Cisco Technology, Inc.

Sawyer Shan

Hui Liu

Sijia Chen

Siping Tao

Jeffrey Lai

Techniques are provided for reference frame management for screen content video coding using hash or checksum functions. A video data stream including a plurality of frames is received, each frame including a plurality of pixels that define content within the frame. A plurality of hash code values associated with partitioned portions of a current frame are determined, where each hash code value is determined as an output value from a hash or checksum function based upon an input value comprising pixel values for a corresponding partition within the current frame. The current frame is compared with a plurality of reference frames based upon a comparison of the hash code values of the current frame with hash code values of the reference frames. A reference frame is selected as a candidate reference frame for coding the current frame.

Reference frame management for screen content video coding using hash or checksum functions

A method, a device and computer readable storage media facilitate detecting a scrolling area within digital content comprising a plurality of frames, wherein the detection includes a comparison between a current frame and a previous frame to determine at least one location within the current frame in which pixel values change in relation to a corresponding location of the reference frame, searching for a reference line of pixels within the scrolling area of the previous frame, in response to finding a reference line, searching for a corresponding matching line of pixels in the current frame that matches the reference line, and, in response to finding a corresponding matching line of pixels in the current frame, determining a degree of scrolling of content in the scrolling area of the current frame in relation to the previous frame.

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Anhui, China

Sawyer Shan