公开(公告)号：US20190158836A1

公开(公告)日：2019-05-23

申请号：US15818114

申请日：2017-11-20

Applicant: ATI TECHNOLOGIES ULC

Inventor： Ihab AMER ,  Fabio GULINO ,  Edward HAROLD ,  Boris IVANOVIC ,  Haibo LIU ,  Ho Hin LAU ,  Gabor SINES ,  Catalin BEJU

IPC: H04N19/127 ,  H04N19/182 ,  H04N19/139

CPC classification number: H04N19/127 ,  H04N19/132 ,  H04N19/137 ,  H04N19/139 ,  H04N19/154 ,  H04N19/172 ,  H04N19/182

Abstract: An encoder of a multimedia system encodes data representative of each image in a video stream to form a bitstream that is transmitted over a network to a decoder that decodes the bitstream and provides the decoded information to a multimedia application for display to the user. As consecutive images may have nearly identical pixel values, the multimedia system detects pixel value variations between consecutive images that are below a specified threshold to reduce active processing on such pictures, which includes, for example, encoding, decoding, and post-processing. The multimedia system either selectively encodes or selectively processes the current image that has pixel values that vary from an immediately preceding image within the specified threshold.

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.