N21/442

Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.